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WO2008040209A1 - Procédé et dispositif permettant de transférer des informations dans un système de communication sans fil - Google Patents

Procédé et dispositif permettant de transférer des informations dans un système de communication sans fil Download PDF

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Publication number
WO2008040209A1
WO2008040209A1 PCT/CN2007/070652 CN2007070652W WO2008040209A1 WO 2008040209 A1 WO2008040209 A1 WO 2008040209A1 CN 2007070652 W CN2007070652 W CN 2007070652W WO 2008040209 A1 WO2008040209 A1 WO 2008040209A1
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WO
WIPO (PCT)
Prior art keywords
information
user
scrambling
different
sequence
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2007/070652
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English (en)
Chinese (zh)
Inventor
Bin Li
Wei Ruan
Linfeng Xia
Yinggang Du
Yi Luo
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
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Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2008040209A1 publication Critical patent/WO2008040209A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H04L5/0021—Time-frequency-code in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and system for implementing information transmission in a wireless communication system.
  • 3GPP2 3rd Generation Mobile Communications Cooperation Project Team 2 proposes AIE (Air Interface)
  • AIE uses new air interface technology, for example, OF DM (Orthogonal Frequency Division)
  • OFDMA Orthogonal Frequency Division Multiplexing
  • CDMA Code Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • CDMA Code Division Multiple Access
  • the reverse transmission band of AIE technology is 5MHz, which includes a total of 512 subcarriers, and each 16 subcarriers form a basic node; the entire 5MHz bandwidth is composed of 32 basic nodes, each basic node corresponds to an index, from 0 to 31.
  • a part of frequency band resources are allocated for transmitting information of a CD MA user over the entire transmission bandwidth, and the part of the bandwidth may be divided into one or more sub-segments, each field having a bandwidth of 1.25 MHz, and the remaining available resources are still used. OFDMA mode transmission.
  • the OFDMA data, as well as the CDMA data and control information after being mapped by the subcarriers, can be subjected to subsequent transmission processing and transmitted through the antenna.
  • F-ACK forward response
  • F-PCB forward power control
  • the allocation information and the like are transmitted on the F-SCCH (Forward Shared Signaling Channel) channel.
  • F-SCCH Forward Shared Signaling Channel
  • the F-ACK channel transmits a sequence of information bit sequences of length 32, and the information of each information bit is fed back to one of the 32 basic nodes. After the information bit sequence is modulated, each information bit forms three QPSK (Quadrature Phase Shift Keying) symbols, which ultimately produces a sequence of F-ACK information of length 96.
  • the F-ACK information sequence is modulated onto different subcarriers and transmitted on each forward physical frame.
  • the F-ACK channel cannot carry multiple F-ACK bit information for a certain basic node, but can only be carried by a certain basic node.
  • One F-ACK bit information Therefore, the current F-ACK channel cannot carry the response information for the CDM A user using the basic node.
  • F-PCB channels there is also no way to carry power control information for CDMA users using the basic node.
  • An object of the embodiments of the present invention is to provide a method and apparatus for implementing information transmission in a wireless communication system, so that CDMA technology can be used to implement single-bit information transmission in a wireless communication system, which is convenient for realizing Effective control management of services in wireless communication systems.
  • An embodiment of the present invention provides a method for implementing information transmission in a wireless communication system, including: [17] an Orthogonal Frequency Division Multiplexing (OFDM) OFDM communication system having a CDMA traffic channel in a reverse channel, for forward control
  • OFDM Orthogonal Frequency Division Multiplexing
  • the single-bit information to be transmitted in the channel is extended and scrambled, and the obtained information sequence includes user information, and the extension is information that expands the single-bit information into multiple bits;
  • the information sequence obtained by the processing is subjected to orthogonal frequency division multiplexing (OFDM) modulation processing and transmitted through an antenna.
  • OFDM orthogonal frequency division multiplexing
  • An embodiment of the present invention provides an apparatus for implementing information transmission in a wireless communication system, including: [20] a single-bit information spread scrambling processing unit, in an OFDM communication system in which a CDMA traffic channel exists in a reverse channel, a single-bit information for a user to be transmitted is extended and a scrambling process is performed using the user information,
  • An extension is information that expands single-bit information into multiple bits;
  • the information transmission processing unit is configured to perform the information sequence obtained by the single-bit information expansion scrambling processing unit
  • the OFDM modulation process is performed and transmitted through an antenna.
  • the present invention mainly expands the original channel for transmitting single-bit information, so that the channel can support both OFDM service and CDMA service, thereby greatly reducing the AIE system. Control signaling and scheduling complexity of CDMA services.
  • FIG. 1 is a schematic diagram of a transmission bandwidth allocation manner in the prior art
  • FIG. 2 is a schematic structural diagram of a specific implementation of the device according to the present invention.
  • FIG. 3 is a schematic structural diagram of a specific implementation of Embodiment 1 of the present invention.
  • Embodiment 2 of the present invention is a schematic structural diagram of a specific implementation of Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a specific implementation of Embodiment 3 of the present invention.
  • Figure 6 is a schematic structural view 1 of a specific implementation structure of Embodiment 4 of the present invention.
