Radio communication system and method for multitask communication
Abstract
In a base station apparatus 102, when an IGMP control message is contained in a variable-length packet in which is indicated the destination for performing communication in one-to-one or one-to-multiple mode with mobile station apparatuses 106-1 through 106-3, the IGMP control message is mapped onto a fixed-length short packet that is shorter than a fixed-length packet used in communication with mobile station apparatuses 106-1 through 106-3, and also, a variable-length packet is mapped onto a fixed-length packet and a frame signal is composed from this fixed-length packet and the short packet, and is transmitted. In mobile station apparatuses 106-1 through 106-3, the frame signal is decomposed and the variable-length packet and short packet are extracted, the IGMP control message is extracted from the short packet and mapped onto another variable-length packet, and both variable-length packets are multiplexed. <IMAGE>

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Projected expiry passed 25 June 2021, 5.2 years ago.
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9 claims: 4 independent, 5 dependent
- 1PATENTOVÉ NÁROKY 1. Radiový přístroj, vyznačující se tím, že obsahuje:prostředky rozhodující, zda informace řídící procedury pro řízení paketové komunikace jsou nebo nejsou obsaženy v paketu s proměnnou délkou, ve kterém je indikován cíl pro vykonání komunikace s dalšími radiovými přístroji v módu jeden-ku-jednomu nebo jeden-ku-několika;a prostředky, které v případě, kdy je rozhodnuto, že zmíněné informace řídící procedury jsou obsaženy, mapují zmíněné informace řídící procedury do krátkého paketu s pevnou délkou, který je kratší než paket s pevnou délkou používaný pro komunikaci s dalšími radiovými přístroji. se t i m , že dále obsahuje: prostředky pro mapování paketu s proměnnou délkou do paketu s pevnou délkou, a vytvářející stránkový signál z tohoto namapovaného paketu s pevnou délkou a z krátkého paketu, do kterého byly namapovány informace řídící procedury, a vysílající zmíněný stránkový signál.
- 24. Radiový přístroj podle nároku 3, vyznačující se t i m , že dále obsahuje:prostředky pro rozkládání stránkového signálu a pro získání paketu s proměnnou délkou a krátkého paketu;prostředky pro získání informací řídící procedury ze zmíněného krátkého paketu a pro namapování zmíněných informací řídící procedury do dalšího paketu s proměnnou délkou;a prostředky pro multiplexování obou zmíněných paketů s proměnnou délkou. * Φ φ φ · · φ φ • ΦΦΦ φ φ φ -15φ φ φφφφφφφ φφφ φφφφ φφ φφ φφ φφφφ
- 35. Radiový přístroj podle nároku 1, vyznačující se tím, že zmíněnými informacemi řídící procedury jsou IGMP (Internet Group Multicast Protocol Internetový Skupinový Víceúlohový Protokol) informace.
- 46. Radiový přístroj podle nároku 1, vyznačující se tím, že zmíněným paketem s proměnnou délkou je IP (Internet Protocol - Internetový Protokol) paket.
- 57. Radiový komunikační systém, ve kterém jeden stanicový přístroj z přístroje pro mobilní stanice vybaveného radiovým přístrojem a z přístroje pro základní stanici vybaveného radiovým přístrojem vykonávají přidělování radiových zdrojů, vyznačující se tím, že zmíněný radiový přístroj obsahuje:prostředky pro rozhodování, zda informace řídící procedury pro řízení paketové komunikace jsou nebo nejsou obsaženy v paketu s proměnnou délkou, ve kterém je indikován cíl pro vykonání komunikace s dalšími radiovými přístroji v módu jeden-ku-jednomu nebo jeden-ku-několika;a prostředky, které v případě, kdy je rozhodnuto, že zmíněné informace řídící procedury jsou obsaženy, mapují zmíněné informace řídící procedury do krátkého paketu s pevnou délkou, který je kratší než paket s pevnou délkou používaný pro komunikaci s dalšími radiovými přístroji.
