WO2007054005A1 - Méthode d’interaction de données, système et dispositif émetteur/récepteur de données - Google Patents

Méthode d’interaction de données, système et dispositif émetteur/récepteur de données Download PDF

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Publication number
WO2007054005A1
WO2007054005A1 PCT/CN2006/002578 CN2006002578W WO2007054005A1 WO 2007054005 A1 WO2007054005 A1 WO 2007054005A1 CN 2006002578 W CN2006002578 W CN 2006002578W WO 2007054005 A1 WO2007054005 A1 WO 2007054005A1
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WO
WIPO (PCT)
Prior art keywords
data
frame
unit
delimiter
subunit
Prior art date
Application number
PCT/CN2006/002578
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English (en)
Chinese (zh)
Inventor
Xuyong Wu
Zhong Pan
Quanbo Zhao
Original Assignee
Huawei Technologies 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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007054005A1 publication Critical patent/WO2007054005A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Definitions

  • the present invention relates to communication technologies, and in particular, to a data interaction method, system, and data transceiver device. Background technique
  • BS Base Station
  • SS Subscriber Station 1_1
  • BS2 can also cover the location of the terminal.
  • BS1 and BS2 use the same frequency, SSI-1 will be interfered by BS2.
  • BS1 and BS2 can only use the same frequency point, in order to avoid interference at the terminal, the devices of the system can be synchronized, that is, the receiving and transmitting of BS1 and BS2 are performed simultaneously, and in the common coverage area.
  • BS1 and BS2 work in a time-sharing manner, that is, when BS1 sends data to SSI-1, BS2 needs to stop transmitting data to the location.
  • SS1-1 has data to be sent to BS1
  • the terminal belonging to BS2 at the location needs to stop transmitting data.
  • SSI-1 can determine the starting position of the data transmitted by BS1.
  • SSI-1 must correctly sample the data sent by BS1, and must also know the delay parameter. This parameter can be actually measured by ranging.
  • BS2 also needs to communicate with SSI-1.
  • BS2 broadcasts its own IP address to a neighboring terminal through a dedicated time slot of CTS (Coexistence Time Slot).
  • CTS Common Time Slot
  • each data frame has a frame header SOF (Start Of Frame) and an EOF (End Of Frame) tag.
  • the middle is a PLD carrying an IP address. (payload, payload) domain.
  • the data frame is then split into frame fragments, where SOF and EOF respectively occupy one frame fragment, and the frame fragments are transmitted piece by piece in a dedicated CTS slot allocated to the IP address broadcast message.
  • the frame fragment receiving device detects the SOF flag at the start position of the CTS slot, and after detecting, each subsequent CTS is regarded as the content of the data frame until the EOF flag is received, and reception of one data frame is completed.
  • the uplink (UL, Up Link) data transmission time slot and the downlink (DL, Down link) data transmission time slot are included between the two CTS dedicated time slots.
  • SS1_1 does not belong to BS2, and even the physical layer technologies used by the two are different, the ranging between BS2 and SS1_1 may not be possible, and thus accurate delay parameters cannot be obtained.
  • the communication between heterogeneous devices adopts the energy signal mode.
  • the initial flag signal can be guaranteed by increasing the symbol period to a certain width. Can be judged correctly.
  • the symbol period increases, which directly leads to a decrease in the number of symbols that can be transmitted in the CTS period and a low bandwidth utilization.
  • the invention provides a data interaction method, a system and a data transceiving device, so as to solve the problem that the number of symbols that can be transmitted in a dedicated slot cycle is reduced and the bandwidth utilization rate is low when the existing symbol period guarantee signal is correctly determined. .
  • a data interaction method includes the following steps:
  • the transmitting end sends frame fragments piece by piece, and the frame fragments include valid data segments and bits in the data frame. a start delimiter and an end delimiter at both ends of the data segment;
  • the receiving end receives the valid data segments located in each of the frame fragments one by one according to the start delimiter and the end delimiter.
