WO2013000235A1 - 一种终端切换的方法及装置 - Google Patents
一种终端切换的方法及装置 Download PDFInfo
- Publication number
- WO2013000235A1 WO2013000235A1 PCT/CN2011/082604 CN2011082604W WO2013000235A1 WO 2013000235 A1 WO2013000235 A1 WO 2013000235A1 CN 2011082604 W CN2011082604 W CN 2011082604W WO 2013000235 A1 WO2013000235 A1 WO 2013000235A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- handover
- reported
- determining
- measurement event
- threshold
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
Definitions
- the present invention relates to the field of mobile communications, and in particular, to a method and an apparatus for terminal handover. Background technique
- LTE Long Term Evolution
- UE assistance In order to achieve seamless handover, it is necessary to minimize the interruption time and avoid data loss.
- the switching process is as follows:
- the UE User Equipment, User Terminal, Terminal
- the evolved NodeB evolved NodeB, eNB for short.
- the source eNodeB determines the handover target cell based on the measurement report and the RRM (Radio Resource Management) algorithm, and sends the UE context information (Ue Context) along with the handover request to the eNodeB of the handover target cell;
- RRM Radio Resource Management
- the target eNodeB forwards the C-RNTK cell radio network temporary identifier pre-assigned to the handover UE and other parameters (access parameters, SIB (system information block), etc.) to the source eNodeB in a context confirmation message.
- the source eNodeB forwards the data packet to the target eNodeB, and the source eNodeB sends a handover command (HandOver Command) to the UE.
- the UE receives the handover command, according to the target cell identifier carried in the handover command, from the source.
- the cell is detached and establishes uplink synchronization with the target eNB;
- the target eNodeB returns a TA (time advance) and indicates the allocated resource location to the UE, and the UE returns a HandOver Comfirm message to the target eNodeB.
- TA time advance
- the target eNodeB indicates to the source eNodeB that the handover is complete, and the source eNodeB clears the data that has been forwarded to the target eNodeB.
- the technical problem to be solved by the present invention is to provide a method and apparatus for terminal handover to avoid service interruption of the terminal.
- the present invention provides a method for handover of a terminal, including: a source evolved base station (eNB), after determining that a user equipment (UE) needs to be handed over, determining, according to a measurement report reported by the UE, to the UE The number N of handover commands sent; during the handover of the UE, N handover commands are sent to the UE.
- eNB source evolved base station
- UE user equipment
- the determining, according to the measurement report reported by the UE, the number N of handover commands sent to the UE including:
- the determining, according to the measurement event reported by the UE, the number N of handover commands sent to the UE includes: determining, when the measurement event reported by the UE is A5, the number of handover commands sent to the UE N > 2.
- N 3.
- the determining, according to the measurement event reported by the UE and the signal quality of the current serving cell, the number N of handover commands sent to the UE including:
- the signal quality of the current serving cell includes: reference signal received power (RSRP) Or reference signal reception quality (RSRQ)
- the present invention further provides a device for terminal handover, which is located in an evolved base station (eNB), and includes a handover command number determining module and a handover command sending module, where: the handover command number determining module, And determining, after determining that the user equipment (UE) needs to be handed over, determining, according to the measurement report reported by the UE, the number N of handover commands sent to the UE;
- eNB evolved base station
- the handover command sending module is configured to send N handover commands to the UE during handover of the UE.
- the number of handover command determination modules is set to determine the number of handover commands sent to the UE according to the measurement report reported by the UE in the following manner:
- the handover command number determining module is configured to determine, according to the measurement event reported by the UE, the number N of handover commands sent to the UE in the following manner: when the measurement event reported by the UE is A5, the handover command The number determination module determines the number of handover commands N > 2 to be sent to the UE.
- N 3.
- the handover command number determining module is configured to determine, according to the measurement event reported by the UE and the signal quality of the current serving cell, the number N of handover commands sent to the UE in the following manner:
- N A is determined
- the signal quality of the current serving cell includes: reference signal received power (RSRP) or reference signal received quality (RSRQ).
- RSRP reference signal received power
- RSSQ reference signal received quality
- the method and the device of the present invention determine whether to issue multiple handover commands by determining the signal quality of the serving cell and the neighboring cell for the same handover, so as to ensure that the UE can receive the handover command in time.
- the handover success rate is increased, so that the UE synchronizes in the target cell as soon as possible, thereby reducing the handover delay and enhancing the user experience in the handover process.
- FIG. 1 is a flowchart of a handover command setting when a measurement event is an A3 event according to an embodiment of the present invention
- FIG. 2 is a flowchart of a handover command delivery process according to Embodiment 1 of the present invention
- FIG. 3 is a flowchart of setting a handover command when an event is measured as an A5 event according to Embodiment 3 of the present invention.