- 68. Radiový komunikační systém vybavený radiovým přístrojem a komunikačním síťovým přístrojem, který vysílá a přijímá pakety s proměnnou délkou do a ze zmíněného radiového přístroje přes směrovač, vyznačující se tím, že zmíněný radiový přístroj obsahuje:prostředky pro rozhodování, zda informace řídící procedury pro řízení paketové komunikace jsou nebo nejsou obsaženy v paketu s proměnnou délkou, ve kterém je indikován cíl pro vykonání komunikace s dalšími radiovými přístroji v módu jeden-ku-jednomu nebo jeden-ku-několika;prostředky, které v případě, kdy je rozhodnuto, že zmíněné informace řídící procedury jsou obsaženy, mapují zmíněné informace řídící procedury do krátkého paketu s pevnou délkou, který je kratší než paket s pevnou délkou používaný pro komunikaci s dalšími radiovými přístroji.
- 79. Způsob víceúlohové komunikace, vyznačuj ící se tím, že, je-li vykonávána komunikace mezi radiovými přístroji v módu jeden-ku-jednomu nebo jedenku-několika, v případě, že jsou informace řídící procedury pro řízení paketové komunikace obsaženy v paketu s proměnnou délkou, ve kterém je indikován cíl pro vykonání zmíněné komunikace, radiový přístroj mapuje zmíněné informace řídící procedury do krátkého paketu s pevnou délkou, který je kratší než paket s pevnou délkou používaný pro komunikaci s dalšími radiovými přístroji, a vysílá zmíněné informace řídící procedury.
- 810. Způsob víceúlohové komunikace podle nároku 9, vyznačující se tím, že paket s proměnnou délkou je mapován do paketu s pevnou délkou, a z tohoto namapovaného paketu s pevnou délkou a z krátkého paketu, do kterého byly namapovány informace řídící procedury, je vytvářen stránkový signál a je vysílán.
- 911. Způsob víceúlohové komunikace podle nároku 10, vyznačující se tím, že ze stránkového signálu jsou získány paket s proměnnou délkou a krátký paket, z tohoto krátkého paketu jsou získány informace řídící procedury a jsou mapovány do dalšího paketu s proměnnou délkou, a potom jsou oba pakety s proměnnou délkou multiplexovány.
Independent claims9
122 paragraphs in 1 section, as filed
Field of technology
The present invention relates to a radio communication system and a multi-tasking communication method that performs multi-tasking communication (one-to-one communication) using IP (Internet Protocol) between a base station device and a group of mobile station devices such as mobile phones. in a digital mobile communication system, and more precisely a radio communication system and a method of multi-tasking communication, which performs multitasking communication using IGMP (Internet Group Multicast Protocol).
Prior art
A radio communication system and a multi-tasking method of this type have been previously described in Unexamined Japanese Patent Laid-Open No. 2000-32007.
Fig. 1 is a block diagram showing a configuration of a conventional mobile communication system.
In Fig. 1, a router (IGMP compatible router) 3 is connected to the device for the base station 2, and an IGMP compatible network 4 is connected to the router 3. The group of devices for the mobile stations 6-1 to 6-3 is arranged so that it can be arbitrarily connected to terminal devices, such as communication terminals, 7-1 to 7-3 equipped with computer functions. C
As shown in Fig. 2, the apparatus for the base station 2 comprises a radio transmitter / receiver unit 11, a modulator / demodulator 12, a page folding unit 13 and a network interface unit 15.
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As shown in a representative case of the mobile station apparatus of Fig. 3, each mobile station apparatus 6-1 to 6-3 includes a radio transceiver unit 21, a modulator / demodulator 22, a page-folding unit 23, and an end interface unit 25. .
In this type of configuration, if an IGMP request message arrives from the IGMP compatible network 4 to the router 3, the router 3 sends an IP packet containing the IGMP request message to the slave device for the base station 2.
If an IP packet is received in the base station apparatus 2 by the network interface unit 15, then a page signal is generated by the page stacking unit by mapping this IP packet to the L-PDU, which is a fixed length packet in the user data channel (UDCH). user data channel).
This page signal is then transmitted to all mobile station devices using IGMP request non-switched connection (DUC-ID # 1), by which it is connected to all mobile station devices 6-1 to 6-3.
After the configured page signal is modulated in the modulator / demodulator 12, it is subjected to various types of transmission processing such as D / A (Digital / Analog) conversion, higher frequency conversion, and gain (gain control) in the radio transmission. / receiver unit 11, and then is transmitted as a radio signal from an antenna.
