WO2011127787A1

WO2011127787A1 - Method and system for detecting uplink interference source

Info

Publication number: WO2011127787A1
Application number: PCT/CN2011/072258
Authority: WO
Inventors: 任龙涛; 韩立锋; 王昇明
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-12
Filing date: 2011-03-29
Publication date: 2011-10-20
Also published as: CN102215505B; CN102215505A

Abstract

A method for detecting an uplink interference source is disclosed in the present invention, and the method mainly includes the following steps: a serving base station configures interference parameters and a interference triggering event for a terminal; after detecting power parameters of a neighboring base station, the terminal determines whether the terminal itself causes an uplink interference to the neighboring base station according to the configured interference parameters and the interference triggering event, when the terminal determines the terminal itself is an uplink interference, the terminal reports an interference measurement report to the serving base station, and the serving base station transmits the interference measurement report and interference control information to the neighboring base station, which enables the neighboring base station to learn the uplink interference source of the neighboring base station. A system for detecting an uplink interference source is also disclosed in the present invention. The present invention provides a solution for detecting the uplink interference source, and provides a foundation for an effective and fast interference control processing.

Description

Method and system for detecting uplink interference source

The present invention relates to the field of wireless cellular communications, and in particular, to a method and system for detecting an uplink interference source. Background technique

Interference control is an important issue in wireless communication systems. Inter-cell interference will be more prominent in the case of co-frequency deployment of cells. The typical method of inter-cell interference with inter-cell interference in the case of inter-frequency interference is to use frequency reuse technology. For macro base stations, interference can be solved through common methods. The method and rational planning to minimize the elimination of interference.

With the development of wireless technology, a home base station (H(e)NB, Home (e)NodeB) is introduced in the wireless communication system. H(e)NB is a small, low-power base station deployed in homes and offices. Indoor spaces are mainly used to provide users with higher service rates and lower the cost of using high-rate services, while at the same time making up for the shortage of existing distributed cellular wireless communication systems. The advantages of H(e)NB are affordable, convenient, low power output, plug and play, and more. The H(e)NB user is connected to the core network through the home base station access network (H(e)NB AN, Home (e)NodeB Access Network), and the H(e)NB AN is composed of H(e)NB and the home base station gateway ( H(e)NB GW, Home (e)NodeB Gateway), wherein the main functions performed by the H(e)NB GW are: verifying the security of the H(e)NB, and processing the registration and connection of the H(e)NB Into the control, responsible for data exchange between the core network and H(e)NB.

Since the number of H(e)NBs is large, it cannot be completely separated from the macro base station and other neighboring H(e)NBs, and the H(e)NB is often under the coverage of the macro base station. Therefore, H (e) The introduction of NB has increased the complexity of wireless networks, making the interference situation more prominent. Here Youhe down interference. In the case of uplink interference, since the base station considers the UE under the serving cell, other received signals are considered to be interference, and the uplink transmission signals of other cells are also included. As shown in Figure 1, the uplink interference may include the following cases: interference from a home base station (HUE, Home User Equipment) to a macro base station, and a macro terminal (MUE, Macro UE) under a macro base station. The interference of the home base station may further include interference of the HUE under the home base station to other home base stations, interference of the MUE under the macro base station with other macro base stations, and the like.

The current method of solving interference is basically power adjustment or division of frequency resources, but firstly, the interference source needs to be determined, and power control or frequency division can be performed for the interference source. Currently, in the detection of interference sources for uplink interference, the home base station or the macro base station can only determine which macro base station or home base station from which the interference originates, but cannot determine the terminal that caused the interference. Summary of the invention

In view of this, the main object of the present invention is to provide a method for detecting an uplink interference source and to achieve the above object, the technical solution of the present invention is implemented as follows:

The present invention provides a method for detecting an uplink interference source, the method comprising: the serving base station configuring an interference parameter and an interference triggering event for the subordinate terminal; the terminal detecting the power parameter of the neighboring base station in real time; Determining whether the interference triggering event is met, and determining whether the interference triggering event is met, and determining the interference measurement report to the serving base station, otherwise, The interference measurement report is not reported.