- the existing handover process analysis shows that after the source eNodeB sends a handover command to the UE, the UE at this time is usually at the cell edge, and the signal quality is poor. It is very likely that HARQ (Hybrid Automatic Retransmission) or RLC (Radio Link Control) will occur. The retransmission of the layer is prone to the phenomenon that the UE does not receive the handover command or receives the handover command too late.
- the target eNodeB has allocated resources to the UE when the LTE system handover is a handover. If the UE does not receive the handover command or receives the handover command too late, the UE cannot synchronize to the target cell. Interrupted.
- the source eNB determines the number N of handover commands sent to the UE according to the measurement report reported by the UE. In the handover process of the UE, the N handover commands are sent to the UE.
- N is a positive integer > 1.
- the RLC layer retransmission or the MAC layer HARQ retransmission occurs. If there is a new handover command, the new handover command may be more likely.
- the retransmission handover command is received by the UE earlier, so that the UE synchronizes in the target cell as soon as possible, thereby reducing the handover delay, avoiding service interruption, and enhancing the user experience in the handover process.
- the source eNB may determine, according to the measurement event reported by the UE, the number N of handover commands sent to the UE, or determine, according to the measurement event reported by the UE and the signal quality of the current serving cell, to the UE.
- the UE reports an A5 measurement event, and the A5 measurement event is defined as the serving cell signal is lower than a threshold, and the neighbor signal is higher than a threshold.
- the signal quality of the UE serving cell is poor, and the signal quality of the neighboring cell is good.
- the A3 measurement event is defined as the difference between the neighboring cell signal quality parameter and the serving cell signal quality parameter is greater than a threshold.
- the serving cell signal is not necessarily poor, and the number of sending handover commands is further determined according to the signal quality of the current serving cell reported by the UE. The principle is: if the serving cell signal is good, the handover command does not need to be sent multiple times. Otherwise, the switch command is issued multiple times. specifically:
- N A is determined
- the range of A is [3, 5]
- the range of B is [2, 3].
- RSRP Reference Signal Received Power
- the implementation can be implemented using the process shown in Figure 1, but it can also be implemented using other processes.
- RSRQ Reference Signal Reception Quality
- RSRP Reference Signal Reception Quality
- the apparatus located in the eNB that implements the foregoing method includes a handover command number determining module and a handover command sending module, where:
- the switching command number determining module is configured to determine, according to the measurement report reported by the UE, the number N of handover commands sent to the UE after determining that the UE needs to be handed over;
- the handover command sending module is configured to send N handover commands to the UE during the handover process of the UE.
- the handover command number determining module is configured to determine, according to the measurement report reported by the UE, the number N of handover commands sent to the UE in the following manner: determining, according to the measurement event reported by the UE, sending to the UE The number N of handover commands is determined, or the number N of handover commands sent to the UE is determined according to the measurement event reported by the UE and the signal quality of the current serving cell.
- the handover command number determining module is configured to determine, according to the measurement event reported by the UE and the signal quality of the current serving cell, the number N of handover commands sent to the UE in the following manner:
- N A is determined
- the measurement event reported by the UE is A3, and the signal quality of the current serving cell reported by the UE is small.
- N C;
- Step 110 The UE sends a measurement report to the eNodeB.
- Step 120 the eNodeB determines the handover target cell based on the measurement report and the RRM algorithm, and sends the context information of the UE along with the handover request to the eNodeB of the handover target cell;
- Step 130 the target eNodeB returns the C-RNTI and other parameters (access parameters, SIB, etc.) pre-assigned to the handover UE to the source eNodeB in the context confirmation message;
- Step 140 After receiving the context confirmation message, the source eNodeB forwards the data packet to the target eNodeB.
- Step 150 The source eNodeB determines that the measurement event in the UE measurement report is A3, and the RSRP value of the serving cell reported by the UE is greater than 100 dBm, and determines that the number of times the handover command is sent is three times; Step 160, the source eNodeB sends the number of transmissions according to the determined number of times.
- the UE sends a handover command.
- the source eNodeB can be implemented by using a timer in combination with a counter. For example, the source eNodeB can set the total number of handover command transmission counters (HoTime) to 3, and a handover command retransmission timing of a time length of Ts. , implemented by the process shown in Figure 2, including:
- Step a the source eNodeB sends a handover command to the UE, and the handover command sends a counter plus one;
- step b starts a handover command retransmission timer;
- Step c determining whether the handover command retransmission timer expires, if yes, executing step d, if not, returning to step c;
- Step d Determine whether the handover command transmission counter is equal to the total number of handover command transmission counters, and if yes, end, if not, return to the step.
- timer in combination with the counter in this embodiment is merely an example. In other embodiments, other known methods may be used.
