WO2014067122A1

WO2014067122A1 - Method, device and system for negotiating mobility parameter

Info

Publication number: WO2014067122A1
Application number: PCT/CN2012/083933
Authority: WO
Inventors: 张宏卓; 宋平; 奥鲁佛松•亨里克
Original assignee: 华为技术有限公司
Priority date: 2012-11-01
Filing date: 2012-11-01
Publication date: 2014-05-08
Also published as: CN103907372A

Abstract

Provided are a method, a device and a system for negotiating a mobility parameter, wherein the method comprises: a first base station sending a first request message to a second base station, wherein the first request message is used for requesting the second base station to send a first offset of a switch triggering parameter of a second cell, the first offset refers to an offset of a current value of the switch triggering parameter of the second cell relative to a default value, the second base station is an adjacent base station of the first base station, the second base station is a control base station of the second cell, and the second cell is an adjacent cell of a first cell controlled by the first base station; the first base station receiving a first response message sent by the second base station, wherein the first response message contains the first offset. Through the technical scheme, the first base station can provide an accurate advice for the second base station on a subsequent change value of the switch triggering parameter of the second cell according to the first offset.

Description

Method, device and system for negotiating mobility parameters

The present invention relates to the field of communications, and in particular, to a method, device and system for negotiating mobility parameters. Background technique

In a Long Term Evolution (LTE) system, a base station (such as an evolved base station, referred to as an eNB) implements a handover trigger parameter (Handover Trigger) negotiation of a neighboring cell through a mobility change procedure of the X2 interface. The handover trigger parameter indicates the amount of offset that the eNB performs handover for a cell. Specifically, the handover trigger parameter is a threshold. When the threshold is reached, a cell initiates a handover preparation process to a specific neighboring cell. The network administrator configures the default value and valid range of the handover trigger parameter for the eNB.

In the negotiation process of the existing handover trigger parameters, if eNB1 is the control base station of cell 1, eNB2 is the control base station of cell 2, cell 2 is the neighbor cell of cell 1, and eNB1 sends a mobility change request message to eNB2, the request The message carries the change value of the handover trigger parameter of the eNB2 to the cell 2 by the eNB1, and the change value is a change value with respect to the current handover trigger parameter of the cell 2. If the eNB2 accepts the change value suggested by the eNB1 and completes the modification, it transmits a mobility change confirmation message to the eNB1, and if the eNB2 rejects the change value or fails to complete the modification, it transmits a mobility change failure message to the eNB1. If the eNB1 needs the eNB2 to reset the handover triggering parameter of the cell 2, the eNB1 carries the reset identifier in the mobility change request message, and when the eNB2 receives the reset identifier, the handover trigger parameter of the cell 2 is reset to the default value.

In the existing handover trigger parameter negotiation process, there is a case where the offsets of the handover trigger parameters of the cell 2 recorded by the eNB1 and the eNB2 are inconsistent, and the eNB1 cannot accurately determine the change value of the handover trigger parameter of the subsequent proposed eNB2 to the cell 2. . Summary of the invention

Embodiments of the present invention provide a method, device, and system for negotiating mobility parameters. The technical solution is as follows.

A first aspect, a method for negotiating a mobility parameter, the method includes: the first base station sending a first request message to a second base station, where the first request message is used to request the second base station to send a second cell a first offset of the handover triggering parameter, where the first offset is an offset of a current value of a handover trigger parameter of the second cell with respect to a default value, where the second base station is the first a neighboring base station of a base station, the second base station is a control base station of the second cell, the second cell is a neighboring cell of the first cell under the control of the first base station; The first response message sent by the second base station, where the first response message includes the first offset.

In a first possible implementation manner of the first aspect, the first request message includes: a cell identifier of the first cell, a cell identifier of the second cell, and a request for the second The base station sends the request identifier of the first offset. The request identifier includes an implicit identifier or an explicit identifier. The implicit identifier includes: the first base station suggests that a change value of the mobility parameter of the second base station is 0; or, the first base station proposes a change value and a location of a mobility parameter of the second base station The change value of the mobility parameter of the first base station is 0.

In a second possible implementation manner of the first aspect, the method further includes: determining, by the first base station, whether a handover trigger parameter of the second cell needs to be adjusted according to the first offset; The first base station determines, according to the first offset, that the handover triggering parameter of the second cell needs to be adjusted, and the first base station sends a second request message to the second base station, where the second request message is sent. And configured to request the second base station to adjust a handover trigger parameter of the second cell.

The determining, by the first base station, whether the handover triggering parameter of the second cell needs to be adjusted according to the first offset, includes: the first base station obtaining a second offset according to the first offset The second offset indicates that the first base station proposes that the second base station performs a handover trigger parameter adjustment on the second cell, and if the second offset is not equal to 0, the first Determining, by the base station, that the handover trigger parameter of the second cell needs to be adjusted; the second request message is further used to request the The second base station adjusts a handover trigger parameter of the second cell according to the second offset. The first base station obtains the second offset according to the first offset, where: the first base station calculates, by the first base station, that the second base station that is recorded by the first base station should be used by the second cell And switching a first difference between the value of the triggering parameter adjustment and the first offset sent by the second base station, and using the first difference as the second offset; or, the first base station Calculating a second difference between the value that the first base station expects the second base station to adjust the handover trigger parameter of the second cell and the first offset sent by the second base station, and the second The difference is used as the second offset; or, if the first base station expects the second base station to reset the handover trigger parameter of the second cell, the second base station will use the first offset The negative value of the quantity is taken as the second offset.