In the foregoing solution, the interference parameter configured by the serving base station for the subordinate terminal and the interference triggering event are one or more of the following combinations: the interference parameter includes a downlink power threshold of the neighboring base station and a terminal transmit power threshold. The interference triggering event includes: the downlink power of the neighboring base station received by the terminal is greater than the downlink power threshold of the neighboring base station, and the transmitting power of the terminal itself is greater than the terminal The interference power parameter includes: an interference signal power threshold of the terminal to the neighboring base station, where the interference triggering event includes: the interference signal power of the terminal to the neighboring base station is greater than the interference signal power threshold of the terminal to the neighboring base station; The interference parameter includes the total interference signal power of the neighboring base station and the interference ratio threshold of the terminal to the neighboring base station, and the interference triggering event includes: the interference ratio of the terminal to the neighboring base station is greater than the interference ratio of the terminal to the neighboring base station.

In the above solution, before the serving base station configures the interference parameter and the interference triggering event for the terminal, the method further includes: determining, by the serving base station, the interference parameter and the interference triggering event by negotiating with the neighboring base station.

In the above solution, the serving base station configures an interference parameter and an interference triggering event for the terminal, where: the serving base station configures interference parameters and interference for the terminal by using a configuration message in the RRC protocol or by using a public broadcast message. trigger event.

In the foregoing solution, the terminal detects the power parameter of the neighboring base station, where: the terminal receives the message broadcast by the neighboring base station, and detects, from the message, the power parameter that includes the downlink power of the base station and/or the transmit power of the neighbor base station. .

In the above solution, after the terminal reports the interference measurement report to the serving base station, the method further includes: the serving base station sending an interference control message including the interference measurement report to the neighbor base station, to notify the The neighbor base station causes the terminal to cause interference to the neighbor base station.

In the foregoing solution, the interference measurement report includes any one or more of the following parameters: a physical identifier or a cell name of a cell covered by the neighbor base station, and a downlink power of the neighbor base station, a transmission power of the terminal itself, The transmit power of the neighbor base station and the path loss of the terminal to the neighbor base station.

The present invention further provides a system for detecting an uplink interference source, the system comprising: a serving base station and a terminal, where the serving base station is configured to configure an interference parameter and an interference triggering event for the terminal; The method is configured to detect a power parameter of a neighboring base station in real time, and according to the detected power parameter of the neighboring base station, the interference parameter configured by the serving base station, and the Determining whether the interference triggering event configured by the serving base station is met, and if yes, determining that it is an interference source, reporting an interference measurement report to the serving base station, otherwise, not reporting the interference measurement report to the serving base station .

In the above solution, the serving base station is further configured to determine the interference parameter and the interference triggering event by negotiating with the neighboring base station.

In the above solution, the serving base station is further configured to: after receiving the interference measurement report reported by the terminal, send an interference control message including the interference measurement report to the neighbor base station.

The method and system for detecting an uplink interference source provided by the present invention, the interference parameter and the interference trigger event are configured by the serving base station, and after detecting the power parameter of the neighbor base station, the terminal according to the configured interference parameter and the interference trigger event It is determined whether the uplink interference is caused by the neighboring base station, and the interference measurement report is reported to the serving base station, so that the serving base station and the neighbor base station can learn the interference source of the uplink interference. The invention provides a solution for detecting the uplink interference source, and lays a foundation for the effective and rapid implementation of the interference control process. DRAWINGS

1 is a schematic diagram of an interference scenario between a home base station and a macro base station;

2 is a schematic diagram of an implementation process of a method for detecting an uplink interference source according to the present invention;

3 is a schematic structural diagram of a system for detecting an uplink interference source according to the present invention;

