WO2010051782A1 - 一种服务小区切换的通知方法、装置和系统 - Google Patents

一种服务小区切换的通知方法、装置和系统 Download PDF

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Publication number
WO2010051782A1
WO2010051782A1 PCT/CN2009/075240 CN2009075240W WO2010051782A1 WO 2010051782 A1 WO2010051782 A1 WO 2010051782A1 CN 2009075240 W CN2009075240 W CN 2009075240W WO 2010051782 A1 WO2010051782 A1 WO 2010051782A1
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WO
WIPO (PCT)
Prior art keywords
cell
network controller
radio network
user equipment
handover
Prior art date
Application number
PCT/CN2009/075240
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English (en)
French (fr)
Inventor
高永强
郑潇潇
孟艳
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to AU2009311082A priority Critical patent/AU2009311082B2/en
Priority to US13/127,651 priority patent/US8718651B2/en
Priority to EP09824437.9A priority patent/EP2451209B1/en
Publication of WO2010051782A1 publication Critical patent/WO2010051782A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0061Transmission or use of information for re-establishing the radio link of neighbour cell information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • H04W36/142Reselecting a network or an air interface over the same radio air interface technology
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/12Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a notification method, apparatus, and system for serving cell handover.
  • WCDMA Wideband CDMA
  • 3GPP 3rd Generation Partnership Project
  • HSDPA High Speed Downlink Packet Access
  • HSDPA High-Speed Downlink Shared Channel
  • HSDPA introduces the HS-DSCH shared control channel (HS-SCCH) and the high-speed dedicated physical control channel (High Speed Dedicated Physical Control) at the physical layer for control, scheduling and feedback of the corresponding HS-DSCH channel.
  • HS-DPCCH High-Speed Downlink Shared Channel
  • the downlink and uplink physical control channels can directly and quickly complete the signaling interaction between the user equipment (UE) and the base station (Node B).
  • the HSDPA technology introduces MAC-hs/ehs entities at the Media Access Control (MAC) layer of the UE and Node B to perform related functions such as scheduling, feedback, and retransmission; and utilizes fast hybrid automatic repeat request (Fast Hybrid) ARQ) performance, and directly controlled by Node B, improved The speed of retransmission reduces the delay of data transmission.
  • MAC Media Access Control
  • Node B utilizes fast hybrid automatic repeat request (Fast Hybrid) ARQ) performance, and directly controlled by Node B, improved The speed of retransmission reduces the delay of data transmission.
  • An aspect of the present invention provides a method for notifying a serving cell handover, the method comprising: establishing, by a radio network controller, a radio link with a candidate cell, where the radio network controller is in a process of establishing the radio link The candidate cell is configured; the radio network controller sends the configuration information of the candidate cell to the user equipment; after the radio network controller knows the optimal cell, the radio base controller notifies the target base station to send the service to the user equipment by using the IUB interface signaling message. a cell handover command, the serving cell handover instruction instructing the user equipment to switch to the optimal cell according to the configuration information.
  • Another aspect of the present invention also provides a notification device for serving cell handover, the device comprising: a radio link setup and configuration unit, configured to establish a radio link with a candidate cell, and during establishment of the radio link
  • the radio link setup and configuration unit configures the candidate cell
  • the sending unit is configured to send the configuration information of the candidate cell to the user equipment
  • the notification unit is configured to: after obtaining the optimal cell, pass
  • the IUB interface signaling message notifies the target base station to send a serving cell handover command to the user equipment, where the serving cell handover instruction instructs the user equipment to switch to the optimal cell according to the configuration information delivered by the sending unit.
  • Another aspect of the present invention provides a communication system, where the system includes a radio network controller, and the radio network controller is configured to establish a radio link with a candidate cell, during the establishment of the radio link, Configuring the candidate cell to send the configuration information of the candidate cell to the user equipment; and, after learning the optimal cell, notifying the target base station to the user by using an IUB interface signaling message
  • the device sends a serving cell handover command, where the serving cell handover instruction instructs the user equipment to switch to the optimal cell according to the configuration information.
  • the radio network controller when performing handover of the serving cell, notifies the target base station to instruct the UE to perform handover of the serving cell by transmitting an IUB interface signaling message to the target base station, thereby avoiding using the radio link reconfiguration message. Notifying the target base station of the delay caused by the handover of the serving cell and the repeated configuration of the serving cell, the delay in the handover process of the HS-DSCH serving cell can be greatly reduced, the call drop rate is reduced, and the user experience is enhanced.
  • FIG. 1 is a schematic flowchart of a handover procedure of an HS-DSCH serving cell according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for notifying a serving cell handover according to an embodiment of the present invention
  • FIG. 3 is another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram 1 of a notification device for serving cell handover according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram 2 of a notification device for serving cell handover according to an embodiment of the present invention
  • the following embodiments of the present invention mainly apply to a scenario in which a source cell and a target cell access the network through different base stations in a handover process, and are also applicable to a scenario in which a source cell and a target cell access the network through the same base station.
  • the embodiment of the present invention mainly uses the handover of the HS-DSCH serving cell as an example. As shown in FIG. 1, the following mainly includes the following content.
  • the RNC receives the 1A event reported by the UE, and learns the candidate cell (cell). For example, the UE sends an intra-frequency measurement report to the RNC, where the trigger event of the measurement report may be a 1A event or a 1E event, where the 1A event and the 1E event are that the UE instructs the network to add a new cell to the active set (UE).
  • the main difference between the 1A event and the 1E event is that the trigger threshold of the 1A event is relative, the trigger threshold of the 1E event is absolute, and the 1A event and the 1E event can be used in combination or separately.
  • a radio link is established between the RNC and the candidate cell.
  • the RNC establishes a radio link with the base station to which the candidate cell belongs.
  • the subsequent description will be directly described as a candidate cell.