In a third possible implementation manner of the first aspect, the method further includes: the first base station receiving a second response message sent by the second base station, where the second response message indicates the first The handover trigger parameter adjustment of the second cell to the second cell succeeds or fails.

In a fourth possible implementation manner of the first aspect, the first request message further includes a reason for adjusting a handover trigger parameter. Correspondingly, the first offset included in the first response message is an offset corresponding to the cause.

The reason for adjusting the handover trigger parameter includes: a cause related to the mobility load balancing MLB or a reason related to the mobility robust optimization MRO. If the reason for adjusting the handover trigger parameter included in the first request message is the reason related to the MLB, the first request message indicates that the second base station is requested to send the second generated due to the cause of the MLB. The offset of the handover trigger parameter of the cell. If the reason for adjusting the handover trigger parameter included in the first request message is the reason related to the MRO, the first request message indicates that the second base station is requested to send the second generated due to the reason of the MRO The offset of the handover trigger parameter of the cell, or the first request message indicates that the second base station is requested to send the offset of the handover trigger parameter of the second cell that is caused by the cause of the MRO and the cause of the MLB. The sum of the quantities.

In a second aspect, a base station is configured to control a first cell, where the base station includes: a first sending unit, configured to send a first request message to a neighboring base station, where the first request message is used to request a Transmitting, by the neighboring base station, a first offset of the handover trigger parameter of the second cell, where the first offset is an offset of a current value of the handover trigger parameter of the second cell with respect to a default value, where The neighboring base station is the control base station of the second cell, the second cell is a neighboring cell of the first cell, and the first receiving unit is configured to receive the first response message sent by the neighboring base station The first response message includes the first offset.

In a first possible implementation manner of the second aspect, the first request message sent by the first sending unit includes: a cell identifier of the first cell, a cell identifier of the second cell, and And requesting the neighboring base station to send the request identifier of the first offset. The request identifier includes an implicit identifier or an explicit identifier. The implicit identifier includes: the base station suggests that a change value of a mobility parameter of the neighboring base station is 0; or, the base station proposes a change value of a mobility parameter of the neighboring base station and a mobility of the base station The change value of the sex parameter is 0.

In a second possible implementation manner of the second aspect, the base station further includes: a determining unit, configured to determine, according to the first offset received by the first receiving unit, the second cell And the second sending unit is configured to: when the determining result of the determining unit is that the handover triggering parameter of the second cell needs to be adjusted, sending a second request message to the neighboring base station, where The second request message is used to request the neighboring base station to adjust a handover trigger parameter of the second cell.

The determining unit further includes: a processing subunit, configured to obtain a second offset according to the first offset, where the second offset indicates that the neighboring base station is recommended to the second cell And performing a handover trigger parameter adjustment; and determining a subunit, if the second offset obtained by the processing subunit is not equal to 0, determining that the handover trigger parameter of the second cell needs to be adjusted; The second request message sent by the sending unit is further used to request the neighboring base station to adjust a handover trigger parameter of the second cell according to the second offset. The processing sub-unit is further configured to: calculate, by the base station, a value that the neighboring base station should adjust the handover trigger parameter of the second cell, and the first offset that is received by the first receiving unit a first difference of the quantity, and using the first difference as the second offset; or calculating, by the base station, that the neighboring base station is to use the second cell And switching a second difference between the value of the trigger parameter adjustment and the first offset received by the first receiving unit, and using the second difference as the second offset; or A negative value of an offset is used as the second offset.

In a third possible implementation of the second aspect, the base station further includes: a second receiving unit, configured to receive a second response message sent by the neighboring base station, where the second response message indicates The handover trigger parameter adjustment of the neighboring base station to the second cell succeeds or fails.

In the fourth possible implementation manner of the second aspect, the first request message sent by the first sending unit further includes a reason for adjusting a handover trigger parameter. Correspondingly, the first offset included in the first response message received by the first receiving unit is an offset amount corresponding to the cause.

The reason for adjusting the handover trigger parameter includes: a cause related to the mobility load balancing MLB or a reason related to the mobility robust optimization MRO. If the reason for adjusting the handover trigger parameter included in the first request message sent by the first sending unit is the MLB-related reason, the first request message indicates that the neighboring base station is requested to send due to the MLB. The cause of the offset of the handover trigger parameter of the second cell. If the reason for adjusting the handover trigger parameter included in the first request message sent by the first sending unit is the reason related to the MRO, the first request message indicates that the neighboring base station is requested to be sent due to the MRO The offset of the handover trigger parameter of the second cell generated by the cause, or the first request message indicates that the neighboring base station is requested to send the second due to the cause of the MRO and the cause of the MLB The handover of the cell triggers the sum of the offsets of the parameters.

In a third aspect, a base station includes a memory and a processor for performing a method of mobility parameter negotiation as described above.

