WO2011020308A1

WO2011020308A1 - Method and system for user terminals to implement access in a relay network

Info

Publication number: WO2011020308A1
Application number: PCT/CN2010/070050
Authority: WO
Inventors: 魏巍
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-08-18
Filing date: 2010-01-07
Publication date: 2011-02-24
Also published as: CN101998658A

Abstract

The present invention provides a method and a system for user terminals to implement access in a relay network. A base station classifies relay stations to which user terminals are attached, according to various performance requirement objectives (100); when a user terminal initiates an access request, a relay station permits the user terminal according with the performance requirement to access to the relay network (101). By the method of the present invention, cell selection and handover of corresponding user terminals are realized according to various performance requirements. In the scene where a mass of cell selection and handover are required, duration of cell selection and handover of user terminals in the relay network is reduced, thus efficiency that user terminals access to the relay network is improved.

Description

Method and system for realizing access of user terminal in relay network

The present invention relates to a relay network technology, and more particularly to a method and system for implementing access by a user terminal in a relay network. Background technique

In the next generation of broadband wireless communication networks, in order to solve indoor coverage models such as subway stations, tunnels or underground in the base station (BS), as well as some temporary application models, application models such as mobile vehicles, or coverage of cell edge users. Problems such as throughput. At present, the use of relay stations (RS, Relay Station) has been proposed in IEEE 802.16j, Advanced International Mobile Telecommunications (IMT-Advanced), and WINNER. The addition of RS reduces the complexity of system startup compared to the addition of base station BSs in areas where coverage defects exist, and further reduces the complexity of the overall system by minimizing RS complexity.

Where, when the RS needs to be added/removed in the network, the RS is added/removed on the existing communication path by scanning, environment monitoring and ranging (Ranging), or the new RS is logged in/re-login, the RS and the RS are attributed to the RS. All user terminals (UTs) need to perform batch cell selection and handover before the UT can access the relay network.

However, the method for implementing cell selection and handover by the UT is performed separately for each UT. Thus, for a scenario in which cell selection and handover needs to be performed in batches, the time of cell selection and handover of the UT in the relay network is undoubtedly increased significantly. Therefore, the access efficiency of the UT is lowered. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method for implementing access by a user terminal in a relay network, which can improve the efficiency of the UT accessing the relay network. Another object of the present invention is to provide a system for implementing access by a user terminal in a relay network, which can improve the efficiency of the UT accessing the relay network.

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

The present invention provides a method for a user terminal to implement access in a relay network, the method comprising: the base station grouping, according to different performance requirement targets, a relay station to which the user terminal belongs to obtain a relay station performance group identifier; and when the user terminal initiates access When requested, the relay station determines, according to the relay station performance group identifier, whether the user terminal that initiates the access request meets performance requirements, and allows the user terminal that meets the performance requirement to access the relay network.

The grouping the relay stations to which the user terminal belongs to obtain the relay station performance group identifier includes: the base station groups the relay stations to which the user terminal belongs, each relay station group has different performance requirement targets, and the base station is a different relay station. The packet respectively sets a relay station performance group identifier; the base station notifies the set relay station performance group identifier to the relay station, respectively.

In the above method, when the user terminal initiates an access request, the user terminal that allows the user terminal that meets the performance requirement to access the relay network includes: the relay station compares the performance of the relay station performance group identifier with the performance classification of the user terminal, and When the performance requirement is met, the relay station allows the user terminal to access the relay network and notify the user terminal of the relay station performance group identifier.

When the UT initiates an access request, the handover mode in the relay network includes: the active cell selection and handover request initiated by the base station or the relay station, or the passive cell selection and handover initiated by the user terminal through its own measurement. request.

In the above method, the base station or the relay station initiates the active cell selection and the handover request includes: the base station or the relay station determines, according to the performance indicator, the user terminal that needs to perform active cell selection and handover; the base station or the relay station needs to perform cell selection. Initiating a request with the handed-over user terminal, after receiving the request, the user terminal starts cell selection and determines the destination or destination relay station of the handover, and switches to the destination base station or the destination relay station; the destination base station or the destination relay station is The switched user terminal reassigns the identity.