This transmitted signal is received by the antenna in each mobile station apparatus 6-1 to 6-3, and is sent to the radio transceiver unit 21. In the radio transceiver unit 21, the received signal is subjected to various kinds of reception processing, such as gain (gain control), downconversion, and A / D (Analog / Digital) conversion.
After the signal is subjected to this processing, it is demodulated in the modulator / demodulator 22 and then undergoes page decomposition by the page folding unit 23. In this way, an IP packet is obtained. This packet is transmitted over
-3• * · · · ·
Μ Μ ·· ···· unit for terminal interface 25 to terminal devices 7-1 to
7-3.
When the mobile station apparatus 6-1 to 6-3 receives the IGMP request message contained in the IP packet, a page signal is generated by mapping the IP packet containing the IGMP notification message indicating the multi-task IP address whose reception is requested to a fixed-length L-PDU packet. in UDCH. This page signal is transmitted to the base station apparatus 2 using an IGMP request non-switched connection (DUC-ID # 1), which is the connection to the base station.
After receiving the IGMP notification message, the device for base station 2 sends an IP packet containing the IGMP notification message to the router _3. <sup>and</sup> to mobile station devices 6-1 to 6-3.
However, there is a problem with conventional devices in that in order to map an IP packet containing an IGMP notification message to an L-PDU, which is a fixed length packet in a UDCH, there is a need for a transmission link on a non-switched UDCH used by all mobile station devices 6-1 to 6-3 separately from the normally used UDCH.
To solve this problem, a method is provided in which the connection for IGMP notification is shared by the mobile station apparatus 6-1 to 6-3 by performing random access instead of using a non-switched UDCH. However, in this method, IP packets containing an IGMP request message or an IGMP notification message are also transmitted and received, and therefore information other than that which is actually requested is transmitted and received. This in turn creates the problem of redundancy of information, high costs and uneconomical use of frequency bands.
The essence of the invention
It is an object of the present invention to provide a radio communication system and a multi-tasking communication system that allows efficient use of radio communications
<img file="CZ20020621A3_D0002.tif" />
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99 99,999 communication resources when multitasking communication is performed using IGMP.
This goal is achieved by a radio apparatus which decides whether or not the control procedure information is contained in a variable length packet indicating a destination for communicating with another radio apparatus in a one-to-one or one-to-several mode. and if the result of this decision is that this control information is contained in such a packet, then it maps this control information into a short fixed-length packet, which is shorter than a fixed length packet used in communication with other radio equipment.
Overview of figures in the drawings
Fig. 1 is a block diagram showing a configuration of a conventional mobile communication system;
Fig. 2 is a block diagram showing a configuration of an apparatus for a base station in a conventional mobile communication system;
Giant. 3 is a block diagram showing a configuration of an apparatus for a mobile station in a conventional mobile communication system;
Giant. 4 is a block diagram showing a configuration of a mobile communication system according to an embodiment of the present invention;
Fig. 5 is a block diagram showing a configuration of an apparatus for a base station in a mobile communication system according to the above embodiment; and
Fig. 6 is a block diagram showing a configuration of an apparatus for a mobile station in a mobile communication system according to the above embodiment.
• · · » • « 4 4 4 4
Examples of embodiments of the invention
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 4 is a block diagram showing a configuration of a mobile communication system according to an embodiment of the present invention.
In Fig. 4, a router (IGMP compatible router) 103 is connected to the device for the base station 102, and an IGMP compatible network 104 is connected to the router 103. The group of devices for the mobile stations 106-1 to 106-3 is arranged to be arbitrarily connected to terminal devices, such as communication terminals, 107-1 to 107-3 equipped with computer functions.
As shown in Fig. 5, the base station apparatus 102 includes a radio transceiver unit 201, a modulator / demodulator 202, a page-folding unit 203, and a network interface unit 205.
As shown in a representative case of the mobile station 106-1 in Fig. 6, each apparatus for the mobile station 106-1 to 106-3 includes a radio transceiver unit 301, a modulator / demodulator 302, a page folding unit 303, a processing unit IGMP control messages 304 and an end interface unit 305.
In this type of configuration, when an IGMP request message arrives from the IGMP compatible network 104 to the router 103, the router 103 sends an IP packet containing the IGMP request message to the slave device for the base station 102.
In the base station apparatus 102, the network interface unit 205 receives an IP packet sent from the router 103, and is sent to the page stacking unit 203.