- Step 170 The UE receives the handover command, starts the uplink synchronization process of the target eNodeB, and acquires the uplink TA from the target eNodeB.
- Step 190 the target eNodeB indicates to the source eNodeB that the handover is completed, and the source eNodeB clears the data that has been forwarded to the target eNodeB.
- Step 210 The UE sends a measurement report to the eNodeB.
- Step 220 The eNodeB determines the handover target cell based on the measurement report and the RRM algorithm, and sends the context information of the UE to the eNodeB of the handover target cell along with the handover request.
- Step 230 the target eNodeB returns the C-RNTI and other parameters (access parameters, SIB, etc.) pre-assigned to the handover UE to the source eNodeB in the context confirmation message;
- Step 240 after receiving the context confirmation message, the source eNodeB forwards the data packet to the target eNodeB.
- Step 250 The source eNodeB determines that the measurement event in the UE measurement report is A3, and the RSRP value of the serving cell reported by the UE is less than 90 dBm, and determines that the number of times the handover command is sent is one time; Step 260, the source eNodeB sends the number of transmissions according to the determined number of times. The UE sends a handover command.
- the source eNodeB determines that the measurement event in the UE measurement report is A3, and the RSRP value of the serving cell reported by the UE is less than 90 dBm, and determines that the number of times the handover command is sent is one time;
- Step 260 the source eNodeB sends the number of transmissions according to the determined number of times.
- the UE sends a handover command.
- Step 270 The UE receives the handover command, starts the uplink synchronization process of the target eNodeB, and acquires the uplink TA from the target eNodeB.
- Step 280 The target eNodeB returns a TA to the UE and indicates the allocated resource location to the UE.
- the UE returns a handover complete message to the target eNodeB;
- Step 290 the target eNodeB indicates to the source eNodeB that the handover is completed, and the source eNodeB clears the data that has been forwarded to the target eNodeB.
- Step 310 the UE sends a measurement report to the eNodeB.
- Step 320 the eNodeB determines the handover target cell based on the measurement report and the RRM algorithm, and The context information of the UE is sent along with the handover request to the eNodeB of the handover target cell;
- Step 330 the target eNodeB returns the C-RNTI and other parameters (access parameters, SIB, etc.) pre-assigned to the handover UE to the source eNodeB in the context confirmation message;
- Step 340 After receiving the context confirmation message, the source eNodeB forwards the data packet to the target eNodeB.