The base station or the relay station initiating the active cell selection and handover request includes: the base station or the relay station determining, according to the performance indicator, a user terminal that needs to perform active cell selection and handover; the base station or the relay station performs cell selection and determines to perform handover. The destination base station or the destination relay station; the base station or the relay station initiates a request to the user terminal that needs to perform cell selection and handover, and after receiving the request, the user terminal switches to the destination base station or the destination relay station; the destination base station or the destination relay station is after the handover The user terminal reassigns the identity.

In the above method, when the user terminal initiates a passive cell selection and handover request by using the measurement, the base station or the relay station is used to select a destination base station or a destination relay station for the user terminal in advance; or, the current cell selection of the user terminal is adopted. Switch mode.

The method further includes: the base station dynamically changing the relay station performance group identifier for the relay station according to performance requirements.

Correspondingly, the present invention provides a system for implementing access by a user terminal in a relay network, including a base station, a relay station, and a user terminal;

a base station, configured to group, according to different performance requirement targets, a relay station to which the user terminal belongs;

The relay station is configured to allow the user terminal that meets the performance requirement to access the relay network when the user terminal initiates the access request.

In the above system, the base station or the relay station is further configured to initiate an active cell selection and handover request.

The user terminal is further configured to initiate a passive cell selection and switching request by using its own measurement.

The base station is further configured to dynamically change the relay station performance group identifier for the relay station according to performance requirements.

It can be seen from the technical solution provided by the above invention that the base station according to different performance requirements The target station is grouped by the relay station to which the user terminal belongs. When the user terminal initiates the access request, the relay station allows the user terminal that meets the performance requirement to access the relay network. Through the method of the invention, the cell selection and handover of the corresponding UT are implemented according to different performance requirements, and the scenario of cell selection and handover of the UT in the relay network is reduced, thereby improving the time of cell selection and handover of the UT in the relay network, thereby improving The efficiency of the UT accessing the relay network. DRAWINGS

1 is a schematic flow chart of a method for implementing cell selection and handover by a user terminal in a relay network according to the present invention;

2 is a schematic diagram of a process for initiating active cell selection and handover request by a BS or RS according to the present invention to implement UT access;

FIG. 3 is a schematic diagram of a process in which a UT initiates a passive cell selection and handover request through its own measurement to implement UT access. detailed description

1 is a schematic flowchart of a method for a cell terminal to implement cell selection and handover in a relay network according to the present invention. As shown in FIG. 1, the method includes the following steps:

Step 100: The base station groups the relay stations to which the user terminal belongs according to different performance requirement targets.

The RS-equipped relay network groups the RSs to which the user terminals belong through the BS. Each RS packet has different performance requirement targets, and the BS sets identifiers for different RS packets, that is, RS performance group identifiers. And, the BS also notifies the RS of the RS performance packet identifier.

Step 101: When the user terminal initiates an access request, the relay station allows the user terminal that meets the performance requirement to access the relay network.

When the UT initiates an access request, the RS compares the RS performance packet identifier with the performance classification of the UT, and determines whether the RS performance packet identifier and the UT performance classification are the same. Whether the UT that requests the access meets the performance requirements of the relay network, that is, the RS performance packet identifier is the same as the performance classification of the UT, indicating that the UT that initiates the access request meets the performance requirements of the relay network. If the performance requirements are met, the RS allows the UT to access the trunk network and inform the UT of the RS performance packet identifier.

It should be noted that when the UT initiates an access request, there are two types of handovers in the relay network, namely active cell handover and passive cell handover, namely: BS or RS due to interference, load status, throughput, Active cell selection and handover requests initiated by performance reasons such as peak rate, and passive cell selection and handover requests initiated by the UT through its own measurements. The two types of switching are described as follows:

A. When the BS or the RS initiates the active cell selection and handover request, first, the BS or the RS determines the UT that needs to perform active cell selection and handover according to the set performance indicators such as interference, load status, throughput, and peak rate; further In order to reduce the delay of UT cell selection and handover, the BS or the RS may first determine the destination BS or the destination RS that needs to be selected and switched; then, the BS or RS initiates a request to the UT that needs cell selection and handover, and the UT receives the request. After the request, the cell selection is started, and then the destination BS or the destination RS is switched. The destination BS or the destination RS may be determined previously, or may be determined at this time. Finally, the destination BS or the destination RS is after the handover. UT reassigns the identity.

