WO2008067715A1 - Procédé, système et dispositif de transmission de données - Google Patents

Procédé, système et dispositif de transmission de données Download PDF

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Publication number
WO2008067715A1
WO2008067715A1 PCT/CN2007/003274 CN2007003274W WO2008067715A1 WO 2008067715 A1 WO2008067715 A1 WO 2008067715A1 CN 2007003274 W CN2007003274 W CN 2007003274W WO 2008067715 A1 WO2008067715 A1 WO 2008067715A1
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WO
WIPO (PCT)
Prior art keywords
index
base station
absolute
terminal
relative
Prior art date
Application number
PCT/CN2007/003274
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English (en)
Chinese (zh)
Inventor
Jie Bai
Haijun Zhou
Fei Qin
Jinling Hu
Original Assignee
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.)
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Publication date
Application filed by Datang Mobile Communications Equipment Co., Ltd filed Critical Datang Mobile Communications Equipment Co., Ltd
Publication of WO2008067715A1 publication Critical patent/WO2008067715A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to data transmission technologies in the field of communications, and in particular, to a data transmission method, system and apparatus. Background technique
  • the uplink enhanced transport format combination (E-TFC) selection process is performed at the terminal.
  • the selected transport format combination indication message (E-TFCI) is transmitted on the enhanced uplink control channel (E-UCCH). .
  • TBS transport block size
  • the TFCI transmission mode of the non-high-speed uplink packet access is:
  • the adaptive modulation coding (AMC) is not used in the uplink existing service, and the TFC set is relatively Relatively fixed, the TFCI is transmitted along with the data on the Dedicated Physical Channel (DPCH).
  • the TFCS is configured by the Radio Network Controller (RNC) instead of the base station (NodeB).
  • RNC Radio Network Controller
  • the TBS change in the TFCI is a slow adjustment process.
  • This TFC configuration method cannot satisfy the HSUPA. The need for fast scheduling and adaptive transmission.
  • the AMC mode is adopted.
  • the LCR TDD Low Speed Downlink Packet Access
  • 64 TBSs are defined for different terminal capability levels, corresponding to 64 transmission rates.
  • the NodeB Based on the feedback of the terminal, the NodeB selects the appropriate transmission rate according to the scheduling algorithm, and transmits the absolute index of the 6-bit TBS on the high-speed shared control channel.
  • the NodeB and the terminal have previously defined the TBS absolute index under various terminal capability levels. Pair with TBS It should be related, therefore, the TBS can be decoded according to the absolute index terminal of the TBS.
  • HSUPA high-speed uplink packet access
  • the range of time slots and spreading factors varies, so the range of TBS changes is larger, and the TBS level is more than HSDPA.
  • HSUPA is still defined as 64 TBSs
  • MAC-e Media access layer
  • the NodeB In the E-TFCI transmission mode of HSUPA, the NodeB defines 128 TBSs for each time slot.
  • the terminal performs E-TFC selection according to the scheduling permission information of the NodeB, and encodes the 7-bit TBS absolute index and passes the E- The UCCH is notified to the NodeB.
  • the method steps are described in detail below.
  • the NodeB first allocates a corresponding power resource (PRRI), a time slot resource (TRRI), a code channel resource (CRRI), and a used E-UCCH to the terminal through a downlink control channel (E-AGCH).
  • the number (ENI) which is collectively referred to as scheduling permission information.
  • the PRRI is used to indicate power resource related information
  • the TRRI is used to indicate the number of time slots used by the terminal to transmit data
  • the CRRI is used to inform the terminal to use the orthogonal variable spreading factor (OVSF) code number used in transmitting data, CRRI and
  • OVSF orthogonal variable spreading factor
  • Table 1 The correspondence relationship of the OVSF codes is as shown in Table 1, in which the OVSF code is the i-th channel code of Q, and j is the value of CRRI, so that the used OVSF code can be obtained according to CRRI.
  • the terminal performs E-TFC selection according to the scheduling permission information of the NodeB, and then performs the number.
  • the control information E-TFCI related to the data transmission, the hybrid automatic retransmission process number (HARQ Process ID) and the retransmission sequence number (RSN) are recovered by the E-UCCH and the enhanced dedicated transmission channel (E-DCH).
  • the transmission on the enhanced uplink physical channel (E-PUCH) is used, where the E-TFCI includes the TBS absolute cable 1.
  • the NodeB After receiving the E-PUCH, the NodeB first decodes the E-UCCH, performs HARQ combining and decoding on the service data according to the solved E-TFCI, HARQ Process ID, and RSN, according to the Cyclic Redundancy Check (CRC) result.
  • the response signal (ACK) or the error response signal (NACK) is fed back to the terminal through the E-DCH HARQ response indication channel (E-HICH) corresponding to the terminal.
  • E-HICH E-DCH HARQ response indication channel
  • the TBS of each slot is divided into 128 types.
  • the absolute index of the transmitted TBS needs 7 bits, and the HARQ Process ID and the RSN each have 3 bits and 2 bits, then the E-UCCH information
  • the total number of bits is 12 bits, which cannot be encoded by Reed Muller (32, 10).
  • convolutional codes or Reed Muller (48, 12) codes may be used. This increases the number of bits after encoding, increases signaling overhead, and may increase system complexity due to the introduction of new coding methods. Summary of the invention
  • the invention provides a method, a system and a device for data transmission, so as to solve the problem that the number of bits occupied by the TFCI in the prior art is large, the signaling overhead is increased, and the new coding mode may be added. System complexity issues.
  • the present invention provides a method for data transmission, which is applied to a system comprising a base station and at least one terminal, the method comprising the steps of:
  • the terminal obtains an absolute index of the transport block size from the scheduling grant information sent by the base station, and obtains a relative index corresponding to the absolute index of the transport block size by using the set absolute index and the relative index correspondence, and includes A format combination indicating a relative index of a transport block size indicates that a message and data are sent to the base station;
  • the base station obtains an absolute index corresponding to the relative index in the format combination indication message by using the correspondence relationship;
  • the base station parses the received data by using the absolute index.
