WO2016082706A1 - 数据传输方法和设备 - Google Patents

数据传输方法和设备 Download PDF

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Publication number
WO2016082706A1
WO2016082706A1 PCT/CN2015/094924 CN2015094924W WO2016082706A1 WO 2016082706 A1 WO2016082706 A1 WO 2016082706A1 CN 2015094924 W CN2015094924 W CN 2015094924W WO 2016082706 A1 WO2016082706 A1 WO 2016082706A1
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subframe
tbs
length
protocol
block size
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PCT/CN2015/094924
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English (en)
French (fr)
Inventor
张屹
唐臻飞
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method and device.
  • Multimedia Broadcast Multicast Service is a service that provides the same data to multiple users at the same time.
  • the MBMS service is transmitted by means of broadcast or multicast, thereby realizing resource sharing of the network (including the core network and the access network), and realizing as many multimedia users as possible and having the same requirements with as few resources as possible.
  • the MBMS Single Frequency Network (MBSFN) transmission mode requires all cells in a certain area to transmit the same data packet using the same modulation and coding mode at the same time and frequency.
  • LTE Long Term Evolution
  • EMBMS Enhanced Multimedia Broadcast/Multicast Service
  • DC-MBMS MBMS
  • MC-MBMS hybrid carrier MBMS
  • the subframe length of the LTE system is 1 ms (milliseconds).
  • the frame structure is as shown in Figure 1.
  • Each subframe consists of 2 slots, each slot has 6 symbols, the subcarrier spacing is 15 kHz, and the Cyclic Prefix (CP) length.
  • the MBSFN reference signal is transmitted on the resource element (Resource Element, RE) in the shaded portion of the figure.
  • RE Resource Element
  • the frame structure is shown in Figure 2.
  • Each subframe consists of 2 slots, each with 3 symbols, the subcarrier spacing is 7.5 kHz, and the CP length is 33.3 ⁇ s.
  • the MBSFN reference signal is transmitted on the RE of the shaded portion.
  • the existing LTE MBMS/eMBMS system only supports 15 kHz and 7.5 kHz subcarrier spacing, and the CP length is only 16.6 ⁇ s or 33.3 ⁇ s. If the MBMS/eMBMS technology is introduced in the scenario of TV broadcast and cellular convergence, the MBMS/eMBMS technology is required to support a larger station spacing, but the CP length of the existing frame structure limits the performance of the MBSFN in the large station spacing scenario. In a variety of station spacing scenarios, spectral efficiency is reduced due to frame structure limitations in existing MBMS/eMBMS systems.
  • the embodiment of the invention discloses a data transmission method and device, which solves the problem of reducing the spectrum efficiency in the scenario of multiple station spacings due to the frame structure limitation in the existing MBMS/eMBMS system.
  • a network device includes:
  • a first determining module configured to use at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or according to a moving speed feature of the MBSFN area and a station spacing of the cell in the MBSFN area At least one piece of information determining a subframe for data transmission for a user equipment in the MBSFN area;
  • a sending module configured to notify, to the user equipment in the MBSFN area, information related to a frame structure of the subframe.
  • the first determining module is specifically configured to:
  • the subframe determined for the user equipment in the MBSFN area is a subframe of the MBSFN defined by the 3GPP Release 12 protocol;
  • the moving speed characteristic of the MBSFN area is non-high speed moving, and the maximum radius of the cell in the MBSFN area is less than or equal to a set radius threshold, it is used in the MBSFN area.
  • the subframe determined by the user equipment is a subframe whose length is greater than 1 ms and whose CP length is less than the set threshold; or
  • the subframe determined for the user equipment in the MBSFN area is a subframe having a length greater than 1 ms and a CP length less than a set threshold;
  • the frame is a subframe whose length is greater than 1 ms and whose CP length is greater than or equal to the set threshold.
  • the sending module is specifically configured to:
  • Information related to the frame structure of the subframe is notified to the user equipment in the MBSFN area by the MIB message transmitted in the MBSFN cell.
  • the information related to the frame structure of the subframe determined by the first determining module includes: length information of the CP and a symbol in the subframe. At least one of the number of pieces, the length information of the subframe, and the subcarrier spacing information of the subframe.
  • the subframe that is longer than 1 ms includes a subframe with a length of 2 ms, a subframe with a length of 4 ms, and a length of 5 ms.
  • the subframe that is 2 ms in length includes 2 or 3 symbols, where the subframe corresponds to the transmission
  • the pilot pattern of the reference signal is:
  • REs of two adjacent reference signals on the same symbol are separated by 3 or 7 subcarriers in the frequency domain, or REs of adjacent two reference signals on different symbols are separated by 1 or 3 subbands in the frequency domain. Carrier.
  • the frame structure of the subframe of length 2 ms is:
  • the subcarrier spacing is 1.875 kHz and the CP length is 133.3 ⁇ s; or
  • the subcarrier spacing is 1.25 kHz and the CP length is 200 ⁇ s.
  • the subframe having a length of 4 ms includes 4, 5, or 6 symbols; wherein the subframe corresponds to The pilot pattern used to transmit the reference signal is:
  • the REs of two adjacent reference signals on the same symbol are separated by 3 or 7 subcarrier subcarriers in the frequency domain, or the REs of adjacent two reference signals on different symbols are separated by 1 in the frequency domain or 3 subcarriers.
  • the frame structure of the subframe having a length of 4 ms is:
  • the subcarrier spacing is 1.5 kHz and the CP length is 133.3 ⁇ s; or
  • the subcarrier spacing is 1.875 kHz and the CP length is 133.3 ⁇ s; or
  • the subcarrier spacing is 1.25 kHz and the CP length is 200 ⁇ s.
  • the subframe having a length of 5 ms includes 5, 6 or 8 symbols; wherein the subframe corresponds to The pilot pattern used to transmit the reference signal is:
  • REs of two adjacent reference signals on the same symbol are separated by 3, 7, 15, or 23 subcarriers in the frequency domain, or REs of adjacent two reference signals on different symbols are in the frequency domain.
  • One or three or eleven subcarriers are spaced apart.
  • the frame structure of the subframe having a length of 5 ms is:
  • the subcarrier spacing is 1.25 kHz and the CP length is 33.3 ⁇ s; or
  • the subcarrier spacing is 1.5 kHz and the CP length is 166.67 ⁇ s; or
  • the subcarrier spacing is 1.875 kHz and the CP length is 91.67 ⁇ s; or
  • the subcarrier spacing is 1.25 kHz and the CP length is 200 ⁇ s.
  • the network device further includes: a second determining module
  • the second determining module is configured to: determine a TBS value corresponding to each of the symbols according to a transport block size mapping table that is defined in a 3GPP Release 12 protocol; and the sending module is further configured to: according to each Sending data to the user equipment by using a TBS value corresponding to the symbol;
  • the second determining module is configured to determine, for a subframe having a length of 2 ms, a transport block size mapping table that represents a mapping relationship between a TBS value TBS_L1 and a TBS_L2 of a single layer transmission defined in the 3GPP Release 12 protocol.
  • the TBS value corresponding to the frame; the sending module is further configured to: send data to the user equipment according to the TBS value corresponding to each subframe;
  • the second determining module is configured to determine, for a subframe having a length of 4 ms, a transport block size mapping table that represents a mapping relationship between a TBS value TBS_L1 and a TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol.
  • the TBS value corresponding to the frame; the sending module is further configured to: send data to the user equipment according to the TBS value corresponding to each subframe;
  • the second determining module is configured to: for a subframe having a length of 5 ms, according to a mapping relationship between TBS values TBS_L1 and TBS_L4 indicating a single layer transmission defined in the 3GPP Release 12 protocol a transport block size mapping table, or an extended transport block size mapping table indicating a mapping relationship between TBS_L1 and TBS_L4, determining a TBS value corresponding to each subframe; the sending module is further configured to: according to each subframe A TBS value that sends data to the user equipment.
  • the second determining module is configured according to a TBS value TBS_L1 and TBS_L4 indicating a single layer transmission defined in the 3GPP Release 12 protocol.
  • the transport block size mapping table of the mapping relationship or the transport block size mapping table of the four-layer transmission defined in the 3GPP Release 12 protocol determines the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 5 is taken as the first intermediate value;
  • the transport block size mapping table representing the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and has a minimum difference from the first intermediate value.
  • TBS_L4 determined as the TBS value corresponding to the subframe;
  • TBS_L4 that is less than or equal to the first intermediate value and has the smallest difference from the first intermediate value, Determine the TBS value corresponding to the subframe.
  • the second determining module is configured according to a TBS value TBS_L1 and TBS_L4 indicating a single layer transmission defined in the 3GPP Release 12 protocol.
  • the transport block size mapping table of the mapping relationship or the transport block size mapping table of the four-layer transmission defined in the 3GPP Release 12 protocol determines the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 6 is taken as the second intermediate value;
  • the second intermediate value is greater than 375448, determine the second intermediate value as a TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the second intermediate value and is opposite to the second intermediate
  • the TBS_L4 with the smallest value difference is determined as the TBS value corresponding to the subframe
  • TBS_L4 that is less than or equal to the second intermediate value and has the smallest difference from the second intermediate value, Determine the TBS value corresponding to the subframe.
  • the second aspect is a user equipment, where the user equipment includes:
  • a receiving module configured to receive, by the network device, information related to a frame structure of a subframe used for data transmission
  • a first processing module configured to determine, according to information related to a frame structure received by the receiving module, a subframe that is determined by the network device as a user equipment in an MBSFN area;
  • the subframe is the network device according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area and the MBSFN area. At least one of the station spacings of the cells is determined.
  • the subframe determined by the first processing module is:
  • the receiving module is specifically configured to:
  • Information related to a frame structure of a subframe for data transmission transmitted by the network device is received through an MIB message transmitted in an MBSFN cell.
  • the information related to the frame structure of the subframe used for data transmission includes: length information of the CP and the number of symbols in the subframe At least one piece of information, length information of a subframe, and subcarrier spacing information of a subframe.
  • the subframe having a length greater than 1 ms includes a subframe having a length of 2 ms, a subframe having a length of 4 ms, and a length of 5 ms.
