WO2009143678A1 - 一种移动台中继通信系统及方法 - Google Patents

一种移动台中继通信系统及方法 Download PDF

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Publication number
WO2009143678A1
WO2009143678A1 PCT/CN2008/072168 CN2008072168W WO2009143678A1 WO 2009143678 A1 WO2009143678 A1 WO 2009143678A1 CN 2008072168 W CN2008072168 W CN 2008072168W WO 2009143678 A1 WO2009143678 A1 WO 2009143678A1
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WO
WIPO (PCT)
Prior art keywords
mobile station
network
communication system
communication
relay
Prior art date
Application number
PCT/CN2008/072168
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English (en)
French (fr)
Inventor
胡易木
程微
罗忠生
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP08800681.2A priority Critical patent/EP2293465A4/en
Priority to US12/994,577 priority patent/US20110134811A1/en
Publication of WO2009143678A1 publication Critical patent/WO2009143678A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a mobile station relay communication system and method.
  • the transmission mode in the mobile communication system is duplex transmission, which is further divided into two modes: Frequency Division Duplex (FDD) and Time Division Duplex (Time Division Duplex).
  • FDD Frequency Division Duplex
  • Time Division Duplex Time Division Duplex
  • Frequency division duplex FDD requires two independent channels for operation. One channel is used to transmit information downwards and the other channel is used to transmit information upwards. There is a guard band between the two channels to prevent mutual interference between adjacent transmitters and receivers.
  • Time division duplex TDD requires only one channel. This same channel is used regardless of whether the information is transmitted down or up. Since the transmitter and receiver do not operate at the same time, there is no possibility of interference between them.
  • Most of the mobile communication systems used in the early stage are frequency division duplex mode, such as GSM, CDMA, etc., receiving and transmitting different frequency bands, and the mobile stations are connected to each other through a wireless interface.
  • the off-net mobile station can implement relay communication by forwarding data on the network mobile station.
  • time-division duplex transmission modes in the mobile communication that have the characteristics of transmitting and receiving the same frequency (the receiving and transmitting of the mobile station are in the same frequency band, but the receiving and transmitting parts of the mobile station can be at the same or different frequency points when working), such as Time division synchronous code division multiple access TD-SCDMA, the mobile station can realize complete two-way point-to-point communication by using the transmission mode.
  • TD-SCDMA Time division synchronous code division multiple access
  • the technical problem to be solved by the present invention is to provide a mobile station relay communication system and method for forwarding a mobile terminal in a network as a relay device to an off-network mobile station by establishing a communication connection between the network mobile station and the non-network mobile station. Data, to achieve non-network mobile station relay communication, and no need to add other wireless interfaces.
  • the present invention provides a mobile station relay communication system, including: at least one in-network mobile station, at least one off-net mobile station, and at least one mobile station communication system; In the mobile station communication system, and as a relay device between the mobile station communication system and the off-net mobile station, for applying for resources to the mobile station communication system, and moving to the out-of-network The station forwards the data;
  • the off-net mobile station is in communication with the in-network mobile station for receiving forwarding data of the in-network mobile station to implement relay communication with the mobile station communication system.
  • the transmission of the mobile station relay communication system uses a time division duplex mode with a function of transmitting and receiving the same frequency.
  • the present invention also provides a mobile station relay communication system, including: at least one in-network mobile station, at least one off-net mobile station, and at least one mobile station communication system;
  • the mobile station communication system transmits data in a mode of transmitting and receiving the same frequency
  • the inactive network mobile station is in communication connection with the mobile station in the network;
  • the in-network mobile station is configured to forward the connected off-net mobile station and the mobile station communication system Data exchanged between the systems.
  • the in-network mobile station is further configured to apply for a resource to the mobile station communication system after establishing a communication connection with the non-network mobile station; and perform data interaction with the non-network mobile station on the applied resource.
  • non-network mobile stations when there are multiple non-network mobile stations, a plurality of non-network mobile station communication connections, at least one of which is not in the network mobile station and the in-network mobile station.
