WO2008011798A1 - Procédé et dispositif de synchronisation initiale entre un système gsm et un système td-scdma - Google Patents

Procédé et dispositif de synchronisation initiale entre un système gsm et un système td-scdma Download PDF

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Publication number
WO2008011798A1
WO2008011798A1 PCT/CN2007/002110 CN2007002110W WO2008011798A1 WO 2008011798 A1 WO2008011798 A1 WO 2008011798A1 CN 2007002110 W CN2007002110 W CN 2007002110W WO 2008011798 A1 WO2008011798 A1 WO 2008011798A1
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WO
WIPO (PCT)
Prior art keywords
scdma
gsm
radio frequency
frame
time slot
Prior art date
Application number
PCT/CN2007/002110
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English (en)
French (fr)
Inventor
Bingtao Gao
Jie Xiao
Sujuan Hong
Original Assignee
Datang Mobile Communications Equipment Co., Ltd
Shanghai Datang Mobile Communications Equipment Co, Ltd.
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 Datang Mobile Communications Equipment Co., Ltd, Shanghai Datang Mobile Communications Equipment Co, Ltd. filed Critical Datang Mobile Communications Equipment Co., Ltd
Priority to JP2008540439A priority Critical patent/JP4801166B2/ja
Priority to US12/160,537 priority patent/US20100222064A1/en
Priority to EP07800682A priority patent/EP2043282A4/en
Publication of WO2008011798A1 publication Critical patent/WO2008011798A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662Arrangements for Wireless System Synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662Arrangements for Wireless System Synchronisation
    • H04B7/2668Arrangements for Wireless Code-Division Multiple Access [CDMA] System Synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662Arrangements for Wireless System Synchronisation
    • H04B7/2671Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678Time synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/0055Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0065Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
    • H04W56/007Open loop measurement
    • H04W56/0075Open loop measurement based on arrival time vs. expected arrival time
    • H04W56/008Open loop measurement based on arrival time vs. expected arrival time detecting arrival of signal based on received raw signal

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to a method and apparatus for initial synchronization with a TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system in a GSM (Global System for Mobile Communications) system connection mode.
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the GSM radio frame length is 60/13ms
  • the 13th frame is the control frame
  • the 26th frame is the idle frame
  • the cycle is cycled by 26 frames.
  • the TD-SCDMA radio frame is divided into two sub-frames, each sub-frame is 5 ms long, and the terminal is in the GSM system connection state, and the GSM idle frame detects the downlink synchronization code in the TD-SCDMA frame in the figure ( DwPTS), and then synchronized with the TD-SCDMA system through corresponding synchronization processing.
  • Figure 3 shows the relationship between the GSM radio frame and the TD-SCDMA radio subframe. Specifically, the following relationship exists between the two:
  • T TDS is the corresponding TD-SCDMA radio subframe length.
  • the GSM idle frame appearance period is 26 frames in the GSM connection state, and the TD-SCDMA 24 subframes (120ms) and the GSM 26 frames (120ms) have the same period. Therefore, if only the GSM idle frame is used to receive the data of the TD-SCDMA frame, it is possible that the DwPTS is not detected at all times.
  • the TD-SCDMA frame is located above, and the GSM frame is located below.
  • GSM is intercepted from the beginning of the frame, and TD-SCDMA is intercepted from the same time as the GSM frame header, which may be any position of the TD-SCDMA frame. Since the TD-SCDMA frame is longer than the frame length of the GSM frame and the 26 frames of the GSM and the 24 frames of the TD-SCDMA are completely aligned, when the DwPTS is continuously transmitted, if the DwPTS is in the position shown in FIG. 4, the GSM idle frame is utilized. DwPTS will not be detected.
  • the (N*24-l) frame of the TD-SCDMA local frame number is an even frame corresponding to the GSM idle frame, and the DwPTS is transmitted in the odd frame, or the (N*24-l) frame of the TD-SCDMA local frame number If the odd frame corresponds to the GSM idle frame and the DwPTS is transmitted in the even frame, the DwPTS of the TD-SCDMA frame will not be detected by using only the idle frame in the GSM connection state.
  • GSM Global System for Mobile Communications
  • the present invention provides a method and apparatus for initial synchronization with a TD-SCDMA system in a GSM system connection mode, which is used to solve the problem that when a TD-SCDMA/GSM dual mode terminal detects a TD-SCDMA frame in a GSM connection state in the prior art, There may be a problem that the DwPTS is not detected and the detection takes a long time; further solving the problem that the prior art detects the DwPTS with low reliability and cannot support the new feature.
  • a method for detecting a DwPTS of a TD-SCDMA frame in a connected state of a GSM system comprising the steps of:
  • the communication device in the GSM system connection state receives or transmits the service data in the radio frequency band of the GSM system in the service time slot of the GSM frame, and receives the TD- in the radio frequency band of the TD-SCDMA system in the idle time slot of the GSM frame.
  • SCDMA data ;
  • the communication device detects DwPTS from the received TD-SCDMA data.
  • the GSM frame has at least two idle time slots that receive TD-SCDMA data.
  • the at least two idle time slots are consecutive time slots in a GSM frame.
  • the frequency band is switched to the radio frequency band of the GSM system.
  • the communication device calls the processing function of the TD-SCDMA to detect the DwPTS in the TD-SCDMA signal in the GSM system connection state.
  • a method for initial synchronization of a TD-SCDMA/GSM dual-mode system comprising the steps of: a communication device in a connected state of a GSM system receiving or transmitting service data in a radio frequency band of a GSM system in a service time slot of a GSM frame, and Receiving TD-SCDMA data in a radio frequency band of the TD-SCDMA system in an idle time slot of the GSM frame;
  • the communication device detects DwPTS from the received TD-SCDMA data
  • the communication device performs synchronization processing with the TD-SCDMA system based on the detected DwPTS. According to the above method:
  • the GSM frame has at least two idle time slots for receiving TD-SCDMA data.
  • the at least two idle time slots are consecutive time slots in a GSM frame.
  • the frequency band is switched to the radio frequency band of the GSM system.
  • the communication device calls the processing function of the TD-SCDMA to detect the DwPTS in the TD-SCDMA signal in the GSM system connection state.
  • a GSM system processing device comprising:
  • a communication interface for receiving and transmitting information
  • a radio frequency unit of the GSM system configured to receive or transmit service data through the communication interface in a radio frequency band of the GSM system in a service time slot of the GSM frame;
  • a TD-SCDMA system radio unit for receiving TD-SCDMA data via the communication interface in a radio frequency band of a TD-SCDMA system in an idle time slot of a GSM frame;
  • control unit configured to control the radio unit of the GSM system and the radio unit of the TD-SCDMA system The radio frequency switching between, and detecting the DwPTS in the received TD-SCDMA data.
