WO2015014235A1 - 一种通信模式切换方法和装置 - Google Patents

一种通信模式切换方法和装置 Download PDF

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Publication number
WO2015014235A1
WO2015014235A1 PCT/CN2014/082925 CN2014082925W WO2015014235A1 WO 2015014235 A1 WO2015014235 A1 WO 2015014235A1 CN 2014082925 W CN2014082925 W CN 2014082925W WO 2015014235 A1 WO2015014235 A1 WO 2015014235A1
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WO
WIPO (PCT)
Prior art keywords
relay
mode
threshold
unit
downlink channel
Prior art date
Application number
PCT/CN2014/082925
Other languages
English (en)
French (fr)
Inventor
徐燕
谢汉雄
张颖哲
罗正华
Original Assignee
海能达通信股份有限公司
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 海能达通信股份有限公司 filed Critical 海能达通信股份有限公司
Priority to EP14832697.8A priority Critical patent/EP3029987B1/en
Priority to US14/908,090 priority patent/US9814041B2/en
Publication of WO2015014235A1 publication Critical patent/WO2015014235A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • 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
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of communications, and in particular, to a communication mode switching method and apparatus.
  • the repeater When the mobile station and the repeater work in the fast-activated repeater mode, the repeater is in an abnormal state when there is no signal to be transferred. Meanwhile, in general, any signal transmitted by the mobile station in the range of the repeater signal may be transferred.
  • the station wakes up to the working state, synchronizes the timing of the relay station to the mobile station, and then performs the signal of the relay mobile station. In this case, the process of base station activation is not required, so that the call access time can be greatly reduced.
  • the mobile station cannot know the current state of the relay station in advance before acquiring the transmission request for transmission. If the relay station is currently in an abnormal state, the mobile station may not be forwarded by the relay station.
  • the abnormal state includes that the repeater is in a dormant state or the distance between the mobile station and the repeater is too far, and the signal coverage is about to be exceeded.
  • the repeater When the repeater is in the sleep state, the mobile station cannot know the signal transmitted. Can successfully transmit to the repeater to wake up the repeater from the sleep state to the working state to forward the signal of this transmission; in the case of too far distance, the signal transmitted by the mobile station can not be basically received by the repeater.
  • the mobile station cannot determine whether the transmission can be successfully received and forwarded by the relay station. In this way, the mobile station may fail to transmit a signal or the transmitted signal may be lost, or a mobile station may transmit. However, other mobile stations under the same repeater cannot receive this transmission. This higher call loss rate will greatly affect the user experience.
  • the present invention provides a communication mode switching method and apparatus.
  • a communication mode switching method includes: Receiving a launch request
  • the first threshold is greater than or equal to the first threshold, determining that the repeater is in an active state, maintaining the transit mode to complete the transmitting request, where the transit mode is specifically transmitting using a transmit frequency of the uplink channel;
  • the relay station is in an abnormal state, switching to the off-network mode completes the transmission request, and the off-network mode specifically transmits the transmission frequency after adjusting the reception frequency of the downlink channel.
  • the method when detecting that the radio frequency signal strength of the downlink channel is less than the first threshold, the method further includes: transmitting an access request frame to the relay station, and monitoring whether the downlink channel has a relay signal; when detecting the transit signal, determining the location Said transfer station is in an active state, maintaining said transfer mode to complete said launch request;
  • the method before the transmitting the access request frame to the relay station and monitoring whether the downlink channel has a transit signal, the method further includes:
  • the transmitting to the relay station transmits an access request frame, and monitors whether the downlink channel has a relay signal.
  • the method when entering the hold state in the off-network mode, the method further includes:
  • the off-network mode is maintained to complete the transmission request.
  • the method when entering the hold state in the off-network mode, the method further includes:
  • the method when entering the hold state in the off-network mode, the method further includes:
  • a communication mode switching device includes:
  • Receiving a transmission request unit configured to receive a transmission request
  • a first threshold detecting unit configured to detect whether a radio frequency signal strength of the downlink channel meets a first threshold
  • a transfer mode unit configured to determine that the transfer station is in an active state when the detection result of the first threshold detection unit is greater than or equal to the first threshold, and maintain the transfer request to complete the transfer request, where the transfer mode is specifically Transmitting using the transmission frequency of the uplink channel;
  • the off-network mode unit is configured to determine that the repeater is in an abnormal state when the detection result of the first threshold detecting unit is less than the first threshold, and switch to the off-network mode to complete the transmitting request, where the off-network The mode is specifically performed after the transmission frequency is adjusted to the reception frequency of the downlink channel.
  • the method further includes:
  • a downlink channel monitoring unit configured to: when the detection result of the first threshold detecting unit is smaller than the first threshold, transmit an access request frame to the relay station, and monitor whether the downlink channel has a relay signal; and maintain the relay mode unit, And when the downlink channel monitoring unit detects the relay signal, determining that the repeater station is in an active state, and maintaining the transit mode to complete the transmitting request;
  • the switching off-network mode unit is further configured to: when the downlink channel monitoring unit does not detect the transit signal, determine that the repeater station is in an abnormal state, and switch to the off-network mode to complete the transmitting request.
  • the method further includes:
  • An uplink channel detecting unit configured to detect whether the uplink channel signal strength meets a second threshold before triggering the downlink channel monitoring unit
  • the switching off-network mode unit is further configured to: when the detection result of the uplink channel detecting unit is that the uplink channel access strength is greater than or equal to the second threshold, switch to the off-network mode to complete the transmitting request; And when the detection result of the uplink channel detecting unit is that the uplink channel access strength is less than the second threshold, transmitting an access request frame to the relay station, and monitoring whether the downlink channel has a relay signal.
  • the method further includes:
  • the first threshold detecting unit is further configured to: when the switching off-network mode unit enters the hold state after completing the transmitting request, when detecting the transmitting request, detecting whether the radio frequency signal strength of the downlink channel meets the first threshold ;
  • the switching mode unit is configured to determine that the repeater is in an active state when the detection result of the first threshold detecting unit is greater than or equal to the first threshold, and switch to the transit mode to complete the transmitting request; maintaining the off-network mode unit And determining that the repeater is in an abnormal state when the detection result of the first threshold detecting unit is less than the first threshold, and maintaining the off-network mode to complete the transmitting request.
  • the method further includes:
  • a call access unit configured to access a call when receiving a called request to call the mobile station when the handover off-network mode unit enters a hold state after completing the transmitting request
  • An end frame determining unit configured to determine, when the end frame of the called request is received, whether the end frame is a relay signal
  • the switching relay mode unit is further configured to switch to the transit mode when the determination result of the end frame determining unit is a relay signal;
  • the hold status unit is further configured to maintain the off-network mode when the determination result of the end frame determination unit is not a relay signal, and enter a hold state.
  • whether the relay station is in an abnormal state is determined by detecting whether the signal strength of the downlink channel meets a preset threshold, thereby specifically switching the working mode between the transit mode and the off-network mode, thereby When the repeater is in an abnormal state, the receiving frequency of the downlink channel is used as the transmitting frequency to transmit a signal, thereby ensuring that other mobile stations can receive the transmitted signal and reduce the call loss rate.
  • FIG. 1 is a flowchart of a method for switching a communication mode according to the present invention
  • FIG. 2 is a flow chart of another method of a communication mode switching method according to the present invention.
