Delivery of short messages in a packet radio network

Description: TECHNICAL FIELD [Detailed description of the invention]

Delivery of short messages over packet wireless networks Background of the invention The present invention delivers short messages to mobile stations and, in particular, access networks. Mobile support packet wireless network that uses a mobile communication network as a network Dual in a situation that is unreachable within the packet wireless network Mode Regarding delivery of short messages to mobile stations. Free people from those phone terminals without compromising the usefulness of fixed phone terminals There was a request to be able to move away from this, so the mobile communication system Is developing. With increasing use of various data transfer services in the office At the same time, various data services have been introduced into mobile communication systems. Wrap Efficient data processing with top computers wherever users move It is possible to do. Mobile communication networks transfer mobile data to users Provides an efficient access network for, thus providing real data Provides access to the work. For this purpose, current and future movements Various new forms of data services for work are planned. Europe Mobile communication systems such as GSM (Global System for Mobile Communications) Digital mobile communication systems have particularly good support for mobile data transfer. General Packet Radio Service (GPRS) is a new service for GSM systems GSM Ph at ETSI (European Telecommunications Standards Institute) ase2 + One of the topics of standardized work. The operating environment of GPRS is GPRS backboard. One or more subnetwork services interconnected by a network Consists of sarea. Subnetwork is a large number of packet data service nodes Consisting of SN, the service node is referred to here as the Containment GPRS Support Node (SGSN). Data moving packet data services through several base stations or cells Each GSM mobile communication network to provide to terminal equipment It is connected to (generally a base station system). Relay mobile communication network Provides packet-switched data transfer between a support node and a mobile data terminal. It Different subnetworks for these parts are specific GPRS gateway support External data such as the public exchange data network PSPDN via the GGSN It is connected to the network. For this reason, the GPRS service is a mobile data terminal. , GSM network, an external data network that functions as an access network It enables packet data transfer to and from the network. GPRS network The architecture is shown in Figure 1. A type of mobile communication network service is the short message service (SM). S). Short messages are sent in the form of signal messages, so they are short There is no need to establish a source-to-destination connection to send a message This service differs from voice and data services in that. show Data transfer by message is limited to one message. show Message service is asymmetrical, sending short messages that are sent on the move Communication is considered a different service than sending short messages that are mobile terminated .. In GSM networks, short messages are relayed over the control channel So you can receive and send them even during a call. Short message The Service Center SM-SC delivered a short message or failed delivery An entity that stores and resends short messages. all Short message passes through the short message service center SM-SC .. The short message service center is for any delivery to the mobile station MS. You can also receive short messages through your work. Short The Sage Service Center SM-SC sends the received short message to the mobile station. Gateway mobile exchange center for short message service for further delivery Transfer to Tar (SMS-GMSC). Short messages received from mobile stations show Through the Inter-Network Connection Mobile Exchange Center (SMS-IWMSC) for SMS-Message Service It is sent to the short message service center for delivery. show GPRS network short message to provide message service Gateway mobile exchange center for services SMS-GMSC and network connection mobile exchange center for short message service SMS-IW It has a contained GPRS support node SGSN connected to the MSC. Through these, GPR The mobile station MS belonging to the S network has a short message on the GPRS radio channel. Can be sent and received. Mobility Management (MM) activities for GPRS subscribers are in three different MM states of the mobile station MS. Characterized by one of them: idle, waiting and ready is there. Each state has a certain level of functionality and mobile station MS and accommodation GPRS support node SGSN Represents the information assigned to. Information sets about these states are collected The GPRS support node SGSN and mobile station MS are maintained, but these are MM content. I will write it as Cust. Containment GPRS support node SGSN context joins Consists of subscriber data such as IMSI and TLLI, and location or routing data, etc. To. When idle, mobile station MS is unreachable from the GPRS network perspective The network is the current state, location, or routine of the mobile station MS. It has no information, that is, MM context. Mobile station MS is in dual mode Can work with types, i.e. GPRS and GSM networks In that case, you are in the GSM network when GPRS is idle. Move Station MS moves from idle to ready by belonging to the GPRS network From standby or ready state by leaving the GPRS network It is possible to move to the dollar state. In standby and ready state, mobile station MS belongs to GPRS network .. Ready state is the actual data transfer that the MS can send and receive user data. It is in a state. When the GPRS network pages a mobile station, or the mobile station MS When initiating data transfer or signaling, the MS goes from standby to ready It changes. If user data is not transferred or signaling does not occur But the mobile station MS remains ready (during the timer preset timeout) You can also be. The mobile station is a "dual mode" mobile station and is in standby mode. Or when ready, for example, voice calls to mobile stations The paging required for the road exchange service is the GPRS network. This is done through the network's containment support node SGSN. In other words, GSM page Jing is performed as GPRS paging. Short message service center SM-SC shorts for delivery to mobile station MS When a message is received, the SMS Service Center sends the message Send to the gateway mobile exchange center for short message service SMS-GMSC, The gateway mobile exchange center looks up the destination MS address and the associated home location Requests routing information from the rotation register HLR. GSM network The location register HLR also contains GPRS subscriber data and routing information. I'm sorry. The home location register HLR contains the mobile station MS in the message. To GPRS Support Node (SGSN) Address or Mobile Service Exchange Center MSC Send the VLR address or both. HLR message only MSC / VLR address If included, short messages are usually delivered through the GSM network Is done. If the HLR message contains an SGSN address, a short message Service Gateway Mobile Exchange Center SMS-GMSC Receives Short Message SM Send to GPRS support node SGSN. Mobile station MS belongs to the network and is reachable If so, the containment GPRS support node SGSN is a mobile station for short message SM. Transfer to MS. However, for example, the radio channel condition is bad, or the mobile station MS is GPRS. Due to the fact that it is out of work, that is, it is idle The support node SGSN may not be able to deliver the short message SM to the mobile