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WO2013189385A2 - 一种基于长期演进的集群业务实现方法和集群用户终端 - Google Patents

一种基于长期演进的集群业务实现方法和集群用户终端 Download PDF

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Publication number
WO2013189385A2
WO2013189385A2 PCT/CN2013/081880 CN2013081880W WO2013189385A2 WO 2013189385 A2 WO2013189385 A2 WO 2013189385A2 CN 2013081880 W CN2013081880 W CN 2013081880W WO 2013189385 A2 WO2013189385 A2 WO 2013189385A2
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WIPO (PCT)
Prior art keywords
cluster
terminal
tpch
lte
user terminal
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PCT/CN2013/081880
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English (en)
French (fr)
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WO2013189385A3 (zh
Inventor
潘磊
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ZTE Corp
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ZTE Corp
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Priority to US14/647,216 priority Critical patent/US9642115B2/en
Priority to EP13807245.9A priority patent/EP2914024B1/en
Publication of WO2013189385A2 publication Critical patent/WO2013189385A2/zh
Publication of WO2013189385A3 publication Critical patent/WO2013189385A3/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/022—Paging systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/022—One-way selective calling networks, e.g. wide area paging
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/185—Selective call encoders for paging networks, e.g. paging centre devices

Definitions

  • Cluster service implementation method based on long-term evolution and cluster user terminal
  • the present invention relates to the field of mobile communication technologies, and in particular, to a cluster service implementation method and a cluster user terminal based on Long Term Evolution (LTE). Background technique
  • Digital trunking communication systems mainly include: Terrestrial Tmnked Radio (TETRA) system, Integrated Digital Enhanced Networks (iDEN) system, Open Open Cluster Architecture (GoTa, Global Open Tmnking Architecture) system, and GT800 System, etc.
  • the group call service is the most basic service provided by the digital trunking communication system.
  • the group call service allows the cluster user terminal to establish a group call to a certain group of cluster user terminals in a given area, using half-duplex mode, during call setup.
  • the system allocates a group call channel to each cell in the group call area, where the uplink is only used by the calling cluster user terminal, and all called cluster user terminals listen to the downlink.
  • the access network system AS Access Stratum
  • UE User Equipment
  • eNB evolved Node B
  • the embodiment of the present invention provides a cluster service implementation method based on LTE and a cluster user terminal.
  • the LTE-based cluster service implementation method provided by the embodiment of the present invention includes: establishing a cluster paging channel TPCH;
  • the network side establishes a cluster group control channel TGCCH and set accordingly.
  • a group service channel TGTCH and the configuration information of the TGTCH is sent by the TGCCH;
  • the second terminal monitors the group call message of the first terminal by using the TPCH, and the TGCCH is monitored to obtain the configuration information;
  • the second terminal Based on the configuration information, the second terminal establishes a local TGTCH bearer to listen to the TGTCH;
  • the first terminal and the second terminal are cluster user terminals.
  • the LTE-based cluster user terminal provided by the embodiment of the present invention includes: a first listening unit, configured to monitor a cluster paging transmission channel TPCH;
  • the group call request unit is set to initiate a group call
  • a second monitoring unit configured to: after the first listening unit listens to a group of call messages through the TPCH, listen to a cluster group control channel TGCCH on the network side, to obtain a cluster group service sent and received on the TGCCH Configuration information of the channel TGTCH;
  • the third intercepting unit is configured to establish a local TGTCH bearer based on the configuration information to listen to the TGTCH.
  • the LTE-based cluster user terminal further includes a group call response unit, configured to: when the cluster user terminal is in a cell other than the cell where the cluster user terminal that initiates the group call is located, the first listening unit is monitored by the TPCH. After the group of call messages, the group call response unit responds to the group call message to obtain a scrambling code to listen to the TGCCH to obtain the configuration information.
  • a group call response unit configured to: when the cluster user terminal is in a cell other than the cell where the cluster user terminal that initiates the group call is located, the first listening unit is monitored by the TPCH. After the group of call messages, the group call response unit responds to the group call message to obtain a scrambling code to listen to the TGCCH to obtain the configuration information.
  • the second intercepting unit obtains a scrambling code when the first listening unit listens to a group of call messages through the TPCH. And listening to the TGCCH to obtain the configuration information.
  • the second intercepting unit and the third listening unit separately monitor the TGCCH and the TGTCH based on the same scrambling code;
  • the scrambling code is a cluster wireless network identifier T-rnti.
  • the LTE-based cluster user terminal further includes a registration processing unit configured to read cluster system information sent and received by the network side on the broadcast control channel BCH, and after the cluster system information is read, the registration processing unit The cluster user terminal registers with the corresponding cell.
  • a registration processing unit configured to read cluster system information sent and received by the network side on the broadcast control channel BCH, and after the cluster system information is read, the registration processing unit The cluster user terminal registers with the corresponding cell.