  • 3 is a flow chart of another method of a communication mode switching method according to the present invention.
  • 4 is a flow chart of another method of a communication mode switching method according to the present invention.
  • FIG. 5 is a structural diagram of a device of a communication mode switching apparatus according to the present invention.
  • FIG. 6 is a structural diagram of a device of a communication mode switching device according to the present invention.
  • FIG. 7 is a structural diagram of another device of a communication mode switching device according to the present invention.
  • FIG. 8 is a structural diagram of another device of a communication mode switching device according to the present invention.
  • Fig. 9 is a block diagram showing another structure of a communication mode switching device of the present invention.
  • Embodiments of the present invention provide a communication mode switching method and apparatus. First, it is determined whether the relay station is in an abnormal state by detecting whether the signal strength of the downlink channel satisfies a preset threshold, thereby specifically switching the working mode between the transit mode and the off-network mode, thereby being in an abnormal state in the repeater.
  • the receiving frequency of the downlink channel is used as the transmitting frequency to transmit the signal, thereby ensuring that other mobile stations can receive the transmitted signal and reduce the call loss rate.
  • the signal strength of the uplink channel is further determined.
  • the uplink channel signal strength is too strong, it is determined that an uplink channel signal interference occurs.
  • the success rate of transmitting the signal through the uplink channel to the relay station is very low, so the current working mode is switched to the off-network mode, thereby improving the call success rate, and transmitting the uplink channel when the uplink channel signal strength is normal.
  • the situation is analyzed for the case of continuing to transmit or receive call requests of other mobile stations, etc., and when the relay station returns to the working state, it is switched to the transit mode or the off-network mode ends the transmission. After switching to the relay mode, the transmission range is expanded as much as possible to ensure the success rate of the call.
  • FIG. 1 is a flowchart of a method for switching a communication mode according to the present invention. The method includes the following steps:
  • the so-called launch request can be thought of as the user pressing the call button of the mobile station or entering the menu.
  • a request triggered by an action such as editing of a short message, that is, the type of the transmission request includes at least a transmission request of a voice class and a text class or a signaling class.
  • the downlink channel of the mobile station under the coverage of the repeater signal can receive at least a certain carrier signal, so this It is a judgment basis for effectively judging which state the relay station is currently in.
  • the mobile station determines the current working state of the relay station according to the magnitude between the RF signal strength received by the comparison downlink channel and the preset first threshold.
  • the following steps S103 and S104 are corresponding operations for different comparison results. When the comparison result is greater than or equal to the first threshold, the process proceeds to step S103; if the comparison result is less than the first threshold, then the process proceeds to step S104.
  • the fast-activated repeater mode is a way for a mobile station to establish a timing relationship when using a base station for communication, that is, when using a base station for communication, if the base station does not currently transmit, the base station downlink channel can also be used.
  • the quick activation of the repeater mode uses the way in which the transit mode establishes a timing relationship by the mobile station.
  • the mobile station and the repeater operate in the fast-activated repeater mode
  • the mobile station can use the transit mode, that is, the normal transmission mode, the transmission frequency of the uplink channel is generally transmitted. It is clear that the mobile station has different transmit and receive frequency settings, and the default is to be in the transfer mode.
  • the mobile station can switch from the transit mode to the off-network mode, that is, disconnect from the relay station, and directly use the mobile station under the signal coverage range of the mobile station.
  • the receiving frequency of the downlink channel of the station is transmitted as the transmitting frequency. In this way, other mobile stations under the coverage of the mobile station's own signal can receive the signal transmitted by the mobile station. In this mode, although the coverage of the signal transmission is relatively The signal coverage of the repeater is small, but at least it can ensure that the mobile station does not receive the signal of this transmission as long as there are other mobile stations in the range.
  • S104 When the value is less than the first threshold, determine that the repeater is in an abnormal state, and switch to the off-network mode to complete the transmission request, where the off-network mode specifically adjusts the transmit frequency to the receive frequency of the downlink channel, and then transmits .
  • FIG. 2 is a flowchart of another method for switching a communication mode according to the present invention.
  • the method further includes:
  • S201 transmitting an access request frame to the relay station, and monitoring whether the downlink channel has a relay signal;
  • the abnormal state refers to at least two situations.
  • One is that the repeater is in a dormant state, and the other is that the distance between the mobile station and the repeater is far enough, and the signal coverage is too long or far beyond.
  • the scope of the situation is that the repeater is in a dormant state, and the other is that the distance between the mobile station and the repeater is far enough, and the signal coverage is too long or far beyond.
  • the size of the access request frame is generally one to two frames, and of course, there are different access request frames for different transmit signal types.
  • the access request frame is in the form of a voice header, and the access request frame is in the form of a pre-carrier, but the role is the same.
  • the specific number of transmissions is determined by the preset value, when the access request is transmitted.
  • the mobile station After the frame, the mobile station starts to listen to whether the downlink channel can receive the relay signal of the relay station relay access request frame or any other relay signal in the next time slot of the transmission access request frame, and if the relay signal is monitored, it indicates that the relay is transmitted.
  • the station has been activated to the working state by the access request frame just sent or the signal transmitted by other mobile stations.
  • the current relay mode is used for the transmission operation. It should be noted that if a transit signal is not received on the downlink channel after the access request frame is transmitted, a special case may occur in which another mobile station transmits an access request frame to the relay station simultaneously or almost simultaneously. Or the operation of using the uplink channel, such as transmitting a signal.
  • neither the mobile station nor other mobile stations can successfully transmit the signal to the repeater.
  • the mobile station is set. If the number of times the access request frame is transmitted is not used up, adjust the time of the next transmission access request frame, for example, 60 ms or 120 ms after random backoff, thereby staggering the above situation that may cause a signal collision with other mobile stations. This operation is also called random backoff retransmission. If the downlink channel has not monitored the relay signal or even the carrier after transmitting the set number of access request frames, it is determined that the mobile station cannot detect the signal transmitted by the mobile station on the uplink channel for some reason. Activate the abnormal state that the repeater is currently in. In this case, directly switch to the off-network mode for the transmit operation.
  • the present invention uses the following method to detect whether the uplink channel is in a state in which it can be used normally.
  • S302 Switch to the off-network mode to complete the transmitting request.
  • the mobile station when it is detected that the signal strength of the uplink channel is too strong, it is determined that the uplink channel may be interfered. If the uplink channel is still used for transmission, the probability that the transmitted signal can be successfully received and forwarded by the relay station is Basically there is no, so in this case, the mobile station will switch to the off-network mode for the transmitting operation.
  • Step S201 is performed on the uplink channel, and the transmitting operation of the transmission request is completed by using a transit mode. It can be seen from the embodiment that, firstly, it is determined whether the relay station is in an abnormal state by detecting whether the signal strength of the downlink channel meets the preset threshold, thereby specifically switching the working mode between the transit mode and the off-network mode, When the repeater is in an abnormal state, the receiving frequency of the downlink channel is used as the transmitting frequency to transmit a signal, thereby ensuring that other mobile stations can receive the transmitted signal and reduce the call loss rate.
  • the signal strength of the uplink channel is further determined.
  • the uplink channel signal strength is too strong, it is determined that an uplink channel signal interference occurs.