  • the data frame includes at least one frame fragment, and all frame fragments of the data frame are transmitted in a fixed time slot in each slot cycle.
  • the head and the tail of the fixed time slot are respectively provided with free portions that cannot be used.
  • the receiving process of the valid data segment located in each of the frame fragments is: the receiving end starts detecting the start of the frame fragment after the start time of each fixed time slot starts or after the set delay time starts.
  • the delimiter and starts receiving the valid data segment when the start delimiter is detected, synchronously detects the end delimiter of the frame fragment during reception, and stops receiving when the end delimiter is detected.
  • the first and second half of the start delimiter or the end delimiter have different emission energies, and the receiving end uses a sliding window to detect.
  • the data frame is an IP address broadcast message frame
  • the fixed time slot is a coexistence dedicated time slice CTS of an IP address broadcast message frame.
  • the present invention further provides a data interaction system, including a transmitting end and a receiving end, where: the transmitting end includes: a sending unit, a data frame segmentation intercepting unit, and a delimiter adding unit, and the data frame segmentation intercepting and loading unit Intercepting the data segment of the data frame to be sent and sending it to the delimiter adding unit, the delimiter adding unit adding a delimiter at both ends of the data segment and assembling the frame into pieces to be sent by the sending unit;
  • the receiving end includes: a receiving unit, a data frame segment assembling unit, and a delimiter removing unit, where the delimiter removing unit removes delimiters at both ends of the frame fragment received by the receiving unit, and reports the data segment to the data segment.
  • a frame segment assembling unit wherein the data frame segment assembling unit reassembles the data segment.
  • the sending end further includes: a data frame storage unit to be sent, and the data frame segment intercepting unit is connected to store the data frame to be sent;
  • the receiving end further includes: a receiving data frame storage unit, and connecting the data frame segment assembling unit, configured to store the reassembled data segment.
  • the sending unit includes: a first time slot monitoring subunit, and a first pulse triggering sub Metadata, data transmission subunit;
  • the first time slot monitoring subunit monitors whether a start time of the transmission frame fragmentation time slot or a set time delay after the start, and whether the time slot ends or the set time slot period is about to end, and at the start time Or sending the pulse trigger signal to the data transmitting subunit by the first pulse triggering subunit when the set delay arrives, and the data transmitting subunit sends the delimiter according to the pulse trigger signal Add a frame fragment of the unit assembly;
  • the receiving unit includes: a second time slot monitoring subunit, a second pulse triggering subunit, a data sampling subunit, and a data identifying subunit;
  • the second pulse triggering subunit triggers the data sampling subunit according to a trigger signal output by the time slot monitoring subunit to generate a required periodic sampling pulse, and the data sampling subunit periodically samples the received data and
  • the sampled data is synchronized with the input data identification subunit, and the data identification subunit detects the start delimiter and the end delimiter of the frame fragment according to the energy of the sampled signal, identifies valid data between the delimiters, and reports the recognition result to the data.
  • Delimiter removes the unit.
  • the invention also provides a data transceiving device, comprising a transceiving unit, further comprising a data frame segmentation/assembly unit and a delimiter addition/removal unit:
  • the data frame segmentation intercepting/assembly unit intercepts the data segment of the data frame to be transmitted and sends it to a delimiter add/remove unit, the delimiter add/remove unit adds a delimiter at both ends of the data segment and After being assembled into frame fragments, they are sent to the transceiver unit for transmission; or
  • the delimiter adding/removing unit removes the delimiter at both ends of the frame fragment received by the transceiving unit, and then segments the data into a data segment segmentation/assembly unit, and the data frame segmentation intercept/group
  • the loading unit reorganizes the data segment.
  • the data transceiver device further includes: a data frame storage unit, and a connection data frame segmentation/assembly unit for storing the data frame.
  • the data frame storage unit includes: a data frame storage subunit to be transmitted and a received data frame storage subunit.