  • the mobile station relay communication system transmits data by using a time division duplex mode of transmitting and receiving the same frequency.
  • the present invention also provides a mobile station relay communication method, including:
  • the mobile station communication system transmits data in a mode of transmitting and receiving the same frequency; the non-network mobile station is in communication connection with the mobile station in the network, and the mobile station in the network forwards the interaction between the connected inactive mobile station and the mobile station communication system. data.
  • the mobile station relay communication method includes the following steps:
  • the network mobile station applies for resources to the mobile station communication system
  • the network mobile station as a relay device forwards data exchanged between the connected off-network mobile station and the mobile station communication system.
  • the mobile station relay communication method includes the following steps:
  • the network mobile station applies for resources to the mobile station communication system
  • the in-network mobile station acts as a relay device to forward data to the off-net mobile station.
  • step of establishing the communication connection between the network mobile station and the non-network mobile station further includes the following steps:
  • Al Establish multiple communication connections between mobile stations that are not in the network.
  • the method further includes the following steps:
  • the relay communication is not implemented in the mobile station of the network. Further, the in-network mobile station establishes a synchronous communication connection with at least one of the in-network mobile stations; and the out-of-network mobile station establishes a synchronous communication connection with at least one of the in-network mobile stations.
  • the mobile station relay communication system and method provided by the present invention use a method of establishing a communication connection between a network mobile station and an off-network mobile station, and a time division duplex transmission mode having the function of transmitting and receiving the same frequency,
  • the mobile station in the network acts as a relay device to forward data to the non-network mobile station, and realizes the relay communication of the non-network mobile station.
  • the mobile station relay communication system hardware does not need to add other wireless interfaces, the structure is relatively simple, and the cost increases little; It is also relatively stable and reliable.
  • FIG. 1 is a schematic diagram of a basic mobile communication system of the present invention
  • FIG. 2 is a schematic diagram of a synchronous communication connection between an in-network mobile station and a plurality of in-network mobile stations according to the present invention
  • FIG. 3 is a schematic diagram of a synchronous communication connection between an off-net mobile station and a plurality of in-network mobile stations according to the present invention
  • Relay mobile station relay communication diagram Relay mobile station relay communication diagram.
  • the basic communication situation of the present invention is illustrated in Figure 1, which includes two or more mobile stations, and a mobile station communication system accessible to the mobile station.
  • the mobile station communication system may have multiple selections for the mobile station, and the mobile station may selectively access the desired mobile station communication system.
  • the mobile station is further divided into an in-network mobile station and an out-of-network mobile station according to whether it is connected to the mobile station communication system, and the mobile station accessing the mobile station communication system is called an in-network mobile station, and does not have access to the mobile station communication system.
  • the station is called an out-of-network mobile station.
  • the mobile station communication system uses a time-division duplex mode with the same frequency-transmitting characteristic mode, such as transmitting and receiving the same frequency, to transmit system information, that is, the receiving and transmitting of the mobile station are in the same frequency band.
  • the transmitted signal of the mobile station can be demodulated by other mobile stations.
  • the present invention provides a mobile station relay communication system, including: at least one in-network mobile station, at least one off-net mobile station, and at least one mobile station communication system;
  • the mobile station communication system transmits data in a mode of transmitting and receiving the same frequency;
  • the inactive network mobile station is in communication connection with the mobile station in the network, and is configured to perform data interaction with the mobile station communication system by the connected in-network mobile station;
  • the in-network mobile station accesses the mobile station communication system, and is used as a relay device between the mobile station communication system and the off-net mobile station, and forwards the connected off-network mobile station and station Data that interacts between mobile station communication systems.
  • the data exchanged between the connected mobile station and the mobile station communication system by the mobile station in the network specifically refers to: forwarding the received mobile station communication system to the data of the non-network mobile station to the absent The network mobile station; forwards the received data sent by the non-network mobile station to the mobile station communication system to the mobile station communication system.
  • the in-network mobile station is further configured to apply for a resource to the mobile station communication system after establishing a communication connection with the non-network mobile station; and perform data interaction with the non-network mobile station on the applied resource.