  • the TD-SCDMA system radio unit receives at least two idle slots in the GSM frame
  • the idle time slot is a continuous idle time slot in a G SM frame.
  • the GSM system processing device is switched from the GSM system radio unit to the TD-SCDMA system radio unit by the control unit at a starting time point corresponding to the idle time slot, and ends at the corresponding idle time slot.
  • the time point is switched from the TD-SCDMA system radio unit to the GSM system radio unit.
  • the control unit After receiving the TD-SCDMA data, the control unit calls the processing function of the TD-SCDMA to detect the DwPTS in the TD-SCDMA signal.
  • a communication device comprising:
  • a communication unit configured to receive and send information
  • a GSM system processing unit configured to receive or transmit service data in the GSM system connection mode by using the radio frequency band of the GSM system in a service time slot of the GSM frame, in the idle time slot of the GSM frame Receiving TD-SCDMA data through the communication unit and detecting DwPTS from the radio frequency band of the TD-SCDMA system;
  • a processing unit for the TD-SCDMA system for transmitting and receiving information through the communication unit in the TD-SCDMA system connection mode
  • a synchronization unit configured to perform synchronization processing between the GSM system processing unit and the TD-SCDMA system processing unit according to the detected DwPTS in a GSM system connection mode;
  • a system switching unit configured to complete switching between the processing unit of the GSM system and the processing unit of the TD-SCDMA system.
  • the GSM system processing unit includes:
  • a communication interface for receiving and transmitting information
  • a radio frequency unit of the GSM system configured to receive or transmit service data through the communication interface in a radio frequency band of the GSM system in a service time slot of the GSM frame;
  • TD-SCDMA system radio unit for TD-SCDMA system in idle time slots of GSM frames a radio frequency band, receiving TD-SCDMA data via the communication interface;
  • a control unit configured to control radio frequency switching between the radio unit of the GSM system and the radio unit of the TD-SCDMA system, and detect the DwPTS in the received TD-SCDMA data.
  • the GSM system processing unit receives TD-SCDMA data at least in two idle time slots in the GSM frame.
  • the idle time slot is a continuous idle time slot in a G SM frame.
  • the GSM system processing unit switches from the radio frequency band of the GSM system to the radio frequency band of the TD-SCDMA system at a starting time point corresponding to the idle time slot, and at the end time point corresponding to the idle time slot
  • the radio frequency band of the TD-SCDMA system is switched to the radio frequency band of the GSM system.
  • the GSM system processing unit calls the processing function of TD-SCDMA to detect the DwPTS in the TD-SCDMA signal.
  • the invention fully utilizes the intra-frame idle time slot in the GSM connection state to detect the DwPTS of the TD-SCDMA frame, and according to the configuration of the idle time slot, the DwPTS can be detected in the 13 frame period of the GSM in a short time, thereby solving In the GSM connection state, relying solely on GSM idle frames to find DwPTS may never be found.
  • the GSM/TD-SCDMA dual-mode system synchronization realized by the fast detection of DwPTS is necessary for the completion of measurement of TD-SCDMA system and handover between GSM and TD-SCDMA systems, and is also beneficial to the entire synchronization process. Improve the reliability of the system by implementing necessary steps such as synchronization adjustment, automatic gain control (AGC), and repeated inspection.
  • AGC automatic gain control
  • the present invention supports TD-SCDMA base stations to discontinuously transmit DwPTS, and supports future new features such as blanking rules.
  • FIG. 1 is a schematic diagram of a multiplex frame structure of a GSM system service in the background art
  • FIG. 2 is a schematic diagram showing a frame structure of a TD-SCDMA system in the background art
  • FIG. 3 is a schematic diagram of a timing relationship of a GSM/TD-SCDMA frame in the background art
  • 4 is a schematic diagram of a TD-SCDMA frame and a GSM frame when DwPTS is continuously transmitted in the background art
  • FIG. 5 is a schematic diagram of a time slot configuration of a GSM frame in a GSM connection state according to an embodiment of the present invention
  • FIG. 6 is a GSM idle according to an embodiment of the present invention
  • Schematic diagram of timing changes of TD-SCDMA radio frames observed in the window
  • FIG. 7 is a schematic diagram showing a timing relationship of a TD-SCDMA radio frame with respect to a GSM frame according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram showing a transmission advance amount and a frequency stabilization time of a GSM uplink service slot according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of detecting continuous transmission of DwPTS by using a GSM idle window according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of detecting discontinuous transmission of DwPTS by using a GSM idle window according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a processing unit of a GSM system according to an embodiment of the present invention.
  • FIG. 14 is a flowchart of processing each frame of GSM when DwPTS is detected by using four consecutive time slots in the GSM frame as the idle time slot in the embodiment of the present invention. detailed description
  • the present invention utilizes GSM.
  • the intra-frame idle time slot detects the DwPTS of the TD-SCDMA frame.
  • the 26th frame is the idle frame, and cycles through this 26 frame period. Therefore, the idle time slot in the GSM frame is used to detect that the DwPTS is independent of the idle frame.
  • the GSM multiframe is regarded as a cycle of 13 frames for the sake of convenience.
  • a GSM frame is divided into 8 time slots. Since the two service time slot configurations in the GSM connection state must be separated by 2 time slots, referring to FIG. 5, this embodiment configures the service time slots of the GSM connection state as TN0 and TN3. , TN1 and TN2 are used for receiving signal strength indication (RSSI) measurement, so that part or all of the four consecutive idle time slots TN4-TN7 can be used to receive TD-SCDMA frame data.
  • RSSI signal strength indication
  • the DwPTS of the TD-SCDMA frame is detected; the combination of part or all of the four idle slots is the idle window of GSM, and the length of the idle window is determined by the number of idle slots used.
  • the TD-SCDMA frame data observed in the idle window of each frame of the GSM is delayed by a fixed time T.
  • T the time of observing the TD-SCDMA radio frame between two adjacent GSM frames
  • T the time of T
  • T QSM /13 5/13ms
  • the TD-SCDMA frame data of the GSM 13 frame period is shifted backward relative to the GSM idle window, so the repetition period of the two system timing relationships is T esM *13 or T TDS *12.
  • this embodiment assumes that the initial timing offset between the two systems is 0, and the timing position relationship of the TD-SCDMA frame corresponding to 13 consecutive radio frames in one multiframe of GSM is shown in FIG.
  • the GSM idle window in order to ensure that the GSM idle window is slid and detected relative to the TD-SCDMA frame, the GSM idle window must be used once or more in every 13 frames of GSM.
  • the complete DwPTS is detected once.