- Step 350 The source eNodeB determines that the measurement event in the UE measurement report is A5, and determines that the number of times the handover command is sent is three times;
- Step 360 The source eNodeB sends a handover command to the UE according to the determined number of transmissions. For details, refer to the description in Embodiment 1.
- Step 370 The UE receives the handover command, starts the uplink synchronization process of the target eNodeB, and acquires the uplink TA from the target eNodeB.
- Step 380 The target eNodeB returns a TA to the UE and indicates the allocated resource location to the UE, and the UE returns a handover complete message to the target eNodeB.
- Step 390 The target eNodeB indicates to the source eNodeB that the handover is completed, and the source eNodeB clears the data that has been forwarded to the target eNodeB.
- the foregoing technical solution provides a method and device for terminal handover, which avoids service interruption of the terminal.
- the method and the device determine, according to the signal quality of the serving cell and the neighboring cell, whether to issue multiple handover commands to ensure that the UE can receive the handover command in time and increase the handover success. Rate, enable the UE to synchronize in the target cell as soon as possible, thereby reducing the handover delay and enhancing the user experience during the handover process.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
本发明提供了一种终端切换的方法及装置,所述方法包括:源演进型基站(eNB)在确定用户设备(UE)需要切换后,根据所述UE上报的测量报告确定向所述UE发送的切换命令的个数N;在所述UE的切换过程中,向所述UE发送N个切换命令,N为正整数。所述方法和装置避免了终端的业务中断。
Description
一种终端切换的方法及装置
技术领域
本发明涉及移动通信领域, 具体涉及一种终端切换的方法及装置。 背景技术
LTE ( Long Term Evolution, 长期演进) ***釆用网络控制、 UE协助的 方式, 为了实现无损无缝切换, 需要尽量降低中断时间, 尽量避免数据损失。
切换流程如下:
1、 根据 RRC ( Radio Resource Control, 无线资源控制)重配消息规定的 测量上报准则, UE ( User Equipment, 用户终端, 简称终端)发送测量报告 ( Measurement Report ) 消息给演进 NodeB ( Evolved NodeB , 简称 eNB ) ;
2、 源 eNodeB基于测量报告和 RRM (无线资源管理)算法确定切换目 标小区, 并将 UE的上下文信息(Ue Context )随切换请求一起发送到切换目 标小区的 eNodeB;
3、目标 eNodeB将预分配给切换 UE的 C-RNTK小区无线网络临时标识 ) 和其他参数(接入参数、 SIB(***信息块)等)在上下文确认( Context Confirm ) 消息中返回给源 eNodeB , 源 eNodeB在收到上下文确认消息后, 将数据包转 发到目标 eNodeB, 源 eNodeB向 UE发送切换命令 ( HandOver Command ) ; 4、 UE收到切换命令, 根据切换命令中携带的目标小区标识, 从源小区 脱离并与目标 eNB建立上行同步;
5、 目标 eNodeB返回 TA (时间提前量)并向 UE指示分配的资源位置, UE向目标 eNodeB返回切换完成( HandOver Comfirm ) 消息;
6、 目标 eNodeB向源 eNodeB指示切换完成, 源 eNodeB清空已经被转 发到目标 eNodeB的数据。
但在实际运行过程中, 常常出现 UE收不到切换命令而导致业务中断的 情况。
发明内容
本发明要解决的技术问题是提供一种终端切换的方法及装置, 避免终端 的业务中断。 为解决上述技术问题, 本发明提供了一种终端切换的方法, 包括: 源演进型基站( eNB )在确定用户设备 ( UE )需要切换后, 根据所述 UE 上报的测量报告确定向所述 UE发送的切换命令的个数 N;在所述 UE的切换 过程中, 向所述 UE发送 N个切换命令。
优选地,所述根据所述 UE上报的测量报告确定向所述 UE发送的切换命 令的个数 N, 包括:
根据所述 UE上报的测量事件确定向所述 UE发送的切换命令的个数 N, 或者, 根据所述 UE上报的测量事件以及当前服务小区的信号质量确定向所 述 UE发送的切换命令的个数 N。
优选地,所述根据所述 UE上报的测量事件确定向所述 UE发送的切换命 令的个数 N, 包括: 当所述 UE上报的测量事件为 A5时, 确定向 UE发送的 切换命令个数 N > 2。
优选地, N=3。
优选地, 所述根据所述 UE上报的测量事件以及当前服务小区的信号质 量确定向所述 UE发送的切换命令的个数 N, 包括:
当所述 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质 量大于第一门限, 则确定 N=A; 或者
当所述 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质 量小于第一门限, 大于第二门限, 则确定 N=B; 或者
当所述 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质 量小于第二门限, 则确定 N=C;
其中第一门限〉第二门限〉第三门限, 所述 A > B > C > 1。
优选地,所述当前服务小区的信号质量包括:参考信号接收功率(RSRP )
或参考信号接收质量(RSRQ )
为解决上述技术问题, 本发明还提供了一种终端切换的装置, 位于演进 型基站(eNB ) , 包括切换命令个数确定模块和切换命令发送模块, 其中: 所述切换命令个数确定模块,设置为在确定用户设备(UE )需要切换后, 根据所述 UE上报的测量报告确定向所述 UE发送的切换命令的个数 N;
所述切换命令发送模块, 设置为在所述 UE 的切换过程中, 向所述 UE 发送 N个切换命令。
优选地, 所述切换命令个数确定模块是设置为釆用以下方式根据 UE上 报的测量报告确定向 UE发送的切换命令的个数 N:
根据所述 UE上报的测量事件确定向所述 UE发送的切换命令的个数 N, 或者, 根据所述 UE上报的测量事件以及当前服务小区的信号质量确定向所 述 UE发送的切换命令的个数 N。
优选地, 所述切换命令个数确定模块是设置为釆用以下方式根据 UE上 报的测量事件确定向 UE发送的切换命令的个数 N:当 UE上报的测量事件为 A5时, 所述切换命令个数确定模块确定向 UE发送的切换命令个数 N > 2。
优选地, N=3。
优选地, 所述切换命令个数确定模块是设置为釆用以下方式根据 UE上 报的测量事件以及当前服务小区的信号质量确定向 UE发送的切换命令的个 数 N:
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量大 于第一门限, 则确定 N=A; 或者
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量小 于第一门限, 大于第二门限, 则确定 N=B; 或者
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量小 于第二门限, 则确定 N=C;
其中第一门限〉第二门限〉第三门限, 所述 A > B > C > 1。
优选地,所述当前服务小区的信号质量包括:参考信号接收功率(RSRP ) 或参考信号接收质量(RSRQ ) 。
本发明实施例的方法和装置在现有技术的基础上, 针对同一次切换, 通 过判决服务小区与邻区的信号质量, 决定是否下发多个切换命令, 保证 UE 能够及时收到切换命令, 增加切换成功率, 使 UE尽快在目标小区同步, 从 而减小切换时延, 增强切换过程中的用户体验。 附图概述
图 1为本发明实施方式中测量事件为 A3事件时的切换命令设置流程图; 图 2为本发明实施例 1切换命令下发处理流程图;
图 3为本发明实施例 3测量事件为 A5事件时的切换命令设置流程图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
对现有切换流程分析发现, 源 eNodeB给 UE下发切换命令后, 这时的 UE通常处于小区边缘,信号质量较差,很有可能发生 HARQ (混合自动重传) 或者 RLC (无线链路控制)层的重传, 很容易出现 UE收不到切换命令或者 收到切换命令过晚的现象。 而由于 LTE***切换属于后切换, 给 UE发送切 换命令时, 目标 eNodeB已给 UE分配好资源, 如果 UE收不到切换命令或者 收到切换命令过晚, 就无法同步到目标小区, 从而导致业务中断。
针对现有技术的这种情况, 本实施例提出以下方案:
源 eNB在确定 UE需要切换后, 根据所述 UE上报的测量报告确定向所 述 UE发送的切换命令的个数 N; 在所述 UE的切换过程中, 向所述 UE发送 N个切换命令。 N为 > 1的正整数。
如果首个切换命令由于小区信号质量等原因发生了 RLC 层重传或者 MAC层 HARQ重传, 这时如果有新的切换命令, 新的切换命令就有可能比
重传的切换命令更早被 UE收到,使 UE尽快在目标小区同步,从而减小切换 时延, 避免业务中断, 增强切换过程中的用户体验。
优选地, 源 eNB可以根据所述 UE上报的测量事件确定向所述 UE发送 的切换命令的个数 N, 或者, 根据所述 UE上报的测量事件以及当前服务小 区的信号质量确定向所述 UE发送的切换命令的个数 N。
具体地, 例如: UE上报的是 A5测量事件, 而 A5测量事件定义为服务 小区信号低于一个门限, 邻区信号高于一个门限。 这时说明该 UE服务小区 信号质量差, 邻区信号质量好, 则确定向 UE发送的切换命令个数 N > 2, 优 选为 N=3 , 即下发 3次切换命令给 UE。
如果 UE上报的是 A3测量事件, 而 A3测量事件定义为邻区信号质量参 数与服务小区信号质量参数之差大于一个门限。 这时服务小区信号不一定很 差, 则进一步根据 UE上报的当前服务小区的信号质量来确定发送切换命令 的个数, 原则是: 如果服务小区信号很好, 切换命令就不需要多次发送, 否 则多次下发切换命令。 具体地:
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量大 于第一门限, 则确定 N=A; 或者
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量小 于第一门限大于第二门限, 则确定 N=B; 或者
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量小 于第二门限, 则确定 N=C;
其中第一门限〉第二门限〉第三门限, 所述 A > B > C > 1。 优选地 A的 取值范围为 [3,5] , B的取值范围为 [2,3]
以 RSRP (参考信号接收功率)作为当前服务小区的信号质量为例进行 举例说明:
如果 UE的 RSRP大于 lOOdBm,则该 UE可能位于小区边缘,确定 N=3; 如果 UE的 RSRP小于 lOOdBm但大于 90dBm,则该 UE可能位于小区中 心和小区边缘之间 , 确定 N=2;
如果 UE的 RSRP小于 90dBm, 则该 UE可能位于小区中心, 确定 N=l。
执行时可釆用如图 1所示流程实现, 但也可以釆用其他流程实现。
除了釆用 RSRP之外, 在其他实施例中还可釆用 RSRQ (参考信号接收 质量)来作为当前服务小区的信号质量。 釆用 RSRQ时所使用的第一、 第二、 第三门限值, 可参考 RSRP的门限值。