  • the cluster system information is a system information block sibl9, and is included in sibl9.
  • the information of the paging cycle of the TPCH is as follows: the cluster user terminal calculates the paging cycle of the TPCH by using the information of the paging cycle of the TPCH included in the sibl9, and identifies the TP-mti pair by the trunking call wireless network identifier. The TPCH is monitored.
  • the technical solution of the embodiment of the present invention is based on the original LTE system, adding a logical channel to the cluster UE, and re-dividing the function of the logical channel, realizing the group call process of the cluster UE to other cluster UEs, achieving a point-to-multiple
  • the cluster service function of the point-to-point call avoids the establishment of multiple dedicated bearers, saves the physical resources of the air interface, and can quickly respond to the called service, satisfying the LTE cluster service communication requirements.
  • FIG. 1 is a flowchart of a method for implementing a LTE-based cluster service according to an embodiment of the present invention.
  • FIG. 2 is a process flow diagram of an embodiment of an LTE-based cluster service implementation method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of another embodiment of an implementation method of an LTE-based cluster service according to an embodiment of the present invention.
  • FIG. 4 is a channel mapping diagram of a cluster user terminal side according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an embodiment of a cluster user terminal according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of another embodiment of a cluster user terminal according to an embodiment of the present invention. Preferred embodiment of the invention
  • FIG. 1 is based on the embodiment of the present invention.
  • a flowchart of a method for implementing a cluster service of LTE specifically includes: 5101, establishing a cluster paging channel TPCH on the UE side of the cluster user terminal,
  • the LTE network side establishes a cluster group control channel TGCCH and a cluster group service channel TGTCH, and sends TGTCH configuration information on the TGCCH.
  • the TGCCH is monitored to obtain configuration information of the TGTCH on the TGCCH.
  • the cluster UE Using the configuration information of the TGTCH, the cluster UE establishes a TGTCH bearer resource locally, so as to monitor the TGTCH, and the current group call service is completed.
  • the cluster UE in the above process is any UE supporting the cluster service in the network.
  • the solution is based on the newly established TPCH, TGTCH, and TGCCH, and can implement point-to-multipoint of a cluster UE to other cluster UEs in the LTE network supporting the cluster. Group call business.
  • the UE that initiates the group call service and the UE that joins the group call form a group call group.
  • the cluster UE that initiates the group call serves as the speaking user, and can send voice data through the dedicated service channel DTCH.
  • the other cluster UEs can listen to the voice data on the newly established TGTCH, and perform point-to-multipoint cluster communication of the LTE system.
  • FIG. 2 provides an embodiment of a single cluster UE from booting up to successfully establishing a group call group.
  • the cluster UE starts to search for a suitable cell, first reads the broadcast channel BCH, and receives cluster related system information, where the scheduling information sibl9 of the cluster system is received on the BCCH of the BCH.
  • the sibl9 is received, determining that the cell is a cell supporting the cluster, and the cluster UE is registered in the cell, and the existing AS layer channel mapping relationship may be used to complete the registration.
  • the cluster UE calculates a paging cycle of the cluster TPCH according to the group ID information in sibl9, and then uses the trunking call wireless network identifier TP-rnti as a common paging channel scrambling code to TPCH paging. The channel is listening.
  • the cluster UE can listen to the group call message (if any) on the TPCH, or can initiate a group call by itself, requesting to establish a group call group. This embodiment describes the latter case.
  • the cluster UE initiates a group call, and sends a link establishment request to the network side, where the core network
  • the group is requested to page the group user, and the cluster UE in the same cell monitors the paging on the TPCH, and the scrambling code T-rnti can be directly obtained from the paging message.
  • the group is judged. If it is found to be a group to which the UE belongs, the upper layer is notified, the paging response is returned, and the scrambling code in the paging is performed.
  • T-rnti is configured to the physical layer.
  • the eNB when the network side receives the request to page the whole network, the eNB establishes a TGTCH channel, and transmits the configuration information of the TGTCH on the TGCCH channel, and broadcasts the configuration information to the group UE.
  • the TGCCH can be monitored by using the scrambling code T-rnti obtained directly in the paging message to obtain the configuration information of the TGTCH; for the cluster UEs in different cells, after replying the paging response, The scrambling code is obtained, and the physical layer can monitor the TGCCH according to the scrambling code to obtain configuration information of the TGTCH.
  • Each UE that obtains the TGTCH configuration information locally establishes a TGTCH local bearer resource for monitoring service data on the TGTCH.
  • Each UE starts to monitor service data on the TGTCH, thereby entering a service steady state, and performing point-to-multipoint data transmission.
  • the scrambling codes for listening to TGTCH and TGCCH are the same scrambling code.