  • the RNC may send, by using the target Node B, a radio link addition request message, such as a Radio Link Addition Request, or a radio link, of a Node B Application Protocol (NBAP) supporting a radio network layer control protocol to the candidate cell.
  • a request message such as a Radio link Setup Request, is established to establish a connection with the candidate cell.
  • the radio link addition request message or the radio link setup request message includes related data content for performing radio link configuration, for example, including HSDPA related information: HS-DSCH information, HS-DSCH radio network temporary identifier (Radio Network Temporary Identity (RNTI), High Speed Physical Downlink Shared Channel (HS-PDSCH) radio link number, and the like.
  • the candidate cell After receiving the foregoing radio link increase request message or the radio link setup request message, the candidate cell completes the corresponding radio link configuration, and sends a radio link addition response message, such as a Radio link Addition Response, or the radio to the RNC through the target Node B.
  • a radio link addition response message such as a Radio link Addition Response
  • Link establishment response message such as Radio link Setup Response.
  • the RNC performs radio link reconfiguration on the candidate cell.
  • the RNC sends a radio link reconfiguration preparation message, such as a Radio Link Reconfiguration Prepare, to the candidate cell through the target Node B, where the radio link reconfiguration preparation message includes information related to HS-DSCH addition, modification, and deletion, and the information is targeted.
  • Node B is used for wireless Addition, modification, and deletion of related HS-DSCH channels on the link.
  • the HSDPA-related content in the radio link reconfiguration preparation message is substantially similar to the content in the radio link addition request message or the radio link setup request message.
  • the candidate cell performs a corresponding modification according to the foregoing radio link reconfiguration preparation message, and after the required resources are reserved for the new configuration of the radio link, the target Node B sends a radio link reconfiguration complete message to the RNC, for example, Radio Link Reconfiguration Ready. .
  • the RNC sends the configuration information to the user equipment.
  • the RNC sends the configuration information to the UE by using an activation set update message, such as Active Set Update, to notify the UE that a new radio link already exists, and the configuration information includes HS-DSCH related configuration information and a corresponding enhanced dedicated channel (Enhanced). Dedicated Channel, E-DCH) configuration information.
  • an activation set update message such as Active Set Update
  • the UE adds a new radio link in the radio link set and sends an active set update complete message to the RNC, such as Active Set Update Complete, to indicate that the new radio link is added to the active set update completion.
  • an active set update complete message such as Active Set Update Complete
  • the RNC After receiving the 1D event reported by the UE, the RNC performs a handover decision (Handover decision). 16: After the RNC makes the handover decision, it sends a radio link reconfiguration commit message to the target Node B, for example, Radio Link Reconfiguration Commit, to notify the target Node B to perform handover of the HS-DSCH serving cell.
  • a handover decision for example, Radio Link Reconfiguration Commit
  • the RNC sends a radio link reconfiguration commit message to the source Node B, informing the source Node B to perform handover of the HS-DSCH serving cell.
  • the serving RNC SRNC
  • DRNC drift RNC
  • the target Node B sends an HS-DSCH Shared Control Channel Command (HS-SCCH order) to the UE, and notifies the UE to perform handover of the HS-DSCH serving cell.
  • HS-SCCH order HS-DSCH Shared Control Channel Command
  • the user equipment performs handover of the HS-DSCH serving cell.
  • the UE in the asynchronous mode, the UE officially switches to the target cell to receive the HS-DSCH channel data after receiving the HS-SCCH order for 40 ms.
  • the UE switches at the specified activation time.
  • the relevant HS-DSCH channel data is received to the target cell.
  • the UE After performing handover of the HS-DSCH serving cell, the UE sends a radio link reconfiguration end message to the RNC, for example, Radio Link Reconfiguration Complete, and the HS-DSCH serving cell switching process ends.
  • a radio link reconfiguration end message for example, Radio Link Reconfiguration Complete
  • a method for notifying a serving cell handover according to an embodiment of the present invention, as shown in FIG. 2, includes the following content.
  • the radio network controller establishes a radio link with the candidate cell, where the radio network controller configures the candidate cell during the establishment of the radio link;
  • the radio network controller sends the configuration information of the candidate cell to the user equipment.
  • the target base station After the radio network controller learns the optimal cell, the target base station sends a serving cell handover command to the user equipment by using the IUB interface signaling message, where the serving cell handover instruction instructs the user equipment to switch to the optimal according to the configuration information. Community.
  • the technical solution adopted in this embodiment no longer uses the reconfiguration message to configure the candidate cell that has been configured when the radio link is established, and no longer uses the reconfiguration message to notify the target base station of the indication.
  • the user equipment performs handover of the serving cell.
  • the radio network controller when performing handover of the serving cell, notifies the target base station to instruct the UE to perform handover of the serving cell by transmitting an IUB interface signaling message to the target base station, thereby avoiding the use of the radio link reconfiguration message notification.
  • the target base station indicates the delay caused by the handover of the serving cell and the repeated configuration of the serving cell, which can greatly reduce the delay in the handover process of the HS-DSCH serving cell, reduce the dropped call rate, and enhance the user experience.
  • a method for notifying a serving cell handover according to another embodiment of the present invention, as shown in FIG. 3, includes the following content.
  • the RNC establishes a radio link with the candidate cell, and configures the candidate cell.
  • the radio network controller configures the post-selection cell in the process of establishing a radio link with the candidate cell.
  • the UE sends an intra-frequency measurement report to the RNC, where the trigger event of the measurement report is a 1A event, but is not limited thereto, and may be a 1E event, to indicate that the network adds a new cell to the active set, where the 1A The cell corresponding to the event is the candidate cell.
  • the trigger event of the measurement report is a 1A event, but is not limited thereto, and may be a 1E event, to indicate that the network adds a new cell to the active set, where the 1A The cell corresponding to the event is the candidate cell.
  • 21 can be implemented in the following manner.