  • FIG. 7 is a second schematic diagram of a specific implementation structure of Embodiment 4 of the present invention.
  • FIG. 8 is a schematic structural diagram of a specific implementation of Embodiment 5 of the present invention.
  • FIG. 9 is a schematic structural diagram of a specific implementation of Embodiment 6 of the present invention.
  • FIG. 10 is a schematic structural diagram of a specific implementation of Embodiment 7 of the present invention.
  • FIG. 11 is a schematic structural diagram of a specific implementation of Embodiment 8 of the present invention.
  • the implementation scheme for implementing information transmission in a wireless communication system specifically includes: an Orthogonal Frequency Division Multiplexing OFDM communication system in which a CDMA traffic channel exists in a reverse channel, in a forward control channel.
  • the single-bit information to be transmitted is expanded and scrambled, and the obtained information sequence includes user information, and the extension is to expand the single-bit information into a plurality of bits of information; and then, the information sequence obtained by the processing is positive.
  • the method further includes: adding the information sequences of the plurality of users, and using the added information sequence of the plurality of users as the information sequence requiring OFDM modulation processing.
  • the corresponding expansion and scrambling processing may be any one of the following ways: [38] (1) performing an extended operation on the single-bit information (such as using the single-bit information Transmitting or directly repeating to a plurality of bits), obtaining a corresponding plurality of bits, and then scrambling the plurality of bits by using user information to obtain a sequence of information of the user;
  • Obtaining a sequence of information of the user for example, mapping part of bits in the user information into different orthogonal codes (for example, may be Walsh codes or discrete Fourier transform DFT codes, etc.), and using the orthogonal code pairs to different
  • the user's single-bit information is extended to obtain corresponding multiple bits; the remaining bits in the user information are also mapped into different scrambling codes, and the corresponding multiple bits of different users are scrambled and different
  • the information sequence scrambled by the scrambling code is added to obtain the information sequence of the user; or, the partial bits in the user information are mapped into different orthogonal codes, and the single bit information of different users is used by using the orthogonal codes.
  • the user information in the embodiment of the present invention may include, but is not limited to, a user's media access control identifier MA CID, or a user serial number, or a user group number, and the like.
  • the single bit information of the user in the embodiment of the present invention may include, but is not limited to, at least one of the user's response F-ACK information and the user's power control F-PCB information.
  • the process of performing the expansion and the scrambling process by using the user information further includes distinguishing the F-ACK information and the F-PCB information.
  • the processing may specifically include any one of the following:
  • the F-ACK and/or the F-PCB belonging to different mobile terminals that are to be sent are further classified according to channel quality or transmission power, and are divided into multiple groups;
  • the information to be sent is transmitted by using different transmission powers.
  • each group of to-be-transmitted information is mapped to physical channel resources by orthogonal multiplexing, and different transmission powers are used for transmission processing, or, in each group.
  • the scrambled information sequences corresponding to different users are added, and the added results are multiplied by the power gain coefficients of each group, mapped to physical channel resources by orthogonal multiplexing, and transmitted, where orthogonal multiplexing
  • the method may include: frequency division multiplexing, split multiplexing, or frequency division hybrid multiplexing; wherein, the processing divided into multiple groups includes any one of the following methods:
  • the ACK and / or F-PCB selections are divided into different groups.
  • the channel for transmitting single-bit information is extended, so that in the network of the OFDM transmission technology, the extended channel can perform transmission of single-bit information of the user.
  • the embodiment of the present invention enables the extended F-ACK channel to transmit response information for the OFDMA user by extending the current F-ACK (Forward Answer) channel and the F-PCB (Forward Power Control) channel.
  • F-ACK Forward Answer
  • F-PCB Forward Power Control
  • the acknowledgment information can also be transmitted for other (such as CDMA) users; similarly, the extended F-PCB channel can provide power control information for OFDMA users, and can also provide power for other (such as CDMA) users. Control information, and so on.
  • An embodiment of the present invention provides an improved implementation scheme of a forward control channel applicable to a CDMA service channel in a wireless mobile communication OFDM system, where the control channel includes: F-ACK, F-PCB information.
  • each user's F-ACK bit is first subjected to on-off keying modulation to generate an F-ACK symbol, where "ten 1" indicates a positive response, and a vacancy indicates a negative response; each user's F -PCB ratio First, BPSK modulation is performed first, where "ten 1" indicates the added power, indicating the power reduction.
  • the network side (such as the base station) will transmit the FA CK bit and/or F-PCB bit by orthogonal code or directly repeat the extension. Converting single-bit F-ACK or F-PCB information into N-bit information; for the extended information code sequence, scrambling the MAC ID-related scrambling code to obtain information of different users Sequence (ie, symbol sequence); After that, the sequences of different users are added and mapped to OFDMA (Orthogonal Frequency Division Multiplexing Access) system (DRCH) (distributed resource channel) or BRCH (block) Resource
  • OFDMA Orthogonal Frequency Division Multiplexing Access
  • DRCH Distributed resource channel
  • BRCH block
  • the orthogonal code comprises a Walsh code, DF