  • the present invention also provides a system for data transmission, the system comprising a base station and at least one terminal, wherein
  • a terminal configured to obtain an absolute index of a transport block size according to the scheduling grant information sent by the base station, and obtain a relative index corresponding to an absolute index of the transport block size by using a correspondence between the set absolute index and the relative index, and A format combination indicating a relative index of a transport block size indicates that a message and data are sent to the base station;
  • the base station is configured to obtain an absolute index corresponding to the relative index in the format combination indication message by using the correspondence, and parse the received data by using the absolute index.
  • the present invention further provides a terminal, which communicates through a base station and a network, the terminal includes: a converting unit, configured to obtain an absolute index of a transport block size according to scheduling permission information sent from the base station, by using the preset absolute index Obtaining a relative index corresponding to an absolute index of the transport block size, and transmitting the relative index to the sending unit, where the sending unit is configured to combine a format including a relative index of the transport block size
  • the indication message and data are sent to the base station.
  • the present invention also provides a base station, which provides a wireless connection for more than one terminal to communicate with a network, the base station comprising:
  • a parsing unit configured to obtain an absolute index corresponding to a relative index in a format combination indication message sent by the terminal by using a correspondence between the preset absolute index and a relative index, and use the absolute index to receive the received data Analyze.
  • the present invention obtains an absolute index of the transport block size according to the scheduling grant information, and obtains a relative index corresponding to the absolute index of the transport block size by setting a correspondence between the absolute index and the relative index in advance, and includes a relative index including the transport block size.
  • the format combination indication message and the data are sent to the base station, and the base station obtains the absolute index corresponding to the relative index in the format combination indication message by using the corresponding relationship, and uses the absolute index to parse the received data, J.
  • the transport format combination indicates the number of bits occupied by the message and the overhead of signaling, and reduces the complexity of the system.
  • FIG. 1(a) and 1(b) are schematic diagrams showing the structure of the system of the present invention.
  • FIG. 3 is a schematic diagram of simulation of a TBS range corresponding to different ENIs according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a terminal according to the present invention.
  • FIG. 5 is a schematic structural diagram of a base station of the present invention. detailed description
  • the present invention provides a data transmission system in which a correspondence between an absolute index and a relative index is set in advance, the system includes a base station and at least one terminal, wherein the terminal is configured to use scheduling grant information sent from the base station Obtaining an absolute index of the transport block size, obtaining a relative index corresponding to the absolute index of the transport block size by using the correspondence, and transmitting a format combination indication message and data including a relative index of the transport block size to the base station; The absolute index corresponding to the relative index in the format combination indication message is obtained by using the corresponding relationship, and the received data is parsed by using the absolute index.
  • the number of bits occupied by the transmission relative index is smaller than the number of bits occupied by the transmission absolute index.
  • the system may further include a server connected to the base station, the server having a storage unit, configured to save the correspondence between the preset absolute index and the relative index.
  • the storage unit transmits the corresponding relationship to the base station and the terminal respectively by signaling, and the structure of the system is shown in FIG. 1( a ).
  • the server may be a wireless network controller in a current mobile communication system or a network entity such as an operation and maintenance center.
  • the terminal may also have a storage unit for saving the preset absolute Corresponding relationship between the index and the relative index;
  • the base station may also have a storage unit, configured to save the correspondence between the preset absolute index and the relative index, and the structure of the system is shown in FIG. 1
  • the embodiment of the present invention takes the terminal to transmit data to the NodeB as an example.
  • FIG. 2 it is a schematic flowchart of the steps of the embodiment of the present invention.
  • Embodiments of the invention include the following steps:
  • Step 201 The terminal obtains an absolute index of the TBS according to the scheduling permission information sent from the NodeB, obtains a relative index corresponding to the absolute index of the TBS by using a correspondence between the absolute index and the relative index, and includes a TFCI and a relative index of the TBS. Data is sent to the base station.
  • the information of the terminal is obtained first, so the terminal randomly accesses the uplink control channel (E-RUCCH) or the E-DCH medium access layer protocol data unit on the dedicated transport channel (E-DCH).
  • the scheduling information (Scheduling Information) is reported to the NodeB, and the scheduling information mainly includes the total buffer size of the terminal, the cache percentage of the highest priority data, and the priority of the data to be sent by the terminal. Level, the measured value of the path loss of the local cell and the neighboring cell, and the remaining power available to the terminal.
  • the NodeB After the NodeB obtains the information of the terminal, it sends scheduling permission information to the terminal.
  • the data transmission process may use 1 to 5 uplink time slots, and the OVSF code may be any one of 1, 2, 4, 8, and 16.
  • the code rate support variation range may theoretically range from 0 to 1, modulation.
  • the mode can adopt the QPSK or 16QAM mode, so the range of variation of the TBS is relatively large.
  • the TBS of each time slot is divided into 128 types. In practical applications, in order to ensure coding efficiency, the lowest bit rate R1 will generally take a value greater than 0, for example, 0.25.
  • the bit rate range supported by QPSK ranges from R1 to Rthd