  • the user equipment further includes: a second processing module
  • the second processing module is configured to: determine a transport block size TBS value corresponding to each of the symbols according to a transport block size mapping table that is defined in the 3GPP Release 12 protocol; and the receiving module is further configured to: Receiving data sent by the network device according to a TBS value corresponding to each of the symbols;
  • the second processing module is configured to: for a subframe having a length of 2 ms, a transport block size mapping according to a mapping relationship between a TBS value TBS_L1 of a single layer transmission and a TBS value TBS_L2 of a dual layer transmission defined in the 3GPP Release 12 protocol. a table, the TBS value corresponding to each subframe is determined; the receiving module is further configured to: receive data sent by the network device according to a TBS value corresponding to each subframe;
  • the second processing module is configured to: for a subframe having a length of 4 ms, a transport block size mapping according to a mapping relationship between a TBS value TBS_L1 of a single layer transmission and a TBS value TBS_L4 of a fourth layer transmission defined in the 3GPP Release 12 protocol. a table, the TBS value corresponding to each subframe is determined; the receiving module is further configured to: receive data sent by the network device according to a TBS value corresponding to each subframe;
  • the second processing module is configured to: for a subframe having a length of 5 ms, a transport block size mapping according to a mapping relationship between a TBS value TBS_L1 of a single layer transmission and a TBS value TBS_L4 of a fourth layer transmission defined in the 3GPP Release 12 protocol. a table, or an extended transport block size mapping table indicating a mapping relationship between TBS_L1 and TBS_L4, determining a TBS value corresponding to each subframe; the receiving module is further configured to: receive according to a TBS value corresponding to each subframe The data sent by the network device.
  • the second processing module is configured according to the TBS value TBS_L1 indicating the single layer transmission and the TBS transmitted by the fourth layer, which are defined in the 3GPP Release 12 protocol.
  • the transport block size mapping table of the mapping relationship between the values TBS_L4 or the transport block size mapping table of the four-layer transmission defined in the 3GPP Release 12 protocol determines the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 5 is taken as the first intermediate value;
  • the transport block size mapping table representing the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and has a minimum difference from the first intermediate value.
  • TBS_L4 determined as the TBS value corresponding to the subframe;
  • TBS_L4 that is less than or equal to the first intermediate value and has the smallest difference from the first intermediate value, Determine the TBS value corresponding to the subframe.
  • the second processing module is configured according to the TBS value TBS_L1 indicating the single layer transmission and the TBS transmitted by the fourth layer, which are defined in the 3GPP Release 12 protocol.
  • the transport block size mapping table of the mapping relationship between the values TBS_L4 or the transport block size mapping table of the four-layer transmission defined in the 3GPP Release 12 protocol determines the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 6 is taken as the second intermediate value;
  • the second intermediate value is greater than 375448, determine the second intermediate value as a TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the second intermediate value and is opposite to the second intermediate
  • the TBS_L4 with the smallest value difference is determined as the TBS value corresponding to the subframe
  • TBS_L4 that is less than or equal to the second intermediate value and has the smallest difference from the second intermediate value, Determine the TBS value corresponding to the subframe.
  • a third aspect is a data transmission method, the method comprising:
  • a fourth aspect is a data transmission method, the method comprising:
  • the subframe is the network device according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area and the MBSFN area. At least one of the station spacings of the cells is determined.
  • a network device includes:
  • a processor configured to: according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or according to a moving speed feature of the MBSFN area and the At least one of the station spacings of the cells in the MBSFN area determines a subframe for data transmission for the user equipment in the MBSFN area;
  • a transmitter configured to notify, to the user equipment in the MBSFN area, information related to a frame structure of the subframe.
  • a user equipment includes:
  • a receiver configured to receive frame structure information sent by the network device
  • a processor configured to determine, according to frame structure information received by the receiver, a subframe that is determined by the network device as a user equipment in an MBSFN area for data transmission;
  • the subframe is the network device according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area and the MBSFN area. At least one of the station spacings of the cells is determined.
  • the network device according to at least one of a moving speed feature of the MBSFN area and a radius of the cell in the MBSFN area, or a moving speed feature according to the MBSFN area and the MBSFN At least one of the station spacings of the cells in the area determines a subframe for data transmission for the user equipment in the MBSFN area, which improves flexibility and spectral efficiency of subframe selection.
  • FIG. 1 is a schematic diagram of an MC-MBMS frame structure in an LTE system
  • FIG. 2 is a schematic diagram of a DC-MBMS frame structure in an LTE system
  • FIG. 3 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • 4A-4D are schematic diagrams of pilot patterns of a subframe having a length of 2 ms according to an embodiment of the present disclosure
  • 5A-5C are schematic diagrams of pilot patterns of a subframe having a length of 4 ms according to an embodiment of the present disclosure
  • 6A-6B are subframes of 5 ms in length and including 5 symbols according to an embodiment of the present invention. Schematic diagram of the pilot pattern;
  • 7A-7D are schematic diagrams of pilot patterns of a subframe having a length of 5 ms and including 6 symbols according to an embodiment of the present disclosure
  • 8A-8C are schematic diagrams of pilot patterns of a subframe having a length of 5 ms and including 8 symbols according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another network device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of a data transmission method on a network device side according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a data transmission method on a user equipment side according to an embodiment of the present invention.
  • the technical solution described in the embodiments of the present invention may be used in an LTE communication system, an LTE-Advanced (LTE-A), and a next-generation communication system supporting the MBMS.
  • the network device in the embodiment of the present invention is a base station, for example, the base station may It is an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, and is not limited in this application.
  • the user equipment in the embodiment of the present invention may be a wireless terminal or a wired terminal supporting an LTE communication system, an LTE-Advanced (LTE-A), and a next-generation communication system supporting the MBMS, and the wireless terminal may be provided to the user.
  • a device for voice and/or data connectivity, a handheld device with wireless connectivity, or other processing device connected to a wireless modem For example, PCS (Personal Communication Service) phones, tablets, personal digital assistants (PDAs, Personal Digital Assistant) and other devices.
  • PCS Personal Communication Service
  • PDAs Personal Digital Assistant
  • a network device is provided in the embodiment of the present invention, where the network device includes:
  • the first determining module 31 is configured to: according to at least one of a moving speed feature of the MBSFN area and a radius of the cell in the MBSFN area, or according to a moving speed of the MBSFN area And identifying at least one of a station spacing of the cells in the MBSFN area, and determining, for the user equipment in the MBSFN area, a subframe for data transmission;
  • the sending module 32 is configured to notify information about a frame structure of the subframe to a user equipment in the MBSFN area.
  • the network device is configured according to at least one of a moving speed feature of an MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area, and a station spacing of a cell in the MBSFN area. At least one of the information determines a subframe for data transmission for the user equipment in the MBSFN area, which improves flexibility and spectral efficiency of subframe selection.
  • the MBSFN area is an area composed of cells that are synchronized at the specified time and send the same information to the user equipment at a specific time and/or a specific frequency band, where the specific time is a pre-configured time, and the specific frequency band is a pre-defined Configured frequency bands.
  • the first determining module 31 determines a suitable subframe for the user equipment in the MBSFN area by using the MBSFN area as a granularity, and the user equipment in the MBSFN area uses the same frame structure for data transmission. Wherein each MBSFN area includes at least one cell. It should be noted that all user equipments in the MBSFN area use subframes of the same frame structure.
  • the network device may send the frame structure of the determined subframe to the user equipment by using a broadcast or multicast manner.
  • the first determining module 31 may determine, for the user equipment in the MBSFN area, a subframe for data transmission by:
  • the determined subframe for a user equipment within the MBSFN area as the Third Generation Partnership Project (The 3 rd Generation Partnership, 3GPP ) release (Release) 12 Protocol
  • the defined subframe of the MBSFN when the moving speed of the MBSFN area high-speed movement, the determined subframe for a user equipment within the MBSFN area as the Third Generation Partnership Project (The 3 rd Generation Partnership, 3GPP ) release (Release) 12 Protocol The defined subframe of the MBSFN.
  • the moving speed feature described in the embodiment of the present invention refers to a mobile feature of an area covered by a cell in an MBSFN area or a moving speed feature of a user equipment in an MBSFN area.
  • the moving speed characteristic is that the high speed moving means that the specified moving speed in the area covered by the cell in the MBSFN area is greater than a set speed threshold (such as a highway, a railway, etc.), or MBSFN The user equipment in the area moves faster than the set speed threshold.
  • a set speed threshold such as a highway, a railway, etc.
  • the speed threshold can be set according to actual needs.
  • the frame structure of the MBSFN subframe defined by the 3GPP Release 12 protocol determined by the first determining module 31 for the user equipment in the MBSFN area is: the subcarrier spacing is 7.5 kHz, and the CP length is 33.3 ⁇ s.
  • the subframe determined by the user equipment in the MBSFN area is A subframe whose length is greater than 1 ms and whose CP length is less than the set threshold.
  • the first determining module 31 may determine the moving speed feature of the MBSFN area according to the mobile characteristic of the cell coverage area in the MBSFN area or the moving speed of the user equipment in the MBSFN area.
  • the moving speed characteristic is that the non-high speed moving means that the specified moving speed in the area covered by the cell in the MBSFN area is less than or equal to the set speed threshold (such as a city road, etc.), or the user equipment moving speed in the MBSFN area. Less than or equal to the set speed threshold.
  • the first determining module 31 may determine a frame structure with a length greater than 1 ms and a smaller CP length for the user equipment in the MBSFN area, which may reduce the overhead of the CP length in one subframe and improve spectrum efficiency.
  • the set threshold is an empirical value, and the threshold can be determined by system simulation, for example, the threshold is set to 50 ⁇ s.
  • the set radius threshold is an empirical value, which can be determined by system simulation.
  • the sub-determined sub-users in the MBSFN area is a subframe whose length is greater than 1 ms and whose CP length is less than the set threshold.
  • the first determining module 31 may determine the moving speed feature of the MBSFN area according to the mobile characteristic of the cell coverage area in the MBSFN area or the moving speed of the user equipment in the MBSFN area.
  • the moving speed characteristic is that the non-high speed moving means that the specified moving speed in the area covered by the cell in the MBSFN area is less than or equal to the set speed threshold (such as a city road, etc.).
  • the set speed threshold such as a city road, etc.
  • the user equipment movement speed in the MBSFN area is less than or equal to the set speed threshold.
  • the first determining module 31 may determine, for the user equipment in the MBSFN area, a frame structure having a length greater than 1 ms and a smaller CP length, which may reduce the overhead of the CP length in one subframe and improve spectrum efficiency.
  • the set station spacing threshold is an empirical value, which can be determined by system simulation.
  • the subframe determined for the user equipment in the MBSFN area is a subframe whose length is greater than 1 ms and the CP length is greater than or equal to the set threshold.
  • the subframe is a subframe whose length is greater than 1 ms and whose CP length is greater than or equal to the set threshold. Therefore, the neighboring signal arrival time of the MBSFN cell is also smaller than the CP length, the neighbor interference is reduced, and the spectrum efficiency is improved.
  • the first determining module 31 determines, for the user equipment in the MBSFN area, a subframe whose length is greater than 1 ms, the CP length is greater than or equal to the set threshold, and the subcarrier spacing is less than the set threshold. In this way, the CP has a smaller overhead ratio.
  • the set threshold is an empirical value, which can be determined by system simulation, such as setting the threshold to 50 ms.
  • the subframe determined for the user equipment in the MBSFN area is a child whose length is greater than 1 ms and the CP length is greater than or equal to the set threshold. frame.
