CN101848497B - Method and system for establishing data radio bearer (DRB) - Google Patents
Method and system for establishing data radio bearer (DRB) Download PDFInfo
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Abstract
The invention discloses a method and a system for establishing a data radio bearer (DRB). The method comprises the following steps that: a relay node (RN) indicates DRB resource information which needs establishing initially to a mobility management entity (MME) in an evolution packet core (EPC) in the attachment process of user equipment (UE); after receiving the indication which shows the DRB resource information which needs establishing initially, the MME transmits a bearer establishing configuration parameter to a donor evolution node B (DeNB) which provides service for the RN; and after receiving the bearer establishing configuration parameter, the DeNB performs the initial DRB establishment of a Un interface through the reconfiguration process of radio resource control (RRC) at the Un interface. The method and the system can establish the DRB when the RN starts.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of Data Radio Bearer method for building up and system.
Background technology
After Long Term Evolution (LTE, the Long Term Evolution) technology of 3GPP, the 3GPP tissue continues the LTE scheme is strengthened, and this technique for enhancing is called the LTE enhancing, and (namely LTE-A is the follow-up evolution of LTE technology for LTE-A, LTE-Advanced) technology.
In the LTE-A technology, in the framework of Access Network, increased via node (RN, Relay Node).RN can be regarded as the extension of evolution base station (eNB), for system provides more economical covering.RN is connected by wave point with eNB, and it can strengthen covering quality at the edge that eNB covers, and also can dispose the scope of expanding covering outside the eNB overlay area.
Fig. 1 is the schematic diagram of the RN in existing LTE-A networking.As shown in Figure 1, for providing the eNB of wireless access service, RN is called donor base station (DeNB, Donor eNB); Be connected by wireless Un interface between RN and the DeNB, the Uu interface by LTE between RN and the subscriber equipment (UE) is connected; Mobility Management Entity/the gateway of RN and core net (MME/SGW, Mobility Management Entity/Serving Gateway) is connected to UE by the S1 interface provides service; This S1 interface is through the DeNB switching, and namely DeNB is as the forward node of S1 interface.
DeNB in the framework shown in Figure 1 comprises middle rotating function, its S1 interface application protocol (S1AP) signaling and S1 user plane data that shows as the S1 control plane all arrives DeNB earlier, DeNB also knows has signaling and data to arrive, can resolve even revise them, be transmitted to the packet-based core networks (EPC) of RN or evolution afterwards again.
For the RN framework of the current discussion of 3GPP, DeNB finishes agency (proxy) function, and the residential quarter of RN can be regarded as the residential quarter under the DeNB.
Fig. 2 is the RN start-up course schematic diagram in the existing RN framework.As shown in Figure 2, the RN start-up course is to similar in the past, only at S1 with some is different aspect X2 interface is set up.No matter what MME and adjacent eNB are arranged, RN only need set up a S1/X2 interface, and all ends at DeNB.The existing S1/X2 of DeNB connects the S1/X2 connection that is used for acting on behalf of RN.RN inserts enough, and the S1/X2 of DeNB needs to upgrade, as: to the new residential quarter of adjacent eNB registration RN or tracking area sign indicating number (TAC) from RN to MME that register, can realize by existing eNB config update process.In Fig. 2, in first frame of broken lines is the UE attaching process, sets up basic IP and connects; In second frame of broken lines is the node layoutprocedure, and RN carries out work as network node.
Fig. 3 is the UE loading establishing process schematic diagram in the existing RN framework.As shown in Figure 3, in the UE loading establishing process in the RN framework, the S1 message of carrying carrying foundation request directly arrives DeNB.If the RN carrying needs to upgrade (as GBR carrying situation, when wherein multiplexing UE GBR E-RAB exceeds the RN tolerance limit, need to increase this RN GBR parameter, to guarantee more physical resources), PGW function in the DeNB is to the MME starting update load bearing request of RN, and network side is initiated bearing modification again.RN also can initiate bearer update by the bearing resource request process.
Though provided above-mentioned RN start-up course and UE loading establishing process in the prior art, but do not provided scheme how to set up Data Radio Bearer (DRB, DataRadio Bearer) when RN starts.
