CN102223678A

CN102223678A - Method for base station to obtain capacity information of user equipment

Info

Publication number: CN102223678A
Application number: CN2011101886783A
Authority: CN
Inventors: 卫琳; 王晓东
Original assignee: New Postcom Equipment Co Ltd
Current assignee: Beijing Haiyun Technology Co ltd
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2011-10-19
Anticipated expiration: 2031-07-06
Also published as: CN102223678B

Abstract

The invention provides a method for a base station to obtain capacity information of user equipment, comprising the following steps: when the user equipment UE in an IDLE (idle) state carries out TAU (tuning and analysis utilities) updating of a tracking area, if a mobile management entity (MME) does not need to create context for the UE, the MME can utilize a downlink non-access layer transmission message to notify the capacity information of the user equipment to the base station when transmitting the downlink non-access layer transmission message to the base station. By adopting the invention, the base station can rapidly obtain the capacity information of the user equipment, and the vacancy port transmission resource is saved and the load balancing control in idle state to the UE can be effectively realized.

Description

A kind of base station obtains the method for capability information of user facility

Technical field

The present invention relates to the resource management techniques of mobile communication system, particularly relate to the method for base station acquisition subscriber equipment (UE) ability information in wireless network Long Term Evolution LTE (the Long Term Evolution) network.

Background technology

The LTE network is the network of a flattening.Fig. 1 is the LTE network structure, and as shown in Figure 1, (Evolved Node Base, eNB) (Evolved Packet Core EPC) forms this network with the evolution packet switching center by E-UTRAN (Evolved UTRAN) base station.E-UTRAN comprises the set of the eNB that links to each other by the S1 interface with EPC, links to each other by X2 interface between the eNB, and each eNB comprises a plurality of sub-districts.

According to 36.300 agreements, the UE ability information is stored in MME.Set up in the request message at initial context, the UE ability is dealt into the base station from MME, if the base station needs more ability information, then the UE ability acquisition process by Radio Resource control (RRC) is from UE acquisition capability information.In this process, the base station is meeting specifies radio access technology (RAT) information in UE capability query (UECapabilityEnquiry) message that UE sends, in case receive UE ability information (UECapabilityInformation) message of UE, then the base station can send UE ability information indication (UE CAPABILITYINFO INDICATION) to mobile management entity (MME), up-to-date UE ability is passed to MME, and MME can keep these information up to the UE attachment removal or adhere to again.

According to existing protocol, under situation about not switching, the base station will seek out the UE ability, except the UE ability acquisition process that uses RRC, can only set up request message by the initial context that MME sends.

But, at some situation UE is that not need to create UE contextual when entering connected state, for example, under idle (IDLE) state, when UE carries out tracing section updating (TAU) process, if the UE indication does not need to create Data-carrying, do not need to set up the UE context yet, the thresholding that is " active flag " in the TAUrequest message that sends of UE is " false ", and in such cases, MME will can not set up the UE context.Like this, the base station can't obtain the UE ability from MME again.The schematic flow sheet of TAU process may further comprise the steps as shown in Figure 2 under the above-mentioned situation:

Step 1, UE initiate the RRC connection request.

Step 2, eNodeB send the RRC connection to UE and set up message.

Step 3, UE send the RRC connection setup complete message to eNodeB, wherein carry Non-Access Stratum (NAS) message (TAU Request), " Active the flag "=false in this TAU Request message.

" Active flag " in TAU Request message is false, illustrates that then MME need not set up contextual information and set up corresponding carrying for UE in subsequent process.

Step 4, eNodeB send initial UE message to MME, wherein carry NAS message (TAU Request).

Step 5, UE and MME can carry out authentication and security process if necessary.

Step 6, MME send descending Non-Access Stratum message transfer (DOWNLINK NAS TRANSPORT to eNodeB, wherein comprise TAU Accept), distribute global unique temporary identity (GUTI) if MME is UE, then will carry this whole world unique temporary identity information among this TAU Accept.

Step 7, eNodeB send descending NAS message (TAU Accept) to UE.