  • the success rate of transmitting the signal through the uplink channel to the relay station is very low, so the current working mode is switched to the off-network mode, thereby improving the call success rate, and transmitting the uplink channel when the uplink channel signal strength is normal.
  • the present embodiment will be mainly directed to how to switch from the off-network mode to the transit mode.
  • FIG. 4 it is a flowchart of another method for switching a communication mode according to the present invention. After completing the transmission request in the network mode, the method further includes:
  • the system will set a certain hold time, so that the mobile station that just finished the call can quickly establish a call within the hold time again and the mobile station receiving the text or signaling can quickly initiate the text or within the hold time.
  • the signaling mobile station responds, the hold time is set in advance by the system, and has different hold times for different transmit signal types.
  • the hold time is specifically The call hold time, that is, the mobile station that has indicated that the transmission signal has been completed, maintains the uplink channel for a period of time. If the mobile station continues to transmit signals during the period of time that is maintained, no detection or waiting is required, and the uplink channel can be directly used.
  • the hold time is specifically a waiting response time, so that the mobile station receiving the text or signaling can initiate a response signal to the mobile of the initiated text or signaling within the waiting response time. station. Its effect is similar to call hold time.
  • the mobile station maintains the channel usage rights for transmitting signals
  • timers for different types of transmitted signal operations.
  • the voice call hold timer is started, and the call hold state is entered;
  • the wait response timer is started, and the waiting response state is entered. Since the present embodiment uses the practical off-network mode to complete the transmission request as the application background, when the mobile station enters the hold state, the mobile station is in the off-network mode, and when the state is maintained, there may be many possibilities.
  • the working conditions such as continuing to receive the transmission request or receiving calls from other mobile stations, etc., will be explained below.
  • the method includes:
  • S401 When receiving the transmission request, detecting whether the radio frequency signal strength of the downlink channel meets the first threshold; if it is greater than or equal to the first threshold, executing S402;
  • S403 Determine that the repeater is in an abnormal state, stop the hold timer, and maintain the off-network mode to complete the transmit request.
  • the mobile station after the mobile station receives the transmission request sent by the user again, it first detects the radio frequency signal strength of the downlink channel, and then performs corresponding steps according to different situations, because the current mobile station's working mode is off-network. Mode, so here is different from the first embodiment.
  • the call request In the off-network mode, the call request is received during the call hold period, and is still determined according to the magnitude of the radio frequency signal strength of the downlink channel.
  • the transfer station since the current mobile station is in the off-network mode, Therefore, it is determined that the transfer station needs to be switched to the transfer mode when it is in the working state, and it is determined that the transfer mode is completed when the transfer station is in the abnormal state.
  • S405 When receiving the end frame of the called request of the mobile station, determine whether the end frame is a relay signal; if it is a relay signal, execute S406; if it is not a relay signal, Line S407;
  • the mobile station in the call hold state of the off-network mode receives a call request from another mobile station to call the mobile station, and does not immediately switch to the transit mode even if it is determined that the call request is transferred through the relay station. , but continue to receive the call until the call end frame is detected (of course, for the type of the call, the end frame can be divided into a voice or data end frame), indicating that the call ends and then switches to the transit mode. In order to avoid causing the received call to be disconnected and then connected to cause loss of voice or data loss. If the call request to the mobile station is not a transitive signal, the mobile station remains in the off-network mode at the time of call access and call termination.
  • the embodiment of the present invention further provides a communication mode switching device.
  • FIG. 5 is a structural diagram of a device of a communication mode switching apparatus according to the present invention.
  • the device includes a receiving transmission request unit 501, a first threshold detecting unit 502, a hold relay mode unit 503, and a switching off-mode unit 504.
  • the receiving and transmitting requesting unit 501 is configured to receive a sending request.
  • the first threshold detecting unit 502 is configured to detect whether the radio frequency signal strength of the downlink channel meets the first threshold
  • the maintaining the transfer mode unit 503 is configured to determine that the transfer station is in an active state when the detection result of the first threshold detection unit 502 is greater than or equal to the first threshold, and maintain the transfer request to complete the transfer request, the transfer mode Specifically, the transmission is performed by using the transmission frequency of the uplink channel;
  • the off-network mode unit 504 is configured to determine that the repeater is in an abnormal state when the detection result of the first threshold detection unit 502 is less than the first threshold, and switch to the off-network mode to complete the transmission request, where The off-network mode specifically transmits after adjusting the transmission frequency to the reception frequency of the downlink channel.
  • the apparatus shown in FIG. 5 further includes a downlink channel monitoring unit 601, as shown in FIG. 6.
  • the downlink channel monitoring unit 601 is configured to detect that the detection result of the first threshold detecting unit 502 is smaller than the first When the value is wide, the access request frame is transmitted to the relay station, and the relay channel is monitored whether a relay signal is present;
  • the maintaining the transit mode unit 503 is further configured to: when the downlink channel monitoring unit detects the transit signal, determine that the repeater is in an active state, and maintain the transit mode to complete the transmitting request;
  • the switching off-network mode unit 504 is further configured to: when the downlink channel monitoring unit does not detect the relay signal, determine that the repeater station is in an abnormal state, and switch to the off-network mode to complete the transmitting request.
  • the apparatus shown in FIG. 6 further includes an uplink channel detecting unit 701. As shown in FIG. 7, the uplink channel detecting unit 701 is configured to detect whether the uplink channel signal strength is before triggering the downlink channel monitoring unit. Meet the second threshold;
  • the off-network mode unit 504 is further configured to: when the detection result of the uplink channel detecting unit 701 is that the uplink channel access strength is greater than or equal to the second threshold, switch to the off-network mode to complete the transmitting request;
  • the downlink channel monitoring unit 601 is further configured to: when the detection result of the uplink channel detecting unit 701 is that the uplink channel access strength is less than the second threshold, send an access request frame to the relay station, and monitor whether the downlink channel appears. Transit signal. It can be seen from the above embodiment that, as can be seen from the embodiment, first, by detecting the downlink channel Whether the signal strength satisfies the preset threshold to determine whether the repeater is in an abnormal state, thereby specifically switching the working mode between the transit mode and the off-network mode, thereby using the downlink channel when the repeater is in an abnormal state. The frequency is transmitted as a transmission frequency to ensure that other mobile stations can receive the transmitted signal, reducing the call loss rate.
  • the signal strength of the uplink channel is further determined.
  • the uplink channel signal strength is too strong, it is determined that an uplink channel signal interference occurs.
  • the success rate of transmitting the signal through the uplink channel to the relay station is very low, so the current working mode is switched to the off-network mode, thereby improving the call success rate, and transmitting the uplink channel when the uplink channel signal strength is normal.
  • FIG. 8 is a structural diagram of another device of the communication mode switching device according to the present invention, including:
  • the first threshold detecting unit 502 is further configured to: when the switching off-mode unit 504 enters the holding state after completing the transmitting request, when detecting the transmitting request, detecting whether the radio frequency signal strength of the downlink channel satisfies the first Wide value
  • the switching mode unit 801 is configured to determine that the relay station is in an active state when the detection result of the first threshold detecting unit 502 is greater than the first threshold, and switch to the relay mode to complete the transmitting request;
  • the hold off-network mode unit 802 is configured to determine that the repeater station is in an abnormal state when the detection result of the first threshold value detecting unit 502 is less than the first threshold value, and maintain the off-network mode to complete the transmitting request.
