WO2014183575A1

WO2014183575A1 - Handover threshold processing method, apparatus, base station, rnc, and bsc

Info

Publication number: WO2014183575A1
Application number: PCT/CN2014/076881
Authority: WO
Inventors: 韩立锋
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-08-06
Filing date: 2014-05-06
Publication date: 2014-11-20
Also published as: CN104349416A

Abstract

The present invention provides a handover threshold processing method, apparatus, base station, radio network controller (RNC), and base station controller (BSC). The method comprises: a second network element receiving first handover threshold information sent by a first network element, the first handover threshold information comprising a first handover threshold for handover from a first cell of the first network element to a second cell of a second network element and/or a first threshold protection range of the first handover threshold; and the second network element determining second handover threshold information according to the first handover threshold information, the second handover threshold information comprising a second handover threshold for handover from the second cell to the first cell and/or a second threshold protection range of the second handover threshold. The present invention solves problems of resource waste and a decline in service quality and user experience that are caused by frequent handover failures during UE handover in the prior art, thereby achieving effects of reducing unnecessary handover, saving resources, and improving service quality of the UE.

Description

The present invention relates to the field of communications, and in particular to a handover threshold processing method, apparatus, base station, radio network controller (Radio Network Controller, RNC for short), and Base Station Controller (BSC). BACKGROUND OF THE INVENTION Long Term Evolution (LTE) network consists of an evolved Evolved Universal Terrestrial Radio Access Network (E-UTRAN) base station e B (Evolved NodeB) and an evolved packet switching center. (Evolved Packet Core, referred to as EPC), the network is flat. The E-UTRAN includes a set of eNBs connected to the EPC through the SI interface, and the eNBs can be connected through X2. Sl and X2 are logical interfaces. One EPC can manage one or more e Bs, one eNB can also be controlled by multiple EPCs, and one eNB can manage one or more cells. The Universal Mobile Telecommunication System (UMTS) network is composed of a radio network controller RNC and a NodeB and a core network (Core Network, referred to as CN), where the CN and the RNC are the IU port, the RNC and the nodeB. The interface between the RNC and the RNC is the Iur interface. Inter-system handover refers to a handover of a UE from one system to another, for example, from LTE to a UMTS system. The general inter-system handover procedure includes: the UE reports the measurement report to the node 1 of the source system (for example, system 1), and the node 1 decides to switch the UE to the cell 2 of the system 2 by the decision of the handover algorithm, and then the node 1 prepares through handover. The process and the management node 2 of the cell 2 of the system 2 perform a handover preparation process requesting allocation of resources for this UE. After the node 2 allocates the resource successfully, the node 1 sends a handover command to the UE, and the UE accesses the system 2 according to the handover command, and releases the connection with the system 2. Generally, the network side makes a handover decision based on a certain handover algorithm according to the signal quality of the local cell and the neighboring cell reported by the terminal, where the signal quality compared in the algorithm is the handover threshold. For example, in the case of unbalanced load between systems, load balancing needs to be performed between different cells, thereby improving the capacity and robustness of the entire network. One method is to modify the handover parameters between systems, so that the UE passes mobility. The handover action of the process moves between cells, for example, from a high load cell to a low load cell. Thereby achieving load balancing between systems. One of the problems is that after the handover parameters are modified, the successful handover is not always possible. When the handover parameters are not suitable, the ping-pong handover of the UE is also caused, which not only wastes the handover resources, but also causes the UE's Qos to decrease and decrease. The user experience. Therefore, the UE handover in the related art has frequent handover failures, which not only wastes resources, but also causes degradation of the quality of service of the UE and affects the user experience. SUMMARY OF THE INVENTION The present invention provides a handover threshold processing method, apparatus, base station, radio network controller RNC, and base station controller BSC, to at least solve the UE handover failure frequent handover failure in the related art, which not only wastes resources but also causes the UE to The quality of service is degraded, affecting the user experience. According to an aspect of the present invention, a handover threshold processing method is provided, including: receiving, by a second network element, first handover threshold information sent by a first network element, where the first handover threshold information includes the first network Switching to the first handover threshold of the second cell of the second network element and/or the first threshold protection range of the first handover threshold; the second network element according to the first handover The threshold information determines the second handover threshold information, where the second handover threshold information includes a second handover threshold of the second cell handover to the first cell and/or a second threshold protection of the second handover threshold range. Preferably, in a case that the first handover threshold information includes the first handover threshold and the first threshold protection range, the second network element determines the second handover according to the first handover threshold information. The threshold information includes: determining a constraint relationship that is satisfied between the first handover threshold, the first threshold protection range, and the second handover threshold; and determining the second handover threshold according to the constraint relationship. Preferably, the first handover threshold includes at least one of the following: a signal quality lower threshold M2 of the second cell measured by the terminal UE, and a signal quality upper threshold M1 of the first cell measured by the UE. a signal quality lower limit threshold M2 of the second cell, and a lower limit threshold M3 of a difference between a signal quality of the first cell and a signal quality of the second cell measured by the UE. Preferably, the first threshold protection range and the second threshold protection range are at least one of the following: a single value, a numerical value interval, and a maximum value and a minimum value. Preferably, the first switching threshold information and the second switching