WO2012163116A1

WO2012163116A1 - Comp based service switching method and system

Info

Publication number: WO2012163116A1
Application number: PCT/CN2012/071623
Authority: WO
Inventors: 郄小丹
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-05-27
Filing date: 2012-02-24
Publication date: 2012-12-06
Also published as: CN102802219A

Abstract

Disclosed are a Comp based service switching method and system, which can switch a service to a target cell satisfying a resource requirement in a Comp cell set to which a cell serving the service belongs when the cell serving the service is lack of resources. In the present invention, the Comp based service switching technology solves the problem of how to perform service switching in a coordinated multiple point operation, thereby improving the service quality, improving the cell edge throughput, and increasing the user satisfaction.

Description

Comp-based service switching method and system

The present invention relates to the field of communications, and in particular, to a service switching method and system based on multi-point cooperation (Comp). Background technique

Coordinated Multiple Point Transmission and Reception (CEO) is designed to further meet the LTE (Long Term Evolution) system for edge user throughput, edge user frequency utilization, and overall system performance. The core idea is: Multiple transmission points with spatial location adjacency serve one user or multiple users at the same time. The schematic diagram is shown in Figure 1.

Compared with the existing LTE network framework and design concept, the biggest change of the multi-point coordinated transmission and reception technology is that the UE (User Equipment) will simultaneously perform data with neighboring cells in multiple spatial locations. Receive and send operations. In this case, how to coordinate the coordinated work between multiple separated and independent cells is very important. At this point, it is necessary to introduce the concept of centralized management, that is, there are primary and secondary cells, the former is responsible for all coordination. The selection of the working cell, the collection of status, the analysis, the assignment of scheduling, etc., and the interaction with the user's data at the same time, the function is more complicated; while the latter is mainly responsible for the interaction of its own state and interaction with the user data, the function is relatively simple; Moreover, the roles of the two can be interchanged under certain conditions. For different users, the same cell may play two different roles at the same time.

In the LTE system, when the user's service is not satisfied or the service quality is degraded in the current serving cell, the refusal to accept or reduce the quality of service is generally adopted, which leads to the edge user throughput in the coordinated transmission and reception scenarios. Lowering, this reduction in service quality in turn reduces user satisfaction. Summary of the invention

In view of this, the main object of the present invention is to provide a service switching method and system based on Comp, which improves edge user throughput, improves service quality and user satisfaction.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A service switching method based on multi-point cooperation Comp, comprising:

When the cell serving the service has insufficient resources, the service is switched to the target cell that meets the resource requirement in the Comp cell set to which the cell serving the service belongs.

The target cell is determined by selection, and the selection method is:

Manner 1: According to the information of other cells in the Comp cell, the cell set whose remaining resources satisfy the service is selected, and the cell that meets the resource requirement is selected, and the cell is used as the service switching target cell;

Or,

Manner 2: According to the information of other cells in the Comp cell, the earliest received cell remaining resources satisfying the service are used as the selected target cell.

In the first method, the operation of the screening cell set is performed by a cell serving a service, and the operation of the cell that meets the resource requirement is performed by a user equipment UE or a cell serving a service.

The method further includes:

In the first method, when the handover fails, the cell with the remaining resources satisfying the quality of the cell in the centralized channel of the service is used as the target cell, and the service is switched.

The method further includes:

In the second mode, the cell serving the service stores information feedback of other cells in the Comp cell set received subsequently, so that the next handover to the target cell is performed after the service handover fails.

A service switching system based on Comp, including resource statistics unit and Comp cell switching Unit; among them,

The resource statistics unit is configured to confirm that the cell serving as the service has insufficient resources, and notify the Comp cell switching unit of the situation;

The Comp cell switching unit is configured to switch the service to a target cell that meets a resource requirement in a Comp cell set to which the cell serving the service belongs.

The target cell is determined by selection, and the Comp cell switching unit is used to:

Manner 1: According to the information of other cells in the Comp cell, the cell set whose remaining resources satisfy the service is selected, so as to select a cell that meets the resource requirement, and use the cell as a service switching target cell;

Or,

In the first method, the Comp cell switching unit is further configured to: after filtering out the remaining resources to satisfy the cell set of the service:

Selecting a cell that meets the resource requirement from the selected cell that meets the remaining resources of the service, and using the cell as a service switching target cell;

Or, the selected cell that meets the service is sent to the UE, and the UE is triggered to select a cell that meets the resource requirement from the received cell set, and uses the cell as a service switching target cell.

