JP2011139519A - Mobile communication system, relay node, radio base station and gateway device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately map an E-RAB, a Uu radio bearer, a Un radio bearer and an S1 bearer. <P>SOLUTION: In the mobile communication system, each of Uu radio bearers for a predetermined QoS among a plurality of Uu radio bearers set between a plurality of mobile stations UE and a relay node RN is constituted to be mapped to a Un radio bearer for the predetermined QoS where each of the Uu radio bearers is set for each of the different mobile stations UE, and the Un radio bearer is set between the relay node RN and a radio base station DeNB. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication system, a relay node, a radio base station, and a gateway device.

  In an LTE-Advanced mobile communication system that is a successor to the LTE system, a “relay node (Relay Node) having a function similar to that of the radio base station DeNB between the mobile station UE and the radio base station DeNB. RN "can be connected.

  As shown in FIG. 1, in the LTE-Advanced mobile communication system, an E-RAB (E-UTRAN) is used as a U-plane bearer between a mobile station UE and a gateway device S-GW (Serving-Gateway). Radio Access Bearer (bearer for mobile station UE) is set, Uu radio bearer (first radio bearer) is set between mobile station UE and relay node RN, and relay node RN and radio base station DeNB An Un radio bearer (second radio bearer) is set in between, and an S1 bearer is configured between the radio base station DeNB and the gateway device S-GW.

3GPP TS 36.300 (V8.8.0), “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Network 9 H 3GPP TR36.814 (V1.0.0), “Further Advancements for E-UTRA Physical Layer Aspects”, February 2009

  However, at the present time, there is a problem in the LTE-Advanced mobile communication system that it is not defined how to map the E-RAB, Uu radio bearer, Un radio bearer, and S1 bearer.

  Therefore, the present invention has been made in view of the above problems, and a mobile communication system, a relay node, and a radio base capable of appropriately mapping an E-RAB, a Uu radio bearer, an Un radio bearer, and an S1 bearer An object is to provide a station and a gateway device.

  A first feature of the present invention is a mobile communication system including a plurality of mobile stations, a relay node, and a radio base station, and the plurality of mobile stations set between the plurality of mobile stations and the relay node. Among the first radio bearers of the predetermined QoS set for different mobile stations, the second radio bearer for the predetermined QoS set between the relay node and the radio base station. The gist is that it is configured to map to a radio bearer.

  A second feature of the present invention is a relay node, for a predetermined QoS set for a different mobile station among a plurality of first radio bearers set between a plurality of mobile stations and the relay node. A mapping processing unit configured to map each of the first radio bearers to the second radio bearer for the predetermined QoS set between the relay node and the radio base station, and the predetermined QoS Based on the priority assigned to each of the first radio bearers for use, the uplink user data received via each of the first radio bearers for the given QoS to the second radio bearer for the given QoS And a priority control processing unit configured to perform a priority control process for the multiplexing process.

  A third feature of the present invention is a radio base station, and among a plurality of bearers set between the radio base station and a gateway device, a predetermined QoS bearer set for a different mobile station is provided. A mapping processing unit configured to map each to a radio bearer for the predetermined QoS set between a relay node and the radio base station, and assigned to each of the bearers for the predetermined QoS Priority control configured to perform priority control processing for multiplexing processing of downlink user data received via each of the predetermined QoS bearers to the predetermined QoS radio bearer based on the priority level And a processing unit.

  A fourth feature of the present invention is a gateway device for a relay node, for a predetermined QoS set for a different mobile station among a plurality of bearers set between a radio base station and the gateway device. To each of the predetermined QoS bearers when configured to be mapped to the radio bearer for the predetermined QoS set between the relay node and the radio base station. And a priority control processing unit configured to perform priority control processing for transmission processing of downlink user data via each of the predetermined QoS bearers based on the assigned priority. And

  As described above, according to the present invention, it is possible to provide a mobile communication system, a relay node, a radio base station, and a gateway device that can appropriately map an E-RAB, a Uu radio bearer, an Un radio bearer, and an S1 bearer. can do.

1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. It is a figure for demonstrating the Uu radio bearer and Un radio bearer which are set in the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the Uu radio bearer and Un radio bearer which are set in the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the priority control process for every UE performed within the mobile communication system which concerns on the 1st Embodiment of this invention.

(Mobile communication system according to the first embodiment of the present invention)
A mobile communication system according to a first embodiment of the present invention will be described with reference to FIGS.