实现上述方法的位于 eNB的装置包括切换命令个数确定模块和切换命令 发送模块, 其中:
所述切换命令个数确定模块, 设置为在确定 UE需要切换后, 根据该 UE 上报的测量报告确定向该 UE发送的切换命令的个数 N;
所述切换命令发送模块,设置为在该 UE的切换过程中, 向该 UE发送 N 个切换命令。
优选地, 所述切换命令个数确定模块是设置为釆用以下方式根据 UE上 报的测量报告确定向 UE发送的切换命令的个数 N:根据所述 UE上报的测量 事件确定向所述 UE发送的切换命令的个数 N,或者,根据所述 UE上报的测 量事件以及当前服务小区的信号质量确定向所述 UE发送的切换命令的个数 N。
优选地, 所述切换命令个数确定模块是设置为釆用以下方式根据 UE上 报的测量事件确定向 UE发送的切换命令的个数 N:当 UE上报的测量事件为 A5时, 所述切换命令个数确定模块确定向 UE发送的切换命令个数 N > 2, 优选 N=3。
优选地, 所述切换命令个数确定模块是设置为釆用以下方式根据 UE上 报的测量事件以及当前服务小区的信号质量确定向 UE发送的切换命令的个 数 N:
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量大 于第一门限, 则确定 N=A; 或者
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量小 于第一门限, 大于第二门限, 则确定 N=B; 或者
当 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质量小
于第二门限, 则确定 N=C;
其中第一门限〉第二门限〉第三门限, 所述 A > B > C > 1。
实施例 1 :
步骤 110, UE发送测量报告给 eNodeB;
步骤 120, eNodeB基于测量报告和 RRM算法确定切换目标小区, 并将 UE的上下文信息随切换请求一起发送到切换目标小区的 eNodeB;
步骤 130, 目标 eNodeB将预分配给切换 UE的 C-RNTI和其他参数 (接 入参数、 SIB等)在上下文确认消息中返回给源 eNodeB;
步骤 140, 源 eNodeB在收到上下文确认消息后, 将数据包转发到目标 eNodeB;
步骤 150, 源 eNodeB判断 UE测量报告中的测量事件为 A3 ,且 UE上报 的服务小区的 RSRP值大于 lOOdBm, 则确定发送切换命令的次数为 3次; 步骤 160, 源 eNodeB根据确定的发送次数向 UE发送切换命令; 具体地, 源 eNodeB 可釆用定时器结合计数器的方式来实现, 例如源 eNodeB可以设置切换命令发送计数器(HoTime )总数为 3 , 以及一个时间长 度为 Ts的切换命令重发定时器, 釆用图 2所示流程实现, 包括:
步骤 a,源 eNodeB向 UE发送一个切换命令,切换命令发送计数器加一; 步骤 b , 启动切换命令重发定时器;
步骤 c, 判断切换命令重发定时器是否超时, 如果是, 执行步骤 d, 如果 不是, 返回步骤 c;
步骤 d, 判断切换命令发送计数器是否等于切换命令发送计数器总数, 如果是, 则结束, 如果不是, 返回步骤 。
本实施例中釆用定时器结合计数器的方式实现仅为一种举例, 在其他实 施例中, 可以釆用其他已知方法来实现。
步骤 170, UE收到切换命令, 启动目标 eNodeB的上行同步过程, 同时 向目标 eNodeB获取上行的 TA;
步骤 180, 目标 eNodeB向 UE返回 TA并向 UE指示分配的资源位置 , UE向目标 eNodeB返回切换完成( HandOver Comfirm ) 消息;
步骤 190, 目标 eNodeB向源 eNodeB指示切换完成, 源 eNodeB清空已 经被转发到目标 eNodeB的数据。
实施例 2:
步骤 210 , UE发送测量报告给 eNodeB;
步骤 220, eNodeB基于测量报告和 RRM算法确定切换目标小区, 并将 UE的上下文信息随切换请求一起发送到切换目标小区的 eNodeB;
步骤 230, 目标 eNodeB将预分配给切换 UE的 C-RNTI和其他参数 (接 入参数、 SIB等)在上下文确认消息中返回给源 eNodeB;
步骤 240, 源 eNodeB在收到上下文确认消息后, 将数据包转发到目标 eNodeB;
步骤 250, 源 eNodeB判断 UE测量报告中的测量事件为 A3 ,且 UE上报 的服务小区的 RSRP值小于 90dBm, 则确定发送切换命令的次数为 1次; 步骤 260, 源 eNodeB根据确定的发送次数向 UE发送切换命令; 具体操作参见实施例 1中的描述。
步骤 270, UE收到切换命令, 启动目标 eNodeB的上行同步过程, 同时 向目标 eNodeB获取上行的 TA;
步骤 280 , 目标 eNodeB向 UE返回 TA并向 UE指示分配的资源位置,
UE向目标 eNodeB返回切换完成消息;
步骤 290, 目标 eNodeB向源 eNodeB指示切换完成, 源 eNodeB清空已 经被转发到目标 eNodeB的数据。
实施例 3:
步骤 310 , UE发送测量报告给 eNodeB;
步骤 320, eNodeB基于测量报告和 RRM算法确定切换目标小区, 并将
UE的上下文信息随切换请求一起发送到切换目标小区的 eNodeB;
步骤 330, 目标 eNodeB将预分配给切换 UE的 C-RNTI和其他参数 (接 入参数、 SIB等)在上下文确认消息中返回给源 eNodeB;
步骤 340, 源 eNodeB在收到上下文确认消息后, 将数据包转发到目标 eNodeB;
步骤 350, 源 eNodeB判断 UE测量报告中的测量事件为 A5, 则确定发 送切换命令的次数为 3次;
设置切换命令的流程如图 3所示。
步骤 360, 源 eNodeB根据确定的发送次数向 UE发送切换命令; 具体操作参见实施例 1中的描述。
步骤 370, UE收到切换命令, 启动目标 eNodeB的上行同步过程, 同时 向目标 eNodeB获取上行的 TA;
步骤 380 , 目标 eNodeB向 UE返回 TA并向 UE指示分配的资源位置 , UE向目标 eNodeB返回切换完成消息;
步骤 390, 目标 eNodeB向源 eNodeB指示切换完成, 源 eNodeB清空已 经被转发到目标 eNodeB的数据。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
上述技术方案提供一种终端切换的方法及装置, 避免终端的业务中断。 所述方法和装置在现有技术的基础上, 针对同一次切换, 通过判决服务小区 与邻区的信号质量, 决定是否下发多个切换命令, 保证 UE能够及时收到切 换命令, 增加切换成功率, 使 UE尽快在目标小区同步, 从而减小切换时延, 增强切换过程中的用户体验。
