WO2010121411A1 - Procédé et appareil de transmission de données - Google Patents

Procédé et appareil de transmission de données Download PDF

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Publication number
WO2010121411A1
WO2010121411A1 PCT/CN2009/071369 CN2009071369W WO2010121411A1 WO 2010121411 A1 WO2010121411 A1 WO 2010121411A1 CN 2009071369 W CN2009071369 W CN 2009071369W WO 2010121411 A1 WO2010121411 A1 WO 2010121411A1
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WO
WIPO (PCT)
Prior art keywords
data
relay device
subframe
base station
enb
Prior art date
Application number
PCT/CN2009/071369
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English (en)
Chinese (zh)
Inventor
陈小锋
白伟
Original Assignee
华为技术有限公司
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN200980122535.3A priority Critical patent/CN102301805B/zh
Priority to PCT/CN2009/071369 priority patent/WO2010121411A1/fr
Publication of WO2010121411A1 publication Critical patent/WO2010121411A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0079—Formats for control data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to communication technologies, and in particular, to a data transmission method and apparatus. Background technique
  • a relaying technology is introduced in the standard of the Long Term Evolution (LTE Advanced) standard.
  • LTE Advanced Long Term Evolution
  • FIG. 15 a schematic diagram of a wireless cellular system in which a relay technology is introduced in the prior art is shown.
  • the data sent by the base station (eNB) 1 is sent by the relay device 2 to the user equipment (User Equipment, UE for short) served by the relay device 2, and the UE (R-UE) 3 served by the relay device sends the data.
  • the data also needs to be sent to the eNB1 via the relay device 2.
  • each R-UE3 is served by the relay device 2
  • each UE4 is directly served by the eNB.
  • the relay backhaul link refers to the radio link between eNB1 and relay device 2 and the relay access link (refer to relay device 2 and R-UE3)
  • the relay device 2 since the relay device 2 continuously receives data from the eNB1 and continuously transmits data to the R-UE3, the relay device receives the data from the eNB1 while receiving the data from the eNB1. It is possible to receive the data sent by itself, which may interfere with the reception of data sent by the eNB1, that is, bring about self-backhaul interference, thereby affecting the smooth transmission of data in the wireless cellular system.
  • the eNB1 also has a similar loopback self-interference problem.
  • the eNB1 continuously receives data from the relay device 2 and continuously transmits data to the relay device 2 or the UE4, so that the eNB1 may receive the data from the relay device 2 while receiving the data.
  • the data transmitted by itself interferes with the reception of the data transmitted by the relay device 2.
  • the data subframe of the relay device or the eNB is set in the prior art.
  • the MBSFN subframe so that the relay device can have time to switch from the state of transmitting data to the R-UE to the state of receiving data transmitted by the eNB, and the eNB can have time to switch from the state of transmitting data to the UE to the transmission of the receiving relay device.
  • the status of the data is the status of the data.
  • the control data sent to the relay device is in the same resource block (RB) of the same resource block (RB), and the eNB cannot know that the relay device can decode (demodulate, decode, etc.) the data subframe. If the start position of the service data in the data sub-frame transmitted by the eNB is earlier than the start position of the service data in the data sub-frame of the eNB, the relay device may not be able to parse.
  • the embodiments of the present invention provide a data transmission method and apparatus for solving the problems in the prior art, which can solve the problem that the relay device and the eNB cannot know each other's starting symbol positions of the service data in the data subframes transmitted from each other. Part of the business data can not be parsed or the data transmission efficiency is not high.
  • the embodiment of the invention provides a data transmission method, including:
  • the location of the start symbol is based on control data in a data subframe of the first device Determining the number of occupied symbols and the number of control data occupation symbols in the data sub-frame of the second device;
  • the first device sets the service data at a location of the start symbol and transmits the service data to the second device.
  • the embodiment of the invention further provides a data transmission method, including:
  • the second device receives the service data sent by the first device
  • the second device parses the service data sent by the first device from the location of the start symbol.
  • the embodiment of the invention further provides a data transmission device, including:
  • a first determining module configured to determine a location of a start symbol of the service data sent to the second device in a data subframe of the data transmission device; where the start symbol is located according to the data of the data transmission device Determining, in the frame, the number of control data occupation symbols and the number of control data occupation symbols in the data subframe of the second device;
  • a first sending module configured to set the service data at a location of the start symbol, and send the service data to the second device.
  • the embodiment of the invention further provides a data transmission device, including:
  • a second receiving module configured to receive service data sent by the first device
  • a second determining module configured to determine a location of a start symbol of the service data sent by the first device in a data subframe of the first device
  • a first parsing module configured to determine a position of the starting symbol from the second determining module
  • the service data received by the second receiving module is analyzed.
  • the first device may determine, according to the number of control data occupation symbols in the data sub-frame of the data device and the number of control data occupation symbols in the data subframe of the second device, the start of the service data sent to the second device.
  • the location of the symbol, the second device may also determine the location of the start symbol of the service data sent by the first device, so that the service data in the data subframe transmitted by the first device and the second device cannot be known to each other.
  • the part of the service data caused by the start of the symbol position cannot be parsed or the data transmission efficiency is not high.
  • the first device may be an eNB
  • the second device may be a relay device; or the first device may be a relay device.
  • the second device can be an eNB.
