WO2010108346A1

WO2010108346A1 - Method and device for estimating the disturbance of resource blocks

Info

Publication number: WO2010108346A1
Application number: PCT/CN2009/072736
Authority: WO
Inventors: 魏巍
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-03-27
Filing date: 2009-07-13
Publication date: 2010-09-30
Also published as: CN101848540A; CN101848540B

Abstract

A method for estimating the disturbance of Resource Blocks (RBs) is provided. This method includes the steps of that: a controlling terminal divides all RBs counted into plurality of RB subsets according to the determined gridding means of RBs; the controlling terminal counts the disturbance condition of each RB subset according to the determined statistical means of the disturbance condition of RB subsets, and obtains the statistical result of the disturbance condition of each RB subset; the controlling terminal carries out the centrality process on the statistical result of the disturbance condition of all RB subsets according to the determined centrality process means, and obtains the statistical result of the disturbance of all RBs. A device for estimating the disturbance of RBs is also provided. Based on this method and device, the cost of a system may be reduced.

Description

Resource block interference estimation method and device

TECHNICAL FIELD The present invention relates to inter-cell interference technologies in the field of wireless communications, and in particular, to a resource block interference estimation method and apparatus. BACKGROUND In the next generation broadband wireless communication network, solving inter-cell interference becomes a key factor for improving the throughput of the user terminal (UT, User Terminal) and the average UT throughput, and how to effectively solve the inter-cell interference 4 is particularly grim. The battle. At present, in the IEEE, Institute of Electrical and Electronics Engineers (802.16j, Advanced International Mobile Telecommunications (IMT-Advanced) system, WINNER, interference randomization, interference coordination, interference cancellation, etc. are proposed. The method solves the problem of inter-cell interference. However, in order to achieve the purpose of solving inter-cell interference, it is also necessary to accurately and efficiently measure the inter-cell dry 4 in the wireless communication system. In the Long Term Evolution (LTE) of the 3rd Generation Partnership Project (3GPP), different resource blocks (RBs) are inconsistent due to inter-cell interference. At present, the inter-cell interference received by the RB can be estimated by the reference symbol, but since the reference symbol is transmitted in each cell and the data signal is transmitted only in a subset of the cell, the RB ratio data including the reference symbol The RB on the channel is subject to stronger inter-cell interference. Therefore, using the reference symbols to estimate the inter-cell interference experienced by the RB, the result is very inaccurate and also has a negative impact on the throughput of the system. In order to obtain a more accurate inter-cell interference estimation for the RB, the prior art uses a base station (BS, Base Station) to notify the UT of unused RBs by using downlink signaling. However, this method introduces a large signaling overhead: If a UT allocates a bandwidth of 7 RB groups, and each RB corresponds to 1 bit of information, the information is used to notify the UT whether the RB group is used, When the UT occupies the allocated bandwidth, 7 bits of information are required. SUMMARY OF THE INVENTION In view of this, the main object of the present invention is to provide an RB interference estimation method and apparatus for performing more accurate inter-cell interference estimation on RBs, and at the same time, reducing system overhead. According to an aspect of the present invention, a resource block interference estimation method is provided. The method for estimating a resource block according to the present invention includes: the control terminal divides all the resource blocks that are counted into a plurality of resource block subsets according to the determined resource block meshing manner; and the foregoing control terminal determines the data. The resource block subset is subject to the interference status statistical method, and the interference state of each resource block subset is statistically obtained, and the statistical result of the interference state of each resource block subset is obtained; the above control terminal is determined according to the determined centralized processing mode, The statistical results of all the resource block subsets are processed in a centralized manner to obtain the dry ί statistic results of all resource blocks. When the control terminal is a base station, all resource blocks that are counted are: all resource blocks occupied by the user terminal in the data channel, which are counted by the base station; when the control terminal is a relay station, all resource blocks that are counted are: All resource blocks occupied by the relay station that are themselves occupied in the data channel. The method further includes: the control terminal separately labels each resource block subset, the label is used to uniquely mark only one RB subset. When the control terminal is a base station, the method further includes: the base station transmitting the interference estimation result of all resource blocks to the user terminal; when the control terminal is a relay station, the method further includes: the interference estimation result of the resource block of the relay station Give it to the base station. When the control terminal is a base station, the resource block meshing mode, the resource block subset interference state statistical mode, and the centralized processing mode are determined by the base station; when the control terminal is a relay station, the resource block meshing mode and the resource block The statistical mode and the centralized processing mode of the set 4 are determined by the base station and sent to the relay station. When the control terminal is a relay station, the method further includes: the relay station is based on the resource delivered by the base station The source block gridding method, the resource block subset is subjected to the statistics, and the centralized processing method, and the resource block gridding mode used by the resource block, the resource block subset is subjected to the statistics, and the centralized processing is performed. The way, and ~3⁄4 to the above base station. According to another aspect of the present invention, a resource block interference estimating apparatus is also provided. The resource block interference estimating apparatus according to the present invention includes: a subset dividing module, a subset interference counting module, and a centralized processing module. The subset partitioning module is configured to divide all the resource blocks that are counted into multiple resource block subsets according to the determined resource block meshing manner; the subset interference statistics module is configured to determine the resource block subset according to the determined According to the statistical method of the interference status, the interference state of each resource block subset is counted, and the statistical result of the interference state of each resource block subset is obtained; the centralized processing module is used for the centralized processing method determined by the data, for all The statistical results of the interference status of the subset of resource blocks are processed centrally, and the interference statistics results of all resource blocks are obtained. Preferably, the subset dividing module is further configured to label each of the divided resource block subsets, and the label is used to uniquely mark only one RB subset. The device further includes: a statistical result sending module, configured to send the interference estimation result of all the resource blocks to the user terminal, or report the result to the base station. According to the RB interference estimation method and apparatus disclosed by the present invention, reasonable grid management is performed on all RBs, and all RBs are divided into a suitable number of RB subsets; and, for all RB subsets, 4 In particular, statistical results are processed centrally, such as by joint coding. Therefore, the results of the estimation of all the RBs of the obtained RBs can more accurately reflect the current situation of all the RBs of the RBs, and can reduce the occupied letters when notifying the UT or the BS of the results of the special estimation. Other features and advantages of the present invention will be set forth in the description which follows, and in part It can be realized and obtained by a structure which is particularly pointed out in the written description, the claims, and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flowchart of interference estimation performed by a BS on a RB occupied by a UT in a data channel according to an embodiment of the present invention; FIG. 2 is a diagram showing an RS interference on an RB occupied by itself in a data channel according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of an apparatus for estimating RB interference according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The RB 4 estimation method of the present invention is applicable to both a wireless communication network and a wireless communication network with a relay station (RS, Relay Station), and is particularly suitable for use in a downlink channel. RB interference estimation. The RB interference estimation method of the present invention can be divided into two parts. One is that the control terminal BS performs interference estimation on the RB occupied by the UT in the data channel. First, the control terminal RS performs interference estimation on the RB occupied by the data channel. . The RB interference estimation refers to an estimate of the inter-cell interference received by the RB. The embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments. The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. The process of estimating the RBs occupied by the UT in the data channel by the BS in the present invention is illustrated by a specific embodiment. As shown in FIG. 1, the process includes: Step 101: The BS statistics UT is occupied in the data channel. The total number of RBs.