  • the GSM frame is divided into 12 segments, each segment is 5/13 ms (the GSM sliding window slides 5/13 ms each time), that is, the length of each idle window relative to the sliding.
  • the sliding window In the process of sliding and detecting the GSM idle window relative to the TD-SCDMA frame, the sliding window must ensure that the DwPTS is included, and the DwPTS may appear in any of the 12 locations in the GSM frame as shown in FIG.
  • the GSM/TD-SCDMA frequency is switched back and forth once in the hardware, and the radio frequency needs a frequency stabilization time; the uplink advance time in the uplink service time slot is used to offset the path delay.
  • the larger the delay, the larger the amount of advancement of the transmission; plus the frequency stabilization time, the amount of uplink transmission advance may be anywhere in the location area shown in FIG.
  • the GSM idle window contains n adjacent idle slots, and the timing delay of the TD-SCDMA radio subframe between two adjacent GSM frames is T; the frequency required to receive TD-SCDMA data in the GSM system state.
  • the DwPTS is continuously transmitted and located at the illustrated position, that is, when the trailing edge of the GSM idle window is tangent to the DwPTS leading edge of the TD-SCDMA, the DwPTS is required to be detected.
  • the longest time is; using the later slots in the GSM idle time slot (TN4-TN7) also increases the time to detect DwPTS.
  • GSM idle frames may be used.
  • the idle window composed of different idle time slots may have multiple frames in the 13 frame period to detect DwPTS; assuming that there are n idle time slots, GSM is in one cycle of 13 frames. Within, the GSM idle window can observe the complete DwPTS GSM frame number:
  • the DwPTS when the GSM idle window detects DwPTS discontinuous transmission, the DwPTS will be detected in the frame after the GSM idle window detects the DwPTS for the first time, and the GSM idle window will be continuously detected when the DwPTS is continuously transmitted.
  • the detection time is increased correspondingly to the continuous transmission of DwPTS, and the number of frames detected by the frame in DwPTS is less than that in the case of continuous transmission of DwPTS. It is related to the idle window length detected by several frames, and the longer the window length, the more the number of times.
  • the communication device in this embodiment mainly includes a communication unit 120, a GSM system processing unit 121, a TD-SCDMA system processing unit 122, a synchronization unit 123, and a system switching unit 124.
  • the GSM system processing unit 121 configured to receive or transmit service data in a radio frequency band of the GSM system in a service time slot of the GSM frame in a GSM system connection mode, when the GSM frame is idle Receiving TD-SCDMA data in the RF band of the TD-SCDMA system and detecting DwPTS therefrom; the TD-SCDMA system processing unit 122 is configured to send and receive information through the communication unit 120 in the TD-SCDMA system connection mode; The unit 123 is configured to perform synchronization processing of the GSM system processing unit 121 and the TD-SCDMA system processing unit 122 according to the detected DwPTS in the GSM system connection mode.
  • the system switching unit 124 is configured to complete the GSM system processing unit 121. System switching between the processing unit 122 and the TD-SCDMA system.
  • the non-idle time slot in the GSM frame is sent and received by the GSM system processing unit 121 through the communication unit 120, and when the time slot corresponding to the idle time slot in the GSM frame is reached, The GSM system processing unit 121 receives TD-SCDMA data from the radio frequency band of the GSM system to the radio frequency band of the TD-SCDMA system, and reaches the end of the idle time slot. At the point in time, the GSM system processing unit 121 switches from the radio frequency band of the TD-SCDMA system to the radio frequency band of the GSM system to transmit and receive information.
  • the GSM system processing unit 121 After receiving the TD-SCDMA data, the GSM system processing unit 121 calls the processing function of the TD-SCDMA to detect the DwPTS in the TD-SCDMA data. After the GSM system processing unit 121 detects the DwPTS, the synchronization unit 123 further performs the subsequent synchronization processing procedure by using the DwPTS.
  • the present invention performs inter-radio-switching and detection of DwPTS in TD-SCDMA data only within the GSM system processing unit 121, and does not involve system switching between the GSM system processing unit and the TD-SCDMA system processing unit.
  • the GSM system processing unit in this embodiment includes a communication interface 130, a GSM system radio unit 131, a TD-SCDMA system radio unit 132, and a control unit 133; wherein: the communication interface 130 is used to connect to the The communication unit 120 provides a communication unit 120 with a service for transmitting and receiving data; the GSM system radio unit 131 is configured for the GSM system processing unit to receive or transmit service data in a radio frequency band of the GSM system in a service time slot of the GSM frame; The TD-SCDMA system radio unit 132 is configured to receive, by the GSM system processing unit, TD-SCDMA data in a radio frequency band of the TD-SCDMA system in an idle time slot of the GSM frame; the control unit 133, configured to control the GSM system Radio frequency switching between the radio unit 131 and the TD-SCDMA system radio unit 132, and detecting the DwPTS in the received TD-SCDMA data.
  • the communication interface 130 is used to connect to the The
  • the non-idle time slot of the GSM system processing unit in the GSM frame is sent and received by the GSM system radio frequency unit 131 over the GSM radio frequency band through the communication interface 130, and reaches the starting time point corresponding to the idle time slot in the GSM frame.
  • the control unit 133 performs radio frequency switching of the GSM system radio frequency unit 131 to the TD-SCDMA system radio unit 132, and the TD-SCDMA system radio unit 132 receives the TD-SCDMA data on the TD-SCDMA radio frequency band, when the idle time slot is reached.
  • the control unit 133 performs radio frequency switching of the TD-SCDMA system radio unit 132 to the GSM system radio unit 131, and the GSM system radio unit 131 transmits and receives information on the radio frequency band of the GSM system.
  • the control unit 133 calls the processing function of the TD-SCDMA to detect the DwPTS in the TD-SCDMA data.
  • the gap detection DwPTS is taken as an example.
  • the processing flow for detecting DwPTS in a GSM frame is as follows:
  • Step 140 When the TN0 time slot arrives, the GSM system processing unit transmits the service data on the GSM system frequency band.
  • Step 141 When the TN1 time slot arrives, the GSM system processing unit measures the RSSI on the GSM system frequency band.
  • Step 142 When the TN2 time slot arrives, the GSM system processing unit measures the RSSI on the GSM system frequency band.
  • Step 143 When the TN3 time slot arrives, the GSM system processing unit transmits the service data on the GSM system frequency band.
  • Step 144 At the initial moment when the TN4 time slot arrives, the GSM system processing unit switches to the radio frequency band of the TD-SCDMA system, and receives the TD-SCDMA data in four time slots TN4 to TN7.