Summary of the invention
The invention provides a kind of DRB method for building up, this method can be implemented in and set up initial DRB when RN starts.
The present invention also provides a kind of DRB to set up system, and this system can be implemented in and set up initial DRB when RN starts.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of Data Radio Bearer DRB method for building up, the DRB of the Un interface when this method is applied to via node RN startup sets up, and this method comprises:
RN indication of the mobile management entity MME in the packet-based core networks EPC of evolution in the user equipment (UE) attaching process initially needs the DRB resource information set up;
After MME receives the indication of the initial DRB resource information that need connect of expression, send carrying to alms giver's node DeNB that service is provided for described RN and set up configuration parameter;
DeNB finishes the foundation of the initial DRB of Un interface receiving after described carrying sets up configuration parameter by the radio resource control RRC reconfiguration course at the Un interface.
The invention also discloses DRB and set up system, this system comprises: RN, DeNB and MME, wherein,
RN is used for the DRB resource information that initially need set up to the MME indication at the UE attaching process;
MME is used for sending carrying to the DeNB that service is provided for described RN and setting up configuration parameter after the indication of the DRB resource information that the expression that receives from RN initially need connect;
DeNB is used for finishing the foundation of the initial DRB of Un interface by the radio resource control RRC reconfiguration course at the Un interface receiving after described carrying sets up configuration parameter.
By as seen above-mentioned, this RN of the present invention indication of the MME in the EPC in the UE attaching process initially needs the DRB resource set up, after MME receives the indication of the initial DRB resource that need connect of expression, send carrying to the DeNB that service is provided for described RN and set up configuration parameter, DeNB is receiving after described carrying sets up configuration parameter, finish the technical scheme of foundation of the initial DRB of Un interface at the Un interface by the RRC reconfiguration course, can be implemented in and set up DRB when RN starts.
Description of drawings
Fig. 1 is the schematic diagram of the RN in existing LTE-A networking;
Fig. 2 is the RN start-up course schematic diagram in the existing RN framework;
Fig. 3 is the UE loading establishing process schematic diagram in the existing RN framework;
Fig. 4 is the flow chart of a kind of DRB method for building up of the embodiment of the invention;
Fig. 5 is the embodiment of the invention is set up DRB when RN starts schematic diagram;
Fig. 6 is that the embodiment of the invention is passed through the schematic diagram that the E-RAB process realizes that DRB upgrades;
Fig. 7 is that embodiment of the invention DeNB directly carries out the schematic diagram that DRB upgrades;
Fig. 8 is the composition schematic diagram that a kind of DRB of the embodiment of the invention sets up system.
Embodiment
Fig. 4 is the flow chart of a kind of DRB method for building up of the embodiment of the invention.The DRB of the Un interface when RN started during this method was applied to sets up, and as shown in Figure 4, this method comprises:
Can be implemented in the RN start-up course by such scheme and to set up DRB.
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with specific embodiment.
Fig. 5 is the embodiment of the invention is set up DRB when RN starts schematic diagram.As shown in Figure 5, the DRB of Un interface created a mechanism as follows when RN started: RN is based on pre-configured, and according to self-ability and available Un interface resource, the MME indication initially needs the DRB resource set up in the EPC in UE attaching process (UE AttachProcedure).Here because EPC is unknowable for Radio Resource, the DRB resource information that therefore initially needs to set up can be the information of a summary, rather than clear and definite wireless resource information, for example can be bearer cap rank cell (IE).RN can pass through Access Layer (AS) signaling or the initial DRB resource that needs foundation of Non-Access Stratum (NAS) signaling indication.The MME of EPC receives after expression initially needs the indication of the DRB resource that connects, in conjunction with the EPC resource status, sets up (UE Context Setup) process by the UE context and will carry and set up configuration parameter and send to DeNB; Perhaps, after the MME of EPC receives the indication of the initial DRB resource that need connect of expression, the RAB E-RAB that initiates evolution after process set up in the UE context sets up process, shown in dotted arrow among Fig. 5, and sets up process by E-RAB and will carry and set up configuration parameter and send to DeNB.It is to distribute relevant configuration parameter with resource when setting up carrying that parameter is set up in the carrying here.DeNB finishes the foundation of the initial DRB of Un interface receiving after described carrying sets up configuration parameter by the radio resource control RRC reconfiguration course at the Un interface.