  • the RNC sends a radio link setup request message, for example, a radio link setup request, to the candidate cell to establish a radio connection with the candidate cell.
  • a radio link setup response message For example, Radio link Setup Response.
  • the RNC sends a radio link addition request message, for example, a Radio link Addition Request, to the candidate cell to establish a radio connection with the candidate cell.
  • a radio link addition request message for example, a Radio link Addition Request
  • the candidate cell After receiving the radio connection, the candidate cell sends a radio link increase message to the RNC.
  • a radio link increase message for example, should be Radio link Addition Response.
  • the resource configuration of the candidate cell can be implemented, and the resource content is known and will not be described again.
  • the RNC sends the configuration information to the user equipment.
  • the RNC sends the configuration information to the user equipment by using an activation set update message, such as an Active Set Update, where the configuration information is carried in the activation set update message.
  • the information includes HS-DSCH related configuration information and corresponding E-DCH configuration information; the user equipment adds a new radio link in the radio link set, and sends an activation set update complete message, such as Active Set Update Complete, to the RNC to indicate activation.
  • the set update is complete.
  • the RNC After the RNC learns the optimal cell, it sends an IUB interface signaling message to the target Node B, and notifies the target Node B to send a serving cell handover command to the user equipment, instructing the user equipment to switch to the optimal cell according to the configuration information.
  • the RNC After the RNC learns the optimal cell, it sends an IUB interface signaling message to the target Node B, and notifies the target Node B to send a serving cell handover command to the user equipment, instructing the user equipment to switch to the optimal cell according to the configuration information.
  • the RNC After the RNC learns the optimal cell, it sends an IUB interface signaling message to the target Node B, and notifies the target Node B to send a serving cell handover command to the user equipment, instructing the user equipment to switch to the optimal cell according to the configuration information.
  • the RNC After the RNC learns the optimal cell, it sends an IUB interface signaling message to the target Node B, and notifies the target Node B to send
  • the RNC receives the 1D event reported by the user equipment, and uses the cell corresponding to the 1D event as the optimal cell.
  • the RNC After the RNC makes the handover decision, send the IUB interface signaling message to the target Node B. At the same time, the RNC sends the IUB interface signaling message to the source Node B to notify the source Node B to perform the HS-DSCH service. Cell handover.
  • the target Node B sends an HS-SCCH order to the user equipment according to the received IUB interface signaling message, to notify the user equipment to perform handover of the HS-DSCH serving cell according to the foregoing configuration information.
  • the foregoing IUB interface signaling message may be implemented in multiple manners.
  • the IUB interface signaling message may be a HS-DSCH serving cell handover command, and the HS-DSCH serving cell handover command carries synchronous or asynchronous mode indication information, HS- SCCH channelization code, activation time connection frame number CFN value (corresponding to synchronization mode only), MAC-ehs reset indication, and HS-SCCH order repetition number.
  • the radio link reconfiguration of the candidate cell by the RNC in the foregoing step 13 is not required, and the message is not notified by the radio link reconfiguration.
  • the Node B instructs the UE to perform handover of the serving cell, and uses the IUB interface signaling message to notify the target Node B to instruct the UE to perform handover of the serving cell.
  • the method further includes: the RNC (the RNC is configured to implement the function of the SRNC) sends an IUR interface signaling message to the DRNC corresponding to the DRNC to notify the DRNC to perform the handover of the HS-DSCH service cell.
  • the RNC the RNC is configured to implement the function of the SRNC
  • the user equipment performs the handover of the HS-DSCH service cell according to the above-mentioned HS-SCCH order from the target Node B.
  • the specific processing method refer to step 17 above.
  • the candidate cell is configured according to the radio link establishment process, and the radio link reconfiguration message is no longer used.
  • the candidate cell performs the pre-configuration process.
  • the RNC decides to perform the handover, the RNC no longer informs the target Node B to instruct the UE to perform the handover of the serving cell through the radio link reconfiguration submission message, but uses the IUB interface signaling message to notify the target.
  • the Node B instructs the UE to perform the handover of the serving cell, and avoids the delay caused by the handover of the serving cell by the target Node B by using the radio link reconfiguration message and the repeated configuration of the serving cell, which can greatly reduce the HS-DSCH.
  • the delay in the handover process of the serving cell reduces the dropped call rate and enhances the user experience.
  • the embodiment of the present invention further provides a notification device for serving cell handover. As shown in FIG. 4, the device includes: a radio link setup and configuration unit 41, a sending unit 42, and a notification unit 43.
  • the radio link setup and configuration unit 41 establishes a radio link with the candidate cell. During the establishment of the radio link, the radio link setup and configuration unit 41 configures the candidate cell; the sending unit 42 configures the information.
  • the notification unit 43 sends an IUB interface signaling message to the target Node B to notify the target Node B to send the serving cell to the user equipment after learning the optimal cell. And instructing the user equipment to switch to the optimal cell according to the configuration information sent by the sending unit 42.
  • the foregoing IUB interface signaling message carries synchronous or asynchronous mode indication information, an HS-SCCH channelization code, an activation time connection frame number CFN value (corresponding only to a synchronization mode), a MAC-ehs reset indication, and an HS-SCCH order. repeat times.
  • the foregoing radio link setup and configuration unit 41 includes a candidate cell acquisition module 411 and an optimal cell acquisition module 412.
  • the candidate cell obtaining module 411 receives the 1A event or the 1E event reported by the user equipment, and the cell corresponding to the 1A or 1E event is used as the candidate cell;
  • the acquiring module 412 of the optimal cell receives the 1D event reported by the user equipment, and the 1D event is received.
  • the corresponding cell is used as the above optimal cell.
  • the radio link connection with the candidate cell and the configuration of the candidate cell are implemented by the radio link setup and configuration unit 41 described above.