All RBs occupied by the UT in the data channel include: RBs that have been used by the UT and unused RBs in the data channel allocated by the BS for the UT. The implementation of this step is prior art and will not be described here. Step 102: The BS divides all RBs occupied by the UT in the data channel into multiple RB subsets according to the determined RB meshing method. In the present invention, all RBs occupied by the UT in the data channel are meshed and managed, and all RBs are divided into multiple RB subsets. Specifically, the RB meshing method can be set according to requirements, wherein the two extreme meshing methods are respectively: First, all RBs occupied by the UT are divided into one RB subset, in which case, After the RB interference estimation is performed on the RB subset, the BS obtains an RB interference estimation result, and when the interference estimation result is notified to the UT by signaling, only one signaling is required, so that the system overhead is the smallest, but it is reflected. The RB is occupied by all the RBs with the lowest accuracy. The first is to divide each RB occupied by the UT into one RB subset. At this time, the number of RB subsets is the most, and the BS performs corresponding according to multiple RB subsets. The interference estimation results in multiple RB interference estimation results, so that the accuracy of all RB interference states occupied by the UT is the highest, but when the BS transmits multiple interference estimation results to the UT by signaling, It takes a lot of signaling, which causes a huge system overhead. Therefore, the selection of the number of RB subsets needs to take into account the balance between interference estimation accuracy and system overhead. In practical applications, the BS may determine the RB meshing method according to factors such as the type of service used by the current UT, the quality requirements of the signal, and the like. If the service currently used by the UT does not require high dryness, the number of RB subsets may be selected to be small to save system overhead. If the current service used by the UT requires very high interference accuracy, the RB subset may be selected. The number is large, to accurately reflect the interference status of RB. Specifically, set according to actual needs. When determining the number of RB subsets, the number of RBs included in each RB subset may be determined according to the total number of RBs occupied by the current UT, thereby obtaining the number of RB subsets; and the number of RB subsets may also be determined first. Thus, the number of RBs included in each RB subset is obtained. Assume that the number of all resource blocks occupied by the UT is 100, and the RB meshing method determined according to the need is: Each RB subset contains 20 RBs, and all RBs occupied by the shell d UT can be divided into 5 RB subsets. Or, the RB meshing method determined according to the need is: dividing all the RBs occupied by the UT into 4 RB subsets, and each RB subset contains 25 RBs. Preferably, the BS labels each RB occupied by the UT in the data channel into a plurality of RB subsets, and labels each RB subset, the label is used to uniquely identify a RB subset, preferably, the BS An agreement is made between the UT and the UT, and the plurality of RB subsets are respectively labeled in a predetermined order, and each label corresponds to one RB subset. Step 103: The BS collects the UDP status of each RB subset of the UT, and performs centralized processing on the statistic result of the UDP subset of each RB subset, and obtains all RBs occupied by the UT on the data channel. Dry 4 especially estimated results. Preferably, the BS performs the interference state of each RB subset according to the label of the RB subset. For statistics, you need to determine the statistics of the RB subsets. For example, you can use the following methods: BS statistics The number of unused RBs in each RB subset occupies the number of RBs used in all RB subsets. proportion. According to the ratio value, the dry 4 level of the current RB subset can be set. Certainly, when the BS statistics UT is in the 4th condition of each RB subset, other methods may also be used. For example, the BS statistics the number of used RBs in each RB subset to the number of unused RBs in all RB subsets. proportion. Specifically, it can be set as needed. Preferably, the interference level can be divided into three levels: high interference, medium interference and low interference, which are represented by 2 bits, such as 00 for high interference, 01 for medium interference, and 10 for low interference. Of course, the level of the disturbed condition can also have other settings. Specifically, when the RB subset of the RB subset is set according to the above ratio, the difference is different according to the actual situation. For example, when the ratio is 20%, for a service with very high signal quality requirements, The interference level of the RB subset is: high interference, denoted by 00; for services that do not require high signal quality, the interference level of the RB subset can be: low interference, denoted by 10.