A fourth aspect, a communication system, comprising: a base station as described above, further comprising a neighboring base station of the base station, where the neighboring base station is configured to receive a first request message sent by the base station, and The base station sends a first response message, where the first response message includes a first offset of the handover trigger parameter of the second cell. With the technical solution, the first base station can learn the offset of the current value of the handover trigger parameter of the second cell with respect to the default value, so as to obtain the cumulative value of the modification performed by the second base station on the handover trigger parameter of the second cell, Therefore, the first base station can accurately recommend the change value of the handover trigger parameter of the second base station to the second cell according to the offset. DRAWINGS

1 is a flowchart of a method for negotiating mobility parameters according to an embodiment of the present invention; FIG. 2 is a flowchart of another method for negotiating mobility parameters according to an embodiment of the present invention; A flow chart of a method for adjusting a mobility parameter; FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a communication system according to an embodiment of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. As shown in FIG. 1, this embodiment provides a method for negotiating mobility parameters, and the method includes the following content.

The first base station sends a first request message to the second base station, where the first request message is used to request the second base station to send a first offset of the handover trigger parameter of the second cell. The first offset refers to an offset of a current value of a handover trigger parameter of the second cell with respect to a default value, where the second base station is a neighboring base station of the first base station, and the second The base station is a control base station of the second cell, and the second cell is a neighboring cell of the first cell under the control of the first base station.

Optionally, the default value may be an initial value of a handover trigger parameter configured by the network management (for example, an operation management and maintenance system) to the cell 2.

As an optional embodiment, the first request message includes: a cell identifier of the first cell And a cell identifier of the second cell and a request identifier for requesting the second base station to send the first offset. Optionally, the request identifier includes an implicit identifier or an explicit identifier. In a specific implementation process, the implicit identifier includes: the first base station suggests that a change value of the mobility parameter of the second base station is 0; or, the first base station recommends that the second base station move The change value of the sex parameter and the change value of the mobility parameter of the first base station are both zero.

102. The first base station receives a first response message sent by the second base station, where the first response message includes the first offset.

With the technical solution provided by the embodiment, the first base station may learn the offset of the current value of the handover trigger parameter of the second cell with respect to the default value, that is, the modification of the handover trigger parameter of the second cell by the second base station. The accumulated value, therefore, the first base station can accurately recommend the change value of the handover trigger parameter of the second base station to the second cell according to the offset.

As another optional embodiment, the method may further include: determining, by the first base station, whether a handover trigger parameter of the second cell needs to be adjusted according to the first offset; Determining that the handover trigger parameter of the second cell needs to be adjusted, the first base station sends a second request message to the second base station, where the second request message is used to request the second The base station adjusts a handover trigger parameter of the second cell.

The determining, by the first base station, whether the handover triggering parameter of the second cell needs to be adjusted according to the first offset, includes: the first base station obtaining a second offset according to the first offset The second offset indicates that the first base station proposes that the second base station performs a handover trigger parameter adjustment on the second cell, and if the second offset is not equal to 0, the first A base station determines that the handover trigger parameter of the second cell needs to be adjusted. Correspondingly, the second request message is further configured to request the second base station to adjust a handover trigger parameter of the second cell according to the second offset.

Further, the first base station obtains the second offset according to the first offset, and the method includes: the first base station calculates, by the first base station, the second base station that is recorded by the first base station, to the second cell a first difference between the adjusted value of the handover trigger parameter and the first offset sent by the second base station, and the first difference is used as the second offset; or A base station calculates the first base station expectation The second base station compares a value of the handover trigger parameter of the second cell with a second difference of the first offset sent by the second base station, and uses the second difference as the a second offset; or, if the first base station expects the second base station to reset a handover trigger parameter of the second cell, the second base station uses a negative value of the first offset as a The second offset is described.

Optionally, the first base station receives the second response message sent by the second base station, where the second response message indicates that the handover trigger parameter adjustment of the second cell by the second base station succeeds or fails.

According to the foregoing optional embodiment, the first base station may, according to the first offset of the second cell that is fed back by the second base station, suggest that the second base station adjusts the handover trigger parameter of the second cell, so that the second base station is configured to the second cell. The modification of the handover triggering parameter is consistent with the modification recorded by the first base station or the modification expected by the first base station, which avoids the impact of the switchover and the network performance caused by the simple reset when the parameter adjustment is inconsistent in the prior art.

As a further optional embodiment, the first request message in the foregoing embodiment may further include a reason for adjusting the handover trigger parameter, and correspondingly, the first offset included in the first response message in the foregoing embodiment. Is the offset corresponding to the reason. The reasons for adjusting the handover trigger parameters include: reasons related to Mobility Load Balancing (MLB) or reasons related to Mobility Robust Optimisation (MRO). If the reason for adjusting the handover trigger parameter included in the first request message is the reason related to the MLB, the first request message indicates that the second base station is requested to send the second generated due to the cause of the MLB. The offset of the handover trigger parameter of the cell. If the reason for adjusting the handover trigger parameter included in the first request message is the reason related to MR0, the first request message indicates that the second base station is requested to send the second generated due to the cause of MR0. The offset of the handover trigger parameter of the cell; or the first request message indicates that the second base station is requested to send the offset of the handover trigger parameter of the second cell that is caused by the cause of the MR0 and the cause of the MLB. The sum of the quantities.