Claims
1、 一种终端切换的方法, 包括:
源演进型基站( eNB )在确定用户设备 ( UE )需要切换后, 根据所述 UE 上报的测量报告确定向所述 UE发送的切换命令的个数 N;在所述 UE的切换 过程中, 向所述 UE发送 N个切换命令, N为正整数。
2、 如权利要求 1所述的方法, 其中:
所述根据所述 UE上报的测量报告确定向所述 UE发送的切换命令的个数 N的步骤包括:
根据所述 UE上报的测量事件确定向所述 UE发送的切换命令的个数 N, 或者, 根据所述 UE上报的测量事件以及当前服务小区的信号质量确定向所 述 UE发送的切换命令的个数 N。
3、 如权利要求 2所述的方法, 其中:
所述根据所述 UE上报的测量事件确定向所述 UE发送的切换命令的个数 N的步骤包括:
当所述 UE上报的测量事件为 A5时, 确定向 UE发送的切换命令个数 N
》1。
4、 如权利要求 3所述的方法, 其中:
所述根据所述 UE上报的测量事件确定向所述 UE发送的切换命令的个数 N的步骤包括:
当所述 UE上报的测量事件为 A5时, 确定向 UE发送的切换命令个数
N=3。
5、 如权利要求 2所述的方法, 其中:
所述根据所述 UE上报的测量事件以及当前服务小区的信号质量确定向 所述 UE发送的切换命令的个数 N的步骤包括:
当所述 UE上报的测量事件为 A3 , 且所述 UE上报的当前服务小区的信 号质量大于第一门限时, 确定 N=A; 或者
当所述 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质 量小于第一门限, 大于第二门限时, 确定 N=B; 或者
当所述 UE上报的测量事件为 A3 , 且 UE上报的当前服务小区的信号质 量小于第二门限时, 确定 N=C;
其中第一门限〉第二门限〉第三门限, 所述 A > B > C > 1 ; A、 B和 C为 整数。
6、 如权利要求 5所述的方法, 其中:
所述当前服务小区的信号质量包括: 参考信号接收功率(RSRP )或参考 信号接收质量(RSRQ ) 。
7、 一种终端切换的装置, 位于演进型基站(eNB ) , 所述装置包括切换 命令个数确定模块和切换命令发送模块, 其中:
所述切换命令个数确定模块设置为: 在确定用户设备 ( UE )需要切换后, 根据所述 UE上报的测量报告确定向所述 UE发送的切换命令的个数 N;
所述切换命令发送模块设置为: 在所述 UE 的切换过程中, 向所述 UE 发送 N个切换命令;
其中 N为正整数。
8、 如权利要求 7所述的装置, 其中:
所述切换命令个数确定模块是设置为釆用以下方式根据所述 UE上报的 测量报告确定向所述 UE发送的切换命令的个数 N:
根据所述 UE上报的测量事件确定向所述 UE发送的切换命令的个数 N, 或者, 根据所述 UE上报的测量事件以及当前服务小区的信号质量确定向所 述 UE发送的切换命令的个数 N。
9、 如权利要求 8所述的装置, 其中:
所述切换命令个数确定模块是设置为釆用以下方式根据 UE上报的测量 事件确定向 UE发送的切换命令的个数 N:
当 UE上报的测量事件为 A5时, 所述切换命令个数确定模块确定向 UE 发送的切换命令个数 N > 2。
10、 如权利要求 9所述的装置, 其中, 所述切换命令个数确定模块是设 置为釆用以下方式根据 UE上报的测量事件确定向 UE发送的切换命令的个数 N:
当 UE上报的测量事件为 A5时, 所述切换命令个数确定模块确定向 UE 发送的切换命令个数 N=3。
11、 如权利要求 8所述的装置, 其中:
所述切换命令个数确定模块是设置为釆用以下方式根据 UE上报的测量 事件以及当前服务小区的信号质量确定向 UE发送的切换命令的个数 N: 当 UE上报的测量事件为 A3, 且 UE上报的当前服务小区的信号质量大 于第一门限时, 确定 N=A; 或者
当 UE上报的测量事件为 A3, 且 UE上报的当前服务小区的信号质量小 于第一门限, 大于第二门限时, 确定 N=B; 或者
当 UE上报的测量事件为 A3, 且 UE上报的当前服务小区的信号质量小 于第二门限时, 确定 N=C;
其中第一门限〉第二门限〉第三门限, 所述 A>B>C>1 ; A、 B和 C 为整数。
12、 如权利要求 11所述的装置, 其中:
所述当前服务小区的信号质量包括: 参考信号接收功率(RSRP)或参考 信号接收质量(RSRQ) 。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110176027.2A CN102857964B (zh) | 2011-06-28 | 2011-06-28 | 一种终端切换的方法及装置 |
CN201110176027.2 | 2011-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013000235A1 true WO2013000235A1 (zh) | 2013-01-03 |
Family
ID=47404076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2011/082604 WO2013000235A1 (zh) | 2011-06-28 | 2011-11-22 | 一种终端切换的方法及装置 |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN102857964B (zh) |
WO (1) | WO2013000235A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10091699B2 (en) * | 2013-02-13 | 2018-10-02 | Qualcomm Incorporated | Handover decisions based on absolute channel quality of serving cell |
CN104053197A (zh) * | 2013-03-15 | 2014-09-17 | ***通信集团公司 | 地空长期演进***中飞机器的切换方法、基站及飞行器 |
CN103731891B (zh) * | 2013-12-27 | 2017-08-29 | 上海华为技术有限公司 | 控制方法和装置 |
WO2020061899A1 (zh) * | 2018-09-27 | 2020-04-02 | 华为技术有限公司 | 小区切换的方法和装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101466127A (zh) * | 2008-12-30 | 2009-06-24 | 上海无线通信研究中心 | 一种提高切换成功率的小区切换方法 |