After Data Radio Bearer (DRB, Data Radio Bearer) is set up, how to change the DRB configuration as required, existing scheme does not have clear and definite message content.Existing scheme also needs to contact with EPC, exists redundant.
This is given by process shown in Figure 5 finish after initial DRB sets up, the specific implementation of the DRB renewal process of Un interface comprises following two kinds of possibilities:
Scheme one: DeNB triggers, and realizes by the E-RAB management process
By existing program shown in Figure 3, can realize that to the request of MME starting update load bearing the DRB of Un interface upgrades by S1 (RN) interface by DeNB, but also do not have the S1 process can indicate this information in the prior art, the process as shown in Figure 6 that for this reason provided among the present invention realizes this indication.
Fig. 6 is that the embodiment of the invention is passed through the schematic diagram that the E-RAB process realizes that DRB upgrades.As shown in Figure 6, in the E-RAB of S1 interface management process, increase the E-RAB change and require (E-RAB Modify Required) message.When DeNB need upgrade the DRB carrying, send the E-RAB change to MME and require (E-RAB Modify Required) message, comprise the bearer cap rank cell that DRB wishes after changing in this message.The corresponding corresponding RN of the numerical values recited of this bearer cap rank cell is in the DRB of Un interface amount of capacity.MME receives that E-RAB change requires to initiate the E-RAB change procedure after the message, and revises the DRB that comprises the Un interface by the E-RAB change procedure at interior E-RAB.Here the E-RAB change procedure is specially: MME sends E-RAB change request (E-RAB ModifyRequest) message to DeNB, and DeNB returns E-RAB change response (E-RAB ModifyResponse) message to MME.
Scheme two: DeNB triggers, and DeNB directly revises DRB
Fig. 7 is that embodiment of the invention DeNB directly carries out the schematic diagram that DRB upgrades.As shown in Figure 7, because the user face data of SGW/PGW (UE) directly arrives DeNB, be mapped to above the Un interface DRB by DeNB, therefore, the modification of Un interface DRB does not need to link up with MME (RN), and directly revise the Un interface resource, GBR value as the aforementioned, and keep the configuration of RN S1 interface bearing and constant with the mapping relations of DRB.Be that DeNB does not send message to MME, directly the RRC by the Un interface connects the DRB that reconfiguration course is changed the Un interface, and the benefit of this method is that processing speed is fast, and the grasp of the Un interface resource state of DeNB is accurate, and the carrying configuration of initiation is more effective.
In embodiments of the present invention, the event of triggering DRB renewal process comprises:
1) increase of shared DRB resource
If the UE quantity that inserts from RN increases, the occupancy that DeNB or RN detect the DRB resource on the Un interface is higher than preset first threshold TH
h, and kept first preset time T
hThe time, the DRB renewal process of triggering Un interface.
2) minimizing of shared DRB resource
The occupancy that detects the DRB resource on the Un interface as DeNB or RN is lower than preset second threshold value TH
1, and kept second preset time T
1The time, trigger the DRB renewal process of described Un interface.
The benefit of this strategy is to keep the Un resource that certain surplus is arranged, and inserts at any time to utilize UE, can effectively utilize the Un interface resource again.
Next provide the composition that a kind of DRB among the present invention sets up system based on above-described embodiment.
Fig. 8 is the composition schematic diagram that a kind of DRB of the embodiment of the invention sets up system.As shown in Figure 8, this system comprises: RN, DeNB and MME, wherein,
RN is used for the DRB resource information that initially need set up to the MME indication at the UE attaching process;
MME is used for sending carrying to the DeNB that service is provided for described RN and setting up configuration parameter after the indication of the DRB resource information that the expression that receives from RN initially need connect;
DeNB is used for finishing the foundation of the initial DRB of Un interface by the radio resource control RRC reconfiguration course at the Un interface receiving after described carrying sets up configuration parameter.