4 is an interaction diagram of performing uplink interference source detection by using a downlink power threshold of a neighboring base station and a transmission power threshold of the terminal;

FIG. 5 is a schematic diagram of interaction of performing uplink interference source detection by using an interference signal power threshold of a terminal to a neighboring base station;

FIG. 6 is a schematic diagram of interaction between the completion of the uplink interference source detection process by the interference ratio. detailed description

The basic idea of the present invention is: the serving base station configures the subordinate terminal with an interference parameter for determining whether interference is generated, and an interference triggering event. After detecting the power parameter of the neighboring base station, the terminal determines whether the content is satisfied according to the configured interference parameter. The configured interference triggering event, if yes, the terminal determines that it is the interference source, and reports the measurement report to the serving base station. After receiving the measurement report reported by the terminal, the serving base station may determine that the terminal generates uplink interference to the neighboring base station. Otherwise, The terminal does not report the measurement report to the serving base station, and the terminal does not generate uplink interference to the neighbor base station.

A method for detecting an uplink interference source according to the present invention, as shown in FIG. 2, mainly includes the following steps:

Step 201: The serving base station configures an interference parameter and an interference triggering event for the subordinate terminal. Step 202: The terminal detects the power parameter of the neighboring base station in real time;

Step 203-204: The terminal determines whether the interference triggering event is met according to the detected power parameter of the neighboring base station, its own transmit power, and the configured interference parameter. If yes, proceed to step 204 to determine that it is The interference source is reported, and the interference measurement report is reported to the serving base station, and the current detection process is ended. Otherwise, the interference measurement report is not reported, and the current detection process is directly ended.

The interference measurement report specifically refers to a related measurement report that is measured when the terminal detects that it is an interference source, and may include wireless environment signal information, a cell identifier that is interfered, frequency information, and the like.

Here, the interference measurement report belongs to a dedicated message, and may include an identifier of the terminal. If the serving base station has learned the identifier of the terminal, the interference measurement report may not include the terminal identifier. In addition, the cell identifier is specifically interfered by the terminal. The identity of the cell covered by the neighboring base station.

After the terminal reports the interference measurement report to the serving base station, the method may further include: the serving base station sending the interference including the interference measurement report to the neighbor base station And controlling a message to notify the neighboring base station that the terminal causes interference to the neighboring base station.

The method may further include: determining, by the serving base station, the interference parameter and the interference triggering event by negotiating with the neighboring base station, in the step 201, before the serving base station configures the interference parameter and the interference triggering event for the terminal. .

In order to implement the above method, the present invention further provides a system for detecting an uplink interference source. Referring to FIG. 3, the system includes: a serving base station 31 and a terminal 32, where: the serving base station 31 is configured to The terminal configures an interference parameter and an interference triggering event; the terminal 32 is configured to detect a power parameter of the neighboring base station in real time, and according to the detected power parameter of the neighboring base station, the interference parameter configured by the serving base station 31, and the transmission of the terminal Determining whether the interference triggering event configured by the serving base station 31 is reached, and if yes, determining that it is an interference source, reporting the interference measurement report to the serving base station 31, otherwise, not reporting the interference measurement report to the service Base station 31.

The serving base station 31 may be further configured to: determine the interference parameter and the interference trigger event by negotiating with the neighbor base station.

The serving base station 31 may be further configured to: after receiving the interference measurement report reported by the terminal 32, send an interference control message including the interference measurement report to the neighbor base station, so that the neighbor base station can learn The source of its own interference is the terminal 32 for subsequent interference control processing.

In a practical application, the serving base station 31 may be a home base station or a macro base station, and the neighbor base station may also be a home base station or a macro base station. The terminal may be a mobile device, such as a mobile phone, within a cell covered by the home base station or the macro base station.

The specific implementation of the detection process of the uplink interference source by applying the present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1

The uplink power threshold of the neighbor base station and the transmit power threshold of the terminal are used to complete the uplink. The detection process of the interference source is shown in Figure 4. The specific process is as follows:

Step 401: The serving base station of the local cell and the neighboring base station of the neighboring cell determine the interference parameter and the interference trigger event through negotiation.