  • some communication resources are not used.
  • these unused communication resources mainly include frequencies, time slots, spreading codes, and the like, and combinations thereof. It is managed and distributed by the mobile station communication system to support direct communication between mobile stations. It should be noted that in the direct communication resources allocated to the mobile station, the frequency range does not exceed the transmitting and receiving frequency bands of the mobile station.
  • the mobile station's transmit power and receiving sensitivity are higher than the general short-range communication system.
  • the system resources are sufficient, not only can the two-way mobile station voice double-talking be realized, but also the mobile station between the mobile stations can be realized.
  • Distance data point-to-point transmission breaking the distance limitation of technologies such as Bluetooth; at the same time, the mobile station relay communication system hardware does not need to add other wireless interfaces, the structure is relatively simple, and the cost increase is small; the transmission quality is also relatively stable and reliable.
  • the situation initiated by the mobile station on the network may be: When some mobile stations are not in the network, the mobile station communication system cannot page to the destination, and there must be a process of synchronous search.
  • the system communication protocol specifies specific synchronization search resources, such as delineating frequency points, spreading codes, and the like.
  • the non-network mobile station broadcasts on the synchronous search resource specified by the protocol (which carries the device identifier of the mobile station), and when the mobile station communication system cannot page to the destination party, the mobile station on the network Searching for the synchronous search resource specified by the protocol, if a non-network mobile station whose device identifier matches the paging destination is found, a communication connection is established therewith.
  • a mobile station When a mobile station does not access the mobile station communication system, that is, the mobile station is not in use, and the mobile station in the network does not need to access, first establish an airborne wireless interface communication connection with the mobile station on the network; specifically, it may include: The station broadcasts (in which the device identification of the mobile station is carried); when the mobile station is not able to access the network, the signal in the broadcast channel is searched for, and the mobile station on the network that can be connected is obtained, and then a mobile station in the network is selected. To make a communication connection; you can specify a selection strategy according to actual needs, such as picking the first searched mobile station on the network, or picking the nearest mobile station on the network.
  • the mobile station in the network applies for obtaining the direct communication resource of the mobile station by applying to the mobile station communication system, and the mobile station in the network applies for the direct communication resource of the mobile station.
  • the relay device forwards the data sent by the mobile station communication system to the non-network mobile station to the non-network mobile station, and forwards the data not sent by the network mobile station to the mobile station communication system to the mobile station communication system;
  • Certain services of the mobile communication system such as voice calls, also support communication between the mobile terminal and the non-network mobile station, such as transmitting data.
  • the communication connection between the mobile stations After the establishment of the communication connection between the mobile stations, whether or not the mobile station of the network needs to communicate with the communication system of the mobile station, the communication connection between the mobile station of the network and the communication system of the mobile station is maintained, and necessary information such as control signaling is transmitted. Therefore, when the resources of the mobile station communication system are sufficient, when the mobile station performs cell switching or the like, the communication connection between the mobile stations remains.
  • the network mobile station can also establish a synchronous communication connection with multiple non-network mobile stations, as shown in FIG. 2, and the non-network mobile station can also establish a synchronous communication connection with multiple mobile stations on the network, as shown in FIG.
  • this does not mean that a mobile station must be able to transmit voice, data, etc. simultaneously with multiple mobile stations.
  • the direct communication resources of the mobile stations used between them and the mobile communication stations used by the other groups of the connected mobile stations and the mobile stations not connected to the network are the most direct communication resources. Good (but not limited to) not the same.
  • a method for performing synchronous search based on a specific synchronous search resource specified by the mobile station communication system communication protocol may be used to sequentially connect a plurality of the non-network mobile stations to form a level. a communication connection, a plurality of said non-network mobile stations passing one or more The network mobile station relay mode selectively accesses the required mobile station communication system, as shown in FIG.
  • relay mobile station relay communication that is, a plurality of non-network mobile station communication connections, at least one of which is not in the network mobile station and
  • the step of the network mobile station communication connection (“multiple communication networks are not established between the mobile stations", and the steps of "establishing a communication connection with the mobile station in the network" are in no particular order, and even can be interspersed);
  • the mobile station can also be used as a relay; resources that are not directly communicated between the mobile stations of the network also need to be obtained from the mobile station communication system.