  • FIG. 9 is another structural diagram of a communication mode switching device according to the present invention, including: The call access unit 901 is configured to: when the handover off-mode unit 504 enters the hold state after completing the transmission request, access the call when receiving the called request of the mobile station;
  • An end frame determining unit 902 configured to determine, when the end frame of the called request is received, whether the end frame is a relay signal
  • the switching relay mode unit 801 is further configured to switch to the relay mode when the determination result of the end frame determining unit is a relay signal;
  • the hold status unit 802 is further configured to maintain the off-network mode when the determination result of the end frame determination unit is not a relay signal, and enter a hold state.
  • the mode in the case of the off-network mode, the situation is analyzed for the case of continuing to transmit or receive call requests of other mobile stations, and the mode is switched to the transit mode or the off-network mode when it is determined that the relay station returns to the working state. After the end of the transmission, the mode is switched to the relay mode, and the transmission range is expanded as much as possible to ensure the success rate of the call.
  • all or part of the processes in the foregoing embodiments can be implemented by a computer program to instruct related hardware, and the program can be stored in a computer readable storage.
  • the program when executed, may include the flow of an embodiment of the methods as described above.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Abstract

本发明公开了一种通信模式切换方法和装置，包括：接收到发射请求（S101）；检测下行信道的射频信号强度是否满足第一阈值（S102）；如果大于等于所述第一阈值时，则判定中转台处于工作状态，使用中转模式完成所述发射请求（S103）；如果小于所述第一阈值时，判定中转台处于异常状态，切换至脱网模式完成所述发射请求（S104），所述脱网模式具体为将发射频率调整为下行信道的接收频率后进行发射，可以看出，通过检测下行信道的信号强度是否满足预设阈值来判断中转台是否处于异常状态，从而针对性的将工作模式在中转模式和脱网模式之间切换，由此在中转台处于异常状态时使用下行信道的接收频率作为发射频率来发射信号，从而保证其他移动台能够接收到所发射的信号，降低了呼损率。

Description

一种通信模式切换方法和装置
本申请要求于 2013 年 07 月 29 日提交中国专利局、 申请号为 201310324070.8、发明名称为"一种通信模式切换方法和装置"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
本发明涉及通信领域， 特别是涉及一种通信模式切换方法和装置。
背景技术
当移动台和中转台工作在快速激活中转台模式时，中转台在没有信号需要 中转时处于异常状态， 同时， 一般来说， 任何处于中转台信号范围内的移动台 所发射的信号都可能将中转台唤醒到工作状态， 使中转台同步到移动台的时 序， 然后再进行中转移动台的信号， 此种情况不需要进行基站激活的过程， 从 而可以大大的降低呼叫接入时间。
但是，现有技术中，移动台在获取发射请求进行发射之前无法提前获知中 转台当前所处的状态，如果中转台当前处于异常状态时， 就可能导致本次发射 无法被中转台转发，这种异常状态包括中转台在休眠状态或者是移动台到中转 台之间的距离过远， 即将或已经超出了各自信号覆盖范围，在中转台处于休眠 状态时，移动台也无法获知本次发射的信号能否成功发射到中转台将中转台从 休眠状态中唤醒到工作状态来转发本次发射的信号； 在距离过远的情况下， 移 动台发射的信号基本上不能被中转台所接收到。也就是说，移动台无法确定本 次发射能否成功被中转台接收并转发， 这样一来，会经常出现移动台发送信号 失败或发送的信号丟失的情况， 或者说一台移动台在发射，但处于同一中转台 下的其他移动台无法接收到本次发射，这种较高的呼损率将非常影响用户的体 验。
发明内容
为了解决上述移动台无法确定本次发射能否成功被中转台接收并转发从 而导致的高呼损率的技术问题， 本发明提供了一种通信模式切换方法和装置。
本发明实施例公开了如下技术方案：
一种通信模式切换方法， 包括： 接收到发射请求；
检测下行信道的射频信号强度是否满足第一阔值；
在大于等于所述第一阔值时， 判定中转台处于工作状态，保持中转模式完 成所述发射请求， 所述中转模式具体为使用上行信道的发射频率进行发射； 在小于所述第一阔值时， 判定中转台处于异常状态，切换至脱网模式完成 所述发射请求，所述脱网模式具体为将发射频率调整为下行信道的接收频率后 进行发射。
优选的， 在检测下行信道的射频信号强度小于所述第一阔值时还包括： 向中转台发射接入请求帧， 并监听下行信道是否出现中转信号； 当检测到中转信号时， 则判定所述中转台处于工作状态，保持所述中转模 式完成所述发射请求；
当没有检测到中转信号时， 则判定所述中转台处于异常状态，切换至所述 脱网模式完成所述发射请求。
优选的，在所述向中转台发射接入请求帧， 并监听下行信道是否出现中转 信号之前， 还包括：
检测上行信道信号强度是否满足第二阔值；
在所述上行信道接入强度大于等于所述第二阔值时，切换至脱网模式完成 所述发射请求；
在所述上行信道接入强度小于所述第二阔值时，执行所述向中转台发射接 入请求帧， 并监听下行信道是否出现中转信号。
优选的， 在脱网模式下进入保持状态时， 还包括：
当接收到发射请求时， 检测下行信道的射频信号强度是否满足第一阔值； 如果大于等于所述第一阔值时， 则判定中转台处于工作状态，切换至中转 模式完成所述发射请求；
如果小于所述第一阔值时， 则判定中转台处于异常状态，保持脱网模式完 成所述发射请求。
优选的， 在脱网模式下进入保持状态时， 还包括：