threshold information are expressed in the form of absolute values and/or relative values. Preferably, the first threshold protection range and the second threshold protection range are obtained according to at least one of the following information: historical handover information of the terminal UE, cell signal quality information measured by the UE, and ping-pong handover statistics of the UE. Information, handover failure rate of the UE, pre-configuration information of the node. Preferably, after the second network element determines the second handover threshold information according to the first handover threshold information, the method further includes: the second network element sending measurement configuration information to the terminal UE, where the measurement configuration information is The second switching threshold information is included in the middle. According to another aspect of the present invention, a switching threshold processing apparatus is provided, including: a receiving module, configured to receive, by a second network element, first switching threshold information sent by a first network element, where the first switching threshold information a first handover threshold of the second cell of the second network element and/or a first threshold protection range of the first handover threshold, where the first cell of the first network element is switched; Determining, by the second network element, the second handover threshold information according to the first handover threshold information, where the second handover threshold information includes a second handover threshold of the second cell switching to the first cell and/or The second threshold protection range of the second switching threshold. Preferably, the determining module includes: a first determining unit, configured to determine the first switching threshold if the first switching threshold information includes the first switching threshold and the first threshold protection range And a constraint relationship that is satisfied between the first threshold protection range and the second switching threshold. The second determining unit is configured to determine the second switching threshold according to the constraint relationship. Preferably, the device further includes: a sending module, configured to send the measurement configuration information that is sent by the second network element to the terminal UE, where the measurement configuration information includes the second switching threshold information. According to still another aspect of the present invention, a base station is provided, the base station comprising the apparatus of any of the above. According to still another aspect of the present invention, a radio network controller RNC is provided, the RNC comprising the apparatus of any of the above. According to still another aspect of the present invention, a base station controller BSC is provided, the BSC comprising the apparatus of any of the above. The first network switching element receives the first switching threshold information that is sent by the first network element, where the first switching threshold information includes that the first cell of the first network element is switched to the second network element. a first switching threshold of the second cell and/or a first threshold protection range of the first switching threshold; the second network element determining second switching threshold information according to the first switching threshold information, where The second handover threshold information includes that the second cell switches to the second handover threshold of the first cell and/or the second threshold protection range of the second handover threshold, which solves the problem that the handover of the UE is frequently performed in the related art. Failure, not only wasting resources, but also leading to the service of the UE The quality of the service is degraded, which affects the user experience, and thus achieves the effect of reducing unnecessary handover, saving resources, and improving the quality of service of the UE. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a flowchart of a handover threshold processing method according to an embodiment of the present invention; FIG. 2 is a structural block diagram of a handover threshold processing apparatus according to an embodiment of the present invention; FIG. 3 is a handover threshold according to an embodiment of the present invention. FIG. 4 is a block diagram showing a preferred structure of a handover threshold processing apparatus according to an embodiment of the present invention; FIG. 5 is a structural block diagram of a base station according to an embodiment of the present invention; FIG. 6 is a block diagram of a base station according to an embodiment of the present invention; FIG. 7 is a structural block diagram of a base station controller BSC according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a basic process of inter-system handover according to an embodiment of the present invention; Schematic diagram of the handover threshold protection range of the embodiment; FIG. 10 is a schematic diagram of the RIM message delivery handover threshold information according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. In this embodiment, a handover threshold processing method is provided. First, it should be noted that the first network element and the second network element may be multiple management network elements in the system, for example, may be LTE. The base station in the system, which may be the radio network controller RNC in the universal land-based radio access network UTRAN system, may also be the base station controller BSC in the mobile radiotelephone system GSM. FIG. 1 is a flowchart of a method for processing a handover threshold according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps: Step S102: The second network element receives the first handover threshold information that is sent by the first network element, where the first handover threshold information includes that the first cell of the first network element switches to the first of the second cell of the second network element. a first threshold protection range of the switching threshold and/or the first switching threshold; Step S104, the second network element determines the second switching threshold information according to the first switching threshold information, where the second switching threshold information includes the second cell switching to the The second switching threshold of a cell and/or the second threshold protection range of the second switching threshold. Through the above steps, the threshold information is exchanged between the network elements, so that the optimization threshold can be negotiated. Compared with the related art, after the handover threshold is modified, the modified handover threshold is not referenced between the network elements, and the handover threshold is changed when the handover is performed. Inappropriate, resulting in ping-pong switching, not only wastes resources, but also seriously affects the user experience. The interaction between the switching thresholds of the network elements