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Problems solved by technology
However, during handover, the target eNB may only accept some bearers when reserving resources, and the part of bearers without reserved resources will not be established on the target side during the handover process, so the bearer connection status between the UE and the target side subject to change
If the target eNB still uses the same UE-AMBR as the source side for scheduling, it is obviously not accurate enough, which will affect the transmission performance of the network
Method used
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Embodiment 1
[0020] Embodiment 1: UE-AMBR is updated during X2 handover.
[0021] The MME remains unchanged when X2 is switched, and the processing flow is as follows figure 1 As shown, it specifically includes the following steps:
[0022] Step 100: Through attach or tracking area update (TAU) process, the source eNB obtains the handover area restriction information of the UE from the MME, and saves it in the UE context message of the eNB.
[0023] Step 101: The source eNB configures the measurement process of the UE according to the area restriction information.
[0024] Step 102: The UE triggers reporting of a measurement report.
[0025] Step 103: The source eNB executes a handover decision according to the measurement information reported by the UE and a radio resource management (RRM) algorithm.
[0026] Step 104: the source eNB sends a handover request message to the target eNB, requiring the target eNB to reserve resources for the UE, and transfers the UE context information sto...
Embodiment 2
[0039]Embodiment 2: UE-AMBR update process during S1 handover.
[0040] When S1 is switched, MME switching occurs, that is, switching from the source MME to the target MME. The processing flow is as follows: figure 2 shown, including the following steps:
[0041] Step 201 to Step 203: The source eNB decides to initiate a handover process. First, the source eNB judges whether the handover can be completed through the X2 interface. If not, it sends a handover request to the source MME to initiate a handover process based on the S1 interface. The source MME selects the target MME, and sends the UE context including the bearer information of the PDN gateway and the serving gateway to the target MME as a forward relocation request. The target MME learns from the received forward relocation request all the APNs activated when the UE is connected to the source eNB.
[0042] Step 204: This step is only used for serving gateway relocation, the target MME selects a target serving gat...
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Abstract
The invention discloses a method for acquiring load situation during user-equipment switch, which comprises the following steps that: when user equipment is switched, a target base station performs admission decision on the UE on the basis of received load information of the UE, determines admitted loads, and informs a mobility management entity (MME) about the admitted loads; and according to the received loads admitted by the target base station, the MME updates the UE-AMBR (aggregate maximum bit rate) used by the target base station. The invention also discloses the mobile management entity which can allow a target side to acquire actual load situation when the UE is switched. The scheme of the invention can allow the target side to acquire the actual admitted load situation and enable the target side to schedule resources according to actual connection situation.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, and in particular to a method for obtaining bearer status when user equipment switches and a mobile management entity (MME). Background technique [0002] In the long-term evolution project (LTE) system, the access node maximum aggregate bit rate (Access Point Name-AggregateMaximum Bit Rate, APN-AMBR) and the user equipment maximum aggregate bit rate are defined for all non-guaranteed bit rate (non-GBR) bearers Rate (UE-AMBR) two parameters. APN-AMBR is stored in the Home Subscriber Server (HSS) as subscription information, which limits the maximum transmission aggregated bit rate that the network can provide for all non-GBR bearers connected to the same Access Point Name (APN) by the UE. Services exceeding the limit will be discarded. If other non-GBR bearers have no service transmission, any non-GBR bearer can occupy all APN-AMBR resources. Both the Packet Data Network G...
Claims
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