  • Embodiment 1 is a flowchart of Embodiment 1 of a data transmission method according to the present invention
  • Embodiment 2 is a flowchart of Embodiment 2 of a data transmission method according to the present invention
  • Embodiment 3 is a flowchart of Embodiment 3 of a data transmission method according to the present invention.
  • Embodiment 4 is a flowchart of Embodiment 4 of a data transmission method according to the present invention.
  • FIG. 5 is a schematic structural diagram of a data subframe of a relay device and an eNB according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram showing the location of the first notification information involved in the normal downlink data subframe of the eNB side according to the embodiment of the present invention.
  • FIG. 7 is a schematic diagram showing another structure of a data subframe of a relay device and an eNB according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of Embodiment 5 of a data transmission method according to the present invention.
  • FIG. 9 is a flowchart of Embodiment 6 of a data transmission method according to the present invention.
  • FIG. 10 is a schematic diagram showing still another structure of a data subframe of a relay device and an eNB according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of Embodiment 1 of a data transmission apparatus according to the present invention.
  • Embodiment 12 is a schematic structural diagram of Embodiment 2 of a data transmission apparatus according to the present invention.
  • FIG. 13 is a schematic structural diagram of Embodiment 3 of a data transmission apparatus according to the present invention.
  • FIG. 14 is a schematic structural diagram of Embodiment 4 of a data transmission apparatus according to the present invention.
  • FIG. 15 is a schematic structural diagram of a wireless cellular system in which a relay technology is introduced in the prior art. detailed description
  • FIG. 1 is a flowchart of Embodiment 1 of a data transmission method according to the present invention, including:
  • Step 1 01 The first device determines the number of service data sent to the second device in the first device. According to the position of the start symbol in the subframe; the position of the start symbol is determined according to the number of control data occupation symbols in the data subframe of the first device and the number of control data occupation symbols in the data subframe of the second device.
  • Step 1 02 The first device sets the service data at the location of the start symbol, and sends the service data to the second device.
  • FIG. 2 is a flowchart of Embodiment 2 of a data transmission method according to the present invention, including:
  • Step 201 The second device receives the service data sent by the first device.
  • Step 202 The second device determines a location of the start symbol of the service data sent by the first device in the data subframe of the first device.
  • Step 203 The second device parses the service data sent by the first device from the location of the start symbol.
  • the first device may be an eNB, and the second device may be a relay device; or the first device may be a relay device, and the second device may be an eNB.
  • the first device is an eNB
  • the second device is a relay device
  • the eNB may further send the first notification information to the relay device, where the first notification information is used to indicate the service data sent by the eNB to the relay device.
  • the relay device can determine the location of the service data sent by the eNB. In this way, it is possible to solve the problem that part of the service data cannot be parsed or the data transmission efficiency is not high because the eNB and the relay device cannot mutually know the position of the start symbol of the service data in the data subframe transmitted from each other.
  • the eNB may not send the first notification information.
  • the relay device may control the data according to the number of symbols occupied by the control data and the data subframe of the relay device according to the data subframe of the eNB.
  • the number of occupied symbols is used to determine the location of the start symbol of the service data transmitted by the eNB, the location of the start symbol of the service data sent by the relay device determined by the relay device, and the service data sent by the eNB to the relay device.
  • the positions of the start symbols in the data subframe of the eNB are consistent, and the part caused by the location where the eNB and the relay device cannot know each other the location of the start symbol of the service data in the data subframe transmitted from each other can also be solved.
  • Business data cannot be parsed or the data transmission efficiency is not high.
  • the following describes the implementation of the present invention by transmitting service data from the eNB to the relay device and the relay device to transmit the service data to the eNB.
  • the eNB sends service data to the relay device
  • FIG. 3 is a flowchart of Embodiment 3 of a data transmission method according to the present invention, including:
  • Step 301 The eNB sets a value of the first parameter according to a length of a cyclic prefix (CPc) used in the data sub-frame and a first control data occupation number of the relay device, where the first Multicast multicast single frequency network with control data occupying the number of symbols as a relay device ( Mu lt i-media Broadcas t over a S ing le Frequency Network , abbreviated as MBSFN ) The number of control data occupation symbols in the data sub-frame.
  • CPc cyclic prefix
  • MBSFN Mu lt i-media Broadcas t over a S ing le Frequency Network
  • Step 302 The eNB determines, according to the first control data occupation number of symbols, the number of second control data occupation symbols, and the set value of the first parameter, that the service data sent to the relay device is in the data subframe of the eNB.
  • the position of the start symbol, where the number of symbols occupied by the second control data is the number of control data occupation symbols in the data subframe of the eNB.
  • Step 303 The eNB sets the service data at the determined start symbol position, and sends the service data to the relay device.
  • the method may further include: when the relay device initially accesses the eNB, the eNB receives the first control data occupation symbol number sent by the relay device.
  • the step of the relay device transmitting the first control data occupying the number of symbols to the eNB may be performed when the relay device initially accesses the eNB.
  • the relay device does not need to send the first control data occupying the number of symbols to the eNB every time. If the number of symbols of the first control data occupation of the relay device changes during the subsequent data transmission, the relay device needs to transmit a new first control data occupying the number of symbols to the eNB.
  • the eNB may further send the first notification information to the relay device, where the first notification information is used to indicate the start symbol of the service data sent by the eNB to the relay device in the data subframe of the eNB. position.