station MS. is there. HLR does not know the status of the mobile station, it only knows the address To. Containment support node SGSN fails to deliver short messages to mobile stations If not, the containment support node SGSN indicates that the mobile station is unreachable. Set MSNRF (= Mobile Subscriber Not Reachable Flag) and report failure Send to SMS-GMSC. The routing information received from the home location register HLR is the MSC / VLR add If it does not include a reply, SMS-GMSC indicates that there is a waiting message Send the message to the home location register HLR and send the message to its buff Remove from the short message service center and drop the failure report Return to Tar SM-SC. HLR waits for this mobile station at its register Update the field indicating that there is a sage. Mobile station reintroduces network If a new short message arrives for the same mobile station before belonging, HL R does not know that the mobile station is unreachable, so a new short message An attempt is made to deliver the Thus, unnecessary signarins in the network Is generated, but short messages cannot be delivered. Mobile service exchange center MSC / VL in addition to the address of the containment support node SGSN Short if R's address is received from home location register HLR Message SM cannot be delivered through service GPRS support node SGSN Therefore, gateway mobile exchange center for short message service SMS-GMSC Sends a short message SM to the Mobile Service Exchange Center MSC / VLR. Containing GPRS support node SGSN when the mobile station belongs to both networks A GSM paging request to the mobile station MS is sent through. Belongs to the network Because the mobile station you are using is unreachable, that is, it did not respond to the paging request. Shot message SM cannot be delivered to the mobile station through the contained GPRS support node SGSN If not, the mobile station MS is paging through the containment support node SGSN, so Short messages can also be delivered via the Mobile Service Exchange Center MSC / VLR I can not do such a thing. Visitor location register MSC / VR due to paging failure L sets the flag Mobile Subscriber Not Reachable Flag (MSNRF) and fails Short Message Service Gateway Mobile Exchange Center SMS-GMSC Return to Gateway Mobile Exchange Center, Home Location Register HLR In that register, a short message is waiting for this mobile station Request again to update the field indicating that. Now the mobile station is unreachable The indication of the fact is held in three positions. Moreover, the results are clear There is a mobile service exchange center MSC / VLR and accommodation support for paging Unnecessary signaling is taking place between the node SGSNs. When the mobile station becomes reachable again in the GPRS network, the SGSN becomes the mobile station MS. Send information about the fact that is available to the home location register To. When the mobile station becomes reachable on the GSM network, the same information will be provided by MSC / VLR. Sent to the location register. Received at home location register Resend short message using the above routine with the first information No information sent by SGSN or MSC / VLR is needed as the communication is started To. If the mobile station first becomes reachable in the GSM network, GPRS will You will be unnecessarily requested to deliver the short message first .. Also, if the network has just removed the mobile station MS, that is, it will be idle. If you do, due to the fact that the GPRS network cannot reach the mobile station That is, the mobile station does not respond to, for example, a paging request, which causes the above problem. However, the mobile station MS considers itself to belong to the GPRS network. That's right In such situations, the Mobile Service Exchange Center MSC / VLR is paging the GSM network. Attempts to contact the mobile station on the channel, but the mobile station is still a GPRS network You are listening to a paging channel, so you are paging from another channel. The message cannot be detected. Mobile service exchange center because results can be predicted MSC / VLR page signaling is unnecessary. Short messages can be delivered Instead, the information about the failure created the display in three places, thus home location. Generates unnecessary signaling between the station register and each network node To. Moved when an attempt was made to send a short message SM over the GPRS network If the motive MS is idle, a short message through the GSM network Sage SM transmission may be successful. Can deliver short message SM Possible (regardless of whether MSC / VLR succeeded in delivering the short message) The flag MSNRF, if any, was set in the containment network node SGSN. There is up to. As a result, when MS rejoined the GPRS network, a short message SGSN will display this (Note MS Present) even if the page does not have anything reserved. Send to home location register. Short message SM transmission failed If the visitor location register VLR sets the flag MSNRF And send a report about the delivery failure of the short message to SMS-GMSC. That After that, information about the fact that the mobile station is unreachable is held in three places, which Therefore, unnecessary signaling as described above occurs. Home location register HLR, especially when the mobile station MS is idle Is the most recent network address of the mobile station, ie MSC / VLR and SGSN addresses The fact that I don't know causes problems. Therefore, mobile stations reach through GPRS Even if not possible, the home location register HLR is in the routing information Returns both addresses. If GPRS is the main network, message first There have always been attempts to send through the GPRS network for the first time, thus moving Produces unnecessary signaling when a station is unreachable through a GPRS network It will be tampered with. Packet switching service and circuit switching GSM service cannot be used at the same time "Class B" If you are on a voice call on a mobile station, the mobile station will reach you through the GPRS network. I can't. Smell on GSM network when voice connection is established Short messages are sent directly through MSC / VLR as no separate paging is required. Can be delivered. However, a short message through the containment support node SGSN Connection because you are on a call when an attempt is made to deliver sage Even if it fails due to the fact that it has been postponed, the containment support node is Set the lag MSNRF as a failure indication. When the call is terminated, the mobile station MS GPRS Unnecessarily home location information about the fact that it exists on the network Sent to register HLR. Brief description of the invention An object of the present invention is a short message to a mobile station that can operate in two networks. It is to make the operation as simple as possible when the message is sent. An object of the present invention is a method characterized in that it is disclosed in an independent claim. And can be achieved by wireless networks. A preferred embodiment of the present invention is a dependent claim. Described in. In the present invention, the parameters that control network elements are signaling. Inserted into the message and / or information about the reachability of the mobile station It is supplied to the subscriber database such as the mulocation register. In a preferred embodiment of the present invention, a subscriber storing subscriber data of a mobile subscriber. Information about whether mobile stations are reachable through the main network to the database Information is provided. Join if the mobile station is reachable through the main network Person