  • the non-access stratum NAS (Non Access Stratum) process may be processed in the S202 cluster UE registration process, specifically, the step of updating the group in which the cluster UE is located is added in the registration process, and the The accuracy of the information received by the cluster UE.
  • NAS Non Access Stratum
  • the flow chart shown in FIG. 3 describes a embodiment of the present invention by initiating a group call by one cluster user terminal A and receiving a call to another cluster user terminal B and joining the group call group as an example:
  • the cluster group paging channel TPCH is monitored
  • Terminal A presses the button of the PTT software PTT to initiate a group call
  • the network side broadcasts a paging on the TPCH of each cell in response to its call request; the eNB starts to establish a TGTCH resource, and sends configuration information of the TGTCH on the TGCCH channel;
  • terminal B In response to the paging, terminal B is descrambled according to the scrambling code T-rnti of the TGCCH obtained from the TPCH. Decoding the TGCCH, thereby obtaining configuration information of the TGTCH, and then establishing a local TGTCH resource;
  • the terminal A that is, the user transmits voice data on the dedicated traffic channel DTCH (Dedicated Traffic Channel) established by the network side, and the data can be scrambled by C-rnti; terminal B, That is, the user is listening to the T-rnti descrambling on the local TGTCH established by the user, and listens to the voice data of the terminal A.
  • the number of the terminal B is at least one, and the terminal B described in the embodiment of FIG. 3 is not in the same as the terminal A.
  • the cell when there are multiple other terminals responding with the terminal B, can establish the TGTCH resource locally and listen to the voice data of the terminal A.
  • the scrambling code ⁇ - ⁇ can be directly obtained, and the subsequent steps of establishing the local TGTCH resource are combined with the terminal B and the like to form a
  • the group call group performs cluster business. It can be seen that the point-to-multipoint cluster service of the LTE system is implemented by using the embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a channel mapping relationship on a cluster UE side according to an embodiment of the present invention, where TPCH, TGTCH, and TGCCH are newly established logical channels, and a TPCH channel is mapped to a downlink physical shared channel PDSCH, and TGTCH and TGCCH are mapped to a downlink shared channel.
  • the mapping relationship between DL-SCH and TPCH is TPCCH-TPCH-PDSCH.
  • the mapping of the TPCH to the cluster paging control channel TPCCH is to facilitate the paging of the cluster UE after the UE is started to register, and the network side periodically broadcasts the physical of the cluster group on the newly added TPCH. Resources, the cluster UE initiates a group call through the CCCH.
  • the uplink DTCH is mapped to the UL-SCH, and is used for signaling transmission and voice transmission of the cluster.
  • the downlink direction TGCCH is mapped to the downlink shared channel DL-SCH, and is set to the signaling reception of the cluster user and the cluster listening user; the downlink direction TGTCH is mapped to the DL-SCH, and is set to receive voice data of all the cluster listening users.
  • the mapping relationship between the BCCH and the DL-SCH of the BCH is unchanged, but the scheduling information of the MIB block on the BCCH is different from that of the original protocol.
  • the embodiment of the present invention adds the cluster system information. This is because, when a UE is powered on, it needs to read the broadcast channel BCH to find a suitable cell, and for the cluster system, the UE needs to collect cluster system information. To this end, the management information block MIB on the BCCH. ( Management Information Block ) After the scheduling information sib 19 of the cluster system is entered, the UE can receive the cluster-related system information on the BCH, thereby determining that the cell in which the cell is a cluster supporting the cluster. Correspondingly, the transmission of the cluster SIB block (System Information Block) should be added on the LTE network side.
  • System Information Block System Information Block
  • the BCH of the cell is read. If the SIB block is received and the scheduling information sibl9 of the cluster system is read, it is confirmed that the cell is a cell supporting the cluster, and the terminal accesses the cell. If sibl9 is not read, the cell is considered to be a common public network cell and cannot be clustered. In addition, when sibl9 is added, sib20 is also added to indicate whether the cell supports the cluster private network and the LTE public network concurrently. If the indication is supported, the terminal registers with both the cluster and the LTE network at the same time, and the terminal is a dual-network terminal. The additional functions of the dual-network terminal do not affect the steps performed by the embodiment for the cluster private network. Other mapping relationships and roles in Figure 4 are well known in the art, and the uplink mapping relationship is the same as in the related art and will not be described in detail herein.
  • FIG. 5 is a schematic structural diagram of a cluster user terminal according to an embodiment of the present invention, including: a first listening unit, configured to monitor a cluster paging transmission channel TPCH;
  • the group call request unit is set to initiate a group call
  • a second monitoring unit configured to: after the first listening unit listens to a group of call messages through the TPCH, listen to a cluster group control channel TGCCH on the network side, to obtain a cluster group service sent and received on the TGCCH Configuration information of the channel TGTCH;
  • the third intercepting unit is configured to establish a local TGTCH bearer based on the configuration information of the TGTCH to monitor the TGTCH.