After the BS counts the interference status of each RB subset, the statistical results of the interference status of each RB subset correspond to the respective labels. Then, according to the determined centralized processing mode, the BS is responsible for all the RB subsets. The status statistics are processed centrally. The centralized processing mode may be configured according to requirements. Preferably, the statistical results of the n-numbered consecutive RB subsets may be jointly encoded to obtain a corresponding interference estimation result. The value of n is less than or equal to the number of all RB subsets. The specific coding mode can be used according to the data coding method applicable to the wireless communication system in the prior art, and is not mentioned here. Of course, other centralized processing methods can be set as needed. Finally, the BS will concentrate the processed RB subset's received 4 special conditions, such as the result of the joint estimation obtained by joint coding, and send it to the UT through signaling. In this way, the UT can perform load negotiation between different BSs according to the interference state of the currently occupied RBs, so that the inter-cell interference received by the UT on the currently occupied RBs is effectively reduced to achieve coordination of inter-cell interference. purpose. It should be noted that the above-mentioned centralized processing of the interference status of all RB subsets can effectively reduce the overhead of the system. Assume that the interference levels of RB subset 1 and RB subset 2 are: 01 and 10. If joint coding is not performed, 2 bits are needed to indicate the interference status of the two RB subsets, that is, 4 bits are required. The data is represented by; if, the two RB subsets are jointly coded as follows: First, 01 and 10 are respectively converted into decimal numbers: 1, 2, and then the interference levels of the two RB subsets are The value is jointly converted to a decimal number: N=Xo X 3°+Χι x 3 i=lx 3°+2 x 3 ¹ =7 . Finally, convert the decimal number 7 to a binary number: 111. It can be seen that after joint encoding, the three RB subsets can be represented by 3 bit data. Due to the dry 4 situation, saving lbit. When the number of all RB subsets occupied by the UT is large, excessive coding can be saved by joint coding. Therefore, based on the RB subset of the centralized processing, the BS can effectively reduce the signaling overhead when the obtained interference estimation result is sent to the UT by means of signaling.

