WO2009089650A1

WO2009089650A1 - A method and apparatus for reporting a measurement report

Info

Publication number: WO2009089650A1
Application number: PCT/CN2008/000102
Authority: WO
Inventors: Chunguo Zhang; Zhongda Du
Original assignee: Zte Corporation
Priority date: 2008-01-15
Filing date: 2008-01-15
Publication date: 2009-07-23

Abstract

A method and apparatus for reporting a measurement report are provided, the method includes that: a terminal regards the serving cell as the best cell response to a measurement control message from the network side, the measurement control message contains the measurement control parameter and a trigger condition for reporting the best cell, wherein, the trigger condition is that: the best cell is changed; the terminal measures the radio quality of the serving cell and at least one adjacent cell according to the measurement control parameter containing in the measurement control message; when the trigger condition is satisfied, the terminal reports the measuring report of the best cell, and the measuring report contains the cell identification of the best cell and the cell identification of another or more adjacent cell entering the report range. The apparatus includes a receiving module, setup module, measuring module, and reporting module. Through the present invention, the network side can accurately know the current cell that has the best radio quality, therefore it can improve the accuracy of measurement data maintenance on the network side, and effectively support the switch within frequency or between frequency.

Description

The present invention relates to a measurement event evaluation method in the field of wireless communication technologies, and in particular to a measurement report reporting method and apparatus, which are particularly suitable for an LTE (Long Term Evolution) system. . BACKGROUND In LTE (Long Term Evolution), in order to support handover, intra-frequency, inter-frequency, and inter-system measurements are used to determine signal coverage and radio quality of a serving cell and a target neighbor. Currently, for intra-frequency inter-frequency measurements, use the following Equation 1 to evaluate the measurement: Neighbour Quality(n) + offset > Serving-Quality (Formula 1) where: neighbour—Quality (n) indicates the wireless of a neighboring cell Shield, serving—Quality indicates the wireless shield of the serving cell; offset indicates the additional offset on the neighboring cell, which can take a positive or negative value. Equation 1 indicates that when the radio quality of the neighboring cell and the radio quality of the serving cell are offset, the terminal reports the measurement event. The measurement report will include neighboring cells that meet the conditions of Equation 1. This event is often referred to as "into the escalation scope event." Generally, the application scenario of entering the report scope event is related to the setting of the offset value. If the value is set to be small, for example, a value less than 0, then the object that normally enters the report range is a switchable object, because only when The event is triggered when the radio quality of the neighboring cell is higher than that of the serving cell; if the value is set to be larger, for example, a value greater than 0, the cell entering the reporting range includes a switchable candidate cell, which may have The radio quality is higher than the neighboring cell of the serving cell, that is, the neighboring cell suitable for handover. In the LTE system, in the handover preparation phase, the source cell transmits a handover request to the handover candidate cell in addition to the handover request to the target cell. These handover candidate cells only retain certain communication context information, so that once the handover fails, the terminal can reselect these candidate cells and quickly resume the wireless connection. These handover candidate cells can be triggered by the above "entry reporting range event". However, after the "into the reporting scope event" is triggered, the network does not necessarily trigger the handover immediately. For example, the terminal reports the neighboring cell with better radio quality. However, if the source cell considers that the target cell is overloaded, it will delay or even give up. The handover process of the target cell; or the radio quality of the neighboring cell entering the reporting range cannot meet the requirements of the handover decision, and the like. If the above situation occurs, because there is no definition of "leave report scope event", the network may require the terminal to periodically report these measurements after the event is triggered in order to know in real time which neighboring cells are still reporting. Until no neighboring cells are within the reporting range. If the network immediately performs the handover process when the "Enter Reporting Range Event" is triggered, the terminal will always be switched to the appropriate target cell; but if the network does not switch immediately, then in general, the network will have two options at this time. In the first method, the network triggers the handover in the process of periodically reporting the terminal periodically. For mode one, when setting the measurement reporting period, the network must choose between the handover delay and the possible signaling of the reported report. For method two, the switching delay is not limited by the length of the measurement report, but there is an