WO2012022268A1

WO2012022268A1 - Method and device for selection of collaborative point

Info

Publication number: WO2012022268A1
Application number: PCT/CN2011/078610
Authority: WO
Inventors: 魏巍
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-08-20
Filing date: 2011-08-18
Publication date: 2012-02-23
Also published as: CN101917217B; CN101917217A

Abstract

The present invention belongs to the field of wireless communications network. Disclosed are a method and device for the selection of a collaborative point. The method comprises: setting for a user terminal a zoning parameter, a threshold thereof, and an intra-zone confirmed location parameter and a threshold thereof (101); receiving from a user terminal transmission a zoning parameter test value and an intra-zone confirmed location parameter test value (102); comparing the zoning parameter test value with the zoning parameter threshold, acquiring a first comparison result, and comparing the intra-zone confirmed location parameter with the intra-zone confirmed location parameter threshold, acquiring a second comparison result (103); on the basis of the first comparison result, confirming the zone where the user client is located, and on the basis of the second comparison result, confirming the intra-zone location where the user terminal is located (104); confirming a collaborative point selection strategy on the basis of the location, selecting a collaborative point on the basis of the collaborative point selection strategy confirmed (105). In the present invention, the maximized use of resources is allowed, inter-cell interferences are reduced.

Description

Method and apparatus for selecting a collaboration point

The present invention relates to a wireless communication network, and more particularly to a method and apparatus for selecting a collaboration point. Background technique

Solving inter-cell user terminals in wireless communication networks in the next generation of broadband wireless communication networks

(User Equipment, UE) throughput and average client throughput, especially the throughput and peak rate of cell edge clients, face serious challenges.

At present, in IEEE 802.16j, IMT-Advanced, WINNER, a multi-point Collaborative Multiple Point (CoMP) transmission/reception method is proposed to solve this problem.

The basic concept of CoMP transmission/reception is the joint transmission and reception between multiple coordinated base stations (Base Stations, BSs) and a single client on the same radio resource. There are two basic characteristics:

(1) Each UE can be jointly served by a plurality of base stations by base station cooperation on the same radio resource. By doing so, the inter-cell interference can be mitigated or changed to useful signal power.

(2) Each base station can serve multiple clients on the same radio resource. By doing so, all sector throughput is improved.

However, in the CoMP transmission/reception implementation process, using the same resource for one client in multiple coordinated base stations may cause waste of resources; in the uplink where inter-cell interference exists, when selecting the same cell at the same time When the edge user performs CoMP transmission/reception, serious inter-cell interference may occur, which in turn causes the cell edge throughput, peak rate, and average cell throughput to be significantly reduced. Summary of the invention

In view of this, in order to make full use of resources and reduce inter-cell interference, the present invention provides a method and apparatus for selecting a coordination point, which can fully utilize resources and reduce inter-cell interference.

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 selecting a collaboration point, including:

Setting the zoning parameter of the user end and its threshold, and the location determining parameter and its threshold in the area;

Receiving, by the user end, a region division parameter measurement value and an intra-area location determination parameter measurement value;

Comparing the measured value of the area division parameter with the threshold value of the area division parameter, and obtaining a first comparison result, comparing the measured value of the position determination parameter in the area with the position determination parameter width value in the area to obtain a second ratio Result

Determining, according to the first comparison result, an area where the user terminal is located, and determining, according to the second comparison result, a location of the user end in an area where the user is located;

A collaboration point selection policy is determined according to the location of the location, and the collaboration point is selected according to the determined collaboration point selection policy.

Further, the area in which the location is located is an intra-cell area; and the determining a collaboration point selection policy according to the location of the location is: statically selecting a collaboration point with the highest spectrum efficiency as a collaboration point selection policy.

Further, the area to be located is an inter-cell area; the determining a collaboration point selection policy according to the location of the location is: first selecting a collaboration point that satisfies the best performance of the user end, and if the number of collaboration points does not meet the requirement, then selecting Collaborative points with high spectral efficiency; select collaboration points with less interference and collaborative points with smaller coordination points, and adopt dynamic selection.

Further, the area division parameter or the intra-area location determination parameter includes at least one of the following parameters or a combination thereof: quality of service, long-term spectrum efficiency, short-term spectrum efficiency, base station load, Interference conditions, interference measurements, and path loss.

Further, after the selecting a collaboration point according to the determined collaboration point selection policy, the method further includes: notifying the client and all other collaboration points.

Further, after the notifying the user terminal and all other collaboration points, the method further includes: the collaboration controller of the other collaboration points dynamically selects the collaboration point according to the measurement of different collaboration points and performance of the client.