  • the wireless communication interface between the in-network mobile station and the off-net mobile station, the in-network mobile station and the mobile station communication system, the off-net mobile station, and the off-net mobile station may be the same or Different, but when the communication wireless interfaces are the same, resources such as frequency points, spreading codes, and time slots in the mobile communication system may be different to avoid interference between each other.
  • the communication between the mobile station and the mobile station, and between the mobile station and the mobile station communication system includes voice, data service, etc., and the specific service support type depends on the resource status of the mobile station communication system.
  • the mobile station relay communication system uses the time division duplex mode with the function of transmitting and receiving the same frequency to transmit data.
  • the present invention also provides a method for performing mobile station relay communication in the mobile station relay communication system, including:
  • the mobile station communication system transmits data in a mode of transmitting and receiving the same frequency; the non-network mobile station is in communication connection with the mobile station in the network, and the mobile station in the network forwards the interaction between the connected inactive mobile station and the mobile station communication system. data.
  • the method specifically includes:
  • the network mobile station applies for resources to the mobile station communication system
  • the network mobile station as a relay device forwards data exchanged between the connected non-network mobile station and the mobile station communication system.
  • step A may further include:
  • the method may further include:
  • the relay communication is not implemented in the mobile station of the network.
  • the present invention employs a method of establishing a communication connection between a network mobile station and an off-net mobile station, between a network mobile station and a mobile station communication system, and a time division duplex transmission mode having a function of transmitting and receiving the same frequency.
  • the mobile station in the network acts as a relay device to forward data to the mobile station not in the network, thereby implementing the relay communication of the mobile station not in the network.
  • the mobile station relay communication system hardware does not need to add other wireless interfaces, the structure is relatively simple, and the cost increases little; the transmission quality is also relatively stable and reliable.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Description

一种移动台中继通信系统及方法
技术领域
本发明涉及移动通信领域， 尤其涉及一种移动台中继通信系统及方法。
背景技术
目前移动通信系统中的传输方式为双工传输， 其又分为频分双工 FDD ( Frequency Division Duplex )、 时分双工 TDD ( Time Division Duplex )两种 模式。
频分双工 FDD, 操作时需要两个独立的信道。 一个信道用来向下传送信 息， 另一个信道用来向上传送信息。 两个信道之间存在一个保护频段， 以防 止邻近的发射机和接收机之间产生相互干扰。
时分双工 TDD, 只需要一个信道。 无论向下还是向上传送信息都釆用这 同一个信道。 因为发射机和接收机不会同时操作， 它们之间不可能产生干扰。 在移动通信系统中前期釆用的大多数是频分双工模式，比如 GSM、 CDMA等， 接收和发射釆用不同频段， 移动台之间通过无线接口相互连接。
在实际当中有很多移动台受地理位置的影响而无法接收到网络信号， 即 由于网络覆盖等原因无法接入通信系统，我们称该类移动台为不在网移动台。 该不在网移动台可以通过在网移动台转发数据实现中继通信。
目前移动通信中出现的具有收发同频（指移动台的接收和发射处于相同 频段， 但是移动台的接收和发射部分在工作时可以处于相同或不同频点）特 性的时分双工传输模式， 如时分同步码分多址 TD-SCDMA, 移动台釆用该传 输模式可以实现完全双向点对点通信。
目前有关记载移动台作为中继设备技术的有关文献有现有： 1、 专利文献 专利申请号为 200480038113.5 的中国专利申请"利用移动台作为中继站提供 持续无线连接的方法和系统" ， 该专利文献所披露的技术方案存在着以下不 足： 移动台需要与至少第一节点和第二节点保持同时通信以接入蜂窝通信系 统， 即移动台必须在网， 但在实际中还有大量的移动台无法接入通信系统， 这就限制了该技术的应用， 不能为不在网移动台提供中继服务； 2、 专利文献 专利申请号为 01823899.8 的中国专利申请 "使用具有中继功能的移动台的 移动通信网以及用于奖励移动台的中继活动的方法" ， 该专利文献所披露的 技术存在着以下缺陷： 该文献中所述的 GSM系统不具备收发同频特性，移动 台不能直接接收其他移动台发射的无线信号， 必须增加第二无线接口。 这增 加了移动台成本， 且结构也更加复杂， 使移动台之间点对点通信受到很大的 限制。
因此， 现有技术有待于改进与发展。
发明内容
本发明要解决的技术问题是提供一种移动台中继通信系统及方法， 通过 建立在网移动台与不在网移动台间的通讯连接， 将在网移动台作为中继设备 向不在网移动台转发数据， 实现不在网移动台中继通信， 并且无须增加其他 无线接口。