当接收到呼叫本移动台的被呼叫请求时， 接入呼叫；
当接收到所述被呼叫请求的结束帧时， 判断所述结束帧是否为中转信号； 如果是中转信号， 则切换至中转模式； 如果不是中转信号， 则保持脱网模式， 并进入保持状态。
优选的， 在脱网模式下进入保持状态时， 还包括：
当启动保持定时器后没有进行任何操作导致保持定时器超时，则切换至中 转模式。
一种通信模式切换装置， 包括：
接收发射请求单元， 用于接收到发射请求；
第一阔值检测单元， 用于检测下行信道的射频信号强度是否满足第一阔 值；
保持中转模式单元，用于在所述第一阔值检测单元的检测结果大于等于所 述第一阔值时判定中转台处于工作状态，保持中转模式完成所述发射请求， 所 述中转模式具体为使用上行信道的发射频率进行发射；
切换脱网模式单元，用于在所述第一阔值检测单元的检测结果小于所述第 一阔值时判定中转台处于异常状态，切换至脱网模式完成所述发射请求， 所述 脱网模式具体为将发射频率调整为下行信道的接收频率后进行发射。
优选的， 还包括：
下行信道监听单元，用于在所述第一阔值检测单元的检测结果小于所述第 一阔值时向中转台发射接入请求帧， 并监听下行信道是否出现中转信号； 保持中转模式单元， 还用于当所述下行信道监听单元检测到中转信号时， 则判定所述中转台处于工作状态， 保持中转模式完成所述发射请求；
切换脱网模式单元，还用于当所述下行信道监听单元没有检测到中转信号 时， 则判定所述中转台处于异常状态， 切换至脱网模式完成所述发射请求。
优选的， 还包括：
上行信道检测单元， 用于在触发所述下行信道监听单元之前，检测上行信 道信号强度是否满足第二阔值；
切换脱网模式单元，还用于在所述上行信道检测单元的检测结果为上行信 道接入强度大于等于所述第二阔值时， 切换至脱网模式完成所述发射请求； 下行信道监听单元，还用于在所述上行信道检测单元的检测结果为上行信 道接入强度小于所述第二阔值时， 向中转台发射接入请求帧， 并监听下行信道 是否出现中转信号。
优选的， 还包括： 所述第一阔值检测单元，还用于在所述切换脱网模式单元完成所述发射请 求后进入保持状态时，当接收到发射请求时检测下行信道的射频信号强度是否 满足第一阔值；
切换中转模式单元，用于在所述第一阔值检测单元的检测结果大于等于所 述第一阔值时判定中转台处于工作状态， 切换至中转模式完成所述发射请求； 保持脱网模式单元，用于在所述第一阔值检测单元的检测结果小于所述第 一阔值时判定中转台处于异常状态， 保持脱网模式完成所述发射请求。
优选的， 还包括：
呼叫接入单元，用于在所述切换脱网模式单元完成所述发射请求后进入保 持状态时， 当接收到呼叫本移动台的被呼叫请求时接入呼叫；
结束帧判断单元，用于当接收到所述被呼叫请求的结束帧时判断所述结束 帧是否为中转信号；
所述切换中转模式单元，还用于在所述结束帧判断单元的判断结果为中转 信号时切换至中转模式；
所述保持状态单元，还用于在所述结束帧判断单元的判断结果为不是中转 信号时保持脱网模式， 并进入保持状态。
由上述技术方案可以看出，通过检测下行信道的信号强度是否满足预设阔 值来判断中转台是否处于异常状态，从而针对性的将工作模式在中转模式和脱 网模式之间切换，由此在中转台处于异常状态时使用下行信道的接收频率作为 发射频率来发射信号，从而保证其他移动台能够接收到所发射的信号， 降低了 呼损率。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案， 下面将对 实施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本申请中记载的一些实施例， 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， 还可以根据这些附图获得其 他的附图。
图 1为本发明一种通信模式切换方法的方法流程图；
图 2为本发明一种通信模式切换方法的另一个方法流程图；
图 3为本发明一种通信模式切换方法的另一个方法流程图； 图 4为本发明一种通信模式切换方法的另一个方法流程图；
图 5为本发明一种通信模式切换装置的装置结构图；
图 6为本发明一种通信模式切换装置的装置结构图；
图 7为本发明一种通信模式切换装置的另一个装置结构图；
图 8为本发明一种通信模式切换装置的另一个装置结构图；
图 9为本发明一种通信模式切换装置的另一个装置结构图。
具体实施方式
本发明实施例提供了一种通信模式切换方法和装置。 首先，通过检测下行 信道的信号强度是否满足预设阔值来判断中转台是否处于异常状态，从而针对 性的将工作模式在中转模式和脱网模式之间切换，由此在中转台处于异常状态 时使用下行信道的接收频率作为发射频率来发射信号，从而保证其他移动台能 够接收到所发射的信号， 降低了呼损率。
其次，在检测下行信道的信号强度小于预设阔值的情况下， 进一步对上行 信道的信号强度进行判定， 当上行信道信号强度过强时， 则判定出现了上行信 道信号干扰的情况，由于这种情况下通过上行信道发射信号到达中转台的成功 率很低， 故切换当前的工作模式为脱网模式， 由此提高呼叫成功率， 在上行信 道信号强度正常时，通过在上行信道发射接入请求帧后在下行信道监听是否有 中转信号， 以此判定当前处于异常状态的中转台能否被唤醒为工作状态， 进一 步的提高了呼叫成功率。
最后，在处于脱网模式的情况下，针对继续发射或者接收其他移动台的呼 叫请求等情况进行分析，在判定中转台恢复到工作状态时切换成中转模式或者 脱网模式结束本次所述发射后切换成中转模式，尽可能的在保证呼叫成功率的 情况下扩大发射范围。
为使本发明的上述目的、特征和优点能够更加明显易懂， 下面结合附图对 本发明实施例进行详细描述。
实施例一
请参阅图 1， 其为本发明一种通信模式切换方法的方法流程图， 该方法包 括以下步骤：
S101 : 接收到发射请求；
所谓的发射请求可以认为是用户通过按下移动台的通话键或者进入菜单 进行短消息的编辑等行为所触发的请求，也就是说， 所述发射请求的种类至少 包括语音类的和文本类或信令类的发射请求。
S102: 检测下行信道的射频信号强度是否满足第一阔值；
也就是说， 只要当中转台处于工作状态时， 不论中转台是否正在转发其他 移动台的信号，在中转台信号覆盖范围下的移动台的下行信道都至少能够接收 到一定强度的载波信号，所以这是一种有效判断中转台当前处于何种状态的判 断依据，移动台根据比较下行信道接收到的射频信号强度与预设的第一阔值之 间的大小来判断中转台的当前工作状态。下述步骤 S103和 S104就是针对不同 的比较结果做出的对应操作。 当比较结果为大于等于所述第一阔值时， 则进入 步骤 S103; 如果比较结果为小于所述第一阔值时， 则进入步骤 S104。
当然，在介绍针对不同比较结果所进行的对应操作之前，还需要先解释一 下快速激活中转台模式以及移动台的两种不同的工作模式。所述快速激活中转 台模式是一种在使用基站进行通信时， 由移动台建立时序关系的方式，也就是 说， 当使用基站进行通信时， 若基站目前没有发射， 也可釆用基站下行信道与 移动台的上行信道定时同步来发送下行信道的方法， 从而避免基站激活的过 程。 基站的这种行为也能确保所有的移动台工作在相同的定时基准下。
快速激活中转台模式釆用的是中转模式由移动台建立时序关系的方式。当 移动台和中转台操作在快速激活中转台模式， 当中转台处于工作状态时，移动 台即可使用中转模式，也就是一般而言的正常发射方式以上行信道的发射频率 进行发射， 这里需要注明的是， 移动台发射和接收频率设置不同， 一般默认是 处于中转模式下的。 当检测到中转台休眠或者移动台距离中转台较远时，移动 台则可以从中转模式切换到脱网模式，也就是脱离中转台的中转， 而直接在移 动台自身的信号覆盖范围下使用移动台的下行信道的接收频率作为发射频率 进行发射， 这样的话，在移动台自身信号覆盖范围下的其他移动台均可以接收 到该移动台发射的信号，这种模式下虽然信号发射的覆盖范围相对于中转台的 信号覆盖范围要小，但是至少能保证该范围下只要有其他的移动台，都能接收 移动台均没有接收到本次发射的信号的问题。
S103: 在大于等于所述第一阔值时， 判定中转台处于工作状态， 保持中转 模式完成所述发射请求，所述中转模式具体为使用上行信道的发射频率进行发 射； .