  • the subframe determined by the user equipment is a subframe whose length is greater than 1 ms and whose CP length is greater than or equal to the set threshold, so that the neighboring signal arrival time of the MBSFN cell is also smaller than the CP length, the neighbor interference is reduced, and the spectrum efficiency is improved.
  • the first determining module 31 may determine, for the user equipment in the MBSFN area, that the length is greater than 1 ms, the CP length is greater than or equal to the set threshold, and the subcarrier spacing is small. In the sub-frame of the set threshold, the CP has a smaller overhead ratio.
  • the subframe determined by the first determining module 31 for the user equipment in the MBSFN area includes one of a subframe of length 2 ms, a subframe of length 4 ms, and a subframe of length 5 ms. .
  • the frame structure of these three subframes will be described in detail below.
  • the subframe includes two or three symbols; wherein the pilot pattern corresponding to the subframe for transmitting the reference signal is:
  • REs of two adjacent reference signals on the same symbol are separated by 3 or 7 subcarriers in the frequency domain, or REs of adjacent two reference signals on different symbols are separated by 1 or 3 subbands in the frequency domain. Carrier.
  • OFDM Orthogonal Frequency Division Multiplex
  • the pilot pattern is as shown in FIG. 4A.
  • the shaded part in the figure is the RE where the reference signal is located.
  • each subframe includes 2 symbols, and only one of the same subcarriers is used for transmission reference.
  • the RE of the signal, the RE of the adjacent two reference signals on the same symbol are spaced apart by 7 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 3 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 2 symbols, and only one RE for transmitting the reference signal on the same subcarrier, the same symbol.
  • the REs of the adjacent two adjacent reference signals are spaced apart by 7 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 3 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 1 symbol, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 3 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 3 symbols, and only one RE for transmitting the reference signal on the same subcarrier, the same
  • the REs of the adjacent two reference signals on the symbol are separated by 7 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 3 subcarriers in the frequency domain.
  • the initial value c init of the reference signal sequence may be generated according to the subframe number, the symbol position occupied by the reference signal, and the MBSFN area identifier (ID):
  • n SF denotes a subframe number
  • l denotes a symbol position occupied by the reference signal
  • a subframe having a length of 2 ms includes the following two frame structures:
  • the subcarrier spacing is 1.875 kHz and the CP length is 133.3 ⁇ s; or
  • the subcarrier spacing is 1.25 kHz and the CP length is 200 ⁇ s.
  • the subcarrier spacing is 1.875 kHz, and the subframe having the CP length of 133.3 ⁇ s includes 3 symbols; the subcarrier spacing is 1.25 kHz, and the subframe having the CP length of 200 ⁇ s includes 2 symbols.
  • a subframe having a length of 2 ms can adopt the following two frame structures, as shown in Table 1:
  • the network device further includes: a second determining module 33;
  • the second determining module 33 is configured to: according to the TBS_L1 defined in the 3GPP Release 12 protocol a transport block size mapping table of a mapping relationship between TBS_L2, determining a TBS value corresponding to each subframe; and,
  • the sending module 32 is further configured to: send data to the user equipment according to a TBS value corresponding to each subframe.
  • the second determining module 33 first determines the TBS of the single layer transmission from the TBS mapping table indicating the single layer transmission defined in the 3GPP Release 12 protocol according to the transport block size index and the number of physical resource blocks occupied by the transmission.
  • the TBS_L2 corresponding to the determined TBS value of the single layer transmission is used as the TBS value corresponding to the subframe according to the transport block size mapping table of the mapping relationship between TBS_1 and TBS_2 defined in the 3GPP protocol.
  • the second determining module 33 may also modify the subframe scheduling-based mechanism to a symbol scheduling-based mechanism, so that the TBS mapping table representing the single-layer transmission defined in the existing 3GPP Release 12 protocol may also be multiplexed. details as follows:
  • the second determining module 33 is specifically configured to: determine a TBS value corresponding to each of the symbols according to a transport block size mapping table that represents a single layer transmission defined in the 3GPP Release 12 protocol; and,
  • the sending module 32 is further configured to: send data to the user equipment according to a TBS value corresponding to each of the symbols.
  • the second determining module 33 determines the TBS value of the single layer transmission from the TBS mapping table indicating the single layer transmission defined in the 3GPP Release 12 protocol according to the transport block size index and the number of physical resource blocks occupied by the transmission. And determining the determined TBS value as the TBS value corresponding to each of the symbols.
  • the subframe includes four, five or six symbols; wherein the pilot pattern corresponding to the subframe for transmitting the reference signal is:
  • the REs of two adjacent reference signals on the same symbol are separated by 3 or 7 subcarrier subcarriers in the frequency domain, or the REs of adjacent two reference signals on different symbols are spaced in the frequency domain by 1 Or 3 subcarriers.
  • each sub-frame includes 4 symbols, the same. There is only one RE for transmitting the reference signal on the subcarrier, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are at Three subcarriers are spaced in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 4 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the RE is separated by 1 symbol, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 4 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 1 symbol, and the REs of the adjacent two reference signals on the same symbol are separated by 3 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 1 subcarrier in the frequency domain.
  • the reference signal sequence c init can be generated according to the subframe number, the location of the symbol, and the MBSFN area ID:
  • a subframe having a length of 4 ms includes the following three frame structures:
  • the subcarrier spacing is 1.5 kHz and the CP length is 133.3 ⁇ s; or
  • the subcarrier spacing is 1.875 kHz and the CP length is 133.3 ⁇ s; or
  • the subcarrier spacing is 1.25 kHz and the CP length is 200 ⁇ s.
  • the subcarrier spacing is 1.5 kHz, and the subframe having the CP length of 133.3 ⁇ s includes 5 symbols; the subcarrier spacing is 1.875 kHz, and the subframe having the CP length of 133.3 ⁇ s includes 6 symbols; the subcarrier spacing A sub-frame of 1.25 kHz and a CP length of 200 ⁇ s includes 4 symbols.
  • a subframe with a length of 4 ms can adopt the following two frame structures, as shown in Table 2:
  • the network device further includes: a second determining module 33;
  • the second determining module 33 is configured to: determine, according to a transport block size mapping table that represents a mapping relationship between a TBS value TBS_L1 of the single layer transmission and a TBS value TBS_L4 of the fourth layer transmission defined in the 3GPP Release 12 protocol, corresponding to each subframe TBS value; and,
  • the sending module 32 is further configured to: send data to the user equipment according to a TBS value corresponding to each subframe.
  • the second determining module 33 first determines the TBS of the single layer transmission from the TBS mapping table indicating the single layer transmission defined in the 3GPP Release 12 protocol according to the transport block size index and the number of physical resource blocks occupied by the transmission.
  • the TBS_L4 corresponding to the determined TBS value of the single layer transmission is used as the TBS value corresponding to the subframe according to the transport block size mapping table of the mapping relationship between the TBS_1 and the TBS_4 defined in the 3GPP Release 12 protocol.
  • the second determining module 33 may also modify the subframe scheduling-based mechanism to a symbol scheduling-based mechanism, so that the TBS mapping table representing the single-layer transmission defined in the existing 3GPP Release 12 protocol may also be multiplexed. details as follows:
  • the second determining module 33 is specifically configured to: determine a TBS value corresponding to each of the symbols according to a transport block size mapping table that represents a single layer transmission defined in the 3GPP Release 12 protocol;
  • the sending module 32 is further configured to: send data to the user equipment according to a TBS value corresponding to each of the symbols.
  • the second determining module 33 determines the TBS value of the single layer transmission from the TBS mapping table indicating the single layer transmission defined in the 3GPP Release 12 protocol according to the transport block size index and the number of physical resource blocks occupied by the transmission. And determining the determined TBS value as the TBS value corresponding to each of the symbols.
  • the subframe for a subframe having a length of 5 ms, the subframe includes five, six or eight symbols; wherein the pilot pattern corresponding to the subframe for transmitting the reference signal is:
  • REs of two adjacent reference signals on the same symbol are separated by 3, 7, 15, or 23 subcarriers in the frequency domain, or REs of adjacent two reference signals on different symbols are in the frequency domain.
  • One, three or eleven subcarriers are spaced apart.
  • each sub-frame includes 5 symbols, the same.
  • the REs of two adjacent reference signals on the subcarrier are separated by 1 symbol in the time domain, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain, and adjacent on different symbols.
  • the REs where the two reference signals are located are separated by 3 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 5 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 3 symbols, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 3 subcarriers in the frequency domain.
  • the pilot pattern is illustrated as shown in FIG. 7A.
  • the shaded part in the figure is the RE where the reference signal is located.
  • each sub-picture The frame includes 6 symbols, and the REs of two adjacent reference signals on the same subcarrier are separated by 3 symbols in the time domain, and the REs of the adjacent two reference signals on the same symbol are spaced in the frequency domain.
  • the REs of two adjacent reference signals on different symbols are separated by 3 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 6 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 3 symbols, and the REs of the adjacent two reference signals on the same symbol are separated by 23 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 11 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 6 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 3 symbols, and the REs of the adjacent two reference signals on the same symbol are separated by 15 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 7 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 6 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 1 symbol, and the REs of the adjacent two reference signals on the same symbol are separated by 15 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 7 subcarriers in the frequency domain.
  • each sub-frame includes 8 symbols, the same.
  • the REs of two adjacent reference signals on the subcarrier are separated by 1 symbol in the time domain, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain, and adjacent on different symbols.
  • the REs where the two reference signals are located are separated by 3 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 8 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 3 symbols, and the REs of the adjacent two reference signals on the same symbol are separated by 7 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 3 subcarriers in the frequency domain.
  • the shaded portion in the figure is the RE where the reference signal is located.
  • each subframe includes 8 symbols, and the REs of two adjacent reference signals on the same subcarrier are in the time domain.
  • the REs are separated by 3 symbols, and the REs of the adjacent two reference signals on the same symbol are separated by 3 subcarriers in the frequency domain, and the REs of the adjacent two reference signals on different symbols are separated by 1 subcarrier in the frequency domain.
  • the initial value of the reference signal is:
  • the initial value of the reference signal is:
  • the initial value of the reference signal is:
  • a subframe having a length of 5 ms includes the following four frame structures:
  • the subcarrier spacing is 1.25 kHz and the CP length is 33.3 ⁇ s; or
  • the subcarrier spacing is 1.5 kHz and the CP length is 166.67 ⁇ s; or
  • the subcarrier spacing is 1.875 kHz and the CP length is 91.67 ⁇ s; or
  • the subcarrier spacing is 1.25 kHz and the CP length is 200 ⁇ s.
  • the subcarrier spacing is 1.25 kHz, and the subframe having the CP length of 33.3 ⁇ s includes 6 symbols; the subcarrier spacing is 1.5 kHz, and the subframe having the CP length of 166.67 ⁇ s includes 6 symbols; the subcarrier spacing A subframe of 1.875 kHz and having a CP length of 91.67 ⁇ s includes 8 symbols; a subcarrier spacing of 1.25 kHz, and a subframe having a CP length of 200 ⁇ s includes 5 symbols.