  • FIG. 4 is a flowchart of Embodiment 4 of a data transmission method according to the present invention, including:
  • Step 401 The relay device receives the service data sent by the eNB, where the data subframe of the relay device is an MBSFN data subframe.
  • Step 402 The relay device determines a location of the start symbol of the service data sent by the eNB in the data subframe of the eNB.
  • Step 403 The relay device parses the service data sent by the eNB from the determined location of the start symbol.
  • the eNB does not send the first notification information to the relay device
  • the fourth embodiment further includes the number of symbols occupied by the relay device according to the first control data of the UE and the length of the CP used in the data subframe of the eNB. Set the value of the first parameter.
  • the relay device determines that the location of the start symbol in the data subframe of the eNB of the service data sent by the eNB is specifically: the number of symbols occupied by the relay device according to the first control data of the eNB, and the second control data of the eNB.
  • the number of occupied symbols and the value of the set first parameter determine the location of the start symbol in the data subframe of the eNB for the service data transmitted by the eNB.
  • the relay device may acquire the second control data occupation number of the eNB and the length of the CP used in the data subframe of the eNB, where the second control data occupies the symbol.
  • the number information is a symbol used by the control data in the data sub-frame of the eNB.
  • the eNB sends the first notification information to the relay device, where the step 4 02 in the third embodiment is specifically that the relay device receives the first notification information sent by the eNB, parses the first notification information, and determines the eNB according to the eNB.
  • the location of the transmitted symbol is the starting symbol in the data sub-frame of the eNB.
  • the data subframe of the relay device may be configured as an MBSFN subframe, and at the corresponding position, the data subframe of the eNB is configured as a normal data sub-frame.
  • a frame ie, a non-MBSFN subframe
  • a data subframe of an eNB is also configured as an MBSFN subframe.
  • the data subframe of the relay device is configured as an MBSFN subframe
  • the data subframe of the eNB is configured as a normal subframe
  • FIG. 5 is a schematic structural diagram of a data subframe of a relay device and an eNB involved in an embodiment of the present invention.
  • the relay device transmits the first control data to the R-UE within a time occupied by the first control data of the relay apparatus MBSFN data subframe, after a guard interval (Guard Per i od) After the time of GP), the relay device in turn receives the service data transmitted by the eNB. After receiving the service data sent by the eNB, after a GP time, the MBSFN data subframe ends.
  • a guard interval Guard Per i od
  • the relay device can complete the transmission from the first
  • the state of the control data to the UE is switched to the state of the service data transmitted by the receiving eNB, and the state of the service data transmitted from the receiving eNB is switched to the state in which the first control symbol is transmitted to the R-UE.
  • the conversion time between the receive and transmit states that is, the above GP, requires approximately at least 20 microseconds ( ⁇ ⁇ ).
  • the length of the GP can be different depending on the actual situation of the wireless data frame.
  • the GP added between the first control data and the service data received from the eNB, and the GP added at the end of the MBSFN data subframe may be different in length.
  • the eNB in the data subframe of the eNB, during the time occupied by the second control data, the eNB sends the second control data to the UE, and after the eNB sends the second control data, the eNB sends the data to the relay device, and/ Or send data to the UE.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the normal CP length is about 4.7 microseconds
  • the extended CP length is about 16.7 microseconds.
  • the cell served by the eNB or the cell served by the relay device The length of the CP in the OFDM symbol is configured by the eNB or the relay device.
  • the selection of the normal CP or the extended CP is mainly determined by the radius of the cell.
  • the extended subframe is configured in the data subframe with a large cell radius, and the data subframe with the small cell radius is configured normally. Since the cell radius of the relay device is small, the CP configured in the data subframe of the relay device adopts a normal CP.
  • the data subframe of the eNB may adopt a normal CP or an extended CP.
  • the number of symbols occupied by the number of the second control data of the normal downlink data sub-frame (the symbol of the OFDM symbol in the embodiment of the present invention) and the physical hybrid automatic re-indication channel (PHICH) of the eNB related.
  • the state of the number of symbols occupied by the PHICH is divided into two types: a normal state or an extended state, and the state of the number of symbols occupied by the PHICH is carried in the system broadcast information sent by the eNB.
  • non-small bandwidth that is, if the resource in the frequency domain is less than or equal to 10 Physical Resource Blocks (PRBs)
  • PRBs Physical Resource Blocks
  • the PHICH occupies 3 symbols; for the MBSFN data subframe, the normal state indicates that the PHICH occupies 1 symbol, and the extended state indicates that the PHICH occupies 2 symbols.
  • the number of symbols occupied by the PHICH of the eNB is 1, the number of symbols occupied by the second control data of the normal downlink data subframe is 1 or 2 or 3, and the second control data of each downlink data subframe occupies the symbol.
  • the number is determined by the current scheduling algorithm and is indicated by a Physical Control Format Indicator Channel (PCFICH).
  • PCFICH Physical Control Format Indicator Channel
  • the control data occupies the first one or two symbols, and the number of symbols occupied by the control data is also related to the state in which the PHCIH occupies the number of symbols.
  • the number of PHICH occupied symbols is normal, the number of symbols occupied by the control data of the MBSFN data subframe is 1 or 2, which is indicated by the PCFICH; when the number of PHICH occupied symbols is extended, the control data of the MBSFN data subframe The number of occupied symbols is two, indicated by the PCFICH.