database is the address in the main network, and optionally the second ne Send the address in the network to the inquiring network element Responds to the routing information request. Mobile stations through major networks If unreachable, the subscriber database will be in the second network. Routine by sending the dress to the incoming network element Respond to information requests. The "major network" is the net trying to reach the mobile station It is part of the work, in other words the main route. "The second network Moves when an attempt to reach a mobile station through a major network fails Part of the network trying to reach the station, in other words the second route To. Therefore, the useful points of the method of the present invention and the wireless network are short messages. Sending the page to the mobile station Just then the mobile station is unreachable through the main network It is possible to reduce extra signaling when possible. A brief description of the drawing The present invention will be described in more detail with reference to the accompanying drawings by the following preferred embodiments. .. Of the attached drawings Figure 1 shows the architecture of the GPRS network. Figure 2 shorts to mobile station MS belonging to GPRS and GSM networks It is a signaling chart when an attempt is made to deliver a message. Figure 3 belongs to GPRS and GSM networks, then GPRS net When an attempt is made to deliver a short message to a mobile station that is off work It is a signaling chart Figure 4 is a signaling chart of the combination belonging to the network. Figure 5 shows a mobile station that is out of the GPRS network but belongs to the GSM network. It is a signaling chart when an attempt is made to deliver a message. , Figure 6 delivers a short message to a mobile station where the GPRS connection has been aborted. It is a signaling chart when an attempt is made. Detailed description of preferred embodiments The present invention is suitable for use in various combinations of two different data transmission systems. Yes, in these systems subscribers receive the same service through both systems be able to. The present invention particularly relates to the European digital mobile communication system GSM (Global Syst). em for Mobile Communications) or DCS1800 or PCS (Personal Communication) General Packet Radio Servic in equivalent mobile communication systems such as System) Suitable for use with e (GPRS). Below, the GPRS service and GSM system The main implementation of the present invention by a GPRS packet radio network consisting of a combination of devices. By way of example, the invention is limited to such types of specific packet radio systems. It is not something that can be done. Figure 1 shows the GPRS packet radio network implemented in a GSM system. There is. The basic structure of a GSM network consists of two parts. In other words, the base station subsi Stem BSS and network subsystem NSS. Base station subsystem BSS And the mobile station MS communicate via wireless link 14. For short message service , GSM network connects to short message service center SM-SC Have. SM-SC shows for delivery of short messages to mobile stations It has a gateway mobile exchange center SMS-GMSC for message service. For a more detailed description of the GSM system, ETSI / GSM recommendations and "For mobile communications" GSM System for Mobile Communications (M. Mouly MP See autet, Palaiseau, France, 1992, ISBN: 2-9507190-07-7). In the figure, the GPRS system connected to the GSM network supports one accommodation GPRS. GPRS network with node SGSN and one GPRS gateway support node GGSN Consists of These different support nodes SGSN, GGSN are Intra-Operator Bac It is interconnected by the kbone Network. GPRS network is a support node And it turns out that it is possible to have any number of gateway support nodes To. Accommodating GPRS support node SGSN is a node that accommodates the mobile station MS. Each support The node SGSN is a cell-type packet radio network with one or more cells. Manage packet data services in a. For this purpose, each support node SGSN is connected to a specific local part of the GSM mobile communication system (Gb interface) To. This connection is typically made to the base station subsystem BSS. Move within cell The station MS communicates with the base station BTS over the wireless interface 14, and also has a mobile communication network. Communicate with the support node SGSN in the service area to which the cell belongs through the network To. In principle, this is the mobile communication network between the support node SGSN and the mobile station MS. It only relays packets between the two. For this purpose, mobile communication network Packet switching data packet between mobile station MS and accommodating support node SGSN Provide a relay of. The mobile communication network is the mobile station MS and the support node SG. It only provides a physical connection between SNs, and its exact behavior and structure There is no essential importance to the present invention. When the mobile station MS belongs to the GPRS network, that is, regarding the GPRS Attach procedure, S GSN is a mobility management context that contains information about the mobility and safety of mobile station MS. (MM context) is established. To be clear, in this application, the mobile station network It mentions the affiliation to the office, the unreachability of mobile stations, etc. In this context A mobile station generally means a mobile unit or a mobile subscriber. In other words , Indicates the mobile subscriber's affiliation with the network, the mobile subscriber's unreachability, etc. You can also do it. Providing an association (Gs interface) between SGSN and MSC / VLR Is also possible. In the association, visitor location register MSC / VL R stores the SGSN address and the mobile station MS class, and SGSN is used for mobile-related data. Stores the address of the visitor location register VLR. Associations are only possible for Class A and Class B mobile stations, They can belong to both networks at the same time. The association is In combination with the containment support node SGSN via IMSI / GPRS affiliation and isolation, eg IMS Allows I affiliation and IMSI separation. IMSI affiliation means affiliation with GSM network To do. In addition, the association is a circuit exchange service, that is, a GSM service. And the mobile station MS is paging through the containment support node SGSN, in other words If mobile service exchange center MSC / VLR paging message SGSN paging Send a paging message to the containment support node SGSN This also has the result of performing paging. When a mobile station belongs to one of the networks and belongs to another network, Rui or combination When updating affiliation or combination location, the association Established. The association is related to isolation from one of the networks Be released. GPRS gateway support node GGSN allows the operator's GPRS network to other To the operator's GPRS system, and to the Inter-Operator Backbone Network, IP Data network such as network (Internet) or X.25 network Connect to 11-12. GGSN is the routing information about GPRS subscribers or SGSN It has an address. SGSN and GGSN functionality combined on the same physical node You can also do it. GSM network home location register HLR with GPRS subscriber data International Mobile Subscriber Identity (IMSI) with routing information Is incorporated into this information. HLR for each subscriber in its register The address list is maintained, and the address list waits for delivery to the mobile station MS. Short message service center SM-S that stores one short message Contains the address of