  • the foregoing notification unit 43 is further configured to send the foregoing IUB interface signaling message to the source Node B, to notify the source Node B to perform handover of the HS-DSCH serving cell, and send the IUR interface to the corresponding drift radio network controller DRNC.
  • a signaling message is sent to notify the DRNC to perform handover of the HS-DSCH serving cell.
  • the radio network controller when performing the handover of the serving cell, sends the IUB interface signaling message to the target Node B, and notifies the target Node B to instruct the UE to perform the handover of the serving cell, thereby avoiding adopting the wireless
  • the link reconfiguration message notifies the target Node B of the delay caused by the handover of the serving cell and the repeated configuration of the serving cell, which greatly reduces the delay in the handover process of the HS-DSCH serving cell and reduces the call drop rate. , enhance the user experience.
  • the embodiment of the present invention further provides a communication system. As shown in FIG. 6, the system includes a wireless network controller 61.
  • the radio network controller 61 is configured to establish a radio link with the candidate cell, configure the candidate cell in the process of establishing the radio link, and send the configuration information of the candidate cell to the user equipment; After the cell is used, the target base station is notified by the IUB interface signaling message to send the serving cell handover command to the user equipment, where the serving cell handover command instructs the user equipment to switch to the optimal cell according to the configuration information. Further, according to the method embodiment shown in FIG. 1 and FIG.
  • the radio network controller in the communication system in this embodiment is further configured to receive the 1A event or the 1E event reported by the user equipment, and The cell corresponding to the 1A or 1E event is used as the candidate cell, and receives the 1D event reported by the user equipment, and uses the cell corresponding to the 1D event as the optimal cell; and sends the IUB interface signaling message to the source base station. Notifying the source base station to perform handover of the serving cell; transmitting an IUR interface signaling message to the drift radio network controller, informing the drift radio network controller to perform handover of the serving cell.
  • the radio network controller 61 when performing handover of the serving cell, the radio network controller 61 sends an IUB interface signaling message to the target Node B, and notifies the target Node B to instruct the UE to perform handover of the serving cell, thereby avoiding adopting
  • the radio link reconfiguration message notifies the target Node B of the delay caused by the handover of the serving cell and the repeated configuration of the serving cell, which greatly reduces the delay in the handover process of the HS-DSCH serving cell and reduces the dropped call. Rate, enhance the user experience.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, server, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes.