  The mobile communication system according to the first embodiment of the present invention is an LTE-Advanced mobile communication system, as shown in FIG. 1, as a U-plane bearer, between a mobile station UE and an exchange MME. Then, E-RAB is set, Uu radio bearer is set in the first radio section between the mobile station UE and the relay node RN, and in the second radio section between the relay node RN and the radio base station DeNB. An Un radio bearer is set, and an S1 bearer is set between the radio base station DeNB and the gateway device S-GW.

  Specifically, the mobile communication system according to the present embodiment is configured such that E-RAB, Uu radio bearer, Un radio bearer, and S1 bearer are mapped as shown in FIG.

  Specifically, as illustrated in FIG. 3, in the mobile communication system according to the present embodiment, the mapping processing unit of the relay node RN is between the plurality of mobile stations UE # 0 to UE # n and the relay node RN. Among a plurality of Uu radio bearers to be set, each of Uu radio bearers for a predetermined QoS set for different mobile stations UE is used for a predetermined QoS set between the relay node RN and the radio base station DeNB. It is configured to map to Un radio bearers X to Z.

  For example, as shown in FIG. 3, the Uu radio bearer A0 for QoS # 0 set for the mobile station UE # 0 and the Uu radio bearer B0 for QoS # 0 set for the mobile station UE # n. Is mapped to the Un radio bearer X for QoS # 0.

  Here, the Uu radio bearer A0 for QoS # 0 that is set for the mobile station UE # 0 includes the identification information (CRNTI (UE # 0)) of the mobile station UE # 0 and the mobile station UE in the first radio section. It is configured to be specified by the identification information (E-RAB # 0) of the E-RAB of # 0 and the identification information (DRB # 0) of the Uu radio bearer, and is set for the mobile station UE # n The Uu radio bearer B0 for QoS # 0 includes the identification information (CRNTI (UE # n)) of the mobile station UE # n and the identification information (E-RAB) of the E-RAB of the mobile station UE # n in the first radio section. # 0) and Uu radio bearer identification information (DRB # 0).

  Further, the Un radio bearer X for QoS # 0 includes the identification information (CRNTI (RN)) of the relay node RN, the identification information of the E-RAB (E-RAB # 0) in the second radio section, and the identification of the Un radio bearer. It is configured to be specified by information (DRB # 0).

  Similarly, in the example of FIG. 3, the Uu radio bearer A1 for QoS # 1 set for the mobile station UE # 0 and the Uu radio bearer B1 for QoS # 1 set for the mobile station UE # n. Are mapped to the Un radio bearer Y for QoS # 1.

  Here, the Uu radio bearer A1 for QoS # 1 that is set for the mobile station UE # 0 includes the identification information (CRNTI (UE # 0)) of the mobile station UE # 0 and the mobile station UE in the first radio section. # 0 E-RAB identification information (E-RAB # 1) and Uu radio bearer identification information (DRB # 1) are configured to be specified and configured for mobile station UE # n The Uu radio bearer B1 for QoS # 1 includes the identification information (CRNTI (UE # n)) of the mobile station UE # n and the identification information (E-RAB) of the E-RAB of the mobile station UE # n in the first radio section. # 1) and Uu radio bearer identification information (DRB # 1).

  Further, the Un radio bearer Y for QoS # 1 includes the identification information (CRNTI (RN)) of the relay node RN, the identification information (E-RAB # 1) of the E-RAB in the second radio section, and the identification of the Un radio bearer. It is configured to be specified by the information (DRB # 1).

  Furthermore, in the example of FIG. 3, the Uu radio bearer A2 for QoS # 2 set for the mobile station UE # 0 and the Uu radio bearer B2 for QoS # 2 set for the mobile station UE # n , And is configured to be mapped to the Un radio bearer Z for QoS # 2.

  Here, the Uu radio bearer A2 for QoS # 2 set for the mobile station UE # 0 includes the identification information (CRNTI (UE # 0)) of the mobile station UE # 0 and the mobile station UE in the first radio section. It is configured to be specified by the identification information (E-RAB # 2) of the E-RAB of # 0 and the identification information (DRB # 2) of the Uu radio bearer, and is set for the mobile station UE # n The Uu radio bearer B2 for QoS # 2 includes identification information (CRNTI (UE # n)) of the mobile station UE # n and identification information (E-RAB) of the E-RAB of the mobile station UE # n in the first radio section. # 2) and identification information (DRB # 2) of the Uu radio bearer.

  Further, the Un radio bearer Z for QoS # 2 includes identification information (CRNTI (RN)) of the relay node RN, identification information of E-RAB (E-RAB # 2) in the second radio section, and identification of the Un radio bearer. It is configured to be specified by the information (DRB # 2).