The determined interference parameter includes a base station downlink power threshold Th1 and a terminal transmit power threshold Th2, and the determined interference trigger event is: the downlink power of the neighbor base station received by the terminal is greater than Thl and the terminal's own transmit power is greater than In the case of Th2, the terminal interferes with the neighboring base station, and the interference measurement report needs to be reported. Otherwise, the terminal does not cause interference to the neighboring base station, and does not need to report the interference measurement report.

Here, the determination of Thl and Th2 can be implemented by the monthly service base station and the neighbor base station through the X2 port or SI port ground side flow interaction. The specific values of Thl and Th2 are calculated by the neighbor base station according to its own transmit power and the transmit power of each terminal within its coverage range.

Step 402: The serving base station configures the determined interference parameter and the interference trigger event to the terminal in the local cell by using a configuration message in the RRC (Radio Resource Control) protocol, such as an RRC connection reconfiguration (RRC Connection Reconfiguration) message.

Step 403: The terminal receives the message broadcast by the neighboring base station in real time, and detects the neighbor base station power parameter from the message, where the power parameter of the neighbor base station includes the downlink power of the neighbor base station.

Rx Power, and also obtains a physical identifier or a cell name of a cell covered by the neighbor base station that may be interfered by the terminal from the message broadcast by the neighbor base station;

Step 404: The terminal determines, according to the interference parameter configured by the serving base station, and the interference trigger event, whether the detected downlink power Rx_Power of the neighbor base station and the transmission power Tx_Power of the terminal itself satisfy the formula (1), if If yes, proceed to step 405; otherwise, end the current process;

Rx_Power>Thl , Tx_Power>Th2 ( 1 ) Step 405: The terminal determines that it has generated interference to the neighbor base station, and determines that it is the interference source, and reports the interference measurement report to the serving base station; The interference measurement report may include any one or more of the following parameters, in addition to the physical identifier or the cell name of the cell covered by the neighboring base station: the downlink power of the neighbor base station, Rx, Power, and the terminal itself. Transmit power Tx-Power, etc.

Here, the terminal may carry the interference measurement report to the serving base station by using any existing signaling in the RRC protocol, or the terminal may define a new signaling for transmitting the interference measurement report in the RRC protocol by negotiating with the serving base station, according to The RRC protocol sends the signaling to the serving base station.

Step 406: The serving base station receives the interference measurement report reported by the terminal, determines that the terminal is an interference source of the neighbor base station, and sends an interference control message to the neighbor base station. The interference control message includes the interference measurement report.

After that, the neighbor base station and the serving base station negotiate to complete the subsequent interference control process. Embodiment 2

The detection process of the uplink interference source is completed by the interference signal power threshold of the terminal to the neighboring base station. Referring to FIG. 5, the specific process is as follows:

Step 501: The same as step 401, the difference is that the interference parameter determined here is the interference signal power threshold Th of the terminal to the neighbor base station, and the interference trigger event is when the interference signal power of the terminal to the neighbor base station is greater than Th, then the terminal If the neighboring base station is in interference, the interference measurement report needs to be reported. Otherwise, the terminal does not cause interference to the neighboring base station, and does not need to report the interference measurement report.

Here, the interference signal power of the terminal to the neighbor base station is the power of the interference signal received from the terminal base station and received from the terminal.

Step 502: The serving base station configures the determined interference parameter Th and the interference trigger event to the terminal by using a configuration message in the RRC protocol, such as an RRC Connection Reconfiguration message or a public broadcast message, such as SIB1 (System Information Block Typel).