  • the disclosed systems, devices, and methods may be implemented in other manners without departing from the spirit and scope of the application.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units.
  • Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
  • the described systems, apparatus, and methods, and the schematic diagrams of various embodiments may be combined or integrated with other systems, modules, techniques or methods without departing from the scope of the present application.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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Description

一种服务小区切换的通知方法、 装置和系统
本申请要求于 2008 年 11 月 4 日提交中国专利局、 申请号为 200810175814.3、 发明名称为 "一种服务小区切换的通知方法、 装置和系统" 的 中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通讯技术, 尤其涉及一种服务小区切换的通知方法、 和装 置和系统。
背景技术
在宽带码分多址(Wideband CDMA, WCDMA ) 系统中, 针对高速分组数 据所具有的非对称性、 峰值速率高、 激活时间短等特点, 为了有效利用无线频 谱资源以及提高下行峰值速率和小区吞吐量, 第 3代合作伙伴项目 ( 3rd Generation Partnership Project, 3GPP )标准化组织在 Release 5版本下, 引入了下 行链路增强技术, 即高速下行分组接入 ( High Speed Downlink Packet Access, HSDPA )技术。
HSDPA技术引入了新的传输信道, 即高速下行共享信道 (High-Speed Downlink Shared Channel, HS-DSCH ) , 用于支持增强的交互类、 后台类及流媒 体类接入承载服务; 同时, 为了完成相应 HS-DSCH信道的控制、 调度和反馈, HSDPA在物理层引入了 HS-DSCH共享控制信道(Shared Control Channel for HS-DSCH, HS-SCCH ) , 以及高速专用物理控制信道(High Speed Dedicated Physical Control Channel, HS-DPCCH ) 下行和上行两类物理控制信道, 可直接 快速完成用户设备 ( UE )和基站(Node B )之间的信令交互。
HSDPA技术在 UE和 Node B的媒体接入控制 ( Media Access Control, MAC ) 层引入了 MAC-hs/ehs实体, 完成相关调度、 反馈和重传等功能; 利用快速混合 自动重传请求(Fast Hybrid ARQ ) 的性能, 并直接由 Node B进行控制, 提高了 重传的速度, 减少数据传输的时延。
然而, 在许多情况下, 例如, 在闹市或者峡谷地区, 以及 UE高速移动时, 源小区信号强度衰落很快, 现有技术在服务小区切换的前期准备阶段特别是进 行无线链路重配置时, 对服务小区重复进行了 HSDPA参数的相应配置, 且由于 发送重配置 Reconfiguration类信令及等待相应的响应消息的时延较长, 从而为服 务小区的切换引入了额外的时延, 导致服务小区的切换消息无法从源小区传达 至 UE,无法进行服务小区的切换,从而造成较高的掉话率;并且,由于 HS-DSCH 服务小区的切换过程时间过长, 造成长时间的业务中断, 降低了提供 VoIP或者 CS over HSPA等实时业务的用户体验。 发明内容
本发明的一方面提供一种服务小区切换的通知方法, 该方法包括: 无线网 络控制器与候选小区建立无线链路, 在所述无线链路的建立过程中, 所述无线 网络控制器对所述候选小区进行配置; 无线网络控制器将所述候选小区的配置 信息下发给用户设备; 无线网络控制器获知最优小区后, 通过 IUB接口信令消 息通知目标基站向所述用户设备发送服务小区切换指令, 所述服务小区切换指 令指示所述用户设备根据所述配置信息切换至所述最优小区。
本发明的另一方面还提供一种服务小区切换的通知装置, 该装置包括: 无 线链路建立与配置单元, 用于与候选小区建立无线链路, 并在所述无线链路的 建立过程中所述无线链路建立与配置单元对所述候选小区进行配置; 发送单元, 用于将所述候选小区的配置信息下发给用户设备; 和通知单元, 用于在获知最 优小区后, 通过 IUB接口信令消息通知目标基站向所述用户设备发送服务小区 切换指令, 所述服务小区切换指令指示所述用户设备根据所述发送单元下发的 配置信息切换至所述最优小区。
本发明的另一方面还提供了一种通信系统, 该系统包括无线网络控制器, 所述无线网络控制器, 用于与候选小区建立无线链路, 在所述无线链路的建立 过程中, 对所述候选小区进行配置; 将所述候选小区的配置信息下发给用户设 备; 以及, 获知最优小区后, 通过 IUB接口信令消息通知目标基站向所述用户 设备发送服务小区切换指令, 所述服务小区切换指令指示所述用户设备根据所 述配置信息切换至所述最优小区。
上述描述的技术方案, 在进行服务小区的切换时, 无线网络控制器通过向 目标基站发送 IUB接口信令消息, 通知该目标基站指示 UE进行服务小区的切 换,避免了采用无线链路重配置消息通知目标基站指示 UE进行服务小区的切换 时带来的时延及对服务小区的重复配置,能够大幅减少 HS-DSCH服务小区的切 换过程中的时延, 降低掉话率, 增强用户体验。
附图说明
图 1为本发明实施例中提供的 HS-DSCH服务小区的切换流程示意图; 图 2为本发明的一个实施例提供的服务小区切换的通知方法流程图; 图 3为本发明的另一个实施例提供的服务小区切换的通知方法示意图; 图 4为本发明实施例提供的服务小区切换的通知装置结构示意图一; 图 5为本发明实施例提供的服务小区切换的通知装置结构示意图二; 图 6为本发明实施例提供的通信系统示意图。
具体实施方式
为了更清楚地说明本发明实施例的技术方案, 下面将结合附图对本发明的 实施例进行详细的介绍, 下面的描述仅仅是本发明的一些实施例, 对于本领域 普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些实施例获 得本发明的其他的实施方式。
本发明以下实施例主要处理切换过程中的源小区和目标小区分别通过不同 的基站接入网络的场景, 也适用于源小区和目标小区通过相同的基站接入网络 的场景。
为了使本发明实施例的技术方案更加清晰, 本发明实施例主要以 HS-DSCH 服务小区的切换为例进行说明, 如图 1所示, 主要包括如下内容。
