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Cooperative multi-point (CoMP)-based control method and system for congestion of air interfaces

A technology of congestion control and air interface resources, which is applied in the field of air interface congestion control based on multi-point coordination, can solve problems such as lowering UE service QoS, lowering service quality, and business teardown, so as to improve the overall throughput and simplify the congestion control process Effect

Inactive Publication Date: 2012-11-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air interface congestion control technology used in the LTE system, for the scenario where a cell provides services to UEs, removes air interface congestion by removing the bearers of low-priority services and releasing resources to accept current services, or by reducing the quality of service (QoS, Quality of Service) and release resources to release air interface congestion to accept current services, which will not only cause the UE’s services to be snapped up, but also require the UE to participate in the congestion control process, resulting in cumbersome congestion control processes and reducing the QoS of UE services , because the existing air interface congestion control technology cannot integrate the resources of multiple cells, it cannot be applied to the scenario where multiple cells provide services to UEs at the same time. It is necessary to propose a method that can be applied to a CoMP-based LTE-A system air interface congestion control technology

Method used

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  • Cooperative multi-point (CoMP)-based control method and system for congestion of air interfaces
  • Cooperative multi-point (CoMP)-based control method and system for congestion of air interfaces
  • Cooperative multi-point (CoMP)-based control method and system for congestion of air interfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] When air interface congestion occurs in the main cell in the current CoMP cell concentration, the specific implementation process of air interface congestion control is as follows: figure 2 As shown, the steps are as follows:

[0066] Step 201: Each cooperating cell in the current CoMP cell set periodically feeds back its own channel quality information and remaining air interface resources to the primary cell according to a preset time period.

[0067] Specifically, each coordinated cell feeds back channel quality information including its own CQI, SINR, and the number of remaining RBs to the primary cell.

[0068] Step 202: The main cell receives the E-UTRAN radio access bearer setup request (E-RAB SETUP REQUEST, E-UTRAN Radio Access Bearer SETUP REQUEST) message sent by the core network, triggers the main cell to accept a service of the UE, and then accepts the UE When air interface congestion occurs during a service, the main cell records the air interface resourc...

Embodiment 2

[0075] When air interface congestion occurs in any coordinated cell in the current CoMP cell set, the specific implementation process for air interface congestion control is as follows: image 3 As shown, the steps are as follows:

[0076] Step 301: exactly the same as step 201;

[0077]Step 302: After a cooperating cell in the current CoMP cell group receives the bearer establishment request message sent by the core network, air interface congestion occurs when accepting a service of the UE, and the cooperating cell sends a congestion control request to the primary cell, and the congestion control request includes There are air interface resources needed to relieve current congestion, channel quality information and remaining air interface resources of the coordinated cell.

[0078] Step 303: After receiving the congestion control request sent by the coordinated cell, the primary cell integrates the current CoMP according to the last received channel quality information and ...

Embodiment 3

[0084] Such as Figure 4 As shown, the flow of performing air interface congestion control on the LTE-A system may mainly include the following steps:

[0085] Step 401: The cell receives an E-UTRAN radio access bearer (E-RAB, E-UTRAN Radio Access Bearer) establishment request sent by a mobility management device (MME, Mobility Management Entity);

[0086] Step 402: Air interface congestion occurs when the cell establishes the E-RAB;

[0087] Step 403: verify whether the cell is a CoMP cell, if yes, continue to step 404, otherwise, directly access step 405;

[0088] Step 404: Perform CoMP-based congestion control processing on the cell. If the congestion is successfully resolved and E-RAB is successfully accepted, proceed to step 406; if the congestion is not successfully resolved, proceed to step 405;

[0089] Specifically, if the cell is a primary cell, the processing procedure in Embodiment 1 may be used for implementation, and if the cell is a coordinated cell, the proce...

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Abstract

The invention discloses a cooperative multi-point (CoMP)-based congestion control method, which comprises the following steps that: a main cell integrates own air interface resources and the air interface resources of each cooperative cell according to the air interface resources required by the removal of current congestion, own channel quality information and residual air interface resources, and the channel quality information and residual air interface resources of each cooperative cell, and regulates own resource scheduling and the resource scheduling of each cooperative cell. The invention also discloses a CoMP-based congestion control system. A user equipment (UE) service is not required to be snatched and removed, reduction in the quality of service (QoS) of the UE service also can be avoided, the participation of UE is not required, a congestion control flow is simple, air interface congestion control over a CoMP-based long term evolution-advanced (LTE-A) system is also realized, and the overall throughput of the system can be effectively improved.

Description

technical field [0001] The present invention relates to an air interface congestion control technology of a communication system, in particular to an air interface congestion control method and system based on Cooperative Multi-point (CoMP, Cooperative Multi-Point). Background technique [0002] Coordinated Multi-point transmission / reception technology (ComMP, Coordinated Multi-point transmission / reception) is proposed to further improve the long-term evolution (LTE, Long-Term Evolution) system for edge user throughput, edge user frequency utilization and overall system performance It is also an important element in the advanced long-term evolution (LTE-advanced). ComMP refers to multiple geographically separated transmission points cooperating to participate in the data transmission / reception of a user equipment (UE, User Equipment) to improve the signal quality of edge users, increase the coverage of high-speed data rates, and improve the throughput of the cell edge volum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W72/12
CPCH04J11/0053H04W28/02H04W72/12
Inventor 李子帅
Owner ZTE CORP
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