  Specifically, the mapping processing unit of the relay node RN is configured to perform the above-described mapping by managing the UE context as illustrated in FIG.

  As shown in FIG. 3, in the mobile communication system according to the present embodiment, the mapping processing unit of the radio base station DeNB includes a plurality of S1 bearers set between the radio base station DeNB and the gateway device S-GW. Among them, each of the predetermined QoS S1 bearers set for different mobile stations UE # 0 to UE # n may be configured to be mapped to the predetermined QoS Un radio bearers X to Z.

  For example, as shown in FIG. 3, the S1 bearer for QoS # 0 set for the mobile station UE # 0 and the S1 bearer for QoS # 0 set for the mobile station UE # n are the Un radio bearer X To be mapped to.

  Here, the S1 bearer for QoS # 0 set for the mobile station UE # 0 is configured to be specified by the TEID # 0, and is for QoS # 0 set for the mobile station UE # n. The S1 bearer is configured to be identified by TEID # 3.

  Similarly, the S1 bearer for QoS # 1 set for the mobile station UE # 0 and the S1 bearer for QoS # 1 set for the mobile station UE # n are mapped to the Un radio bearer Y. It is configured.

  Here, the S1 bearer for QoS # 1 set for the mobile station UE # 0 is configured to be specified by TEID # 1, and is for QoS # 1 set for the mobile station UE # n. The S1 bearer is configured to be specified by TEID # 4.

  Further, the S1 bearer for QoS # 2 set for the mobile station UE # 0 and the S1 bearer for QoS # 2 set for the mobile station UE # n are configured to be mapped to the Un radio bearer Z. Has been.

  Here, the S1 bearer for QoS # 2 set for the mobile station UE # 0 is configured to be specified by the TEID # 2, and is for QoS # 2 set for the mobile station UE # n. The S1 bearer is configured to be specified by TEID # 5.

  Specifically, the mapping processing unit of the radio base station DeNB is configured to perform the above-described mapping by managing the UE context as illustrated in FIG.

  In addition, as illustrated in FIG. 4, the radio base station DeNB includes a MAC (Media Access Control) layer function, an RLC (Radio Link Control) layer function that is an upper layer function of the MAC layer function, and an upper layer of the RLC layer function. It has a certain PDCP (Packet Data Convergence Protocol) layer function.

  The PDCP layer function is configured to perform ROHC (Robust Header Compression) processing and security processing on downlink user data transmitted to the Un radio bearer.

  In addition, the PDCP layer function performs ROHC (Robust Header Compression) processing and security processing on downlink user data transmitted to a radio bearer for a mobile station connected to the radio base station DeNB. It is configured.

  The RLC layer function is configured to perform segmentation processing, ARQ (Automatic Repeat Request) processing, and the like on downlink user data transmitted to the Un radio bearer.

  In addition, the RLC layer function is configured to perform segmentation processing, ARQ processing, and the like on downlink user data transmitted to a radio bearer for a mobile station connected to the radio base station DeNB. Yes.

  The MAC layer function is configured to perform scheduling processing, priority control processing, HARQ (Hybrid-ARQ) processing, and the like on downlink user data transmitted to the Un radio bearer.

  In addition, the MAC layer function performs scheduling processing, priority control processing, multiplexing processing, and HARQ processing on downlink user data transmitted to a radio bearer for a mobile station connected to the radio base station DeNB. Configured to do.

  Here, the priority control processing unit provided in the MAC layer function receives the downlink received through each of the S1 bearers for the predetermined QoS based on the priority assigned to each of the S1 bearers for the predetermined QoS. You may be comprised so that the priority control process (priority control process for every UE) with respect to the multiplexing process to the Un radio bearer for predetermined | prescribed QoS of user data may be performed.

  The priority control process (priority control process for each UE) is configured to be performed in a priority control processing unit provided in a higher layer function of the PDCP layer function of the radio base station DeNB, as shown in FIG. May be.

  Specifically, the priority control processing unit sets “ARP (Allocation and Retention Priority)” for each S1 bearer based on the contract information of each mobile station UE, and the same Un radio bearer. On the other hand, downlink user data received via an S1 bearer having a high “ARP priority” is preferentially multiplexed.

  In the example of FIG. 6, the priority control processing unit transmits the downlink user data for the mobile station UE # 0 received via the S1 bearer (TEID # 0) in which “ARP priority: 1” is set to “ The ARP priority is configured to be multiplexed on the Un radio bearer X in preference to the downlink user data for the mobile station UE # n received via the S1 bearer (TEID # 3) in which “10” is set. ing.

  Here, as shown in FIG. 7, the mobile station UE # 1 and UE # 2 belonging to the same group may be configured to be assigned the IP address of the same network Prefix.

