WO2010075704A1 - 系统信息传输方法 - Google Patents

系统信息传输方法 Download PDF

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Publication number
WO2010075704A1
WO2010075704A1 PCT/CN2009/074017 CN2009074017W WO2010075704A1 WO 2010075704 A1 WO2010075704 A1 WO 2010075704A1 CN 2009074017 W CN2009074017 W CN 2009074017W WO 2010075704 A1 WO2010075704 A1 WO 2010075704A1
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WO
WIPO (PCT)
Prior art keywords
information
frequency
resource
frequency partition
carrier
Prior art date
Application number
PCT/CN2009/074017
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English (en)
French (fr)
Inventor
关艳峰
刘向宇
刘颖
鲁照华
方惠英
Original Assignee
中兴通讯股份有限公司
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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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/143,179 priority Critical patent/US20110267996A1/en
Priority to EP09835991.2A priority patent/EP2384041B1/en
Publication of WO2010075704A1 publication Critical patent/WO2010075704A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/231Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery

Definitions

  • a base station refers to a device that provides services for a terminal, and communicates with a terminal through an uplink/downlink, where downlink refers to a base station to a terminal transmission link, and uplink refers to a terminal to a base station. Transmission link.
  • a plurality of terminals may simultaneously transmit data to the base station through the uplink, or may simultaneously receive data from the base station through the downlink.
  • a base station implements radio resource scheduling control
  • scheduling allocation of system radio resources is performed by a base station.
  • the base station provides downlink resource allocation information from the base station to the terminal, and uplink resource allocation information from the terminal to the base station.
  • the base station when scheduling a radio resource of an air interface, the base station usually takes one radio frame as a scheduling period, and divides the radio resource into a plurality of radio resource units (for example, one time slot or one codeword). Scheduling, the base station provides data or multimedia services to terminals it covers by scheduling radio resource units.
  • a base station divides radio resources at each frequency point into time segments of 4.615 ms.
  • each radio frame contains 8 time slots, one time slot can transmit a full rate or two half rate channels, and can also achieve fast data service.
  • the data traffic rate is increased to 100 kbps or more by means of a fixed time slot based packet switching;
  • the base station also divides the radio resources of the air interface into wireless with a period of 10 ms. Frame, each 10ms contains 14 regular time slots and 6 special time slots, which are used to transmit specific services and signaling.
  • GSM and TD-SCDMA systems mainly use TDMA or Code Division Multiple Address (CDMA) technology, which is based on time slots and The codeword performs resource mapping and resource allocation, and the process compares the order.
  • CDMA Code Division Multiple Address
  • Orthogonal Frequency Division Multiplexing OFDM
  • OFDMA Orthogonal Frequency Division Multiple Address
  • LTE Long Term Evolution
  • UMB Ultra Mobile Broadband
  • IEEE 802.16m wireless communication systems
  • radio resources are also divided into frames for management, but each OFDM symbol
  • Each includes a plurality of mutually orthogonal subcarriers, and techniques such as Fractional Frequency Reuse (FFR) are used to reduce interference and improve coverage.
  • FFR Fractional Frequency Reuse
  • the available physical subcarriers are divided into physical resource units, and then the physical resource units are mapped into a continuous resource unit (Contiguous Resource Unit, CCU) and a distributed resource unit (Distributed Resource Unit).
  • CCU Contiguous Resource Unit
  • DRU distributed resource unit
  • CRU Contiguous Logical Resource Unit
  • CRU Contiguous Logical Resource Unit
  • CLRU Contiguous Logical Resource Unit
  • the continuous logical resource unit means that the subcarriers are continuous, and the DRU is subcarrier permutation or block permutation.
  • Tile Permutation which becomes a distributed Logical Resource Unit (DLRU), and the distributed resource unit refers to whether the subcarriers are discontinuous or not continuous;
  • the base station needs to support multiple carriers to utilize the dispersed frequency resources, which makes the division of the radio resources more complicated, and finally makes it difficult for the base station to transmit system information and the terminal to resolve the resource allocation information of the base station, thereby determining the reception and transmission of the data.
  • the process of locating physical resources becomes complicated. It can be seen that the system information management and resource allocation methods of the OFDM/OFDMA-based wireless system are different from TDMA and CDMA. Therefore, for the problem that the terminal cannot efficiently know the system information and the base station's mapping to the resource, an effective solution has not been proposed yet.
  • the present invention has been made in view of a problem that a terminal cannot efficiently learn system information and a base station's resource mapping situation in an OFDM/OFDMA-based wireless system.
  • the main object of the present invention is to provide system information in a communication system.
  • a system information transmission method includes: a base station configuring system information, the system information including resource mapping information; and the base station transmitting resource mapping information through a broadcast control channel.
  • the system information further includes at least one of the following: uplink/downlink bandwidth information, multi-carrier information, system compatibility information, control channel information, and multicast broadcast information.
  • the number of bits required to represent some or all of the system information is determined based on the system bandwidth.
  • the uplink/downlink bandwidth information includes at least one of the following: In the TDD mode, the number or proportion of the uplink subframe and the downlink subframe, in the FDD mode, whether each carrier belongs to the uplink carrier or the downlink carrier, in the FDD mode The bandwidth of the downlink carrier and/or the bandwidth of the uplink carrier, and the ratio of the downlink carrier bandwidth to the uplink carrier bandwidth in the FDD mode.
  • the multi-carrier information includes at least one of the following: whether to support indication information of multi-carrier operation, each part configures a duplex mode of the carrier, each part configures a frequency of the carrier, and a bandwidth of each part of the configured carrier, under multi-carrier operation Protect the usage information of subcarriers.
  • the system compatibility information includes at least one of: whether to support the indication information of the compatible system, the resource location information of the compatible system in the downlink, and the resource location information of the compatible system in the uplink, where the compatible system is in the downlink
  • the resource location information of the path includes at least one of the following: a number of subframes occupied by the compatible system, a subframe position occupied by the compatible system, and resource location information of the compatible system in the uplink includes at least one of the following: a total subframe occupied by the compatible system The number of subframes occupied in the TDM mode, the subframe position occupied in the TDM mode, the subframe position occupied in the FDM mode, the proportion occupied in the subframe in the FDM mode, or the number of resource units.
  • the control channel information includes at least one of: a number of streams when the secondary broadcast control channel adopts MIMO transmission, a code rate of the secondary broadcast control channel, a number of subframes of the unicast service control channel interval, and an uplink control channel.
  • the occupied resource location information, where the resource location information occupied by the uplink control channel includes: Ranging channel location information, fast feedback channel location information, HARQ feedback channel location information, bandwidth request channel location information, and location information of the Sounding channel.
  • the multicast broadcast information includes location information of a multicast broadcast and/or cyclic prefix information used by the multicast broadcast, where the location information passes the number of subframes, a subframe label, a frequency partition label, a number of resource units, and a resource unit.
  • the label and the resource unit area identifier indicates that the cyclic prefix information indicates the cyclic prefix length used by the broadcast multicast area by the binary bit index.
  • the method further includes: the base station transmitting at least one of the following information on the broadcast control channel: uplink/downlink bandwidth information, multi-carrier information, compatible system information, control channel information, and multicast broadcast information.
  • the foregoing resource mapping information includes one or a combination of the following: a total number of physical resource units, a subband size, a start band size, a number of frequency partitions, a size of each frequency partition, and a partial frequency reuse factor corresponding to each frequency partition.
  • the subband is composed of a plurality of consecutive physical resource units
  • the foregoing band is composed of one or more consecutive physical resource units.
  • the physical resource units included in the subband and/or the encapsulation are fixed or determined based on system bandwidth and/or channel quality feedback.
  • the number of binary bits representing the frequency partition is fixed or determined according to the system bandwidth.
  • the partial frequency reuse factor corresponding to the frequency partition is represented by one of the following ways: respectively, using 1 to 3 bits to represent a partial frequency reuse factor of each frequency partition; determining part frequency reuse of each frequency partition according to the number of frequency partitions Factor; For some frequency partitions in all frequency partitions, the partial frequency reuse factor is determined independently, and the same frequency reuse factor is used for the remaining frequency partitions in all frequency partitions.
  • the number of subbands in each frequency partition and/or the number of bands in each frequency partition are represented by binary bits.
  • the binary bits comprise 3 to 9 bits, or the number of bits contained in the binary bits is determined according to the system bandwidth.
  • the size of the frequency partition is represented by one of the following ways: represented by the number of resource units included in the frequency partition, where the resource unit is a logical resource unit or a physical resource unit; represented by a frequency partition configuration identifier; Represented by the number of subbands and/or bands included in the partition.
  • the number of distributed resource units in the frequency partition and/or the number of consecutive resource units in the frequency partition are represented by one or a combination of the following manners: Mode 1: indicating a resource in the frequency partition by using a plurality of binary bits
  • Mode 1 indicating a resource in the frequency partition by using a plurality of binary bits
  • the number of subbands of the unit and/or the number of bands and/or the number of resource units represent the number of distributed resource units in the frequency partition, determined by the size of the frequency partition and the number of distributed resource units in the frequency partition.
  • Method 2 indicating the number of consecutive resource units in the frequency partition by indicating the number of sub-bands for the consecutive resource units and/or the number of re-bands and/or the number of resource units in the frequency partition by a plurality of binary bits, Determining the number of distributed resource units in the frequency partition by the size of the frequency partition and the number of consecutive resource units in the frequency partition;
  • Method 3 indicating the configuration mode of the distributed resource unit and the continuous resource unit in the frequency partition by using multiple binary bits ;
  • the resource unit is a logical resource unit or a physical resource unit.
  • the plurality of binary bits comprise 3-8 bits, or the number of bits included in the plurality of binary bits is determined according to the system bandwidth.
  • the sending, by the base station, the resource mapping information by using the broadcast control channel includes: transmitting at least one of the following information by using a broadcast control channel: a number of frequency partitions, a size of each frequency partition, a partial frequency reuse factor of each frequency partition, and a frequency division in each frequency partition.