  • the F-ACK information bits of the same user and/or the F-PCB bit transmission processing manner may specifically select any one of the following:
  • mapping to different OFDM physical channel resource blocks is multiplexed together.
  • the MACID-related scrambling code may be generated by using all bits of the MACID, or may be generated by using a partial bit of the MACID.
  • the same channel e.g., F-ACK channel or F-PCB channel
  • F-ACK channel or F-PCB channel may be extended by the same code, or may be extended by different orthogonal codes.
  • the same channel of different users can be divided into two groups, which are sent through I and Q respectively.
  • the specific implementation structure of the device for implementing information transmission in the wireless communication system according to the embodiment of the present invention is as shown in FIG. 2, and mainly includes the following processing units:
  • a single-bit information extended scrambling processing unit configured to expand single-bit information of a user to be transmitted and perform scrambling processing using the user information
  • the user information includes: a media access control identifier MACID of the user;
  • the single-bit information of the user includes: a user's response F-ACK information and/or a user's F-PCB information.
  • the user in the embodiment of the present invention may be a CDMA user, or may also be an OFDMA user.
  • the single-bit information extended scrambling processing unit may specifically adopt different implementation manners, for example, may specifically include an extended processing unit and a scrambling processing unit, or only include scrambling extension processing.
  • Unit the specific implementation structure of each unit is as follows:
  • an extended processing unit configured to perform an extended operation on the single-bit information to obtain a corresponding multiple bits
  • the scrambling processing unit performs scrambling processing on the plurality of bits obtained by the extended processing unit by using the user information, and obtains an information sequence of the user, such as an information sequence corresponding to the F-ACK information, or an F-PCB information corresponding to the F-PCB information.
  • Information sequence or a sequence of information corresponding to F-ACK and F-PCB information;
  • the scrambling extension processing unit is configured to expand and scramble the single-bit information by using the scrambling code of the user information, that is, the single-bit information can be directly scrambled directly by using the MACID of the user, and the same is implemented for the single-bit information.
  • the extended operation of the bit information so that the information sequence of the user, such as the information sequence corresponding to the F-ACK information, or the information sequence corresponding to the F-PCB information, or the information sequence corresponding to the F-ACK and the F-PCB information, may be obtained. .
  • [70] an information transmission processing unit, configured to perform OFDM modulation processing on the information sequence obtained by the single-bit information expansion and scrambling processing unit, and transmit the information through the antenna;
  • the information sending and processing unit may specifically include:
  • mapping processing unit mapping the information sequence to a physical channel of an OFDMA system, such as a discrete resource channel or a block resource channel;
  • a modulation transmission processing unit configured to perform OFDM modulation processing on the information sequence, and transmit the signal to an antenna
  • the information transmission processing unit may further include a multi-user processing unit, configured to add information sequences of the plurality of users, and transmit the information sequence of the plurality of users obtained after the addition to the information sequence.
  • the modulation transmission processing unit the unit is configured such that transmission of single-bit information of a plurality of users, such as transmission of F-ACK or F-PCB information, can be performed simultaneously.
  • the F-ACK information bits are extended by Wals h codel (Walsh code 1), and the F-PCB information bits are passed through Walsh.
  • the related scrambling code is scrambled, and users of different MACIDs can use different scrambling codes to scramble, that is, all the bits of the MACID are used to generate scrambling codes.
  • sequence of information for all users obtained after scrambling is then added, and the added sequence of information is mapped to physical channel resources (such as DRCH or BRCH) within a physical frame.
  • physical channel resources such as DRCH or BRCH
  • the F-ACK channel and the F-PCB channel are extended by the spreading code, that is, the F-ACK and the F-PCB information are expanded, and specifically, the same Walsh code is used to perform the corresponding point multiplication and expansion processing operation;
  • the extended F-ACK and F-PCB information are combined as an I signal and a Q signal (that is, added by the SUM unit);
  • He 1" scrambles the combined signal with the user's MACID scrambling code, and adds the information scrambled by multiple users;
  • the processing such as OFDM modulation, the specific mapping and modulation processing is the same as the processing in FIG. 3; the mapped and modulated signals are transmitted through the antenna.
  • the spreading codes of the F-ACK channel and the F-PCB channel may be the same or different.
  • the spreading code of the F-ACK channel and the F-PCB channel may be an orthogonal code, a random code or an arbitrary code.
  • Channel resource mapping is performed on the added information sequence, mapped onto the physical channel, and subjected to OFDM modulation and the like, and then the corresponding F-ACK and F-PCB information are transmitted through the antenna.
  • the F-ACK information bits are separately transmitted using the solution provided by the embodiment of the present invention, and the corresponding processing process includes:
  • the plurality of bit information is scrambled by using a scrambling code corresponding to the MACID, so that the receiving end can determine the receiving user corresponding to the F-ACK information;
  • the information sequence of each user subjected to the scrambling process is sequentially subjected to addition processing, mapped to a physical channel, and OFDM modulation processing, and the information sequence including the F-ACK information is transmitted through an antenna.