With the foregoing optional embodiment, the first base station may be configured to modify the handover triggering parameter of the second cell by the second base station, which is generated by the second base station, to ensure the handover triggering parameter of the second base station to the second cell suggested by the subsequent first base station. The adjustments made are more targeted. As shown in FIG. 2, this embodiment provides a method for negotiating mobility parameters. In this embodiment, eNB2 is a neighboring base station of eNB1, eNB1 is a control base station of cell 1, eNB2 is a control base station of cell 2, and cell 2 is a neighboring cell of cell 1, that is, cell 2 is cell 1 under the control of eNB1. Adjacent cell. The method includes the following.

201. The eNB1 sends a first request message to the eNB2, where the first request message is used to request the eNB2 to send a first offset of the handover trigger parameter of the cell 2. The first offset refers to the offset of the current value of the handover trigger parameter of the cell 2 from the default value. Optionally, the default value may be an initial value of a handover trigger parameter configured by the network management (for example, an operation management and maintenance system) to the cell 2.

As an optional embodiment, the first request message may be a mobility change request (eg

a message, the message may include: an identifier of the cell 1 controlled by the eNB1 (for example, eNB1 Cell ID), an identifier of the cell 2 controlled by the eNB2 (for example, an eNB2 Cell ID), and a request identifier (flag), where The request identifier is used to request the eNB2 to transmit a first offset of the cell 2 handover trigger parameter. Optionally, the request identifier may be an explicit identifier, that is, an identifier directly indicating that the requesting eNB2 sends the first offset, such as an offset request identifier. The request identifier may also be an implicit identifier, that is, the specific value of the specific cell implicitly indicates that the requesting eNB2 sends the first offset of the cell 2. For example, the eNB1 included in the request message suggests the mobility of the eNB2. The change value of the parameter is 0 (for example, eNB2 Proposed Mobility Parameters = 0), or the change value of the mobility parameter of eNB1 is 0 (for example, eNB1 Mobility Parameters = 0) and eNB1 suggests that the change value of the mobility parameter of eNB2 is 0 (for example eNB2 Proposed Mobility Parameters=0). That is, when the eNB2 Proposed Mobility Parameters=0 included in the MOBILITY CHANGE REQEUST message, or when the eNB1 Mobility Parameters=0 and the eNB2 Proposed Mobility Parameters=0 included in the MOBILITY CHANGE REQEUST message, it indicates that the eNB1 requests the eNB2 to return the The handover of cell 2 triggers a first offset of the parameter.

202. The eNB1 receives the eNB2 and sends a first response message, where the response message includes the first offset. In a specific implementation process, the first response message in 102 may be a MOBILITY CHANGE ACKNOWLEDE message, that is, the first offset is included in the MOBILITY CHANGE ACKNOWLEDE message, for example, in the MOBILITY CHANGE ACKNOWLEDE message. The Handover Trigger Offset cell represents the first offset.

With the technical solution provided by the embodiment, the eNB1 can learn the offset of the current value of the handover trigger parameter of the cell 2 with respect to the default value, so as to obtain the cumulative value of the modification of the handover trigger parameter of the cell 2 by the eNB2, therefore, the eNB1 The change value of the handover trigger parameter of the subsequent eNB2 to the cell 2 can be accurately suggested according to the offset.

As an optional embodiment, the first request message in the 201 may further include a reason for adjusting the handover trigger parameter. For example, the reason associated with MLB or the reason associated with MRO. Among them, the reasons related to MLB include Resource Optimisation Handover (ROH) and Reduce Load in Serving Cell. The reasons related to MRO include Handover Desirable for Radio Reasons (HDRR). ) and Time Critical Handover (TCH).

As an optional embodiment, if the first request message includes a cause related to the MLB, the first request message indicates that the eNB1 requests the eNB2 to send the handover of the cell 2 due to the cause of the MLB. The offset of the trigger parameter. For example, the default value of the handover trigger parameter of the cell 2 is 5 db. The eNB 2 changes the handover trigger parameter of the cell 2 to 7 db due to the MLB, and the offset of the handover trigger parameter of the cell 2 due to the MLB is 2db.

As another optional embodiment, if the reason for adjusting the handover trigger parameter included in the first request message is the reason related to the MRO, the first request message indicates that the eNB1 requests the eNB2 to send a The offset of the handover trigger parameter of the cell 2 generated by the cause of the MRO. For example, the default value of the handover trigger parameter of cell 2 is 5db. Due to the MRO, eNB2 changes the handover trigger parameter of cell 2 to 9db. Then, the offset of the switching trigger parameter due to the MRO is 4 db.

As another optional embodiment, if the adjustment handover trigger parameter included in the first request message The reason is related to the MRO, the first request message indicates that the eNB1 requests the eNB2 to send the offset of the handover trigger parameter of the cell 2 due to the cause of the MRO and the cause of the MLB. The sum of the quantities. For example, the default value of the handover trigger parameter of the cell 2 is 5 db. The eNB 2 modifies the handover trigger parameter of the cell 2 to 7 db due to the MLB. The eNB 2 changes the handover trigger parameter of the cell 2 to 9 db due to the MRO. Then, the offset of the handover trigger parameter generated by the MLB is 2 db, and the offset of the handover trigger parameter generated by the MRO is 4 db, which is caused by the cause of the MRO and the MLB. The sum of the offsets of the toggle trigger parameters is (2db+4db), which is 6db. In the specific implementation process, eNB2 may modify the default value of 5db to 7db or 9db after multiple adjustments, or modify the default value from 5db to 7db or 9db at one time.