  Alternatively, the mobile stations UE # 1 and UE # 2 belonging to the same group are configured to be assigned a SPID (Subscriber Profile ID for RAT / Frequency Priority) having the same predetermined number of upper bits or lower bits. May be.

  Or you may be comprised so that the predetermined number of the high-order bits or the low-order bits of TEID which can identify S1 bearer set up for the mobile stations UE # 1 and UE # 2 belonging to the same group will be the same.

  In the example of FIG. 7, the same “ARP priority: 1” is set for the mobile stations UE ## 0 and UE # 1 belonging to the same group and the mobile station UE # 2 not belonging to any group. Therefore, the priority control processing unit transmits the downlink user data addressed to the mobile stations UE # 0 and UE # 1 in which “SPID: 5” is set to the mobile station UE # in which “SPID: 10” is set. 2 is configured to be multiplexed on the Un radio bearer Z with priority over the downlink user data addressed to 2.

  As shown in FIG. 8, in the mobile communication system according to the present embodiment, the gateway device S-GW includes a gateway device for each mobile station UE (UE S-GW) and a gateway device for the relay node RN. (The P / S-GW for RN) and the S1 bearer for the predetermined QoS may be configured to be set between the relay node RN and the P / S-GW for RN. .

  In such a case, the above-described priority control processing (priority control processing for each UE) is performed in the priority control processing unit provided in the upper layer function of the PDCP layer function of the P / S-GW for RN, as shown in FIG. It may be configured to be performed.

  Here, the priority control processing unit is configured to preferentially tunnel and transmit downlink user data to the S1 bearer having a high “ARP priority” with respect to the same Un radio bearer.

  Further, as shown in FIG. 9, in the mobile communication system according to the present embodiment, the above-described priority control processing (priority control processing for each UE) is an upper layer function of the PDCP layer function of the P / S-GW for RN. It may be configured to be performed in both the priority control processing unit provided and the priority control processing unit provided in the higher layer function of the PDCP layer function of the radio base station DeNB.

  Also, as shown in FIG. 10, the priority control processing unit of the relay node RN passes through each of the Uu radio bearers for the predetermined QoS based on the priority assigned to each of the Uu radio bearers for the predetermined QoS. Thus, it is configured to perform a priority control process for multiplexing the uplink user data received to the Un radio bearer for a predetermined QoS.

  As shown in Type 1 of FIG. 10, the priority control processing unit receives the mobile station UE received via the Uu radio bearer # A0 (C-RNTI (UE # 0), DRB # 0, E-RAB # 0). From uplink user data for mobile station UE # n received via Uu radio bearer # B0 (C-RNTI (UE # n), DRB # 0, E-RAB # 0) May be preferentially multiplexed with the Un radio bearer X.

  Alternatively, as shown in type 2 of FIG. 10, the priority control processing unit receives the movement received via the Uu radio bearer # B2 (C-RNTI (UE # 1), DRB # 2, E-RAB # 2). Uplink user data for station UE # 1 and uplink user data for mobile station UE # 2 received via Uu radio bearer # C2 (C-RNTI (UE # 2), DRB # 2, E-RAB # 2) Is given priority over the uplink user data for the mobile station UE # 0 received via the Uu radio bearer # A2 (C-RNTI (UE # 0), DRB # 2, E-RAB # 2). You may be comprised so that it may multiplex to bearer Z.

  Here, it is assumed that the mobile station UE # 1 and the mobile station UE # 2 belong to the same group. That is, in type 2 of FIG. 10, the priority control processing unit is configured to perform the above-described priority control processing in units of groups to which each mobile station UE belongs.

  According to the mobile communication system according to the present embodiment, the relay node RN multiplexes the uplink user data for each mobile station UE received via the same QoS Uu radio bearer on the same Un radio bearer. Since it is comprised, the radio | wireless resource for Un radio bearers can be used efficiently.

  Similarly, according to the mobile communication system according to the present embodiment, the radio base station DeNB multiplexes the downlink user data for each mobile station UE received via the same QoS S1 bearer to the same Un radio bearer. Therefore, the radio resources for the Un radio bearer can be efficiently used.

  Further, in the mobile communication system according to the present embodiment, when priority control processing is performed in the RN P / S-GW, there is no influence on the radio interface in the radio base station DeNB.

  Further, in the mobile communication system according to the present embodiment, when priority control processing is performed in the RN P / S-GW and the radio base station DenB, QoS control can be performed in both the S1 bearer and the Un radio bearer.

  The characteristics of the present embodiment described above may be expressed as follows.