S104: 在小于所述第一阔值时， 判定中转台处于异常状态， 切换至脱网模 式完成所述发射请求，所述脱网模式具体为将发射频率调整为下行信道的接收 频率后进行发射。
使用脱网模式进行发射，可以让处于本移动台信号覆盖范围内的其他移动 台接收到本移动台发射的信号， 当然， 虽然当前中转台处于异常状态， 任意移 动台发送到中转台的信号都能够激活中转台， 使得中转台重新回到工作状态， 但是，重新激活中转台的前提条件是有移动台的信号成功发送到中转台，所以， 在判定中转台处于异常状态后， 可以优选的尝试激活中转台， 具体的， 请参阅 图 2， 其为本发明一种通信模式切换方法的另一个方法流程图， 在检测下行信 道的射频信号强度小于所述阈值时还包括：
S201 : 向中转台发射接入请求帧， 并监听下行信道是否出现中转信号； S202: 当检测到中转信号时， 则判定所述中转台处于工作状态， 保持所述 中转模式完成所述发射请求；
S203: 当没有检测到中转信号时， 则判定所述中转台处于异常状态， 切换 至所述脱网模式完成所述发射请求。
首先说明一下异常状态， 这里是指至少包括两种情况， 一种是中转台处于 休眠状态， 一种是指该移动台与中转台之间距离足够远，远到即将或已经超出 了各自信号覆盖范围的情况。
也就是说，通过发送接入请求帧来尝试激活处于异常状态的中转台，接入 请求帧的大小一般来说是一到两帧，当然针对不同的发射信号类型有不同的接 入请求帧， 针对语音信号的发射请求， 其接入请求帧是以语音头的形式， 针对 文字或信令形式的发射请求， 其接入请求帧则为预载波的形式，但所起的作用 都是一样， 就是尝试是否能将信号发送到中转台并激活中转台到工作状态，一 般情况下可以尝试多次发送接入请求帧， 当然， 具体的发送次数以预先设置的 数值来定， 当发射接入请求帧后，移动台便开始在发送接入请求帧的下个时隙 监听下行信道是否能够接收到中转台中转接入请求帧的中转信号或者其他任 意中转信号，如果监听到了中转信号， 则表明中转台已经被刚才发送的接入请 求帧或者其他移动台发射的信号激活到工作状态了，这时就不需要再继续发送 接入请求帧了， 直接使用当前的中转模式进行发射操作。 需要注意的是， 如果 是发射了接入请求帧后在下行信道没有接收到中转信号还可能是发生了一种 特殊情况，就是有其他移动台同时或几乎同时向中转台发射了接入请求帧或发 射信号等使用上行信道的操作， 这种情况下， 无论是本移动台还是其他移动台 都是无法将信号成功发射到中转台的，针对可能出现的这种情况，移动台在设 定的发射接入请求帧的次数没有用完的情况下，调整下一次发射接入请求帧的 时间， 比如说随机退后 60ms或 120ms等操作， 由此错开可能与其他移动台发 生信号碰撞的上述情况， 这种操作也叫做随机退避重传。如果在发送了设定次 数的接入请求帧后下行信道一直没有监听到中转信号甚至载波，则判定基于某 种原因导致中转台无法在上行信道检测到本移动台发射的信号，本移动台无法 激活中转台当前所处于的异常状态， 这种情况下， 直接切换到脱网模式进行发 射操作。
同时需要注意的是， 在尝试激活中转台之前， 优选的， 还需要检测上行信 道是否有其他信号干扰的情况， 因为即使正常使用上行信道进行发射时，依旧 会有一些情况导致激活中转台不成功，比如说其他移动台正使用与上行信道相 同的频率在进行通话，这样即便本移动台在上行信道向中转台发射信道接入请 求帧， 中转台也会因上行信道受干扰导致无法检测到本移动台的信号，从而导 致本次激活中转台失败。针对上述情况， 本发明使用如下方式检测上行信道是 否处于能够正常使用的状态。
S301 : 检测上行信道信号强度是否满足第二阔值；
在所述上行信道接入强度大于等于所述第二阔值时， 执行 S302;
在所述上行信道接入强度小于所述第二阔值时， 执行 S303。
S302: 切换至脱网模式完成所述发射请求；
也就是说， 当检测到上行信道的信号强度过强时， 则判定可能出现了上行 信道被干扰的情况，如果依然使用上行信道进行发射， 那么发射信号能够成功 被中转台接收到并转发的几率基本是没有的， 所以在这种情况下，移动台将切 换成脱网模式进行发射操作。
S303: 在上行信道执行步骤 S201， 使用中转模式完成所述发射请求的发 射操作。 由本实施例可以看出， 首先，通过检测下行信道的信号强度是否满足预设 阔值来判断中转台是否处于异常状态，从而针对性的将工作模式在中转模式和 脱网模式之间切换，由此在中转台处于异常状态时使用下行信道的接收频率作 为发射频率来发射信号，从而保证其他移动台能够接收到所发射的信号， 降低 了呼损率。
其次，在检测下行信道的信号强度小于预设阔值的情况下， 进一步对上行 信道的信号强度进行判定， 当上行信道信号强度过强时， 则判定出现了上行信 道信号干扰的情况，由于这种情况下通过上行信道发射信号到达中转台的成功 率很低， 故切换当前的工作模式为脱网模式， 由此提高呼叫成功率， 在上行信 道信号强度正常时，通过在上行信道发射接入请求帧后在下行信道监听是否有 中转信号， 以此判定当前处于异常状态的中转台能否被唤醒为工作状态， 进一 步的提高了呼叫成功率。 实施例二
在实施例一的基础上，本实施例将主要针对如何从脱网模式切换到中转模 式进行说明， 请参阅图 4， 其为本发明一种通信模式切换方法的另一个方法流 程图， 在脱网模式下完成所述发射请求后， 还包括：
在介绍技术方案之前先介绍一下如何进入在脱网模式下完成所述发射请 求后进入保持状态以及何为保持状态。
一般来说， 系统会设定一定的保持时间， 以方便刚结束通话的移动台可以 再次在保持时间内快速建立呼叫以及接收到文本或信令的移动台能在保持时 间内快速对发起文本或信令的移动台做出响应，所述保持时间是预先通过系统 进行设定的，针对不同的发射信号类型有不同的保持时间， 当发射的是语音类 型的信号时， 所述保持时间具体为呼叫保持时间， 即表示为已经完成一次发射 信号的移动台保持上行信道一段时间，如果在保持的这一段时间内该移动台继 续发射信号， 则不需要检测或者等待， 可以直接使用上行信道。 当发射的是文 本或信令类型的信号时， 所述保持时间具体为等待响应时间， 以便接收到文本 或信令的移动台可在等待响应时间内发起响应信号给发起文本或信令的移动 台。 它所起的功效也是和呼叫保持时间类似的。
也就是说， 在保持时间内， 移动台会保持用于发射信号的信道使用权， 同 时还需要说明的是， 针对不同类型的发射信号操作， 会有不同的定时器， 针对 刚完成发射语音类的呼叫信号类型时， 启动的是语音呼叫保持定时器， 进入的 是呼叫保持状态； 针对刚完成发射文本数据或信令类的信号类型时， 启动的是 等待响应定时器， 进入的是等待响应状态。 由于本实施例是以实用脱网模式完 成发射请求作为应用背景的，故当移动台进入保持状态时， 该移动台所处的工 作模式还是脱网模式， 在保持状态时， 可能会出现很多种可能的工作情况， 比 如说继续接收到发射请求或者接收到其他移动台的呼叫等等，以下将针对会经 常出现的情况进行说明。