  • two frame structures of a subframe having a length of 5 ms can be as shown in Table 3:
  • the network device further includes: a second determining module 33;
  • the second determining module 33 is configured to: according to a transport block size mapping table that represents a mapping relationship between a TBS value TBS_L1 of a single layer transmission and a TBS value TBS_L4 of a four layer transmission defined in the 3GPP Release 12 protocol, or between TBS_L1 and TBS_L4 Extended transport block size for mapping relationships Mapping the table to determine the TBS value corresponding to each subframe; and,
  • the sending module 32 is further configured to: send data to the user equipment according to a TBS value corresponding to each subframe.
  • TTI Transmission Time Interval
  • the number of available REs is now increased by 5 times relative to the conventional eMBMS; for the 1/24CP, 1.25kHz subcarriers
  • the number of available REs is now six times higher than the traditional eMBMS. Therefore, when the subframe scheduling method is adopted, a new TBS table needs to be redefined to specify a mapping relationship between TBS_L1 and TBS_L5 and TBS_L6, respectively. Specifically, the following two situations are included:
  • the second determining module 33 is configured to: determine TBS_L1 according to the transport block size index and the number of physical resource blocks occupied by the transmission, and multiply the value obtained by multiplying the TBS_L1 by 5 as the first intermediate value;
  • the transport block size mapping table representing the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and has a minimum difference from the first intermediate value.
  • TBS_L4 determined as the TBS value corresponding to the subframe;
  • TBS_L4 that is less than or equal to the first intermediate value and has the smallest difference from the first intermediate value, Determine the TBS value corresponding to the subframe.
  • the second determining module 33 is configured to: determine TBS_L1 according to the transport block size index and the number of physical resource blocks occupied by the transmission, and multiply the value obtained by multiplying the TBS_L1 by 6 as a second intermediate value;
  • the second intermediate value is greater than 375448, determine the second intermediate value as a TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the second middle a TBS_L4 whose interval value and the difference from the second intermediate value is the smallest is determined as a TBS value corresponding to the subframe;
  • TBS_L4 that is less than or equal to the second intermediate value and has the smallest difference from the second intermediate value, Determine the TBS value corresponding to the subframe.
  • the transport block size mapping table indicating the mapping relationship between TBS_L1 and TBS_L4 defined in the existing 3GPP Release 12 protocol is shown in Table 4:
  • TBS_L4 305976 314888 324336 339112 351224 363336 375448
  • the second determining module 33 may also modify the subframe scheduling manner to a symbol scheduling based manner, so that the transport block size mapping table indicating the single layer transmission defined in the existing 3GPP Release 12 protocol may be multiplexed. details as follows:
  • the second determining module 33 is configured to: determine a TBS value corresponding to each of the symbols according to a transport block size mapping table that represents a single layer transmission defined in the 3GPP Release 12 protocol;
  • the sending module 32 is further configured to: send data to the user equipment according to a TBS value corresponding to each of the symbols.
  • the second determining module 33 determines the TBS value of the single layer transmission from the TBS mapping table indicating the single layer transmission defined in the 3GPP Release 12 protocol according to the transport block size index and the number of physical resource blocks occupied by the transmission. And determining the determined TBS value as the TBS value corresponding to each of the symbols.
  • the sub-frame length is 2 ms, 4 ms, and 5 ms respectively.
  • the user equipment in the MBSFN area may also determine other subframes whose length is greater than 1 ms. No more examples are given.
  • the sending module 32 sends the frame structure information of the subframe determined by the first determining module 31, and may have multiple implementation manners:
  • the information related to the frame structure of the subframe is notified to the user equipment in the MBSFN area by using a System Information Block (SIB) SIB message sent in the LTE system cell.
  • SIB System Information Block
  • the sending module 32 may notify the user equipment in the MBSFN area of the information related to the frame structure of the subframe by using the SIB message sent in the LTE system cell.
  • the LTE system cell refers to a cell in which all downlink subframes send unicast services (that is, a cell that only transmits unicast services), or part of downlink subframes are used to send unicast services, and some downlink subframes are used to send MBMS.
  • the cell of the service that is, the cell in which the unicast service and the MBMS service are mixed).
  • the sending module 32 may carry information related to the frame structure of the determined subframe by using the bit information, for example, using 4-bit information to represent information related to the frame structure of different subframes, and 0001 indicating 3GPP.
  • the length of the Release 12 protocol is 1 ms
  • the CP length is 16.67 ⁇ s
  • the subcarrier spacing is 15 kHz.
  • the 0010 indicates that the length of the 3GPP Release 12 protocol is 1 ms, the CP length is 33.3 ⁇ s, and the subcarrier spacing is 7.5 kHz.
  • the frame; 0011 indicates a subframe having a length of 2 ms, a CP length of 133.3 ⁇ s, and a subcarrier spacing of 1.875 kHz defined in the embodiment of the present invention
  • 0100 indicates that the length defined in the embodiment of the present invention is 2 ms, the CP length is 200 ⁇ s, and the subcarrier spacing is a sub-frame of 1.25 kHz; and so on.
  • the embodiment of the present invention may further carry information related to the frame structure of the determined subframe in the SIB message.
  • the embodiment of the present invention does not limit the specific manner, as long as the SIB message is used to determine the subframe.
  • the manner in which the frame structure related information is notified to the user equipment is covered by the scope of protection of the embodiments of the present invention.
  • the sending module 32 notifies the user equipment in the MBSFN area to the user equipment in the MBSFN area by sending different primary synchronization sequences to the user equipment, where different primary synchronization sequences are used by the MBSFN cell.
  • the different primary synchronization sequences used by the MBSFN cell correspond to different frame structures.
  • the frame structure of the subframe using the length of 1 ms is used (for example, the CP length is 16.67 ⁇ s, the sub-length If the carrier interval is 15 kHz, if the synchronization sequence 2 is sent to the user equipment, the first frame structure of the subframe with a length of 5 ms (that is, a subframe with a CP length of 33.3 ⁇ s and a subcarrier spacing of 1.25 kHz) is used. and many more.
  • Which of the synchronization sequences indicates which frame structure of the subframe can be determined by the network device and then notified to the user equipment, or is determined by the network device and the user equipment, or pre-agreed, as long as the synchronization sequence is determined by the network device and the user equipment.
  • Species The understanding of the frame structure of the sub-frames is uniform.
  • the MBSFN cell refers to a cell that is only used to transmit a dedicated carrier.
  • This method can be applied to a scenario in the LTE system where there is no LTE system cell capable of supporting configuration information transmission of a dedicated carrier.
  • the transmitting module 32 notifies the user equipment in the MBSFN area of the information related to the frame structure of the subframe by using a Master Information Block (MIB) message transmitted in the MBSFN cell.
  • MIB Master Information Block
  • the sending module 32 may carry information related to the frame structure of the determined subframe by using the bit information in the MIB message.
  • the embodiment of the present invention may further carry information related to the frame structure of the determined subframe in the MIB message.
  • the embodiment of the present invention does not limit the specific manner, as long as the MIB message is used to determine the subframe. The manner in which the frame structure related information is notified to the user equipment is covered by the scope of protection of the embodiments of the present invention.
  • This method can be applied to a scenario in the LTE system where there is no LTE system cell capable of supporting configuration information transmission of a dedicated carrier.
  • the information related to the frame structure of the subframe determined by the first determining module 31 includes: at least one of length information of the CP and the number of symbols in the subframe, length information of the subframe, and subframe information. Subcarrier spacing information.
  • frame structure information of the subframe may be based on at least one of the length information of the CP of the subframe and the number of symbols in the subframe, The length information of the subframe and the subcarrier spacing information of the subframe are determined.
  • information related to the frame structure of the subframe may also be notified to the user equipment in the MBSFN area by other means, for example, by using a new message or using cells of other existing messages.
  • the information related to the frame structure of the determined subframe is any information that can indicate the specific information of the frame structure, for example, in addition to the above examples, the information related to the frame structure of the determined subframe may exist. The index of the corresponding relationship and so on.
  • an embodiment of the present invention provides a user equipment.
  • the user equipment includes:
  • the receiving module 91 is configured to receive, by the network device, information related to a frame structure of a subframe used for data transmission;
  • the first processing module 92 is configured to determine, according to the frame structure related information received by the receiving module 91, the subframe determined by the network device as the user equipment in the MBSFN area;
  • the subframe is the network device according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area and the MBSFN area. At least one of the station spacings of the cells is determined.
  • the receiving module 91 is specifically configured to:
  • Information related to a frame structure of a subframe for data transmission transmitted by the network device is received through an MIB message transmitted in an MBSFN cell.
  • the information related to the frame structure of the subframe used for data transmission includes: length information of the CP and at least one of the number of symbols in the subframe, length information of the subframe, and subcarrier spacing information of the subframe.
  • the subframe determined by the first processing module 92 is: a subframe of an MBSFN defined by the 3GPP Release 12 protocol; or a subframe whose length is greater than 1 ms and the CP length is less than a set threshold; or, the length is greater than 1 ms.
  • the subframe having a length greater than 1 ms includes one of a subframe having a length of 2 ms, a subframe having a length of 4 ms, and a subframe having a length of 5 ms.
  • a subframe having a length of 2 ms includes one of a subframe having a length of 2 ms, a subframe having a length of 4 ms, and a subframe having a length of 5 ms.
  • the user equipment further includes a second processing module 93;
  • the second processing module 93 is configured to: indicate a single layer transmission according to the definition in the 3GPP Release 12 protocol.
  • the transport block size mapping table is configured to determine a TBS value corresponding to each of the symbols; the receiving module 91 is further configured to: receive data sent by the network device according to a TBS value corresponding to each of the symbols;
  • the second processing module 93 is configured to: determine, for a subframe having a length of 2 ms, each subframe according to a transport block size mapping table that represents a mapping relationship between a TBS value TBS_L1 and a TBS_L2 of a single layer transmission defined in the 3GPP Release 12 protocol. Corresponding TBS value; the receiving module 91 is further configured to: receive data sent by the network device according to a TBS value corresponding to each subframe;
  • the second processing module 93 is configured to determine, for a subframe having a length of 4 ms, each subframe according to a transport block size mapping table that represents a mapping relationship between a TBS value TBS_L1 and a TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol. Corresponding TBS value; the receiving module 91 is further configured to: receive data sent by the network device according to a TBS value corresponding to each subframe;
  • the second processing module 93 is configured to: for a subframe having a length of 5 ms, a transport block size mapping table indicating a mapping relationship between TBS values TBS_L1 and TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol, or indicating TBS_L1 and TBS_L4
  • the extended transport block size mapping table of the mapping relationship determines the TBS value corresponding to each subframe; the receiving module 91 is further configured to: receive the data sent by the network device according to the TBS value corresponding to each subframe.