  • a broadcast control channel a number of frequency partitions, a size of each frequency partition, a partial frequency reuse factor of each frequency partition, and a frequency division in each frequency partition.
  • FIG. 1 is a schematic diagram showing a frame structure of a wireless communication system according to the related art
  • FIG. 2 is a schematic diagram showing a resource structure of a wireless communication system according to the related art
  • FIG. 1 is a schematic diagram showing a frame structure of a wireless communication system according to the related art
  • FIG. 2 is a schematic diagram showing a resource structure of a wireless communication system according to the related art
  • FIG. 1 is a schematic diagram showing a frame structure of a wireless communication system according to the related art
  • FIG. 2 is a schematic diagram showing a resource structure of a wireless communication system according to the related art
  • FIG. 1 is a schematic diagram showing a frame structure of a wireless communication system according to the related art
  • FIG. 2 is a schematic diagram showing a resource structure of a wireless communication system according to the related art
  • FIG. 1 is a schematic diagram showing a frame structure of a wireless communication system according to the related art
  • FIG. 2 is a schematic diagram showing a resource structure of a wireless communication system according
  • 3 is a 5 MHz wireless according to an embodiment of the present invention.
  • Schematic diagram of the resource mapping process of the communication system 4 is a schematic diagram of a resource mapping process of a 10 MHz wireless communication system according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.
  • the present invention provides a system information transmission scheme in a communication system, which is considered to be a problem in the related art, because the terminal cannot know the system information and the base station to the resource mapping situation in the OFDM/OFDMA-based wireless system.
  • the base station configures system information, and the system information includes resource mapping information; the base station sends resource mapping information through the broadcast control channel.
  • the system information in the system configuration information of the base station includes system information determined by the configuration of the base station itself and/or system information forwarded after receiving by the base station.
  • the base station configuration system information includes a base station obtaining a system parameter process and/or a transmission system parameter process.
  • the base station In order to ensure normal communication between the base station and the terminal, the base station must map the physical radio resource into a logical radio resource, for example, mapping the physical subcarrier into a logical resource unit, and the base station implements scheduling of the radio resource by scheduling the logical resource unit.
  • the mapping of radio resources is mainly based on the frame structure and resource structure of the wireless communication system, and the frame structure describes the control structure of the radio resources in the time domain, and the resource structure describes the radio resources in the Control structure in the frequency domain.
  • the frame structure divides the radio resources into different levels of units in the time domain, such as superframes, frames, subframes, and symbols, by setting different control channels, such as a broadcast control channel (Broadcast Control Channel, called BCCH).
  • BCCH Broadcast Control Channel
  • the unicast service control channel (Unicast Service Control Channel, called USCCH) implements scheduling control.
  • the control channel can be referred to as a broadcast channel and a unicast control channel. For example, FIG.
  • FIG. 1 is a schematic diagram of a frame structure of a wireless communication system according to the related art.
  • a radio resource is divided into super frames in a time domain, each super frame includes 4 frames, and each frame includes 8 subframes.
  • the sub-frame is composed of 6 basic OFDM symbols.
  • the actual system determines the frame structure according to factors such as the terminal speed, system bandwidth, the length of the cyclic prefix (Cyclic Prefix) and the uplink and downlink conversion interval.
  • the number of OFDM symbols specifically included in the tier unit sets a broadcast control channel in the first downlink subframe in the superframe to transmit system information.
  • the broadcast control channel is located in the first subhead of the superframe.
  • the broadcast control channel is also called a superframe header (Superframe Header, called SFH), and the broadcast control channel includes a primary broadcast control channel and/or a secondary broadcast control channel, so, equivalently, the superframe header includes Primary superframe header and/or secondary superframe header.
  • Setting the unicast service control channel mainly sends resource scheduling information, so the unicast service control channel is also called a mapping (MAP) channel, including non-user-specific (Non-User-Specific, NUS) information and/or users. Specific (User-Specific, cartridge called US) information.
  • MAP mapping
  • the resource structure divides the available frequency band into multiple frequency partitions in the frequency domain according to factors such as coverage, coverage, system capacity, and transmission rate, and then maps the frequency resources in the frequency partition into continuous resource unit regions and/or Distribution resource unit area.
  • 2 is a schematic diagram of resource structure of a wireless communication system according to the related art. As shown in FIG. 2, physical subcarriers available in a subframe are divided into physical resource units, and then physical resource units are replaced and allocated to three frequency partitions. Each frequency partition can be divided into a continuous resource unit and a distributed resource unit for implementing scheduling flexibility.
  • the terminal needs to demap the logical radio resources back to the physical radio resources according to the resource configuration of the base station, so as to send and receive data in the correct location.
  • the terminal in order to allow the terminal to perform demapping, thereby transmitting and receiving data at the correct location, which system information is transmitted by the base station and how to transmit the system information, and how the terminal according to the system information of the base station and
  • the resource allocation message determines the location of its actual physical resource location and needs to be studied. For the solution of this problem, on the one hand, it is necessary to consider the speed and complexity of the terminal to resolve the physical location of the resource. On the other hand, it also considers the signaling overhead required by the terminal in resolving the physical location of the resource.
  • a system information transmission method in a communication system is provided to ensure that a resource configuration and a mapping situation are notified to a terminal, so that the terminal can correctly parse the wireless resource information.
  • the system information includes resource mapping information
  • the resource mapping information indicates resource configuration and mapping.
  • Resource Mapping Information Specifically, the resource mapping information in the base station configuration resource mapping process is transmitted through a broadcast control channel.
  • the broadcast control channel includes a primary broadcast control channel and/or a secondary broadcast control channel.
  • the foregoing resource mapping information is sent by using a primary broadcast control channel and/or a secondary broadcast control channel.
  • the resource mapping information is carried or set in the system information for transmission. It should be noted that some or all of the information of the resource mapping information may adopt a default setting.
  • the resource mapping information may include but is not limited to one of the following Or a combination thereof: the total number of physical resource units, the number of frequency partitions (Frequency Partitions), the size of the subbands, the size of the start bands, the size of each frequency partition, and the partial frequency reuse factors corresponding to each frequency partition, each The number of subbands in the frequency partition, the number of minibands in each frequency partition, the number of distributed resource units in each frequency partition, and the number of consecutive resource units in each frequency partition.
  • the resource mapping information may include but is not limited to one of the following Or a combination thereof: the total number of physical resource units, the number of frequency partitions (Frequency Partitions), the size of the subbands, the size of the start bands, the size of each frequency partition, and the partial frequency reuse factors corresponding to each frequency partition, each The number of subbands in
  • the subband is composed of a plurality of consecutive physical resource units
  • the enlightenment band is composed of one or more consecutive physical resource units
  • the physical resource units included in the subband and/or the enveloping band are predetermined, or , determined by bandwidth and/or channel quality feedback granularity or mechanism.
  • comprising a subband ⁇ physical resource units, and N 2 ⁇ evident band comprises a physical resource units.
  • the number, the system bandwidth and the number of points of FFT, the position of the broadcast control channel, a physical resource unit, ⁇ ⁇ N 2 or a combination of one of the information has a correspondence relationship. For example, FIG.
  • FIG. 3 is a schematic diagram of a resource mapping process of a 5 MHz wireless communication system according to an embodiment of the present invention.
  • the system bandwidth is 5 MHz
  • the number of fast Fourier transforms is 512
  • Ni 4
  • N 2 1
  • FIG. 4 is a schematic diagram of a resource mapping process of a 10 MHz wireless communication system according to an embodiment of the present invention.
  • the system bandwidth is 10 MHz
  • the number of points of the fast Fourier transform is 1024.
  • the system bandwidth is 20 MHz
  • the number of fast Fourier transforms is 2048
  • at least one of the following information is transmitted through the broadcast channel: the number of frequency partitions, the size of each frequency partition, a partial frequency reuse factor of each frequency partition, and a subband of each frequency partition.
  • Number of Frequency Partitions In the embodiment of the present invention, the number of frequency partitions may be indicated in a binary bit index.
  • the value is incremented by 1 to be the actual number of frequency partitions. For example, when 3 bits, 000 means only 1 frequency partition, and 110 means 7 frequency partitions. Taking the case shown in FIG. 3 to FIG. 4 as an example, since FIG. 3 is three frequency partitions, the number of frequency partitions can be represented as 010, and in FIG. 4, there are four frequency partitions, and the number of frequency partitions can be expressed as 011. Of course, the above is just a representation example, and other methods are also possible. For example, a number of binary bits are used to represent the number of frequency partitions, 00 for 1 frequency partition, 01 for 3 frequency partitions, 10 for 4 frequency partitions, and 11 for 7 frequency partitions.
  • the size of the frequency partition may be represented by one of a subband, an enlightenment or a resource unit or a combination thereof, wherein the resource unit is a logical resource unit or a physical resource unit.
  • the resource unit is a logical resource unit or a physical resource unit.
  • sub-bands and/or 4-band representations are employed. The following four modes are given as examples in the embodiment of the present invention, but the present invention is not limited thereto.
  • Manner 1 The size of the frequency partition is represented by the number of subbands, start bands, or resource units included in the frequency partition, where the resource unit is a logical resource unit or a physical resource unit.
  • the system information is represented as 00111, 00111, 00111.
  • Manner 2 The size of the frequency partition is represented by a frequency partition configuration identifier. In this mode, each identifier represents a specific number of subbands, enable zones, or resource elements included in each frequency partition.
  • mapping resources to three frequency partitions of frequency partition 0 ⁇ 2 you can use 00 to represent 16: 16: 16 and 01 to represent 24: 12: 12.
  • L FP0 16 PRUs in frequency partition 0
  • L FP1 16 PRUs in frequency partition 1
  • L FP2 16 PRUs in frequency partition 2
  • the system information can be expressed as 00.
