Multicast and broadcast service resource management method and device

Multicast and broadcast service resource management method and apparatus

p01The present invention relates to a multicast and broadcast service (multicast and broadcast service, MBS) resource management method and apparatus.

p02MBS is a point-to-multipoint (point-to-multipoint) transmission method for transmitting a data packet at the same time to a plurality of destination (destination) from a single source (source). Broadcast service refers to a service for transmitting to all users, a multicast service refers to a service for transmitting to a user in a particular group.

p03In order to support the MBS, a downlink resource (that is, the DL frame) is divided into a multicast area for unicast (unicast) and the MBS zone. Dividing the subbands within one subframe hayeoseo allocates a sub-band logical resource unit (subband logical resource unit, SLRU) form a region and the unicast area of ​​each MBS zone.

p04At this time, the base station itself to the terminal how the sphere so as to properly receive the corresponding service distinction, the time the area is distinguished, it is necessary to transfer the information such as the area of ​​the change when the change to the terminal.

<p num="p05">The present invention to solve this problem is to provide the MBS resource management method and apparatus that distinguishes the information region of the downlink resource in the case of supporting the MBS can be provided efficiently to the MS.</p>

<p num="p06">According to one aspect of the invention, there is provided a resource management method of the MBS terminal. The MBS resource management method, a plurality of areas divided is that sub-band of the region allocation information includes the system configuration descriptor (system configuration descriptor, SCD) messages received that step, MBS operate for setting information with the validity period to include receiving an MBS setup message, receiving the area allocating information is received the changed SCD message, the new MBS setup message after the validity period of the MBS setup message at receiving the changed SCD message time has expired, a step, and the step of applying the changed region allocation information from the start time of the new first set MBS MBS scheduling period (MBS scheduling interval, MSI) message that includes.</p><p num="p07">In this case, the plurality of areas may include an area for the unicast area and for at least one MBS zone.</p><p num="p08">The SCD message may include a flag to indicate that it includes an area for the plurality of areas the uni-cast the more.</p><p num="p09">The SCD message may further include a counter that is incremented when a change, the contents of the SCD Message.</p><p num="p10">The MBS resource management method, based on the counter of the SCD Message may further include a step to determine the change in the allocation region information.</p><p num="p11">The method comprising: receiving a new MBS setup message may receive the new MBS setup message at the time specified by the valid period.</p><p num="p12">The area allocation information may include a bit map composed of bits having a value of "1" in the area is different when matching the two adjacent subbands.</p><p num="p13">The MSI comprises a plurality of super frames, the SCD message may further include information about the length of the MSI.</p><p num="p14">According to another feature of the invention, there is provided a resource management method of a base station MBS. The MBS resource management method, wherein the MBS setup message containing the transmitting SCD message including an area assigned to information of the sub-band is divided into a plurality of areas to the terminal, and setting information for the MBS operating lifetime terminal step of periodically sent to the, in the case where the region allocation information is changed, sending the SCD message including the changed region allocation information to the mobile station, and wherein the validity period at the time the region allocation information has been changed expiration after that, a step of applying the changed region allocation information at the beginning of the first set of the MBS MSI message.</p><p num="p15">In this case, the plurality of areas may include an area for the unicast area and for at least one MBS zone.</p><p num="p16">The SCD message may include a flag to indicate that it includes an area for the plurality of areas the uni-cast the more.</p><p num="p17">The SCD message may further include a counter that is incremented when a change, the contents of the SCD Message.</p><p num="p18">The area allocation information may include a bit map composed of bits having a value of "1" in the area is different when matching the two adjacent subbands.</p><p num="p19">The MSI comprises a plurality of super frames, the SCD message may further include information about the length of the MSI.</p><p num="p20">According to another feature of the invention, there is provided a resource management equipment in the terminal MBS. The MBS resource management apparatus comprises a receiving unit and control unit. The receiver receives the MBS setup message including the setting information and the validity period for the SCD receives a message including the information of the area allocated subbands that are divided into a plurality of areas periodically and, MBS operation. The control unit applies the changed region allocation information at the beginning of the next MSI point of the MBS region setting message if the assignment of the SCD Message information is changed, after the period of validity of the current MBS setup message expires.</p><p num="p21">In this case, the plurality of areas may include an area for the unicast area and for at least one MBS zone.</p><p num="p22">The SCD message further comprises a counter which is increased if this content of the SCD message changes, the control unit on the basis of the counter of the SCD message can confirm the change of the zone allocation information.</p><p num="p23">According to another feature of the invention, there is provided a resource management unit of the base station MBS. The MBS resource management apparatus comprises a transmission unit and a control unit. Wherein the transmitter periodically MBS setup message including the setting information and the validity period for periodically sent to the SCD message to the terminal and, MBS operations, including the area allocation information of the sub-band is divided into a plurality of areas to the terminal transfers. The control unit applies to the case in the region allocation information is changed, the changed region allocation information from the first starting point of the MSI message of next MBS set after the validity period of the current MBS setup message expires.</p><p num="p24">In this case, the plurality of areas may include an area for the unicast area and for at least one MBS zone.</p><p num="p25">The SCD message may further include a counter that is incremented when a change, the contents of the SCD Message.</p>