  • Step 145 The time point at which the TN7 time slot ends is reached, and the GSM system processing unit switches to the radio frequency band of the GSM system to continue transmitting data. After receiving the data of TD-SCDMA, the GSM system processing unit calls the processing function of TD-SCDMA to detect the DwPTS in the TD-SCDMA data.
  • the GSM system processing unit After receiving the TD-SCDMA data including the complete DwPTS, the GSM system processing unit can accurately obtain the synchronization position of the TD-SCDMA system by applying the existing method of finding the power ratio sliding window and the method of determining the correlation power. Codeword information, which realizes the initial synchronization between the GSM system and the TD-SCDMA system, thus preparing for subsequent TD-SCDMA system measurement, GSM and TD-SCDMA system handover, and also for synchronous adjustment and automatic gain control. And repeated inspections, etc.
  • the idle time slot in the GSM frame can also be configured as 2 or 3 or the idle time slot is arbitrary in one frame.
  • the processing flow at this time is similar to the above process.
  • the present invention fully utilizes the idle time slot in the GSM connection state, and according to the configuration of the idle time slot, the DwPTS can be detected in the 13 frame period of the GSM in a short time, thereby solving the GSM connection.
  • the state only relying on GSM idle frames to find DwPTS may never be found, and it is necessary to complete the measurement of TD-SCDMA system and the necessary handover between GSM and TD-SCDMA systems, which is beneficial to the whole process.
  • Improve system reliability by performing necessary steps such as synchronization adjustment, automatic gain control (AGC), and repeat inspection.
  • the present invention supports future new features such as Blanking rules, etc.
  • Blanking The spirit and scope of the Ming.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Description

GSM系统与 TD-SCDMA系统初始同歩的方法及装置 技术领域
本发明涉及移动通信领域, 尤其涉及在 GSM (全球移动通信系统) 系统连 接模式下与 TD-SCDMA (时分同步码分多址) 系统初始同步的方法及装置。 背景技术
如图 1所示, GSM无线帧长为 60/13ms, 第 13帧为控制帧, 第 26帧为空 闲帧, 并以此 26帧的周期循环。 如图 2所示, TD-SCDMA无线帧分为两个子 帧, 每个子帧长为 5ms, 终端在 GSM系统连接状态下, GSM空闲帧一旦检测 到图中 TD-SCDMA帧内的下行同步码( DwPTS ), 再通过相应的同步处理即可 实现与 TD-SCDMA系统同步。
如图 3所示为 GSM的无线帧和 TD-SCDMA的无线子帧存在的关系。 具体 的, 两者之间存在如下关系:
TGSM = 60/13 = 12
T 5 13
其中 ^为 GSM的无线帧长, 而 TTDS为对应的 TD-SCDMA无线子帧长。
TD-SCDMA/GSM双模系统中, 终端在 GSM连接状态下, GSM空闲帧出 现周期为 26帧,而 TD-SCDMA的 24个子帧( 120ms )和 GSM的 26个帧( 120ms ) 的周期完全相同,这样如果只使用 GSM的空闲帧来接收 TD-SCDMA帧的数据, 就有可能一直检测不到 DwPTS。
具体地来讲, 如图 4所示的 TD-SCDMA帧和 GSM帧示意图, 位于上面的 是 TD-SCDMA帧,位于下面的是 GSM帧。 GSM从帧头开始截取, TD-SCDMA 从与 GSM帧头的同一时刻开始截取, 可能是 TD-SCDMA帧的任意位置。 由于 TD-SCDMA帧比 GSM帧的帧长更长并且 GSM的 26帧和 TD-SCDMA的 24帧 完全对齐, 当 DwPTS连续发送时, 如果 DwPTS处于图 4中所示的位置, 则利 用 GSM空闲帧将无法检测到 DwPTS。