  • the terminal has both an initiating group call requesting unit and a listening unit that listens to group call messages of other terminals, and can switch between the user and the listening user according to the application requirement, and the group
  • the other cluster user terminals in the embodiment complete the group call process of the embodiment of FIG. 4, and perform point-to-multipoint cluster service work.
  • the cluster user terminal may further include a group of call response units.
  • a group of call response units As shown in FIG. 6, when the cluster user terminal is not in the same cell as the cluster user terminal that initiates the group call, after the first interception unit listens to a group call message, The group call response unit responds to the group call message to obtain the corresponding scrambling code to listen to the TGCCH, thereby obtaining configuration information of the TGTCH to establish a local resource. If the cluster user terminal is in the same cell as the cluster user terminal that initiates the group call, the group call response unit does not need to respond to the group call message, and the first listening unit can directly obtain the corresponding interference in the group call message that is monitored. Code, proceed to the next step.
  • the voice data can be sent on the DTCH established on the network side, and other listening users can listen to the voice information in the local TGTCH to perform the cluster service work of the LTE system.
  • the cluster user terminal further has a registration processing unit configured to read the broadcast channel BCH of the cell after the terminal is powered on, and receive system information related to the cluster. If the scheduling information sibl9 of the cluster system is read on the BCH, the cell is confirmed to be supported. The clustered cell is registered and accesses the cell. If there is no sibl9, the cell is considered to be a common public network cell, and the cluster service cannot be performed. The registration process is not performed.
  • the first intercepting unit can calculate the receiving period and time of the TPCH by using the group ID information included in the received sibl9, and listen to the TPCH with the scrambling code TP-rnti.