  • the second processing module 93 allocates a transport block size mapping table indicating a mapping relationship between a TBS value TBS_L1 and TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol, or a transmission indicating a layer 4 transmission defined in the 3GPP Release 12 protocol.
  • the block size mapping table determines the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 5 is taken as the first intermediate value;
  • the transport block size mapping table representing the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and is related to the first medium
  • the TBS_L4 with the smallest difference between the values is determined as the TBS value corresponding to the subframe;
  • TBS_L4 that is less than or equal to the first intermediate value and has the smallest difference from the first intermediate value, Determine the TBS value corresponding to the subframe.
  • the second processing module 93 allocates a transport block size mapping table indicating a mapping relationship between a TBS value TBS_L1 and TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol, or a transmission indicating a layer 4 transmission defined in the 3GPP Release 12 protocol.
  • the block size mapping table determines the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 6 is taken as the second intermediate value;
  • the second intermediate value is greater than 375448, determine the second intermediate value as a TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the second intermediate value and is opposite to the second intermediate
  • the TBS_L4 with the smallest value difference is determined as the TBS value corresponding to the subframe
  • TBS_L4 that is less than or equal to the second intermediate value and has the smallest difference from the second intermediate value, Determine the TBS value corresponding to the subframe.
  • an embodiment of the present invention provides another network device.
  • the network device includes:
  • the processor 101 is configured to: according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or according to a moving speed feature of the MBSFN area and a station spacing of the cell in the MBSFN area. At least one information determining a subframe for data transmission for the user equipment in the MBSFN area;
  • a transmitter 102 configured to notify, to the MBSFN, information related to a frame structure of the subframe User equipment in the area.
  • processor 101 For the functions of the processor 101, refer to the first determining module 31 and the second determining module 33 in the foregoing network device, and details are not described herein again.
  • the function that is specifically performed by the transmitter 102 is referred to the sending module 32 in the foregoing network device, and details are not described herein again.
  • the subframe that is determined by the processor 101 for the user equipment in the MBSFN area to be longer than 1 ms includes a subframe with a length of 2 ms, a subframe with a length of 4 ms, and a subframe with a length of 5 ms.
  • a subframe with a length of 2 ms includes a subframe with a length of 2 ms, a subframe with a length of 4 ms, and a subframe with a length of 5 ms.
  • an embodiment of the present invention further provides a user equipment.
  • the user equipment includes:
  • the receiver 111 is configured to receive frame structure information sent by the network device.
  • the processor 112 is configured to determine, according to the frame structure information received by the receiver 111, a subframe that is determined by the network device for the user equipment in the MBSFN area for data transmission;
  • the subframe is the network device according to at least one of a moving speed feature of the MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area and the MBSFN area. At least one of the station spacings of the cells is determined.
  • the receiver 111 For the function of the receiver 111, refer to the receiving module 91 in the foregoing user equipment, and details are not described herein again.
  • the functions of the processor 112 are specifically referred to the first processing module 92 and the second processing module 93 in the foregoing user equipment, and details are not described herein again.
  • the subframe determined by the processor 112 is: a subframe of an MBSFN defined by the 3GPP Release 12 protocol; or a subframe whose length is greater than 1 ms and the CP length is less than a set threshold; or, the length is greater than 1 ms and the CP A subframe whose length is less than the set threshold.
  • the subframe having a length greater than 1 ms includes a subframe having a length of 2 ms and a length of 4 ms.
  • One of a subframe and a subframe of 5 ms in length For the description of the frame structure of the subframe of the length of 2 ms, the subframe of the length of 4 ms, and the subframe of the length of 5 ms, refer to the description in the foregoing network device, and details are not described herein again.
  • the embodiment of the present invention further provides a data transmission method on the network device side. As shown in FIG. 12, the method includes:
  • a subframe for data transmission is determined for user equipment within the MBSFN area.
  • the MBSFN area is used as the granularity, and a suitable subframe is selected for the user equipment in the MBSFN area, and the user equipment in the MBSFN area uses the same frame structure for data transmission.
  • each MBSFN area includes at least one cell.
  • information related to the frame structure of the subframe may be transmitted to the user equipment by means of broadcast or multicast.
  • the optional subframe structure includes an MBSFN subframe (with a length of 1 ms) and a subframe with a length greater than 1 ms defined by the 3GPP Release 12 protocol, so that an optional frame is added in different networking scenarios. Structure for increased flexibility and spectral efficiency.
  • the S121 to S122 can be implemented by a network side device, such as a base station.
  • a subframe for data transmission may be determined for a user equipment in the MBSFN area by:
  • the subframe determined for the user equipment in the MBSFN area is a subframe of the MBSFN defined by the 3GPP Release 12 protocol;
  • the subframe determined by the user equipment in the MBSFN area is longer than the length. a subframe of 1 ms and having a CP length less than a set threshold; or
  • the subframe determined for the user equipment in the MBSFN area is a subframe having a length greater than 1 ms and a CP length less than a set threshold;
  • the frame is a subframe whose length is greater than 1 ms and whose CP length is greater than or equal to the set threshold.
  • the information about the frame structure of the subframe is notified to the user equipment in the MBSFN area, including:
  • Information related to the frame structure of the subframe is notified to the user equipment in the MBSFN area by the MIB message transmitted in the MBSFN cell.
  • the information related to the frame structure of the subframe determined in S121 includes: length information of the CP and at least one of the number of symbols in the subframe, length information of the subframe, and subcarrier spacing information of the subframe.
  • the subframe whose length is greater than 1 ms determined in S121 includes one of a subframe having a length of 2 ms, a subframe having a length of 4 ms, and a subframe having a length of 5 ms.
  • a subframe having a length of 2 ms a subframe having a length of 4 ms
  • a subframe having a length of 5 ms a subframe having a length of 5 ms.
  • the method may further include:
  • the transport block size mapping table for single layer transmission defined in the 3GPP Release 12 protocol, Determining a TBS value corresponding to each of the symbols; and transmitting data to the user equipment according to a TBS value corresponding to each of the symbols; or
  • a TBS value corresponding to each subframe is determined according to a transport block size mapping table indicating a mapping relationship between a TBS value TBS_L1 and a TBS_L2 of a single layer transmission defined in the 3GPP Release 12 protocol, and according to each The TBS value corresponding to the subframe, sending data to the user equipment; or
  • the TBS value corresponding to each subframe is determined, and according to each The TBS value corresponding to the subframe, sending data to the user equipment; or
  • a transport block size mapping table For a subframe having a length of 5 ms, a transport block size mapping table indicating a mapping relationship between TBS values TBS_L1 and TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol, or an extension indicating a mapping relationship between TBS_L1 and TBS_L4
  • the transport block size mapping table determines a TBS value corresponding to each subframe, and sends data to the user equipment according to the TBS value corresponding to each subframe.
  • the transport block size mapping table indicating the mapping relationship between the TBS value TBS_L1 and the TBS_L4 of the single layer transmission defined in the 3GPP Release 12 protocol, or the transport block size mapping table indicating the four layer transmission defined in the 3GPP Release 12 protocol Determine the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 5 is taken as the first intermediate value;
  • the transport block size mapping table representing the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and has a minimum difference from the first intermediate value.
  • TBS_L4 determined as the TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the mapping relationship between TBS_L1 and TBS_L4 defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and is the first The TBS_L4 with the smallest difference of the intermediate values is determined as the TBS value corresponding to the subframe.
  • the transport block size mapping table indicating the mapping relationship between the TBS value TBS_L1 and the TBS_L4 of the single layer transmission defined in the 3GPP Release 12 protocol, or the transport block size mapping table indicating the four layer transmission defined in the 3GPP Release 12 protocol Determine the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 6 is taken as the second intermediate value;
  • the second intermediate value is greater than 375448, determine the second intermediate value as a TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the second intermediate value and is opposite to the second intermediate
  • the TBS_L4 with the smallest value difference is determined as the TBS value corresponding to the subframe
  • TBS_L4 that is less than or equal to the second intermediate value and has the smallest difference from the second intermediate value, Determine the TBS value corresponding to the subframe.
  • the embodiment of the present invention further provides a data transmission method on the user equipment side. As shown in FIG. 13, the method includes:
  • S131 Receive information related to a frame structure of a subframe used for data transmission sent by the network device.
  • S132 Determine, according to information about the received frame structure, a subframe that is determined by the network device as a user equipment in an MBSFN area.
  • the subframe is at least one of a moving speed feature of the network device according to an MBSFN area and a radius of a cell in the MBSFN area, or a moving speed feature according to an MBSFN area, and a cell in the MBSFN area. At least one of the information of the station spacing is determined.
  • receiving, by the network device, information related to a frame structure of a subframe used for data transmission including:
  • Information related to a frame structure of a subframe for data transmission transmitted by the network device is received through an MIB message transmitted in an MBSFN cell.
  • the subframe determined in S132 is:
  • a subframe of the MBSFN defined by the 3GPP Release 12 protocol or a subframe having a length greater than 1 ms and a CP length less than a set threshold; or a subframe having a length greater than 1 ms and a CP length less than a set threshold.
  • the subframe having a length greater than 1 ms includes one of a subframe having a length of 2 ms, a subframe having a length of 4 ms, and a subframe having a length of 5 ms.
  • a subframe having a length of 2 ms includes one of a subframe having a length of 2 ms, a subframe having a length of 4 ms, and a subframe having a length of 5 ms.
  • the method further includes:
  • the TBS value corresponding to the subframe receiving data sent by the network device; or
  • the TBS value corresponding to the subframe receiving data sent by the network device; or
  • a transport block size mapping table indicating a mapping relationship between TBS values TBS_L1 and TBS_L4 of a single layer transmission defined in the 3GPP Release 12 protocol, or an extension indicating a mapping relationship between TBS_L1 and TBS_L4 Transmitting a block size mapping table, determining a TBS value corresponding to each subframe; and receiving data sent by the network device according to a TBS value corresponding to each subframe.
  • the transport block size mapping table indicating the mapping relationship between the TBS value TBS_L1 and the TBS_L4 of the single layer transmission defined in the 3GPP Release 12 protocol, or the transport block size mapping table indicating the four layer transmission defined in the 3GPP Release 12 protocol Determine the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 5 is taken as the first intermediate value;
  • the transport block size mapping table representing the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the first intermediate value and has a minimum difference from the first intermediate value.
  • TBS_L4 determined as the TBS value corresponding to the subframe;
  • TBS_L4 that is less than or equal to the first intermediate value and has the smallest difference from the first intermediate value, Determine the TBS value corresponding to the subframe.