当 DwPTS不连续发送时, 即使 DwPTS不出现在图 4中所示位置, 也可能 会出现永远检测不到 DwPTS的情况,这是由于 GSM每 26帧有一个空闲帧,且 GSM 的 26 帧和 TD-SCDMA 的 24 个子帧完全对齐, 以此类推, GSM 的第 ( N*26-l )帧也即空闲帧对应着 TD-SCDMA本地帧号的第(N*24-l )子帧。 如 果 TD-SCDMA本地帧号的第 (N*24-l ) 帧为偶数帧对应于 GSM空闲帧, 而 DwPTS在奇数帧发送, 或者 TD-SCDMA本地帧号的第 (N*24-l ) 帧为奇数帧 对应于 GSM空闲帧, 而 DwPTS在偶数帧发送, 则 GSM连接状态下只利用空 闲帧将一直无法检测出 TD-SCDMA帧的 DwPTS。
由于 GSM每 26帧才能检测一次 DwPTS, 检测耗费时间较长, 这样将无 法实现同步调整、 自动增益控制 (AGC ) 以及重复检验等必要步骤, 导致信号 质量不容易控制, 可靠性低; 而且对于将来新增的特性如消隐 ( blanking )规则, 目前的方法无法支持。 发明内容
本发明提供一种在 GSM系统连接模式下与 TD-SCDMA系统初始同步的方 法及装置,用以解决现有技术中 TD-SCDMA/GSM双模终端在 GSM连接状态下 检测 TD-SCDMA帧时, 可能会出现检测不到 DwPTS的情况和检测耗费时间较 长的问题;进一步解决现有技术检测 DwPTS的可靠性低和无法支持新增特性的 问题。
本发明提供以下技术方案:
一种在 GSM系统连接状态下检测 TD-SCDMA帧的 DwPTS的方法, 包括 步骤:
处于 GSM系统连接状态的通信装置在 GSM帧的业务时隙内以 GSM系统 的射频频带接收或发送业务数据, 并且在所述 GSM 帧的空闲时隙内以 TD-SCDMA系统的射频频带接收 TD-SCDMA数据; 以及
所述通信装置从接收到的 TD-SCDMA数据中检测 DwPTS。
根据上述方法:
所述 GSM帧至少具有两个接收 TD-SCDMA数据的空闲时隙。 所述至少两个空闲时隙为 GSM帧中连续的时隙。
在所述空闲时隙所对应的起始时间点从 GSM 系统的射频频带切换到 TD-SCDMA 系统的射频频带上, 并在所述空闲时隙所对应的结束时间点从 TD-SCDMA系统的射频频带切换到 GSM系统的射频频带上。
所述通信装置在 GSM 系统连接状态下调用 TD-SCDMA 的处理函数检测 TD-SCDMA信号中的 DwPTS。
一种 TD-SCDMA/GSM双模系统初始同步的方法, 该方法包括步骤: 处于 GSM系统连接状态的通信装置在 GSM帧的业务时隙内以 GSM系统 的射频频带接收或发送业务数据, 并且在所述 GSM 帧的空闲时隙内以 TD-SCDMA系统的射频频带接收 TD-SCDMA数据;
所述通信装置从接收到的 TD-SCDMA数据中检测 DwPTS; 以及
所述通信装置根据检测到的 DwPTS进行与 TD-SCDMA系统的同步处理。 根据上述方法:
所述 GSM帧至少具有两个接收 TD-SCDMA数据的空闲时隙。
所述至少两个空闲时隙为 GSM帧中连续的时隙。
在所述空闲时隙所对应的起始时间点从 GSM 系统的射频频带切换到 TD-SCDMA 系统的射频频带上, 并在所述空闲时隙所对应的结束时间点从 TD-SCDMA系统的射频频带切换到 GSM系统的射频频带上。
所述通信装置在 GSM 系统连接状态下调用 TD-SCDMA 的处理函数检测 TD-SCDMA信号中的 DwPTS。
一种 GSM系统处理装置, 包括:
通信接口, 用于接收和发送信息;
GSM系统射频单元,用于在 GSM帧的业务时隙内以 GSM系统的射频频带, 经所述通信接口接收或发送业务数据;
TD-SCDMA系统射频单元,用于在 GSM帧的空闲时隙内以 TD-SCDMA系 统的射频频带, 经所述通信接口接收 TD-SCDMA数据;
控制单元, 用于控制所述 GSM系统射频单元和 TD-SCDMA系统射频单元 之间的射频切换, 以及检测接收到的 TD-SCDMA数据中的 DwPTS。
所述 TD-SCDMA系统射频单元至少在所述 GSM帧中的两个空闲时隙接收
TD-SCDMA数据。
所述空闲时隙为 G SM帧中连续的空闲时隙。
所述 GSM系统处理装置通过所述控制单元在所述空闲时隙所对应的起始时 间点从 GSM系统射频单元切换到 TD-SCDMA系统射频单元上, 并在所述空闲 时隙所对应的结束时间点从 TD-SCDMA系统射频单元切换到 GSM系统射频单 元上。
所述控制单元接收到的 TD-SCDMA数据后, 调用 TD-SCDMA的处理函数 检测 TD-SCDMA信号中的 DwPTS。
一种通信装置, 包括:
通信单元, 用于接收和发送信息;
GSM系统处理单元, 用于在 GSM系统连接模式下, 在 GSM帧的业务时隙 内以 GSM系统的射频频带,经所述通信单元接收或发送业务数据,在所述 GSM 帧的空闲时隙内以 TD-SCDMA 系统的射频频带, 经所述通信单元接收 TD-SCDMA数据并从中检测 DwPTS;
TD-SCDMA系统处理单元, 用于在 TD-SCDMA系统连接模式下通过通信 单元收发信息;
同步单元, 用于在 GSM系统连接模式下, 根据检测到的 DwPTS进行所述 GSM系统处理单元与所述 TD-SCDMA系统处理单元的同步处理;
系统切换单元, 用于完成所述 GSM系统处理单元和 TD-SCDMA系统处理 单元之间的切换。
所述 GSM系统处理单元包括:
通信接口, 用于接收和发送信息;
GSM系统射频单元,用于在 GSM帧的业务时隙内以 GSM系统的射频频带, 经所述通信接口接收或发送业务数据;
TD-SCDMA系统射频单元,用于在 GSM帧的空闲时隙内以 TD-SCDMA系 统的射频频带, 经所述通信接口接收 TD-SCDMA数据;
控制单元, 用于控制所述 GSM系统射频单元和 TD-SCDMA系统射频单元 之间的射频切换, 以及检测接收到的 TD-SCDMA数据中的 DwPTS。
所述 GSM 系统处理单元至少在所述 GSM 帧中的两个空闲时隙接收 TD-SCDMA数据。
所述空闲时隙为 G SM帧中连续的空闲时隙。
所述 GSM系统处理单元在所述空闲时隙所对应的起始时间点从 GSM系统 的射频频带切换到 TD-SCDMA系统的射频频带上,并在所述空闲时隙所对应的 结束时间点从 TD-SCDMA系统的射频频带切换到 GSM系统的射频频带上。
所述 GSM系统处理单元调用 TD-SCDMA的处理函数检测 TD-SCDMA信 号中的 DwPTS。
本发明有益效果如下:
本发明充分利用了 GSM连接状态下的帧内空闲时隙来检测 TD-SCDMA帧 的 DwPTS, 根据空闲时隙的配置, 可以在较短的时间内在 GSM的 13帧周期中 检测到 DwPTS, 从而解决了在 GSM连接状态下只依靠 GSM空闲帧找 DwPTS 可能会永远找不到的问题。