C. Home location register HLR Moma according to the present invention Also, in that register, in the first embodiment, it is a GPRS network. Applies to maintain information about mobile station reachability in major networks Has been done. Containment GPRS support node SGSN is the home location register HL To R (direct signaling connection or between operators) It has a Gr interface (through backbone network 13). Movement times The home location register HLR of the mobile station MS is a mobile communication network other than the accommodated SGSN. It may exist in the network. An inter-operator backbone net that interconnects the operator device SGSN and GGSN Work 13 is realized in a local area network such as an IP network. You can also do it. Note that, for example, all features on a single computer are realized. By doing so, the operator GP without using the backbone network between operators It is also possible to realize an RS network. The backbone network between operators is a gateway service for different operators. A network in which port nodes GGSN can communicate with each other. Figure 2 shows that the mobile station MS belongs not only to the GSM network but also to the GPRS network. , Demonstrating signaling according to the present invention in situations where associations have been established. ing. Short Message Service Center SM-SC is a service for delivery to mobile station MS The mobile station is receiving the message SM, for example, moving to the shadow area. Because it is unreachable on the GPRS network, the mobile station MS has a GPRS network Cannot be reached through. To reduce unnecessary signaling Gateway mobile exchange center for mail message service SMS-GMSC is short Avoid sending messages through the GSM network, but this is paging Is because it happens through the GPRS network anyway. In the following description, numbers The letters represent the message or step in Figure 2. 1. Short Message Service Center SM-SC sends short message SM Send to gateway mobile exchange center SMS-GMSC for mail message service (Me ssage Transfer). 2. Gateway mobile exchange center for short message service SMS-GMSC Look up the address of the mobile station MS and from the mobile station's home location register HLR Send Routing Inf o for Short Message). 3. Home location register HLR confirms request (Send Routing Info for Short Message Ack) is a gateway mobile exchange for short message service Return to the conversion center SMS-GMSC. The confirmation signal is the mobile station's current SGSN address and MSC / VLR. Contains the address. The confirmation signal contains both addresses, so it is short-circuited. An attempt was made to deliver the message through the containment support node SGSN, which was successful. If it does not work, only then deliver through the Mobile Service Exchange Center MSC / VLR Will be tried. Home location register HLR contains only one address If not, the confirmation signal contains only one of the addresses, but in that case, the best The final signaling will be different. 4. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC Send short message SM to containment support node SGSN (Forward Short Messag) e). Five. Containment support node SGSN will forward short message SM to mobile station MS Attempts to fail (Message Transfer Failure). Failure is shadowed by mobile station MS Located in the area or the radio channel status is extremely poor for continuous transmission It can happen due to the fact that there is. 6. Containment support node SGSN is a message about a failed delivery attempt (Fail) ure Report) Short Message Service Gateway Mobile Exchange Center SM Return to S-GMSC. According to the first embodiment of the present invention, this message is a short message. Mobile service exchange for gateway mobile exchange center SMS-GMSC Do not attempt to send short messages through the conversion center MSC / VLR, It contains a parameter (not via MSC / VLR) that signals that. SMS-G The MSC parses the Failure Report message and sets the parameters (not via MSC / VLR). If detected, it will not send a short message through MSC / VLR. Fai SM if the lure Report message does not contain a parameter (not via MSC / VLR) S-GMSC performs "GSM paging" as described above for the description of the prior art. .. No parameters (not via MSC / VLR) are used in the examples of the present invention. But this happens. 7. Containment support node SGSN does not reach mobile station despite delivery attempt Set the flag MSNRF to indicate that. 8. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC Set Message Waiting Data to the home location register HLR of the mobile station MS send a message. According to the first embodiment of the present invention, this message is displayed by the mobile station MS. A parameter (MS not GPRS) that indicates unreachable through the PRS network Also includes. The parameters mentioned at the end will be described in more detail with respect to FIG. 9. Home location register HLR is a cash register for short message service Confirm receipt of message to Toway Mobile Exchange Center SMS-GMSC (Se t Message Waiting Data Ack). 10. Home location register HLR shorts delivery to mobile station MS By inserting a message display to wait at the Sage Service Center SM-SC Update the register (Message Waiting Indication Field). In addition, books In a major embodiment of the invention, the message sent in step 8 is the parameter (M). If S not GPRS) was included, the HLR would reach the mobile station MS through the GPRS network. Set a flag (MS not GPRS) to indicate that it cannot be reached. Flag is short It is retained as long as the message waiting data is retained. 11. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC , A short message sir that stores short message SMs for later delivery Message to Biscenter MS-SC regarding unsuccessful delivery attempt (Failure Repor) Returns t). 12. The mobile station MS will again have a GPRS network, for example by updating its routing area. Reachable in the network, containment support node SGSN regarding the existence of MS Receive a message (Routing Area update Complete). Also, the mobile station is again Use the other messages above to indicate that you have reached it by other means. You can also do it. Importantly, the containment support cell detects that the mobile station is reachable That is to say. 13. Containment GPRS support node SGSN verifies that the flag MSNRF is set Get out, clear the flag, and get information about the fact that the mobile station is reachable again Send (Note MS present) to the home location register HLR. 14. Home location register HLR waits for delivery to mobile station SM Detects that there is a message and issues a warning message (Alert Service Center) Send to the gateway mobile exchange center SMS-GMSC for short message service. 15. Home location register HLR has its Message Waiting Indication Me by removing the display of the message waiting for delivery from Fields to the mobile station MS Update ssage Waiting Indication Fields. At the same time, HLR has a mobile station MS GPRS. A flag according to the invention (MS not GPR) indicating that it cannot be reached through the work. Clear S). 16. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC Short Message Service Center for Alert Service Center -Send to SM-SC. 17. Short Message Service Center SM-SC sends short message SM Send to gateway mobile exchange center SMS-GMSC for mail message service (Me ssage Transfer) (same as step 1). 18. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC Look up the address of the mobile station MS and from the mobile station's home location register HLR Send Routing Inf o for Short Message) (same as step 2). 