  • the mapping is performed into four frequency partitions, and the size of each frequency partition is 24, 8, 8, and 8, which can be represented by the frequency partition configuration identifier 011 (or other equivalent identifier).
  • Mode 3 Use the offset of each frequency partition relative to the first frequency partition.
  • 00 represents 16: 16:16
  • it should be expressed as: 00000, 01111, 11111, where the offset of frequency partition 0 is relative to itself, Therefore, its offset information is 00000, which can be omitted, while 01111 is the offset of frequency partition 1 relative to frequency partition 0, and 11111 is the offset of frequency partition 2 relative to frequency partition 0.
  • Manner 4 It is represented by the number of subbands and/or 4 bands included in the frequency partition. For example, as shown in FIG. 3, for a bandwidth of 5 MHz, the size of the frequency partition is represented by a band, with 5 bits, and the number of subbands included is represented by 3 bits.
  • frequency partition 0 contains 1 subband, 4 microstrips, frequency partition 0 is 8 microstrips, denoted as 01000, and the number of subbands included can be represented as 001 by 3 bits; frequency partition 1 contains 1 subband Band, 4 microstrips, frequency partition 1 size is 8 microstrips, denoted as 01000, the number of subbands included can be represented as 001 by 3 bits; frequency partition 2 contains 1 subband, 4 microstrips, frequency partition 2 The size is 8 microstrips, denoted as 01000, and the number of subbands included can be expressed as 001 by 3 bits. It should be noted that the number of bits used to represent the subband and the enable band needs to be determined according to the system bandwidth to reduce the overhead.
  • the partial frequency reuse factor corresponding to the frequency partition may have various representation methods for the partial frequency reuse factor corresponding to the frequency partition.
  • Method 1 Use 1 to 3 bits respectively Partial frequency reuse factor for each frequency partition; for example, 00 indicates that the partial frequency reuse factor is 1, 01 indicates that the partial frequency reuse factor is 2/3, and 10 indicates that the partial frequency reuse factor is 1/3.
  • Manner 2 Determine a partial frequency reuse factor of each frequency partition according to the number of frequency partitions; for example, as shown in FIG. 3, the number of frequency partitions is 3, and the frequency reuse factor of the frequency partition is 1/3. When jt ⁇ , you can not send this information to lower the cost.
  • the partial frequency reuse factor is determined independently, and the same partial frequency reuse factor is used for the remaining frequency partitions in all frequency partitions. For example, as shown in FIG. 4, the number of frequency partitions is 4, the frequency division factor of the frequency partition 0 is 1 , and the frequency reuse factor of the remaining frequency partitions is 1/3.
  • the number of distributed resource units / the number of consecutive resource units may be represented by one or a combination of sub-bands, start-ups, or resource units, where the resource unit is a logical resource unit or a physics Resource unit.
  • the opening band representation is employed.
  • Manner 1 The number of distributed resource units in the frequency partition is indicated by a plurality of binary bits indicating the number of subbands for distributing resource units in the frequency partition and/or the number of bands and/or the number of resource units, and The number of consecutive resource units in the frequency partition is determined by the size of the frequency partition and the number of distributed resource units in the frequency partition (subtracting).
  • Manner 2 indicating the number of consecutive resource elements in the frequency partition and the number of resource elements and/or the number of resource elements in the frequency partition by a plurality of binary bits, indicating the number of consecutive resource units in the frequency partition, the frequency of passing The size of the partition and the number of consecutive resource units in the frequency partition (subtracting) to determine the number of distributed resource units in the frequency partition.
  • a plurality of binary bits may contain 3 to 7 bits, or the number of bits may be determined according to the bandwidth to reduce the cost. For example, as shown in Table 1: Table 1
  • Manner 3 The configuration mode of the distributed resource unit and the continuous resource unit in the frequency partition is indicated by a plurality of binary bits. For example, it is indicated by 1 bit whether all subbands in the frequency partition are mapped to consecutive resource units, and all bands are mapped to distributed resource units, for example, 1 is YES, 0 is YES, and when the bit is 0, This is further indicated by the number of distributed resource units in Table 1 or Table 2. Of course, you can add more bits to indicate more special configurations. Based on the above description, embodiments of the present invention are further described below in conjunction with FIG. For example, as shown in FIG.
  • N Sb is the total number of subbands
  • N Mb is the total number of microstrips
  • L FPi is the number of resource elements in frequency partition i
  • L FPi , Sb are subbands in frequency partition i
  • the number, L FPi , Mb is the number of bands in frequency partition i
  • N FPi , CRU is the number of CRUs in frequency partition i
  • N FPi , DRU is the number of CRUs in frequency partition i, where 0 ⁇ i ⁇ 3, These values can be indicated by the value of the binary bit, or other methods can be used.
  • N Sb , N Mb , L FPi , N FPi , Sb , N FPi , Mb , N F Pi ; C Ru and N FPi , DRU such information are redundant, such as N FPi , CRU and N FPi .
  • N F Pi When the unit of DRU is ⁇ Kai, N F Pi ; sb+N 2 * N 2 * (N FPi , CRU + N FPi , DRU ), so you can only send them Part of the information, and extrapolation of other information, thereby reducing overhead. Portions in the resource mapping information can be further reduced in overhead with a default configuration.
  • the default 3 frequency partitions can be equal in size, and the last 3 frequency partitions in the 4 frequency partitions are equal.
  • the number of bits required to represent some or all of the system information can be determined based on the system bandwidth. For example, the number of bits required to represent the number of frequency partitions, the number of bits required to represent the number of frequency partitions, the number of binary bits required to represent the size of the frequency partition, the number of binary bits required to represent the number of subbands in the frequency partition, etc., can be based on the bandwidth. determine. As shown in Table 3: Table 3
  • the terminal can be informed of the base station's configuration or division of resources.
  • the system information may further include one or more of the following information, for example, uplink/downlink bandwidth information, multi-carrier information, compatible system information, control channel information, multicast broadcast information, and the like.
  • the multi-carrier information, the compatible system information, the control channel information, and the multicast broadcast information may be sent on the secondary broadcast control channel.
  • the superframe sequence number is also sent in the primary broadcast channel, and the system information in the primary broadcast channel should be verified by using an 8 or 16 bit CRC; the secondary broadcast channel also transmits the sector ID, and the system in the secondary broadcast channel The information is calibrated using an 8 or 16 bit CRC.
  • the uplink/downlink bandwidth information uplink/downlink bandwidth information includes at least one of the following: in the time division duplex (TdD) mode, the number or proportion of uplink subframes and downlink subframes; In the FDD mode, the bandwidth of the downlink carrier and/or the bandwidth of the uplink carrier in the FDD mode, the downlink carrier bandwidth and the uplink in the FDD mode. The ratio of carrier bandwidth.
  • TDD time division duplex
  • the uplink and downlink are time-division multiplexed (Time Division Multiplex)
  • the TDM method occupies resources on the same carrier frequency.
  • the uplink and downlink channels occupy resources on multiple carrier frequencies in a frequency division multiplexing (Frequency Division Multiplex).
  • Frequency Division Multiplex For example, in the TDD mode, the ratio of the subframes occupied by the downlink/uplink is indicated by 2 bits. For example, 00 means 3: 5, 01 means 4: 4, 10 means 5: 3, and 11 means 6: 2. Of course, more combinations can be represented by increasing the number of bits.
  • the binary bit bitmap indicates whether each carrier is an uplink carrier or a downlink carrier.
  • the multi-carrier information multi-carrier information specifically includes one or more of the following information: whether to support the indication information of the multi-carrier operation, each part configures a duplex mode of the carrier, each part configures a frequency of the carrier, and a bandwidth of each part of the configured carrier, Information on the use of guard subcarriers under multi-carrier operation. For example, 1 bit is used to indicate whether to support the indication of multi-carrier operation, 1 means support,
  • 0 means not supported; 1 to 2 bits are used to indicate the duplex mode of the partially configured carrier, 00 means TDD, 01 means FDD, 10 means frequency division duplex mode (Half-Frequency Division Duplex, called HFDD), 11 means All part of the configured carriers adopt the same duplex mode or the same duplex mode as the corresponding fully configured carrier, or 11 as reserved; partially configure carrier frequency, bandwidth, and information used to protect subcarriers under multi-carrier operation. Indicated by means of a binary bit index, or by system bandwidth.
  • 000 means 5MHz
  • 001 means 10MHz
  • 010 means 20MHz
  • 011 means 7MHz
  • 100 means 7MHz
  • 100 means 8.75MHz
  • 101 means 10MHz bandwidth is divided into 2 5MHz
  • 110 means 20MHz bandwidth is divided into 2 5MHz and 1 10MHz
  • 111 means 20MHz bandwidth Divided into two 10MHz or represents 10MHz or 20MHz bandwidth is not divided into multiple carriers.
  • the multi-carrier information indicates configuration information of the fully configured carrier and the partially configured carrier, and usage information of the inter-carrier protection subcarrier, including the number of guard subcarriers used as data subcarriers, and the like.
  • the multi-carrier signal may indicate attributes of other carriers, including system bandwidth, frequency points, system configuration information like single carrier, etc.
  • the usage of the protection sub-carrier may be indicated by the number of resource units formed by transmitting the protection sub-carriers, or by System bandwidth indication, for example, 20MHz system is divided into 2
  • the intermediate protection subcarriers are taken out to form two physical resource units, that is, the protection subcarriers on the right side of the first 10 MHz carrier form one physical resource unit, and the protection subcarriers on the left side of the second 10 MHz carrier constitute one.
  • Physical resource unit One bit is used to indicate whether a certain carrier is a fully configured carrier or a partially configured carrier.
  • System Compatible Information System Compatible information refers to information sent to the previous generation system in the same series of standards in order to continue to support the previous generation system in the evolution system of the next generation system.