With the foregoing optional embodiment, the eNB1 can learn the modification of the handover triggering parameter of the eNB2 to the cell 2, which is generated by the eNB2 to ensure that the adjustment of the handover triggering parameter of the cell 2 proposed by the eNB1 is more targeted.

As another optional embodiment, after the 201, the eNB1 does not receive the first response message fed back by the eNB2, that is, the eNB1 does not receive the first offset of the handover trigger parameter of the cell 2, Then, the eNB1 sends a handover trigger parameter reset failure message, or a handover trigger parameter inconsistency alarm message, or a handover trigger parameter negotiation failure message to the network management system (such as the network element management system or the operation and maintenance management system). The message includes the cell identity of the cell 1 and the cell identity of the cell 2. In a specific implementation process, the eNB1 may set a timer, and after the eNB1 sends the first request message, start the timer. When the timer expires, the eNB1 still does not receive the first response sent by the eNB2. When the message is received, the eNB1 sends the message to the network management. As shown in FIG. 3, based on the embodiment shown in FIG. 2, this embodiment provides a method for adjusting mobility parameters. In this embodiment, eNB1 is the control base station of cell 1, eNB2 is the control base station of cell 2, eNB2 is the neighboring base station of eNB1, and cell 2 is the neighboring cell of cell 1, that is, cell 2 is cell 1 under the control of eNB1. Adjacent cell. The method includes the following. 301-302, the content is the same as 201-202. For details, refer to the embodiment shown in Figure 2, and details are not described herein.

303. The eNB1 determines, according to the first offset, whether the handover trigger parameter of the cell 2 needs to be adjusted. If the eNB1 determines, according to the first offset, that the handover trigger parameter of the cell 2 needs to be adjusted, Then execute 304.

Specifically, the determining, by the eNB, whether the handover trigger parameter of the cell 2 needs to be adjusted according to the first offset, the method includes: the eNB1 obtaining a second offset according to the first offset, where the second The offset indicates that the eNB1 suggests that the eNB2 performs handover trigger parameter adjustment on the cell 2. If the second offset is not equal to 0, the eNB1 determines that the handover trigger parameter of the cell 2 needs to be Adjustment.

Alternatively, if the second offset in 303 is equal to 0, 304 may not be performed.

In a specific implementation process, the method for obtaining the second offset by the eNB1 according to the first offset may be multiple, including but not limited to the methods of the following three alternative embodiments.

As an optional embodiment, the eNB1 calculates, by the eNB1, a first difference between a value that the eNB2 should adjust the handover trigger parameter of the cell 2 and the first offset that is sent by the eNB2. a value, and the first difference is used as the second offset. For example, if the eNB2 recorded by the eNB1 should adjust the handover trigger parameter 5db of the cell 2, and the first offset fed back by the eNB2 is 4db, the eNB1 calculates (5db-4db) and obtains the second offset as ldb. Correspondingly, the value of the eNB2 Proposed Mobility Parameters in the second request message sent by the eNB1 to the eNB2 is ldb, that is, the eNB1 requests the eNB2 to adjust the handover trigger parameter of the cell 2 to ldb. In addition, if the eNB1 calculates that the second offset is 0, indicating that the value of the handover trigger parameter that the eNB2 described in the eNB1 should adjust is consistent with the value of the handover trigger parameter actually adjusted by the eNB2, the eNB1 may not request the eNB2 to adjust subsequently. The handover trigger parameter of the cell 2, that is, the 303 may not be executed 304, and the process ends.

As another optional embodiment, the eNB1 calculates a second difference between the value that the eNB1 expects the eNB2 to adjust the handover trigger parameter of the cell 2 and the first offset that is sent by the eNB2, and The second difference is used as the second offset. For example, if eNB1 expects eNB2 to be small The handover trigger parameter of zone 2 is adjusted by 5db, and the first offset of eNB2 feedback is 6db, then eNB1 calculates (5db-6db), and the obtained second offset is -ldb. Correspondingly, the value of the eNB2 Proposed Mobility Parameters in the second request message sent by the eNB1 to the eNB2 is -ldb, that is, the eNB1 requests the eNB2 to adjust the handover trigger parameter of the cell 2 to -ldb. In addition, if the eNB1 calculates that the second offset is 0, indicating that the value of the handover trigger parameter that the eNB1 expects the eNB2 to adjust is consistent with the value of the handover trigger parameter actually adjusted by the eNB2, the eNB1 may not request the eNB2 to adjust the cell 2 subsequently. Switch the trigger parameter, that is, after 303, do not execute 304, and end the process.

As still another optional embodiment, if the eNB1 expects the eNB2 to reset the handover trigger parameter of the cell 2, the eNB2 uses the negative value of the first offset as the second offset. . For example, if eNB1 expects eNB2 to reset the handover trigger parameter of cell 2, and eNB1 receives the first offset fed back by eNB2 as 5 db, then eNB1 uses -5db as the second offset, and correspondingly, eNB1 sends to eNB2. The value of the eNB2 Proposed Mobility Parameters is -5db, that is, the eNB1 requests the eNB2 to adjust the handover trigger parameter of the cell 2 to -5db.

304. The eNB1 sends a second request message to the eNB2, where the second request message is used to request the eNB2 to adjust a handover trigger parameter of the cell 2.