  • the technical solution of the embodiment of the present invention is based on the original LTE system, adding a logical channel to the cluster UE, and re-dividing the function of the logical channel, realizing the group call process of the cluster UE to other cluster UEs, achieving a point-to-multiple
  • the cluster service function of the point-to-point call avoids the establishment of multiple dedicated bearers, saves the physical resources of the air interface, and can quickly respond to the called service, satisfying the LTE cluster service communication requirements.

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Description

一种基于长期演进的集群业务实现方法和集群用户终端
技术领域
本发明涉及移动通信技术领域， 特别是涉及一种基于长期演进 LTE ( Long Term Evolution ) 的集群业务实现方法和集群用户终端。 背景技术
数字集群通信系统主要包括： 陆上集群无线电（TETRA , Terrestrial Tmnked Radio)系统、 集成数字增强型网络 (iDEN , Integrated Digital Enhanced Networks)系统、 开放式集群架构（GoTa, Global Open Tmnking Architecture) 系统以及 GT800系统等。 组呼业务是数字集群通信系统提供的最基本业务， 组呼业务允许集群用户终端建立到属于某一给定区域某一组集群用户终端的 群组呼叫， 釆用半双工模式， 呼叫建立期间， 系统为组呼区域内的每个小区 分别分配一个组呼信道， 其中上行链路仅供主叫集群用户终端使用， 所有被 叫集群用户终端监听下行链路。
但是， 在 LTE网络中， 目前还缺乏可以支持集群通信需求的组网策略， 因此不能支持点对多点的半双工实时通讯工作方式， 无法满足已经存在的集 群功能的客观使用需求。 在现有的 LTE 系统中， 用户设备 UE ( User Equipment ) 与演进型基站 eNB ( evolved Node B )之间的接入网络体系 AS ( Access Stratum )只能进行点对点的业务， 即便是电话会议， 也需要为每个 用户建立专用承载资源， 导致资源浪费。 发明内容
为了解决相关技术中 LTE网络无法满足集群通信需求的问题，本发明实 施例提供了一种基于 LTE的集群业务实现方法和集群用户终端。
一方面， 本发明实施例提供的基于 LTE的集群业务实现方法包括： 建立集群寻呼信道 TPCH;
第一终端发起组呼后， 网络侧相应地建立集群组控制信道 TGCCH和集 群组业务信道 TGTCH, 并通过 TGCCH下发 TGTCH的配置信息； 第二终端通过所述 TPCH监听到第一终端的组呼消息， 对所述 TGCCH 进行监听以获得所述配置信息；
基于所述配置信息， 第二终端建立本地 TGTCH 承载以监听所述 TGTCH;
其中， 所述第一终端和所述第二终端为集群用户终端。
另一方面， 本发明实施例提供的基于 LTE的集群用户终端包括： 第一监听单元， 设置为监听集群寻呼传输信道 TPCH;
组呼请求单元， 设置为发起组呼；
第二监听单元， 设置为当所述第一监听单元通过所述 TPCH监听到一组 呼消息后， 监听网络侧的集群组控制信道 TGCCH, 以获得在所述 TGCCH 上下发的集群组业务信道 TGTCH的配置信息；
第三监听单元， 设置为基于所述配置信息建立本地 TGTCH承载以监听 所述 TGTCH。
该基于 LTE的集群用户终端还包括组呼响应单元， 设置为当本集群用户 终端处于发起组呼的集群用户终端所在小区之外的小区时， 在所述第一监听 单元通过所述 TPCH监听到一组呼消息后， 所述组呼响应单元对所述组呼消 息进行响应以获得一扰码，以对所述 TGCCH进行监听以获得所述配置信息。
可选地，当本集群用户终端处于发起组呼的集群用户终端所在的小区时， 所述第二监听单元在所述第一监听单元通过所述 TPCH监听到一组呼消息时 获得一扰码， 以对所述 TGCCH进行监听以获得所述配置信息。
可选地， 所述第二监听单元和所述第三监听单元基于相同的扰码分别监 听所述 TGCCH和所述 TGTCH; 所述扰码为集群无线网络标识 T-rnti。
可选地， 该基于 LTE的集群用户终端还包括登记处理单元，设置为读取 网络侧在广播控制信道 BCH上下发的集群系统信息， 当读取到集群系统信 息后， 所述登记处理单元将本集群用户终端登记到对应的小区。
可选地， 所述集群系统信息为系统信息块 sibl9, 并且在 sibl9中包含所 述 TPCH的寻呼周期的信息；集群用户终端以所述 sibl9中包含的所述 TPCH 的寻呼周期的信息， 计算所述 TPCH的寻呼周期， 且以集群呼叫无线网络标 识 TP-mti对所述 TPCH进行监听。
本发明实施例有益效果如下：