is used to solve the problem that the UE fails to switch frequently and the service quality of the UE is degraded. Reduce unnecessary switching, save resources, and improve the user experience. Preferably, before the second network element receives the first handover threshold information sent by the first network element, the first network element may first modify the first handover threshold information, and the reason for the modification may be many, for example, according to the first cell and The load of the second cell is modified. The modification may be performed according to the modified configuration information sent by the network side. Of course, other modification reasons may also be included. The first network element notifies the second network element of the modified first handover threshold information, that is, the first handover threshold information received by the second network element is modified by the first network element. It should be noted that the manner of notification may be different according to specific situations, for example, the notification may be performed according to a predetermined period, or may be notified immediately upon modification. The second switching threshold determined by the second network element according to the first switching threshold information may also be different according to the information included in the first switching threshold information, for example, the first switching threshold information only includes the first switching threshold. In the case that the second network element can only determine the second switching threshold according to the first switching threshold; for example, in the case that the first switching threshold information includes the first switching threshold and the first threshold protection range, the second The network element may determine the second handover threshold information according to the first handover threshold information by: first, determining a constraint relationship that is satisfied between the first handover threshold, the first threshold protection scope, and the second handover threshold; determining the second according to the constraint relationship The switching threshold, the specific determination form is different depending on the selected parameters, and the following preferred embodiments may be referred to. It should be noted that, the foregoing first handover threshold may be expressed in multiple manners, for example, at least one of the following: a signal quality lower threshold M2 of the second cell measured by the terminal UE, and a signal of the first cell measured by the UE. a lower limit threshold M3 of the difference between the quality upper limit threshold M1 and the signal quality lower limit threshold M2 of the second cell, and the difference between the signal quality of the first cell and the signal quality of the second cell measured by the UE, where the above M1, M2, and M3 are used for The handover threshold for triggering whether the UE switches, for example, the handover threshold of cell1 to cell2, means that node 1 decides that the UE is from celll. When switching to cell2, the UE measures the minimum condition that the signal quality of cell1 and cell2 needs to be met. The switching threshold may be preset by the node 1, or may be obtained according to the switching statistics between the cell 1 and the cell 2, or may be obtained by the internal algorithm of the node 1. In addition, the first switching threshold information and the second switching threshold information may be in multiple expressions. For example, the expression may be in the form of an absolute value or a relative value. form. Furthermore, the first threshold protection range and the second threshold protection range may also be in various forms, for example, at least one of the following: a single value, a numerical value interval, and a maximum value and a minimum value. The first threshold protection range and the second threshold protection range may be obtained according to multiple types of information, for example, may be obtained according to at least one of the following information: historical handover information of the terminal UE, cell signal quality information measured by the UE, and ping-pong of the UE. Switching statistics, UE handover failure rate, and pre-configuration information of the node. Preferably, after the second network element determines the second handover threshold information according to the first handover threshold information, the method further includes: the second network element notifying the second handover threshold information to the UE, and correspondingly, the first network element may also The foregoing first handover threshold information is sent to the UE, and the notification may be performed in multiple manners, for example, by sending configuration information, for example, measurement configuration information sent by the second network element to the UE (for the difference, the measurement configuration information may be The second measurement configuration information includes the foregoing second handover threshold information, and correspondingly, the first network element may also send measurement configuration information to the terminal UE (also the measurement configuration information may also be The first measurement configuration information is included in the first measurement configuration information, and the first switching threshold information is included in the first measurement configuration information. In the embodiment, a switching threshold processing device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used hereinafter, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and conceivable. 2 is a block diagram showing the structure of a handover threshold processing apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes a receiving module 22 and a determining module 24. The system will be described below. The receiving module 22 is configured to receive, by the second network element, the first handover threshold information that is sent by the first network element, where the first handover threshold information includes that the first cell of the first network element is switched to the second cell of the second network element. The first switching threshold and/or the first threshold protection range of the first switching threshold; the determining module 24 is connected to the receiving module 22, and the second network element is configured to determine the second switching threshold information according to the first switching threshold information, where The second handover threshold information includes a second handover threshold of the second cell handover to the first cell and/or a second threshold protection range of the second handover threshold. 