  • the transceiver unit includes: a time slot monitoring subunit, a pulse triggering subunit, a data sampling subunit, a data identifying subunit, and a data transmitting subunit;
  • the time slot monitoring sub-unit monitors whether the start time of the transmission frame fragmentation time slot or the set time delay after the start, and whether the time slot ends or the set time slot period is about to end, and starts or starts at the start time After the set delay arrives, the corresponding trigger signal is output to the data sampling subunit, and the trigger signal is turned off when the time slot is about to end; the data transmitting subunit sends the frame assembled by the delimiter adding unit according to the pulse trigger signal. Fragmentation;
  • the pulse triggering subunit generates the required periodic sampling pulse according to the trigger signal output by the time slot monitoring subunit, and the data sampling subunit periodically samples the received data and samples the data. Synchronizing the input data identification subunit, the data identification subunit detects the start delimiter and the end delimiter of the frame fragment according to the energy of the sampled signal, identifies the valid data between the delimiters, and reports the recognition result to the delimitation Remove the unit.
  • asynchronous mode is adopted instead of the coexistence device of unknown parameters, and the asynchronous communication mode is adopted.
  • Only the middle part is a valid segment in each time slot, and the start and end delimiters are provided at both ends of the frame fragment transmitted in the valid segment.
  • the receiving device detects the start delimiter and starts receiving data until the end delimiter is received, so that it is not necessary to compensate for the received data decision error caused by the unsynchronized reception time by increasing the width of the single symbol of the dedicated time slot. The system bandwidth occupied by dedicated time slots is reduced.
  • FIG. 1 is a schematic diagram of a common coverage point of two adjacent base stations
  • FIG. 2 is a schematic diagram of a frame format of a data frame and a data frame divided into frame fragments
  • FIG. 3 is a schematic diagram of BS2 transmitting a frame fragment through a CTS dedicated time slot
  • FIG. 4 is a schematic diagram of a partial transmission frame fragment in a CTS dedicated time slot according to the method of the present invention
  • FIG. 5 is a schematic diagram of a structure and a division manner of a frame fragment according to the method of the present invention.
  • Figure 6 is an example of asynchronous detection of the SOC flag
  • 7 is a processing flow of a method at a data sending end according to the method of the present invention
  • 8 is a processing flow of a method at a data receiving end according to the method of the present invention
  • FIG. 9 is a schematic structural diagram of a data transceiver device according to the present invention.
  • FIG. 10 is a schematic diagram of main structures of a data interaction system according to the present invention.
  • Figure 11 is an example of an energy symbol
  • Figure 12 shows an example of energy symbol transmission.
  • the transmission and reception of the broadcast message of the IP address are still taken as an example.
  • a gap is reserved for both the start (Start) and the end (End), which ensures that a gap is not used.
  • FIG. 5 a schematic diagram of the structure of slice division manner and the frame invention according to the length of the active interval t Valid division frame fragmentation, plus start slot beginning of each frame in the previous slice
  • the delimiter that is, the start flag SOC (Start OfCTS)
  • the end delimiter of the end of the slot that is, the tail flag EOC (End Of CTS).
  • the receiving device identifies the first slice of the data frame by the SOC flag of the time slot, and identifies the last slice of the data frame according to the tail flag EOC, so that a valid data segment can be identified.
  • the head and tail flags of the time slot can be the same as the start and end flags of the data frame without hindering the judgment of the receiving device.
  • the padding field PAD (Padding, padding field) can be set to keep the length of each slice consistent.
  • the padding field is not required.
  • the end flag of the frame and the tail flag of the CTS slot can be advanced.
  • the receiver stops receiving. Even if the PAD is added, it is carried in the frame header of each frame.
  • the frame data length information the receiving end may determine the tail of the valid data and the check code check according to the frame data length information, thereby completely receiving and verifying the valid data.
  • the receiving device does not need to synchronously detect and transmit the frame fragment carrying the SOF flag in the CTS slot.
  • the sliding window is used to detect the SOC flag of the CTS, and the asynchronous detection can be started after a period of time after the start of the CTS time slot, and the delayed time is selected as the shortest delay parameter according to the empirical value, thereby effectively reducing the probability of sampling invalid data. .