Step 503: The terminal receives the message broadcast by the neighboring base station in real time, and detects the neighbor base station power parameter from the message, where the power parameter of the neighbor base station includes the downlink power of the neighbor base station. Rx-Power and the transmit power Tx_N of the neighbor base station, and also obtain the physical identifier or cell name of the cell covered by the neighbor base station that may be interfered by the terminal from the message broadcast by the neighbor base station; wherein, the neighbor base station and the service may also be In the process of determining the interference parameter by the base station, the neighbor base station transmits its own transmit power Tx_N to the serving base station, and then the serving base station sends the transmit power Tx_N of the neighbor base station to the serving base station in the process of configuring the interference parameter for the terminal. The terminal.

Step 504: The terminal according to the configured interference parameter Th and the interference trigger event, the detected downlink power Rx_Power of the neighbor base station, the transmit power Tx_N of the neighbor base station, and the transmit power Tx_Power of the neighbor base according to the formula (2) Obtaining the interference signal power Delta of the terminal to the neighboring base station, and determining whether the obtained Delta is greater than the configured Th. If yes, proceeding to step 505, otherwise ending the current process;

Delta=Tx_Power-(Tx_N-Rx_Power) (2) Step 505: Same as step 405, except that the interference measurement report reported by the terminal may include the physical identifier or cell of the cell covered by the neighbor base station. In addition to the name, any one or more of the following parameters may be included: downlink power Rx Power of the neighbor base station, transmission power Tx of the terminal itself, power of the neighbor base station Tx_N, path loss of the terminal to the neighbor base station, neighbor The physical identity of the base station, etc.

The path loss from the terminal to the neighbor base station is the difference between the terminal's own transmit power Tx_Power and the interference signal power Delta of the terminal to the neighbor base station, which is calculated by the terminal.

Step 506: It is identical to step 406.

Embodiment 3

The detection process of the uplink interference source is completed by the interference ratio, as shown in FIG. 6, the specific process is as follows:

Step 601: The same as step 401, the difference is that the interference parameter here includes: the total interference signal power No of the neighbor base station, and the interference ratio threshold Pth of the terminal to the neighbor base station; If the interference triggering event is that the interference ratio of the terminal to the neighboring base station is greater than the Pth, the terminal may cause interference to the neighboring base station, and the interference measurement report needs to be reported. Otherwise, the terminal does not cause interference to the neighboring base station, and the interference measurement report does not need to be reported;

The No is the sum of all the interference signal powers received by the neighboring base station in addition to the signals sent by the subordinate terminals, and includes the power of the uplink interference signal sent by the terminal to the neighboring base station, and the neighbor base station can directly notify the serving base station. Pth is the ratio of the interference signal power of the terminal to the neighboring base station to the sum of the powers of all the interference signals received by the neighboring base station.

Step 602: The serving base station configures the determined interference parameter Th and the interference trigger event by using a configuration message in the RRC protocol, such as an RRC Connection Reconfiguration message or a public broadcast message, such as SIB1.

Step 603: The terminal receives the message broadcast by the neighboring base station in real time, and detects the neighbor base station power parameter from the message, where the power parameter of the neighbor base station includes the downlink power of the neighbor base station.

Rx-Power and the transmit power Tx_N of the neighbor base station, and also obtain the physical identifier or cell name of the cell covered by the neighbor base station that the terminal may interfere with from the message broadcast by the neighbor base station; Step 604: The terminal according to the configured interference The parameter, and the interference triggering event, the downlink power Rx_Power of the detected neighboring base station, the transmitting power Tx_N of the neighboring base station, and the transmission power Tx_Power of the neighboring base station, and the terminal to the neighbor base station according to the formula (2) The interference signal power Delta, and then the obtained Delta obtains the interference ratio Pth_U from the terminal to the neighbor base station according to the equation (3), and determines whether the obtained Pth_U is greater than Pth, and if yes, proceeds to step 605, otherwise, End the current process;

Pth_U=Delta/No (3) Step 605: The same as step 505;

Step 606: It is identical to step 506.