本发明实施例的技术方案以原 LTE系统为基础， 在集群 UE端增加了逻 辑信道， 并对逻辑信道的功能重新划分， 实现了集群 UE对其它集群 UE的 组呼过程， 实现了点对多点通话的集群业务功能， 避免建立多个专用承载， 节省了空口物理资源， 同时又能快速响应被叫业务， 满足了 LTE集群业务通 讯需求。 附图概述
图 1是本发明实施例的基于 LTE的集群业务实现方法流程图。
图 2是本发明实施例的基于 LTE的集群业务实现方法的实施例处理流程 图。
图 3是本发明实施例的基于 LTE的集群业务实现方法的另一实施例处理 流程图。
图 4是本发明实施例的集群用户终端侧的信道映射关系图。
图 5是本发明实施例的集群用户终端的实施例的结构示意图。
图 6是本发明实施例的集群用户终端的另一实施例的结构示意图。 本发明的较佳实施方式
以下结合附图以及实施例， 对本发明进行进一步详细说明。 应当理解， 此处所描述的具体实施例仅仅用以解释本发明实施例， 并不限定本发明实施 例。
为了满足 LTE集群功能的需要， 本发明实施例以现有 LTE系统为基础， 在集群用户终端 UE端增加逻辑信道， 并对逻辑信道的功能重新划分， 图 1 所示为本发明实施例的基于 LTE的集群业务实现方法流程图， 具体包括： 5101 , 在集群用户终端 UE侧建立集群寻呼信道 TPCH,
5102, 当某一集群 UE发起组呼后， LTE网络侧相应建立集群组控制信 道 TGCCH和集群组业务信道 TGTCH, 并在 TGCCH上发送 TGTCH的配置 信息；
S103 , 当另一集群 UE通过 TPCH监听到该组呼消息后，对所述 TGCCH 进行监听， 从而获得 TGCCH上的 TGTCH的配置信息；
S104, 利用该 TGTCH的配置信息， 集群 UE在本地建立 TGTCH承载 资源， 从而对 TGTCH进行监听， 至此本次组呼业务完成。
上述过程中的集群 UE为网络内任意支持集群业务的 UE,该方案基于新 建立的 TPCH、 TGTCH和 TGCCH, 可在支持集群的 LTE网络内实现某一集 群 UE对其它集群 UE的点对多点的组呼业务。
发起组呼业务的 UE和加入组呼的 UE形成一个组呼群组， 组呼群组成 功建立后， 发起组呼的集群 UE作为说用户， 可通过专用业务信道 DTCH发 送语音数据， 群组中的其它各个集群 UE可在新建立的 TGTCH上收听到该 语音数据， 开展 LTE系统的点对多点集群通讯。
为了更清楚地介绍本发明实施例的集群业务实现方法， 图 2提供了单个 集群 UE从开机到成功建立一个组呼群组的实施例， 具体地，
5201 , 该集群 UE开机寻找合适的小区， 先读取广播信道 BCH, 接收到 集群相关的系统信息， 其中， 在 BCH的 BCCH上收取到集群系统的调度信 息 sibl9。
5202, 由于收取到了 sibl9, 确定该小区为支持集群的小区， 该集群 UE 在该小区注册登记， 可利用现有的 AS层信道映射关系完成登记。
5203 , 该集群 UE在小区驻留后， 根据 sibl9中的组 ID信息， 计算出集 群 TPCH的寻呼周期，然后用集群呼叫无线网络标识 TP-rnti作为公共寻呼信 道扰码， 对 TPCH寻呼信道进行监听。
至此， 该集群 UE可在该 TPCH上监听到组呼消息 （如果有的话） ， 也 可自身发起组呼， 请求建立组呼群组， 本实施例描述后者的情况。
5204, 该集群 UE发起组呼， 其将建链请求发送到网络侧， 核心网将该 请求在全网对群组用户进行寻呼， 处于同小区的集群 UE在 TPCH上监听到 寻呼， 可从寻呼消息中直接获得扰码 T-rnti。 对于处于不同小区的集群 UE, 在 TPCH上监听到寻呼后， 对群组 Group进行判断， 如果发现是本 UE隶属 的群组， 则通知上层， 回复寻呼响应， 将寻呼中的扰码 T-rnti配置给物理层。
另一方面， 网络侧收到请求在全网进行寻呼的同时， eNB建立 TGTCH 信道， 并在 TGCCH信道上发送 TGTCH的配置信息， 广播给群组 UE。 对于 处于同小区的集群 UE , 可利用在寻呼消息中直接获得的扰码 T-rnti 对 TGCCH进行监听，从而得到 TGTCH的配置信息；对于处于不同小区的集群 UE,在回复寻呼响应后可获得该扰码，其物理层根据此扰码可监听 TGCCH, 获得 TGTCH的配置信息。
获得 TGTCH配置信息的各个 UE在本地建立 TGTCH本地承载资源，用 于监听 TGTCH上的业务数据。
S205, 各 UE开始监听 TGTCH上的业务数据， 从而进入业务稳态， 开 展点对多点的数据传输。 监听 TGTCH和 TGCCH的扰码为相同的扰码。
S206,组呼结束时，发送信令到核心网，核心网通知 eNB释放集群资源， 并释放无线资源控制协议 RRC ( Radio Resource Control )连接（ RRC是处理 UE和 eNodeB之间控制平面的第三层信息） ， 使 UE回到空闲态。
在另一实施例中， 在 S202集群 UE注册登记过程中可对非接入层 NAS ( Non Access Stratum )过程进行处理， 具体是在登记过程中增加对该集群 UE所在组的更新步骤， 保证该集群 UE收取信息的准确性。
图 3所示流程图以一个集群用户终端 A发起组呼， 到另一个集群用户终 端 B接到呼叫并加入组呼群组为例， 描述本发明的实施例：
终端 A和终端 B 分别开机注册登记完成后， 都进行集群群组寻呼信道 TPCH的监听；
终端 A按下一键通话软件 PTT的按键， 发起组呼；