19. Home location register HLR confirms request (Send Routing Info for) Short Message Ack) is a gateway mobile exchange for short message service. Return to SMS-GMSC. The confirmation signal is the current SGSN address of the mobile station and the MSC / VLR ad. Including less. The confirmation signal contains both addresses, so a short message Attempts are made to deliver sage through the containment support node SGSN (step 3). Same as). 20. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC Send short message SM to containment support node SGSN (Forward Short Messag) e) (same as step 4). 21. Containment support node SGSN forwards short message SM to mobile station MS ( Message Transfer). 22. Containment support node SGSN has a message about successful delivery (Delivery R) eport) to Short Message Service Gateway Mobile Exchange Center SMS- Return to GMSC. 23. Gateway Mobile Exchange Center for Short Message Service SMS-GMSC Home Location Cash Register with Delivery Report Return to Star HLR and Short Message Service Center SM-SC. Parameter "Short message S through mobile service exchange center MSC / VLR Do not attempt to send M "to gateway for short message service Step by inserting into a message sent to a mobile exchange center SMS-GMSC In 6, the mobile service exchange center MSC / VLR and short message service explained earlier Unnecessary signaling between gateway mobile exchange center SMS-GMSC for service , And signaling caused by mobile station paging can be avoided. GSM paging is through the same containment support node GSM where paging failed It would have been done. In addition, there are drawbacks to the prior art approach, Set the flag MSNRF in the visitor location register VLR and the result Between the Mobile Service Exchange Center MSC and the Home Location Register HLR Unnecessary signaling can be avoided. Step 8 shows that the mobile station is unreachable through the GPRS network The parameter (Set Messaege Waiting Data) is inserted in the message and Home location register HLR at step 10 has this information in that register Updates home with information that mobile stations are re-reachable through GPRS Until the location register receives (that is, up to step 15 in the example in Figure 2) ) Unnecessary paging behavior in GPRS network can be avoided. HL If R receives an MS routing information request, the HLR will have MS as a parameter (MS not GPR). Check if you have S). Parameter (MS not GPRS) exists If the HLR is the mobile service exchange center MSC / VLR only address (ie SGSN) The address cannot be included in the response) by sending a routing information request Respond to. This, for example, due to the message not being delivered to the destination. Eliminate attempts to deliver unnecessary short messages over the GPRS network There is an advantage that it can be done. In addition, use the same information with other GPRS services Can be done. The parameter (MS not GPRS) is (eg figure If it does not exist (before step 10 and after step 15 in example 2), the HLR is a mover. Rute by sending the address of the service exchange center MSC / VLR and the SGSN address Respond to the ing information request. All parameters (MS not GPRS) in the examples of the present invention This happens even if it is not used often. In the first embodiment of the present invention described above, both parameters "move short message SM" Do not attempt to send through the Service Exchange Center MSC / VLR " "Inaccessible through GPRS network" was used. This makes the sig Best results are obtained from a knurling point of view. However, only one of these It is also possible to use the signaling message compared to the prior art. The number of sage can be reduced. One of the parameters is omitted In this case, the signaling will be different from the above. Steps are not stated in absolute time series. Some of the steps mentioned above Are done at the same time or in a different order. Step 6 and steps for those steps And 7, 9 and 10, 12 and 13, 14 and 15, and 22 and 23 are included. Figure 3 shows signaling in a situation similar to that shown in Figure 2. Only different The point is that the delivery mobile station MS GPs after the delivery of the short message MS is unsuccessful. It is out of the RS network. Short message as quickly as possible To ensure delivery, the visitor location register MSC / VLR is also Home location register HLR warns of mobile station presence in network You need to do it. In the description below, the numbers are the messages or letters in Figure 3. Represents Tep. Steps 1 to 11 are the same as in FIG. 1. Short Message Service Center SM-SC is Short Message S Gateway Mobile Switching Center 1S for M Short Message Service Transfer to MS-GMSC (message transfer). 2. Gateway Mobile Switching Center S for Short Message Service MS-GMSC looks up the address of the mobile station MS and the mobile station Home location register HLR for short messages Request indicated information (send routing information for short messages). 3. Home location register HLR short message recognition of request Return to Gateway Mobile Switching Center SMS-GMSC for service (see) Recognition of sending route instruction information for yoto messages). Current SGSN for cognition Contains the address and the MSC / VLR address of the mobile station MS. Cognition includes both addresses, so short messages are serving support Attempts to send via the node SGSN, and if unsuccessful, only then Is done via the Mobile Service Switching Center MSC / VLR. Home location If the application register HLR contains only one address, cognition It is possible to include only one address, but in that case the signal transmission is different come. 4. Gateway Mobile Switching Center S for Short Message Service MS-GMSC sends a short message SM to the serving support node SGSN Transfer (short message transfer). 5. Serving support node SGSN mobiles short message SM Attempts to transfer to the MS are unsuccessful (message transfer failed). Of failure The cause is that the mobile station MS is in the shadow area or the wireless communication path condition is bad. I can't send it well. 6. Message that Mobile Station MS failed to send (failure report) The gateway mobile switching center SMS for short message service -Return to GMSC. This message is for short message service To Way Mobile Switching Center SMS-GMSC (not via MSC / VLR) ) Contains parameters for signal transmission. 7. Serving support node SGSN tries to communicate with mobile station Set the flag MSNRF to indicate that it could not be seen. 8. Gateway Mobile Switching Center S for Short Message Service MS-GMSC is the home location register HL of mobile station MS Send a message of set message waiting data to R. This message The mobile station MS is not reachable via GPRS network It is desirable to include the information (MS unreachable via GPRS). 9. Home location register HLR is a short message service Receive a message from the gateway mobile switching center SMS-GMSC Notify that (set message waiting data recognition). 10. Home location register HLR is a short message service Message waiting to be handed over to Mobile Station MS on Inter SM-SC Insert the sign and update its record book (message waiting sign field). If the message sent in Tep 8 contains that information, the mobile station A flag indicating that the MS could not be reached via the GPRS network ( MS is not possible with GPRS) is set. 11. Gateway Mobile Switching Center for Short Message Service SMS-GMSC shorts a message (failure report) that sending failed Return to Sage Service Center SM-SC and SM-SC will be sent later. Memorize the message SM. 12. The mobile station is disconnected from the GPRS network. GPR The separation from S is done by the serving support node SGSN, which is a mobile station. Make a disconnect decision or wait when the MS does not respond to the paging request As time runs out, the mobile station MS and the serving support node SGSN Both updated the indication that MS has changed to idle in the MM context. It depends on either. The last alternative, mobile station MS can be reached via the GSM network. 