  • the code rate supported by 16QAM ranges from Rthd/2 to 1, where Rthd ⁇ l
  • the code rate supported by QPSK is recommended.
  • the range is from 0.125 to 0.88
  • the 16QAM has a code rate range of 0.44 to 1.
  • the scheduling grant information sent by the NodeB to the terminal mainly includes: TRRI, CRRI, and ENI.
  • TRRI 11100, since TRRI uses up to 5 time slots, the value is 1
  • the use of the time slot, the meaning here is to use 3 time slots;
  • ENI 000, according to One E-UCCH can be used for the correspondence between ENI and E-UCCH.
  • the NodeB not only allocates the above content to the terminal, but also allocates to the terminal: Resource Effective Duration (RDI), which is set by the RNC to indicate the duration of each resource allocated for the terminal; E-AGCH Cycling Sequence Number (ECSN), The outer loop power control is used to assist the E-AGCH; the response indication channel (EI) is used to inform the terminal which E-HICH carries the feedback response thereto; the E-DCH radio network temporary identifier (E-RNTI), The terminal is identified to the NodeB.
  • RDI Resource Effective Duration
  • ECSN E-AGCH Cycling Sequence Number
  • EI response indication channel
  • E-RNTI E-DCH radio network temporary identifier
  • the scheduling function is transferred from the RNC to the Node B, the scheduling delay is reduced, and the AMC is the E-TFC selection by the terminal according to the scheduling grant information (PRRI, CRRI, TRRI and ENI) sent by the NodeB, and the Node B
  • the content of the scheduling permission information sent to the terminal is variable every time, so the TBS used by the terminal for each upload is changed rapidly.
  • the signal-to-noise ratio of the NodeB receiver is relatively low due to poor channel conditions.
  • E-UCCH coded with Reed Muller 32, 10
  • the performance is poor at this time, which cannot provide a prerequisite guarantee for decoding service data.
  • the E-UCCH performance under the noise ratio is that multiple E-UCCHs and E-DCHs are multiplexed into the E-PUCH in one time slot and then transmitted. After receiving the E-PUCH data, the NodeB will have multiple E-UCCHs. After the combination, the decoding is performed. Since the time diversity gain of multiple E-UCCHs is utilized, the E-UCCH performance is improved, thereby improving the reliability of the control signaling under low SNR conditions.
  • the ENI can be associated with the code rate of the transmitted data portion, and the low code rate is used more.
  • E-UCCH uses less E-UCCH at higher bit rates.
  • the terminal converts the determined absolute index correspondence into a relative index according to the correspondence between the absolute index and the relative index that is set in advance.
  • the corresponding relationship includes: determining the absolute size of the determined transport block The index and the continuous natural number starting with 1 are sequentially converted, and the converted natural number is used as a relative index. Of course, other corresponding methods may also be used.
  • the largest TBS is expanded according to
  • the frequency factor (SF) takes a value of 1, and adopts the 16QAM modulation mode, and the code rate is calculated as 1, so that the range of supported TBSs is different for different SFs.
  • the value of SF can be obtained according to the CRRI sent by the NodeB, and the ENI has a correspondence with the code rate of the transmitted data part, that is, a total of 5 ⁇ 5 ⁇ can be obtained according to TRRI, CRRI and ENI.
  • TRRI CRRI
  • ENI ENI
  • There are several combinations of the maximum E-UCCH where the maximum number of slots of TRRI is 5 and CRRI corresponds to 5 types of SF.
  • the terminal can transmit the TBS relative index to the NodeB, that is, a combination determined by the scheduling information. The relative index of the TBS.
  • the simulation diagram of the TBS range corresponding to the ENI is shown in FIG. 3, and the code rate ranges corresponding to different ENIs are different. Since the code rate supported by the QPSK in this embodiment is from 0.125 to The bit rate of 0.88, 16QAM ranges from 0.44 to 1, so when the code rate range corresponding to E-UCCH is less, the code rate is a two-stage discontinuous range.
  • the terminal sends the TFCI and the data containing the TBS relative index to the base station.
  • the HARQ Process ID and the RSN each have 3 bits and 2 bits, and the Reed Muller (32, 10) code can also be used.
  • Step 202 The NodeB obtains an absolute index corresponding to the relative index in the format combination indication message by using a correspondence between the absolute index and the relative index, and parses the received data by using the absolute cable.
  • the absolute index of the used TBS can be determined by using the correspondence between the absolute index and the relative index in advance, thereby obtaining the size of the TBS.
  • the base station can then parse the received data using the size of the obtained TBS.
  • the correspondence between the absolute index and the relative index may be stored in the terminal and the base station, respectively; or may be stored in a server connected to the base station, and the terminal establishes a communication connection with the base station to communicate with the network.
  • the corresponding relationship is separately transmitted to the base station and the terminal by signaling, where the server may be a wireless network controller in the current mobile communication system or a network entity such as an operation and maintenance center.
  • the number of bits occupied when transmitting the TFCI is reduced in ensuring the reliability of the signaling, and the new coding mode is not added at the same time, and the overhead of the signaling transmission and the complexity of the system are reduced.
  • the present invention also provides a terminal, as shown in Fig. 4, which communicates through a base station and a network, the terminal including a converting unit 11 and a transmitting unit 12.
  • the converting unit 11 is configured to obtain an absolute index of the transport block size according to the scheduling grant information sent by the base station, and obtain a relative index corresponding to the absolute index of the transport block size by using the correspondence between the preset absolute index and the relative index.
  • sending the relative index to the sending unit; the sending unit 12 is configured to send a format combination indication message and data including a relative index of the transport block size to the base station.
  • the invention also provides a base station, as shown in FIG. 5, providing a wireless connection for more than one terminal.
  • the base station includes a parsing unit 21, configured to obtain an absolute index corresponding to the relative index in the format combination indication message sent by the terminal by using the correspondence between the preset absolute index and the relative index, and The received data is parsed using the absolute index.