为了解决上述技术问题， 本发明提供了一种移动台中继通信系统， 包括： 至少一在网移动台、 至少一不在网移动台、 以及至少一移动台通信系统； 所述在网移动台， 处于所述移动台通信系统中， 且在所述移动台通信系 统与所述不在网移动台之间用作中继设备， 用于向所述移动台通信系统申请 资源， 并向所述不在网移动台转发数据；
所述不在网移动台， 与所述在网移动台相通讯连接， 用于接收所述在网 移动台的转发数据， 以实现与所述移动台通信系统的中继通信。
进一步的， 所述移动台中继通信系统的传输釆用具有收发同频功能的时 分双工模式。
本发明还提供了一种移动台中继通信系统， 包括： 至少一在网移动台、 至少一不在网移动台、 以及至少一移动台通信系统；
所述移动台通信系统釆用收发同频的模式传输数据；
所述不在网移动台与在网移动台相通讯连接；
所述在网移动台， 用于转发所连接的不在网移动台和所述移动台通信系 统之间交互的数据。
进一步的， 所述在网移动台还用于与不在网移动台建立通讯连接后， 向 所述移动台通信系统申请资源； 在所申请到的资源上与所述不在网移动台进 行数据交互。
进一步的， 当存在多个不在网移动台时， 多个不在网移动台间通讯连接， 其中至少一个不在网移动台与在网移动台通讯连接。
进一步的， 所述移动台中继通信系统釆用收发同频的时分双工模式传输 数据。
本发明还提供了一种移动台中继通信方法， 包括：
移动台通信系统釆用收发同频的模式传输数据； 不在网移动台与在网移 动台相通讯连接， 在网移动台转发所连接的不在网移动台和所述移动台通信 系统之间交互的数据。
进一步的， 所述的移动台中继通信方法包括以下步骤：
81、 建立所述在网移动台与所述不在网移动台间的通讯连接；
82、 所述在网移动台向所述移动台通信系统申请资源；
83、 所述在网移动台作为中继设备转发所连接的不在网移动台和所述移 动台通信系统之间交互的数据。
进一步的， 所述的移动台中继通信方法包括以下步骤：
A、 建立所述在网移动台与所述不在网移动台间的通讯连接；
B、 所述在网移动台向所述移动台通信系统申请资源；
C、 所述在网移动台作为中继设备向不在网移动台转发数据。
进一步的， 所述建立所述在网移动台与所述不在网移动台间的通讯连接 的步骤中， 还包括步骤：
Al、 建立多个不在网移动台之间的通讯连接。
进一步的， 所述步骤 C之后还包括步骤：
D、 不在网移动台实现中继通信。 进一步的， 所述在网移动台与至少一个所述不在网移动台建立同步通讯 连接； 所述不在网移动台与至少一个所述在网移动台建立同步通讯连接。
本发明所提供的一种移动台中继通信系统及方法， 由于釆用了建立在网 移动台与不在网移动台间的通讯连接， 以及具有收发同频功能的时分双工传 输模式的方法， 使在网移动台作为中继设备向不在网移动台转发数据， 实现 了不在网移动台中继通信， 同时所述移动台中继通信系统硬件无需增加其他 无线接口， 结构相对简单， 成本增加小； 传输质量也比较稳定可靠。
附图概述
图 1为本发明的基本移动通信系统示意图；
图 2为本发明的在网移动台与多个不在网移动台同步通讯连接示意图； 图 3为本发明的不在网移动台与多个在网移动台同步通讯连接示意图； 图 4为本发明的接力移动台中继通信示意图。
本发明的较佳实施方式
下面将结合附图及实施例对本发明的技术方案进行更详细的说明。
本发明的基本通信情况如图 1所示， 其包括两个或两个以上移动台， 以 及移动台所能接入的移动台通信系统。 所述移动台通信系统可以有多个供移 动台选择， 移动台可以选择性接入所需的移动台通信系统。 移动台根据是否 接入移动台通信系统， 又分为在网移动台与不在网移动台， 接入移动台通信 系统的移动台称为在网移动台， 而没有接入移动台通信系统的移动台称为不 在网移动台， 该移动台通信系统釆用具有收发同频特性模式一一比如收发同 频的时分双工模式——传递系统信息，即移动台的接收和发射处于同一频段， 在一定范围内， 移动台的发射信号可以由其他移动台接收解调。
本发明提供了一种移动台中继通信系统， 包括： 至少一在网移动台、 至 少一不在网移动台、 以及至少一移动台通信系统；
所述移动台通信系统釆用收发同频的模式传输数据； 所述不在网移动台与在网移动台相通讯连接， 用于通过所连接的在网移 动台与所述移动台通信系统进行数据交互；
所述在网移动台， 接入所述移动台通信系统， 用于在所述移动台通信系 统与所述不在网移动台之间用作中继设备， 转发所连接的不在网移动台和所 述移动台通信系统之间交互的数据。
所述在网移动台转发所连接的不在网移动台和所述移动台通信系统之间 交互的数据具体是指： 将所收到的移动台通信系统发给不在网移动台的数据 转发给不在网移动台； 将所收到的不在网移动台发给移动台通信系统的数据 转发给移动台通信系统。