3 is a block diagram showing a preferred structure of the determining module 24 in the switching threshold processing apparatus according to the embodiment of the present invention. As shown in FIG. 3, the determining module 24 includes a first determining unit 32 and a second determining unit 34. Module 24 is described. The first determining unit 32 is configured to determine, when the first switching threshold information includes the first switching threshold and the first threshold protection range, the constraint that is met between the first switching threshold, the first threshold protection range, and the second switching threshold The second determining unit 34 is connected to the first determining unit 32, and is configured to determine the second switching threshold according to the constraint relationship. 4 is a block diagram showing a preferred structure of a switching threshold processing apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a transmitting module 42 in addition to all the structures shown in FIG. Description. The sending module 42 is configured to be used by the second network element to send measurement configuration information to the UE, where the measurement configuration information includes second switching threshold information. FIG. 5 is a structural block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 5, the base station 50 includes the handover threshold processing device 52 of any of the above. FIG. 6 is a structural block diagram of a radio network controller RNC according to an embodiment of the present invention. As shown in FIG. 6, the radio network controller RNC 60 includes the handover threshold processing device 52 of any of the above. FIG. 7 is a structural block diagram of a base station controller BSC according to an embodiment of the present invention. As shown in FIG. 7, the base station controller BSC 70 includes the handover threshold processing device 52 of any of the above. In the related art, when a system changes to a handover threshold of a different system, the handover threshold of the different system to the system is not referred to, and the handover threshold between the cells is inappropriate, thereby causing the ping-pong handover of the UE, that is, The UE may switch frequently between systems, or cause unnecessary handover. After the UE switches from cell1 to cell2, the signal quality of celll is still good enough, causing waste of resources of the target cell cell2, and the frequent handover process may cause the UE to The Qos is lowered, which reduces the problem of the user experience. In this embodiment, a method for optimizing the handover threshold between systems is provided to solve the ping-pong handover or unnecessary handover due to the adjustment of the handover parameters between the systems. The method for optimizing the switching threshold of the system includes: the network element 1 notifies the switching threshold of the modified cell1 to cell2 to the management network element 2 of the cell 2, and the management network element 2 optimizes the cell 2 to the celll according to the updated switching threshold of cell1 to cell2. Switch the threshold. The switching threshold of cell1 to cell2 may be expressed as at least one of the following: the signal quality of cell2 is greater than the threshold M2, the signal quality of cell2 is greater than the threshold M2, and the signal quality of cell1 is lower than the threshold M1, the signal quality of cell2 and the signal of cell1 The quality difference is greater than the threshold M3. Preferably, in order to prevent ping-pong switching caused by signal jitter, each switching threshold may also have a protection range H. The management network element 2 optimizes the switching threshold of cell2 to cell1 according to the updated handover threshold of cell1 to cell2 and the corresponding protection range H. The protection range may also be in various forms. For example, it may be a value, may be a value interval, or may include a minimum value and a maximum value. It should be noted that the switching threshold information may be transmitted between the network element 1 and the network element 2 through various messages. For example, the switching threshold information may be delivered through a dedicated message or a message that reuses the handover procedure. After the management network element 1 and the management network element 2 modify the switching threshold, the measurement configuration of the response can be modified and sent to the UE. In the measurement configuration, the threshold of the measurement event trigger can be modified. Through the foregoing embodiment and the preferred embodiment, the threshold information can be switched between the network element 1 and the network element 2, so that the optimized switching threshold can be negotiated and modified, and the ping-pong switching and unnecessary switching can be reduced. Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. The preferred embodiment is as follows: The switching threshold information of the system is transmitted, and the absolute value is used. The cell1 of the node 1 and the cell 2 of the node 2 are inter-system neighboring cells, the load of the celll is relatively high, and the load of the cell2 is relatively low, so as to improve the system capacity. The node 1 decides to trigger the UE to move to reduce the load of the celll by modifying the handover threshold, so that the partial cell load can be balanced to the cell 2, wherein the handover threshold of the UE 1 to trigger the handover in the handover algorithm of the node 1 is that the UE can be triggered from the celll. Switch to the condition of cell2. The switching condition may be: the signal quality of the cell2 measured by the UE in the cell1 is greater than the threshold M2, or the signal quality of the cell2 is greater than the threshold M2 and the signal quality of the celll is lower than the threshold M1, and the signal quality of the cell2 is poor compared to the signal quality of the cell1. Greater than the threshold M3. The switching threshold may include one or more of the above three thresholds. The switching threshold of the cell1 to the cell2 is the lowest condition that the signal quality of the celll and the cell2 measured by the UE is to be met when the node 1 determines that the UE switches from the cell1 to the cell2. The switching threshold may be preset by the node 1, or may be obtained according to the switching statistics between the cell 1 and the cell 2, or may be obtained by the internal algorithm of the node 1. The above three switching thresholds are respectively described below. Assuming that the switching algorithm module in cell1 uses the condition that the signal quality of cell2 is greater than the threshold M2 as the threshold of handover, node 1 can lower the switching threshold of cell1 to cell2 by lowering the value of M2, then there will be a greater number of cells in celll. The UE and the cell2 boundary, the measured cell2 signal quality meets the modification. After the handover threshold, node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. FIG. 8 is a schematic diagram of a basic process of inter-system handover according to an embodiment of the present invention. As shown in FIG. 8, the handover includes the following steps: Step S802, the UE sends a measurement report to the node 1; Step S804, the node 1 sends a handover request to the node 2. Step S806, the node 2 feeds back the handover response to the node 1; in step S808, the node 1 sends a handover command to the UE; in step S810, the UE feeds back