abnormal situation. This is because the neighboring cell that is considered to have the best wireless quality when the event is triggered will change before the next measurement report is triggered. The occurrence of an abnormality depends on the change of the neighboring cell. For example, if the neighboring cell is still in the reporting range, but is not the best neighboring cell, the terminal will switch to the cell with the best serving shield, which may cause the terminal to switch multiple times to switch to the best cell. For another example, if the neighboring cell even leaves the reporting range, the terminal may switch to a neighboring cell with poor quality of service, resulting in various communication problems. The network existing in the handover process cannot know the change of the best neighboring cell, which may result in the problem that the best cell cannot be correctly switched. The solution adopted in the currently used handover technology is not given. SUMMARY OF THE INVENTION The present invention has been made in view of the problem that a network cannot know the change of the best neighboring cell in the handover process existing in the related art, thereby possibly causing a problem that the cell cannot be correctly switched to the optimal cell, and the present invention aims to provide a Method and device for reporting measurement reports. According to an aspect of the present invention, a method for reporting a measurement report is provided, the method being applied to a terminal including a terminal, a serving cell where the terminal is located, and at least one neighboring cell adjacent to or adjacent to the serving cell. Network environment. The measurement report reporting method according to the embodiment of the present invention includes the following steps: in response to the measurement control message from the network side, the terminal uses the serving cell as the best cell, and the measurement control message carries the measurement control parameter and the best cell reporting trigger condition. The triggering condition is: the best cell changes; the terminal measures the wireless shield of the serving cell and the at least one neighboring cell according to the measurement control parameter carried in the measurement control message; and when the trigger condition is met, the terminal 4 And the best cell measurement, and carrying the cell identifier of the current best cell and the cell identity of the other one or more neighboring cells entering the reporting range, where the current best cell is the radio quality The best neighborhood. The network side pre-specifies the number of cell identifiers carried in the best cell measurement report in the measurement control message. Preferably, when the terminal measures the radio quality of the serving cell and the at least one neighboring cell, the terminal compares the currently measured radio quality of the best cell with the measured wireless shield of other cells in real time, and determines whether the trigger is satisfied according to the comparison result. Condition; wherein, in the case where there is a cell whose radio quality is better than the radio quality of the current best cell, it is judged that the trigger condition is satisfied. Wherein, when the trigger condition is met, the terminal uses the cell with the best radio quality as the best cell. In addition, when the terminal receives the measurement control message of the network side in the process of measuring the radio quality of the monthly cell and the at least one neighboring cell, the measurement report reporting method according to the embodiment of the present invention further includes the following processing: The monthly cell is regarded as the best cell; whether the trigger condition is satisfied currently; if the trigger condition is met, the terminal reports the best cell measurement report; if the trigger condition is not met, the terminal continues to the serving cell and the at least one neighbor The radio quality of the cell is measured. Further, the terminal stops the measurement of the wireless quality in response to the measurement stop message from the network side. The foregoing neighboring cell that enters the reporting range is a neighboring cell whose difference between the radio quality and the radio quality of the serving cell is less than a predetermined offset. Preferably, the best, area measurement report further carries the measurement result of the 'J, zone corresponding to the carried cell identifier. Preferably, before the top 4 measurement of the best cell, the terminal sorts the other one or more neighboring cells that enter the reporting range, and carries the corresponding cell identifier in the best cell measurement report according to the order of the ranking. According to another aspect of the present invention, a measurement report reporting device is provided, the device being located on the terminal side. The measurement report reporting device according to the embodiment of the present invention includes: a receiving module, configured to receive a measurement control message from a network side, where the measurement control message carries a measurement control parameter and a best cell reporting trigger condition, where the trigger condition is The best cell is changed; the setting module is configured to set the best cell; the measuring module is configured to measure the radio quality of the serving cell and the at least one neighboring cell according to the measurement