13. Serving GPRS support node SGSN is a mobile service switching unit Notify the inter-MSC / VLR that the link has been canceled. Second embodiment of the present invention According to the example, the serving support node SGSN has the same message, the visitor Set the flag MSNRF in the location register MSC / VLR Send the parameters (MSNRF settings) to instruct. 14. Parameters from serving support node SGSN (MSNRF setting) Upon receipt of the fixed), the visitor location register MSC / VLR will be mobiles. Flag M as a sign that the station cannot be reached by the GSM network Set the SNRF. The parameters (MSNRF settings) in step 13 are set according to the second embodiment of the present invention. From the serving support node SGSN to the mobile service switching center M Insert it into a message sent to SC / VLR, followed by a hula in step 14. MSNRF is set in the visitor location register MSC / VLR By doing so, the earliest machine that the mobile station registers with any network It is guaranteed that you can send a short message to the meeting. Flag in step 14 If you do not set the short message SM, the mobile station will GPRS Sent only after connecting to the network. In step 6, "Short via Mobile Service Switching Center MSC / VLR" Short message with the parameter "Don't try to send message SM" Gateway Mobile Switching Center for Services Sent to SMS-GMSC Mobile Service Switching Center MSC / V by inserting in message Gateway Mobile Switching Center S for LR and Short Message Service Due to signal transmission to and from MS-GMSC and paging of mobile stations Signal transmission is avoided. Paging uses the serving support node SGSN It was done via. In step 8, reach the mobile station via GPRS network A parameter indicating that it will not come is inserted in the message, and in step 10, ho Home if the location register HLR updates the information in its register The location register will hold until this information is useful in the register (ie, step). In response to the routing information request to the mobile station MS, Send only the address of the mobile service switching center MSC / VLR. This is an example For example, the message cannot be sent to the destination, so short mail via GPRS It has the advantage of eliminating unnecessary attempts to send the message. The same information It can also be used with other GPRS. How Mobile Station MS Sends Short Messages to the Network It depends on whether you are connected. Mobile Station First GMS Net Its Existence If you let us know in the work (IMSI concatenation), the short message will be GSM network It is sent in the usual way via the mail. "Mobile subscribers via GPRS network If the "unreachable" parameter is not used, the short message service Gateway Mobile Switching Center SMS-GMSC for both networks Receive the address and first send a short message over the GPRS network Attempts are unsuccessful, and only then are they attempted over the GSM network. Deer And the mobile station MS listens to the GMS control channel, and the GMS paging Since it is irrelevant, it runs as normal paging, so short messages The delivery will be successful. However, the flag MSNRF is a serving GPRS service It remains set in the port node. Next, Mobile Station MS is GPR When connected to the S network, the serving support node SGSN flags Clear and network home location registration information about MS arrivals Sent to Tar HLR, and HLR said from its record book, "Mobile subscribers are GPRS Network. "Unreachable via the box" parameter, such a parameter is used If so, delete it. Mobile station first connects or combines with GPRS network Once connected, a short message will be sent to the mobile station MS in Figure 2. Made via GPRS using the signaling mentioned in (steps 13-23) To. In the second embodiment of the present invention, there are three parameters, that is, "mobile service switching". Do not try to send short message SM via center MSC / VLR " "Mobile subscribers are unreachable via GPRS network" "MSNRF settings" Everything was used, but this would give the best results from a signal transmission point of view. U. However, one or two of these parameters may be used to transmit the signal. The number of sages can be reduced compared to the prior art. One or more If the parameters are omitted, the signal transmission will also be different from the above. The steps are not described in the absolute time order of Figure 3. Some of the above steps Occur at the same time or in a different order. Steps 6,7, for such steps Includes 9,10. FIG. 4 shows the signal transmission according to the third embodiment of the present invention, according to which the mobile station 4tion MS is connected to GPRS network and connected to GSM network Sa Visitor location if you can or if you make a combination connection The flag MSNFR set in the register MSC / VLR is cleared. So If, the short message is a mobile station via the GPRS network Visitor location register MS sent / or now sent to MS The flag MSNFR set in C / VLR is unnecessary and extra signal transmission is performed. Will be. The signal transmission shown in FIG. 4 can be combined with the signal transmission shown in FIG. You can, but this is also via the Mobile Service Switching Center MSC / VLR. Do not try to send a message SM "and" Mobile subscribers are GPRS Without inserting the "unreachable via network" parameter, or one of the parameters It can be done by inserting only one. At the same time as sending the signal shown in Fig. 4, Fig. 2 Via GPRS, using the signal transmission described in (steps 13-23). You can send a short message SM to the mobile station MS. Figure The signal shown in 4 can be sent to the dual mode mobile station. Single mode mobile station connects to only one network at a time can do. Figure 4 shows the result of the combination connection. The association is already shown in the figure Established before signal transmission. Mobi already connected to the GPRS network The connection of the Lustation MS to the GSM network (IMSI connection) is simultaneous. It is done via the serving support node SGSN while establishing the association So, the signal transmission is also the same, and only the name of the message may be different. The following theory To be clear, the numbers relate to the message or step in FIG. 1. Mobile station MS serves connection (connection completed) Support node Inform SGSN. 2. Serving support cell SGSN is a mobile station MS GMS network Visitor location register for connection recognition to network (TMSI reassignment completed) Send to MSC / VLR. For cognition, the parameters according to the third embodiment of the present invention (M) SNRF release) is included and visitor location register MSC / VL Instruct R to clear the flag MSNRF. 