在脱网模式下完成所述发射请求后进入保持状态时， 包括：
S401 : 当接收到发射请求时，检测下行信道的射频信号强度是否满足第一 阔值； 如果大于等于所述第一阔值时， 则执行 S402;
如果小于所述第一阔值时， 则执行 S403;
S402: 判定中转台处于工作状态， 停止保持定时器， 切换至中转模式完成 所述发射请求；
S403: 判定中转台处于异常状态， 停止保持定时器， 保持脱网模式完成所 述发射请求。
也就是说， 当该移动台再次接收到用户发出的发射请求后， 首先还是对下 行信道的射频信号强度进行检测， 然后根据不同情况依次执行相应的步骤， 由 于当前移动台的工作模式是脱网模式， 所以这里还是和实施例一有所不同的， 脱网模式的呼叫保持期间接收到发射请求，依旧根据下行信道的射频信号强度 的大小作为判断依据， 当然由于当前移动台处于脱网模式，故判断中转台处于 工作状态时需要切换到中转模式，判断中转台处于异常状态时则保持脱网模式 完成所述发射请求。
或者，
S404: 当接收到呼叫本移动台的被呼叫请求时， 停止保持定时器， 开始接 入呼叫；
S405: 当接收到所述呼叫本移动台的被呼叫请求的结束帧时， 判断所述结 束帧是否为中转信号； 如果是中转信号， 执行 S406; 如果不是中转信号， 执 行 S407;
S406: 切换至中转模式；
S407: 启动保持定时器， 进入保持状态。
也就是说，处于脱网模式的呼叫保持状态的移动台接收到其他移动台呼叫 本移动台的呼叫请求， 即使判断出该呼叫请求是通过中转台中转过来的，也不 会立刻切换到中转模式， 而是继续接收这次呼叫， 直到检测到这次呼叫结束帧 (当然针对这次呼叫的类型， 所述结束帧可以分为语音或数据结束帧）， 表明 本呼叫结束，再切换到中转模式， 以免造成接收的呼叫先断掉再接进来造成话 音丟失或数据丟失的情况。 如果呼叫本移动台的呼叫请求不是中转过来的信 号， 则呼叫接入和呼叫结束时， 移动台都始终停留在脱网模式。
或者，
S408: 当启动保持定时器后没有进行任何操作导致保持定时器超时， 则切 换至中转模式。
也就是说， 启动保持定时器后， 未接收到呼叫本移动台的呼叫， 移动台只 有等待保持定时器超时， 方能切换回中转模式。 但是之后一直没有进行任何操作的话，会导致保持定时器倒数计时归零或者超 时等， 这样的话， 移动台将不会继续停留在脱网模式， 而是切换回中转模式， 等待下一次用户操作。 由本实施例可以看出， 在处于脱网模式的情况下， 针对继续发射或者接收 其他移动台的呼叫请求等情况进行分析，在判定中转台恢复到工作状态时切换 成中转模式或者脱网模式结束本次所述发射后切换成中转模式，尽可能的在保 证呼叫成功率的情况下扩大发射范围。 实施例三
与上述一种通信模式切换方法相对应，本发明实施例还提供了一种通信模 式切换装置。 请参阅图 5， 其为本发明一种通信模式切换装置的装置结构图， 该装置包括接收发射请求单元 501、 第一阔值检测单元 502、 保持中转模式单 元 503和切换脱网模式单元 504。 所述接收发射请求单元 501， 用于接收到发射请求；
所述第一阔值检测单元 502， 用于检测下行信道的射频信号强度是否满足 第一阔值；
保持中转模式单元 503， 用于在所述第一阔值检测单元 502的检测结果大 于等于所述第一阔值时判定中转台处于工作状态，保持中转模式完成所述发射 请求， 所述中转模式具体为使用上行信道的发射频率进行发射；
切换脱网模式单元 504， 用于在所述第一阔值检测单元 502的检测结果小 于所述第一阔值时判定中转台处于异常状态，切换至脱网模式完成所述发射请 求， 所述脱网模式具体为将发射频率调整为下行信道的接收频率后进行发射。 优选的，前述图 5所示的装置还包括下行信道监听单元 601，如图 6所示： 下行信道监听单元 601， 用于在所述第一阔值检测单元 502的检测结果小 于所述第一阔值时向中转台发射接入请求帧，并监听下行信道是否出现中转信 号；
保持中转模式单元 503， 还用于当所述下行信道监听单元检测到中转信号 时， 则判定所述中转台处于工作状态， 保持中转模式完成所述发射请求；
切换脱网模式单元 504， 还用于当所述下行信道监听单元没有检测到中转 信号时，则判定所述中转台处于异常状态，切换至脱网模式完成所述发射请求。 优选的，前述图 6所示的装置还包括上行信道检测单元 701，如图 7所示： 所述上行信道检测单元 701， 用于在触发所述下行信道监听单元之前， 检 测上行信道信号强度是否满足第二阔值；
切换脱网模式单元 504， 还用于在所述上行信道检测单元 701的检测结果 为上行信道接入强度大于等于所述第二阔值时，切换至脱网模式完成所述发射 请求；
下行信道监听单元 601， 还用于在所述上行信道检测单元 701的检测结果 为上行信道接入强度小于所述第二阔值时， 向中转台发射接入请求帧， 并监听 下行信道是否出现中转信号。 由上述实施例可以看出， 由本实施例可以看出， 首先， 通过检测下行信道 的信号强度是否满足预设阔值来判断中转台是否处于异常状态，从而针对性的 将工作模式在中转模式和脱网模式之间切换，由此在中转台处于异常状态时使 用下行信道的接收频率作为发射频率来发射信号，从而保证其他移动台能够接 收到所发射的信号， 降低了呼损率。
其次，在检测下行信道的信号强度小于预设阔值的情况下， 进一步对上行 信道的信号强度进行判定， 当上行信道信号强度过强时， 则判定出现了上行信 道信号干扰的情况，由于这种情况下通过上行信道发射信号到达中转台的成功 率很低， 故切换当前的工作模式为脱网模式， 由此提高呼叫成功率， 在上行信 道信号强度正常时，通过在上行信道发射接入请求帧后在下行信道监听是否有 中转信号， 以此判定当前处于异常状态的中转台能否被唤醒为工作状态， 进一 步的提高了呼叫成功率。 实施例四
在实施例三的基础上，本实施例将主要针对如何从脱网模式切换到中转模 式进行说明， 请参阅图 8， 其为本发明一种通信模式切换装置的另一个装置结 构图， 包括：
所述第一阔值检测单元 502， 还用于在所述切换脱网模式单元 504完成所 述发射请求后进入保持状态时，当接收到发射请求时检测下行信道的射频信号 强度是否满足第一阔值；
切换中转模式单元 801， 用于在所述第一阔值检测单元 502的检测结果大 于等于所述第一阔值时判定中转台处于工作状态，切换至中转模式完成所述发 射请求；
所述保持脱网模式单元 802， 用于在所述第一阔值检测单元 502的检测结 果小于所述第一阔值时判定中转台处于异常状态，保持脱网模式完成所述发射 请求。 实施例五
在实施例三的基础上，本实施例将主要针对如何从脱网模式切换到中转模 式进行说明， 请参阅图 9， 其为本发明一种通信模式切换装置的另一个装置结 构图， 包括： 呼叫接入单元 901， 用于在所述切换脱网模式单元 504完成所述发射请求 后进入保持状态时， 当接收到呼叫本移动台的被呼叫请求时接入呼叫；