B. When the UT initiates a passive cell selection and handover request through its own measurement, the UT can also adopt the current cell selection and handover mode of the UT.

In order to use the RS flexibly, the BS can dynamically change the RS performance group identifier for the RS, so that the UTs of different performance requirements are selected and accessed to the BS or the RS, so that the BS and the RS cooperate. Under the premise of improving the performance such as throughput and peak rate, the interference can be effectively reduced, so that the load of the BS and the RS are balanced. For example: For system performance requirements, RS needs to absorb high-throughput users, so the BS dynamically changes the RS performance group identifier, so that the RS performance group identifier is expressed as only absorption. High throughput users. Here, the high throughput is determined by a threshold, and the threshold is determined by

The BS is predetermined. Embodiment 1

Referring to FIG. 2, the following describes the process of the active cell selection and handover request initiated by the BS or the RS to implement the UT access. As shown in FIG. 2, the following steps are included:

Step 200: The BS or the RS determines a performance indicator of the active cell selection and the handover request, and sets a performance threshold comparison threshold between the active cell selection and the handover;

Wherein the performance indicator compares a threshold

Step 201: The BS groups the RSs to which the user equipment belongs, and sets the RS performance group identifiers for different RS packets respectively.

Wherein, since each RS packet has different performance requirement targets, the BS sets the RS performance group identifiers for different RS packets respectively. The RS performance grouping identifier determines the user category that the RS can absorb, and the user category is determined by performance indicators such as throughput, peak rate, load, and the like.

Step 202: The UT measures the performance indicator determined by the BS, and sends the performance indicator determined by the RS to the BS; or the RS determines the performance indicator determined by the RS, and reports it to the RS;

Step 203: The BS compares the performance index with the threshold value and the measured value. If the measured value reaches the performance index comparison threshold, the RS initiates a request to the RS that needs to perform the active cell selection and the handover request. Alternatively, the RS compares the performance indicator with the threshold and the measured value. If the measured value reaches the performance indicator comparison threshold, the request is initiated to the UT that needs to perform the active cell selection and handover request;

Step 204: The BS selects the destination BS for the RS that needs to perform active cell selection and handover according to the comparison result of the performance index and the measured value. Alternatively, the RS compares the threshold value with the measured value according to the performance index, and needs to be in advance. UT selection destination RS for active cell selection and handover;

Step 205: The BS negotiates with the destination BS to determine a handover point, and notifies the corresponding UT; or, RS Negotiating with the destination RS to determine a switching point, and notifying the corresponding UT;

Step 206: The BS or the RS disconnects from the UT, and connects the UT to the destination BS or the destination RS at the designated switching point; the destination BS or the destination RS reassigns the identifier to the switched RS or UT. Embodiment 2

The above describes the process in which the BS or RS initiates active cell selection and handover requests to implement UT access. Here, with reference to FIG. 3, the UT can initiate a passive cell selection and handover request by its own measurement to implement the UT access process. As shown in FIG. 3, the following steps are included:

Step 300: The BS or the RS determines a performance indicator of the active cell selection and the handover request, and sets a performance indicator comparison threshold of the active cell selection and the handover;

Step 301: The BS groups the RSs to which the user equipment belongs, each RS packet has a different performance requirement target, and the BS sets an RS performance group identifier for different RS packets.

Step 302: The UT or the RS initiates a passive cell selection and handover request.

Step 303: The BS or the RS receives the request, and determines a passive cell selection and switching mode of the UT or the RS;

The passive cell selection and handover mode of the UT or the RS includes: a negotiation mode, a regular cell selection and a handover operation, and the like.