  • the sliding window method uses a fixed-length window that moves within the effective period, moving a certain number of samples each time, such as a sampling point. The energy of each part of the data falling into the window is judged, and the set threshold interval to which the data energy of each part belongs is determined, thereby identifying the signal.
  • Fig. 6 it is an example of a single block for asynchronously detecting the SOC flag.
  • the SOC is a single signal with the first half cycle being low and the second half cycle being high. It is only necessary to set a threshold for its judgment. In the figure, after the sliding window moves to the fifth position, the signal energy in the first half of the window is lower than the threshold, and the signal energy in the second half exceeds the threshold. Therefore, the position of the window at this time is considered to be the position of the SOC.
  • the subsequent data is the valid data in the data frame until the EOC flag is detected, and the reception of a data frame is ended.
  • the SOC and the EOC flag are added to the frame fragments sent in each CTS slot, and the asynchronous detection mode is adopted at the receiving end, which can effectively eliminate the negative influence of the reception error caused by the ranging.
  • the length of the CTS slot only needs to be added with the maximum advance time and the maximum delay time protection in the effective CTS data length, without increasing the width of the single symbol of the CTS to compensate for the received data decision error caused by the asynchronous reception time. Reduce the system bandwidth occupied by the CTS.
  • the above description takes the transmission and reception of the IP address broadcast message as an example. Since the method of the present invention does not need to complete the reception and transmission of the data in synchronization, the delay test is not necessary between the data receiving device and the data transmitting device, and thus the present invention The method can be applied to data interaction between any of the same or different communication devices.
  • the data processing flow of the sender is as shown in FIG. 7, and includes the following steps:
  • the frame fragment is set at or after the start time of the dedicated transmission slot of the data frame. Sent at a fixed time.
  • the processing flow of the receiving end is as shown in Figure 8, and includes the following steps:
  • step S201 determining whether the time to start sampling the dedicated time slot arrives, if yes, proceeding to step S202, otherwise looping to step S201;
  • the time to start sampling is the start time of the time slot or the set time delay after the start.
  • the set delay is generally taken as the minimum delay based on the empirical value.
  • step S203 periodically determining whether the start delimiter of the frame fragment is received, if yes, proceeding to step S203, otherwise looping to step S202;
  • step S203 receiving the data segment and synchronously determining whether the end delimiter of the frame fragment is received, if yes, ending receiving the frame fragment and continuing to step S204, otherwise looping to step S203;
  • step S204 Determine whether the next time slot starts. If yes, return to step S201, otherwise loop step S204.
  • the present invention further provides a data transceiving device 300 for a communication device, as shown in FIG. 9, including a data frame storage unit 301, a data frame segmentation/assembly unit 302, and a demarcation Add/remove unit 303, transceiver unit 304, where:
  • a data frame storage unit 301 a data frame storage unit 301, a connection data frame segmentation/assembly unit 302, configured to store data frames;
  • a data frame segmentation/assembly unit 302 configured to intercept a data segment of the data frame to be transmitted and send it to the delimiter addition/removal unit 303, or assemble a data segment reported by the delimiter addition/removal unit;
  • the delimiter adding/removing unit 303 is configured to add a delimiter at both ends of the data segment and assemble it into a frame fragment and then send it to the transceiver unit 304, or remove the delimiter at both ends of the frame fragment reported by the transceiver unit 304.
  • Data segmentation is reported to the data frame segmentation intercept/assembly unit;
  • transceiver unit 304 configured to send/receive frame fragments
  • the data frame storage unit 301 includes the following subunits: a data frame storage subunit to be transmitted. 3011 and receive data frame storage subunit 3012.
  • the transceiver unit 304 includes the following subunits: a pulse trigger subunit 3041, a data sampling subunit 3042, a delimiter identification subunit 3043, a data transmission subunit 3044, and a time slot monitoring subunit 3045.