  • the number of symbols occupied by the PHICH is normal and the MBSFN data subframe is used for the relay technology
  • the number of symbols occupied by the control data in the MBSFN data subframe is specifically 1 or 2 and needs to be configured by the upper layer.
  • the relay device In order for the eNB to determine which location of the normal downlink subframe needs to be added to the normal downlink subframe when transmitting the normal downlink data subframe, the relay device changes its own MBSFN data subframe in the initial access eNB or the relay device. When the first control data occupies the number of symbols, the number of the first control data occupation symbols in the MBSFN data subframe of the relay device needs to be sent to the eNB.
  • the relay device may explicitly indicate that the number of the first control data occupation symbols of the configured MBSFN data subframe is 1 or 2 by using 1-bit data; or The device may implicitly include the number of symbols occupied by the first control data in other information it transmits to the eNB.
  • the relay device may acquire the second control data occupation symbol number information of the eNB and the length of the CP used by the data subframe of the eNB.
  • the relay device can determine the value range of the number of symbols occupied by the second control data according to the state of the number of symbols occupied by the PHICH in the system broadcast information sent by the eNB.
  • step 302 the eNB determines that the location of the start symbol in the data subframe of the eNB for the service data transmitted to the relay device can be performed according to formula (1).
  • K is the starting symbol position of the service data transmitted to the relay device determined by the eNB in the data subframe of the eNB, that is, the eNB starts transmitting the service data from the Kth symbol to the relay device
  • K_GP represents the first parameter. It should be noted that the first parameter is a modified parameter used in the embodiment of the present invention, and is used to adopt a normal CP and an extended CP in the data subframe of the eNB according to formula (1). The correct location of the service data start symbol can be obtained.
  • the value of K_P is related to the length of the CP used by the data subframe of the eNB and the number of symbols occupied by the first control data of the relay device.
  • the relay device and the eNB correspond to the start position of all symbols in the data subframe.
  • the relay device can only receive from the middle of the m+1th symbol (after about 20 microseconds), but since the symbol must be completely received (at least the part except the CP needs to be completely received)
  • the data subframe of the eNB is an extended CP
  • the MBSFN data subframe of the relay device Usually, a normal CP is used, so one symbol of the eNB is about 11 microseconds longer than one symbol of the relay device, so the symbol in the data sub-frame of the relay device and the eNB only has the start position of the first symbol. aligned. If the first control data in the MBSFN data subframe of the relay device occupies 1 symbol, when the relay device transmits the first control data occupying one symbol, there is still about 11 microseconds before the start of the second symbol of the eNB.
  • the relay device may also determine, according to formula (1), the starting symbol position of the service data transmitted by the eNB in the data subframe of the eNB.
  • the first control data occupies the number of symbols
  • the second control data occupies the number of symbols
  • the eNB data sub-frames use different CP lengths, and the value of K is different.
  • the number of symbols occupied by the PHI CH in the normal downlink data subframe of the eNB is 3 and the data subframe of the eNB adopts a normal CP
  • the number of symbols occupied by the second control data of the eNB is 3, if the relay device
  • the eNB may determine that K is still 4. Thus, the eNB starts transmitting traffic data to all relay devices starting from the fourth symbol.
  • the relay device When the eNB first accesses the eNB, it learns that the number of symbols occupied by the PH ICH in the normal downlink data subframe of the eNB is 3, and learns that the data subframe of the eNB adopts a normal CP, so the relay device can determine the normal downlink.
  • the eNB determines the start symbol of the service data according to the first control data occupation number of symbols, the second control data occupation symbol number, and the CP length used by the data subframe of the eNB.
  • the location, and the relay device are consistent according to the first control data occupying the number of symbols, the second control data occupying the number of symbols, and the starting symbol of the parsing service data determined by the CP length of the data subframe of the eNB, This can prevent the eNB and the relay device from being unable to be received due to the inconsistent position of the determined service data start symbol, and can prevent the relay device from receiving unnecessary data, thereby improving data transmission. effectiveness.
  • the relay device When the eNB first accesses the eNB, it learns that the number of symbols occupied by the PHICH in the normal downlink data subframe of the eNB is 1, and learns that the data subframe of the eNB adopts a normal CP, so the relay device can determine the data subframe of the eNB.
  • the relay device parses the service data starting from the 4th symbol.
  • the eNB for the eNB, the number of symbols occupied by the second control data in the normal downlink data subframe can be determined, so the eNB can determine the specific value of K.
  • the symbol occupied by the second control data can only be determined according to the number of symbols occupied by the PHICH. The number ranges from 1 or 2 or 3, so the relay cannot determine if the value of K is 3 or 4. Therefore, the eNB starts transmitting service data to the relay device from the third or fourth symbols, and transmits the first notification information to the relay device, and notifies the relay device to analyze the service data from the third or fourth symbols.
  • the first notification information can occupy 1 bit.
  • the 1-bit first notification information can be transmitted to the relay device through a separate physical channel.
  • the physical channel is defined on the fourth symbol, or the eNB gives the last symbol of the control channel of the relay device, or defines one or a few symbols reserved for the time-frequency resource after the fourth symbol.
  • Control channel sent to the relay device and traffic channel sent to the relay device The frequency division mode may be adopted.