由于 DwPTS的快速被检测而实现的 GSM/TD-SCDMA双模系统同步,为完 成对 TD-SCDMA系统的测量、 GSM与 TD-SCDMA系统间切换做好了必要的准 备, 也利于在整个同步过程中实现同步调整、 自动增益控制 (AGC ) 以及重复 检验等必要的步骤, 提高系统的可靠性。
本发明支持 TD-SCDMA基站不连续发送 DwPTS, 并且支持将来新增的特 性如 blanking规则等。 附图说明
图 1为背景技术中 GSM系统业务复帧结构示意图;
图 2为背景技术中 TD-SCDMA系统的帧结构示意图;
图 3为背景技术中 GSM/TD-SCDMA帧定时关系示意图; 图 4为背景技术中 DwPTS连续发送时的 TD-SCDMA帧和 GSM帧示意图; 图 5为本发明实施例中 GSM连接状态下 GSM帧的时隙配置示意图; 图 6为本发明实施例中 GSM空闲窗内观测 TD-SCDMA无线帧的定时变化 示意图;
图 7为本发明实施例中 TD-SCDMA无线帧相对于 GSM帧的定时关系示意 图; 图 9为本发明实施例中 GSM上行业务时隙的发射提前量和频率稳定时间示 意图;
图 10为本发明实施例中利用 GSM空闲窗检测 DwPTS连续发送示意图; 图 11为本发明实施例中利用 GSM空闲窗检测 DwPTS不连续发送示意图; 图 12为本发明实施例中通信装置的结构示意图;
图 13为本发明实施例中的 GSM系统处理单元的结构示意图;
图 14为本发明实施例中使用 GSM帧中靠后的连续 4个时隙作为空闲时隙 检测 DwPTS时 GSM每一帧的处理流程图。 具体实施方式
为了解决现有技术中 TD-SCDMA/GSM双模终端在 GSM连接状态下检测 TD-SCDMA帧时, 可能检测不到下行同步码 DwPTS的情况和检测耗费时间较 长等问题, 本发明利用 GSM的帧内空闲时隙来检测 TD-SCDMA帧的 DwPTS。
由于 GSM的业务复帧中的第 13帧为控制帧,第 26帧为空闲帧,并以此 26 帧的周期循环。 因此, 利用 GSM帧中的空闲时隙来检测 DwPTS与空闲帧无关, 为方便起见, 本实施例将 GSM复帧看作是以 13帧为周期循环。
一个 GSM帧分为 8个时隙, 由于在 GSM连接状态下的 2个业务时隙配置 必须间隔 2个时隙,参阅图 5,本实施例将 GSM连接状态的业务时隙配置为 TN0 和 TN3 , TN1 和 TN2用来做接收信号强度指示 (RSSI )测量, 这样就可以用 TN4-TN7这 4个连续的空闲时隙的部分或者全部来接收 TD-SCDMA帧数据, 检测 TD-SCDMA帧的 DwPTS;这 4个空闲时隙的部分或者全部的结合即为 GSM 的空闲窗, 空闲窗的长度由所使用的空闲时隙数决定。
参阅图 6, 由于 GSM帧与 TD-SCDMA帧的帧长不同, GSM每一帧的空闲 窗内观测到的 TD-SCDMA帧数据都会推迟一个固定的时间 T。 如果以 GSM系 统为定时参照基准, 则在两次相邻的 GSM帧之间观测 TD-SCDMA无线帧的定 时会固定推迟 T=TQSM/13 ( 5/13ms )的时间, 即图 6中所示的 GSM的 13帧周期 内 TD-SCDMA帧数据相对于 GSM空闲窗往后的移位, 因此两个系统定时关系 的重复周期为 TesM *13或者 TTDS*12。 不失一般性,本实施例假设两个系统间的初始定时偏差为 0,则 TD-SCDMA 帧对应于 GSM的 1个复帧内 13个连续无线帧的定时位置关系参见图 7所示。
根据所述 TD-SCDMA相对于 GSM的定时关系, 为保证在 GSM空闲窗相 对于 TD-SCDMA帧滑动并进行检测的过程中, GSM每 13 帧的周期内, 利用 GSM空闲窗一定可以一次或者多次检测到完整的 DwPTS, 本实施例将 GSM的 1帧分为 12段, 每段为 5/13ms ( GSM滑动窗每次滑动 5/13 ms ), 即每次空闲窗 相对滑动的长度, 则在 GSM空闲窗相对于 TD-SCDMA帧滑动并进行检测的过 程中,滑动窗一定可以保证包含 DwPTS, DwPTS可能出现在如图 8所示的 GSM 帧内 12个任意位置。
参阅图 9 , 由于 GSM 系统状态下要接收 TD-SCDMA数据, 在硬件上 GSM/TD-SCDMA来回切换频率一次,射频需要频率稳定时间;上行业务时隙中 的发射提前量用以抵消路径延迟, 延迟越大发射提前量越大; 加上频率稳定时 间, 上行发送提前量可能在图 9所示的位置区域的任意位置。
假设 GSM空闲窗所包含的相邻空闲时隙为 n个, 两次相邻的 GSM帧之间 观测 TD-SCDMA无线子帧的定时延迟为 T; GSM系统状态下接收 TD-SCDMA 数据需要的频率稳定时间和为 0.2 2=0.4ms左右; DwPTS长度为( 64ms/1.28e6 ); 则当空闲窗长大于等于这三个时间的总和, 也即:
15ms 、5ms 64ms
η ——>-— + 0.4ms + -—— [1]
26 13 1.28e6 L J 这样就可以保证 DwPTS完整的包含于某些空闲窗中; 而 64ms/1.28e6相对 于 5ms/13和 0.4ms是一个很小的数量级,故在计算中可以忽略不记, 由此得到: n ¾ .36 [2] 由于 n为整数, 因此检测 TD-SCDMA的 DwPTS至少需要利用 GSM的 2 个空闲时隙, 最多则可以利用 4个空闲时隙。
参阅图 10所示,对于每个不同时隙长度组成的空闲窗来说, DwPTS连续发 送且位于图示位置, 即 GSM空闲窗后沿与 TD-SCDMA的 DwPTS前沿相切时, 检测 DwPTS所需的时间最长; 使用 GSM空闲时隙 ( TN4-TN7 ) 中靠后的时隙 也会增加检测 DwPTS的时间。
在检测 DwPTS的过程中, 在上述最坏的情况下, 用 GSM的两个空闲时隙 ( TN6和 TN7 )检测到完整的 DwPTS所需时间为:
6 60 5 ( 60
— X + 0.4 / 5—— + 1 = 12.04 [3] 8 13 13 ) 13
即至多需要 13帧时间即可检测到完整的 DwPTS , 此时可能会用到 GSM 闲帧。
同样的, 在上述最坏的情况下, 用 GSM的 4个空闲时隙(TN4~TN7 )检测 到完整的 DwPTS所需时间为:
4 60 5 Α
5. 60、
- X + 0.4 | / | + 1 = 9.04 [4]
8 13 13 ) 13 ,
即至多需要 10帧时间即可检测到完整的 DwPTS。
由于公式 1的要求, 由不同空闲时隙组成的空闲窗可能会在 13帧的周期内 有多个帧可以检测到 DwPTS; 假设使用的空闲时隙为 n个, 则 GSM在 13帧的 一个周期内, GSM的空闲窗可以观测到完整的 DwPTS的 GSM帧数为:
Figure imgf000010_0001
其中 L」表示向下取整; 由公式 5可以看出, 频率稳定时间对可检测的帧数 影响较大; 根据公式 5 , 在 GSM空闲窗的 13帧的周期中, 空闲窗的空闲时隙数 与能够连续检测到 DwPTS的帧数对应关系如下表所示:。 空闲时隙数 可连续检测帧数