The present invention also provides an apparatus for selecting a collaboration point, including:

a setting module, configured to set a region dividing parameter of the user end and a threshold thereof, and a position determining parameter and a threshold value thereof in the region;

a receiving module, configured to receive a measurement value of the area division parameter sent by the user end, and a measurement value of the position determination parameter in the area;

The comparison module is configured to compare the measured value of the area division parameter with the threshold value of the area division parameter to obtain a first comparison result, and perform the measurement value of the position determination parameter in the area and the position determination parameter width value in the area Comparing, obtaining a second comparison result;

a determining module, configured to determine, according to the first comparison result, an area where the user end is located, and determine, according to the second comparison result, a location of the user end in an area where the user is located;

The selection module is configured to determine a collaboration point selection policy according to the location, and select a collaboration point according to the determined collaboration point selection policy.

Further, the area that is located is an intra-area area; the selection module is specifically configured to statically select a collaboration point with the highest spectrum efficiency as a collaboration point selection policy.

Further, the area to be located is an inter-cell area; the selection module is specifically configured to first select a collaboration point that satisfies the best performance of the user end, and if the number of collaboration points does not meet the requirement, select a collaboration point with higher spectrum efficiency. Then select the collaboration points with less interference and the collaboration points with smaller coordination points, and use the dynamic selection method.

Further, the area dividing parameter or the in-area location determining parameter includes at least the following parameters One or a combination of numbers: quality of service, long-term spectral efficiency, short-term spectral efficiency, base station load, interference conditions, interference measurements, and path loss.

Further, the apparatus further includes: a notification module, configured to notify the client and all other collaboration points.

Further, the cooperation point is a macro base station, a micro cell type base station, a repeater or a home base station. In the embodiment of the present invention, the area dividing parameter and the threshold thereof of the user end, and the position determining parameter and the threshold value thereof are set by the user end; and the area dividing parameter measurement value and the in-area position determining parameter measurement value sent by the user end are received; Comparing the measured value of the region dividing parameter with the threshold value of the region dividing parameter, obtaining a first comparison result, comparing the measured value of the position determining parameter in the region with the threshold value of the position determining parameter in the region, and obtaining a second comparison Result: determining an area where the user end is located according to the first comparison result, determining a location of the user end in the area according to the second comparison result; determining a collaboration point selection policy according to the location, according to the determined The collaboration point selection strategy selects the collaboration point, which can effectively divide the coverage area of the collaboration point, and has limited limited areas that need CoMP technology, which significantly reduces the overhead of information that needs to be exchanged between all the collaboration points when CoMP is fully utilized. Use resources to reduce inter-cell interference. DRAWINGS

FIG. 1 is a flowchart of a method for selecting a collaboration point according to an embodiment of the present invention;

2 is a detailed flowchart of a method for selecting a collaboration point according to an embodiment of the present invention; FIG. 3 is a structural diagram of an apparatus for selecting a collaboration point according to an embodiment of the present invention;

FIG. 4 is another structural diagram of an apparatus for selecting a collaboration point according to an embodiment of the present invention. detailed description

The basic idea of the present invention is: setting a region dividing parameter of the user end and a threshold thereof, and determining a position determining parameter and a threshold thereof in the region; receiving a measured value of the region dividing parameter sent by the user end and a measured value of the position determining parameter in the region; The area dividing parameter measurement value and the area Dividing the parameter width values for comparison, obtaining a first comparison result, comparing the intra-area position determining parameter measurement value with the intra-area position determining parameter threshold value, to obtain a second comparison result; determining according to the first comparison result Determining, according to the second comparison result, the location of the user end in the area where the user is located according to the second comparison result; determining a collaboration point selection policy according to the location of the location, and selecting collaboration according to the determined collaboration point selection policy point.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a method for selecting a collaboration point. As shown in FIG. 1, the method includes: Step 101: Set a region partitioning parameter and a threshold thereof of the user end, and a location determining parameter and a threshold thereof in the region.

Step 102: Receive a measurement result of the area division parameter sent by the user end and a measurement value of the position determination parameter in the area.

Step 103: Compare the measured value of the area division parameter with the threshold value of the area division parameter, obtain a first comparison result, compare the measured value of the position determination parameter in the area with the position determination parameter width value in the area, and obtain the first Two comparison results.

Step 104: Determine an area where the user terminal is located according to the first comparison result, and determine a location of the user end in the area according to the second comparison result.

Step 105: Determine a collaboration point selection policy according to the location of the location, and select a collaboration point according to the determined collaboration point selection policy.