  • the first notification information related to the first notification information involved in the embodiment of the present invention is in a normal downlink data subframe of the eNB side, and the control channel is set symmetrically on both sides of the entire bandwidth in FIG. On the two PRBs, the control channel can also be set on one PRB symmetrically on both sides of the entire bandwidth.
  • the control channel is set on two PRBs symmetrically on both sides of the entire bandwidth; for example, indicating the start of service data.
  • the 1-bit first notification information of the symbol position is set on the PRB at the most edge position, when the eNB transmits the control channel in the data subframe of the relay device and the traffic channel frequency division sent by the eNB to the relay device.
  • the second notification information of the other bit may also be used to indicate that the control channel occupies one P RB of the entire bandwidth start position of the data subframe and one PRB of the end position, or the control channel occupies the data sub
  • the 2 PRBs of the entire bandwidth start position of the frame and the 2 PRBs of the end position the second notification information may be set on a separate physical channel together with the first notification information.
  • a code division manner may be adopted between the second control data sent by the eNB to different relay devices.
  • the first notification information may be added to the relay device in a certain control channel, for example, carried in the R-PDCCH of the eNB to the relay device, where the R-PDDCH refers to the base station sent to the relay device.
  • the Physical Downlink Control Channel (PDCCH) is similar to the PDCCH sent by the base station to the UE, and the control channel sent to the relay device always starts from the 4th symbol.
  • the relay device After receiving the first notification information, the relay device can determine that the eNB has sent the service data from the symbol, so that the service data can be parsed from the correct starting symbol position. However, in the case where the first control data occupies 1 symbol, since the service data transmitted by the eNB may start from the 3rd symbol, the relay is always known regardless of the start symbol position of the service data from the first notification information. Once the device transitions from the state of transmitting data to the R-UE to the state of receiving service data from the eNB, it needs to receive the service data transmitted by the eNB.
  • the eNB limits the number of symbols occupied by the second control data to 1 or 2, so that K can be determined to be 3, so that the relay device can also determine that K is 3.
  • the eNB for the eNB, the number of symbols occupied by the second control data in the normal downlink data subframe can be determined, so the eNB can determine the specific value of K.
  • the symbols occupied by the second control data can only be determined according to the number of symbols occupied by the PHICH.
  • the number range is 1 or 2 or 3, so the relay cannot determine whether the value of K is 3 or 4. Therefore, the eNB starts transmitting service data to the relay device from the third or fourth symbols, and transmits the first notification information to the relay device, and notifies the relay device to analyze the service data from the third or fourth symbols.
  • the specific value of ⁇ can be determined for the eNB.
  • the value of K can only be determined to be 2 or 3 or 4 according to the number of symbols occupied by the PHICH. Therefore, the eNB starts to send service data to the relay device from the determined second or third or fourth symbols, and sends the first notification information to the relay device, informing the relay device to start parsing the service from the second or third or fourth symbols. data.
  • the first notification message can occupy 2 bits. For example, when the first bit occupied by the first notification information is 1, the eNB indicates that the eNB starts to send the service data from the third symbol to the first control data in the A2 part, and the relay device that occupies 2 symbols is used as the first notification.
  • the eNB When the first bit occupied by the information is 0, the eNB indicates that the eNB starts to transmit the service data from the fourth symbol to the relay device in which the first control data in the A2 part occupies 2 symbols; when the first bit is 1, A relay device that controls data occupying 1 symbol, and then uses the second bit to distinguish whether the service data for it starts from the 2nd or 3rd symbol; when the first bit is 0, the first control data is occupied.
  • the relay device of one symbol also analyzes data starting from the fourth symbol.
  • the 2-bit first notification information can be transmitted to the relay device through a separate physical channel.
  • the physical channel is defined on the fourth symbol, or is defined on the last symbol of the control channel of the eNB to the relay device, or is defined on one or several symbol reserved time-frequency resources after the fourth symbol.
  • the control channel sent to the relay device and the traffic channel sent to the relay device may be in a frequency division manner, and the position of the first notification information in the downlink normal subframe may be as shown in FIG. 6.
  • the number of symbols occupied by the second control data in the normal downlink data subframe may be 1 or 2 or
  • the eNB starts transmitting service data to the relay device from the third or fourth symbols, and transmits the first notification information to the relay device, informing the relay device to start parsing the service data from the third or fourth symbols.
  • the first notification information can occupy 1 bit.
  • the manner of sending the first notification information is the same as that of the foregoing embodiment, and details are not described herein again.
  • the number of symbols occupied by the second control data in the normal downlink data subframe is 1 or 2 or 3, and the first control data sent by the relay device to the eNB occupies the number of symbols.
  • the information indicates that the first control control data occupies 1 symbol
  • the B2 part determines the value of K_GP as 0, and the eNB determines that the possible value of K is 2 or 3 or 4, so that the first notification information needs to occupy 2 bits, which will cause data.
  • a portion of the resources in the sub-frame are wasted.
  • the B3 part determines the value of K_GP as 1, and the possible value of K determined by the eNB is 3 or 4, so that the first notification information can occupy only 1 bit, and the resources in a part of the data sub-frame can be saved.
  • the eNB determines the start symbol for sending the service data to the relay device. position.
  • one eNB communicates with multiple relay devices, and different relay devices have different first control data occupation symbols, and the start symbol positions of the service data determined by the eNB are different.
  • the data sub-frames on the relay device side and the eNB-side are configured as MBSFN data sub-frames.