Specifically, the second request message is further configured to request the eNB2 to adjust a handover trigger parameter of the cell 2 according to the second offset.

As an optional embodiment, the second request message may be a mobility change request message (for example, MOBILITY CHANGE REQEUST), where the message may include: an identifier of the cell 1 controlled by the eNB1 (eg, eNB1 Cell ID), controlled by the eNB2 The identity of cell 2 (e.g., eNB2 Cell ID) and the second offset, where the second offset can be represented by eNB2 Proposed Mobility Parameters.

305. The eNB1 receives the second response message sent by the eNB2, where the second response message includes a message indicating that the handover trigger parameter is successfully adjusted or a message indicating that the handover trigger parameter adjustment fails. 305 is an optional step.

For example, the second response message may be a mobility change confirmation (MOBILITY CHANGE ACKNOLEDGE ) Message or mobility change failed (MOBILITY CHANGE FAILURE ) message. Optionally, the MOBILITY CHANGE FAILURE message may also carry a reason for the reset failure, for example, the parameter modification is out of range.

Through the foregoing embodiment, the eNB1 may suggest that the eNB2 adjusts the handover trigger parameter of the cell 2 according to the first offset of the cell 2 fed back by the eNB2, so that the modification of the handover trigger parameter of the eNB2 to the cell 2 and the modification recorded by the eNB1 or the eNB1 The expected modifications are consistent, avoiding the impact of switching dropped calls and network performance caused by simple reset to default values when parameter adjustment is inconsistent in the prior art. As shown in FIG. 4, the embodiment provides a base station 400, where the base station 400 is configured to control a first cell, where the base station 400 includes: a first sending unit 401 and a first receiving unit 402. The base station 400 provided in this embodiment can implement the method embodiment shown in FIG. 2 and FIG. 3, and the specific implementation manner refers to the foregoing method embodiment, and details are not described herein again.

Specifically, the first sending unit 401 is configured to send a first request message to a neighboring base station, where the first request message is used to request the neighboring base station to send a first offset of a handover trigger parameter of the second cell. The first offset refers to an offset of a current value of a handover trigger parameter of the second cell with respect to a default value, where the neighboring base station is a control base station of the second cell, and the second The cell is a neighboring cell of the first cell. The first receiving unit 402 is configured to receive a first response message sent by the neighboring base station, where the first response message includes the first offset.

Optionally, the first request message sent by the first sending unit 401 includes: a cell identifier of the first cell, a cell identifier of the second cell, and a request for the neighboring base station to send the An offset request identifier. The request identifier includes an implicit identifier or an explicit identifier. The implicit identifier includes: the base station 400 suggests that the change value of the mobility parameter of the neighboring base station is 0; or the base station 400 suggests a change value of the mobility parameter of the neighboring base station and the base station The change value of the mobility parameter of 400 is 0.

Optionally, the base station 400 further includes: a determining unit 403 and a second sending unit 404. The determining unit 403 is configured to determine, according to the first offset received by the first receiving unit 401, whether a handover trigger parameter of the second cell needs to be adjusted. The second sending unit 404 is configured to: when the determining result of the determining unit 403 is that the handover triggering parameter of the second cell needs to be adjusted, send a second request message to the neighboring base station, where the second request message is sent And configured to request the neighboring base station to adjust a handover trigger parameter of the second cell.

Further, the determining unit 403 further includes: a processing subunit 4031 and a judging subunit 4032.

The processing sub-unit 4031 is configured to obtain a second offset according to the first offset, where the second offset indicates a value that is recommended to the neighboring base station to perform handover trigger parameter adjustment on the second cell. . The determining sub-unit 4032 is configured to determine that the handover trigger parameter of the second cell needs to be adjusted if the second offset obtained by the processing sub-unit 4031 is not equal to 0. The second request message sent by the second sending unit 404 is further configured to request the neighboring base station to adjust a handover trigger parameter of the second cell according to the second offset.

Specifically, the processing sub-unit 4031 is further configured to: calculate, by the base station, a value that the neighboring base station should adjust the handover trigger parameter of the second cell, and where the first receiving unit 401 receives Determining a first difference of the first offset, and using the first difference as the second offset; or calculating, by the base station, the handover triggering parameter of the second cell by the neighboring base station Adjusting a second difference between the adjusted value and the first offset received by the first receiving unit 401, and using the second difference as the second offset; or A negative value of the shift amount is taken as the second offset.

Optionally, the base station 400 further includes: a second receiving unit 405, configured to receive a second response message sent by the neighboring base station, where the second response message indicates that the neighboring base station is in the second cell The switch triggers the parameter adjustment success or failure.

Optionally, the first request message sent by the first sending unit 401 of the first book further includes a reason for adjusting the switching trigger parameter. Correspondingly, the first offset included in the first response message received by the first receiving unit 402 is an offset corresponding to the cause.

The reason for adjusting the handover trigger parameter includes: a reason related to the MLB or with the MRO Related reasons. If the reason for adjusting the handover trigger parameter included in the first request message sent by the first sending unit 401 is the reason related to the MLB, the first request message indicates that the neighboring base station is requested to send the The offset of the handover trigger parameter of the second cell generated by the cause of the MLB. If the reason for adjusting the handover trigger parameter included in the first request message sent by the first sending unit 401 is the reason related to the MRO, the first request message indicates that the neighboring base station is requested to send the The offset of the handover trigger parameter of the second cell generated by the cause of the MRO, or the first request message indicates that the neighboring base station is requested to send the reason due to the cause of the MRO and the cause of the MLB The switching of the two cells triggers the sum of the offsets of the parameters.