Further, the area where the location is the intra-cell area; correspondingly, determining the collaboration point selection policy according to the location of the location, including: statically selecting the collaboration point with the highest spectrum efficiency as the collaboration point selection policy.

Further, the area where the location is the inter-cell area; correspondingly, determining the collaboration point selection policy according to the location of the location, including: First, selecting a collaboration point that satisfies the best performance of the user end, If the collaboration point (the number does not meet the requirements (for example, 3 collaboration points need to be selected according to the selection strategy, but only 2 can be selected when the coordination point selection for the best performance is met, the number is not met at this time), then the spectrum is selected. More efficient collaboration points; Secondly, select collaboration points with less interference and collaborative points with smaller coordination points, and use dynamic selection.

Further, the area division parameter or the intra-area position determination parameter includes at least one of the following parameters or a combination thereof:

Quality of Service, Long-Term Spectrum Efficiency, Short-Term Spectrum Efficiency, Base Station Load, Interference Conditions, Interference Measurements, and Path Loss.

Further, after the step of selecting a collaboration point according to the determined collaboration point selection policy, the method further includes:

Notify the client and all other collaboration points.

Further, after the step of notifying the user end and all other collaboration points, the method further includes: the other collaboration point dynamically selecting the collaboration point according to the measurement of the performance of the different collaboration points and the user end.

The cooperation point may be a macro base station, a micro cell type base station, a repeater, a home base station, or the like.

The invention is described in detail below with reference to the accompanying drawings, and the accompanying drawings, and the accompanying drawings. In the embodiment, the cooperation point is exemplified by the macro base station, and the working principle of other types of cooperation points is similar, and details are not described herein again.

As shown in FIG. 2, an embodiment of the present invention provides a method for selecting a collaboration point, including: Step 201: A serving base station sets a region division parameter and a threshold value thereof for dividing a coverage area, and an intra-area location determination parameter and Wide value.

The zoning parameter may be the same as or different from the intra-area location determining parameter, including one or a combination of the following parameters: quality of service, long-term spectral efficiency, short-term spectral efficiency, base station load, interference condition, interference measurement value, and path loss. Further, the serving base station may divide the area covered by the serving base station according to the area division parameter, for example, may be divided into an inter-cell area and a small area area, but is not limited thereto. For example, one can be divided into inter-cell areas, transition areas, and small area areas, and different strategies are used for the three areas; second, each large area can be divided into different small areas, for example, the inter-cell area is divided into There are three different levels, and there are significant differences between the three different levels, such as the low-range interference from high to low. In principle, there are various types of division. For example, according to parameter division, it can also be divided according to coverage size. For example, within 100 meters coverage is an intra-cell area, and over 100 meters is an inter-cell area, which will be described below. When using CoMP, it is necessary to consider the signaling interaction between all the collaboration points and the UE, and the signaling interaction must be performed between all the collaboration points and the UE, if the cell coverage is large, When the client uses CoMP, the number of signaling interaction between the collaboration point and the client side obviously increases proportionally. At the same time, the types of signaling interaction between different collaboration points and the client end are different, and a large number of signaling types are The overhead of interactive systems on the network must increase. If zoning is performed, CoMP can be performed only in the determined area, for example, the inter-cell area in the example of the present invention. First, the number of users accommodated in the area is reduced, and at the same time, the user of the same policy is used. The same type of signaling greatly reduces the number of signaling types, and accordingly, the overhead is reduced after the introduction of the area division. Further, the serving base station may determine a specific location of the UE in a certain area according to the location determining parameter in the area, which will be described in detail below.

Step 202: The serving base station sets a collaboration point selection policy at different locations.

Specifically, the serving base station selects different collaboration point selection policies for different locations:

1) For intra-cell areas, because inter-cell interference conditions are small and service quality is good, unless there are special requirements, for example, the service base station is heavily loaded, requires high spectrum efficiency, and the user performance requirements are greatly improved, otherwise , Cooperative multipoint transmission/reception is not used. If CoMP technology is used, the most efficient spectrum coordination point is selected, and it is static, that is, it does not change after selection. 2) For the inter-cell area, since the transmission power and performance of different types of base stations, femto base stations (Femto), home base stations, and home information machines are greatly different in a heterogeneous network, The coordination point should take into account the compromise between user performance requirements, spectrum efficiency, base station load, interference status, etc. For example, the specific method is as follows, but not limited to this method, first select the coordination point that satisfies the best performance of the user end, if cooperation If the number of points does not meet the requirements, then the coordination points with higher spectral efficiency are selected; the second is the coordination point with less interference and the cooperation point with less load on the base station. At the same time, the dynamic method is adopted, that is, according to the user end and collaboration. The point status can be changed dynamically.