the handover completion to the node 2. If the switching threshold used in celll is that the signal quality of cell2 is greater than the threshold M2 and the signal quality of celll is lower than the threshold M1, the value of M2 may be lowered or the value of M1 may be increased, or the value of M2 may be decreased and the value of M1 may be raised. Then, a greater number of UE measurements at the cell1 and cell2 boundaries satisfy the condition of switching to cell2, so that node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. If the signal quality of the switching threshold cell2 used in cell1 is greater than the threshold M3 of the celll, then node 1 can reduce the value of M3, and then there are more numbers of UE measurements at the celll and cell2 boundaries. Switching to the condition of cell2, so that node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. Node 1 notifies node 2 of the changed handover threshold information of cell1 to cell2, and the content of the handover threshold information includes: Threshold M2: The signal quality of the neighboring cell is greater than the threshold M2 triggering handover, the threshold M2 and the threshold Ml: the signal of the neighboring zone The quality is greater than the threshold M2 and the signal quality of the cell is lower than the threshold M1 to trigger the handover. The threshold M3 is: the difference between the signal quality of the neighboring cell and the signal quality of the cell is greater than the threshold M3 triggering handover, one or more of the three thresholds. It should be noted that, for each threshold, a threshold protection range may also be included, and the threshold protection range is a reference provided to the peer node as a setting switching threshold. The threshold protection range may be given by the node 1 according to the historical handover information of the UE, the cell signal quality measured by the UE, the handover behavior statistics of the UE, or the like, or obtained by pre-configuration. The node 2 receives the handover threshold information of the cell 1 to the cell 2, and according to the protection threshold of the handover threshold and the threshold included therein, the approximate range of the handover threshold of the cell 2 to the cell 1 can be determined to avoid the occurrence of the ping-pong handover. For example, the switching thresholds of cell1 to cell2 and cell2 to cell1 are all ones of the signal quality of the cell 2 in the same cell. Measure, then the difference between the switching thresholds at both ends needs to be greater than this threshold protection range to prevent ping-pong switching. The following is an example. For example, the switching threshold of cell l to cell 2 is that the signal quality of cell 2 is higher than X, the protection range is Z, and one of the switching threshold conditions of cell 2 to cell l is that the signal quality of cell 2 is lower than Y, then the value is less than (Χ- Ζ). Therefore, when the node 2 optimizes the adjustment threshold, it needs to consider the value of the switching threshold X and the protection range Z of the cell l to the cell 2 and the constraint relationship. If the switching threshold of cell 1 to cell 2 is that the signal quality difference between cell 2 and cell l is higher than X, the protection range is Z, and the switching threshold condition of cell 2 to cell l is that the signal quality difference between cell l and cell 2 is higher than Y, and needs to be satisfied ( Χ-Ζ ) +Υ>0; can guarantee that no ping-pong switching will occur. FIG. 9 is a schematic diagram of a handover threshold protection range according to an embodiment of the present invention, as shown in FIG. 9. Correspondingly, the switching threshold of cell 2 to cell l in node 2 may also be internally set with a threshold protection range Z ', and node 2 may combine the two thresholds to obtain a unique threshold protection range, for example, a maximum value may be selected. , or minimum, or other processing options. For example, according to the protection range Z given by the cell l and the protection range Z' of the cell 2 to the cell l set inside the node 2, the maximum value of the two is taken as the value Z '' used for the final decision, and then it needs to be satisfied (Χ -Ζ '' ) +Υ>0; to ensure that no ping-pong switching will occur. It should be noted that the above protection range may be a value, or a value interval, or a minimum value and a maximum value. For example, Ζ can take the value 2db, or an interval [2, 4], or only the maximum and minimum values {2, 3 } ₀ can be used when transmitting the switching threshold and protection range before node 1 and node 2. In this way, for example, node 1 can notify node 2 by message 1 between two nodes. The message 1 may be a handover request message, may be a message such as a handover response message, or may be transmitted by using other messages between systems, for example, a radio access network (Radio Access Network, RAN for short) message management (RAN Information) Management, abbreviated as RIM) message, FIG. 10 is a schematic diagram of using RIM message delivery handover threshold information according to an embodiment of the present invention. As shown in FIG. 10, the RIM message sent by node 1 to node 2 and node 2 send RIM to node 1. The message includes a handover threshold and/or a corresponding handover threshold protection range. It should be noted that, in the above message 1, the identification information including the cell 1 and the cell 2 is required. After receiving the message including the handover threshold information, the node 2 may adjust the handover threshold of the cell 2 to the cell 1 according to the protection threshold information of the handover threshold and/or the threshold to prevent the ping-pong switch. Preferably, the node 2 can also notify the node 1 of the modified cell2 to the threshold of the cell l, and can also include the corresponding protection range of the threshold. If the switching threshold of the switching thresholds cell2 to cell1 meets the switching protection range, or other reasons, the node 2 determines that the switching threshold of the cell2 to the cell1 is not modified, and the message may not be sent to the node 1. The node 1 may also modify the handover threshold of the cells of the plurality of jurisdictions to the node 2 at one time, and notify the handover node 2 of the handover threshold information of the multiple cells. The node 2 can modify the measurement control configuration to the UE according to the modified handover threshold, and can modify the trigger threshold of the measurement event, for example, the UMTS system, the 3A and 3C event thresholds, and the B1 and B2 event thresholds in the LTE system. Preferred Embodiment 2: Transmitting the switching threshold information between systems, using a relative value form: Cell1 of node 1 and cell 2 of node 2 are inter-system neighboring cells, the load of celll is relatively high, and the load of cell2 is relatively low, so as to improve system capacity. The node 1 decides to trigger the UE to move to reduce the load of the celll by modifying the handover threshold, so that the partial cell load can be