2 1
3 3
4 4 参阅图 11所示, GSM空闲窗检测 DwPTS不连续发送时, 当 GSM空闲窗 第一次检测到 DwPTS后将会隔帧检测到 DwPTS,而不同于 DwPTS连续发送时 GSM空闲窗会连续检测到 DwPTS的情况; 因为是隔帧才能检测到 DwPTS, 所 以此时检测时间相比 DwPTS连续发送会相应增加, 隔帧检测到 DwPTS的帧数 也会少于 DwPTS连续发送时的情况, 具体可以连续几次隔帧检测到 DwPTS与 空闲窗长有关, 窗长越长, 则次数越多。
根据上述规律, 本实施例利用 GSM的帧内空闲时隙来检测 DwPTS。 参阅 图 12, 本实施例中的通信装置主要包括通信单元 120、 GSM系统处理单元 121、 TD-SCDMA系统处理单元 122、 同步单元 123和系统切换单元 124; 其中: 所 述通信单元 120 , 用于接收和发送信息; 所述 GSM系统处理单元 121 , 用于在 GSM系统连接模式下,在 GSM帧的业务时隙内以 GSM系统的射频频带接收或 发送业务数据, 在所述 GSM帧的空闲时隙内以 TD-SCDMA系统的射频频带接 收 TD-SCDMA数据并从中检测 DwPTS; 所述 TD-SCDMA系统处理单元 122 , 用于在 TD-SCDMA系统连接模式下通过通信单元 120收发信息;所述同步单元 123 , 用于在 GSM系统连接模式下, 根据检测到的 DwPTS进行 GSM系统处理 单元 121与 TD-SCDMA系统处理单元 122的同步处理;所述系统切换单元 124 , 用于完成 GSM系统处理单元 121和 TD-SCDMA系统处理单元 122之间的系统 切换。
当所述通信装置处于 GSM系统连接模式下, 在 GSM帧中的非空闲时隙由 GSM系统处理单元 121通过通信单元 120收发信息, 当到达 GSM帧内空闲时 隙所对应的起始时间点, GSM系统处理单元 121从 GSM系统的射频频带切换 到 TD-SCDMA系统的射频频带上接收 TD-SCDMA数据, 当到达空闲时隙结束 的时间点, GSM系统处理单元 121从 TD-SCDMA系统的射频频带切换到 GSM 系统的射频频带上收发信息。 在接收到 TD-SCDMA数据后, GSM系统处理单 元 121调用 TD-SCDMA的处理函数检测 TD-SCDMA数据中的 DwPTS。在 GSM 系统处理单元 121检测到 DwPTS后, 同步单元 123进一步利用该 DwPTS进行 后续的同步处理流程。
本发明只在 GSM 系统处理单元 121 内部完成射频间切换以及检测 TD-SCDMA数据中的 DwPTS , 而不涉及 GSM系统处理单元与 TD-SCDMA系 统处理单元之间的系统切换。
本实施例中的 GSM系统处理单元如图 13所示, 包括通信接口 130、 GSM 系统射频单元 131、 TD-SCDMA系统射频单元 132、 控制单元 133; 其中: 所述 通信接口 130, 用于连接所述通信单元 120, 为通信单元 120提供收发数据的业 务; 所述 GSM系统射频单元 131 , 用于 GSM系统处理单元在 GSM帧的业务时 隙内以 GSM系统的射频频带接收或发送业务数据; 所述 TD-SCDMA系统射频 单元 132 ,用于 GSM系统处理单元在 GSM帧的空闲时隙内以 TD-SCDMA系统 的射频频带接收 TD-SCDMA数据; 所述控制单元 133 , 用于控制所述 GSM系 统射频单元 131和 TD-SCDMA系统射频单元 132之间的射频切换,以及检测接 收到的 TD-SCDMA数据中的 DwPTS。
所述 GSM系统处理单元在 GSM帧中的非空闲时隙由所述 GSM系统射频 单元 131在 GSM射频频带上通过通信接口 130收发信息, 当到达 GSM帧内空 闲时隙所对应的起始时间点,所述控制单元 133进行 GSM系统射频单元 131到 TD-SCDMA系统射频单元 132的射频切换, 由 TD-SCDMA系统射频单元 132 在 TD-SCDMA射频频带上接收 TD-SCDMA数据, 当到达空闲时隙结束的时间 点, 所述控制单元 133进行 TD-SCDMA系统射频单元 132到 GSM系统射频单 元 131的射频切换, 由 GSM系统射频单元 131在 GSM系统的射频频带上收发 信息。 在接收到 TD-SCDMA的数据后, 所述控制单元 133调用 TD-SCDMA的 处理函数检测 TD-SCDMA数据中的 DwPTS。
参阅图 14所示, 以图 5中使用 GSM帧中靠后的连续 4个时隙作为空闲时 隙检测 DwPTS为例, 在 GSM帧中检测 DwPTS的处理流程如下:
步骤 140、 TN0时隙到达时 GSM系统处理单元在 GSM系统频带上发送业 务数据。
步骤 141、 TN1 时隙到达时 GSM 系统处理单元在 GSM 系统频带上测量 RSSI。
步骤 142、 TN2 时隙到达时 GSM 系统处理单元在 GSM 系统频带上测量 RSSI。
步骤 143、 TN3时隙到达时 GSM系统处理单元在 GSM系统频带上发送业 务数据。
步骤 144、TN4时隙到达的初始时刻, GSM系统处理单元切换到 TD-SCDMA 系统的射频频带上, 在 TN4至 TN7四个时隙内接收 TD-SCDMA数据。
步骤 145、 TN7时隙结束的时间点到达, GSM系统处理单元切换到 GSM系 统的射频频带上继续发送数据。 在接收到 TD-SCDMA的数据后, GSM系统处 理单元调用 TD-SCDMA的处理函数检测 TD-SCDMA数据中的 DwPTS。
GSM系统处理单元在接收到包含完整的 DwPTS的 TD-SCDMA数据后,应 用现有的求功率比值滑动窗的方法以及求相关功率的方法后, 即可准确地得到 TD-SCDMA系统的同步位置以及码字信息,从而实现 GSM系统与 TD-SCDMA 系统的初始同步,从而为后续的 TD-SCDMA系统测量、 GSM与 TD-SCDMA系 统间切换做好必要的准备, 也可以进行同步调整、 自动增益控制和重复检验等。
GSM帧中空闲时隙还可配置为 2个或 3个或空闲时隙在一帧中的位置任意 , 此时的处理流程与上述流程类似。
从上述实施例可知, 本发明充分利用了 GSM连接状态下的空闲时隙, 根据 空闲时隙的配置, 可以在较短的时间内在 GSM的 13帧周期中检测到 DwPTS , 从而解决了在 GSM连接状态下只依靠 GSM空闲帧找 DwPTS可能会永远找不 到的问题,也为完成对 TD-SCDMA系统的测量、 GSM与 TD-SCDMA系统间切 换做好必要的准备, 有利于在整个过程中实现同步调整、 自动增益控制(AGC ) 以及重复检验等必要的步骤, 提高系统可靠性。 本发明支持将来新增的特性如 blanking规则等。 明的精神和范围。 这样, 倘若对本发明的这些修改和变型属于本发明权利要求 及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权利要求