In system shown in Figure 8, described RN is used for the DRB resource information that initially need set up by AS signaling or the indication of NAS signaling.
In system shown in Figure 8, described MME is used for setting up process by the UE context and will carries and set up configuration parameter and send to DeNB; Perhaps, described MME is used for the RAB E-RAB initiate evolution after process set up in the UE context, and will carry by the E-RAB process and set up configuration parameter and send to DeNB.
In system shown in Figure 8, after finishing initial DRB foundation, described DeNB is further used for requiring message to the RAB E-RAB change of MME transmission evolution; This E-RAB change requires to comprise in the message DRB bearer cap rank cell after changing; MME is further used for initiating the E-RAB change procedure receiving after E-RAB change requires message, and revises the E-RAB of the DRB that comprises the Un interface by the E-RAB change procedure; Perhaps, described DeNB does not send message to MME, and directly the RRC by the Un interface connects the DRB that reconfiguration course is changed the Un interface.
In system shown in Figure 8, described DeNB or RN are used for being higher than the first default thresholding in the occupancy that detects the DRB resource on the Un interface, and when having kept first Preset Time, trigger the DRB renewal process of described Un interface; And/or described DeNB or RN are used for being lower than preset second threshold in the occupancy that detects the DRB resource on the Un interface, and when having kept second Preset Time, trigger the DRB renewal process of described Un interface.
In sum, this RN of the present invention indication of the MME in the EPC in the UE attaching process initially needs the DRB resource set up, after MME receives the indication of the initial DRB resource that need connect of expression, send carrying to the DeNB that service is provided for described RN and set up configuration parameter, DeNB is receiving after described carrying sets up configuration parameter, finish the technical scheme of foundation of the initial DRB of Un interface at the Un interface by the RRC reconfiguration course, can be implemented in and set up DRB when RN starts.And give the process that DRB upgrades of how carrying out among the present invention, and the mechanism that triggers the DRB renewal process.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (6)
1. the DRB of the Un interface when Data Radio Bearer DRB method for building up, this method are applied to via node RN and start sets up, and it is characterized in that this method comprises:
RN indication of the mobile management entity MME in the packet-based core networks EPC of evolution in the user equipment (UE) attaching process initially needs the DRB resource information set up;
After MME receives the indication of the initial DRB resource information that need connect of expression, send carrying to alms giver's node DeNB that service is provided for described RN and set up configuration parameter;
DeNB finishes the foundation of the initial DRB of Un interface receiving after described carrying sets up configuration parameter by the radio resource control RRC reconfiguration course at the Un interface;
Wherein:
The described RN DRB resource information that the indication of the MME in the EPC initially needs to set up in the UE attaching process comprises:
RN initially needs the DRB resource information of foundation by Access Layer AS signaling or the indication of Non-Access Stratum NAS signaling;
MME sets up configuration parameter to the DeNB transmission carrying that service is provided for described RN and comprises:
MME sets up process by the UE context and will carry and set up configuration parameter and send to DeNB;
Perhaps,
MME initiates the RAB E-RAB process of evolution after process set up in the UE context, and will carry by the E-RAB process and set up configuration parameter and send to DeNB.
2. method according to claim 1 is characterized in that, after finishing initial DRB foundation, this method further comprises: the DRB renewal process of Un interface;
The DRB renewal process of this Un interface comprises:
DeNB requires message to the RAB E-RAB change that MME sends evolution; This E-RAB change requires to comprise in the message DRB bearer cap rank cell after changing; MME receives that the E-RAB change requires to initiate the E-RAB change procedure after the message, and revises the E-RAB of the DRB that comprises the Un interface by the E-RAB change procedure;
Perhaps, DeNB does not send message to MME, and directly the RRC by the Un interface connects the DRB that reconfiguration course is changed the Un interface.