The Comp cell switching unit is further configured to:

In the second manner, the information feedback of the other cells in the Comp cell set received in the subsequent manner is stored, In order to perform the next handover to the target cell after the service handover fails.

The invention is based on the service switching technology of Comp, which solves the problem of how to perform service switching in multi-point cooperative operation, can improve service quality, improve cell edge throughput, and improve user satisfaction. DRAWINGS

Figure 1 is a schematic diagram of the principle of multi-point cooperation;

2 is a schematic diagram of a service switching principle based on Comp according to the present invention;

3 is a flowchart of a service switching based on Comp according to Embodiment 1 of the present invention;

4 is a flowchart of a service switching based on Comp according to Embodiment 2 of the present invention;

5 is a flowchart of a service switching based on Comp according to Embodiment 3 of the present invention;

6 is a schematic diagram of a service switching process based on Comp according to an embodiment of the present invention;

FIG. 7 is a diagram of a Comp-based service switching system according to an embodiment of the present invention. detailed description

In actual application, the process shown in FIG. 2 may be performed, and the process includes the following steps: Step 201: Perform remaining resource statistics for the cell serving the service.

Step 202: Determine whether the remaining resources of the cell serving the service are sufficient. If yes, go back to step 201; otherwise, go to step 203.

Step 203: It is determined whether the cell serving as the service belongs to the CoMP cell, and if it belongs to the CoMP cell, in the Comp cell set to which the cell serving the service belongs, the service is switched to the target cell that meets the resource requirement, and enters Step 204; Otherwise, proceed to step 210.

Step 204: Determine whether the CoMP cell service handover is successful. If successful, return to step 201; otherwise, proceed to step 210.

Step 210: Perform subsequent operations in the prior art, such as releasing services or reducing quality of service. The invention is described in detail below with reference to the accompanying drawings. Embodiment 1 is that the downlink service is not satisfied;

It should be noted that the cell information is exchanged between cells in the Comp cell set, and the cell information includes at least the remaining resources.

As shown in FIG. 3, the situation described in Embodiment 1 specifically includes the following steps:

Step 1: The UE performs services in the primary cell.

Step 2: The primary cell detects that the quality of service (Qos) of the service performed by the UE cannot be satisfied.

Step 3: The primary cell selects a cell set whose remaining resources satisfy the Qos resource requirement of the service performed by the UE according to the information of other cells in the obtained Comp cell, and notifies the UE of the cell set to select the cell to be switched. ;

Step 4: The UE selects the cell with the best channel quality from the received cell according to the channel quality, uses the cell as the service switching target cell, and sends a service switching request to the primary cell. Step 5: The primary cell receives the UE After the service switching request, the service switching request is sent to the target cell, and the target cell is requested to perform the service switching preparation; the service switching request includes at least the QoS information of the service that the UE performs the handover;

Step 6: The target cell establishes a service load for the UE according to the Qos information included in the service switching request sent by the primary cell, and sends a response message to the primary cell after the establishment is successful;

This step involves an evolved universal terrestrial radio access network radio access bearer (E_RAB) setup request and an E_RAB setup response.

Step 7: The primary cell releases the information of the service of the UE on the primary cell.

Step 8: The UE performs a service in the target cell.

Embodiment 2. The situation that the uplink service is not satisfied;

It should be noted that the cell information is periodically exchanged between cells in the Comp cell set, and the cell information includes at least the remaining resources and channel quality.

As shown in FIG. 4, the situation described in Embodiment 2 specifically includes the following steps: Step 1: The UE performs services in the primary cell.

Step 2: The primary cell detects that the Qos of the service performed by the UE cannot be satisfied. Step 3: The primary cell selects the cell whose remaining resources satisfy the Qos resource requirement of the service performed by the UE according to the information of other cells in the obtained Comp cell. Collecting, and sorting cells in the cell set according to channel quality;

Step 4: The primary cell first sends a service switching request to the cell with the best channel quality (the cell is used as the service switching target cell); the service switching request includes at least the Qos information of the service that is switched by the UE;

Step 5: The target cell receives the service switching request. At this time, the target cell detects that the remaining resources of the UE meet the QoS resource requirements of the service that the UE performs the handover, and establishes a service bearer for the UE, and after the establishment is successful, The cell sends a response message indicating that the establishment is successful;

This step involves the E_RAB setup request and the E_RAB setup response.

Step 6: The primary cell releases the information of the service of the UE on the primary cell.

Step 7: The UE performs a service in the target cell.

In step 5, if the target cell detects that its remaining resources do not meet the demand, it responds with a response message rejecting the rejection; after receiving the response message, the primary cell sends a service switching request to the cell with the best channel quality, and the subsequent process and The process from step five to step seven is the same.