Step 203: The UE measures the measurement value of the area division parameter of the coverage area determined by the neighboring base station, and reports the value to the serving base station.

Step 204: The serving base station compares the measurement value of the area division parameter with the threshold value of the area division parameter to obtain a first comparison result, and determines an area where the user end is located according to the first comparison result.

For example, taking inter-cell interference as an example, when the inter-cell interference measurement value is greater than the threshold value, it corresponds to the small-area area, otherwise, it is the intra-cell area.

Step 205: The UE measures the measured value of the location determining parameter in the area determined by the serving base station, and reports the measured value to the serving base station.

Step 206: The serving base station compares the measured value of the position determining parameter in the area with the position determining parameter threshold in the area to obtain a second comparison result, and determines a specific location of the user end in a certain area according to the second comparison result.

Taking inter-cell interference as an example, step 206 is only to refine the location. When the inter-cell interference measurement value is greater than the threshold value, according to step 204, it is determined that the user end is in the inter-cell area; in step 206, the location is determined according to the inter-cell interference. The information is compared to the threshold, which is obviously greater than the zoning threshold of step 204.

Step 207: The serving base station determines a collaboration point selection policy according to the location of the user end.

Specifically, for the intra-cell area, due to the small inter-cell interference condition and good service quality, Therefore, unless there are special requirements, for example, the service base station is heavily loaded, requires high spectrum efficiency, and the performance requirements of the client are greatly improved, otherwise, coordinated multi-point transmission/reception is not used.

CoMP technology, then, selects the most efficient point of collaboration for the spectrum, and is static, ie, does not change after selection.

For the inter-cell area, since the transmission power and performance of different types of macro base stations, micro-cell base station repeaters, and home base stations are greatly different in a heterogeneous network, consideration should be given when selecting a coordination point. A compromise to the performance requirements of the client, spectrum efficiency, base station load, interference status, etc., for example, the specific method is as follows, but is not limited to this method, first select a collaboration point that satisfies the best performance of the user end, if the number of collaboration points does not meet the requirements Then, the coordination point with higher spectral efficiency is selected; the second is the coordination point with less interference condition and the cooperation point with less load on the base station, and at the same time, the dynamic method is adopted, that is, the selection can be dynamic according to the status of the user end and the cooperation point. change.

Step 208: The serving base station selects a collaboration point according to the collaboration point selection policy, and notifies all the cooperation points and the user end.

Step 209: Set the collaboration controller in different types of collaboration points.

Step 210: The collaboration point dynamically selects a collaboration point according to the measurement of different collaboration points and client performance, and notifies other collaboration points and the user end to complete the selection and switching of the collaboration point.

Specifically, different collaboration controllers are set in different types of collaboration points, and the collaboration controller may adjust different collaboration point selection policies. After the serving base station determines the collaboration point of the user end, all the collaboration points are notified, and the collaboration points are The collaboration controller determines whether it is necessary to increase or decrease the collaboration point according to its preset selection policy. If a new collaboration point needs to be added to meet the performance requirements of the client, the collaboration controller of the collaboration point adds a new collaboration point. There is no need to add new collaboration points, then the collaboration point will notify the client to complete the selection and switching of the collaboration points.

It should be noted that the order of step 201 and step 202 can be interchanged. Step 203 and step 205, the UE may report the measured area division parameter measurement value and the intra-area position determination parameter measurement value to the serving base station, and then compare by the serving base station. Based on the same inventive concept, the embodiment of the present invention provides a device for selecting a collaboration point. As shown in FIG. 3, the method includes:

a setting module 301, configured to set a region dividing parameter of the user end and a threshold thereof, and an in-region location determining parameter and a threshold thereof;

The receiving module 302 is configured to receive the area dividing parameter measurement value sent by the user end and the intra-area position determining parameter measurement value;

The comparison module 303 is configured to compare the area division parameter measurement value with the area division parameter threshold value to obtain a first comparison result, and compare the intra-area position determination parameter measurement value with the intra-area position determination parameter threshold value. Yes, the second comparison result is obtained;

The determining module 304 is configured to determine, according to the first comparison result, an area where the user terminal is located, and determine, according to the second comparison result, a location of the user end in the area where the user is located;

The selection module 305 is configured to determine a collaboration point selection policy according to the location of the location, and select a collaboration point according to the determined collaboration point selection policy.

Further, the area where the location is is an intra-cell area;

Correspondingly, the selection module 305 is specifically configured to statically select the collaboration point with the highest spectral efficiency as the collaboration point selection strategy.