  • the F-PCB information bits are separately transmitted using the solution provided by the embodiment of the present invention, and the corresponding processing process includes:
  • the plurality of bit information is scrambled by using a scrambling code corresponding to the MACID, so that the receiving end can determine the receiving user corresponding to the F-PCB information;
  • the information sequence of each user subjected to the scrambling process is sequentially subjected to addition processing, mapped to a physical channel, and OFDM modulation processing, and the information sequence including the F-PCB information is transmitted through an antenna.
  • the corresponding processing process includes:
  • the F-ACK information bits and the F-PCB information bits are respectively extended, and after the scrambling process, the corresponding information sequences, that is, the F-ACK information sequence and the F-PCB information sequence are obtained;
  • the F-PCB information sequence and the F-ACK information sequence after the addition processing are respectively mapped and mapped to different physical channel resource blocks;
  • the mapped information sequence including F-PCB information and F-ACK information is multiplexed in the same physical frame, and after OFDM modulation, it is transmitted through the antenna.
  • the scrambling code may be generated by a partial bit of the MACID, and accordingly, the extended Walsh code of the same channel (F-A CK channel or F-PCB channel) may be different, for example,
  • the number of bits of the MACID is 9 bits, and the number of available Walsh codes after expansion is 128.
  • the lower 7 bits of the MACID can be mapped to different Walsh codes, that is, users with different MACIDs of 7 different bits are extended by different Walsh codes.
  • the remaining two bits in the MACID generate different scrambling codes, that is, two different users in the MACID are scrambled by different scrambling codes.
  • the specific processing process includes the following processes:
  • each F-ACK information is divided into four groups, and each F-ACK information in each group is extended by a 7-bit Walsh code, and the extended F-ACK information sequence in each group is used. Performing addition to obtain a sequence of F-ACK information corresponding to each group after the addition;
  • each group of corresponding F-ACK information sequences is scrambled by using a scrambling code to obtain a scrambled information sequence
  • the F-ACK and the F-PCB may be distinguished by different Walsh codes, or may be distinguished by different scrambling codes, or may be transmitted through I and Q channels, respectively.
  • Walsh code division can be used to assign Walsh codes of odd and even Walsh codes to F-ACK and F-PCB, respectively.
  • the processing specifically includes: [121] First, the F-ACK information and the F-PCB information are respectively scrambled and expanded using the scrambling code corresponding to the user information, and the multiplexed information sequences of the F-ACK information are respectively added, F-PCB The information sequence after the information expansion is added;
  • the information sequence obtained by adding all the paths corresponding to the F-ACK information is scrambled by the first scrambling code, and the information sequence obtained by adding the one channel corresponding to the F-PCB information is used for the second.
  • the scrambling code is scrambled, and the two scrambled information sequences are added again;
  • the transmission power control of the F-ACK/F-PCB transmission needs to be performed, and the corresponding specific control scheme includes :
  • the F-ACK and/or F-PCB belonging to different mobile terminals to be transmitted by the base station are classified according to channel quality; the corresponding classification manner may be: F-ACK and/or F belonging to different mobile terminals.
  • - PC B sorts according to channel quality, and groups the sorted information in order, and the number of F-ACKs and/or F-PCBs to be sent in each group may be substantially the same or different;
  • the corresponding grouping method can also be: There are 3 kinds of PF (Packet) from the reverse traffic channel.
  • PF Packet
  • PF itself represents different channel quality
  • large PF means good channel quality
  • small PF means poor channel quality
  • F-ACK and / or F-PCB belongs to the terminal
  • Different PFs are classified. That is, the corresponding F-ACK and / or F-PCB selections are divided into different groups according to the PF.
  • each group of mapped physical channel resources Different, specifically by frequency division multiplexing, split multiplexing or frequency division multiplexing multiplexing; for example, F-ACK and / or F-PCB occupy a physical resource of a basic node, but F- ACK/FP
  • the CB is divided into two groups. Therefore, the physical channel resources of one half of the base nodes can be allocated to one of the groups, and the physical channel resources of the remaining half of the base nodes are allocated to another group;
  • the receiver needs to demodulate the corresponding F-ACK and/or F-PCB information according to the received PF information to different groups.
  • the implementation structure of the F-ACK information transmission is as shown in FIG. 11, and the specific processing process includes: [131] First, the four groups of symbols divided by the F-ACK information are scrambled and expanded respectively, wherein the F-ACK1 group contains K1 F-ACK information, and the F-ACK2 group contains K2 F-ACK information, F - The ACK3 group contains K3 F-ACK information, and the F-ACK4 group contains K4 F-ACK information;
  • the scrambled extended information sequences of each group are respectively added, and the added information sequence is adjusted according to the power requirement to be transmitted, and the power adjustment control is specifically performed by the bow I input power capture signal. ;
  • each group of power-adjusted information sequences is multiplexed, mapped, and the like, and the corresponding F-ACK information is transmitted through the antenna.
  • the embodiment of the present invention mainly expands the original F-ACK channel and the F-PCB channel, so that the channel can support both the OFDM service and the CDMA service. And these information bits are transmitted using MACID related orthogonal codes or / and scrambling code spreading and scrambling.
  • the receiving end mobile terminal