网络侧响应其呼叫请求， 在各个小区的 TPCH上广播寻呼； eNB开始建 立 TGTCH资源， 并在 TGCCH信道上发送 TGTCH的配置信息；
终端 B响应该寻呼， 根据从 TPCH得到的 TGCCH的扰码 T-rnti, 解扰 出 TGCCH的信令， 从而得到 TGTCH的配置信息， 然后建立本地 TGTCH 资源；
整个呼叫流程结束。
在之后的集群通信过程中， 终端 A, 即说用户， 在网络侧为其建立的专 用业务信道 DTCH ( Dedicated Traffic Channel )上发送语音数据， 该数据可 釆用 C-rnti加扰； 终端 B, 即听用户， 在其建立的本地 TGTCH上釆用 T-rnti 解扰， 听取终端 A的语音数据， 这里， 终端 B的个数至少为一个， 图 3实施 例描述的终端 B与终端 A不在同一小区， 当有多个其它终端与终端 B—样 作出响应时， 均可在本地建立 TGTCH资源， 收听到终端 A的语音数据。 另 夕卜， 如果位于终端 A的小区的终端 C隶属于终端 A的集群， 监听到寻呼， 可直接获得扰码 Τ-πώ, 今后后续建立本地 TGTCH资源的步骤， 与终端 B 等共同组成一个组呼群组开展集群业务。可见，利用本发明实施例实现了 LTE 系统的点对多点的集群业务。
图 4为本发明实施例的集群 UE侧的信道映射关系示意图， 其中 TPCH、 TGTCH和 TGCCH均为新建立的逻辑信道， TPCH信道映射到下行物理共享 信道 PDSCH, TGTCH和 TGCCH同映射到下行共享信道 DL-SCH, TPCH 的映射关系为 TPCCH-TPCH-PDSCH。
其中， TPCH到集群寻呼控制信道 TPCCH的映射是为了便于集群 UE开 机注册后读取其它集群 UE的寻呼信息， 网络侧在该新增的 TPCH上周期性 地广播该所有集群群组的物理资源， 集群 UE通过 CCCH发起组呼。
其中， 上行方向 DTCH映射到 UL-SCH, 分别用于集群说用户的信令传 输和语音传输。
其中， 下行方向 TGCCH映射到下行共享信道 DL-SCH, 设置为集群说 用户和集群听用户的信令接收； 下行方向 TGTCH映射到 DL-SCH, 设置为 所有集群听用户的语音数据接收。
其中 , BCH的 BCCH到 DL-SCH的映射关系未变 , 但 BCCH上 MIB块 的调度信息较原协议有所不同， 本发明实施例对其新增加了集群系统信息。 这是因为， 当一个 UE开机后， 要读取广播信道 BCH寻找合适小区， 而针对 集群系统， UE要收取集群系统信息， 为此， 在 BCCH上的管理信息块 MIB ( Management Information Block ) 中力。入集群系统的调度信息 sib 19 , 则 UE 在 BCH上可以接收到集群相关的系统信息， 从而确定所在小区为支持集群 的小区。相应地，在 LTE网络侧应增加集群 SIB块（ System Information Block ) 的发送。
终端开机后读小区的 BCH, 如果接收到 SIB块，读到集群系统的调度信 息 sibl9, 则确认该小区为支持集群的小区， 进行登记， 终端接入该小区。 如 果没有读取到 sibl9,认为该小区是普通公网小区，无法进行集群业务。另外， 在加入 sibl9时还一同加入 sib20,其指示小区是否支持集群专网和 LTE公网 并发， 如果指示支持， 则终端登记时同时在集群和 LTE网络都进行登记， 这 样的终端即双网终端， 双网终端的附加功能不影响本实施例针对集群专网所 进行的各个步骤。 图 4中其它映射关系和作用均为本领域公知， 上行链路映 射关系与相关技术中相同， 在此不作详述。
相应地， 图 5所示为本发明实施例的集群用户终端的结构示意图， 包括： 第一监听单元， 设置为监听集群寻呼传输信道 TPCH;
组呼请求单元， 设置为发起组呼；
第二监听单元， 设置为当所述第一监听单元通过所述 TPCH监听到一组 呼消息后， 监听网络侧的集群组控制信道 TGCCH, 以获得在所述 TGCCH 上下发的集群组业务信道 TGTCH的配置信息；
第三监听单元， 设置为基于所述 TGTCH的配置信息建立本地 TGTCH 承载， 以监听所述 TGTCH。
从图 5的集群用户终端可知， 该终端既具有发起组呼请求单元， 同时也 具有监听其它终端的组呼消息的监听单元， 可以按照应用需要在说用户和听 用户之间转换， 与群组中的其它集群用户终端完成图 4实施例的组呼过程， 开展点对多点的集群业务工作。
集群用户终端还可包括一组呼响应单元， 如图 6所示， 当本集群用户终 端与发起组呼的集群用户终端不在同一个小区时， 在第一监听单元监听到一 个组呼消息后， 组呼响应单元对组呼消息进行响应， 才能获得相应扰码， 来 监听 TGCCH, 从而获得 TGTCH的配置信息建立本地资源。 如果本集群用户终端与发起组呼的集群用户终端在同一个小区时， 则不 需组呼响应单元对组呼消息进行响应 , 第一监听单元在监听到的组呼消息中 可直接获得相应扰码， 进行后续步骤。 使用时， 如果本终端为发起组呼的说 用户， 则可在网络侧建立的 DTCH 上发送语音数据， 其它听用户在本地 TGTCH听取该语音信息， 开展 LTE系统的集群业务工作。
该集群用户终端还具有登记处理单元， 设置为在终端开机后读取小区的 广播信道 BCH, 接收集群相关的系统信息， 如果在 BCH上读到集群系统的 调度信息 sibl9, 则确认该小区为支持集群的小区， 进行登记， 接入该小区。 如果不存在 sibl9, 则认为此小区是普通公网小区， 无法进行集群业务， 不做 登记处理。