If the IP packet received by the network interface unit 205 is an IP packet containing an IGMP request message, then it is sent to the IGMP control message processing unit 204.
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In the IGMP control message processing unit 204, an IGMP control message is obtained from the IP packet, and only the necessary portion of this control message is mapped into a fixed length short packet (SPDU) to control radio communication between the base station device 102 and the mobile station devices 106- 1 to 106-3. After performing this mapping, the packet is sent to the page stacker 203.
An essential part of the IGMP control message is the part that remains after deleting at least the checksum entry from the IGMP control message obtained from the IP packet. This will now be explained in more precise terms.
Under normal conditions, the IGMP control message is transmitted by being stored in an IP packet. An IP packet consists of a variable-length IP header of at least 32 8-bit syllables and a portion with a variable-length message of at least 4 8-bit syllables. The IGMP control message is stored in the message section. The necessary part is the part that remains after removing the IP header from the IP packet.
The IGMP control message contains 8 8-bit syllables and these specify the necessary part. It is also possible to further reduce this part. The IGMP control message consists of a 1-syllable Type field, a 1-syllable Max Response Time field, a 2-syllable Checksum field, and a 4-syllable Group Address field, but if a control message is transmitted in which S -PDU other than IGMP, then it is usual for the field with the error detection code, such as the Checksum or CRC field, to be provided on the usual rather than on an error-specific basis. Subsequently, it is possible to omit the Checksum field in the IGMP control message. Furthermore, it is also possible to omit the field Max Response Time, provided that this has been ensured in advance by performing the agreed processing by means of transmission / reception.
Further, in the page stacking unit 203, the variable length IP packet is converted from the network interface unit 205 to a fixed length packet (L-PDU), and from this L-PDU and the S-PDU
-ΊΦ ”Φ φ '*'» * φφ φ * φ> φ φ φφφφ φ φφ ΦΦΦΦΦ * · • • / demodulator 202.
The page signal is modulated by the modulator / demodulator 202, and then subjected to various kinds of transmission processing such as D / A conversion, higher frequency conversion, and gain (gain control) in the radio transceiver unit 201, and is transmitted as a radio signal from antennas.
This transmitted signal is received into the radio transceiver unit 301 by the antenna in each mobile station apparatus 106-1 to 106-3. In the radio transmitting / receiving unit 301, the received signal is subjected to various kinds of receiving processing, such as gain (gain control), down-conversion, and A / D conversion.
After the signal is subjected to this processing, it is demodulated in the modulator / demodulator 302. This demodulated signal is subjected to page decomposition by the page folding unit 303 and conversion from a fixed length packet (LPDU) to a variable length packet, and an IP is obtained. package.
Further, a short fixed-length packet (S-PDU) is obtained in the page composing unit 303, and an IP packet containing the IGMP control message is generated in the IGMP control message processing unit 304.
In the end interface unit 305, which receives IP packets from the page compositing unit 303 and the IGMP control message processing unit 304, these IP packets are multiplexed and sent to the end devices I07-I to 1073.
Now, in the event that the end devices 107-1 to 107-3 attempt to participate in a multi-tasking group, when an IGMP request message is received from the mobile station devices 106-1 to 106-3, then it is received via the mobile station devices 106-1. to
106-3, an IGMP notification message is sent to the IP address of the multi-tasking group in which participation is required.
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In the mobile station apparatus 106-1 to 106-3, the IP packet received from the respective terminal 107-1 to 1073 is received by the terminal interface unit 305 and is sent to the page compositing unit 303.
If the IP packet received from the end interface unit 305 is an IP packet containing an IGMP control message, then it is sent to the IGMP control message processing unit 304.
In the IGMP control message processing unit 304, an IGMP control message is obtained from the IP packet and, after being stored in a fixed-length short packet (S-PDU), is sent to the page compositing unit 303.
In the page composing unit 303, the IP packet received from the end interface unit 305 is converted to a fixed length packet (L-PDU), the page signal is composed from the L-PDU and the S-PDU from the IGMP control message processing unit 304, and is sent to modulator / demodulator 302.
The page signal is modulated by the modulator / demodulator 302, and then subjected to various kinds of transmission processing such as D / A conversion, higher frequency conversion, and gain (gain control) in the radio transceiver unit 301, and is transmitted as a radio signal from antennas.