11 : RNC收到 UE上报的 1A事件, 获知候选小区 (cell )。 例如, UE向 RNC发送同频测量报告,该测量报告的触发事件可以是 1A事 件, 也可以是 1E事件, 其中, 1A事件和 1E事件是 UE指示网络将一个新的小 区加入到激活集(UE 当前正在使用的小区的集合) 的触发事件, 该新小区为 UE的当前服务小区的相邻小区中信号质量较好的小区。 1A事件和 1E事件主要 区别在于 1A事件的触发门限是相对的, 1E事件的触发门限是绝对的, 1A事件 和 1E事件可以联合使用, 也可以单独使用。
上述主要以 1A事件为测量报告的触发事件为例进行说明,相关的描述适用 于 1E事件的情况。
12: RNC与候选小区之间建立无线链路 ( radio link )。
具体实现过程中, 是 RNC与候选小区所属的基站建立无线链路。 为了方便 描述, 后续都将直接描述为候选小区。
例如, RNC可通过目标 Node B, 向候选小区发送支持无线网络层控制协议 的节点 B应用协议( Node B Application Protocol, NBAP ) 的无线链路增加请求 消息,例如 Radio link Addition Request,或者无线链路建立请求消息,例如 Radio link Setup Request, 与候选小区之间建立连接。 其中, 无线链路增加请求消息或 无线链路建立请求消息中包括了进行无线链路配置的相关数据内容, 例如, 包 括 HSDPA相关的信息: HS-DSCH信息, HS-DSCH无线网络临时标识( Radio Network Temporary Identity, RNTI ),高速下行共享物理信道( High Speed Physical Downlink Shared Channel, HS-PDSCH )无线链路号等。
候选小区接收上述无线链路增加请求消息或无线链路建立请求消息后, 完 成相应的无线链路配置后, 通过目标 Node B向 RNC发送无线链路增加响应消 息,例如 Radio link Addition Response,或无线链路建立响应消息,例如 Radio link Setup Response。
13: RNC对候选小区进行无线链路重配置。
以同步模式下无线链路重配置的过程为例进行说明。
RNC 通过目标 Node B 向候选小区发送无线链路重配置准备消息, 例如 Radio Link Reconfiguration Prepare , 该无线链路重配置准备消息中包含有关 HS-DSCH增加、 修改和删除相关的信息, 该信息被目标 Node B用于进行无线 链路上相关 HS-DSCH信道的增加、 修改和删除工作。
无线链路重配置准备消息中与 HSDPA相关的内容,与无线链路增加请求消 息或无线链路建立请求消息中的内容基本相似。
候选小区根据上述无线链路重配置准备消息执行相应的修改, 为无线链路 的新配置保留所需的资源后, 通过目标 Node B向 RNC发送无线链路重配置完 成消息 , 例如 Radio Link Reconfiguration Ready。
值得注意的是, 在上述无线连接建立的过程中, 已执行完无线链路的配置 过程, 13步骤对无线链路再次进行了配置。
14: RNC将配置信息下发给用户设备。
例如, RNC通过激活集更新消息, 例如 Active Set Update, 将配置信息下发 给 UE, 通知 UE新的无线链路已经存在, 该配置信息包括 HS-DSCH相关配置 信息以及对应的增强专用信道( Enhanced Dedicated Channel , E-DCH )配置信息。
UE在无线链路集中增加新的无线链路, 并向 RNC发送激活集更新完成消 息, 例如 Active Set Update Complete, 以表示新的无线链路增加到激活集的更新 完成。
15: RNC收到 UE上报的 1D事件后, 进行切换决策( Handover decision )。 16: RNC做出切换决策后, 向目标 Node B发送无线链路重配置提交消息, 例如 Radio Link Reconfiguration Commit, 通知目标 Node B进行 HS-DSCH服务 小区的切换。
RNC 向源 Node B 发送无线链路重配置提交消息, 通知源 Node B 进行 HS-DSCH服务小区的切换。 并且, 服务 RNC ( SRNC ) 向漂移 RNC ( DRNC ) 发送无线链路重配置提交消息, 通知 DRNC进行 HS-DSCH服务小区的切换。
目标 Node B向 UE发送 HS-DSCH共享控制信道命令( HS-SCCH order ), 通知 UE进行 HS-DSCH服务小区的切换。
17: 用户设备进行 HS-DSCH服务小区的切换。
例如, 异步模式下, UE在收到 HS-SCCH order 40ms后正式切换到目标小 区接收 HS-DSCH信道数据。
例如, 同步模式下, UE在收到 HS-SCCH order后, 在指定的激活时间切换 到目标小区接收相关的 HS-DSCH信道数据。
18: UE执行完 HS-DSCH服务小区的切换后, 向 RNC发送无线链路重配 置结束消息, 例如 Radio Link Reconfiguration Complete, HS-DSCH服务小区切 换过程结束。
本发明的一个实施例提供的服务小区切换的通知方法, 如图 2所示, 该方 法包括如下内容。
21 : 无线网络控制器与候选小区建立无线链路, 在该无线链路的建立过程 中, 上述无线网络控制器对上述候选小区进行配置;
22: 无线网络控制器将上述候选小区的配置信息下发给用户设备;
23: 无线网络控制器获知最优小区后, 通过 IUB接口信令消息通知目标基 站向所述用户设备发送服务小区切换指令, 该服务小区切换指令指示上述用户 设备根据上述配置信息切换至上述最优小区。
由上所述, 可以看出本实施例采用的技术方案不再利用重配置消息, 对在 无线链路建立时已配置过的候选小区再次进行配置, 并且不再利用重配置消息 通知目标基站指示用户设备进行服务小区的切换。
在本实施例中, 进行服务小区的切换时, 无线网络控制器通过向目标基站 发送 IUB接口信令消息, 通知该目标基站指示 UE进行服务小区的切换, 避免 了采用无线链路重配置消息通知目标基站指示 UE 进行服务小区的切换时带来 的时延及对服务小区的重复配置,能够大幅减少 HS-DSCH服务小区的切换过程 中的时延, 降低掉话率, 增强用户体验。
本发明的另一个实施例提供的服务小区切换的通知方法, 如图 3 所示, 该 方法包括如下内容。
21 : RNC与候选小区建立无线链路, 并对该候选小区进行配置。
例如, 无线网络控制器在与候选小区建立无线链路的过程中对上述后选小 区进行配置。
在 21之前, 如图 3所示, 还包括 20。
20: UE向 RNC发送同频测量报告, 该测量报告的触发事件为 1A事件, 但 不限于此,可以为 1E事件, 以指示网络将一个新的小区加入到激活集,所述 1A 事件对应的小区为所述候选小区。
例如, 21可以通过下述方式进行实现。
方式一、 RNC向上述候选小区发送无线链路建立请求消息, 例如 Radio link Setup Request, 请求与该候选小区建立无线连接, 该候选小区接受无线连接后, 向上述 RNC发送无线链路建立响应消息, 例如 Radio link Setup Response。