It should be noted that, in an actual application, any one or more of the combination of the interference parameter and the interference trigger event mentioned in the foregoing three embodiments may be configured in the terminal according to requirements, so that The detection process of the uplink interference source is easier to implement.

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 detecting an uplink interference source, the method comprising: the serving base station configuring an interference parameter and an interference trigger event for a subordinate terminal;

The terminal detects a power parameter of the neighbor base station in real time;

Determining, by the terminal, whether the interference triggering event is met according to the detected power parameter of the neighboring base station, the configured interference parameter, and the transmission power of the neighboring base station, and if yes, determining that the interference source is the interference source, and reporting the interference measurement report to the The serving base station is not reported, otherwise the interference measurement report is not reported.

The method for detecting an uplink interference source according to claim 1, wherein the interference parameter configured by the serving base station for the subordinate terminal and the interference trigger event are one or more of the following combinations:

The interference parameter includes a neighboring base station downlink power threshold and a terminal transmit power threshold. The interference triggering event includes: the downlink power of the neighbor base station received by the terminal is greater than the downlink power threshold of the neighbor base station, and the terminal's own transmit power is greater than the terminal transmit power. Wide value

The interference parameter includes an interference signal power threshold of the terminal to the neighboring base station, and the interference triggering event includes: the interference signal power of the terminal to the neighboring base station is greater than the interference signal power threshold of the terminal to the neighboring base station;

The interference parameter includes a total interference signal power of the neighboring base station and a interference ratio threshold of the terminal to the neighboring base station, and the interference triggering event includes: the interference ratio of the terminal to the neighboring base station is greater than the interference ratio of the terminal to the neighboring base station.

The method for detecting an uplink interference source according to claim 1, wherein before the serving base station configures an interference parameter and an interference triggering event for the terminal, the method further includes:

The serving base station determines the interference parameter and the interference triggering event by negotiating with the neighbor base station.

The method for detecting an uplink interference source according to any one of claims 1 to 3, wherein the serving base station configures an interference parameter and an interference triggering event for the terminal, where: the serving base station passes the radio resource control protocol. The configuration message in the configuration or the interference parameter is configured for the terminal through the public broadcast message, and the interference trigger event.

The method for detecting an uplink interference source according to any one of claims 1 to 3, wherein the terminal detects a power parameter of the neighboring base station, where:

The terminal receives the message broadcast by the neighbor base station, and detects a power parameter including the downlink power of the neighbor base station and/or the transmission power of the neighbor base station from the message.

The method for detecting an uplink interference source according to any one of claims 1 to 3, wherein after the terminal reports an interference measurement report to the serving base station, the method further includes: the serving base station The neighboring base station sends an interference control message including the interference measurement report to notify the neighbor base station that the terminal causes interference to the neighbor base station.

The method for detecting an uplink interference source according to claim 6, wherein the interference measurement report includes any one or more of the following parameters: a physical identifier or a cell of a cell covered by the neighbor base station interfered by the terminal The name, and the downlink power of the neighbor base station, the transmit power of the terminal itself, the transmit power of the neighbor base station, and the path loss of the terminal to the neighbor base station.

A system for detecting an uplink interference source, the system comprising: a service base station and a terminal, wherein

The serving base station is configured to configure an interference parameter and an interference triggering event for the terminal; the terminal is configured to detect a power parameter of the neighboring base station in real time, and according to the detected power parameter of the neighboring base station, the serving base station configuration The interference parameter, and the transmission power of the self, determine whether the interference triggering event configured by the serving base station is met, and if yes, determine that it is the interference source, report the interference measurement report to the serving base station, otherwise, the interference is not reported. The measurement report is sent to the serving base station.

9. The system for detecting an uplink interference source according to claim 8, wherein: The serving base station is further configured to determine the interference parameter and the interference triggering event by negotiating with the neighboring base station.

The system for detecting an uplink interference source according to claim 8 or 9, wherein the serving base station is further configured to: after receiving the interference measurement report reported by the terminal, send the The interference control message of the interference measurement report.