  • the transport block size mapping table indicating the mapping relationship between the TBS value TBS_L1 and the TBS_L4 of the single layer transmission defined in the 3GPP Release 12 protocol, or the transport block size mapping table indicating the four layer transmission defined in the 3GPP Release 12 protocol Determine the TBS value corresponding to the subframe, including:
  • TBS_L1 is determined according to the transport block size index and the number of physical resource blocks occupied by the transmission, and The value obtained by multiplying the TBS_L1 by 6 is taken as the second intermediate value;
  • the second intermediate value is greater than 375448, determine the second intermediate value as a TBS value corresponding to the subframe;
  • the transport block size mapping table indicating the four-layer transmission defined in the 3GPP Release 12 protocol is less than or equal to the second intermediate value and is opposite to the second intermediate
  • the TBS_L4 with the smallest value difference is determined as the TBS value corresponding to the subframe
  • TBS_L4 that is less than or equal to the second intermediate value and has the smallest difference from the second intermediate value, Determine the TBS value corresponding to the subframe.
  • the above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device. Having a series of operational steps performed on a computer or other programmable device to produce computer-implemented processing such that instructions executed on a computer or other programmable device are provided for implementing one or more processes and/or block diagrams in the flowchart. The steps of a function specified in a box or multiple boxes.

Abstract

本发明实施例公开了数据传输方法和设备,用于解决在多种站间距的场景下,由于现有MBMS/eMBMS系统中的帧结构限制,降低了频谱效率。方法包括:根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;将与所述确定的用于数据传输的子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,从而提高了子帧选择的灵活性和频谱效率。

Description

数据传输方法和设备
本申请要求在2014年11月24日提交中国专利局、申请号为201410682270.5、发明名称为“数据传输方法和设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域,特别涉及一种数据传输方法和设备。
背景技术
多媒体广播/组播业务(Multimedia Broadcast Multicast Service,MBMS)是一种同时向多个用户提供相同数据的业务。在网络承载上,MBMS业务采用广播或组播的方式进行传输,从而实现网络(包括核心网和接入网)资源共享,以尽可能少的资源实现对尽可能多且具有相同需求的多媒体用户的服务。MBMS的多媒体广播/组播业务单频网(MBMS Single Frequency Network,MBSFN)传输模式要求一定区域内的所有小区在相同的时间、频率上,使用相同的调制编码模式,发送相同的数据包。
长期演进(Long Term Evolution,LTE)MBMS/增强型多媒体广播/组播业务(enhanced-MBMS,eMBMS)系统的频谱使用包括以下两种情况:一种是MBMS系统独占一个载频,称为专用载波MBMS(DC-MBMS);另一种是MBMS和单播(Unicast)系统共享一个载波,称为混合载波MBMS(MC-MBMS)。在混合载波MBMS中,最多只有6个子帧可以用作MBMS的传输。
目前LTE系统的子帧长度为1ms(毫秒)。对于MC-MBMS来说,其帧结构如图1所示,每个子帧包括2个时隙,每个时隙内有6个符号,子载波间隔为15kHz,循环前缀(Cyclic Prefix,CP)长度为16.67μs(微秒),图中阴影部分的资源单元(Resource Element,RE)上传输MBSFN参考信号。对 于DC-MBMS来说,其帧结构如图2所示,每个子帧包括2个时隙,每个时隙内有3个符号,子载波间隔为7.5kHz,CP长度为33.3μs,图中阴影部分的RE上传输MBSFN参考信号。
可以看出,现有LTE MBMS/eMBMS系统中仅支持15kHz和7.5kHz子载波间隔,且CP长度仅有为16.6μs或33.3μs两种。若在电视广播和蜂窝融合的场景下引入MBMS/eMBMS技术,则需要MBMS/eMBMS技术支持更大的站间距,但是现有的帧结构的CP长度限制了大站间距场景下MBSFN的性能。在多种站间距的场景下,由于现有MBMS/eMBMS系统中的帧结构限制,降低了频谱效率。
发明内容
本发明实施例公开了一种数据传输方法和设备,解决了在多种站间距的场景下,由于现有MBMS/eMBMS系统中的帧结构限制,降低了频谱效率的问题。
第一方面,一种网络设备,该网络设备包括:
第一确定模块,用于根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
发送模块,用于将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
结合第一方面,在第一种可能的实现方式中,所述第一确定模块具体用于:
若所述MBSFN区域的移动速度特征为高速移动,为所述MBSFN区域内的用户设备确定的子帧为3GPP Release12协议定义的MBSFN的子帧;或者
若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大半径小于或等于设定的半径阈值,为所述MBSFN区域内的用 户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧;或者
若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大站间距小于或等于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧;或者
若所述MBSFN区域内的小区的最大半径大于设定的半径阈值,或所述MBSFN区域内的小区的最大站间距大于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧。
结合第一方面,在第二种可能的实现方式中,所述发送模块具体用于:
通过在长期演进LTE系统小区内发送的SIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备;或者
通过向所述用户设备发送不同主同步序列,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,其中,MBSFN小区使用的不同主同步序列对应不同的子帧的帧结构相关的信息;或者
通过在MBSFN小区内发送的MIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
结合第一方面的第二种可能的实现方式,在第三种可能的实现方式中,与所述第一确定模块确定的子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
结合第一方面的第一种可能的实现方式,在第四种可能的实现方式中,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。
结合第一方面的第四种可能的实现方式,在第五种可能的实现方式中,所述长度为2ms的子帧中包括2个或3个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
结合第一方面的第五种可能的实现方式,在第六种可能的实现方式中,所述长度为2ms的子帧的帧结构为:
子载波间隔为1.875kHz,且CP长度为133.3μs;或者
子载波间隔为1.25kHz,且CP长度为200μs。
结合第一方面的第四种可能的实现方式,在第七种可能的实现方式中,所述长度为4ms的子帧,中包括4个、5个或6个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
结合第一方面的第七种可能的实现方式,在第八种可能的实现方式中,所述长度为4ms的子帧的帧结构为:
子载波间隔为1.5kHz,且CP长度为133.3μs;或者
子载波间隔为1.875kHz,且CP长度为133.3μs;或者
子载波间隔为1.25kHz,且CP长度为200μs。
结合第一方面的第四种可能的实现方式,在第九种可能的实现方式中,所述长度为5ms的子帧中包括5个、6个或8个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个或3个符号;
同一符号上的相邻两个参考信号所在的RE在频域上间隔3个、7个、15个或23个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个或11个子载波。
结合第一方面的第九种可能的实现方式,在第十种可能的实现方式中,所述长度为5ms的子帧的帧结构为:
子载波间隔为1.25kHz,且CP长度为33.3μs;或者
子载波间隔为1.5kHz,且CP长度为166.67μs;或者
子载波间隔为1.875kHz,且CP长度为91.67μs;或者
子载波间隔为1.25kHz,且CP长度为200μs。
结合第一方面的第九种可能的实现方式、或第一方面的第十种可能的实现方式,在第十一种可能的实现方式中,该网络设备还包括:第二确定模块;
所述第二确定模块用于:根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的TBS值;所述发送模块还用于:根据每个所述符号所对应的TBS值,向所述用户设备发送数据;
或者,
所述第二确定模块用于:对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述发送模块还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据;
或者,
所述第二确定模块用于:对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述发送模块还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据;
或者,
所述第二确定模块用于:对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的 传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值;所述发送模块还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据。
结合第一方面的第十一种可能的实现方式,在第十二种可能的实现方式中,所述第二确定模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
结合第一方面的第十一种可能的实现方式,在第十三种可能的实现方式中,所述第二确定模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
第二方面,一种用户设备,该用户设备包括:
接收模块,用于接收网络设备发送的与用于数据传输的子帧的帧结构相关的信息;
第一处理模块,用于根据所述接收模块接收到的帧结构相关的信息,确定出所述网络设备为MBSFN区域内的用户设备确定的子帧;
其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
结合第二方面的第一种可能的实现方式,在第二种可能的实现方式中,所述第一处理模块确定出的子帧为:
3GPP Release12协议定义的MBSFN的子帧;或者
长度大于1ms且CP长度小于设定的门限值的子帧;或者
长度大于1ms且CP长度小于设定的门限值的子帧。
结合第二方面的第一种可能的实现方式,在第三种可能的实现方式中,所述接收模块具体用于:
通过在长期演进LTE系统小区内发送的SIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息;或者
接收所述网络设备发送的不同主同步序列,MBSFN小区使用的不同主同步序列对应不同的用于数据传输的子帧的帧结构的相关信息;或者
通过在MBSFN小区内发送的MIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息。
结合第二方面的第三种可能的实现方式,在第四种可能的实现方式中,与用于数据传输的子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
结合第二方面的第二种可能的实现方式,在第五种可能的实现方式中,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。
结合第二方面的第五种可能的实现方式,在第六种可能的实现方式中,该用户设备还包括:第二处理模块;
所述第二处理模块用于:根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的传输块大小TBS值;所述接收模块还用于:根据每个所述符号所对应的TBS值,接收所述网络设备发送的数据;
或者,
所述第二处理模块用于:对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与双层传输的TBS值TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述接收模块还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;
或者,
所述第二处理模块用于:对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述接收模块还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;
或者,
所述第二处理模块用于:对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值;所述接收模块还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据。
结合第二方面的第六种可能的实现方式,在第七种可能的实现方式中,所述第二处理模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
结合第二方面的第六种可能的实现方式,在第八种可能的实现方式中,所述第二处理模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
第三方面,一种数据传输方法,该方法包括:
根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
第四方面,一种数据传输方法,该方法包括:
接收网络设备发送的与用于数据传输的子帧的帧结构相关的信息;