3. method according to claim 2 is characterized in that,
The occupancy that detects the DRB resource on the Un interface as DeNB or RN is higher than the first default thresholding, and when having kept first Preset Time, triggers the DRB renewal process of described Un interface;
And/or,
The occupancy that detects the DRB resource on the Un interface as DeNB or RN is lower than preset second threshold, and when having kept second Preset Time, triggers the DRB renewal process of described Un interface.
4. a DRB sets up system, it is characterized in that, this system comprises: RN, DeNB and MME, wherein,
RN is used for the DRB resource information that initially need set up to the MME indication at the UE attaching process;
MME is used for sending carrying to the DeNB that service is provided for described RN and setting up configuration parameter after the indication of the DRB resource information that the expression that receives from RN initially need connect;
DeNB is used for finishing the foundation of the initial DRB of Un interface by the radio resource control RRC reconfiguration course at the Un interface receiving after described carrying sets up configuration parameter;
Wherein:
Described RN is used for the DRB resource information that initially need set up by AS signaling or the indication of NAS signaling;
Described MME is used for setting up process by the UE context and will carries and set up configuration parameter and send to DeNB;
Perhaps,
Described MME is used for the RAB E-RAB initiate evolution after process set up in the UE context, and will carry by the E-RAB process and set up configuration parameter and send to DeNB.
5. system according to claim 4 is characterized in that, after finishing initial DRB foundation,
Described DeNB is further used for requiring message to the RAB E-RAB change of MME transmission evolution; This E-RAB change requires to comprise in the message DRB bearer cap rank cell after changing; MME is further used for initiating the E-RAB change procedure receiving after E-RAB change requires message, and revises the E-RAB of the DRB that comprises the Un interface by the E-RAB change procedure;
Perhaps, described DeNB does not send message to MME, and directly the RRC by the Un interface connects the DRB that reconfiguration course is changed the Un interface.
6. system according to claim 5 is characterized in that,
Described DeNB or RN are used for being higher than the first default thresholding in the occupancy that detects the DRB resource on the Un interface, and when having kept first Preset Time, trigger the DRB renewal process of described Un interface;
And/or,
Described DeNB or RN are used for being lower than preset second threshold in the occupancy that detects the DRB resource on the Un interface, and when having kept second Preset Time, trigger the DRB renewal process of described Un interface.
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| CN102448121B (en) * | 2010-09-30 | 2014-10-29 | 普天信息技术研究院有限公司 | Method for releasing user bearer in wireless relay network |
| CN102026101B (en) | 2011-01-14 | 2013-02-20 | 大唐移动通信设备有限公司 | MBMS (multimedia broadcast multicast service) implementation method and equipment in scene of network deployment relay node |
| CN102724718A (en) * | 2012-06-05 | 2012-10-10 | 大唐移动通信设备有限公司 | Method and device for notifying bearer information |
| CN103517351B (en) * | 2012-06-29 | 2016-09-14 | 华为技术有限公司 | DRB method for building up and equipment |
| EP2879306B1 (en) | 2012-07-26 | 2019-05-22 | LG Electronics Inc. | Method of supporting communication using two or more radio access technologies and apparatus for same |
| WO2014060036A1 (en) * | 2012-10-18 | 2014-04-24 | Nokia Solutions And Networks Oy | Intelligent bearer setup configuration control |
| CN106211352A (en) * | 2015-05-04 | 2016-12-07 | 中兴通讯股份有限公司 | The method for building up of Data Radio Bearer and device |
| CN107113811A (en) * | 2015-08-06 | 2017-08-29 | 华为技术有限公司 | A kind of method and device for setting up Data Radio Bearer |
| JP2019050435A (en) * | 2016-01-19 | 2019-03-28 | シャープ株式会社 | Terminal device, c-sgn, and communication control method |
| CN107222934A (en) * | 2017-06-28 | 2017-09-29 | 京信通信系统（中国）有限公司 | Base station carrying establishing method and system |
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| CN101123797A (en) * | 2006-08-08 | 2008-02-13 | 华为技术有限公司 | Processing method and system for wireless access carrier |
| CN101483898A (en) * | 2008-01-07 | 2009-07-15 | 华为技术有限公司 | Method and apparatus for accelerating RRC connection establishment |
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