1、 一种在 GSM系统连接状态下检测 TD-SCDMA帧的 DwPTS的方法, 其 特征在于, 包括步骤:
处于全球移动通信系统 GSM系统连接状态的通信装置在 GSM帧的业务时 隙内以 GSM系统的射频频带接收或发送业务数据, 并且在所述 GSM帧的空闲 时隙内以时分同步码分多址 TD-SCDMA 系统的射频频带接收 TD-SCDMA数 据; 以及
所述通信装置从接收到的 TD-SCDMA数据中检测下行同步码 DwPTS。
2、 如权利要求 1所述的方法, 其特征在于, 所述 GSM帧至少具有两个接 收 TD-SCDMA数据的空闲时隙。
3、如权利要求 2所述的方法, 其特征在于, 所述至少两个空闲时隙为 GSM 帧中连续的时隙。
4、 如权利要求 3所述的方法, 其特征在于, 在所述空闲时隙所对应的起始 时间点从 GSM系统的射频频带切换到 TD-SCDMA系统的射频频带上, 并在所 述空闲时隙所对应的结束时间点从 TD-SCDMA系统的射频频带切换到 GSM系 统的射频频带上。
5、 如权利要求 1所述的方法, 其特征在于, 所述通信装置在 GSM系统连 接状态下调用 TD-SCDMA的处理函数检测 TD-SCDMA信号中的 DwPTS。
6、 一种 TD-SCDMA/GSM双模系统初始同步的方法, 其特征在于, 该方法 包括步骤:
处于 GSM系统连接状态的通信装置在 GSM帧的业务时隙内以 GSM系统 的射频频带接收或发送业务数据, 并且在所述 GSM 帧的空闲时隙内以 TD-SCDMA系统的射频频带接收 TD-SCDMA数据;
所述通信装置从接收到的 TD-SCDMA数据中检测 DwPTS; 以及
所述通信装置根据检测到的 DwPTS进行与 TD-SCDMA系统的同步处理。
7、 如权利要求 6所述的方法, 其特征在于, 所述 GSM帧至少具有两个接 收 TD-SCDMA数据的空闲时隙。
8、如权利要求 7所述的方法, 其特征在于, 所述至少两个空闲时隙为 GSM 帧中连续的时隙。
9、 如权利要求 8所述的方法, 其特征在于, 在所述空闲时隙所对应的起始 时间点从 GSM系统的射频频带切换到 TD-SCDMA系统的射频频带上, 并在所 述空闲时隙所对应的结束时间点从 TD-SCDMA系统的射频频带切换到 GSM系 统的射频频带上。
10、 如权利要求 6所述的方法, 其特征在于, 所述通信装置在 GSM系统连 接状态下调用 TD-SCDMA的处理函数检测 TD-SCDMA信号中的 DwPTS。
11、 一种 GSM系统处理装置, 其特征在于, 包括:
通信接口, 用于接收和发送信息;
GSM系统射频单元,用于在 GSM帧的业务时隙内以 GSM系统的射频频带, 经所述通信接口接收或发送业务数据;
TD-SCDMA系统射频单元,用于在 GSM帧的空闲时隙内以 TD-SCDMA系 统的射频频带, 经所述通信接口接收 TD-SCDMA数据;
控制单元, 用于控制所述 GSM系统射频单元和 TD-SCDMA系统射频单元 之间的射频切换, 以及检测接收到的 TD-SCDMA数据中的 DwPTS。
12、 如权利要求 11所述的装置, 其特征在于, 所述 TD-SCDMA系统射频 单元至少在所述 GSM帧中的两个空闲时隙接收 TD-SCDMA数据。
13、 如权利要求 12所述的装置, 其特征在于, 所述空闲时隙为 GSM帧中 连续的空闲时隙。
14、 如权利要求 13所述的装置, 其特征在于, 所述 GSM系统处理装置通 过所述控制单元在所述空闲时隙所对应的起始时间点从 GSM系统射频单元切换 到 TD-SCDMA 系统射频单元上, 并在所述空闲时隙所对应的结束时间点从 TD-SCDMA系统射频单元切换到 GSM系统射频单元上。
15、 如权利要求 11至 14任一项所述的装置, 其特征在于, 所述控制单元 接收到的 TD-SCDMA数据后, 调用 TD-SCDMA的处理函数检测 TD-SCDMA 信号中的 DwPTS。
16、 一种通信装置, 其特征在于, 包括:
通信单元, 用于接收和发送信息;
GSM系统处理单元, 用于在 GSM系统连接模式下, 在 GSM帧的业务时隙 内以 GSM系统的射频频带,经所述通信单元接收或发送业务数据,在所述 GSM 帧的空闲时隙内以 TD-SCDMA 系统的射频频带, 经所述通信单元接收 TD-SCDMA数据并从中检测 DwPTS;
TD-SCDMA系统处理单元, 用于在 TD-SCDMA系统连接模式下通过通信 单元收发信息;
同步单元, 用于在 GSM系统连接模式下, 根据检测到的 DwPTS进行所述 GSM系统处理单元与所述 TD-SCDMA系统处理单元的同步处理;
系统切换单元, 用于完成所述 GSM系统处理单元和 TD-SCDMA系统处理 单元之间的切换。
17、 如权利要求 16所述的装置, 其特征在于, 所述 GSM系统处理单元包 括:
通信接口, 用于接收和发送信息;
GSM系统射频单元,用于在 GSM帧的业务时隙内以 GSM系统的射频频带, 经所述通信接口接收或发送业务数据;
TD-SCDMA系统射频单元,用于在 GSM帧的空闲时隙内以 TD-SCDMA系 统的射频频带, 经所述通信接口接收 TD-SCDMA数据;
控制单元, 用于控制所述 GSM系统射频单元和 TD-SCDMA系统射频单元 之间的射频切换, 以及检测接收到的 TD-SCDMA数据中的 DwPTS。
18、 如权利要求 16所述的装置, 其特征在于, 所述 GSM系统处理单元至 少在所述 GSM帧中的两个空闲时隙接收 TD-SCDMA数据。
19、 如权利要求 18所述的装置, 其特征在于, 所述空闲时隙为 GSM帧中 连续的空闲时隙。
20、 如权利要求 19所述的装置, 其特征在于, 所述 GSM系统处理单元在 所述空闲时隙所对应的起始时间点从 GSM系统的射频频带切换到 TD-SCDMA 系统的射频频带上,并在所述空闲时隙所对应的结束时间点从 TD-SCDMA系统 的射频频带切换到 GSM系统的射频频带上。
21、 如权利要求 16至 20任一项所述的装置, 其特征在于, 所述 GSM系统 处理单元调用 TD-SCDMA的处理函数检测 TD-SCDMA信号中的 DwPTS。
PCT/CN2007/002110 2006-07-19 2007-07-10 Procédé et dispositif de synchronisation initiale entre un système gsm et un système td-scdma WO2008011798A1 (fr)

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