CN101877895A (zh) * | 2009-04-30 | 2010-11-03 | 大唐移动通信设备有限公司 | 一种小区切换方法和*** |
CN102084687A (zh) * | 2008-07-04 | 2011-06-01 | 爱立信电话股份有限公司 | 移动电信网络中的切换命令大小的修改 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2149274B1 (en) * | 2007-04-27 | 2017-04-05 | Optis Wireless Technology, LLC | Handover using dedicated resources reserved for a limited time interval |
-
2011
- 2011-06-28 CN CN201110176027.2A patent/CN102857964B/zh not_active Expired - Fee Related
- 2011-11-22 WO PCT/CN2011/082604 patent/WO2013000235A1/zh active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102084687A (zh) * | 2008-07-04 | 2011-06-01 | 爱立信电话股份有限公司 | 移动电信网络中的切换命令大小的修改 |
CN101466127A (zh) * | 2008-12-30 | 2009-06-24 | 上海无线通信研究中心 | 一种提高切换成功率的小区切换方法 |
CN101877895A (zh) * | 2009-04-30 | 2010-11-03 | 大唐移动通信设备有限公司 | 一种小区切换方法和*** |
Also Published As
Publication number | Publication date |
---|---|
CN102857964A (zh) | 2013-01-02 |
CN102857964B (zh) | 2017-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2982165B1 (en) | Methods of operating radio access network base stations and related network nodes | |
JP6489207B2 (ja) | 通信システム | |
CN102883361B (zh) | 小区信息上报和小区移动性参数调整的方法及设备 | |
AU2010200888B2 (en) | Method and system for performing handover in a wireless communication system | |
US10638440B2 (en) | Method for determining measurement gap length and network device | |
RU2634704C1 (ru) | Способ передачи обслуживания между сотами, базовая станция и система | |
US8903399B2 (en) | Methods and network nodes for detecting short stay handover | |
US10091681B2 (en) | Mobile terminals and methods for performing a measurement | |
JP2011512718A (ja) | Rat間/周波数間隣接関係リストの自動管理 | |
CN104956731A (zh) | 用于在移动通信***中针对具有小小区服务区域的小区控制移动性的方法和装置 | |
AU2014250095A1 (en) | Handover request indicating split of a radio bearer between cells | |
CN107426810B (zh) | 上行定时的获取方法及装置 | |
WO2013000235A1 (zh) | 一种终端切换的方法及装置 | |
KR102207843B1 (ko) | 기지국간 협력을 통한 핸드오버 방법 및 그 장치 | |
US20230276279A1 (en) | Method and apparatus for activating or deactivating a scg in wireless communication system | |
KR20230127595A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127592A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127593A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127598A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127597A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127609A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127594A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127601A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127602A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 | |
KR20230127608A (ko) | 무선 이동 통신 시스템에서 부 셀그룹을 활성화하거나 비활성화하는 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11868572 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11868572 Country of ref document: EP Kind code of ref document: A1 |