  • an IEEE 802.16m system is compatible with information transmitted by an IEEE 802.16e system
  • an IEEE 802.16 system is a compatible system.
  • the system compatibility information includes one or more of the following information: whether the indication information of the compatible system is supported, the resource location information of the compatible system in the downlink, and the resource location information of the compatible system in the uplink.
  • the resource location information of the compatible system in the downlink includes at least one of the following: a number of subframes occupied by the compatible system, and a subframe position occupied by the compatible system; and the resource location information of the compatible system in the uplink includes at least one of the following: The total number of subframes occupied by the compatible system, compatible system
  • 1 bit can be used to indicate whether a compatible system is supported, 1 means support, 0 means no support; 1 ⁇ 3 bits are used to indicate the number and/or position of the subframe occupied by the downlink compatible system, for example, 01 means that the compatible system occupies the downlink.
  • the number of subframes occupied by the uplink compatible system is represented by 1 to 3 bits.
  • 01 indicates that the compatible system occupies the first and second subframes of the uplink.
  • 01 indicates that TDM is used in subframe 0 and FDM is used in subframe 1.
  • Control channel information includes but is not limited to: secondary broadcast control channel using multiple input multiple output
  • the number of streams, the code rate of the secondary broadcast control channel, the location information of the unicast control channel, and the location information includes at least two unicast service control channel intervals.
  • the number of subframes n the resource location occupied by the uplink control channel.
  • the resource location information occupied by the uplink control channel includes: Ranging channel location information, fast feedback channel location information, and hybrid automatic repeat request (Hybrid Automatic Repeat Request, The cartridge is called HARQ) feedback channel location information, bandwidth request channel location information, and location information of the Sounding channel.
  • the number of subframes n between the two unicast service control channels can be represented by 1 or 2 bits.
  • the unicast service control channel may appear once every one subframe, and may be indicated by a 1-bit 0.
  • the resource location of the uplink control channel may be indicated by one or a combination of a subframe label, a frequency partition label, a logical resource unit number, a logical resource unit label, and a logical resource unit region identifier.
  • the code rate of the secondary broadcast control channel is related to the modulation mode, coding efficiency, and number of repetitions of the secondary broadcast control channel. Therefore, when other factors such as the coding mode and the coding efficiency are determined, the code rate of the broadcast channel is affected only by the number of repetitions.
  • the multicast broadcast multicast information includes location information of the multicast broadcast and/or cyclic prefix information used by the multicast broadcast, wherein the location information may be through a number of subframes, a subframe number, a frequency partition number, a number of resource units, One or a combination of the resource unit label and the resource unit area identifier indicates that the cyclic prefix information indicates the cyclic prefix length used by the broadcast multicast region by the binary bit index.
  • the logical resource units 000 to 111 in the subframe 2 are defined as a multicast broadcast area, or the frequency partition 3 in the subframe 3 is a multicast broadcast area or a resource area defined by a subframe number and a logical resource number is indicated. Broadcast the broadcast area.
  • the length of the CP used in the multicast broadcast area may be indicated by one of the following methods: by using a 1-bit indication, indicating whether to use a long CP or a short CP, or by using 2 bits to indicate which CP length to use, for example, 1/4, 1 /8, 1/16, etc., or, through terminal detection. It should be pointed out that in some cases, the above information may have some redundancy, so in order to reduce the overhead, only part of the information may be transmitted.
  • N 48 in Figure 4 may not be sent. It is indicated by the system bandwidth. The total number of subbands is 12 or not. It can also be obtained by system bandwidth and subband size.
  • Resource Allocation Information For a terminal, in order to determine the physical location of its receiving and/or transmitting resources, resource allocation information is required in addition to system information. Specifically, the resource allocation information includes location indication information of the radio resource, and the indication information includes at least one of the following: a subframe number, a sequence number of the logical resource unit, a deviation from the determined resource location, an identifier of the logical resource region, and the like. For example, the starting position of a resource allocation is a certain position, and the length relative to the starting position is both a deviation.