3. Visitor location register MSC / VLR clicks flag MSNRF Rear. In step 2, set the parameter "MSNRF release" to the visitor location register. Mobile service switching center by inserting it in the message sent to Avoids unwanted signal transmission between the MSC and the home location register HLR To. When receiving GSM connection recognition from the serving support node SGSN, Jitter location register MSC / VLR is the home location register Notify HLR that Mobile Station MS is reachable in the network The same result can be obtained if it is done. Mobile station is GPRS network Home location register keeps information that it cannot be reached via network When you don't have a mobile station connected to the GSM network Once connected to the GPRS network, the same principle can be applied. Figure 5 shows the mobile station disconnected from the GPRS network. Sends a short message SM when is connected to a GSM network Indicates the signal transmission required for attachment. Short to reduce unnecessary signal transmission Gateway Mobile Switching Center for Message Services SMS-GMSC Paging will be done over the GPRS network anyway So you have to avoid sending short messages over the GMS network Absent. In the following description, the number refers to the message or step in FIG. 1. Short Message Service Center SM-SC is Short Message S Gateway Mobile Switching Center SM for M Short Message Service Transfer to S-GMSC (message transfer). 2. Gateway Mobile Switching Center S for Short Message Service MS-GMSC looks up the address of the mobile station MS and the mobile station Home location register HLR for short messages Request indicated information (send routing information for short messages). 3. Home location register HLR short message recognition of request Gateway Mobile Switching Center for Services 1 Return to MS-GMSC Recognition of sending route instruction information for yoto messages). Current SGSN for cognition Contains the address and the MSC / VLR address of the mobile station MS. Cognition includes both addresses, so short messages are serving support Attempts to send via the node SGSN, and if unsuccessful, only then Is done via the Mobile Service Switching Center MSC / VLR. One for cognition It is possible to include only the address of, but in that case a short message Will be attempted to send via only one network. 4. Gateway Mobile Switching Center S for Short Message Service MS-GMSC sends a short message SM to the serving support node SGSN Transfer (short message transfer). 5. Serving support node SGSN is mobile Shon MS is, GP Detects disconnection from RS network (MS = GPRS disconnection) Shi). 6. Serving support node SGSN is a short message service. Attempts to send to the gateway mobile switching center SMS-GMSC failed Returns a message (failure report). 7. Serving support node SGSN is the result of the attempt Mobile Station M Set the flag MSNFR to indicate that S could not be reached. 8. Gateway Mobile Switching Center S for Short Message Service MS-GMSC is a short message to the mobile service switching center MSC / VLR. Transfer sage SM (short message transfer). 9. Mobile Service Switching Center MSC / VLR is usually a GSM network Forward short messages to mobile station MS via transfer). Mobile Station MS was disconnected from the GPRS network So I'm listening to the GSM paging channel and sending a short message SM Was successful. 10. Mobile Service Switching Center MSC / VLR is a short message Send to Gateway Mobile Switching Center SMS-GMSC for service Returns a message of gong (sending report). 11. Gateway Mobile Switching Center for Short Message Service SMS-GMSC will be sent to the Short Message Service Center SM-SC Returns a message of success (sending report). 12. Gateway Mobile Switching Center for Short Message Service SMS-GMSC is the home location register for mobile station MS Returns a successful delivery message to HLR (send report). According to the fourth embodiment of the present invention For example, Gateway Mobile Switching Center SM for Short Message Service S-GMSC reaches mobile station MS via GPRS network Messe a parameter (MS unreachable via GPRS) indicating that it cannot be reached Insert it into the page. Gateway mobile switching for short message service Nothing because the center receives a failure report from the serving support node SGSN Insert a parameter in the condition, or the failure report sent in step 6 is also "mo" "Unreachable to building contractor MS via GPRS network" parameter Contains parameters to insert in messages sent to the location register It may be out. 13. Home location register HLR, mobile station MS is G A flag indicating that it cannot be reached via the PRS network (M in GPRS) S impossible) is set. 14. Short Message Service Center sends to Mobile Station MS Receive a new short message to attach. 15. Short Message Service Center SM-SC is a short message Show at Gateway Mobile Switching Center SMS-GMSC for Services Transfer message SM (message transfer) (same as step 1). 16. Gateway Mobile Switching Center for Short Message Service SMS-GMSC looks up the address of the mobile station MS and the mobile station Route to short message to home location register HLR Request instruction information (send route instruction information for short messages) (step Same as P2). 17. Home Location Register HLR Short Message Recognizing Requests Return to Gateway Mobile Switching Center SMS-GMSC for the service ( Recognition of sending route instruction information for short messages). Home location for cognition The exchange register HLR says, "Mobile contractor MS is via GPRS network. Has the "Unreachable" flag, so the current MS of the mobile station MS Only the C / VLR address is included. 18. Gateway Mobile Switching Center for Short Message Service SMS-GMSC is short-circuited to the mobile service switching center MSC / VLR. Transfer the message SM (short message transfer) (same as step 8). 19. Mobile Service Switching Center MSC / VLR is usually a GSM network Forward short messages to mobile station MS via message (message) Transfer). Mobile Station MS is disconnected from the GPRS network So I'm listening to the GSM paging channel and sending a short message SM The attachment was successful (same as step 9). 20. Mobile Service Switching Center MSC / VLR is a short message Send to Gateway Mobile Switching Center SMS-GMSC for service Return a message of gong (sending report) (same as step 10). 21. Gateway Mobile Switching Center for Short Message Service SMS-GMSC will be sent to the Short Message Service Center SM-SC Returns a message of success (sending report) (same as step 11). 22. Gateway Mobile Switching Center for Short Message Service SMS-GMSC is the home location register for mobile station MS Returns a successful delivery message (delivery report) to the HLR. In this case, short message Gateway Mobile Switching Center SMS-GMSC for Sage Services Check the parameter "Mobile contractor MS is unreachable via GPRS network" Do not insert into the sage. 23. Mobile Station MS is the closest serving support node SGS With N, connect to the GPRS network again (connection completed). 24. Serving GPRS support node SGSN has flag MSNRF The mobile station MS will detect that it has been set and clear the flag. Home location register HLR is now reachable again (MS presence note) Send the information. 