结束帧判断单元 902， 用于当接收到所述被呼叫请求的结束帧时判断所述 结束帧是否为中转信号；
所述切换中转模式单元 801， 还用于在所述结束帧判断单元的判断结果为 中转信号时切换至中转模式；
所述保持状态单元 802， 还用于在所述结束帧判断单元的判断结果为不是 中转信号时保持脱网模式， 并进入保持状态。
由上述实施例可以看出， 在处于脱网模式的情况下， 针对继续发射或者接 收其他移动台的呼叫请求等情况进行分析，在判定中转台恢复到工作状态时切 换成中转模式或者脱网模式结束本次所述发射后切换成中转模式，尽可能的在 保证呼叫成功率的情况下扩大发射范围。 需要说明的是，本领域普通技术人员可以理解实现上述实施例方法中的全 部或部分流程，是可以通过计算机程序来指令相关的硬件来完成， 所述的程序 可存储于一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法 的实施例的流程。 其中， 所述的存储介质可为磁碟、 光盘、 只读存储记忆体 ( Read-Only Memory, ROM )或随机存储记忆体 ( Random Access Memory, RAM )等。
以上对本发明实施例所提供的一种通信模式切换方法和装置进行了详细 施例的说明只是用于帮助理解本发明的方法及其核心思想； 同时，对于本领域 的一般技术人员，依据本发明的思想， 在具体实施方式及应用范围上均会有改 变之处， 综上所述， 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种通信模式切换方法， 其特征在于， 包括：
接收到发射请求；
检测下行信道的射频信号强度是否满足第一阔值；
在大于等于所述第一阔值时， 判定中转台处于工作状态，保持中转模式完 成所述发射请求， 所述中转模式具体为使用上行信道的发射频率进行发射； 在小于所述第一阔值时， 判定中转台处于异常状态，切换至脱网模式完成 所述发射请求，所述脱网模式具体为将发射频率调整为下行信道的接收频率后 进行发射。
2、 根据权利要求 1所述的方法， 其特征在于， 在检测下行信道的射频信 号强度小于所述第一阔值时还包括：
向中转台发射接入请求帧， 并监听下行信道是否出现中转信号； 当检测到中转信号时， 则判定所述中转台处于工作状态，保持所述中转模 式完成所述发射请求；
当没有检测到中转信号时， 则判定所述中转台处于异常状态，切换至所述 脱网模式完成所述发射请求。
3、 根据权利要求 2所述的方法， 其特征在于， 在所述向中转台发射接入 请求帧， 并监听下行信道是否出现中转信号之前， 还包括：
检测上行信道信号强度是否满足第二阔值；
在所述上行信道接入强度大于等于所述第二阔值时，切换至脱网模式完成 所述发射请求；
在所述上行信道接入强度小于所述第二阔值时，执行所述向中转台发射接 入请求帧， 并监听下行信道是否出现中转信号。
4、 根据权利要求 1所述的方法， 其特征在于， 在脱网模式下进入保持状 态时， 还包括：
当接收到发射请求时， 检测下行信道的射频信号强度是否满足第一阔值； 如果大于等于所述第一阔值时， 则判定中转台处于工作状态，切换至中转 模式完成所述发射请求；
如果小于所述第一阔值时， 则判定中转台处于异常状态，保持脱网模式完 成所述发射请求。
5、 根据权利要求 1所述的方法， 其特征在于， 在脱网模式下进入保持状 态时， 还包括：
当接收到呼叫本移动台的被呼叫请求时， 接入呼叫；
当接收到所述被呼叫请求的结束帧时， 判断所述结束帧是否为中转信号； 如果是中转信号， 则切换至中转模式；
如果不是中转信号， 则保持脱网模式， 并进入保持状态。
6、 根据权利要求 1所述的方法， 其特征在于， 在脱网模式下进入保持状 态时， 还包括：
当启动保持定时器后没有进行任何操作导致保持定时器超时，则切换至中 转模式。
7、 一种通信模式切换装置， 其特征在于， 包括：
接收发射请求单元， 用于接收到发射请求；
第一阔值检测单元， 用于检测下行信道的射频信号强度是否满足第一阔 值；
保持中转模式单元，用于在所述第一阔值检测单元的检测结果大于等于所 述第一阔值时判定中转台处于工作状态，保持中转模式完成所述发射请求， 所 述中转模式具体为使用上行信道的发射频率进行发射；
切换脱网模式单元，用于在所述第一阔值检测单元的检测结果小于所述第 一阔值时判定中转台处于异常状态，切换至脱网模式完成所述发射请求， 所述 脱网模式具体为将发射频率调整为下行信道的接收频率后进行发射。
8、 根据权利要求 7所述的装置， 其特征在于， 还包括：
下行信道监听单元，用于在所述第一阔值检测单元的检测结果小于所述第 一阔值时向中转台发射接入请求帧， 并监听下行信道是否出现中转信号； 保持中转模式单元， 还用于当所述下行信道监听单元检测到中转信号时， 则判定所述中转台处于工作状态， 保持中转模式完成所述发射请求；
切换脱网模式单元，还用于当所述下行信道监听单元没有检测到中转信号 时， 则判定所述中转台处于异常状态， 切换至脱网模式完成所述发射请求。
9、 根据权利要求 8所述的装置， 其特征在于， 还包括：
上行信道检测单元， 用于在触发所述下行信道监听单元之前，检测上行信 道信号强度是否满足第二阔值； 切换脱网模式单元，还用于在所述上行信道检测单元的检测结果为上行信 道接入强度大于等于所述第二阔值时， 切换至脱网模式完成所述发射请求； 下行信道监听单元，还用于在所述上行信道检测单元的检测结果为上行信 道接入强度小于所述第二阔值时， 向中转台发射接入请求帧， 并监听下行信道 是否出现中转信号。
10、 根据权利要求 7所述的装置， 其特征在于， 还包括：
所述第一阔值检测单元，还用于在所述切换脱网模式单元完成所述发射请 求后进入保持状态时，当接收到发射请求时检测下行信道的射频信号强度是否 满足第一阔值；
切换中转模式单元，用于在所述第一阔值检测单元的检测结果大于等于所 述第一阔值时判定中转台处于工作状态， 切换至中转模式完成所述发射请求； 保持脱网模式单元，用于在所述第一阔值检测单元的检测结果小于所述第 一阔值时判定中转台处于异常状态， 保持脱网模式完成所述发射请求。
11、 根据权利要求 7所述的装置， 其特征在于， 还包括：
呼叫接入单元，用于在所述切换脱网模式单元完成所述发射请求后进入保 持状态时， 当接收到呼叫本移动台的被呼叫请求时接入呼叫；
结束帧判断单元，用于当接收到所述被呼叫请求的结束帧时判断所述结束 帧是否为中转信号；
所述切换中转模式单元，还用于在所述结束帧判断单元的判断结果为中转 信号时切换至中转模式；
所述保持状态单元，还用于在所述结束帧判断单元的判断结果为不是中转 信号时保持脱网模式， 并进入保持状态。
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