  • the terminal can determine the position of the broadcast control channel according to the system bandwidth information and the multi-carrier information, decode the broadcast control channel and the channel that carries the resource allocation information, and control the broadcast from the broadcast control channel.
  • Other system information is obtained in the channel, including resource mapping information, and resource allocation information is obtained from a channel carrying resource allocation information.
  • the logical resource indicated by the location indication information of the radio resource in the resource allocation information is mapped to the physical resource by an inverse resource mapping process (or referred to as a reverse mapping) according to the resource mapping information. For example, as shown in FIG.
  • the terminal first decodes the primary broadcast control channel in the broadcast control channel, and then decodes the secondary broadcast control channel, thereby obtaining resource mapping information, and then decoding the unicast service control channel, and then decoding the resource allocation information, thereby obtaining The location of the physical resource that receives/sends data.
  • the terminal by configuring the resource mapping information, the terminal can learn the configuration, mapping, and/or division of the resource by the base station, and determine the location of the receiving/transmitting resource by using the resource mapping information, thereby improving the radio resource. Scheduling efficiency and reduced system overhead.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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Description

系统信息传输方法
技术领域 本发明涉及通信领域, 具体地, 涉及系统信息传输方法。 背景技术 在无线通信系统中, 基站是指为终端提供服务的设备, 其通过上 /下行 链路与终端进行通信, 其中, 下行是指基站到终端的传输链路, 而上行是指 终端到基站的传输链路。 多个终端可以通过上行链路同时向基站发送数据, 也可以通过下行链路同时从基站接收数据。 在采用基站实现无线资源调度控 制的无线通信系统中, 系统无线资源的调度分配由基站完成。 例如, 由基站 给出基站到终端的下行资源分配信息以及终端到基站的上行资源分配信息 等。 在已商用的无线通信系统中, 基站在调度空口的无线资源时, 通常以一 个无线帧为一个调度周期, 并将无线资源分成若干个无线资源单元 (例如, 一个时隙或一个码字) 进行调度, 基站通过调度无线资源单元向其覆盖的终 端提供数据或多媒体服务。 例如, 在第二代无线通信系统中, 例如, 在全球 移动通信系统 ( Global System for Mobile communication, 筒称为 GSM ) 中, 基站将每个频点上的无线资源分成以 4.615ms 为周期的时分多址 (Time Division Multiple Address, 筒称为 TDMA ) 无线帧 , 每个无线帧包含 8个时 隙, 一个时隙可以传送一个全速率或两个半速率的话路, 也可以实现氏速的 数据业务; 在 2.5代无线通信系统中, 例如, 在通用无线分组服务(General Packet Radio Service , 筒称为 GPRS ) 中 , 通过 1入基于固定时隙的分组交换 将数据业务速率提高到 100kbps以上; 而在第三代无线通信系统中, 例如, 在时分同步码分多址 ( Time-Division Synchronous Code Division Multiple Address , 筒称为 TD-SCDMA ) 中 , 基站同样将空口的无线资源分成以 10ms 为周期的无线帧, 每个 10ms包含 14个常规时隙和 6个特殊时隙, 常规时隙 用于传输具体的业务和信令, 在每个常规时隙上, 基站通过不同的码字来区 分用户。 通过上文可以看出 , GSM和 TD-SCDMA系统主要采用 TDMA或码分 多址( Code Division Multiple Address , 筒称为 CDMA )技术 , 其基于时隙和 码字进行资源映射和资源分配, 过程比较筒单。 但是, 在基于正交频分复用 ( Orthogonal Frequency Division Multiplexing, 筒称为 OFDM )和正交频分多 址 ( Orthogonal Frequency Division Multiple Address , 筒称为 OFDMA ) 技术 的系统中, 例如, 在长期演进(Long Term Evolution, 筒称为 LTE )、 超移动 宽带 ( Ultra Mobile Broadband, 筒称为 UMB ) 和 IEEE 802.16m等无线通信 系统中, 无线资源虽然也被划分成帧来管理, 但每个 OFDM符号都包含多个 相互正交的子载波, 采用部分频率复用 (Fractional Frequency Reuse, 筒称为 FFR )等技术来降低干扰, 提高覆盖; 其次, 无线通信的信道环境变化频繁, 基站为了获得频率分集增益和频率选择性调度增益, 将可用物理子载波划分 成物理资源单元, 进而 夺物理资源单元映射为连续资源单元 ( Contiguous Resource Unit, 筒称为 CRU ) 和分布资源单元 ( Distributed Resource Unit, 筒称为 DRU ), 以提高传输性能, 其中, CRU经过直接映射后, 则称为连续 的還辑资源单元(Contiguous Logical Resource Unit, 筒称为 CLRU ), 连续的 逻辑资源单元指其中的子载波都是连续的, 而 DRU 经过子载波置换 ( Subcarrier Permutation ) 或块置换 ( Tile Permutation ), 则成为分布的還辑 资源单元( Distributed Logical Resource Unit, 筒称为 DLRU ), 分布的還辑资 源单元指其中的子载波是不连续或不都是连续的; 此外, 频率资源稀少, 基 站需要支持多载波, 以利用分散的频率资源, 这使得无线资源的划分情况更 加复杂, 最终导致基站传输系统信息、 终端解析基站的资源分配信息变得困 难, 从而确定其接收和发送数据的物理资源位置的过程变得复杂。 可见, 基于 OFDM/OFDMA的无线系统的系统信息管理和资源分配方 法与 TDMA和 CDMA不同。 因此, 针对终端无法高效地获知系统信息和基 站对资源映射情况的问题, 目前尚未提出有效的解决方案。 发明内容 针对基于 OFDM/OFDMA的无线系统中终端无法高效地获知系统信息 和基站对资源映射情况的问题而做出本发明 , 为此, 本发明的主要目的在于 提供一种通信系统中的系统信息传输方案,用以解决相关技术中的上述问题。 为达到上述目的, 根据本发明的一个方面, 提供了一种系统信息传输方 法。 根据本发明的系统信息传输方法包括: 基站配置系统信息, 系统信息包 含资源映射信息; 基站通过广播控制信道发送资源映射信息。 优选地, 上述系统信息还包括以下至少之一: 上行 /下行带宽信息、 多 载波信息、 系统兼容信息、 控制信道信息、 多播广播信息。 优选地 , 才艮据系统带宽确定表示部分或全部系统信息所需要的比特数。 优选地, 上述上行 /下行带宽信息包括以下至少之一: 在 TDD方式下, 上行子帧和下行子帧的数量或比例、 在 FDD 方式下, 各载波属于上行载波 还是下行载波、 在 FDD方式下, 下行载波的带宽和 /或上行载波的带宽、 在 FDD方式下, 下行载波带宽和上行载波带宽的比例。 优选地, 上述多载波信息包括以下至少之一: 是否支持多载波操作的指 示信息, 各部分配置载波的双工模式, 各部分配置载波的频点、 各部分配置 载波的带宽, 多载波操作下保护子载波的使用信息。 优选地, 上述系统兼容信息包括如下至少之一: 是否支持兼容系统的指 示信息、 兼容系统在下行链路的资源位置信息、 兼容系统在上行链路的资源 位置信息 , 其中, 兼容系统在下行链路的资源位置信息包括如下至少之一: 兼容系统占据的子帧数量、 兼容系统占据的子帧位置, 兼容系统在上行链路 的资源位置信息包括如下至少之一: 兼容系统占据的总子帧数, TDM方式下 占据的子帧数量、 TDM方式下占据的子帧位置、 FDM方式下占据的子帧位 置、 FDM方式下在子帧中占据的比例或资源单元数量。 优选地, 上述控制信道信息包括如下至少之一: 辅广播控制信道在采用 MIMO传输时的流的数目, 辅广播控制信道的码率, 单播服务控制信道间隔 的子帧数 n, 上行控制信道占据的资源位置信息, 其中, 上行控制信道占据 的资源位置信息包括: Ranging信道位置信息、快速反馈信道位置信息、 HARQ 反馈信道位置信息、 带宽请求信道位置信息、 Sounding信道的位置信息。 优选地, 上述多播广播信息包括多播广播的位置信息和 /或多播广播使 用的循环前缀信息, 其中, 位置信息通过子帧数目、 子帧标号、 频率分区标 号、 资源单元数目、 资源单元标号和资源单元区域标识中的其中之一或其组 合来指示, 循环前缀信息通过二进制比特索引来指示广播多播区域使用的循 环前缀长度。 