根据接收到的帧结构相关的信息,确定出所述网络设备为MBSFN区域内的用户设备确定的子帧;
其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
第五方面,一种网络设备,包括:
处理器,用于根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述 MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
发送器,用于将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
第六方面,一种用户设备,包括:
接收器,用于接收网络设备发送的帧结构信息;
处理器,用于根据所述接收器接收到的帧结构信息,确定出所述网络设备为MBSFN区域内的用户设备确定的用于数据传输的子帧;
其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
本发明实施例提供的数据传输方法和设备中,网络设备根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧,提高了子帧选择的灵活性和频谱效率。
附图说明
图1为LTE系统中MC-MBMS帧结构的示意图;
图2为LTE系统中DC-MBMS帧结构的示意图;
图3为本发明实施例提供的一种网络设备的结构示意图;
图4A~图4D为本发明实施例提供的长度为2ms的子帧的导频图案示意图;
图5A~图5C为本发明实施例提供的长度为4ms的子帧的导频图案示意图;
图6A~图6B为本发明实施例提供的长度为5ms且包括5个符号的子帧的 导频图案示意图;
图7A~图7D为本发明实施例提供的长度为5ms且包括6个符号的子帧的导频图案示意图;
图8A~图8C为本发明实施例提供的长度为5ms且包括8个符号的子帧的导频图案示意图;
图9为本发明实施例提供的一种用户设备的结构示意图;
图10为本发明实施例提供的另一种网络设备的结构示意图;
图11为本发明实施例提供的另一种用户设备的结构示意图;
图12为本发明实施例提供的一种网络设备侧的数据传输方法的示意图;
图13为本发明实施例提供的一种用户设备侧的数据传输方法的示意图。
具体实施方式
下面结合说明书附图对本发明实施例作进一步详细描述。应当理解,此处所描述的实施例仅用于说明和解释本发明,并不用于限定本发明。
本本发明实施例描述的技术方案可用于LTE通信系统、长期演进增强(LTE-Advanced,LTE-A)以及下一代支持MBMS的通信系统,本发明实施例中的网络设备为基站,例如,基站可以是LTE中的演进型基站(NodeB或eNB或e-NodeB,evolutional Node B),本申请并不限定。
本发明实施例中的用户设备,可以是支持LTE通信系统、长期演进增强(LTE-Advanced,LTE-A)以及下一代支持MBMS的通信系统的无线终端或有线终端,无线终端可以是指向用户提供语音和/或数据连通性的设备,具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。例如,个人通信业务(PCS,Personal Communication Service)电话、平板电脑、个人数字助理(PDA,Personal Digital Assistant)等设备。
如图3所示,本发明实施例提供的一种网络设备,该网络设备包括:
第一确定模块31,用于根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特 征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
发送模块32,用于将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
本发明实施例提供的网络设备根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧,提高了子帧选择的灵活性和频谱效率。
本发明实施例中,MBSFN区域是指定时同步相同,且在特定时刻和/或特定频段向用户设备发送相同信息的小区所组成的区域,其中,特定时刻为预先配置的时刻,特定频段为预先配置的频段。第一确定模块31以MBSFN区域为粒度,为该MBSFN区域内的用户设备确定合适的子帧,该MBSFN区域内的用户设备使用相同的帧结构进行数据传输。其中,每个MBSFN区域内包括至少一个小区。需要说明的是,MBSFN区域内所有的用户设备使用相同的帧结构的子帧。
本发明实施例中,由于是MBSFN区域,网络设备可以采用广播或组播的方式,向用户设备发送所确定的子帧的帧结构。
具体地,第一确定模块31可以通过以下方式为所述MBSFN区域内的用户设备确定用于数据传输的子帧:
一、若所述MBSFN区域的移动速度特征为高速移动,为所述MBSFN区域内的用户设备确定的子帧为第三代合作伙伴计划(The 3rd Generation Partnership,3GPP)版本(Release)12协议定义的MBSFN的子帧。
本发明实施例中所述的移动速度特征是指MBSFN区域内的小区所覆盖的区域的移动特征或MBSFN区域内的用户设备的移动速度特征。
其中,移动速度特征为高速移动是指MBSFN区域内的小区所覆盖的区域内规定的移动速度大于设定的速度阈值(如高速公路、铁路等),或者,MBSFN 区域内的用户设备移动速度大于设定的速度阈值。可以理解的是,该速度阈值可以根据实际需要设置。
该方式下,第一确定模块31为所述MBSFN区域内的用户设备确定的3GPP Release12协议定义的MBSFN子帧的帧结构为:子载波间隔为7.5kHz,且CP长度为33.3μs。
二、若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大半径小于或等于设定的半径阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧。
该方式下,第一确定模块31可根据MBSFN区域内的小区覆盖区域的移动特性、或MBSFN区域内的用户设备的移动速度,确定该MBSFN区域的移动速度特征。其中,移动速度特征为非高速移动是指MBSFN区域内的小区所覆盖的区域内规定的移动速度小于或等于设定的速度阈值(如城市道路等),或者,MBSFN区域内的用户设备移动速度小于或等于设定的速度阈值。
该方式下,第一确定模块31可以为所述MBSFN区域内的用户设备确定长度大于1ms且CP长度较小的帧结构,可以减少CP长度在一个子帧中的开销,提高频谱效率。
该方式下,设定的门限值为经验值,可通过系统仿真确定门限值,如门限值设为50μs。
该方式下,设定的半径阈值为经验值,可通过系统仿真确定。
三、若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大站间距小于或等于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧。
该方式下,第一确定模块31可根据MBSFN区域内的小区覆盖区域的移动特性、或MBSFN区域内的用户设备的移动速度,确定该MBSFN区域的移动速度特征。其中,移动速度特征为非高速移动是指MBSFN区域内的小区所覆盖的区域内规定的移动速度小于或等于设定的速度阈值(如城市道路等), 或者,MBSFN区域内的用户设备移动速度小于或等于设定的速度阈值。
该方式下,第一确定模块31可以为所述MBSFN区域内的用户设备确定长度为大于1ms且CP长度较小的帧结构,可以减少CP长度在一个子帧中的开销,提高频谱效率。
该方式下,设定的站间距阈值为经验值,可通过系统仿真确定。
四、若MBSFN区域内的小区的最大半径大于设定的半径阈值,为该MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧。
该方式下,若MBSFN区域内的小区的最大半径大于设定的半径阈值,此时,无论MBSFN区域的移动速度特征为高速移动或非高速移动,都为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧,从而可以保证MBSFN小区的邻区信号到达时刻也小于CP长度,减少邻区干扰,提升频谱效率。
该方式下,进一步,第一确定模块31为所述MBSFN区域内的用户设备确定长度大于1ms、CP长度大于或等于设定的门限值、且子载波间隔小于设定的阈值的子帧,这样,CP的开销比例更小。
其中,设定的阈值为经验值,可通过系统仿真确定,如阈值设为50ms。
五、若MBSFN区域内的小区的最大站间距大于设定的站间距阈值,为该MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧。
该方式下,若所述MBSFN区域内的小区的最大站间距大于设定的站间距阈值,此时,无论MBSFN区域的移动速度特征为高速移动或非高速移动,都为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧,从而保证MBSFN小区的邻区信号到达时刻也小于CP长度,减少邻区干扰,提升频谱效率。
该方式下,进一步,第一确定模块31可以为所述MBSFN区域内的用户设备确定长度大于1ms、CP长度大于或等于设定的门限值、且子载波间隔小 于设定的阀值的子帧,这样,CP的开销比例更小。
基于上述任一实施例,第一确定模块31为所述MBSFN区域内的用户设备确定的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。下面对这三种子帧的帧结构进行详细说明。
一、长度为2ms的子帧。
该帧结构下,子帧中包括2个或3个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
本发明实施例中所涉及的符号,一般是指正交频分复用(Orthogonal Frequency Division Multiplex,OFDM)。
举例说明上述导频图案,如图4A所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括2个符号,同一子载波上仅有一个用于传输参考信号的RE,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。又如图4B所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括2个符号,同一子载波上仅有一个用于传输参考信号的RE,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波。再如图4C所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括3个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。再如图4D所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括3个符号,同一子载波上仅有一个用于传输参考信号的RE,同一 符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。
该帧结构下,参考信号序列的初始值cinit可以根据子帧号、参考信号所占用的符号位置和MBSFN区域(area)标识(ID)产生:
Figure PCTCN2015094924-appb-000001
其中,nSF表示子帧号,l表示参考信号所占用的符号位置,
Figure PCTCN2015094924-appb-000002
表示MBSFN area ID。
该帧结构下,长度为2ms的子帧包括以下两种帧结构:
子载波间隔为1.875kHz,且CP长度为133.3μs;或者
子载波间隔为1.25kHz,且CP长度为200μs。
具体的,子载波间隔为1.875kHz,且CP长度为133.3μs的子帧中包括3个符号;子载波间隔为1.25kHz,且CP长度为200μs的子帧中包括2个符号。
例如,长度为2ms的子帧的可以采用以下两种帧结构,如表1所示:
Figure PCTCN2015094924-appb-000003
表1
该帧结构下,由于每个子帧内的RE个数为1ms子帧的两倍,可以采用基于子帧调度的机制,复用现有表示单层传输的传输块大小(Transport Block Size,TBS)值TBS_L1与双层传输的TBS值TBS_L2之间的映射关系的传输块大小映射表,确定每个子帧对应的TBS,向用户设备发送数据。具体的:该网络设备还包括:第二确定模块33;
第二确定模块33用于:根据3GPP Release12协议中定义的TBS_L1与 TBS_L2之间的映射关系的传输块大小映射表,确定每个子帧所对应的TBS值;以及,
发送模块32还用于:根据每个子帧所对应的TBS值向所述用户设备发送数据。
具体的,第二确定模块33先根据传输块大小索引和传输所占用的物理资源块的个数,从3GPP Release12协议中定义的表示单层传输的TBS映射表中,确定出单层传输的TBS值;再根据3GPP协议中定义的TBS_1与TBS_2之间的映射关系的传输块大小映射表,将与所确定的单层传输的TBS值对应的TBS_L2作为该子帧对应的TBS值。
该帧结构下,第二确定模块33也可以将基于子帧调度的机制修改为基于符号调度的机制,从而也可以复用现有3GPP Release12协议中定义的表示单层传输的TBS映射表。具体如下:
第二确定模块33具体用于:根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的TBS值;以及,
发送模块32还用于:根据每个所述符号所对应的TBS值,向所述用户设备发送数据。
具体的,第二确定模块33根据传输块大小索引和传输所占用的物理资源块的个数,从3GPP Release12协议中定义的表示单层传输的TBS映射表中,确定出单层传输的TBS值,并将确定出的TBS值作为每个所述符号所对应的TBS值。
二、长度为4ms的子帧。
该帧结构下,子帧中包括4个、5个或6个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1 个或3个子载波。
下面以每个子帧包括4个符号为例说明上述导频图案,如图5A所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括4个符号,同一子载波上仅有一个用于传输参考信号的RE,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。又如图5B所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括4个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波。再如图5C所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括4个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个子载波。
该帧结构下,参考信号序列cinit可以根据子帧号、符号所在位置和MBSFN area ID产生:
Figure PCTCN2015094924-appb-000004
该帧结构下,长度为4ms的子帧包括以下三种帧结构:
子载波间隔为1.5kHz,且CP长度为133.3μs;或者
子载波间隔为1.875kHz,且CP长度为133.3μs;或者
子载波间隔为1.25kHz,且CP长度为200μs。
具体的,子载波间隔为1.5kHz,且CP长度为133.3μs的子帧中包括5个符号;子载波间隔为1.875kHz,且CP长度为133.3μs的子帧中包括6个符号;子载波间隔为1.25kHz,且CP长度为200μs的子帧中包括4个符号。
例如,长度为4ms的子帧可以采用如下两种帧结构,如表2所示:
Figure PCTCN2015094924-appb-000005
表2
该帧结构下,由于每个子帧内的RE个数为1ms子帧的四倍,可以采用基于子帧调度的机制,复用现有3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定每个子帧对应的TBS值,向用户设备发送数据。具体的:该网络设备还包括:第二确定模块33;
第二确定模块33用于:根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定每个子帧所对应的TBS值;以及,
发送模块32还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据。
具体的,第二确定模块33先根据传输块大小索引和传输所占用的物理资源块的个数,从3GPP Release12协议中定义的表示单层传输的TBS映射表中,确定出单层传输的TBS值;再根据3GPP Release12协议中定义的TBS_1与TBS_4之间的映射关系的传输块大小映射表,将与所确定的单层传输的TBS值对应的TBS_L4作为该子帧对应的TBS值。
该帧结构下,第二确定模块33也可以将基于子帧调度的机制修改为基于符号调度的机制,从而也可以复用现有3GPP Release12协议中定义的表示单层传输的TBS映射表。具体如下:
第二确定模块33具体用于:根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的TBS值;以及