所述在网移动台还用于与不在网移动台建立通讯连接后， 向所述移动台 通信系统申请资源；在所申请到的资源上与所述不在网移动台进行数据交互。
在一个或相邻几个小区范围内， 总有部分通讯资源未被使用， 对于典型 的蜂窝式通讯系统， 这些未使用的通讯资源， 主要包含频率、 时隙、 扩频码 等及其组合， 由移动台通信系统管理、 分配， 用来支持移动台之间直接通讯。 需要注意的是， 分配给移动台的直接通讯资源中， 频点范围并未超过移动台 的收发频段。
蜂窝式通讯系统中， 移动台发射功率和接收灵敏度均高于一般的短距通 信系统， 当系统资源充足时， 不仅可以实现不在网移动台语音双向通话， 而 且可以实现不在网移动台间的中距离数据点对点传输， 突破蓝牙等技术的距 离限制； 同时所述移动台中继通信系统硬件无需增加其他无线接口， 结构相 对简单， 成本增加小； 传输质量也比较稳定可靠。
在网移动台与不在网移动台建立通讯连接包括两种情况： 一种是在网移 动台发起的； 另一种是不在网移动台发起的。
在网移动台发起的情况可以是： 当部分移动台不在网时， 所述移动台通 信系统无法寻呼到目的方， 必须有一个同步搜索的过程。 为使整个通讯系统 的稳定， 系统通讯协议规定特定的同步搜索资源， 如划定频点， 扩频码等范 围。 不在网移动台在所述协议规定的同步搜索资源上进行广播（其中携带本 移动台的设备标识） ， 当移动台通信系统无法寻呼到目的方时， 在网移动台 搜索所述协议规定的同步搜索资源， 如果找到设备标识与寻呼目的方匹配的 不在网移动台， 则与其建立通讯连接。
当一方移动台没有接入移动台通信系统， 即不在网移动台， 该不在网移 动台需要接入时， 首先与在网移动台建立空中无线接口通讯连接； 具体来说 可以包括： 在网移动台进行广播（其中携带本移动台的设备标识） ； 不在网 移动台当无法接入网络时， 搜索广播信道中的信号， 得到其能够连接的在网 移动台， 然后从中挑选一在网移动台进行通讯连接； 可以根据实际需要规定 某种挑选策略， 如挑选第一个搜索到的在网移动台， 或挑选距离最近的在网 移动台等。
不在网移动台与在网移动台的通讯连接确立后， 在网移动台通过向移动 台通信系统申请获得移动台直接通讯资源， 所述在网移动台申请到所述移动 台直接通讯资源后作为中继设备向不在网移动台转发移动台通信系统发给该 不在网移动台的数据， 并且将不在网移动台发给移动台通信系统的数据转发 给移动台通信系统； 支持不在网移动台与移动台通信系统某些业务， 如语音 呼叫等， 同时也支持在网移动台与不在网移动台之间的通讯， 如传送数据。 建立移动台间通讯连接后， 无论不在网移动台是否需要与移动台通信系统通 信， 在网移动台与移动台通信系统之间都保持通讯连接， 传递必要信息， 如 控制信令等。 因此， 当移动台通信系统的资源足够， 在网移动台进行小区切 换等操作时， 移动台之间的通讯连接仍然保持。
在网移动台还可以与多个不在网移动台建立同步通讯连接，如图 2所示， 同时， 不在网移动台也可与多个在网移动台建立同步通讯连接， 如图 3所示。 但这并不意味着一台移动台一定可以与多台移动台同时进行语音、 数据等传 送。
对于彼此相连的在网移动台和不在网移动台， 它们之间所使用的移动台 直接通讯资源， 和另一组彼此相连的在网移动台和不在网移动台所使用的移 动台直接通讯资源最好（但不限于） 不相同。
当有多个不在网移动台时， 可以釆用基于所述移动台通信系统通讯协议 规定的特定同步搜索资源进行同步搜索的方法， 将多个所述不在网移动台顺 次通讯连接， 形成级联通讯连接， 多个所述不在网移动台通过一个或多个在 网移动台中继方式选择性地接入所需移动台通信系统， 如图 4所示， 形成接 力移动台中继通信， 即： 多个不在网移动台间通讯连接， 其中至少一个不在 网移动台与在网移动台通讯连接（ "多个不在网移动台间建立通讯连接" 的 步骤， 和 "与在网移动台建立通讯连接" 的步骤不分先后， 甚至可以穿插进 行） ； 此时， 不在网移动台也可以用作中继； 两个不在网移动台间直接通讯 的资源也需要向移动台通信系统申请来获得。
所述在网移动台与所述不在网移动台、 所述在网移动台与所述移动台通 信系统、 所述不在网移动台与所述不在网移动台之间的无线通讯接口可以相 同或不同， 但当该通讯无线接口相同时， 所述移动台通信系统内部的频点、 扩频码、 时隙等资源可以不一样， 以避免彼此间的干扰。
所述移动台与移动台间、 移动台与移动台通信系统间的通讯包括语音、 数据业务等， 具体的业务支持种类视移动台通信系统资源状况而定。
可选的， 所述移动台中继通信系统釆用具有收发同频功能的时分双工模 式传输数据。