优选地, 该方法还包括: 基站在广播控制信道发送如下信息至少之一: 上行 /下行带宽信息、 多载波信息, 兼容系统信息、 控制信道信息、 多播广播 信息。 优选地, 上述资源映射信息包括以下之一或其组合: 物理资源单元的总 数、 子带大小、 啟带大小、 频率分区的数目、 各频率分区的大小、 各频率分 区对应的部分频率复用因子、 各频率分区中子带的数目、 各频率分区中啟带 的数目、 各频率分区中分布资源单元的数目、 各频率分区中连续资源单元的 数目。 优选地, 上述子带由多个连续的物理资源单元组成, 上述 ^啟带由一个或 多个连续的物理资源单元组成。 优选地, 子带和 /或啟带包含的物理资源单元是固定的, 或者, 才艮据系 统带宽和 /或信道质量反馈确定。 优选地,表示频率分区的二进制比特的数目是固定的或者根据系统带宽 确定。 优选地, 通过如下方式之一表示频率分区对应的部分频率复用因子: 分 别使用 1 ~ 3 比特表示各频率分区的部分频率复用因子; 根据频率分区的数 目确定各频率分区的部分频率复用因子; 对于所有频率分区中的部分频率分 区, 独立确定其部分频率复用因子, 对于所有频率分区中的其余频率分区, 采用相同的频率复用因子。 优选地, 通过二进制比特表示各频率分区中子带的数目和 /或各频率分 区中 ^啟带的数目。 优选地, 二进制比特包含 3 ~ 9个比特, 或者, 二进制比特包含的比特 数才艮据系统带宽确定。 优选地, 通过如下方式之一表示频率分区的大小: 通过频率分区中包含 的资源单元的数目来表示, 其中, 资源单元为逻辑资源单元或物理资源单元; 通过频率分区配置标识来表示; 通过频率分区中包含的子带和 /或啟带的数目 来表示。 优选地,通过如下方式之一或组合来表示频率分区中的分布资源单元的 数目和 /或频率分区中的连续资源单元的数目: 方式一: 通过多个二进制比特 指示频率分区中用于分布资源单元的子带的数目和 /或 ^啟带的数目和 /或资源 单元的数目来表示频率分区中分布式资源单元的数目 , 通过频率分区的大小 和频率分区中的分布资源单元的数目来确定频率分区中的连续资源单元的数 目; 方式二: 通过多个二进制比特指示频率分区中用于连续资源单元的子带 的数目和 /或^啟带的数目和 /或资源单元的数目来表示频率分区中连续资源单 元的数目 , 通过频率分区的大小和频率分区中的连续资源单元的数目来确定 频率分区中的分布资源单元的数目; 方式三: 通过多个二进制比特指示频率 分区中分布式资源单元和连续资源单元的配置模式; 其中, 资源单元为逻辑 资源单元或物理资源单元。 优选地 , 多个二进制比特包含 3 ~ 8个比特, 或者, 多个二进制比特包 含的比特数才艮据系统带宽确定。 优选地 , 资源映射信息的部分或全部采用缺省设置。 优选地,基站通过广播控制信道发送资源映射信息包括: 通过广播控制 信道发送如下信息至少之一: 频率分区的数目、 各频率分区的大小、 各频率 分区的部分频率复用因子、 各频率分区中子带的数目、 各频率分区中 ^啟带的 数目、 各频率分区中分布资源单元的数目、 各频率分区中连续资源单元的数 。 借助于本发明, 通过配置并发送系统信息和资源分配信息, 使终端可以 获知基站对资源的配置、 映射和 /或分配情况, 从而提高了无线资源的调度效 率, 降低了系统开销。 本发明的其它特征和优点将在随后的说明书中阐述, 并且, 部分地从说 明书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实 现和获得。 附图说明 附图用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与本 发明的实施例一起用于解释本发明 , 并不构成对本发明的限制。 在附图中: 图 1是才艮据相关技术的无线通信系统的帧结构示意图; 图 2是才艮据相关技术的无线通信系统的资源结构示意图; 图 3是根据本发明实施例的 5MHz无线通信系统的资源映射过程的示意 图; 图 4是才艮据本发明实施例的 10MHz无线通信系统的资源映射过程的示 意图。 具体实施方式 需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中的特 征可以相互组合。 下面将参考附图并结合实施例来详细说明本发明。 功能相克述 考虑到相关技术中存在的由于基于 OFDM/OFDMA的无线系统中终端 无法获知系统信息和基站对资源映射情况的问题, 本发明实施例提供了一种 通信系统中的系统信息传输方案 , 该方案处理原则如下:基站配置系统信息 , 系统信息包含资源映射信息; 基站通过广播控制信道发送资源映射信息。 需要说明的是:基站配置系统信息中的系统信息包括基站本身配置决定 的系统信息和 /或基站收到后转发的系统信息。基站配置系统信息包括基站得 到系统参数过程和 /或发送系统参数过程。 为了保障基站与终端之间的正常通信,基站必须将物理的无线资源映射 为逻辑的无线资源, 例如, 将物理子载波映射为逻辑资源单元, 基站通过调 度逻辑资源单元实现无线资源的调度。对于基于 OFDM/OFDMA的无线通信 系统,其无线资源的映射的主要是依据该无线通信系统的帧结构和资源结构, 帧结构描述无线资源在时域上的控制结构, 资源结构描述了无线资源在频域 上的控制结构。 帧结构将无线资源在时域上划分为不同等级的单位, 如超帧、 帧、 子帧 和符号进行调度, 通过设置不同的控制信道, 如广播控制信道 ( Broadcast Control Channel, 筒称为 BCCH )、单播月 务控制信道 ( Unicast Service Control Channel, 筒称为 USCCH ) 等实现调度控制, 在下文中, 可以将控制信道筒 称为广播信道和单播控制信道。 例如, 图 1是根据相关技术的无线通信系统 的帧结构示意图, 如图 1所示, 无线资源在时域上划分为超帧, 每个超帧包 含 4个帧 , 每个帧包含 8个子帧 , 子帧由 6个基本的 OFDM符号组成 , 实际 的系统根据需要支持的终端速度、 系统带宽、 循环前缀( Cyclic Prefix, 筒称 为 CP )的长度和上下行转换间隔等因素确定帧结构中各个等级单位中具体包 含的 OFDM符号数, 在超帧中的第一个下行子帧内设置广播控制信道, 来发 送系统信息。 另夕卜, 如图 1所示, 广播控制信道位于超帧中头部的第一个子 帧, 所以广播控制信道也被称作超帧头 ( SuperFrame Header, 筒称为 SFH ) , 广播控制信道包括主广播控制信道和 /或辅广播控制信道, 所以, 等价地说, 超帧头包括主超帧头和 /或辅超帧头。设置单播服务控制信道主要发送资源调 度信息, 所以, 单播服务控制信道也被称作映射(MAP )信道, 包括非用户 特定(Non-User-Specific, 筒称为 NUS )信息和 /或用户特定( User-Specific, 筒称为 US ) 信息。 资源结构在频域上根据需要支持的覆盖范围、 覆盖率、 系统容量和传输速率等因素将可用的频带分成多个频率分区 , 进而将频率分 区内的频率资源映射为连续资源单元区域和 /或分布资源单元区域。 图 2是才艮 据相关技术的无线通信系统的资源结构示意图, 如图 2所示, 子帧内可用物 理子载波被分成物理资源单元, 再对物理资源单元进行置换后分配到 3个频 率分区, 每个频率分区可以分为连续资源单元和分布资源单元, 用于实现调 度的灵活性。 而终端需要才艮据基站的资源配置, 将逻辑的无线资源反映射回 物理的无线资源上, 从而在正确的位置发送和接收数据。 因此, 在 OFDM/OFDMA的无线系统中, 为了让终端进行反映射, 从 而在正确的位置发送和接收数据, 对于基站发送哪些系统信息和如何发送这 些系统信息 , 以及终端如何根据基站的系统信息和资源分配消息确定其实际 的物理资源位置这一问题, 需要研究。 对于这一问题的解决, 一方面, 要考 虑终端解析资源物理位置的速度和复杂性, 另一方面, 还要考虑终端在解析 资源物理位置时需要的信令开销。 根据本发明实施例, 提供了一种通信系统中的系统信息传输方法, 以确 保将资源配置和映射情况告知终端 , 从而使得终端能够正确解析无线资源信 息。 在本发明实施例中, 系统信息包含资源映射信息, 资源映射信息表示了 资源配置和映射情况。 资源映射信息 具体地,基站配置资源映射过程中的资源映射信息是通过广播控制信道 发送的。 需要说明的是, 广播控制信道包括主广播控制信道和 /或辅广播控制 信道, 优选地, 在本发明实施例中, 上述的资源映射信息通过主广播控制信 道和 /或辅广播控制信道来发送, 例如, 将资源映射信息携带或设置在系统信 息中进行发送。 需要说明的是, 资源映射信息的部分或全部信息, 可以采用 缺省设置。 优选地, 在本发明实施例中, 资源映射信息可以包括但不限于以下之一 或其组合: 物理资源单元的总数、 频率分区(Frequency Partition, 筒称为 FP ) 的数目、 子带大小、 啟带大小、 各频率分区的大小、 各频率分区对应的部分 频率复用因子、 各频率分区中子带 (Subband ) 的数目、 各频率分区中啟带 ( Miniband ) 的数目、 各频率分区中分布资源单元的数目、 各频率分区中连 续资源单元的数目。 在上述信息中, 子带由多个连续的物理资源单元组成, 啟带由一个或多 个连续的物理资源单元组成, 并且, 子带和 /或^啟带包含的物理资源单元预先 确定,或者, 由带宽和 /或信道质量反馈粒度或机制决定。在本发明实施例中, 子带包含^^个物理资源单元, 而^啟带包含 N2个物理资源单元。 具体地, 系 统带宽与快速傅立叶变换的点数、 广播控制信道的位置、 物理资源单元的数 目、 Ν^ N2中的信息之一或组合具有对应关系。 例如, 图 3是根据本发明 实施例的 5MHz无线通信系统的资源映射过程的示意图, 如图 3所示 , 系统 带宽为 5MHz , 快速傅立叶变换的点数为 512 , 物理资源单元总数为 N=24 , Ni = 4 , N2 = 1 , 图 4是才艮据本发明实施例的 10MHz无线通信系统的资源映 射过程的示意图, 如图 4所示, 系统带宽为 10MHz , 快速傅立叶变换的点数 为 1024 , 物理资源单元总数为 N=48 , Ni = 4 , N2 = l。 而对于 20MHz无线 通信系统, 系统带宽为 20MHz , 快速傅立叶变换的点数为 2048 , 物理资源 单元总数为 N=96 , 可取 ^^ = 8 , N2 = 2。 另夕卜, 对于上述的各个信息的发送, 通过广播信道发送如下信息至少之 一: 频率分区的数目、 各频率分区的大小、 各频率分区的部分频率复用因子、 各频率分区中子带的数目、 各频率分区中微带的数目、 各频率分区中分布资 源单元的数目、 各频率分区中连续资源单元的数目。 频率分区的数目 在本发明实施例中, 对于频率分区的数目, 可以以二进制比特索引的方 式指示。 例如, 使用 2〜3比特的二进制值来表示, 该值加 1即为实际的频率 分区数目, 例如, 3比特时, 000表示只有 1个频率分区, 110表示 7个频率 分区。 以图 3-图 4所示的情况为例, 由于图 3是 3个频率分区, 则频率分区 的数目可以表示为 010 , 而图 4中有 4个频率分区, 则频率分区的数目可以 表示为 011。 当然, 以上只是给出了一种表示实例而已, 也可以采用其他方 式。 例如, 使用若干二进制比特表示频率分区数目, 00表示 1个频率分区, 01表示 3个频率分区, 10表示 4个频率分区, 11表示 7个频率分区。 频率分区的大小 频率分区的大小可以通过子带、 啟带或资源单元之一或者是其组合表 示, 其中, 资源单元为逻辑资源单元或物理资源单元。 优选地采用子带和 / 或 4啟带来表示。 本发明实施例中给出了以下四种方式作为实例, 但是本发明不限于此。 方式一: 通过频率分区中包含的子带、 ^啟带或资源单元的数目来表示频 率分区的大小, 其中, 资源单元为逻辑资源单元或物理资源单元。 