If comprise GUTI in the step 8 TAU Accept message, then UE sends up NAS message (TAU Complete) to eNodeB, and MME has received this GUTI with notice.

Step 9, eNodeB send up NAS message (TAU Complete) to MME.

If " Active the flag "=false in the step 10 TAU Request message, and TAU initiates under the IDLE state, and then MME can discharge the UE context.

Step 11, eNodeB send RRC to UE and connect release (RRCConnectionRelease) message.

Step 12, UE send UE context Release complete to eNodeB.

In said process, in order to carry out load balancing, connect when discharging at RRC, the base station need dispose alien frequencies/RAT dedicated priority under redirection information and the idle pulley for UE, otherwise, can't realize load balancing.Being specially collocation method is, redirected beared information (RedirectedCarrierInfo) in the RRC connection release message and idle pulley move control information (IdleModeMobilityControlInfo) and be respectively UE and indicated alien frequencies/RAT special priority information under redirected carrier information and the idle pulley.Correspondingly, UE will be redirected to the carrier wave of the indicated E-UTRA of RedirectedCarrierInfo or other access technologies, and use the carrier wave priority of IdleModeMobilityControlInfo indication under idle pulley.

And when being information aspect UE configuration is redirected in the base station, need carry out according to the ability information of UE in order to ensure the accuracy of configuration, otherwise can on eating dishes without rice or wine, transmit invalid control information, and UE need judging whether the carrier information that disposes is supported.

At present, can not obtain the UE ability information in the contextual TAU process of UE above-mentioned foundation in order to make the base station, the UE ability acquisition process of RRC need be triggered in the base station, so, will cause the waste of transfer resource of eating dishes without rice or wine, and increase processing delay.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of base station to obtain the method for UE ability information, and this method can be carried out TAU in the IDLE attitude at UE, and when not needing to set up the UE context among this TAU, the base station can obtain capability information of user facility by quick, and can save interface-free resources.

In order to achieve the above object, the technical scheme of the present invention's proposition is:

A kind of base station obtains the method for UE ability, may further comprise the steps:

Carry out in the process of tracing section updating TAU at the user equipment (UE) that is in Idle state, if mobile management entity MME does not need to set up context for this UE, then this MME utilizes this message that the ability information of this UE is notified to described base station when sending descending Non-Access Stratum message transfer to the base station.

In sum, the base station that the present invention proposes obtains the method for UE ability information, directly utilize and carry the descending Non-Access Stratum message transfer of UE ability information, can make the base station obtain the UE ability information fast, and can save the transfer resource of eating dishes without rice or wine, thereby more effectively UE is carried out the load balancing control of Idle state.

Description of drawings

Fig. 1 is existing LTE schematic network structure;

Fig. 2 carries out in the process of TAU for the UE that is in the IDLE attitude in the existing system, the schematic flow sheet when MME does not need to set up context for this UE.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.

Core concept of the present invention is: increase by optionally is used to carry the information word of UE ability information in descending Non-Access Stratum message transfer, like this, in the time of need obtaining the UE ability information in the base station, can utilize this descending Non-Access Stratum message transfer that the UE ability information is notified to the base station.

The particular content of the embodiment of the invention one comprises:

Carry out in the process of TAU at the UE that is in the IDLE attitude, if MME does not need for this UE sets up context, then this MME utilizes this message that the ability information of this UE is notified to described base station when sending descending Non-Access Stratum message transfer to the base station.

Here, by directly utilizing the descending Non-Access Stratum message transfer in the TAU process, the ability information of UE is notified to the base station, can avoid existing system need come acquisition capability information once more by the UE ability acquisition process that triggers RRC from UE, so, can save the transfer resource of eating dishes without rice or wine, more effectively UE be carried out the load balancing control of Idle state.

As mentioned above, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a base station obtains the method for capability information of user facility, it is characterized in that this method may further comprise the steps:

Carry out in the process of tracing section updating TAU at the user equipment (UE) that is in idle IDLE attitude, if mobile management entity MME does not need to set up context for this UE, then this MME utilizes this message that the ability information of this UE is notified to described base station when sending descending Non-Access Stratum message transfer to the base station.