登记后， 第一监听单元可利用接收到的 sibl9中包含的组 ID信息， 计算 TPCH的接收周期和时刻 , 并以扰码 TP-rnti对 TPCH进行监听。
尽管为示例目的， 已经公开了本发明的优选实施例， 本领域的技术人员 将意识到各种改进、 增加和取代也是可能的， 因此， 本发明实施例的范围应 当不限于上述实施例。
工业实用性
本发明实施例的技术方案以原 LTE系统为基础， 在集群 UE端增加了逻 辑信道， 并对逻辑信道的功能重新划分， 实现了集群 UE对其它集群 UE的 组呼过程， 实现了点对多点通话的集群业务功能， 避免建立多个专用承载， 节省了空口物理资源， 同时又能快速响应被叫业务， 满足了 LTE集群业务通 讯需求。

Claims

权 利 要 求 书
1、 一种基于长期演进 LTE的集群业务实现方法， 包括：
建立集群寻呼信道 TPCH;
第一终端发起组呼后， 网络侧相应地建立集群组控制信道 TGCCH和集 群组业务信道 TGTCH, 并通过 TGCCH下发 TGTCH的配置信息；
第二终端通过所述 TPCH监听到第一终端的组呼消息， 对所述 TGCCH 进行监听以获得所述配置信息；
基于所述配置信息， 第二终端建立本地 TGTCH 承载以监听所述 TGTCH;
其中， 所述第一终端和所述第二终端为集群用户终端。
2、 如权利要求 1所述的基于 LTE的集群业务实现方法， 其中， 所述第 二终端处于所述第一终端所在的小区， 在所述第二终端通过所述 TPCH监听 到所述第一终端的组呼消息时获得一扰码， 以对所述 TGCCH进行监听以获 得所述配置信息。
3、 如权利要求 1所述的基于 LTE的集群业务实现方法， 其中， 所述第 二终端处于所述第一终端所在小区之外的小区， 在所述第二终端通过所述 TPCH监听到所述第一终端的组呼消息后， 所述第二终端对所述组呼消息进 行响应以获得一扰码， 以对所述 TGCCH进行监听以获得所述配置信息。
4、 如权利要求 2或 3所述的基于 LTE的集群业务实现方法， 其中， 所 述第二终端基于相同的扰码监听所述 TGCCH和 TGTCH。
5、 如权利要求 4所述的基于 LTE的集群业务实现方法， 其中， 所述扰 码为集群无线网络标识 T-mti。
6、 如权利要求 1所述的基于 LTE的集群业务实现方法， 其中， 网络侧 在广播控制信道 BCH上下发集群系统信息， 当集群用户终端读取到集群系 统信息后， 登记到对应的小区。
7、 如权利要求 6所述的基于 LTE的集群业务实现方法， 其中， 所述集 群系统信息为系统信息块 sibl9, 并且在 sibl9中包含所述 TPCH的寻呼周期 的信息。
8、 如权利要求 7所述的基于 LTE的集群业务实现方法， 其中， 集群用 的寻呼周期， 且以集群呼叫无线网络标识 TP-rnti对所述 TPCH进行监听。
9、 一种基于长期演进 LTE的集群用户终端， 包括：
第一监听单元， 设置为监听集群寻呼传输信道 TPCH;
组呼请求单元， 设置为发起组呼；
第二监听单元， 设置为当所述第一监听单元通过所述 TPCH监听到一组 呼消息后， 监听网络侧的集群组控制信道 TGCCH, 以获得在所述 TGCCH 上下发的集群组业务信道 TGTCH的配置信息；
第三监听单元， 设置为基于所述配置信息建立本地 TGTCH承载以监听 所述 TGTCH。
10、如权利要求 9所述的基于 LTE的集群用户终端， 还包括组呼响应单 元， 设置为当本集群用户终端处于发起组呼的集群用户终端所在小区之外的 小区时， 在所述第一监听单元通过所述 TPCH监听到一组呼消息后， 所述组 呼响应单元对所述组呼消息进行响应以获得一扰码， 以对所述 TGCCH进行 监听以获得所述配置信息。
11、 如权利要求 9所述的基于 LTE的集群用户终端， 其中， 当本集群用 户终端处于发起组呼的集群用户终端所在的小区时， 所述第二监听单元在所 述第一监听单元通过所述 TPCH监听到一组呼消息时获得一扰码， 以对所述 TGCCH进行监听以获得所述配置信息。
12、 如权利要求 10或 11所述的基于 LTE的集群用户终端， 其中， 所述 第二监听单元和所述第三监听单元基于相同的扰码分别监听所述 TGCCH和 所述 TGTCH。
13、 如权利要求 12所述的基于 LTE的集群用户终端， 其中， 所述扰码 为集群无线网络标识 T-rnti。
14、如权利要求 9所述的基于 LTE的集群用户终端， 还包括登记处理单 元， 设置为读取网络侧在广播控制信道 BCH上下发的集群系统信息， 当读 取到集群系统信息后， 所述登记处理单元将本集群用户终端登记到对应的小 区。
15、 如权利要求 14所述的基于 LTE的集群用户终端， 其中， 所述集群 系统信息为系统信息块 sibl9, 并且在 sibl9中包含所述 TPCH的寻呼周期的 信息。
16、 如权利要求 15所述的基于 LTE的集群用户终端， 其中， 集群用户 终端以所述 sibl9中包含的所述 TPCH的寻呼周期的信息， 计算所述 TPCH 的寻呼周期， 且以集群呼叫无线网络标识 TP-rnti对所述 TPCH进行监听。
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US9642115B2 (en) 2017-05-02
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