Embodiment 3: A situation in which an uplink service is not satisfied;

It should be noted that the cell information is periodically exchanged between cells in the Comp cell set, and the cell information includes at least the remaining resources.

As shown in FIG. 5, the situation described in Embodiment 3 specifically includes the following steps:

Step 1: The UE performs services in the primary cell.

Step 2: The primary cell detects that the Qos of the service performed by the UE cannot be satisfied. Step 3: The primary cell selects a target cell that performs service switching according to the information of other cells in the obtained Comp cell, and satisfies the remaining resource of the earliest received cell. The business carried out by the UE The cell that is required by the QOS resource is selected as the target cell; before the response message of the successful handover of the primary cell, the cell identifier of the subsequent received resource of the cell that meets the Qos resource requirement of the service performed by the UE is stored, so that the service handover fails. After the next target cell selection;

Step 4: After selecting the target cell that meets the service requirement, the primary cell immediately sends a service switching request to the target cell; the service switching request includes at least the Qos information of the service that the UE performs the handover;

Step 5: The target cell receives the service switching request, establishes a service bearer for the UE, and sends a response message indicating that the establishment is successful to the primary cell after the establishment is successful;

This step involves the E_RAB setup request and the E_RAB setup response.

Step 7: The UE performs a service in the target cell.

In step 5, if the target cell detects that its remaining resources do not meet the service requirements, it returns a response message indicating that the handover fails. At this time, the primary cell selects the next target cell and performs steps 4 to 7.

It should be noted that, in the above embodiment, the primary cell is a cell that is serving services, and the target cell is a coordinated cell. However, in practical applications, a cell that is serving a service may be a primary cell or a coordinated cell, and the target cell may also be a primary cell or a coordinated cell.

As shown in the foregoing embodiment, the process of the service switching operation based on the Comp can be used to represent the process shown in FIG. 6. The process includes the following steps:

Step 610: Confirm that the cell serving as the service has insufficient resources.

Step 620: Switch the service to the target cell that meets the resource requirement in the Comp cell set to which the cell serving the service belongs.

In order to ensure that the above embodiments and operation ideas can be smoothly implemented, the settings shown in FIG. 7 can be performed. Referring to FIG. 7, FIG. 7 is a service switching system based on Comp according to an embodiment of the present invention. The system includes a connected resource statistics unit, a Comp 'J, and a zone switching unit.

In actual application, the resource statistics unit can confirm that the cell serving as the service service has insufficient resources, and notify the Comp cell handover unit of the situation; the Comp cell set to which the cell serving the service belongs by the Comp cell handover unit The service is switched to a target cell that satisfies the resource requirement.

In summary, the present invention is based on the service switching technology of the Comp, which solves the problem of how to perform service switching in multi-point cooperative operation, can improve service quality, improve cell edge throughput, and improve user satisfaction. degree.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

1. A service switching method based on multi-point cooperation Comp, comprising:

2. The method according to claim 1, wherein the target cell is determined by selection, and the selection method is:

Or,

3. The method according to claim 2, wherein

In the first mode, the operation of screening the cell set is performed by a cell serving the service, and the operation of selecting the cell that meets the resource requirement is performed by the user equipment UE or a cell serving the service.

The method according to claim 2 or 3, wherein the method further comprises: in the first mode, when the handover fails, the cell with the remaining resources satisfying the channel quality of the service is used as the target cell, and the method is performed. Business switching.

The method according to claim 2 or 3, wherein the method further comprises: in the second mode, storing, for the cell serving the service, information feedback of other cells in the Comp cell set received subsequently, so as to be in the After the service handover fails, the next handover to the target cell is performed.

6. A service switching system based on Comp, comprising a resource statistics unit and a Comp cell switching unit; wherein

The resource statistics unit is configured to confirm that the cell serving the service has insufficient resources, and The situation is notified to the Comp cell switching unit;

The system according to claim 6, wherein the target cell is determined by selection, and the Comp cell switching unit is configured to:

Or,

8. The system according to claim 7, wherein

In the first mode, the Comp cell switching unit is further configured to: after filtering out the remaining resources to satisfy the cell set of the service:

The system according to claim 7 or 8, wherein the Comp cell switching unit is further configured to:

The system according to claim 7 or 8, wherein the Comp cell switching unit is further configured to: In the second manner, the information feedback of the other cells in the Comp cell set received in the subsequent manner is stored, so that the next handover to the target cell is performed after the service handover fails.