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

Abstract

L'invention concerne un procédé de transmission de données, y compris une station de base et au moins un terminal, la relation correspondante entre l'indice absolu et l'indice relatif étant préréglé. Ledit procédé comprend les étapes suivantes : A. le terminal obtient l'indice absolu du TBS sur la base des données d'autorisation d'ordonnancement transmises par la station de base, puis obtient l'indice relatif à l'aide de la relation correspondante, transmet le message indicateur de la combinaison de format contenant l'indice relatif du TBS et les données à la station de base; B. la station de base obtient l'indice absolu correspondant à l'indice relatif dans le message indicateur de la combinaison de format; C. la station de base analyse les données reçues à l'aide de l'indice absolu. La présente invention permet de réduire le nombre de bits occupé par le message indicateur de la combinaison de format de transport et les bits auxiliaires de signalisation, ainsi que la complexité du système. L'invention concerne également un système et un dispositif de transmission de données.
PCT/CN2007/003274 2006-12-07 2007-11-20 Procédé, système et dispositif de transmission de données WO2008067715A1 (fr)

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CN200610164906.2 2006-12-07
CN2006101649062A CN101197611B (zh) 2006-12-07 2006-12-07 一种数据传输的方法、系统及装置

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CN101860924B (zh) * 2009-04-10 2012-12-12 电信科学技术研究院 一种确定能力等级的方法和终端
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CN102404802B (zh) * 2010-09-16 2015-03-11 电信科学技术研究院 一种应答信息的传输方法、基站及用户终端
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CN103580776B (zh) * 2012-07-19 2016-11-23 电信科学技术研究院 数据传输方法和装置
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