With the base station provided by the foregoing embodiment, the base station may, according to the first offset of the neighboring cell fed back by the neighboring base station, suggest that the neighboring base station adjust the handover triggering parameter of the neighboring cell, so that the neighboring base station pairs the neighboring cell. The modification of the handover triggering parameter is consistent with the modification or the desired modification of the base station record provided by the present invention, which avoids the switchover and the network caused by the simple reset to the default value when the parameter adjustment is inconsistent in the prior art. The impact of performance. As shown in FIG. 5, the embodiment provides a base station 500, which includes a memory 501 and a processor 502, and is configured to perform the method provided in the embodiment shown in FIG. 2 and FIG. The contents of the illustrated embodiment.

With the base station provided by the foregoing embodiment, the base station may, according to the first offset of the neighboring cell fed back by the neighboring base station, suggest that the neighboring base station adjust the handover triggering parameter of the neighboring cell, so that the neighboring base station pairs the neighboring cell. The modification of the handover triggering parameter is consistent with the modification or the desired modification of the base station record provided by the present invention, which avoids the switchover and the network caused by the simple reset to the default value when the parameter adjustment is inconsistent in the prior art. The impact of performance. As shown in FIG. 6, the embodiment provides a communication system 600. The communication system 600 includes the base station 400 provided by the embodiment shown in FIG. 4. For details, refer to the content of the embodiment shown in FIG. The communication system 600 further includes a neighboring base station 601 of the base station 400, the neighboring base station 601 is configured to receive the base station The first request message sent by the 400, and the first response message is sent to the base station 400, where the first response message includes a first offset of the handover trigger parameter of the second cell.

Through the communication system provided by the foregoing embodiment, the base station 400 may suggest that the neighboring base station 601 adjusts the handover trigger parameter of the neighboring cell according to the first offset of the neighboring cell fed back by the neighboring base station 601, so that the neighboring base station 601 is adjusted. The modification of the handover trigger parameter of the neighboring cell is consistent with the modification or the desired modification recorded by the base station 400, which avoids the switchover and the pair caused by the simple reset to the default value when the parameter adjustment is inconsistent in the prior art. The impact of network performance.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, can also be implemented by hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer, a hard disk or an optical disk, etc., including a plurality of instructions for making a A computer device (which may be a personal computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A mobility parameter negotiation method, characterized in that the method includes:

The first base station sends a first request message to the second base station, the first request message is used to request the second base station to send a first offset of the handover trigger parameter of the second cell, the first offset is Refers to the offset of the current value of the handover trigger parameter of the second cell relative to the default value, the second base station is an adjacent base station of the first base station, and the second base station is the second base station of the second cell. Controlling the base station, the second cell is a neighboring cell of the first cell under the control of the first base station;

The first base station receives a first response message sent by the second base station, and the first response message contains the first offset.

2. The method according to claim 1, characterized in that the first request message includes: a cell identity of the first cell, a cell identity of the second cell and a method for requesting the second base station. Send the request identifier of the first offset.

3. The method according to claim 2, characterized in that the request identification includes an implicit identification or an explicit identification.

4. The method according to claim 3, characterized in that, the implicit identification includes: the first base station recommends that the change value of the mobility parameter of the second base station is 0; or, the first base station It is recommended that the change value of the mobility parameter of the second base station and the change value of the mobility parameter of the first base station are both 0.

5. The method according to any one of claims 1 to 4, characterized in that, the method further includes: the first base station determines whether the handover trigger parameter of the second cell is needed based on the first offset. Adjustment;

If the first base station determines that the handover trigger parameter of the second cell needs to be adjusted based on the first offset, the first base station sends a second request message to the second base station, and the second request The message is used to request the second base station to adjust the handover trigger parameters of the second cell.

6. The method according to claim 5, characterized in that, the first base station operates according to the first The offset determines whether the handover trigger parameter of the second cell needs to be adjusted, including: the first base station obtains a second offset according to the first offset, and the second offset represents the third offset. A base station recommends that the second base station adjust the handover trigger parameter of the second cell. If the second offset is not equal to 0, the first base station determines the handover trigger parameter of the second cell. Adjustment is required; The second request message is further used to request the second base station to adjust the handover trigger parameter of the second cell according to the second offset.

7. The method according to claim 6, wherein the first base station obtains the second offset based on the first offset, including:

The first base station calculates the first difference between the value recorded by the first base station that the second base station should adjust the handover trigger parameter of the second cell and the first offset sent by the second base station. difference, and use the first difference as the second offset; or,

The first base station calculates a second difference between the value that the first base station expects the second base station to adjust the handover trigger parameter of the second cell and the first offset sent by the second base station, and use the second difference as the second offset; or,

If the first base station expects the second base station to reset the handover trigger parameter of the second cell, the second base station uses the negative value of the first offset as the second offset.

8. The method according to any one of claims 5-7, characterized in that, the method further includes: the first base station receiving a second response message sent by the second base station, the second response message indicating The second base station successfully or fails to adjust the handover trigger parameter of the second cell.

9. The method according to any one of claims 1 to 8, characterized in that the first request message also contains the reason for adjusting the switching trigger parameter.