balanced to the cell 2, wherein the handover threshold of the handover algorithm in the handover algorithm of the node 1 triggers the UE to trigger the UE from the celll. Switch to the condition of cell2. The switching condition may be: the signal quality of the cell 2 measured by the UE in the cell1 is greater than the threshold M2, the signal quality of the cell 2 is greater than the threshold M2, and the signal quality of the celll is lower than the threshold M1, and the signal quality of the cell 2 and the signal quality of the celll are greater than the threshold M3. . The switching threshold may include one or more of the above three thresholds. The switching threshold of the cell1 to the cell2 is the lowest condition that the signal quality of the cell1 and the cell2 measured by the UE is to be met when the node 1 determines that the UE switches from the cell1 to the cell2. The switching threshold may be preset by the node 1, or may be obtained according to the switching statistics between the cell1 and the cell2, or may be obtained by the internal algorithm of the node 1. The following is an example. Assuming that the switching algorithm module in cell1 uses the condition that the signal quality of cell2 is greater than the threshold M2 as the threshold of handover, node 1 can lower the switching threshold of cell1 to cell2 by lowering the value of M2, then there will be a greater number of cells in celll. The measured cell 2 signal quality of the UE that meets the cell 2 meets the modified handover threshold. Therefore, the node 1 can trigger more UEs to switch to the cell 2 according to the handover algorithm, thereby reducing the cell load of the cell 1. If the switching threshold used in celll is that the signal quality of cell2 is greater than the threshold M2 and the signal quality of celll is lower than the threshold M1, the value of M2 may be lowered or the value of M1 may be increased, or the value of M2 may be decreased and the value of M1 may be raised. Then, a greater number of UE measurements at the cell1 and cell2 boundaries satisfy the condition of switching to cell2, so that node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. If the signal quality of the switching threshold cell2 used in cell1 is greater than the threshold M3 of the celll, then node 1 can reduce the value of M3, and then there are more numbers of UE measurements at the celll and cell2 boundaries. Switching to the condition of cell2, so that node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. The node 1 notifies the switching threshold information of the modified cell1 to the cell 2 to the node 2, and the content of the switching threshold information includes: the switching threshold change amount, the switching threshold is: the threshold M2: the signal quality of the neighboring cell is greater than the threshold M2 triggering the switching Threshold M2 and threshold M1: The signal quality of the neighboring cell is greater than the threshold M2 and the signal quality of the cell is lower than the threshold M1 to trigger the handover. The threshold M3: the signal quality of the neighboring cell and the signal quality of the cell are greater than the threshold M3 triggering switching, One or more of the thresholds. The amount of change refers to the amount of change from the original threshold. Preferably, for each threshold, a threshold protection range may also be included, and the threshold protection range is a reference provided to the peer node as a setting switching threshold. The threshold protection range may be given by the node 1 according to the historical handover information of the UE, the cell signal quality measured by the UE, the handover behavior statistics of the UE, or the like, or obtained by pre-configuration. The node 2 receives the handover threshold information of the cell 1 to the cell 2, and according to the change amount of the handover threshold and the protection range of the threshold, the approximate range of the handover threshold of the cell 2 to the cell 1 can be determined to avoid the occurrence of the ping-pong handover. For example, the switching thresholds of cell1 to cell2 and cell2 to cell1 are all metrics for the signal quality of the same cell, and the difference between the switching thresholds of the two ends needs to be greater than the threshold protection range to prevent ping-pong switching. For example, the switching threshold of cell1 to cell2 is that the signal quality of cell2 is higher than X, the protection range is Z, and one of the switching threshold conditions of cell2 to celll is that the signal quality of cell2 is lower than Y, then the value is less than (Χ-Ζ). . Therefore, when the node 2 optimizes the adjustment threshold, it needs to consider the value of the switching threshold X and the protection range Z of cell1 to cell2 and the constraint relationship. If the switching threshold of cell1 to cell2 is that the signal quality difference between cell2 and cell1 is higher than X, the protection range is Z, and the switching threshold condition of cell2 to celll is that the signal quality difference between cell1 and cell2 is higher than Y, and needs to be satisfied (Χ-Ζ) +Υ>0; can guarantee that no ping-pong switching will occur. As shown in Figure 9 above. Preferably, the switching threshold of cell 2 to cell 1 in node 2 may also be internally set with a threshold protection range Z', and node 2 may combine the two thresholds to obtain a unique threshold protection range, for example, a maximum value may be selected. , or minimum, or other processing options. For example, according to the protection range Z given by cell1 and the protection range Z' of cell2 to celll set in node 2, the maximum value of the two is taken as the value Z'' used in the final decision, and then it needs to be satisfied (Χ-Ζ) '') +Υ>0; can guarantee that no ping-pong switching will occur. It should be noted that the protection range can be a value, or a value interval, or a minimum Value and maximum value. For example, Z can take the value 2db, or an interval [2, 4], or only the maximum and minimum values {2, 3}. When the handover threshold and the protection range are transmitted before the node 1 and the node 2, various methods can be employed. For example, the node 1 can notify the node 2 by the message 1 between the two nodes. The message 1 may be a handover request message, a handover response message, or the like. It can also be delivered using a dedicated message between systems, for example, a RIM message, as shown in FIG. In the above message 1, identification information including cell1 and cell2 is required. After receiving the message including the handover threshold information, the node 2 may adjust the handover threshold of cell2 to cell1 according to the change information of the handover threshold and/or the protection scope information of the threshold to prevent ping-pong handover. Preferably, the node 2 can also notify the node 1 of the threshold change of cell2 to cell1, and can also include the corresponding protection range of the threshold. It should be noted that, if the switching threshold of the switching thresholds cell1 to cell2 meets the switching protection range, the node