<p num="p26">The base station and the terminal according to one embodiment of the present invention can be applied to the modified subband region allocation information at the right time. In the case of the terminal for receiving data to the unicast, the terminal is able to accurately synchronize the time of the change area to the area with a base station allocating a channel to a unicast measurements.</p>

p271 is a flow chart of MBS supporting method according to one embodiment of the invention.

p282 is a view showing an SCD message according to one embodiment of the invention.

p293 and 4 are diagrams showing an example of area assignment in the downlink resource, respectively.

p305 is a diagram showing the changes of the area allocated for the downlink resource.

p316 is a view showing the application timing of the changed SCD message.

p32Figure 7 is a schematic block diagram of the MBS management resources of the UE according to one embodiment of the invention.

p33Figure 8 is a schematic block diagram of a MBS resource management equipment of a base station according to one embodiment of the present invention.

p34In the following with reference to the accompanying drawings will be described in detail to be easily carried out by those of ordinary skill in the art with respect to the embodiment of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. And the part not related to the description in order to clearly describe the present invention in the attached drawings like reference numbers refer to similar parts throughout the specification.

p35Specification from the terminal (terminal) is a mobile terminal (mobile terminal, MT), the mobile station (mobile station, MS), a subscriber station (subscriber station, SS), a mobile subscriber station (portable subscriber station, PSS), access terminals (access terminal, AT), and the like also refer to a user equipment (user equipment, UE), it may include all or some of the features, such as MT, MS, SS, PSS, AT, UE.

p36In addition, the base station (base station, BS) is a node B (node ​​B), Enhanced Node B (evolved node B, eNodeB), access point (access point, AP), a wireless access station (radio access station, RAS), a base transceiver station (base transceiver station, BTS), MMR (mobile multihop relay)-BS, such as the referred to may or may, node B, eNodeB, AP, RAS, BTS, MMR-BS, etc. of all or part of the functionality included to be there.

p371 is a flow diagram of MBS supporting method according to one embodiment of the invention, Figure 2 is a diagram showing a system configuration descriptor (system configuration descriptor, SCD) message according to one embodiment of the invention.

p38Referring to FIG. 1, the base station periodically sends information about the system configuration to the terminal to define the system configuration (system configuration) (S110). System configuration information may be transmitted via the SCD Message.

p39Referring to FIG 2, the contents of the SCD message assigned area indicating the area allocation information of the sub-band bit-map (Zone_Allocation-Bit-MAP), the area flag that indicates whether the last region is used as a unicast (ZF) and SCD message includes a configuration change counter (configuration change Count) indicates whether the change. Configuration change counter is incremented whenever the contents of the SCD Message.

p40Referring back to FIG. 1, if you wish to the terminal receiving the MBS, it transmits the information on the MBS mode it supports to the base station and the base station information on the MBS mode it supports from the MBS mode, which terminal is supported and it transmits to the terminal (S120). Through such a procedure, the BS and the MS exchange is performed for the MBS performance (capability). At this time, the MS network entry or are re-entry when to transmit MBS mode information using a registration request (registration request, REQ-REQ) message for a registration request to the base station a response message for the REG-REQ message (registration response, you can use the REG-RSP) message to send the MBS mode information.

p41Next, the base station transmits a connection establishment request message for the MBS connection setup to the UE, and the UE transmits a response message about this to the base station (S130). At this time, connection setup request message to the dynamic service addition request (dynamic service addition request, DSA-REQ) message to be used can be, and connection setup request message in response, a message to a dynamic service addition response (dynamic service addition response, DSA-RSP) messages may be used. On the other hand, the UE may start the MBS connection setup request, in which case the terminal and transmits the DSA-REQ message to the base station, the base station can transmit a DSA-RSP message to the MS.