  • the time slot monitoring unit 3045 is connected to the pulse triggering subunit 3041 for detecting whether a certain time delay is reached after the start time or the start of each time slot, and starting the pulse triggering subunit 3041 to start working.
  • the pulse triggering subunit 3041 is turned off at the end of the time slot or at the end.
  • the pulse triggering subunit 3041 When the data is transmitted, the pulse triggering subunit 3041 generates a transmission pulse according to the trigger signal start period output by the time slot monitoring unit 3045, and the data frame segmentation/assembly unit 302 intercepts the data to be transmitted from the to-be-sent data frame storage subunit 3011.
  • the data segment is transmitted by the delimiter addition/removal unit 303 after adding the delimiter and assembling into a frame fragment, and is transmitted by the data transmission subunit 3044 at the timing of the transmission pulse outputted by the pulse trigger subunit 3041.
  • the time slot monitoring subunit 3045 detects a certain time delay at the beginning or after the start of each time slot according to the local time, and sends a trigger signal to the pulse triggering subunit 3041, and the pulse triggering subunit 3041 generates a periodic sampling according to the trigger signal.
  • the clock is output to the data sampling subunit.
  • the data sampling subunit 3042 samples the received data at the sampling pulse time, and synchronously inputs the sampling data to the data identification subunit 3043.
  • the data identification subunit 3043 detects the energy of the sampling signal by using a sliding window method.
  • delimiter addition/removal The unit 303 removes the delimiter and reports it to the data frame segmentation/assembly unit 302. The data is successfully assembled and stored in the received data frame storage sub-unit 3012.
  • the present invention further provides a data interaction system, including a transmitting end 401 and a receiving end 402, where:
  • the sending end 401 includes: a sending unit 4011, a data frame segmentation intercepting unit 4012, and a delimiter adding unit 4013.
  • the data frame segment intercepting and loading unit 4012 intercepts the data segment of the data frame to be transmitted and sends the data segment to the delimitation.
  • Adding unit 4013, the delimiter adding unit 4013 adds a delimiter at both ends of the data segment and assembles it into a frame fragment and transmits it through the transmitting unit 4011;
  • the sending end 401 further comprising: data to be transmitted the frame memory unit 4014, connected to said data frame segments interception unit 4012 for storing the data frame to be transmitted;
  • the sending unit 4011 includes: a first time slot monitoring subunit 40111, a first pulse triggering subunit 40112, and a data sending subunit 40113;
  • the first time slot monitoring subunit 40111 monitors whether the start time of the transmission frame fragmentation time slot or the set time delay after the start, and whether the time slot ends or the set time slot period is about to end, and at the beginning When the time delay or the start delay is reached, the corresponding pulse trigger signal is output to the data transmitting subunit 40113 through the first pulse triggering subunit 40112, and the trigger signal is turned off when the time slot is about to end; the data transmitting subunit 40113 Sending a frame fragment according to the pulse trigger signal; the receiving end includes 402: a receiving unit 4021, a delimiter removing unit 4022, and a data frame segment assembling unit 4023, and the delimiter removing unit 4022 removes receiving by the receiving unit 4021.
  • the delimiter at both ends of the frame fragment reports the data segment to the data frame segment assembling unit 4023, and the data frame segment assembling unit 4023 reassembles the data segment.
  • the receiving end further includes: a receiving data frame storage unit 4024, and the data frame segment assembling unit 4023 is connected to store the reassembled data segment.
  • the receiving unit 4021 includes: a second time slot monitoring subunit 40211, a second pulse triggering subunit 40212, a data sampling subunit 40213, and a data identifying subunit 40214;
  • the second pulse triggering sub-unit 40212 triggers the data sampling sub-unit 40213 according to the trigger signal output by the time slot monitoring sub-unit 40211 to generate a periodic sampling pulse, and the data sampling sub-unit 40213 periodically samples and receives the data. And synchronizing the sampled data into the data identification sub-unit 40214, the data identification sub-unit 40214 detecting the start delimiter of the frame fragment and the end delimiter according to the energy of the sampled signal, and identifying valid data between the delimiters, The recognition result is reported to the delimiter removal unit.