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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 permettant de transférer des informations dans un système de communication sans fil. Dans un système de communication MROF comportant simultanément des canaux de service MROFA ET CDMA dans les canaux inverses, les informations à bit unique en attente d'envoi sont étalées et brouillées dans le canal de commande d'envoi avec les informations utilisateur; puis la séquence d'informations obtenue après étalement et brouillage est traitée par modulation MROF; le procédé consiste ensuite à transmettre les informations modulées par le biais de l'antenne. L'invention concerne également un dispositif permettant de transférer des informations dans un système de communication sans fil.
PCT/CN2007/070652 2006-09-08 2007-09-07 Procédé et dispositif permettant de transférer des informations dans un système de communication sans fil Ceased WO2008040209A1 (fr)

Applications Claiming Priority (2)

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CN2006101287907A CN101141179B (zh) 2006-09-08 2006-09-08 在无线通信系统中实现信息传递的方法及装置
CN200610128790.7 2006-09-08

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WO2008040209A1 true WO2008040209A1 (fr) 2008-04-10

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CN101562588B (zh) * 2008-04-18 2012-05-30 财团法人工业技术研究院 无线讯号传送方法及传送器
CN105207745A (zh) * 2015-08-31 2015-12-30 清华大学 一种多址接入信道的多用户编码调制传输方法

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CN1605173A (zh) * 2001-10-18 2005-04-06 高通股份有限公司 频域扩展的多址混合ofdm－cdma系统
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CN101141179A (zh) 2008-03-12

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