control parameter carried in the measurement control message; The best cell measurement report is reported in the case that the measurement result of the measurement module meets the trigger condition, where the best cell measurement report carries the cell identifier of the current best cell and one or more other areas that enter the reporting range. The cell identity of the neighboring cells. When the receiving module receives the measurement control message, the setting module uses the serving cell where the terminal is located as the best cell, and if the measurement result of the measurement module shows that the best cell changes, the current cell with the best radio quality is used as the cell. The best cell. The neighboring cell that enters the reporting range is a neighboring cell whose difference between the wireless shield and the radio quality of the serving cell is less than a predetermined offset; and preferably, for the number of cell identifiers carried in the best cell measurement report, Predetermined by the network side in the measurement control message. The above-mentioned at least one technical solution provided by the present invention can enable the network side to accurately know which cell (best cell) with the best radio quality is currently, by causing the terminal to report the network side in time when the best cell changes. Improve the accuracy of network side measurement data maintenance, and effectively support intra-frequency inter-frequency handover. Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the <RTI 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. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for reporting a measurement report according to an embodiment of the method of the present invention; FIG. 2 is a schematic diagram of an example 1 of a method for reporting a measurement report according to an embodiment of the method of the present invention; FIG. 4 is a schematic diagram of an example 3 of a measurement report reporting method according to an embodiment of the method of the present invention; FIG. 5 is a measurement report reporting according to an embodiment of the apparatus of the present invention. A block diagram of the device. DETAILED DESCRIPTION OF THE INVENTION Since the LTE system only supports hard handover, and network planning always requires a high handover success rate of the network, for the source cell, the most valuable measurement result for the neighboring cell is the best wireless quality. Information about neighboring cells. As described above, after the terminal triggers the entry of the reporting range event, if the best neighboring cell changes, and the network cannot know about it, it may cause incorrect switching; therefore, if it is still within the reporting range When the best neighboring cell changes, the corresponding event can also be triggered, and the neighboring cell that is still in the reporting range is reported, and the above switching problem can be solved. In view of this, an embodiment of the present invention provides a method and an apparatus for reporting a measurement report. The preferred embodiments of the present invention are described with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and explain the invention. Method Embodiments According to an embodiment of the present invention, a measurement report reporting method is first provided, and the method is applied to a network environment including a terminal, a serving cell where the terminal is located, and at least one neighboring cell adjacent to or adjacent to the serving cell. As shown in FIG. 1, in general, the method includes the following processing (step S102 - step S104): Step S102: In response to the measurement control message from the network side, the terminal uses the serving cell as the best cell, and the measurement control message can be carried. There are measurement control parameters and optimal cell reporting triggering conditions, where the triggering condition may be: The best cell changes; Step S104: The terminal measures the radio quality of the serving cell and the at least one neighboring cell according to the measurement control parameter carried in the measurement control message. If the trigger condition is met, the terminal uses the cell with the best radio quality as the best cell. And performing the best cell measurement report, and carrying the cell identifier of the current best cell and the cell identity of one or more neighboring cells entering the reporting range in the best cell measurement report, the most mentioned in this step A good cell refers to a cell with the best wireless quality. On the network side, on the network side, in response to the best cell measurement report of the terminal, related operations such as measurement data maintenance, cell handover, and the like may be performed, and the present invention will not be described in detail. In the embodiment of the present invention, for convenience of description, the time at which the triggered terminal reports the best cell measurement report is referred to as a defect event. The operation of determining whether the trigger condition is met may be specifically described as follows: when the terminal measures the radio quality of the serving cell and the at least one neighboring cell (where the best cell may be the serving cell or one of the neighboring cells), the real time will be The radio quality of the currently measured best cell is compared with the measured radio quality of other cells, and