10. The method according to claim 9, wherein the first offset contained in the first response message is an offset corresponding to the cause.

11. The method according to claim 9 or 10, characterized in that the reasons for adjusting the handover trigger parameters include: reasons related to mobility load balancing MLB or reasons related to mobility robust optimization MRO.

12. The method according to claim 11, characterized in that, if the reason for adjusting the switching trigger parameter contained in the first request message is the MLB-related reason, the first request message represents the request. The second base station sends the offset of the handover trigger parameter of the second cell caused by MLB.

13. The method according to claim 11, wherein if the reason for adjusting the switching trigger parameter contained in the first request message is the reason related to MRO, then

The first request message indicates a request for the second base station to send the offset of the handover trigger parameter of the second cell due to MRO, or,

The first request message indicates a request for the second base station to send the sum of the offsets of the handover trigger parameters of the second cell that are caused by MRO and MLB.

14. A base station, characterized in that, the base station is used to control the first cell, the base station includes: a first sending unit, used to send a first request message to an adjacent base station, the first request message is used to Requesting the neighboring base station to send a first offset of the handover trigger parameter of the second cell, where the first offset refers to the offset of the current value of the handover trigger parameter of the second cell relative to the default value , the adjacent base station is the control base station of the second cell, and the second cell is an adjacent cell of the first cell; and

The first receiving unit is configured to receive the first response message sent by the adjacent base station, where the first response message contains the first offset.

15. The base station according to claim 14, characterized in that, the first request message sent by the first sending unit includes: the cell identification of the first cell, the cell identification of the second cell and the Requesting the neighboring base station to send a request identifier of the first offset.

16. The base station according to claim 15, characterized in that the request identification includes an implicit identification or an explicit identification.

17. The base station according to claim 16, wherein the implicit identification includes: the base station recommends that the change value of the mobility parameter of the adjacent base station is 0; or,

The base station proposes a change value of the mobility parameter of the neighboring base station and a mobility parameter of the base station. The changed values of the numbers are all 0.

18. The base station according to any one of claims 14 to 17, characterized in that, the base station further includes: a judging unit, configured to judge the first offset according to the first offset received by the first receiving unit. Whether the handover trigger parameters of the second cell need to be adjusted; and

The second sending unit is configured to send a second request message to the adjacent base station when the judgment result of the judgment unit is that the handover trigger parameter of the second cell needs to be adjusted, and the second request message is used to request The neighboring base station adjusts the handover trigger parameter of the second cell.

19. The base station according to claim 18, characterized in that, the judgment unit further includes, a processing subunit, configured to obtain a second offset based on the first offset, the second offset A value indicating that the neighboring base station is recommended to adjust the handover triggering parameters of the second cell; and

Determine the subunit, if the second offset obtained by the processing subunit is not equal to 0, then determine that the handover trigger parameter of the second cell needs to be adjusted;

The second request message sent by the second sending unit is further used to request the neighboring base station to adjust the handover trigger parameter of the second cell according to the second offset.

20. The base station according to claim 19, characterized in that the processing subunit is further used to,

Calculate the first difference between the value recorded by the base station that the adjacent base station should adjust the handover trigger parameter of the second cell and the first offset received by the first receiving unit, and The first difference serves as the second offset; or,

Calculate the second difference between the value that the base station expects the neighboring base station to adjust the handover trigger parameter of the second cell and the first offset received by the first receiving unit, and calculate the second difference The difference is used as the second offset; or,

The negative value of the first offset is used as the second offset.

21. The base station according to any one of claims 18 to 20, characterized in that, the base station further includes: a second receiving unit, configured to receive a second response message sent by the adjacent base station, the second response The message indicates whether the adjacent base station has successfully adjusted the handover triggering parameters of the second cell or failed.

22. The base station according to any one of claims 14-21, characterized in that the first request message sent by the first sending unit also contains the reason for adjusting the handover trigger parameter.

23. The base station according to claim 22, wherein the first offset included in the first response message received by the first receiving unit is an offset corresponding to the cause.

24. The base station according to claim 22 or 23, wherein the reasons for adjusting the handover trigger parameters include: reasons related to mobility load balancing MLB or reasons related to mobility robust optimization MRO.

25. The base station according to claim 24, wherein if the reason for adjusting the switching trigger parameter contained in the first request message sent by the first sending unit is the MLB-related reason, then the The first request message indicates a request for the adjacent base station to send the offset of the handover trigger parameter of the second cell due to MLB.

26. The base station according to claim 24, characterized in that, if the reason for adjusting the handover trigger parameter contained in the first request message sent by the first sending unit is the reason related to MRO, then

The first request message indicates a request for the adjacent base station to send the offset of the handover trigger parameter of the second cell due to MRO, or,

The first request message indicates a request for the neighboring base station to send the sum of the offsets of the handover trigger parameters of the second cell caused by MRO and MLB.

27. A base station, characterized in that the base station includes a memory and a processor for executing the method according to any one of claims 1 to 26.

28. A communication system, characterized in that the communication system includes the base station according to any one of claims 14 to 26, and further includes an adjacent base station of the base station, and the adjacent base station is used to receive the information sent by the base station. a first request message, and sends a first response message to the base station, where the first response message contains a first offset of the handover trigger parameter of the second cell.