After being received by the antenna of the base station apparatus 102, this received signal is subjected in the radio transmitting / receiving unit 201 to various kinds of receiving processing, such as gain (gain control), down-conversion, and A / D conversion.
After the signal is subjected to this processing, it is demodulated in the modulator / demodulator 202, and is subjected to page decomposition by the page folding unit 203 and conversion from a fixed-length packet (L-PDU) to a variable-length packet, and an IP is obtained. package.
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Further, a short fixed length packet (S-PDU) is obtained in the page composing unit 203, and an IP packet containing the IGMP control message is generated in the IGMP control message processing unit 204.
If the S-PDU received by the IGMP control message processing unit 204 contains an IGMP notification message, then an IP packet containing the IGMP notification message is generated and sent to the network interface unit 205, and this received SPDU is also transmitted to the terminals 107-1 to 107. -3 participants in a multi-tasking group indicated by an IGMP notification message.
In the end interface unit 205, which receives IP packets from the page compositing unit 203 and the IGMP control message processing unit 204, these IP packets are multiplexed and then transmitted to the router 103.
According to the radio communication system in this embodiment, the IGMP control message processing units 204 and 304 map only the necessary part of the terminated IGMP control message into a fixed-length short packet (S-PDU) between the base station device 102 and the mobile station devices 106-1 to 106-3.
Consequently, information other than that actually required is not transmitted or received. That is, the IP header of an IP packet that is not needed in the radio channel is not transmitted or received, and therefore previous redundant information is limited, which allows a proportionate reduction in cost and efficiency in using frequency bands compared to the prior art.
In an IP packet, an IP header that is not required in a radio channel contains at least 24 8-bit syllables, and considering that the number of 8-bit syllables may exceed 40 when using the optional header in addition to the IP header, the effect of the present invention is significant.
In the above embodiment, a mode in which the apparatus for base station 102 performs radio communication has been described
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with mobile station apparatus 106-1 to 106-3, but the present invention is not limited thereto and can also be applied to shared access media access networks comprising a fixed master station and a fixed group of substations such as FTTH and ADSL.
The radio apparatus according to the present invention has a configuration consisting of a unit that decides whether or not the packet communication control information is contained in a variable length packet in which a target for performing communication with radio apparatus in single-mode mode is indicated. one or one-to-several, and a unit which, where the result of this decision is that the control procedure information is contained in this packet, maps this control information to a short fixed-length packet that is shorter than the fixed-length packet used to communicate with other radio devices.
According to this configuration, only the control procedure information is mapped into a short packet containing a small amount of information, and therefore the previous redundancy of information is reduced, which allows a proportionate reduction in cost and efficiency in using frequency bands compared to the prior art.
The radio apparatus according to the present invention, the configuration of which has been mentioned above, has a configuration in which only the necessary part of the control procedure information is mapped into a short packet. According to this configuration, only the necessary part of the control procedure information is mapped into a short packet that contains a small amount of information, which further allows for cost reduction and more efficient use of frequency bands.
The radio apparatus of the present invention in the above configuration has a configuration comprising a unit that maps a variable length packet to a fixed length packet, then generates a page signal from the mapped fixed length packet and from the short packet to which the control procedure information has been mapped. and transmits this page signal.
-11 • · * • * • · · · · f
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According to this configuration, the information to the procedure driver can be transmitted on the communication channel.
The radio apparatus according to the present invention in the above configuration has a configuration comprising a unit that decomposes a page signal and obtains a variable length packet and a short packet, a unit which obtains control procedure information from this short packet and maps it to another variable length packet, and a unit that multiplexes both of these variable length packets. According to this configuration, both the control procedure information and the user information can be multiplexed on the same channel.
The radio apparatus according to the present invention in the above configuration has a configuration in which the control procedure information is IGMP (Internet Group Multicast Protocol) information. According to this configuration, in the case of IGMP information, the same kind of operation result can be obtained as in any of the above cases.
The radio apparatus of the present invention in the above configuration has a configuration where the variable length packet is an IP (Internet Protocol) packet. According to this configuration, the same kind of operation result can be obtained for the IP packet as in any of the above cases.
The mobile station apparatus of the present invention has a configuration in which a radio apparatus of the same configuration as in any of the above cases is provided. According to this configuration, the same kind of operation result as in any of the above cases can be obtained in the mobile station apparatus.