Further, the area where the location is is an inter-cell area;

Correspondingly, the selecting module 305 is specifically configured to: first select a collaboration point that satisfies the best performance of the user end, and if the number of the collaboration points does not meet the requirement, select a collaboration point with higher spectral efficiency; secondly, select a less interference situation. Collaboration points and collaboration points are less loaded with collaboration points, and at the same time, dynamic selection is used.

Quality of service, long-term spectral efficiency, short-term spectral efficiency, base station load, interference conditions, interference measurements, and path loss. Further, as shown in FIG. 4, the apparatus further includes: a notification module 306, configured to notify the client and all other collaboration points.

Further, the cooperation point is a macro base station, a micro cell type base station, a repeater, and a home base station. The technical solution of the present invention sets the area dividing parameter of the user end and the threshold value thereof, and the position determining parameter and the threshold value thereof in the area; receiving the area dividing parameter measurement value sent by the user end and the position determining parameter measurement value in the area; The measured value of the regional division parameter is compared with the threshold value of the regional division parameter, and the first comparison result is obtained, and the measured value of the position determination parameter in the region is compared with the threshold value of the position determination parameter in the region to obtain a second comparison result; Determining, according to the first comparison result, an area where the user end is located, determining a location of the user end in the area according to the second comparison result; determining a collaboration point selection policy according to the location of the location, according to the determined collaboration point Selecting a strategy to select a collaboration point can effectively divide the coverage area of the collaboration point, and limited the area that requires CoMP technology, which significantly reduces the overhead of information that needs to be exchanged between all collaboration points when CoMP is used, and can fully utilize resources. , reducing inter-cell interference; dynamic/static selection of collaboration points In combination, the system overhead is further reduced. At the same time, because different types of collaboration points in the heterogeneous network set the collaboration controller, the overhead of information that needs to be exchanged at the relevant collaboration point when the collaboration point needs to be reselected and switched is effectively reduced.

The above description shows and describes a preferred embodiment of the present invention, but as described above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be construed as Other combinations, modifications, and environments are possible and can be modified by the teachings or related art or knowledge within the scope of the inventive concept described herein. The modifications and variations made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

Claim

A method for selecting a collaboration point, the method comprising:

2. The method according to claim 1, wherein the area where the location is is an intra-cell area;

The determining the collaboration point selection policy according to the location of the location is: Statically selecting the spectrum efficiency The collaboration point with the highest is the collaboration point selection policy.

3. The method according to claim 1, wherein the area in which the area is located is an inter-cell area;

The determining the collaboration point selection policy according to the location of the location is: first selecting a collaboration point that satisfies the best performance of the user end, and if the number of collaboration points does not meet the requirement, selecting a collaboration point with a higher spectrum efficiency; Less collaboration points and collaboration points load smaller collaboration points, and use dynamic selection.

The method according to any one of claims 1 to 3, wherein the area division parameter or the intra-area position determination parameter comprises at least one of the following parameters or a combination thereof: Quality of service, long-term spectral efficiency, short-term spectral efficiency, base station load, interference conditions, interference measurements, and path loss.

The method according to any one of claims 1 to 3, wherein after the selecting a collaboration point according to the determined collaboration point selection policy, the method further comprises: notifying the user terminal and all other collaborations point.

The method according to claim 5, wherein after the step of notifying the user end and all other cooperation points, the method further comprises:

The collaboration controllers of the other collaboration points dynamically select collaboration points based on measurements of different collaboration points and client performance.

7. A device for selecting a collaboration point, the device comprising:

The device according to claim 7, wherein the area where the location is is an intra-cell area;

The selection module is specifically configured to statically select a collaboration point with the highest spectral efficiency as a collaboration point selection strategy.

9. The apparatus according to claim 7, wherein the area in which the area is located is an inter-cell area;

The selection module is specifically configured to first select a collaboration point that satisfies the best performance of the user end. If the number of collaboration points does not meet the requirements, select a collaboration point with higher spectrum efficiency; and then select a collaboration point and a collaboration point with less interference status. Load smaller collaboration points and use dynamic selection.

10. Apparatus according to any one of claims 7 to 9, wherein the area division parameter or the intra-area position determination parameter comprises at least one of the following parameters or a combination thereof:

The device according to any one of claims 7 to 9, wherein the device further comprises: a notification module, configured to notify the client and all other collaboration points.

The apparatus according to any one of claims 7 to 9, wherein the cooperation point is a macro base station, a micro cell type base station, a repeater or a home base station.