方式二、 RNC向上述候选小区发送无线链路增加请求消息, 例如 Radio link Addition Request, 请求与该候选小区建立无线连接, 该候选小区接受无线连接 后,向上述 RNC发送无线链路增加响消息,例如应 Radio link Addition Response。
通过上述无线链路的建立过程, 可实现对候选小区的资源配置, 该资源配 容获知, 不再赘述。
22: RNC将配置信息下发给用户设备; 例如, RNC通过激活集更新消息, 例如 Active Set Update, 将配置信息下发给用户设备, 其中, 上述激活集更新消 息中携带上述配置信息, 该配置信息包括 HS-DSCH相关配置信息以及对应的 E-DCH配置信息; 用户设备在无线链路集中增加新的无线链路, 向上述 RNC发 送激活集更新完成消息, 例如 Active Set Update Complete , 以指示激活集更新完 成。
RNC获知最优小区后, 向目标 Node B发送 IUB接口信令消息, 通知该目 标 Node B向用户设备发送服务小区切换指令, 指示该用户设备根据上述配置信 息切换至上述最优小区。 具体包括:
231: RNC接收所述用户设备上报的 1D事件, 将该 1D事件对应的小区作 为所述最优小区。
232: RNC做出切换决策后, 向目标 Node B发送所述 IUB接口信令消息; 同时, RNC将所述 IUB接口信令消息发送给源 Node B , 以通知该源 Node B进 行 HS-DSCH服务小区的切换。
233: 目标 Node B根据接收到的上述 IUB接口信令消息, 向用户设备发送 HS-SCCH order, 以通知用户设备根据上述配置信息进行 HS-DSCH服务小区的 切换。 上述 IUB接口信令消息可有多种实现方式, 例如, IUB接口信令消息可以 为 HS-DSCH服务小区切换命令, 在该 HS-DSCH服务小区切换命令中携带同步 或异步模式指示信息、 HS-SCCH信道化码、 激活时间连接帧号 CFN值 (仅对应 于同步模式)、 MAC-ehs复位指示和 HS-SCCH order重复次数。
在本发明实施例提供的技术方案中, 在进行服务小区的切换过程中, 无需 经过上述步骤 13中 RNC对候选小区进行的无线链路重配置, 不再通过无线链 路重配置提交消息通知目标 Node B指示 UE进行服务小区的切换, 而是采用了 IUB接口信令消息通知目标 Node B指示 UE进行服务小区的切换。
进一步的, 该方法还包括: RNC (该 RNC用于实现 SRNC的功能)向与其 相应的 DRNC发送 IUR接口信令消息, 以通知该 DRNC进行 HS-DSCH服务小 区的切换。
用户设备根据上述的来自目标 Node B的 HS-SCCH order执行 HS-DSCH服 务小区的切换, 具体的处理方法可参见上述步骤 17。
由上所述, 在本发明实施例中, 在 RNC与候选小区建立无线链路后, 考虑 到该无线链路建立过程已对候选小区进行了配置, 不再利用无线链路重配置消 息对该候选小区进行预配置处理, 相应的, RNC在决定执行切换后, 也不再通 过无线链路重配置提交消息通知目标 Node B指示 UE进行服务小区的切换, 而 是利用 IUB接口信令消息通知目标 Node B指示 UE进行服务小区的切换,避免 了采用无线链路重配置消息通知目标 Node B指示 UE进行服务小区的切换时带 来的时延和对服务小区的重复配置,能够大幅减少 HS-DSCH服务小区的切换过 程中的时延, 降低掉话率, 增强用户体验。 本发明实施例还提供了一种服务小区切换的通知装置, 如图 4所示, 该装 置包括: 无线链路建立与配置单元 41、 发送单元 42和通知单元 43。
无线链路建立与配置单元 41与候选小区建立无线链路, 在该无线链路的建 立过程中, 所述无线链路建立与配置单元 41对所述候选小区进行配置; 发送单 元 42将配置信息下发给用户设备;通知单元 43在获知最优小区后,向目标 Node B发送 IUB接口信令消息,通知该目标 Node B向上述用户设备发送服务小区切 换指令, 指示该用户设备根据所述发送单元 42下发的配置信息切换至上述最优 小区。
其中,上述的 IUB接口信令消息中携带同步或异步模式指示信息、 HS-SCCH 信道化码、 激活时间连接帧号 CFN值 (仅对应于同步模式)、 MAC-ehs复位指示 和 HS-SCCH order重复次数。
进一步地, 如图 5所示, 上述无线链路建立与配置单元 41包括候选小区获 取模块 411和最优小区获取模块 412。候选小区获取模块 411接收用户设备上报 的 1A事件或 1E事件, 将该 1A或 1E事件对应的小区作为上述候选小区; 最优 小区的获取模块 412接收上述用户设备上报的 1D事件, 将该 1D事件对应的小 区作为上述最优小区。
通过上述无线链路建立与配置单元 41实现了与候选小区之间无线链路的连 接, 及对上述候选小区的配置。
进一步地,上述通知单元 43还用于将上述 IUB接口信令消息发送给源 Node B, 以通知该源 Node B进行 HS-DSCH服务小区的切换; 向相应的漂移无线网 络控制器 DRNC发送 IUR接口信令消息, 以通知该 DRNC进行 HS-DSCH服务 小区的切换。
本发明实施例提供的技术方案, 在进行服务小区的切换时, 无线网络控制 器通过向目标 Node B发送 IUB接口信令消息, 通知该目标 Node B指示 UE进 行服务小区的切换, 避免了采用无线链路重配置消息通知目标 Node B指示 UE 进行服务小区的切换时带来的时延及对服务小区的重复配置, 大幅减少了 HS-DSCH服务小区的切换过程中的时延, 降低掉话率, 增强用户体验。
本发明实施例还提供了一种通信系统, 如图 6所示, 该系统包括无线网络 控制器 61。
上述无线网络控制器 61 , 用于与候选小区建立无线链路, 在无线链路的建 立过程中, 对上述候选小区进行配置; 将上述候选小区的配置信息下发给用户 设备; 以及, 获知最优小区后, 通过 IUB接口信令消息通知目标基站向上述用 户设备发送服务小区切换指令, 上述服务小区切换指令指示上述用户设备根据 所述配置信息切换至所述最优小区。 进一步地, 根据图 1和图 3所述的方法实施例, 本实施例中的通信系统中 的无线网络控制器还用于, 接收所述用户设备上报的 1 A事件或 1E事件, 并将 该 1A或 1E事件对应的小区作为所述候选小区, 接收所述用户设备上报的 1D 事件, 并将该 1D 事件对应的小区作为所述最优小区; 向源基站发送所述 IUB 接口信令消息, 通知该源基站进行服务小区的切换; 向漂移无线网络控制器发 送 IUR接口信令消息, 通知该漂移无线网络控制器进行服务小区的切换。
本发明实施例提供的通信系统, 在进行服务小区的切换时, 无线网络控制 器 61通过向目标 Node B发送 IUB接口信令消息, 通知该目标 Node B指示 UE 进行服务小区的切换, 避免了采用无线链路重配置消息通知目标 Node B 指示 UE 进行服务小区的切换时带来的时延及对服务小区的重复配置, 大幅减少了 HS-DSCH服务小区的切换过程中的时延, 降低掉话率, 增强用户体验。
所属领域的技术人员可以清楚地了解到, 为描述的方便和筒洁, 上述描述 的系统, 装置和单元功能和工作过程, 仅仅是示意性说明, 它们的具体工作过 程, 可以参考前述方法实施例中的对应过程, 在此不再赘述。