2 According to the actual, there is no need to modify the switching threshold. It is possible to notify the peer node 1 without notification. Preferably, the node 1 can also modify the handover threshold of the cells of the multiple jurisdictions to the node 2 at one time, and notify the opposite node 2 of the handover threshold information of the multiple cells. The node 2 can modify the measurement control configuration to the UE according to the modified handover threshold, and can modify the trigger threshold of the measurement event, for example, the UMTS system, the 3A and 3C event thresholds, and the B1 and B2 event thresholds in the LTE system. Preferred Embodiment 3: The information about the protection range between the transmission systems: The cell 1 of the node 1 and the cell 2 of the node 2 are inter-system neighboring cells, the load of the celll is relatively high, and the load of the cell 2 is relatively low. To improve the system capacity, the node 1 decides to pass The handover threshold is modified to trigger the UE to reduce the load of the cell1, so that the partial cell load can be balanced to the cell 2. The handover threshold for triggering the UE to switch in the handover algorithm in the node 1 refers to the condition for triggering the UE to switch from the cell1 to the cell 2. The handover condition may be: in the cell signal quality measured by the UE, the signal quality of the cell2 is greater than the threshold M2, the signal quality of the cell2 is greater than the threshold M2, and the signal quality of the celll is lower than the threshold M1, and the signal quality of the cell2 and the signal quality of the celll are greater than the threshold. M3. Contains one or more of the above three thresholds. The switching threshold of the cell1 to the cell2 is the lowest condition that the signal quality of the cell1 and the cell2 measured by the UE is to be met when the node 1 determines that the UE switches from the cell1 to the cell2. The switching threshold may be preset by the node 1, or may be obtained according to the switching statistics between the cell 1 and the cell 2, or may be obtained by the internal algorithm of the node 1. The following is an example. Assuming that the switching algorithm module in cell1 uses the condition that the signal quality of cell2 is greater than the threshold M2 as the threshold of handover, node 1 can lower the switching threshold of cell1 to cell2 by lowering the value of M2, then there will be a greater number of cells in celll. The measured cell 2 signal quality of the UE that meets the cell 2 meets the modified handover threshold. Therefore, the node 1 can trigger more UEs to switch to the cell 2 according to the handover algorithm, thereby reducing the cell load of the cell 1. The switching process is shown in Figure 8. If the switching threshold used in celll is that the signal quality of cell2 is greater than the threshold M2 and the signal quality of celll is lower than the threshold M1, the value of M2 may be lowered or the value of M1 may be increased, or the value of M2 may be decreased and the value of M1 may be raised. Then, a greater number of UE measurements at the cell1 and cell2 boundaries satisfy the condition of switching to cell2, so that node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. If the signal quality of the switching threshold cell2 used in cell1 is greater than the threshold M3 of the celll, then node 1 can reduce the value of M3, and then there are more numbers of UE measurements at the celll and cell2 boundaries. Switching to the condition of cell2, so that node 1 can trigger more UEs to switch to cell2 according to the handover algorithm, thereby reducing the cell load of cell1. For each threshold, a threshold protection range may also be included, and the threshold protection range is a reference provided to the peer node as a setting switching threshold. The threshold protection range may be given by the node 1 according to the historical information of the UE, the cell signal quality measured by the UE, the handover failure rate, the number of ping-pong handovers, and the like, or obtained by pre-configuration. Based on the above statistical information, the node 1 determines whether the threshold protection range needs to be modified by the algorithm. If the node 1 needs to modify the protection range of the corresponding threshold by the algorithm, the node 1 notifies the node 2 of the changed threshold protection range information of the changed cell1 to cell2, and the content of the handover threshold protection range information includes: The amount of change in the value or threshold protection range based on the original value. Preferably, the specific threshold information, that is, the switching threshold or the threshold type corresponding to the protection range, may also be included. The switching threshold includes: Threshold M2: The signal quality of the neighboring area is greater than the threshold M2 triggering switching, the threshold M2 and the threshold M1: the signal quality of the neighboring area is greater than the threshold M2 and the signal quality of the local cell is lower than the threshold M1 triggering the switching, the threshold M3: the neighboring area The signal quality is different from the signal quality of the cell than the threshold M3 triggering switching, one or more of the three thresholds. The threshold type can be expressed as a signal quality threshold for the neighbor, a signal quality threshold for the cell, and a threshold for poor signal quality for the neighbor and the cell. The node 2 receives the handover threshold protection range information of the cell 1 to the cell 2, and according to the protection range and/or the handover threshold of the threshold included therein, the approximate range of the handover threshold of the cell 2 to the cell 1 can be determined to avoid the occurrence of the ping-pong handover. For example, the switching thresholds of cell1 to cell2 and cell2 to cell1 are all the same cell 2 A measure of the quality of the number, then the difference between the switching thresholds at both ends needs to be greater than this threshold protection range to prevent ping-pong switching. For example, the switching threshold of cell l to cell 2 is that the signal quality of cell 2 is higher than X, the protection range is Z, and one of the switching threshold conditions of cell 2 to cell l is that the signal quality of cell 2 is lower than Y, then the value is less than (Χ- Ζ). Therefore, when the node 2 optimizes the adjustment threshold, it needs to consider the value of the switching threshold X and the protection range Z of the cell l to the cell 2 and the constraint relationship. If the switching threshold of cell 1 to cell 2 is that the signal quality difference between cell 2 and cell l is higher than X, the protection range is Z, and the switching threshold condition of cell 2 to cell l is that the signal quality difference between cell l and cell 2 is higher than Y, and needs to be satisfied ( Χ-Ζ ) +Υ>0; can guarantee that no ping-pong switching will occur. As shown in Figure 9. The switching threshold of cell 2 to cell l in node 2 may also be internally set with a threshold protection range Z ', and node 2 may combine the two thresholds to obtain a unique threshold protection range, for example, a maximum value or a minimum may be selected. Value, or other processing scheme. For example, according to the protection range Z given by the cell l and the protection range Z' of the cell 2 to the cell l set inside the node 2, the maximum value of the two is taken as the value Z " for the final decision, and then it needs to be satisfied (Χ- Ζ '' ) +Υ>0; can guarantee that no ping-pong switching will occur. It should be noted that the above protection range can be a value, or a value interval, or a minimum and maximum value. For example, Ζ can take the value 2db, or an interval [2, 4], or only the maximum and minimum values {2, 3 } _0. When transmitting the switching threshold and protection range before node 1 and node 2, there are many ways. For example, the node 1 can notify the node 2 through the message 1 between the two nodes. The message 1 can be a handover request message, a handover response message, etc. It can also be transmitted by using a dedicated message between systems, for example, The RIM message is as shown in Figure 10. In the above message 1, the identification information of the cell 1 and the cell 2 is required. After receiving the message including the handover threshold information, the node 2 may The threshold change information and/or the protection range information of the threshold adjust the switching threshold of cell 2 to cell l to prevent ping-pong switching. Preferably, node 2 can also notify node 1 of the cell 2 to cell l threshold change amount, and Preferably, if the switching threshold of the switching threshold cell l to cell 2 meets the switching protection range, the node 2 does not need to modify the switching threshold according to the actual situation. It is not necessary to notify the opposite node 1 . The node 1 may also modify the handover threshold of the cells of the plurality of jurisdictions to the node 2 at one time, and notify the handover node 2 of the handover threshold information of the multiple cells. The node 2 can modify the measurement control configuration to the UE according to the modified handover threshold, and can modify the trigger threshold of the measurement event, for example, the UMTS system, the 3A and 3C event thresholds, and the B1 and B2 event thresholds in the LTE system. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. 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. Industrial Applicability As described above, a handover threshold processing method, apparatus, base station, radio network controller RNC, and base station controller BSC provided by the embodiments of the present invention have the following beneficial effects: The UE handover in the related art is frequently switched. Failure, not only wastes resources, but also causes the quality of the UE to degrade, affecting the user experience, and thus achieves the effect of reducing unnecessary handover, saving resources, and improving the quality of service of the UE.