The flow of the RS to estimate the RBs occupied by the RSs in the data channel is as shown in FIG. 2. The process includes: Step 201: The RS counts the number of all RBs occupied by the data channel itself.

All RBs occupied by the RS in the data channel include: RBs that have been used by the RS and unused RBs in the data channel allocated by the BS for the RS. The implementation of this step is prior art and will not be discussed here. Step 202: The RS determines the RB meshing method used by the RS to the BS, and divides all RBs occupied by the data channel into multiple RB subsets according to the determined RB meshing method.

The RS determines the implementation of the RB meshing method and the BS determines that the implementation of the RB meshing method is the same, and is not mentioned here. It should be noted that the RB meshing method used by the RS is first determined by the BS and sent to the RS by means of signaling. Then, the RS is based on its own situation, such as the number of all RBs occupied by the RS and the RS has been used. The number of RBs, etc., to determine the RB meshing method that is ultimately used by itself. It is assumed that the meshing method used by the RS for determining the RS is as follows: Each RB subset contains at least 20 RBs, and the RB meshing method is sent to the RS by signaling. The RS determines the RB meshing method that is ultimately used according to the RB meshing method determined by the BS, and combines its own situation, for example, each RB subset contains 15 RBs.

The RS determines the RB meshing method used by the RS and reports it to the BS through signaling, so that the BS controls the RS in the subsequent communication process. Preferably, the RS labels its own RB subset, the implementation of the operation and step 102

The implementation of the labeling of the RB subset of the UT by the BS is the same, and is not mentioned here. Step 203: The RS determines that the RB subset used by the RS is reported to the BS in the statistical manner of the interference status, and collects the interference status of each RB subset. The implementation of the interference status of each RB subset of the RS statistics itself is the same as the implementation of the BS statistic UT of the RB subset proposed in step 103, and is not described here. It should be noted that the RB subset used by the RS is determined by the BS and then sent to the RS. Then, the RS determines the statistical mode of the interference status of the RB subset that is ultimately used by the RS. It is assumed that the RB subset used by the RS determined by the BS is statistically calculated as follows: The ratio of the number of unused RBs in each RB subset to the number of used RBs in all RB subsets is counted. However, according to its own situation, RS finds that this method does not reflect the interference status of the RBs it occupies most accurately. At this time, the RS determines the RB subsets used by itself according to the need to be statistically analyzed. For example: Count the proportion of unused RBs in each RB subset to the total number of RBs.

The RS reports the determined RB subset of its own end to the BS by means of signaling in a statistical manner, so that the BS controls the RS in the subsequent communication process. Step 204: The RS determines the centralized processing manner of the statistics of the received 4 special conditions of all the RB subsets of the RB, and reports the result to the BS, and performs centralized processing on the interference status of all the RB subsets of the RB subset. The dry 4 of all RBs occupied on the data channel is especially estimated.

The implementation of the centralized processing of the RS 4 utmost conditions of all RB subsets of the RS is the same as the implementation of the centralized processing of the BD subset of all RB subsets of the UT proposed by the step 103, which is no longer here. Narration. It should be noted that the manner in which the RS uses the centralized processing of the interference status statistics of all the RB subsets of the RS is first determined by the BS and sent to the RS. Then, the RS determines the final use for itself according to its own needs. The way in which the RB subset is subjected to centralized processing by the dry 4 situation. It is assumed that the statistical results of the interference state statistics of all RB subsets used by the RS determined by the BS are collectively processed as follows: Joint coding of two consecutive RB subsets is performed. According to the centralized processing mode, the RS finally determines the method according to its own needs: Joint coding of three consecutive RB subsets.