  • FIG. 7 is another schematic structural diagram of the relay device and the eNB data subframe involved in the embodiment of the present invention. .
  • the inclusion of a GP at the end of the MBSFN data sub-frame allows the relay device to have time to transition from the state of the service data transmitted by the receiving eNB to the transmission of the first control data to the R_UE.
  • the first control data is converted to the state of the R-UE to the state of the service data transmitted by the receiving eNB, and the state transition from the state of the service data transmitted by the receiving eNB to the state of transmitting the first control data to the R-UE.
  • the GP added between the first control data and the service data received from the eNB, and the GP added at the end of the MBSFN data subframe may be different in length.
  • the eNB in the data subframe of the eNB, the eNB sends the second control data to the UE within the time occupied by the second control data, and after the eNB sends the second control data, the eNB sends the service data to the relay device or sends the data. Data to the UE.
  • the implementation process of the data transmission method between the eNB and the relay device is similar to the case when the eNB data subframe uses the normal data subframe, except that the data subframe of the eNB is the MBSFN data sub-frame.
  • the number of symbols occupied by the second control data in the MBSFN data subframe of the eNB is different from when the data subframe of the eNB is a normal data subframe.
  • the number of symbols occupied by the second control data of the eNB is 1 or 2.
  • the eNB starts transmitting service data to the relay device from the fourth symbol.
  • the relay device When the eNB accesses the eNB for the first time, the relay device knows the number of symbols occupied by the second control data in the MBSFN data subframe of the eNB and the length of the CP used by the data subframe of the eNB, when the eNB is in the MBSFN data subframe.
  • the number of symbols occupied by the second control data is 1, and the data subframe of the eNB adopts the extended CP
  • the number of symbols occupied by the second control data of the eNB is 1 or 2, which is occupied by the first control data of the relay device.
  • the number of symbols is 1 or 2
  • the value of K_GP is 0 or 1
  • the value of K can be determined to be 4 or 3 according to formula (1), so in one embodiment, the eNB can start transmitting traffic from the 4th symbol.
  • the data is sent to the relay device, and the relay device can receive the service data from the fourth symbol.
  • the relay device sends service data to the eNB.
  • FIG. 8 is a flowchart of Embodiment 5 of a data transmission method according to the present invention, including:
  • Step 501 The relay device determines, according to its own first control data occupation symbol number and the second control data occupation symbol number of the eNB, the start symbol position of the service data sent to the eNB in the MBSFN data subframe of the relay device. .
  • the number of symbols occupied by the first control data is the number of symbols occupied by the control data in the MBSFN subframe of the relay device.
  • Step 502 The relay device sets the service data at the start symbol position, and sends the service data to the eNB.
  • FIG. 9 is a flowchart of Embodiment 6 of a data transmission method according to the present invention, including:
  • Step 601 The eNB receives service data sent by the relay device.
  • Step 602 The eNB determines, according to the first control data occupation symbol number of the relay device and the second control data occupation symbol number of the eNB, a start symbol of the service data sent by the relay device in the MBSFN data subframe of the relay device. position.
  • the number of symbols occupied by the first control data is the number of symbols occupied by the control data in the data sub-frame of the relay device MBSFN.
  • Step 6 03 The eNB parses the service data sent by the relay device from the determined start symbol position.
  • FIG. 10 is a schematic diagram showing still another structure of a data subframe of a relay device and an eNB involved in the embodiment of the present invention.
  • the eNB sends the second control data to the UE within a time occupied by the second control data of the MBSFN data subframe of the eNB, and after passing through one GP, the eNB in turn receives the transmission sent by the relay device.
  • Business data After receiving the service data sent by the relay device, after passing through a GP, the MBSFN subframe ends.
  • the inclusion of a GP at the end of the MBSFN data sub-frame allows the eNB to have time to transition from the state of receiving the service data transmitted by the relay device to the state of transmitting the second control data to the UE. Adding a GP between the second control data in the MBSFN data subframe of the eNB and the service data transmitted from the eNB, and adding a GP at the end of the MBSFN data subframe, so that the eNB can complete the transmission of the second control data
  • the state of the UE is switched to the state of receiving the traffic data transmitted by the relay device, and the state transitioning from the state of the service data transmitted by the receiving relay device to the state of transmitting the second control data to the UE.
  • the GP added between the second control data and the service data transmitted from the relay device, and the GP added at the end of the MBSFN data subframe may be different in length.
  • the relay device transmits the first control data to the R-UE within the time occupied by the first control data, and then the relay device sends the service data to the eNB.
  • the relay device may occupy the first control data in the MBSFN subframe of the relay device. Send to the eNB.
  • the eNB is initially connected to the eNB, the number of symbols occupied by the second control data in the MBSFN subframe of the eNB may be known.
  • the relay device determines in step 502 that the start symbol position of the service data transmitted to the eNB can be performed according to formula (2).
  • M is the start symbol position of the service data transmitted to the eNB determined by the relay device in the MBSFN subframe of the relay device, and K 3 represents the earliest symbol position that the relay device can send data to the eNB.
  • K_GP is 1. The reason why K_GP takes a value of 1 in formula ( 2 ) is explained in detail below.
  • the data subframe of the eNB is a normal CP
  • the normal CP is usually the same as the case where the eNB adopts the normal CP and transmits the service data, but the data transmission direction changes. Therefore, when the relay device sends the service data to the eNB, the second control data is occupied by the eNB.