例如,基站广播系统信息中的频率分区所包含 PRU的数目,对于 5MHz 系统而言, 有 24个 PRU, 即 N=24, 各个频率分区用 4或 5位二进制比特表 示, 例如, 如图 3所示, 对于有 3个频率分区, 分别是频率分区 0~2的情况, 1设频率分区 0中 LFPO=8个 PRU , 频率分区 1中 LFP1=8个 PRU, 频率分区 2中 LFP2=8个 PRU, 则该系统信息表示为 00111 , 00111 , 00111。 方式二: 通过频率分区配置标识来表示频率分区的大小, 在该方式下, 每个标识表示各个频率分区中包含的子带、 ^啟带或资源单元的特定数量。 例如, 10MHz系统中有 48个 PRU, 即 N=48 , 在将资源映射为频率分 区 0~2的 3个频率分区时, 可以用 00表示 16: 16: 16 , 01表示 24: 12: 12 , 10 表示 12:24: 12, 11表示 12: 12:24。 例如, 基于以上内容, 支设频率分区 0中 LFP0=16个 PRU, 频率分区 1 中 LFP1=16个 PRU, 频率分区 2中 LFP2=16个 PRU, 则该系统信息可以表示为 00。 而如图 4所示, 映射为 4个频率分区, 各个频率分区中大小为别为 24, 8 , 8和 8 , 可以用频率分区配置标识 011 (或 其它等价标识)表示。 可见, 该方法中配置标识本身并不直接等于频率分区 的实际的大小, 而是指示了实际大小与配置标识之间的一种对应关系 , 类似 方法不再赘述。 方式三:使用每个频率分区相对于第一个频率分区的偏置来表示。例如, 在上述方式 2中, 00表示 16: 16: 16 , 而如果按照方式 3的表式方法, 则应表 示为: 00000, 01111 , 11111 , 其中, 频率分区 0的偏移量相对于自身, 因此, 它的偏移量信息为 00000 , 可省略, 而 01111则是频率分区 1相对于频率分 区 0的偏置, 11111是频率分区 2相对于频率分区 0的偏置。 方式四: 通过频率分区中包含的子带和 /或 4啟带的数目来表示。 例如,如图 3所示,对于 5MHz的带宽,频率分区的大小通过 ^啟带表示, 用 5个比特, 而包含的子带数目用 3个比特表示。 因此, 频率分区 0中包含 1个子带, 4个微带, 频率分区 0大小为 8个微带, 表示为 01000 , 包含的子 带数目用 3个比特可表示为 001 ; 频率分区 1 包含 1个子带, 4个微带, 频 率分区 1大小为 8个微带, 表示为 01000, 包含的子带数目用 3个比特可表 示为 001 ; 频率分区 2包含 1个子带, 4个微带, 频率分区 2大小为 8个微 带, 表示为 01000, 包含的子带数目可用 3个比特表示为 001。 需要说明的 是, 用以表示子带和 ^啟带的比特数需要根据系统带宽确定, 以降低开销。 频率分区对应的部分频率复用因子 对于频率分区对应的部分频率复用因子, 其表示方法可以有多种, 以下 示例性地给出了几种表示方式: 方式一: 分别使用 1 ~ 3比特表示各频率分区的部分频率复用因子; 例 如, 00表示部分频率复用因子为 1 , 01表示部分频率复用因子为 2/3 , 10表 示部分频率复用因子为 1/3。 方式二: 根据频率分区的数目确定各频率分区的部分频率复用因子; 例 如, 如图 3所示,频率分区数目为 3 , 则频率分区的部分频率复用因子为 1/3。 jt匕时, 可以不发送这个信息, 以降氏开销。 方式三: 对于所有频率分区中的部分频率分区, 独立确定其部分频率复 用因子, 对于所有频率分区中的其余频率分区, 采用相同的部分频率复用因 子。 例如, 如图 4所示, 频率分区数目为 4, 频率分区 0部分频率复用因子 为 1 , 其余频率分区的部分频率复用因子为 1/3。
分布资源单元的数目 /连续资源单元的数目 分布资源单元的数目、 连续资源单元的数目可以通过子带、 啟带或资源 单元之一或者是其组合表示, 其中, 资源单元为逻辑资源单元或物理资源单 元。 优选地采用啟带表示。 下面给出了几种示例性的表示方式。 方式一:通过多个二进制比特指示频率分区中用于分布资源单元的子带 的数目和 /或^啟带的数目和 /或资源单元的数目来表示频率分区中分布式资源 单元的数目,并通过频率分区的大小和频率分区中的分布资源单元的数目(进 行减法运算) 来确定频率分区中的连续资源单元的数目。 方式二:通过多个二进制比特指示频率分区中用于连续资源单元的子带 的数目和 /或^啟带的数目和 /或资源单元的数目来表示频率分区中连续资源单 元的数目, 通过频率分区的大小和频率分区中的连续资源单元的数目 (进行 减法运算) 来确定频率分区中的分布资源单元的数目。 这里多个二进制比特 可以包含 3 ~ 7 个比特, 也可以才艮据带宽确定比特数以降氏开销。 例如, 如 表 1所示: 表 1
Figure imgf000013_0002
可以结合如下方式, 进一步降氏开销。 方式三:通过多个二进制比特指示频率分区中分布式资源单元和连续资 源单元的配置模式。 例如, 通过 1个比特指示是否将该频率分区中的所有子 带映射为连续资源单元, 所有 带映射为分布资源单元, 例如, 用 1表示是, 0表示不是, 在该比特为 0时, 再通过表 1或表 2中的分布资源单元的数目 进一步指示。 当然, 可以增加到多个比特指示更多的特殊配置。 基于以上描述, 以下结合图 4来进一步描述本发明实施例。 例如, 如图 4所示, NSb为总的子带数目, NMb为总的微带数目 , LFPi为频率分区 i中资 源单元的数目, LFPi,Sb为频率分区 i中的子带的数目, LFPi,Mb为频率分区 i中 啟带的数目 , NFPi,CRU为频率分区 i中的 CRU的数目 , NFPi,DRU为频率分区 i 中 CRU的数目, 其中, 0 < i < 3 , 这些数值均可以用二进制比特的数值指示, 也可以采用其它方式。 需要说明, NSb、 NMb、 LFPi,、 NFPi,Sb、 NFPi,Mb、 NFPi;CRu 和 NFPi,DRU, 这些信息存在冗余, 比如 NFPi,CRU和 NFPi,DRU的单位为^啟带时,
Figure imgf000013_0001
NFPi;sb+N2* N2* (NFPi,CRU + NFPi,DRU) ,所以可以仅发送其中的 部分信息, 并推算出其它信息, 从而降低开销。 资源映射信息中的部分可以 采用默认配置进一步降低开销。 例如对于 3个或 4个频率分区时, 可以默认 3个频率分区的大小相等、 4个频率分区中的后 3个频率分区相等。 对于表示部分或全部系统信息所需要的比特数,可以才艮据系统带宽来确 定。 例如, 表示频率分区数目所需二进制比特数, 表示频率分区数目所需的 比特数、 表示频率分区大小所需二进制比特数、 表示频率分区中子带数目所 需二进制比特数等, 都可以根据带宽确定。 如表 3所示: 表 3
Figure imgf000014_0001
通过上述处理, 即可让终端获知基站对资源配置或划分情况。 除了上述 的资源映射信息,在系统信息中还可以包括如下信息中的一种或多种, 例如, 上行 /下行带宽信息、 多载波信息、 兼容系统信息、 控制信道信息、 多播广播 信息等。 其中, 多载波信息、 兼容系统信息、 控制信道信息、 多播广播信息 可以在辅广播控制信道发送。 另外, 优选地, 主广播信道中还发送超帧序号, 并且主广播信道中的系统信息应该采用 8或 16比特 CRC进行校验; 辅广播 信道还发送扇区 ID ,并且辅广播信道中的系统信息采用 8或 16比特 CRC进 行校 -险。 通过告知终端上述信息, 可以让终端后续对逻辑资源对应的实际物 理位置进行解析。 上行 /下行带宽信息 上行 /下行带宽信息包括以下至少之一: 在时分双工 (Time Division Duplex, 筒称为 TDD )方式下, 上行子帧和下行子帧的数量或比例; 在频分 双工方式( Frequency Division Duple , 筒称为 FDD )方式下, 各载波属于上 行载波还是下行载波, 在 FDD方式下, 下行载波的带宽和 /或上行载波的带 宽; 在 FDD方式下, 下行载波带宽和上行载波带宽的比例。 其中, TDD方 式下, 上行链路与下行链路以时分复用 (Time Division Multiplex, 筒称为 TDM )方式占用同一个载频上的资源, FDD方式下, 上行链路与下行链路以 频分复用 (Frequency Division Multiplex, 筒称为 FDM ) 方式占用多个载频 上的资源。 例如: TDD方式下, 通过 2个比特指示下行 /上行占用的子帧的比例。 例如, 00表示 3 : 5 , 01表示 4: 4, 10表示 5 : 3 , 11表示 6: 2。 当然可以 通过增加比特数来表示更多的组合。 例如: FDD 方式下, 通过二进制比特位图表示各个载波是上行载波还 是下行载波。 例如, 3个载波带宽分别是 5MHz、 5MHz和 10MHz, 则用 101 表示第一个 5MHz的载波和 10MHz的载波为下行载波, 而第二个 5MHz的 载波为上行载波。 多载波信息 多载波信息具体包括以下信息中的一个或多个:是否支持多载波操作的 指示信息, 各部分配置载波的双工模式, 各部分配置载波的频点、 各部分配 置载波的带宽, 多载波操作下保护子载波的使用信息。 例如, 用 1比特来表示是否支持多载波操作的指示信息 , 1表示支持 ,
0表示不支持; 用 1 ~ 2比特来表示部分配置载波的双工模式, 00表示 TDD, 01表示 FDD, 10表示频分双工方式 ( Half-Frequency Division Duplex, 筒称 为 HFDD ), 11 表示所有部分配置载波采用相同的双工模式或者与对应的全 配置载波相同的双工模式, 或者 11 作为保留 (Reserved ); 部分配置载波频 点、 带宽、 多载波操作下保护子载波使用的信息可以用二进制比特索引的方 式指示, 或者通过系统带宽确定。 例如, 000表示 5MHz, 001表示 10MHz, 010表示 20MHz, 011表示 7MHz, 100表示 8.75MHz, 而 101表示 10MHz 带宽分成 2个 5MHz, 110表示 20MHz带宽分成 2个 5MHz和 1个 10MHz, 111表示 20MHz带宽分成 2个 10MHz或者表示 10MHz或 20MHz带宽不分 成多个载波。 多载波信息指示了全配置载波和部分配置载波的配置信息、以及载波间 保护子载波的使用信息 , 包括作为数据子载波使用的保护子载波的数目等。 例如, 多载波信可以指示其它载波的属性, 包括系统带宽、 频点、 类似单载 波的系统配置信息等, 保护子载波的使用情况可以通过发送保护子载波构成 的资源单元数目来指示, 或由系统带宽指示, 例如, 20MHz 系统分成 2 个 10MHz 系统时, 取出中间的保护子载波组成 2 个物理资源单元, 即第一个 10MHz载波右侧的保护子载波组成 1个物理资源单元, 第二个 10MHz载波 左侧的保护子载波组成 1个物理资源单元。 用 1比特来表示某个载波是全配 置载波还是部分配置载波, 例如, 1表示全配置载波, 0表示部分配置载波。 系统兼容信息 系统兼容信息是指同一系列标准中,为了在下一代系统的演进系统中继 续支持前一代系统而向前一代系统发送的信息。 例如, IEEE 802.16m系统要 兼容 IEEE 802.16e系统而发送的信息, IEEE 802.16系统即为兼容系统。 系统兼容信息包括以下信息中的一个或多个:是否支持兼容系统的指示 信息, 兼容系统在下行链路的资源位置信息、 兼容系统在上行链路的资源位 置信息。 其中, 兼容系统在下行链路的资源位置信息包括如下至少之一: 兼 容系统占据的子帧数量、 兼容系统占据的子帧位置; 兼容系统在上行链路的 资源位置信息包括如下至少之一: 兼容系统占据的总子帧数, 兼容系统在