The RS reports the determined centralized processing manner to the BS, so that the BS controls the RS in the subsequent communication process. Finally, the RS will report the interference of the RB subset of the RB to the BS. The interference estimation result obtained by the joint coding is reported to the BS by means of signaling. In this way, the BS can coordinate the inter-cell interference by controlling the RS, which is a prior art and is not mentioned. According to an embodiment of the present invention, there is also provided a computer readable medium having stored thereon computer executable instructions for causing a computer or processor to perform, for example, when executed by a computer or processor The processing of the steps shown in Figs. 1 and 2 can implement the above-described method embodiments. In order to implement the foregoing RB interference estimation method, an embodiment of the present invention further provides an RB interference estimation apparatus, which is applicable to both a BS and an RS. As shown in FIG. 3, the apparatus includes: a subset division module 10, The subset interference statistic module 20 and the centralized processing module 30, wherein the subset partitioning module 10 is configured to divide all the RBs that are counted into multiple RB subsets according to the determined RB meshing manner; The 4th statistic module 20 is configured to perform statistics on the interference status of each RB subset according to the determined RB subsets, and obtain the statistical results of the interference status of each RB subset; The module 30 is configured to perform centralized processing on the statistics of all the RB subsets according to the determined centralized processing manner, and obtain the statistics of all the RBs. The subset dividing module 10 is further configured to label each of the divided RB subsets separately, and the label is used to uniquely identify one RB subset. The apparatus of the present invention may further include: a statistical result sending module 40, configured to send the interference estimation result of all RBs to the UT, or to the BS. When the device is used in the BS, the result of the estimation of all the RBs is sent to the UT; when the device is used in the RS, the interference estimation result of all the RBs is given to 88. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Where in the invention Within the principles, any modifications, equivalent substitutions, improvements, etc., are intended to be included within the scope of the present invention.

Claims

Claim

A resource block interference estimation method, characterized in that the method comprises:

The control terminal divides all the calculated resource blocks into a plurality of resource block subsets according to the determined resource block gridding manner;

The control terminal performs statistics on the interference status of each resource block subset according to the determined statistical method of the interference status of the resource block subset, and obtains the statistical result of the interfered dog condition of each resource block subset;

The control terminal performs centralized processing on the statistics of all the resource block subsets according to the determined centralized processing manner, and obtains the statistics of all the resource blocks.

The resource block interference estimation method according to claim 1, wherein, when the control terminal is a base station, all the resource blocks that are counted are: the user terminal that is counted by the base station occupies in a data channel. All resource blocks;

When the control terminal is a relay station, all the resource blocks that are counted are: all resource blocks occupied by the relay station and occupied by the data channel.

The resource block interference estimation method according to claim 1, wherein the method further comprises: the control terminal separately labeling each resource block subset, wherein the label is used to uniquely identify an RB subset. .

The resource block interference estimation method according to claim 1, wherein, when the control terminal is a base station, the method further includes: the base station transmitting an interference estimation result of the all resource blocks to the user Terminal

When the control terminal is a relay station, the method further includes: the relay station uplinking the interference estimation result of the all resource blocks to the base station.

The resource block interference estimation method according to any one of claims 1 to 4, wherein, when the control terminal is a base station, the resource block meshing mode, the resource block subset is subjected to a dry 4, the statistic mode and the centralized processing mode are determined by the base station; When the control terminal is a relay station, the resource block meshing mode, the resource block subset is subjected to the statistic mode, and the centralized processing mode is determined by the base station, and is sent to the relay station.

The resource block interference estimation method according to claim 5, wherein, when the control terminal is a relay station, the method further includes: the relay station according to the resource block gridding mode delivered by the base station, The resource block subset is subjected to the statistics mode and the centralized processing mode, and the resource block meshing mode used by the resource block, the statistical mode of the resource block subset interference state, and the centralized mode are determined. The processing mode is applied to the base station.

A resource block interference estimating apparatus, characterized in that the apparatus comprises:

a subset partitioning module, configured to divide all the resource blocks that are counted into a plurality of resource block subsets according to the determined resource block meshing manner; and a subset interference statistical module, configured to determine the resource block subset According to the statistical method of the interference state, the interference state of each resource block subset is counted, and the statistical result of the received and ί ̄ situation of each resource block subset is obtained;

The centralized processing module is used for centralized processing according to the determined centralized processing method, and the centralized statistical processing results of all resource block subsets are obtained, and the statistical results of all the resource blocks are obtained.

The resource block interference estimating apparatus according to claim 7, wherein the subset dividing module is further configured to respectively label each of the divided resource block subsets, wherein the label is used to uniquely identify one RB subset.

The resource block interference estimating apparatus according to claim 7 or 8, wherein the apparatus further comprises: a statistical result sending module, configured to send the interference estimation result of all resource blocks to the user terminal, or report the same To the base station.