it is judged according to the comparison result whether the trigger condition is satisfied; wherein, in the case where there is a cell whose radio quality is better than the radio quality of the current best cell Next, judge that the trigger condition is met. Example 1 The above process can be better understood with reference to the example given in Fig. 2, wherein Fig. 2 shows the reporting timing for satisfying the trigger condition of the event. In Figure 2, the trigger time, cell individual offset, hysteresis and other parameters are not considered, and the network has not triggered the handover. The terminal is always in the connected state in the serving cell. The network has started the measurement and evaluation of the AX event before the time t1. . As shown in FIG. 2, before the time t1, the serving cell has the best radio quality; at time t1, the best radio quality cell changes from the monthly service cell to the neighbor cell 2, triggering the AX event; at time t2, the radio quality The best cell is changed from the neighboring cell 2 to the neighboring cell 1 to trigger the AX event. At time t3, the best cell of the radio quality changes from the neighboring cell 1 to the serving cell, triggering the AX event; At time t4, the best radio quality cell changes from the serving cell to the neighboring cell 2, triggering an AX event. Example 2 Another situation to be considered is that in the process of measuring the radio quality of the terminal cell and the at least one neighboring cell, the measurement control message of the network side is received again. At this time, the terminal still needs to use the serving cell as the best cell, and judges whether the trigger condition is currently met according to the measurement result; when the trigger condition is met, the terminal reports the best cell measurement report; if the trigger condition is not met The terminal continues to measure the radio quality of the monthly traffic cell and the at least one neighbor cell. The above process can be better understood with reference to the example given in Fig. 3, wherein Fig. 3 shows the reporting timing for satisfying the trigger condition of the AX event. Similar to FIG. 2, in FIG. 3, parameters such as trigger time, cell individual offset, hysteresis, etc. are not considered, and the network has not triggered the handover, and the terminal is always in the connected state in the serving cell. As shown in Figure 3: Before the time t1, the quality of the serving cell begins to decrease. At this time, because the network side has not sent the measurement control message, the network side does not know the wireless quality of the location of the terminal. At time t1, the terminal Receiving a measurement control message sent by the network, instructing the terminal to perform AX event measurement, and the terminal considers that the quality of the serving cell is the best as the initial state of the AX event evaluation before starting the event evaluation; at time t2, the terminal detects the neighboring area. The quality of 1 is the best, better than the serving cell, that is, the best cell changes, triggering the AX event; after that, the quality of the neighboring area 1 begins to decline, the quality of the neighboring area 2 begins to get better, and at the time t3, the quality of the adjacent area 2 It becomes the best to trigger the AX event. At time t4, the terminal receives the measurement control message on the network side. The measurement control message is the same as the measurement control received at time t1. At this time, the terminal re-thinks that the monthly quality of the traffic is the most. Well, as the initial state of the AX event evaluation, since the terminal already knows the radio quality of the neighboring cell when receiving the measurement control message, Therefore, the AX event is triggered immediately; at time t5, the terminal receives the measurement stop message, requests to stop the AX event evaluation, and the terminal stops measuring the neighboring area; at time t6, the terminal receives the measurement control message of the AX event on the network side. Terminal re The quality of the serving cell is considered to be the best as the initial state of the AX event evaluation. At time t7, the terminal detects that the quality of the neighboring cell 2 is the best, which is better than the serving cell, that is, the best cell changes, triggering the AX event. As shown in the above, in the best cell measurement report, in addition to the cell identifier of the current best cell, the cell identifier of the other one or more neighboring cells that enter the reporting range is further carried, where the neighboring area of the reporting range is entered. A cell is a neighboring cell whose difference between the radio quality and the radio quality of the serving cell is less than a predetermined offset. The number of cell identifiers carried in the best cell measurement report may be pre-defined by the network side in the measurement control message. FIG. 4 is a schematic diagram showing a cell identifier of one or more neighboring cells carrying an entry reporting range in an optimal cell measurement report. As shown in FIG. 4, the monthly service cell is the best cell before time t, and at time t, the quality of the neighboring cell 3 becomes the best, triggering the AX event. The terminal needs to carry the measurement results of multiple neighboring cells to the network and the network. If the threshold for entering the reporting