p42The base station acquires the MBS MBS setting information set (MBS configuration, MBS-CFG) message transmitted periodically and, the terminal receives an MBS-CFG hayeoseo message to the MBS reception (S140). The UE acquires the MBS MAP on the basis of the setting information and receive MBS service from a base station to a MBS (S150), based on the information of the MBS MAP (S160).

p43At this time, MBS-CFG messages may be transmitted every 32 super frames, for example, be transmitted in the super frame that satisfies the equation (1). And MBS-CFG message MBS setting information to the MBS zone for each MBS zone identifier (MBS Zone ID), the MBS zone identifier to the application that MBS MAP of the resource information, MBS MAP burst size information, neighboring MBS zone identifier (Neighbor MBS Zone ID), and MBS zone neighboring the serving MBS between the current MBS zone identifier (ID MBS) and the flow identifier (flow ID, FID) and including the mapping information of the new MBS ID and FID. Here, the resource information of the MBS MAP may be in the MBS zone resource index (MBS MAP Resource Index) indicating the position and the allocation size of the MBS MAP resources in a sub-band domain assigned to the burst size information of the MBS MAP is the MBS MAP offset used to compute burst size (MBS MAP I_SizeOffset) It can be. MBS and ID is an identifier that is assigned to the UE to receive the MBS service, FID is the identifier assigned to the MBS connection is present in the ID paired with MBS. MBS-CFG message also includes a validity period (lifetime) that indicates a time period that does not change the setting information further MBS. And the validity period is specified, a time when the UE receives an MBS-CFG hayeoseo decoded message, not counting down.

p44Equation 1

p45N_superframe modulo 32 == 31

p46This terminal hayeoseo decoding the MBS-CFG message hayeoseo check the information on the MBS MAP corresponding to the MBS zone to which it belongs and receives the MBS MAP. The UE does not re-decoding the MBS-CFG messages until the time specified by the lifetime of the MBS-CFG message decoding, and decodes the MBS-CFG receives messages back from the time. For example, if the MBS-CFG validity period m of the message, the UE can re-decode the MBS-CFG champignon when in the super frame that satisfies the condition of equation (2).

p47Equation 2

p48N_superframe modulo (32 × (m + 1)) == 32 × (m + 1) -1

p49Here, N_superframeIs a super-frame number.

p503 and 4 are diagrams showing an example of assigned capacity of the downlink resource.

p51Referring to Figure 3, the subband domain in the DL frame is divided, each region is assigned to the corresponding MBS zone (Zone # MBS 1, MBS Zone # 2) that. And if that requires a unicast resource area is contained in the final sub-bands are allocated to unicast.

p52For example, sub-band of 10 pieces divided be the first from fifth sub-band, the first MBS zone (MBS Zone # 1) on the allocation and the sixth from eighth sub-band, the second MBS zone (MBS Zone # 2) to If allocation is allocated to the tenth subband unicast from the ninth, and can be set to have "000 010 010" as a region allocation bitmap (Zone_Allocation-bit-mAP) shown in Fig. That is, the total number of bits of the area assigned the bitmap set to 1 in the number of total subbands in the minus value, and the i-th unit station and the (i + 1) th sub-band belongs to the other region of the bit to "1" and setting, when the i-th unit in the station and the (i + 1) th sub-band is the same region may set the corresponding bit to "0".

p53And, as in the example 3 and 4, it may be set to a value indicating that the final bag if the zones are assigned to the unicast, the unicast area of ​​the flag (ZF of Figure 2) SDU message is assigned.

p54Next with reference to FIGS. 5 and 6 will be described in detail MBS resource management method according to an embodiment of the present invention.

p55Figure 5 is a view showing a change in the allocation region of a DL resource, Figure 6 is a view showing the application timing of the changed SCD message.

p56The base station may change the allocated subband in the downlink resource. For example, as shown in Figure 5, the first first MBS second is from the third subband zone (MBS Zone # 1) is assigned, and the fifth sub-band, the second MBS zone from the fourth to the (MBS Zone # 2) assigned and may be changed as in the example of the seventh sub-band, the third MBS zone (MBS zone # 3) is assigned, and 3 and in the state allocated to the unicast tenth subband from eighth to 4 from the sixth .