  A first feature of the present embodiment is a mobile communication system including a plurality of mobile stations UE # 0 to UE # n, a relay node RN, and a radio base station DeNB, and includes a plurality of mobile stations UE # 0. Relay each of Uu radio bearers for a predetermined QoS set for different mobile stations UE among a plurality of Uu radio bearers (first radio bearers) set between UE #n and relay node RN The gist is that it is configured to map to a predetermined radio Un radio bearer (second radio bearer) set between the node RN and the radio base station DeNB.

  In the first feature of the present embodiment, the relay node RN receives an uplink received via each of the Uu radio bearers for the predetermined QoS based on the priority assigned to each of the Uu radio bearers for the predetermined QoS. You may comprise the priority control process part comprised so that the priority control process with respect to the multiplexing process to the Un radio bearer for predetermined QoS for user data may be performed.

  In the first feature of the present embodiment, among a plurality of S1 bearers (bearers) set between the radio base station DeNB and the gateway device S-GW, for a predetermined QoS set for a different mobile station UE Each of the S1 bearers may be configured to map to a predetermined QoS Un radio bearer.

  In the first feature of the present embodiment, the radio base station DeNB receives the downlink user received via each of the predetermined QoS S1 bearers based on the priority assigned to each of the predetermined QoS S1 bearers. A priority control processing unit configured to perform a priority control process for a process of multiplexing data to a Un radio bearer for predetermined QoS may be provided.

  In the first feature of the present embodiment, the gateway device S-GW includes a gateway device for each mobile station UE (UE S-GW) and a relay node RN gateway device (RN P / S-GW). The S1 bearer for the predetermined QoS is configured to be set between the relay node RN and the P / S-GW for the RN, and the P / S-GW for the RN is used for the predetermined QoS A priority control processing unit configured to perform priority control processing for transmission processing of downlink user data via each of the predetermined QoS S1 bearers based on the priority assigned to each of the S1 bearers You may have.

  A second feature of the present embodiment is a relay node RN, which is a different mobile station among a plurality of Uu radio bearers set between the plurality of mobile stations UE # 0 to UE # n and the relay node RN. Mapping process configured to map each of the predetermined QoS Uu radio bearers set for the UE to a predetermined QoS Un radio bearer set between the relay node RN and the radio base station DeNB And the priority assigned to each of the Uo radio bearers for the predetermined QoS, the uplink user data received via each of the Uu radio bearers for the predetermined QoS to the Un radio bearer for the predetermined QoS And a priority control processing unit configured to perform a priority control process for the multiplexing process.

  A third feature of the present embodiment is a radio base station DeNB, which is set for a different mobile station UE among a plurality of S1 bearers set between the radio base station DeNB and the gateway device S-GW. A mapping processing unit configured to map each of the predetermined QoS S1 bearers to a predetermined QoS Un radio bearer set between the relay node RN and the radio base station DeNB, and a predetermined QoS Based on the priority assigned to each of the S1 bearers, a priority control process for multiplexing the downlink user data received via each of the S1 bearers for the predetermined QoS to the Un radio bearer for the predetermined QoS is performed. And a priority control processing unit configured to perform.

  A fourth feature of the present embodiment is a gateway device (RN P / S-GW) for the relay node RN, which is set between the radio base station DeNB and the RN P / S-GW. Among the S1 bearers, each of the S1 bearers for the predetermined QoS set for different mobile stations UE is mapped to the Un radio bearer for the predetermined QoS set between the relay node RN and the radio base station DeNB. In the case where it is configured, priority control processing for transmission processing of downlink user data via each of the predetermined QoS S1 bearers based on the priority assigned to each of the predetermined QoS S1 bearers And a priority control processing unit configured to perform the above.

  Note that the operations of the mobile station UE, the relay node RN, the radio base station DeNB, and the switching center MME described above may be performed by hardware, may be performed by a software module executed by a processor, or both. It may be implemented by a combination of

  The software module includes a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM, a hard disk, a registerable ROM, a hard disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the mobile station UE, the relay node RN, the radio base station DeNB, or the exchange MME. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE, the relay node RN, the radio base station DeNB, and the switching center MME.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

UE ... mobile station RN ... relay node DeNB ... radio base station MME ... switching station

Claims (1)

A mobile communication system comprising a plurality of mobile stations, relay nodes, and radio base stations,
Among the plurality of first radio bearers set between the plurality of mobile stations and the relay node, each of the first radio bearers for a predetermined QoS set for different mobile stations is connected to the relay node and the relay node. A mobile communication system configured to map to a second radio bearer for the predetermined QoS set with a radio base station.