  • the following is an example of a specific implementation of the start flag SOC or the end flag EOC.
  • two types of transmit energy values can be defined, such as high H/low L, corresponding to 0 and 1, respectively, for transmitting different
  • the flag bit symbol for example, the high energy symbol indicates 1 and the low energy symbol indicates 0, (H - l, L - 0), and in one symbol period, if the first half is low energy and the second half is high energy
  • the symbol is the start flag SOC, and the opposite is the end flag EOC.
  • the figure below is the energy pulse mode at this time.
  • define several different energy levels for example, divided into four energy levels, corresponding to the code 00/01/10/11, (such as 0-00, 1-01, 2-10, 3-11). This can carry more information per unit time, but the receiver needs multiple thresholds for decision making.
  • the energy symbol must last for a certain period of time. For high-speed sampling frequencies, multiple sample points are required to represent an energy symbol. Taking the two energy value symbols of Fig. 11 as an example, one energy symbol period represents only one bit information. Assuming a sampling frequency of 10 MHz, if the symbol time lasts 10 ⁇ s to be reliable, then each bit needs 100 samples to represent. For example, as shown in Figure 12, a frame fragment with the content "SOC, 0, 1, EOC" needs to be transmitted. The signal that the sender needs to send is: 50 consecutive 0s, 50 consecutive 1s, consecutive 100 0s, consecutive 150 ones, and finally 50 consecutive zeros.
  • the spirit and scope of the invention Thus, it is intended that the present invention cover the modifications and variations of the inventions

Abstract

Méthode d’interaction de données, système et dispositif émetteur/récepteur de données résolvant le problème actuel selon lequel le nombre de symboles pouvant être fournis au CTS est réduit et le taux d’utilisation de la bande passante est bas, ce qui découle de ce qu’on assure que le signal est décidé correctement en élargissant le cycle de symbole. La méthode d’interaction de données consiste en ce que : l’extrémité émettrice émet des morceaux de trame morceau après morceau, le morceau de trame comporte un segment de données valide de la trame de données et un délimiteur de début et un délimiteur de fin aux deux extrémités du segment de données ; et l’extrémité réceptrice détermine la longueur du morceau de trame en fonction du délimiteur de début et du délimiteur de fin et reçoit le segment de données valide entre les deux délimiteurs. Le dispositif émetteur/récepteur de données comprend un élément d’interception/assemblage de segment de trame de données, un élément d’ajout/effacement de délimiteur et un élément émetteur/récepteur. La méthode selon la présente invention n’a pas besoin de compenser l’erreur de décision de données de réception causée par un asynchronisme d’instant de réception du fait de l’élargissement de la largeur d’un unique symbole dans CTS et diminue la bande passante système occupée par CTS.
PCT/CN2006/002578 2005-11-11 2006-09-29 Méthode d’interaction de données, système et dispositif émetteur/récepteur de données WO2007054005A1 (fr)

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CN2005101159213A CN1964227B (zh) 2005-11-11 2005-11-11 一种数据交互方法及数据收发模块
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JP4656095B2 (ja) * 2007-06-20 2011-03-23 日本電気株式会社 基地局制御装置及び基地局制御方法
CN101753527B (zh) * 2008-12-22 2012-10-17 华为技术有限公司 传送网中传送带宽分配信息的方法、系统及设备
CN101841513B (zh) * 2009-03-20 2013-03-27 高通创锐讯企业管理(上海)有限公司 Eoc网络中物理层帧的封装与解封装方法
CN105227287B (zh) * 2014-06-17 2018-12-25 华为技术有限公司 数据传输同步方法及装置
CN110073329B (zh) * 2016-12-16 2021-06-22 华为技术有限公司 访存设备、计算设备和应用于卷积神经网络运算的设备
CN110996269B (zh) * 2019-12-24 2021-07-20 湖北凯乐科技股份有限公司 一种基于令牌环的无线自组网QoS增强应用方法

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