p57The base station then updated with the contents, that is allocated subbands bit map allocation information of a changed region SCD message, and transmits the updated SCD message. The base station to indicate the update of the SCD message, by increasing the value of the configuration change of the counter SCD Message 1 transmits a message SCD.

p58Existing sub-bands allocated terminal based on information received unicast data or MBS after receiving the modified SCD message first MBS scheduling interval (MBS Scheduling Interval, MSI) start time (s) since changed Forces Station area hayeoseo based on the assignment information receives the unicast data or MBS.

p59Here, MSI is made up of a plurality of super-frames that are continuous in the interval at which the MBS traffic scheduling, MSI MSI is made of a length that indicates whether the number of the super frame (N_MSI) It may be transmitted through the SCD Message. And MSI may be started in a super frame (SF) that satisfies the equation (3).

p60[Equation 3]

p61N_superframe modulo N_MSI == 0

p62And Referring to FIGS. 5 and 6, the first MSI that applies a sub-band allocation information of a changed region SCD message in the first period of the next MSI in the effective MBS-CFG message. That is, the UE at the time of receiving the message has not been altered SCD expired MBS-CFG message receiving MBS from the base station based on the information of the MBS MAP message confirming through the current MBS-CFG. And if the validity of the conventional MBS-CFG message expires, the UE applies the new MBS-CFG start of the first MSI within the validity time of the message (s) in the subband domain of a modified SCD message allocation information. Terminal receives the MBS MBS based on the setting information of the area allocated subband information and the new MBS-CFG message of the changed SCD message.

p63According to one embodiment of the present invention in this way, even if the SCD Message changed terminal when the conventional MBS-CFG If before the validity period of the message expires, in accordance with conventional MBS setting information receiving MBS and expired changed SCD It can be, depending on the message and the new MBS-CFG message MBS MBS receiving setting information, the base station and the terminal may apply the modified subband region allocation information at the right time.

p64In the case of the terminal for receiving data to the unicast, until the time the application is changed SCD message and measures the channel status for the unicast area on the basis of the conventional sub-band region allocation information. Since the time the application is changed SCD Message hayeoseo measure the channel state for the unicast area based on the modified subband region allocation information can be fed back to the base station the measured channel information. Therefore, the terminal can be accurately synchronized with the base station changes an area of ​​a time zone allocated to the unicast channel to measure.

p65On the other hand, since the terminal unlike the embodiment of the invention, when confirmed that through the change even before the validity period of the conventional MBS-CFG message expiration configuration counter SCD message changed, without waiting for the time when the validity period expires, You may receive the MBS-CFG messages transmitted to apply the setting information of the MBS region allocation information and subband MBS-CFG message of the new SCD message. In this way it is possible to minimize the delay time of the application of the modified SCD message.

p66Next will be described with to FIG. 7 and with respect to MBS resource management device 8 to perform the MBS setting information management method according to an embodiment of the present invention by reference.

p67Figure 7 is a block diagram of the terminal of the MBS resource management according to an exemplary embodiment of the present invention, Figure 8 is a block diagram of MBS resource management equipment of a base station according to one embodiment of the present invention.

p68Referring to Figure 7, MBS resource management unit 700 of the terminal comprises a receiving unit 710 and the control unit 720.

p69Receiver 710 decodes the received the MBS-CFG messages and SCD message transmitted from the base station, the control unit 720, a receiving unit 710, the MBS-CFG messages transmitted at the time specified by the lifetime of the MBS-CFG Message a control to decode. The controller 720 then if the basis of the counter of the SCD message confirming that the content of the SCD message changed, the validity of the MBS-CFG messages expire at the start of the first MSI make the changes to contents of the SCD Message .

p70Referring to Figure 8, the MBS resource management unit 800 of the base station includes a control section 810 and transmission section 820.

p71Thereby the controller 810 is configured to increase the counter in the SCD system messages in the case where the MBS-CFG configuration message and transmit the message to the terminal SCD, and the change area information of the allocated subband. Also the control unit 810 applies the changes to the after the lifetime of the MBS-CFG message if the contents of the changed expiration SCD SCD message at the beginning of the first message MSI. The transmitter 820 transmits the MBS-CFG messages and SCD message to the UE periodically.

p72Has been described in detail with respect to embodiments of the present invention at least the scope of the present invention is limited to not many variations and modifications in the form of one of ordinary skill in the art using the basic concept of the invention as defined in the following claims In addition, the present invention It will belong to the scope of right.