Claims

Claim

A handover threshold processing method, including:

The second network element receives the first handover threshold information that is sent by the first network element, where the first handover threshold information includes that the first cell of the first network element is switched to the second cell of the second network element. a first switching threshold and/or a first threshold protection range of the first switching threshold;

Determining, by the second network element, the second handover threshold information according to the first handover threshold information, where the second handover threshold information includes a second handover threshold of the second cell to the first cell and/or Or a second threshold protection range of the second switching threshold.

The method according to claim 1, wherein, in a case that the first handover threshold information includes the first handover threshold and the first threshold protection range, the second network element is according to the first Determining, by the switching threshold information, the second switching threshold information includes:

Determining a constraint relationship that is satisfied between the first switching threshold, the first threshold protection range, and the second switching threshold;

Determining the second switching threshold according to the constraint relationship.

The method according to claim 1, wherein the first handover threshold comprises at least one of: a signal quality lower threshold M2 of the second cell measured by the terminal UE, and the measured by the UE a signal quality upper limit threshold M1 of the first cell and a signal quality lower limit threshold M2 of the second cell, and a lower threshold of a difference between a signal quality of the first cell and a signal quality of the second cell measured by the UE M3.

The method according to claim 1, wherein the first threshold protection range and the second threshold protection range are at least one of the following:

A single value, a range of values, a maximum and a minimum.

The method according to claim 1, wherein the first switching threshold information and the second switching threshold information are expressed in the form of absolute values and/or relative values.

The method according to claim 1, wherein the first threshold protection range and the second threshold protection range are obtained according to at least one of the following information: The historical handover information of the terminal UE, the cell signal quality information measured by the UE, the ping-pong handover statistics of the UE, the handover failure rate of the UE, and pre-configuration information of the node.

The method according to any one of claims 1 to 6, wherein after the second network element determines the second handover threshold information according to the first handover threshold information, the method further includes:

The second network element sends measurement configuration information to the terminal UE, where the measurement configuration information includes the second handover threshold information.

8. A switching threshold processing apparatus, comprising:

The receiving module is configured to receive, by the second network element, the first handover threshold information that is sent by the first network element, where the first handover threshold information includes that the first cell of the first network element is switched to the second network element a first switching threshold of the second cell and/or a first threshold protection range of the first switching threshold;

a determining module, configured to determine, by the second network element, the second handover threshold information according to the first handover threshold information, where the second handover threshold information includes that the second cell switches to the first cell And a second threshold protection range of the second switching threshold and/or the second switching threshold.

The device according to claim 8, wherein the determining module comprises: a first determining unit, configured to: when the first switching threshold information includes the first switching threshold and the first threshold protection range In the case, determining a constraint relationship that is satisfied between the first switching threshold, the first threshold protection range, and the second switching threshold;

And a second determining unit, configured to determine the second switching threshold according to the constraint relationship.

The apparatus according to any one of claims 8 to 9, further comprising:

The sending module is configured to send, by the second network element, measurement configuration information to the terminal UE, where the measurement configuration information includes the second handover threshold information.

A base station comprising the apparatus of any one of claims 8 to 10.

A radio network controller RNC comprising the apparatus of any one of claims 8 to 10.

A base station controller BSC comprising the apparatus of any one of claims 8 to 10.