25. Home location register HLR, MS is GPRS network Clear the flag that marks it as unreachable via. After that, to request route instruction information In response, the mobile station has both SGSN and MSC / VLR addresses. Give one. Parameter of "Mobile contractor MS is unreachable via GPRS network" Insert into the message sent to the home location register HLR in step 12 Enter and keep the flag in the home location register HLR register By doing so, the mobile station is disconnected from the GPRS network Meanwhile, Gateway Mobile Switching Center S for Short Message Service Avoid unnecessary signal transmission between MS-GMSC and serving support node SGSN Be kicked. The above parameters can also be used to send data other than short messages. To. In addition, the signal transmission message sent in step 24 is the home location. It is important because it creates changes in the Gister HLR. Signal transmission for disconnection is mobile station MS and serving support Is the mobile station a network because it is only done between the SGSNs? "Mobile contractor MS is unreachable via GPRS network" It makes no sense to send the parameter "" to the home location register HLR. Mobile station while the mobile station is disconnected from the network It is completely uncertain if an attempt will be made to send a short message to There is no point in sending a special signal to the mulocation register. Usually in the present invention Signal transmission is used, thereby reducing unnecessary signal transmission. If the GSM network did not successfully send the short message, the above Signal transmission is a little different. In that case, set the message in step 12. Iting data message (same as step 8 in Figure 2) is home location It was sent to the register and exactly as it was done in step 12 of the above description. In addition, the parameter of "Mobile contractor MS is unreachable via GPRS network" Will be inserted in the message. In which message the parameter is inserted Home location register HL, regardless of whether the parameter was inserted It has the same effect on the operation of R. The steps described in Figure 5 are not in absolute time order. Of the steps described above Some may occur at the same time or in a different order. Such a step Includes steps 4 and 5, 7 and 8, 11 and 12, 21 and 22. Figure 6 shows the circuit switching connection (for example, by voice call) and the data packet. You cannot receive a call at the same time, that is, a "class B phone", a dual Indicates signal transmission in the case of a Lumode telephone. GPRS connection for such phones is mobile If the service switching center MSC / VLR is connected, it will be canceled. Show Message is sent by the current GSM channel in the circuit switching connection. Since it can be used, it can be easily sent to the mobile station MS. In the explanation below, the number is Refers to the message or step in Figure 6. 1. Short message service center SM-SC is a short message SM, gateway mobile switching center for short message service Forward to SMS-GMSC (message forwarding). 2. Gateway Mobile Switching Center S for Short Message Service MS-GMSC looks up the address of the mobile station MS and the mobile station Home location register HLR for short messages Request instruction information (send route instruction information for short messages). 3. Home location register HLR short message recognition of request Return to Gateway Mobile Switching Center SMS-GMSC for service (see) Recognition of sending route instruction information for yoto messages). Current SGSN for cognition Contains the address and the MSC / VLR address of the mobile station MS. Cognition includes both addresses, so short messages are serving support Attempts to send via the node SGSN, and if unsuccessful, only then Is done via the Mobile Service Switching Center MSC / VLR. 4. Gateway Mobile Switching Center S for Short Message Service MS-GMSC sends a short message S to the serving support node SGSN Transfer M (short message transfer). 5. Serving support node SGSN, mobile station MS, GP Detects that it is on hold from the RS network. 6. Serving support node SGSN is a short message service. Attempts to send to the gateway mobile switching center SMS-GMSC failed Returns a message (failure report). Circuit switching according to a fifth embodiment of the present invention As soon as the connection is lost, to the mobile station via the GPRS network Insert a parameter marked as reachable (GPRS reachable) in the message. In that case, the serving support node SGSN is on hold at the mobile station. Since it is, do not set the flag MSNRF. 7. Gateway Mobile Switching Center S for Short Message Service MS-GMSC is a short message to the mobile service switching center MSC / VLR. Transfer sage SM (short message transfer). 8. Mobile Service Switching Center MSC / VLR is Mobile Station MS Usually forward short messages over the GSM network (short) Message forwarding). 9. Mobile Service Switching Center MSC / VLR is a short message service Successful delivery to gateway mobile switching center SMS-GMSC for bis Returns a message (sending report). 10. Gateway mobile switching center for short message service SMS-GMSC will be sent to the Short Message Service Center SM-SC Returns a message of success (sending report). 11. Gateway Mobile Switching Center for Short Message Service SMS-GMSC is the home location register for mobile station MS Returns a successful delivery message to HLR (send report). In that case, short message Gateway Mobile Switching Center SMS-GMSC for Page Services, Figure Gaming for short messaging services, as detailed in connection with 5. The message received by the Tway Mobile Switching Center is "Mobile contractor MS is GP Since it contains the parameter "reachable via RS network", its parameters GPRS network for mobile station MS, even if data is used Parameter indicating that it cannot be reached via GPRS (MS reached via GPRS) Do not insert (impossible) in the message. When the circuit switching connection is released, the mobile service switching center MSC / VLR Sends (resumes) a message to the serving support node SGSN and this message Based on the page, the serving support node can resume packet switching data transfer. Can be done. Resume message mobile to home location register HLR To SGSN to let you know that Station MS is reachable again Since it is not possible to do so, by inserting the parameter in step 7, it is described earlier. As you can see, the short message is first sent over the GPRS network Is guaranteed. Otherwise, GPRS paging will provide serving support Since it uses the node SGSN, paging of the mobile station anyway Trying to send a short message over the GSM network Attempts will be made. This is the Mobile Service Switching Center MSC Causes unnecessary signal transmission between / VLR and serving support node SGSN Rub. Send a short message directly to the serving support node SGSN Therefore, unnecessary signal transmission can be avoided. In addition, for some reason, step 9 shorts the mobile station MS. If you can't send the message, we have a gateway for short message service Immobil switching center SMS-GMSC is a mobile service switching center MS From C / VLR, Mobile Station MS is reachable via GPRS network Serving Support No as soon as it detects the receipt of a failure report message saying Noh Send a short message to send via SGSN. In step 9 Since the short message could not be sent, the circuit switching connection was canceled and the service was provided. Support node SGSN again mobile station via GPRS network You can try to send to MS. The steps shown in Figure 6 do not represent an absolute time sequence, but were described earlier. The steps can occur simultaneously or in a different order. Such a step Includes steps 10 and 11. Each of the parameter insertions described in connection with the above figure is independent of other parameter insertions. It can be done upright and can be inserted freely to avoid unnecessary signal transmission. signal The name of the sent message is different from the above explanation, but the information sent in the message is It is the same. The message may contain information other than those mentioned above. For the sake of clarity, the present invention is based on the GPRS network as the basic network. It has been described above on the assumption that. The basic network is GSM network It may be For operators, which route is the basic network You can choose which is the secondary network. The accompanying drawings and their description are for illustration purposes only. Request to attach Different changes or modifications to the present invention may be made without departing from the scope and spirit of the term. What can be done is self-evident to those skilled in the art.