本发明还提供了一种在上述移动台中继通信系统中进行移动台中继通信 的方法， 包括：
移动台通信系统釆用收发同频的模式传输数据； 不在网移动台与在网移 动台相通讯连接， 在网移动台转发所连接的不在网移动台和所述移动台通信 系统之间交互的数据。
可选的， 该方法具体包括：
A、 建立所述在网移动台与所述不在网移动台间的通讯连接；
B、 所述在网移动台向所述移动台通信系统申请资源；
C、所述在网移动台作为中继设备转发所连接的不在网移动台和所述移动 台通信系统之间交互的数据。
可选的， 步骤 A中还可以包括：
Al、 建立多个不在网移动台之间的通讯连接。 可选的， 所述步骤 C之后还可以包括：
D、 不在网移动台实现中继通信。
方法中的各实现细节同上文系统中所述， 这里不再重复。
本发明的具体实施方式并不限于此， 对本领域的普通技术人员来说， 可 以根据本发明的方法及其构思进行相应的等同改变或替换， 而所有这些改变 或替换， 都应属于本发明的保护范围之内。 因此， 不能将上述具体实施例理 解为对本发明专利保护范围的限制， 本发明专利保护范围应以所附权利要求 为准。
工业实用性 本发明由于釆用了建立在网移动台与不在网移动台间、 在网移动台与移 动台通信系统间的通讯连接， 以及具有收发同频功能的时分双工传输模式的 方法， 在网移动台作为中继设备向不在网移动台转发数据， 实现不在网移动 台中继通信。 同时所述移动台中继通信系统硬件无需增加其他无线接口， 结 构相对简单， 成本增加小； 传输质量也比较稳定可靠。

Claims

权 利 要 求 书
1、 一种移动台中继通信系统， 包括： 至少一在网移动台、 至少一不在网 移动台、 以及至少一移动台通信系统；
所述在网移动台， 处于所述移动台通信系统中， 且在所述移动台通信系 统与所述不在网移动台之间用作中继设备， 用于向所述移动台通信系统申请 资源， 并向所述不在网移动台转发数据；
所述不在网移动台， 与所述在网移动台相通讯连接， 用于接收所述在网 移动台的转发数据， 以实现与所述移动台通信系统的中继通信。
2、 根据权利要求 1所述的移动台中继通信系统，其特征在于， 所述移动 台中继通信系统的传输釆用具有收发同频功能的时分双工模式。
3、 一种移动台中继通信系统， 包括： 至少一在网移动台、 至少一不在网 移动台、 以及至少一移动台通信系统；
所述移动台通信系统釆用收发同频的模式传输数据；
所述不在网移动台与在网移动台相通讯连接；
所述在网移动台， 用于转发所连接的不在网移动台和所述移动台通信系 统之间交互的数据。
4、 根据权利要求 3所述的移动台中继通信系统， 其特征在于： 所述在网移动台还用于与不在网移动台建立通讯连接后， 向所述移动台 通信系统申请资源；在所申请到的资源上与所述不在网移动台进行数据交互。 5、 根据权利要求 3或 4所述的移动台中继通信系统， 其特征在于： 当存在多个不在网移动台时， 多个不在网移动台间通讯连接， 其中至少 一个不在网移动台与在网移动台通讯连接。
6、 根据权利要求 3到 5中任一项所述的移动台中继通信系统，其特征在 于： 所述移动台中继通信系统釆用收发同频的时分双工模式传输数据。 7、 一种移动台中继通信方法， 包括： 移动台通信系统釆用收发同频的模式传输数据； 不在网移动台与在网移 动台相通讯连接， 在网移动台转发所连接的不在网移动台和所述移动台通信 系统之间交互的数据。
8、 一种根据权利要求 7所述的移动台中继通信方法，其特征在于， 包括 以下步骤：
81、 建立所述在网移动台与所述不在网移动台间的通讯连接；
82、 所述在网移动台向所述移动台通信系统申请资源；
83、 所述在网移动台作为中继设备转发所连接的不在网移动台和所述移 动台通信系统之间交互的数据。 9、 根据权利要求 7所述的移动台中继通信方法，其特征在于， 包括以下 步骤：
A、 建立所述在网移动台与所述不在网移动台间的通讯连接；
B、 所述在网移动台向所述移动台通信系统申请资源；
C、 所述在网移动台作为中继设备向不在网移动台转发数据。 10、 根据权利要求 8或 9所述的方法， 其特征在于， 所述建立所述在网 移动台与所述不在网移动台间的通讯连接的步骤中， 还包括步骤：
Al、 建立多个不在网移动台之间的通讯连接。
11、 根据权利要求 9所述的方法， 其特征在于， 所述步骤 C之后 还包括步骤：
D、 不在网移动台实现中继通信。
12、 根据权利要求 9到 11中任一项所述的方法， 其特征在于： 所述在网移动台与至少一个所述不在网移动台建立同步通讯连接； 所述 不在网移动台与至少一个所述在网移动台建立同步通讯连接。
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