  • the number of symbols is 1 or 2, and the value of K_GP is 1.
  • the relay device data sub-frame is usually a normal CP
  • one symbol of the eNB is about 11 microseconds longer than the symbol of the relay device (ie, 16.7- 4. 7), so the symbols in the data sub-frame of the relay device and the eNB are only aligned with the starting position of the first symbol. If the number of symbols occupied by the second control data of the eNB is 1, when the eNB transmits its first symbol, it is already in the middle of the second symbol of the data subframe of the relay device, so the eNB cannot resolve the relay device. The second symbol.
  • the eNB transmits the first symbol to the third symbol of the relay device for about 50 microseconds, and can completely switch to the receiving state when the relay device transmits the third symbol, so in this case, the eNB is the earliest.
  • the value of the K_GP is the number of symbols occupied by the eNB-side second control data, whether 1 or 2 1.
  • the eNB may also determine the location of the start symbol of the service data transmitted by the relay device according to formula (2).
  • the number of symbols occupied by the first control data is different from the number of symbols occupied by the second control data, and the value of M is different.
  • the eNB When the number of the first control data occupation symbols in the MBSFN data subframe of the relay device initially accessing the eNB or the relay device changes, the eNB receives the first control data occupation symbol number sent by the relay device.
  • the eNB receives the service data transmitted by the relay device starting from the third symbol.
  • the eNB receives the first control data occupation symbol number sent by the relay device.
  • the eNB parses the service data transmitted by the relay device from the third symbol.
  • the eNB starts receiving the service data transmitted by the relay device from the third symbol.
  • the relay device can start transmitting service data from the 4th symbol to the eNB, and the eNB can The 4 symbols begin to parse the business data.
  • the receiver of the service data can clearly determine according to the formula (1) or (2).
  • the sender and the receiver using the service data respectively determine the start symbol of the service data according to formula (1) or according to formula (2)
  • the way of the location without the sender of the service data transmitting the originating symbol position of the service data determined by itself to the receiver through a separate message, because if the sender determines the service through a separate message
  • the location of the data start symbol is sent to the receiver, which consumes resources and may cause some useful service data to be transmitted in time.
  • FIG. 11 is a schematic structural diagram of Embodiment 1 of a data transmission apparatus according to the present invention.
  • the data transmission apparatus includes a first determination module 11 and a first transmission module 12 that are connected.
  • the working principle of the device is: the first determining module 11 determines the location of the start symbol of the service data sent to the second device in the data subframe of the data transmission device; the location of the start symbol is based on the data of the data transmission device The number of control data occupation symbols in the subframe and the number of control data occupation symbols in the data subframe of the second device are determined; the first sending module 12 sets the service data at the position of the start symbol determined by the first determining module 11, and The service data is sent to the second device.
  • FIG. 12 is a schematic structural diagram of Embodiment 2 of a data transmission apparatus according to the present invention, specifically, FIG.
  • the data transmission device shown in FIG. 12 is an eNB, and the second device is a relay device.
  • the data transmission device further includes a first setting module 13 and a first setting module 13 and a first determining module 11 on the basis of the first embodiment. connection.
  • the first setting module 13 is configured to set a value of the first parameter according to the length of the CP used in the data subframe of the eNB and the number of control data occupation symbols in the MBSFN data subframe of the relay device;
  • the first setting module 13 sets the value of the first parameter to 1 or 0;
  • the first setting module 13 sets the value of the first parameter to 0;
  • the CP used in the data subframe is a normal CP, and the number of control data occupation symbols in the MBSFN data subframe of the relay device is 1 or 2
  • the first setting module 13 sets the value of the first parameter to 1.
  • the first determining module 1 is specifically configured to: according to the number of control data occupation symbols in the MBSFN data subframe of the relay device, the number of control data occupation symbols in the data subframe of the eNB itself, and the first setting of the first setting module 13 The value of the parameter determines the location of the start symbol in the data sub-frame of the eNB for the traffic data transmitted to the relay device.
  • the data transmission apparatus shown in Fig. 12 further includes a first receiving module 14 connected to the first determining module 1 1 and the first setting module 13 respectively.
  • the first receiving module 14 receives the number of control data occupation symbols in the MBSFN data subframe of the relay device sent by the relay device, and sends the number of control data occupation symbols in the received MBSFN data subframe of the relay device to The first determining module 1 1 and the first setting module 13 are.
  • the first determining module 1 1 can specifically determine the location of the start symbol of the service data sent to the relay device in the eNB-side data subframe according to the formula (1), and the determining method is similar to the foregoing data transmission method embodiment. I will not repeat them here.
  • the data transmission apparatus shown in FIG. 12 further includes a second sending module 15 , the second sending module 15 is connected to the first determining module 11 , and the second sending module 15 sends the first notification information to the relay device, and the first notification information And indicating a location of a start symbol of the service data sent by the eNB to the relay device in a data subframe of the eNB.
  • the data transmission device shown in FIG. 11 may be a relay device, and the second device may be an eNB, and the first determining module 11 may specifically determine, according to formula (2), service data sent to the eNB. The position of the start symbol in the data sub-frame of the device.
  • the method may further include: a first acquiring module, configured to acquire a number of control data occupation symbols in a data subframe of the eNB, and obtain a control data occupation number of the data subframe of the acquired eNB Send to the first determining module 11.