range is shown by the dotted line "Threshold 1" in Figure 4. If the network requires the terminal to have up to 4 艮 6 neighboring cells, in Figure 4, in addition to the neighboring zone 3, the neighboring zone 1 and the neighboring zone 4 meet the conditions, and the terminal will report three neighboring zones, respectively: Zone 3, Neighbor 1 and Neighbor 4. If the network requires the terminal to have up to 4 艮 2 neighboring cells, in Figure 4, in addition to the neighboring zone 3, there are also neighboring zone 1 and neighboring zone 4 that meet the conditions, but since it is stipulated that only two neighboring zones can be reported, it is preferred. Ground, the terminal will only report to the network side of the neighboring area 3 and the neighboring area. Preferably, before reporting the best cell measurement report, the terminal sorts the neighboring cells that enter the reporting range, and carries the corresponding cell identifier in the best cell measurement report according to the sorting order. For example, in the example given above, the result of the sorting is: neighboring area 3, neighboring area 1, and neighboring area 4. In this way, you can perform the upper 4艮 according to the order of sorting, or select the neighboring area in the previous order for reporting. It should be noted that, in the best cell measurement report, in addition to carrying the cell identifier of the relevant cell, the specific measurement result of the corresponding cell may be carried, and the detailed description is not described herein. Within the scope of protection. It can be seen from the above description that the network side can always know which cell is the best cell with the best radio quality according to the AX event. Apparatus Embodiment According to an embodiment of the present invention, a measurement report reporting apparatus is provided, the apparatus being located on a terminal side. Fig. 5 shows a block diagram of the structure of the apparatus. As shown in FIG. 5, the measurement report reporting device in the embodiment of the present invention includes a receiving module 502, a setting module 504, a measuring module 506, and a reporting module 508. Each of the above modules will be described in detail below with reference to FIG. The receiving module 502 is configured to receive the measurement control message from the network side, where the measurement control message carries the measurement control parameter and the best cell reporting trigger condition, etc. Preferably, the trigger condition is: the best cell changes. The setup module 504 is coupled to the receive module 502 and the measurement module 506 for setting the best cell. It may perform the setting of the best cell when the receiving module 502 receives the measurement control message, or may perform the setting of the best cell according to the measurement result of the measuring module 506. Specifically, when the receiving module 502 receives the measurement control message, the setting module 504 uses the serving cell where the terminal is located as the best cell. When the measurement result of the measurement module shows that the best cell changes, the cell with the best radio quality is used as the best cell. The measurement module 506 is configured to measure the radio quality of the serving cell and the at least one neighboring cell according to the measurement control parameter carried in the measurement control message. In the case that the measurement result of the measurement module 506 indicates that the best cell has changed, the setting module 504 uses the cell with the best radio quality as the best cell. The reporting module 508 is connected to the measurement module 506 and the setting module 504, and is configured to report the best cell measurement report when the measurement result of the measurement module 506 satisfies the trigger condition, where the best cell measurement report carries the current most The cell identity of the good cell and the cell identity of the other one or more neighboring cells entering the reporting range. The neighboring cell that enters the reporting range is the number of cell identifiers carried in the best cell measurement report reported by the reporting module 508, where the difference between the radio quality and the radio quality of the serving cell is less than a predetermined offset. , can be pre-defined in the measurement control message by the network side. It is to be noted that in the above-described apparatus embodiments, the same or similar parts as the method embodiments are omitted to avoid unnecessarily obscuring the present invention; for the same or similar details, the method embodiments can be understood. And implementation. As described above, by the above-mentioned at least one technical solution provided by the present invention, the network side can accurately know that the current best radio quality cell (best cell) is by causing the terminal to report the network side in time when the best cell changes. Which can improve the accuracy of maintenance of measurement data on the network side and effectively support intra-frequency inter-frequency handover. 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. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A measurement report reporting method, which is applied to a network environment including a terminal, a serving cell where the terminal is located, and at least one neighboring cell adjacent to or adjacent to the serving cell, wherein the method includes:

In response to the measurement control message from the network side, the terminal uses the serving cell as the best cell, and the measurement control message carries the measurement control parameter and the trigger condition reported by the best cell measurement report, where the trigger condition is: The change in the good community;

The terminal measures the radio quality of the serving cell and the at least one neighboring cell according to the measurement control parameter carried in the measurement control message, and reports the best cell measurement report if the trigger condition is met. And in the best cell measurement report, carrying the cell identifier of the current best cell and the cell identifier of the other one or more neighboring cells entering the reporting range, where the current best cell is the best wireless quality Community.

The method according to claim 1, wherein the network side pre-determines the number of cell identifiers carried by the best cell measurement report in the measurement control message.

The method according to claim 1, wherein when the terminal measures the radio quality of the serving cell and the at least one neighboring cell, the radio quality and measurement of the currently measured best cell are performed in real time. The radio quality of the other cells is compared, and it is determined whether the trigger condition is met according to the comparison result; wherein, in the case that there is a cell whose radio quality is better than the radio quality of the current best cell, it is judged that the trigger condition is satisfied.

The method according to any one of claims 1 to 3, characterized in that

When the trigger condition is met, the terminal uses the best cell with the current wireless shield as the best cell.

The method according to any one of claims 1 to 3, wherein in the process of measuring, by the terminal, the radio quality of the I service, the area, and the at least one neighboring cell When the measurement control message of the network side is received again, the method further includes the following processing: the terminal uses the serving cell as a best cell;

Determining whether the trigger condition is currently met; When the trigger condition is met, the terminal reports the best cell measurement report;

The terminal continues to measure the radio quality of the serving cell and the at least one neighbor cell if the trigger condition is not met.

The method according to any one of claims 1 to 3, wherein the method further comprises:

The terminal stops the measurement of the radio quality in response to the measurement stop message from the network side.

The method according to any one of claims 1 to 3, wherein the neighboring cell entering the reporting range is that a difference between a radio quality thereof and a radio quality of the serving cell is less than a predetermined offset. Neighboring cell.

The method according to any one of claims 1 to 3, wherein the best cell measurement report further carries a measurement result of a cell corresponding to the carried cell identity.

The method according to any one of claims 1 to 3, wherein, before reporting the best cell measurement report, the terminal sorts other one or more neighboring cells entering the reporting range, And carrying the corresponding cell identifier in the best cell measurement report according to the sorted order.

A measurement report reporting device, located at the terminal side, the device includes: a receiving module, configured to receive a measurement control message from a network side, where the measurement control message carries a measurement control parameter and The best cell reporting triggering condition, where the triggering condition is: the best cell changes;

a setting module, configured to set a best cell;

a measurement module, configured to perform measurement measurement parameters carried in the measurement control message, and measure radio quality of the monthly service, the area, and the at least one neighboring cell;

a reporting module, configured to report a minimum area measurement report, where the measurement result of the measurement module meets the trigger condition, where the best cell measurement report carries a cell identifier of a current best cell and Enter the cell mark of the other one or more neighboring cells in the reporting range.

11. Apparatus according to claim 10 wherein:

When the receiving module receives the measurement control message, the setting module uses the serving cell where the terminal is located as the best cell; or, when the measurement result of the measurement module shows that the best cell changes, the setting The module uses the cell with the best radio quality as the best cell.

12. Apparatus according to claim 10, wherein

The neighboring cell entering the reporting range is a neighboring cell whose difference between the radio quality and the radio quality of the serving cell is less than a predetermined offset;

The number of cell identifiers carried in the best cell measurement report is predetermined by the network side in the measurement control message.