通过以上的实施例的描述, 所属领域的技术人员可以清楚地了解到本发明 可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件, 但很 多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技术方案本质上 或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来, 该计算机 软件产品存储在一个存储介质中, 包括若干指令用以使得一台计算机设备(可 以是个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法 的全部或部分步骤。 而前述的存储介质包括: U 盘、 移动硬盘、 只读存储器 ( ROM )、 随机存取存储器( RAM )、 磁碟或者光盘等各种可以存储程序代码的 介质。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和方 法, 在没有超过本申请的精神和范围内, 可以通过其他的方式实现。 例如, 以 上所描述的装置实施例仅仅是示意性的, 例如, 所述单元的划分, 仅仅为一种 逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单元或组件可以 结合或者可以集成到另一个系统, 或一些特征可以忽略, 或不执行。 其中所述 作为分离部件说明的单元可以是或者也可以不是物理上分开的, 作为单元显示 的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分 布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部模块来实 现本实施例方案的目的。 本领域普通技术人员在不付出创造性劳动的情况下, 即可以理解并实施。
另外, 所描述系统, 装置和方法以及不同实施例的示意图, 在不超出本申 请的范围内, 可以与其它系统, 模块, 技术或方法结合或集成。 另一点, 所显 示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口, 装置 或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形式。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限于 此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到 变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应 以权利要求的保护范围为准。

Claims

权利 要求
1、 一种服务小区切换的通知方法, 其特征在于, 该方法包括:
无线网络控制器与候选小区建立无线链路, 在所述无线链路的建立过程中, 所述无线网络控制器对所述候选小区进行配置;
所述无线网络控制器将所述候选小区的配置信息下发给用户设备; 所述无线网络控制器获知最优小区后, 通过 IUB接口信令消息通知目标基 站向所述用户设备发送服务小区切换指令, 所述服务小区切换指令指示所述用 户设备根据所述配置信息切换至所述最优小区。
2、 根据权利要求 1所述的通知方法, 其特征在于, 该方法还包括: 所述 IUB接口信令消息中携带同步或异步模式指示信息、 激活时间连接帧 号 CFN值、 高速下行共享信道 HS-DSCH共享控制信道 HS-SCCH信道化码、 媒体接入控制实体 MAC-ehs复位指示和 HS-DSCH共享控制信道命令 HS-SCCH order重复次数。
3、 根据权利要求 1或 2所述的通知方法, 其特征在于, 该方法还包括: 所 述服务小区切换指令为 HS-SCCH order。
4、 根据权利要求 1或 2所述的通知方法, 其特征在于, 所述无线网络控制 器获知所述最优小区的方式为:
所述无线网络控制器接收所述用户设备上报的 1D事件, 将该 1D事件对应 的小区为所述最优小区。
5、 根据权利要求 1或 2所述的通知方法, 其特征在于, 在所述无线网络控 制器与候选小区建立无线链路之前, 该方法还包括: 所述无线网络控制器获知 所述候选小区;
所述无线网络控制器获知所述候选小区的方式为: 所述无线网络控制器接 收所述用户设备上报的 1A事件或 1E事件,将该 1A或 1E事件对应的小区作为 所述候选小区。
6、 根据权利要求 1或 2所述的通知方法, 其特征在于, 该方法还包括: 所 述无线网络控制器将所述 IUB接口信令消息发送给源基站, 以通知所述源基站 进行服务小区的切换。
7、 根据权利要求 1或 2所述的通知方法, 其特征在于, 该方法还包括: 所 述无线网络控制器向与其相应的漂移无线网络控制器发送 IUR接口信令消息, 以通知所述漂移无线网络控制器进行服务小区的切换。
8、 一种服务小区切换的通知装置, 其特征在于, 该装置包括:
无线链路建立与配置单元, 用于与候选小区建立无线链路, 在所述无线链 路的建立过程中所述无线链路建立与配置单元对所述候选小区进行配置;
发送单元, 用于将所述候选小区的配置信息下发给用户设备; 和
通知单元, 用于在获知最优小区后, 通过 IUB接口信令消息通知目标基站 向所述用户设备发送服务小区切换指令, 所述服务小区切换指令指示所述用户 设备根据所述发送单元下发的配置信息切换至所述最优小区。
9、 根据权利要求 8所述的通知装置, 其特征在于, 所述无线链路建立与配 置单元包括:
候选小区获取模块, 用于接收所述用户设备上报的 1 A事件或 1E事件, 将 该 1A或 1E事件对应的小区作为所述候选小区; 和
最优小区的获取模块, 用于接收所述用户设备上报的 1D事件, 将该 1D事 件对应的小区作为所述最优小区。
10、 根据权利要求 8 所述的通知装置, 其特征在于, 所述通知单元还用于 向源基站发送所述 IUB接口信令消息, 通知该源基站进行服务小区的切换; 向 相应的漂移无线网络控制器发送 IUR接口信令消息, 通知该漂移无线网络控制 器进行服务小区的切换。
11、 一种通信系统, 其特征在于, 该系统包括无线网络控制器,
所述无线网络控制器, 用于与候选小区建立无线链路, 并在所述无线链路 的建立过程中对所述候选小区进行配置; 将所述候选小区的配置信息下发给用 户设备; 以及, 获知最优小区后, 通过 IUB接口信令消息通知目标基站向所述 用户设备发送服务小区切换指令, 所述服务小区切换指令指示所述用户设备根 据所述配置信息切换至所述最优小区。
12、 根据权利要求 11所述的通信系统, 其特征在于, 所述无线网络控制器 还用于, 接收所述用户设备上报的 1 A事件或 1E事件, 并将该 1A或 1E事件对 应的小区作为所述候选小区, 接收所述用户设备上报的 1D事件, 并将该 1D事 件对应的小区作为所述最优小区。
13、 根据权利要求 11所述的通信系统, 其特征在于,
所述无线网络控制器还用于, 向源基站发送所述 IUB接口信令消息, 通知 该源基站进行服务小区的切换;向漂移无线网络控制器发送 IUR接口信令消息, 通知该漂移无线网络控制器进行服务小区的切换。
14、 根据权利要求 11所述的通信系统, 其特征在于, 所述系统还包括所述 目标基站, 用于接收所述无线网络控制器发送的 IUB接口信令消息, 并向所述 用户设备发送服务小区切换指令。
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