TDM方式下占据的子帧数量、 兼容系统在 TDM方式下占据的子帧位置、 兼 容系统在 FDM方式下占据的子帧位置、兼容系统在 FDM方式下在子帧中占 据的比例或资源单元数量。 例如, 可以用 1比特来表示是否支持兼容系统, 1表示支持, 0表示不 支持; 用 1 ~ 3 比特表示下行兼容系统占据的子帧数量和 /或位置, 例如, 用 01表示兼容系统占据下行的子帧 0和子帧 1。 用 1 ~ 3比特表示上行兼容系 统占据的子帧数, 例如, 用 01 表示兼容系统占据上行的第一个和第二个子 帧。 用 2比特来指示上行兼容系统的方式, 即, 是 FDM还是 TDM, 如 01 表示在子帧 0为 TDM方式, 在子帧 1为 FDM方式。 用 3 ~ 7比特来表示上 行 FDM模式时占据的带宽或资源单元数目、 比例或偏移量。 控制信道信息 控制信道信息包括但不限于: 辅广播控制信道在采用多输入多输出
( Multiple Input Multiple Output, 筒称为 MIMO )模式传输时的流的数目 , 辅广播控制信道的码率, 单播 务控制信道的位置信息, 其位置信息至少包 括两个单播服务控制信道间隔的子帧数 n, 上行控制信道占据的资源位置。 其中, 上行控制信道占据的资源位置信息包括: Ranging 信道位置信息、 快 速反馈信道位置信息、 混合自动重传请求 ( Hybrid Automatic Repeat Request, 筒称为 HARQ )反馈信道位置信息、 带宽请求信道位置信息、 Sounding信道 的位置信息。 例如, 可以用 1或 2比特来表示两个单播服务控制信道相距的 子帧数 n, 具体地, 用 0表示相距 1个子帧, 用 1表示相距 2个子帧, 如图 1所示, 如果单播服务控制信道每 1个子帧出现 1次, 则用 1比特的 0指示 即可。 对于上行控制信道的资源位置, 可以用子帧标号、 频率分区标号、 逻 辑资源单元数目、 逻辑资源单元标号和逻辑资源单元区域标识中之一或组合 来指示。 此外, 辅广播控制信道的码率与辅广播控制信道的调制方式、 编码 效率和重复次数有关, 所以在编码方式和编码效率等其它因素确定时, 广播 信道的码率仅受重复次数影响的条件下, 辅广播控制信道码率通过重复次数 指示或代替。 多播广 ^言息 多播广播信息包括多播广播的位置信息和 /或多播广播使用的循环前缀 信息, 其中, 位置信息可以通过子帧数目、 子帧标号、 频率分区标号、 资源 单元数目、 资源单元标号和资源单元区域标识中之一或组合来指示, 循环前 缀信息通过二进制比特索引来指示广播多播区域使用的循环前缀长度。例如, 子帧 2中的逻辑资源单元 000 ~ 111定义为多播广播区域, 或者, 子帧 3中的 频率分区 3为多播广播区域或者通过子帧序号、 逻辑资源序号定义的资源区 域指示多播广播区域。 多播广播区域使用的 CP长度可以通过如下方法之一 指示: 通过 1比特指示, 指示使用长 CP还是短 CP, 或者, 可以通过 2比特 来指示使用哪种 CP长度, 例如, 1/4, 1/8 , 1/16等, 或者, 通过终端检测得 到。 需要指出, 在某些情况下, 上述信息会存在一定冗余, 因此, 为了降低 开销, 可以只发送其中的部分信息。 例如, 图 4中的 N = 48可以不发, 它由 系统带宽指示, 子带总数为 12 也可以不发, 它同样可以通过系统带宽和子 带大小获得。 资源分配信息 对于终端而言, 为了确定其接收和 /或发送资源的物理位置, 除了需要 系统信息, 还需要资源分配信息。 具体地, 资源分配信息包含无线资源的位 置指示信息, 指示信息至少包括如下之一: 子帧序号、 逻辑资源单元的序号、 相对于确定资源位置的偏差、 逻辑资源区域的标识等。 例如, 资源分配的起 始位置就是一种确定位置, 而相对于起始位置的长度既是一种偏差。 在基站通过广播控制信道将系统信息发送给终端后, 对于终端而言, 其 可以根据系统带宽信息、 多载波信息确定广播控制信道位置, 解码广播控制 信道和承载资源分配信息的信道, 从广播控制信道中获得其它系统信息, 包 括资源映射信息, 从承载资源分配信息的信道获得资源分配信息。 之后, 根 据资源映射信息将资源分配信息中无线资源的位置指示信息指示的逻辑资源 通过逆资源映射过程 (或者称为反映射) 映射到物理资源上。 例如, 如图 1 所示, 终端首先解码广播控制信道中的主广播控制信道, 再解码辅广播控制 信道, 从而获得资源映射信息, 之后解码单播服务控制信道, 再解码资源分 配信息 , 从而获得接收 /发送数据的物理资源位置。 本发明的上述实施例, 通过配置资源映射信息, 可以使得终端获知基站 对资源的配置、 映射和 /或划分情况, 并且结合资源映射信息来确定其接收 / 发送资源的位置, 从而提高了无线资源的调度效率, 并且降低了系统开销。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 或 者将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软 件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的^^申和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种系统信息传输方法, 其特征在于, 包括:
基站配置系统信息, 所述系统信息包含资源映射信息; 所述基站通过广播控制信道发送所述资源映射信息。
2. 根据权利要求 1所述的方法, 其特征在于, 所述系统信息还包括以下至 少之一: 上行 /下行带宽信息、 多载波信息、 系统兼容信息、 控制信道信 息、 多播广播信息。
3. 根据权利要求 1或 2所述的方法, 其特征在于, 根据系统带宽确定表示 部分或全部所述系统信息所需要的比特数。
4. 根据权利要求 2所述的方法, 其特征在于, 所述上行 /下行带宽信息包括 以下至少之一: 在 TDD方式下, 上行子帧和下行子帧的数量或比例、 在 FDD方式下, 各载波属于上行载波还是下行载波、 在 FDD方式下, 下 行载波的带宽和 /或上行载波的带宽、 在 FDD方式下, 下行载波带宽和 上行载波带宽的比例。
5. 根据权利要求 2所述的方法, 其特征在于, 多载波信息包括以下至少之 一: 是否支持多载波操作的指示信息, 各部分配置载波的双工模式, 各 部分配置载波的频点、 各部分配置载波的带宽, 多载波操作下保护子载 波的使用信息。
6. 根据权利要求 2所述的方法, 其特征在于, 所述系统兼容信息包括如下 至少之一: 是否支持兼容系统的指示信息、 兼容系统在下行链路的资源 位置信息、 兼容系统在上行链路的资源位置信息, 其中, 所述兼容系统 在下行链路的资源位置信息包括如下至少之一: 兼容系统占据的子帧数 量、 兼容系统占据的子帧位置, 所述兼容系统在上行链路的资源位置信 息包括如下至少之一: 兼容系统占据的总子帧数, TDM方式下占据的子 帧数量、 TDM方式下占据的子帧位置、 FDM方式下占据的子帧位置、 FDM方式下在子帧中占据的比例或资源单元数量。
7. 根据权利要求 2所述的方法, 其特征在于, 所述控制信道信息包括如下 至少之一: 辅广播控制信道在采用 MIMO传输时的流的数目 , 辅广播控 制信道的码率, 单播服务控制信道间隔的子帧数 n, 上行控制信道占据 的资源位置信息, 其中, 所述上行控制信道占据的资源位置信息包括: Ranging信道位置信息、 快速反馈信道位置信息、 HARQ反馈信道位置 信息、 带宽请求信道位置信息、 So皿 ding信道的位置信息。
8. 根据权利要求 2所述的方法, 其特征在于, 所述多播广播信息包括多播 广播的位置信息和 /或多播广播使用的循环前缀信息, 其中, 所述位置信 息通过子帧数目、 子帧标号、 频率分区标号、 资源单元数目、 资源单元 标号和资源单元区域标识中的其中之一或其组合来指示, 所述循环前缀 信息通过二进制比特索引来指示广播多播区域使用的循环前缀长度。
9. 根据权利要求 2至 7中任一项所述的方法, 其特征在于, 所述方法还包 括:
所述基站在所述广播控制信道发送如下信息至少之一: 所述上行 / 下行带宽信息、 所述多载波信息, 所述兼容系统信息、 所述控制信道信 息、 所述多播广播信息。
10. 根据权利要求 1所述的方法, 其特征在于, 所述资源映射信息包括以下 之一或其组合: 物理资源单元的总数、 子带大小、 啟带大小、 频率分区 的数目、 各频率分区的大小、 各频率分区对应的部分频率复用因子、 各 频率分区中子带的数目、 各频率分区中 4啟带的数目、 各频率分区中分布 资源单元的数目、 各频率分区中连续资源单元的数目。
11. 根据权利要求 10所述的方法, 其特征在于, 所述子带由多个连续的物理 资源单元组成 , 所述啟带由一个或多个连续的物理资源单元组成。
12. 4艮据权利要求 10 所述的方法, 其特征在于, 所述子带和 /或所述 ^啟带包 含的物理资源单元是固定的, 或者, 才艮据系统带宽和 /或信道质量反馈确 定。
13. 根据权利要求 10所述的方法, 其特征在于, 表示所述频率分区的二进制 比特的数目是固定的或者才艮据系统带宽确定。
14. 根据权利要求 3或 10所述的方法, 其特征在于, 通过如下方式之一表示 所述频率分区对应的部分频率复用因子: 分别使用 1 ~ 3比特表示各频率分区的部分频率复用因子; 才艮据所述频率分区的数目确定各频率分区的部分频率复用因子; 对于所有频率分区中的部分频率分区 ,独立确定其部分频率复用因 子, 对于所有频率分区中的其余频率分区, 采用相同的频率复用因子。
15. 根据权利要求 10所述的方法, 其特征在于, 通过二进制比特表示各频率 分区中子带的数目和 /或各频率分区中微带的数目。
16. 根据权利要求 3或 15所述的方法,其特征在于 ,所述二进制比特包含 3 ~ 9个比特, 或者, 所述二进制比特包含的比特数才艮据系统带宽确定。
17. 根据权利要求 10所述的方法, 其特征在于, 通过如下方式之一表示所述 频率分区的大小:
通过频率分区中包含的资源单元的数目来表示, 其中, 所述资源单 元为逻辑资源单元或物理资源单元;
通过频率分区配置标识来表示;
通过频率分区中包含的子带和 /或啟带的数目来表示。
18. 根据权利要求 10所述的方法, 其特征在于, 通过如下方式之一或组合来 表示所述频率分区中的分布资源单元的数目和 /或所述频率分区中的连 续资源单元的数目:
方式一:通过多个二进制比特指示频率分区中用于分布资源单元的 子带的数目和 /或^啟带的数目和 /或资源单元的数目来表示频率分区中分 布式资源单元的数目 , 通过频率分区的大小和频率分区中的分布资源单 元的数目来确定频率分区中的连续资源单元的数目;
方式二:通过多个二进制比特指示频率分区中用于连续资源单元的 子带的数目和 /或^啟带的数目和 /或资源单元的数目来表示频率分区中连 续资源单元的数目 , 通过频率分区的大小和频率分区中的连续资源单元 的数目来确定频率分区中的分布资源单元的数目;
方式三:通过多个二进制比特指示频率分区中分布式资源单元和连 续资源单元的配置模式;
其中, 所述资源单元为逻辑资源单元或物理资源单元。
19. 根据权利要求 3或 18所述的方法 , 其特征在于, 所述多个二进制比特包 含 3 ~ 8个比特, 或者, 所述多个二进制比特包含的比特数根据系统带宽 确定。
20. 才艮据权利要求 1或 10所述的方法, 其特征在于 , 所述资源映射信息的部 分或全部采用缺省设置。
21. 根据权利要求 10所述的方法, 其特征在于, 所述基站通过广播控制信道 发送所述资源映射信息包括:
通过广播控制信道发送如下信息至少之一: 所述频率分区的数目、 所述各频率分区的大小、 所述各频率分区的部分频率复用因子、 所述各 频率分区中子带的数目、 所述各频率分区中啟带的数目、 所述各频率分 区中分布资源单元的数目、 所述各频率分区中连续资源单元的数目。
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