The base station apparatus of the present invention has a configuration in which a radio apparatus of the same configuration as in any of the above cases is provided. According to this configuration, there may be ·· 0000 in the device
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0000 0000 0
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000 ··« 00 »· 0» 00·«
-12 base station achieved the same kind of operating result as in any of the above cases.
The radio communication system according to the present invention is equipped with a mobile station apparatus and a base station apparatus of the above configuration, and has a configuration in which one station apparatus of the above mobile station apparatus and the above base station apparatus performs radio resource assignment. According to this configuration, the radio resource assignment function is not maintained on a fixed basis by one radio station device (e.g. a base station device), but instead the position of the radio resource assignment function can be changed based on the current situation.
The radio communication system of the present invention has a configuration in which a radio apparatus of the same configuration as any of the above is provided and a communication network apparatus that transmits and receives variable length packets through the radio apparatus and the router. According to this configuration, the same kind of operating result as in any of the above cases can be obtained in the radio communication apparatus.
When communication between radio devices is performed in a one-to-one or one-to-several mode in the multi-task communication method according to the present invention, then in the case of packet communication control control information contained in a variable length packet in which the destination for performing this communication is indicated, the radio device transmits this information of the control procedure after it is mapped into a short packet with a fixed length, shorter, than a fixed-length packet used to communicate with other radio equipment.
According to this method, only the control procedure information is mapped into a short packet containing a small amount of information, thus reducing the previous redundancy of information, which allows a corresponding reduction in costs and
-139 * 9 9 9 9 «9 99 99 9999 improving the efficiency of the use of frequency bands compared to the current state.
In the multi-task communication method of the present invention, in the above embodiment, a variable length packet is mapped to a fixed length packet, and a page signal is assembled from this mapped fixed length packet and a short packet into which control procedure information has been mapped, and this is broadcast. According to this method, control procedure information can be transmitted on a communication channel.
In the multi-task communication method of the present invention, in the above embodiment, a variable length packet and a short packet are obtained from the page signal, control procedure information is obtained from this short packet and mapped to another variable length packet, and then both variable length packets are obtained. length multiplexed. According to this method, both the control procedure information and the user information can be multiplexed on the same channel.
As described above, according to the present invention, radio communication resources can be used more efficiently when multitasking communication using IGMP is performed.
This application is based on Japanese Patent Application No. 2000-189592 filed June 23, 2000, the entire contents of which are expressly incorporated herein by reference.
Industrial applicability
The present invention is applicable to a radio communication system and a multi-tasking communication system that performs multi-tasking communication (one-to-several communication) using IP between a base station apparatus and a group of mobile station apparatus such as mobile telephones in a digital mobile communication system.
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PATENT CLAIMS
8 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8
16 members in 10 offices
Priority claims1
| Document | Office | Kind | Date |
|---|---|---|---|
| 2000189592 | Japan | A |
Members16
| Document | Office | Kind | |
|---|---|---|---|
| CA2382595A1 | Canada | A1 | |
| WO0199356A1 | World Intellectual Property Organization (WIPO) | A1 | |
| AU7460301A | Australia | A | |
| JP2002009767A | Japan | A | |
| KR20020027566A | Republic of Korea | A | |
| BR0106884A | Brazil | A | |
| EP1204252A1 | European Patent Office (EPO) | A1 | |
| CZ2002621A3This record | Czechia | A3 | |
| US2002114351A1 | United States of America | A1 | |
| CN1383653A | China | A | |
| KR100435797B1 | Republic of Korea | B1 | |
| CN1157985C | China | C | |
| CN1551582A | China | A | |
| US7161958B2 | United States of America | B2 | |
| CN1309226C | China | C | |
| EP1204252A4 | European Patent Office (EPO) | A4 |
Numbers
- Application
- 2002621
Titles2
- Czech
- Radiový komunikační systém a způsob víceúlohové komunikace
- English
- Radio communication system and method for multitask communication
Classification
- CPC, 10
- H04L12/185
- H04W4/06
- H04L12/189
- H04W4/00
- H04W28/06
- H04L69/16
- H04L69/161
- H04L12/18
- H04L47/36
- H04L9/40
- IPC, 8
- H04L12 18
- H04L12 40
- H04L45 16
- H04L47 43
- H04W4 00
- H04W24 00
- H04W28 06
- H04W84 12