Step 304: The BS or the RS disconnects the current connection of the UT or the RS, and accesses the destination BS or the destination RS by using a negotiation mode or a conventional cell selection and handover operation;

Step 305: The destination BS or the destination RS reassigns the identifier to the RS or UT after the handover.

In order to implement the foregoing method, the present invention further provides a system for implementing access by a user terminal in a relay network, including: a base station, a relay station, and a user terminal;

The base station is configured to group the relay stations to which the user terminal belongs according to different performance requirement targets.

The relay station is configured to allow the user terminal that meets the performance requirement to access the relay network when the user terminal initiates the access request. The system base station or the relay station is further configured to initiate an active cell selection and a handover request.

The user terminal is further configured to initiate a passive cell selection and a handover request by using the self measurement.

In the above system, the base station is further configured to dynamically change the relay station performance group identifier for the relay station according to performance requirements.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A method for implementing access by a user terminal in a relay network, characterized in that the method comprises:

The base station groups the relay stations to which the user terminal belongs according to different performance requirement targets, and obtains the relay station performance group identifier;

When the user terminal initiates the access request, the relay station determines whether the user terminal that initiated the access request meets the performance requirement according to the relay station performance group identifier, and allows the user terminal that meets the performance requirement to access the relay network.

The method according to claim 1, wherein the grouping the relay stations to which the user terminal belongs, and obtaining the relay station performance group identifier comprises:

The base station groups the relay stations to which the user terminal belongs, each relay station group has a different performance requirement target, and the base station separately sets a relay station performance group identifier for different relay station groups;

The base station notifies the set relay station performance group identifier to the relay station.

The method according to claim 2, wherein the relay station allows the user terminal that meets the performance requirement to access the relay network, including:

The relay station compares the relay station performance group identifier with the performance classification of the user terminal. When the performance requirement is met, the relay station allows the user terminal to access the relay network, and notifies the user terminal of the relay station performance group identifier.

The method according to claim 3, wherein, when the UT initiates an access request, the handover manner in the relay network includes:

The active cell selection and handover request initiated by the base station or the relay station, or the passive cell selection and handover request initiated by the user terminal through its own measurement.

The method according to claim 4, wherein the initiating the active cell selection and handover request by the base station or the relay station comprises: Determining, by the base station or the relay station, a user terminal that needs to perform active cell selection and handover according to performance indicators;

The base station or the relay station initiates a request to the user terminal that needs to perform cell selection and handover, and after receiving the request, the user terminal starts cell selection and determines the handover destination base station or destination relay station, and switches to the destination base station or the destination relay station;

The destination base station or the destination relay station reassigns the identifier to the switched user terminal.

The method according to claim 4, wherein the initiating the active cell selection and handover request by the base station or the relay station comprises:

Determining, by the base station or the relay station, a user terminal that needs to perform active cell selection and handover according to performance indicators;

The base station or the relay station performs cell selection and determines a destination base station or a destination relay station that performs handover;

The base station or the relay station initiates a request to the user terminal that needs to perform cell selection and handover, and after receiving the request, the user terminal switches to the target base station or the destination relay station;

The method according to claim 4, wherein when the user terminal initiates a passive cell selection and handover request by using its own measurement, the base station or the relay station is used to preselect a destination base station or a destination relay station for the user terminal. Or, adopt the current cell selection and switching mode of the user terminal.

8. The method according to claim 1, wherein the method further comprises: the base station dynamically changing the relay station performance group identity for the relay station according to performance requirements.

A system for implementing access by a user terminal in a relay network, comprising: a base station, a relay station, and a user terminal;

a base station, configured to group, according to different performance requirement targets, a relay station to which the user terminal belongs; The relay station is configured to allow the user terminal that meets the performance requirement to access the relay network when the user terminal initiates the access request.

The system according to claim 9, wherein the base station or the relay station is further configured to initiate a active cell selection and handover request.

The system according to claim 9, wherein the user terminal is further configured to initiate a passive cell selection and handover request by using the self measurement.

The system according to claim 9, wherein the base station is further configured to dynamically change the relay station performance group identifier for the relay station according to performance requirements.