  • FIG. 13 is a schematic structural diagram of a third embodiment of a data transmission apparatus according to the present invention, including a second receiving module 21, a second determining module 22, and a first parsing module 23, respectively, and a first parsing module 23 and a second
  • the receiving module 21 and the second determining module 22 are connected.
  • the working principle of the device is: the second receiving module 21 receives the service data sent by the first device; the second determining module 22 determines the location of the starting symbol in the data subframe of the first device sent by the first device;
  • the first parsing module 2 3 analyzes the service data received by the second receiving module 21 from the position where the second determining module 22 determines the start symbol.
  • FIG. 14 is a schematic structural diagram of a fourth embodiment of a data transmission apparatus according to the present invention.
  • the data transmission apparatus shown in FIG. 14 is a relay apparatus, and the second apparatus is an eNB.
  • the data transmission apparatus is based on the third embodiment.
  • the second setting module 24 is further connected to the second determining module 24, and the second setting module 24 is configured to control the number of occupied data symbols and the eNB according to the MBSFN data subframe of the relay device itself.
  • the length of the CP used in the data subframe sets the value of the first parameter; when the CP used in the data subframe of the eNB is an extended CP, and the number of control data occupation symbols in the MBSFN data subframe of the relay device is 1,
  • the second setting module 24 sets the value of the first parameter to 1 or 0; when the CP used in the data subframe of the eNB is an extended CP, and the number of control data occupation symbols in the MBSFN data subframe of the relay device is 2
  • the second setting module 24 sets the value of the first parameter to 0; when the CP used in the data subframe of the eNB is a normal CP, and the control data occupation symbol in the MBSFN data subframe of the relay device Number of 1 or 2, the second setting module 24 sets the value of the first parameter is 1.
  • the second determining module 22 is specifically configured to: according to the number of control data occupation symbols in the MBSFN data subframe of the relay device itself, the number of control data occupation symbols in the data subframe of the eNB, and the first parameter set by the second setting module. And determining, according to the value, the location of the start symbol in the data subframe of the eNB of the eNB; the control data occupying the number of the information in the data subframe of the eNB is the number of symbols occupied by the control data in the data subframe of the eNB or The range of the number of symbols occupied by the control data in the data sub-frame of the eNB.
  • the second determining module 22 determines a detailed manner of the location of the start symbol of the sent service data in the data subframe of the eNB, and may be determined according to the formula (1), which is similar to the foregoing data transmission method embodiment, where Let me repeat.
  • the data transmission apparatus shown in FIG. 14 may further include a second obtaining module 25, configured to acquire the number of control data occupation symbols in the data subframe of the eNB and the length of the CP used in the data subframe of the eNB, and The length of the control data occupation symbol number in the data subframe of the eNB and the length of the CP used in the data subframe of the eNB are sent to the second determining module 22 and the second setting module 24.
  • a second obtaining module 25 configured to acquire the number of control data occupation symbols in the data subframe of the eNB and the length of the CP used in the data subframe of the eNB, and The length of the control data occupation symbol number in the data subframe of the eNB and the length of the CP used in the data subframe of the eNB are sent to the second determining module 22 and the second setting module 24.
  • the data transmission device shown in FIG. 13 may be an eNB, and the second device may be a relay device, and the second determining module 22 may specifically determine, according to formula (2), the service data sent by the relay device. The position of the start symbol in the data sub-frame of the relay device.
  • a third receiving module may be further configured to receive the number of control data occupation symbols in the MBSFN data subframe of the relay device sent by the relay device, and receive the received relay MBSFN data of the device The number of control data occupation symbols in the frame is sent to the second determination module 22.
  • the first device may determine, according to the number of control data occupation symbols in the data sub-frame of the data device and the number of control data occupation symbols in the data subframe of the second device, the start of the service data sent to the second device.
  • the location of the symbol, the second device may also determine the location of the start symbol of the service data sent by the first device, so that the service data in the data subframe transmitted by the first device and the second device cannot be known to each other.
  • the part of the service data may not be parsed or the data transmission efficiency is not high.
  • the first device may be an eNB, and the second device may be a relay device; or the first device may be a relay device.
  • the second device may be an eNB.
  • the foregoing method includes the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

Les modes de réalisation de la présente invention portent sur un procédé et un appareil de transmission de données, le procédé comprenant les étapes suivantes : un premier appareil détermine la position du symbole de départ des données de service qui sont envoyées à un second appareil dans la sous-trame de données du premier appareil; la position du symbole de départ est déterminée conformément au nombre de symboles occupés par des données de commande dans la sous-trame de données du premier appareil et au nombre de symboles occupés par les données de commande dans la sous-trame de données du second appareil; le premier appareil fixe les données de service dans la position du symbole de départ et envoie les données de service au second appareil. Les problèmes selon lesquels une partie des données de services ne peut pas être analysée ou selon lesquels un rendement de transmission de données n'est pas élevé, qui sont provoqués par l'incapacité de l'appareil de relais et de la station de base à obtenir la position du symbole de départ de données de service dans la sous-trame de données envoyées par chacun d'eux, pourraient être résolus par les modes de réalisation de la présente invention.
PCT/CN2009/071369 2009-04-20 2009-04-20 Procédé et appareil de transmission de données WO2010121411A1 (fr)

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