发送模块32还用于:根据每个所述符号所对应的TBS值,向所述用户设备发送数据。
具体的,第二确定模块33根据传输块大小索引和传输所占用的物理资源块的个数,从3GPP Release12协议中定义的表示单层传输的TBS映射表中,确定出单层传输的TBS值,并将确定出的TBS值作为每个所述符号所对应的TBS值。
三、长度为5ms的子帧。
该帧结构下,对于长度为5ms的子帧,该子帧中包括5个、6个或8个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个或3个符号;
同一符号上的相邻两个参考信号所在的RE在频域上间隔3个、7个、15个或23个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个、3个或11个子载波。
下面以每个子帧包括5个符号为例说明上述导频图案,如图6A所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括5个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。又如图6B所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括5个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔3个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。
下面以每个子帧包括6个符号为例说明上述导频图案,例说明上述导频图案,如图7A所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括6个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔3个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7 个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。又如图7B所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括6个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔3个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔23个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔11个子载波。又如图7C所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括6个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔3个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔15个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波。再如图7D所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括6个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔15个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波。
下面以每个子帧包括8个符号为例说明上述导频图案,如图8A所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括8个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。又如图8B所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括8个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔3个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔7个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波。再如图8C所示,图中阴影部分为参考信号所在的RE,从图中可以看出,每个子帧包括8个符号,同一子载波上的相邻两个参考信号所在的RE在时域上间隔3个符号,同一符号上的相邻两个参考信号所在的RE在频域上间隔3个子载波,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个子载波。
该帧结构下,对于包括5个符号的子帧,参考信号的初始值为:
Figure PCTCN2015094924-appb-000006
该帧结构下,对于包括6个符号的子帧,参考信号的初始值为:
Figure PCTCN2015094924-appb-000007
该帧结构下,对于包括8个符号的子帧,参考信号的初始值为:
Figure PCTCN2015094924-appb-000008
该帧结构下,长度为5ms的子帧包括以下四种帧结构:
子载波间隔为1.25kHz,且CP长度为33.3μs;或者
子载波间隔为1.5kHz,且CP长度为166.67μs;或者
子载波间隔为1.875kHz,且CP长度为91.67μs;或者
子载波间隔为1.25kHz,且CP长度为200μs。
具体的,子载波间隔为1.25kHz,且CP长度为33.3μs的子帧中包括6个符号;子载波间隔为1.5kHz,且CP长度为166.67μs的子帧中包括6个符号;子载波间隔为1.875kHz,且CP长度为91.67μs的子帧中包括8个符号;子载波间隔为1.25kHz,且CP长度为200μs的子帧中包括5个符号。
例如,长度为5ms的子帧的两种帧结构可以如表3所示:
Figure PCTCN2015094924-appb-000009
表3
该帧结构下,网络设备还包括:第二确定模块33;
第二确定模块33用于:根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小 映射表,确定出每个子帧对应的TBS值;以及,
发送模块32还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据。
对5ms发送时间间隔(Transmission Time Interval,TTI)的情况,对1/4CP,1.25kHz子载波的情况,现在可用RE的数量相对于传统eMBMS增加了5倍;对1/24CP,1.25kHz子载波的情况,现在可用RE的数量相对于传统eMBMS增加了6倍。因此在采用基于子帧调度的方式时,需要重新定义新的TBS表格,以规定TBS_L1分别与TBS_L5和TBS_L6的映射关系。具体包括以下两种情况:
一、对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍。
第二确定模块33用于:根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
二、对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍。
第二确定模块33用于:根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中 间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
其中,现有3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表如表4所示:
Figure PCTCN2015094924-appb-000010
表4
现有3GPP Release12协议中定义的用于表示四层传输的四层传输的传输 块大小映射表中部分TBS_L4如表5所示:
TBS_L4
305976
314888
324336
339112
351224
363336
375448
表5
该帧结构下,第二确定模块33也可以将基于子帧调度的方式修改为基于符号调度的方式,从而可以复用现有3GPP Release12协议中定义的表示单层传输的传输块大小映射表。具体如下:
第二确定模块33用于:根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的TBS值;以及
发送模块32还用于:根据每个所述符号所对应的TBS值,向所述用户设备发送数据。
具体的,第二确定模块33根据传输块大小索引和传输所占用的物理资源块的个数,从3GPP Release12协议中定义的表示单层传输的TBS映射表中,确定出单层传输的TBS值,并将确定出的TBS值作为每个所述符号所对应的TBS值。
需要说明的是,本发明实施例以子帧长度为2ms,4ms,5ms分别进行举例说明,在实际应用中也可以为所述MBSFN区域内的用户设备确定其他长度大于1ms的子帧,此处不再一一举例说明。
基于上述任一实施例,发送模块32发送第一确定模块31确定出的子帧的帧结构信息,可以有多种实现方式:
一、通过在LTE系统小区内发送的系统信息块(System Information Block,SIB)SIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
该方式下,若LTE系统中存在能够辅助专用载波的配置信息传输的LTE 系统小区,则发送模块32可以通过在该LTE系统小区内发送的SIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
其中,LTE系统小区是指所有下行子帧都发送单播业务的小区(即仅发送单播业务的小区),或者,部分下行子帧用于发送单播业务且部分下行子帧用于发送MBMS业务的小区(即单播业务和MBMS业务混合的小区)。
举例说明,发送模块32可以通过比特信息将与确定出的子帧的帧结构相关的信息携带在SIB消息中,例如,采用4比特信息表示与不同子帧的帧结构相关的信息,0001表示3GPP Release12协议中定义的长度为1ms,CP长度为16.67μs,子载波间隔为15kHz的子帧;0010表示3GPP Release12协议中定义的长度为1ms,CP长度为33.3μs,子载波间隔为7.5kHz的子帧;0011表示本发明实施例定义的长度为2ms,CP长度为133.3μs,子载波间隔为1.875kHz的子帧;0100表示本发明实施例定义的长度为2ms,CP长度为200μs,子载波间隔为1.25kHz的子帧;等等。
当然,本发明实施例还可以采用其他方式在SIB消息中携带与确定出的子帧的帧结构相关的信息,本发明实施例不对具体方式进行限定,只要通过SIB消息将与确定出的子帧的帧结构相关的信息通知给用户设备的方式均涵盖在本发明实施例的保护范围内。
二、发送模块32通过向所述用户设备发送不同主同步序列,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,其中,MBSFN小区使用的不同主同步序列对应不同子帧的帧结构相关的信息。
该方式下,MBSFN小区使用的不同主同步序列对应不同的帧结构,例如,若向用户设备发送同步序列1表示使用长度为1ms的子帧的一种帧结构(如CP长度为16.67μs,子载波间隔为15kHz的子帧),若向用户设备发送同步序列2表示使用长度为5ms的子帧的第一种帧结构(即CP长度为33.3μs,子载波间隔为1.25kHz的子帧),等等。具体哪个同步序列表示哪种子帧的帧结构可以由网络设备确定后通知给用户设备,或者由网络设备与用户设备协商确定,或者预先约定,只要保证网络设备与用户设备对哪个同步序列表示哪种 子帧的帧结构的理解一致即可。
其中,MBSFN小区是指仅用于发送专用载波的小区。
该方式可以适用于LTE系统中不存在能够辅助专用载波的配置信息传输的LTE系统小区的场景。
三、发送模块32通过在MBSFN小区内发送的主信息块(Master Information Block,MIB)消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
举例说明,发送模块32可以通过比特信息将与确定出的子帧的帧结构相关的信息携带在MIB消息中。当然,本发明实施例还可以采用其他方式在MIB消息中携带与确定出的子帧的帧结构相关的信息,本发明实施例不对具体方式进行限定,只要通过MIB消息将与确定出的子帧的帧结构相关的信息通知给用户设备的方式均涵盖在本发明实施例的保护范围内。
该方式可以适用于LTE系统中不存在能够辅助专用载波的配置信息传输的LTE系统小区的场景。
基于上述任一方式,与第一确定模块31确定的子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
需要说明的是,子帧的其他帧结构信息(如快速傅立叶变换大小、覆盖范围、最大支持的移动速度等)可以根据子帧的CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息确定。
可以理解的是,还可以通过其他方式将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,例如通过一个新的消息或者利用现有的其他的消息的信元等,而与确定出的子帧的帧结构相关的信息为任何可以表示出帧结构具体信息的信息,例如除了上述举例之外,还可以为与确定出的子帧的帧结构相关的信息存在对应关系的索引等等。
基于同一发明构思,本发明实施例提供了一种用户设备,如图9所示,该用户设备包括:
接收模块91,用于接收网络设备发送的与用于数据传输的子帧的帧结构相关的信息;
第一处理模块92,用于根据接收模块91接收到的帧结构相关的信息,确定出所述网络设备为MBSFN区域内的用户设备确定的子帧;
其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
在实施中,接收模块91具体用于:
通过在LTE系统小区内发送的SIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息;或者
接收所述网络设备发送的不同主同步序列,MBSFN小区使用的不同主同步序列对应不同的用于数据传输的子帧的帧结构相关的信息;或者
通过在MBSFN小区内发送的MIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息。
具体的,与用于数据传输的子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
具体的,第一处理模块92确定出的子帧为:3GPP Release12协议定义的MBSFN的子帧;或者,长度大于1ms且CP长度小于设定的门限值的子帧;或者,长度大于1ms且CP长度小于设定的门限值的子帧。
其中,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。本发明实施例提供的长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧的帧结构的描述,可参见上述网络设备中的描述,此处不再赘述。
在实施中,该用户设备还包括第二处理模块93;
第二处理模块93用于:根据3GPP Release12协议中定义的表示单层传输 的传输块大小映射表,确定每个所述符号所对应的TBS值;接收模块91还用于:根据每个所述符号所对应的TBS值,接收所述网络设备发送的数据;
或者,
第二处理模块93用于:对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;接收模块91还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;
或者,
第二处理模块93用于:对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;接收模块91还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;
或者,
第二处理模块93用于:对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值;接收模块91还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据。
具体的,第二处理模块93根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中 间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
具体的,第二处理模块93根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
基于同一发明构思,本发明实施例提供了另一种网络设备,如图10所示,该网络设备包括:
处理器101,用于根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
发送器102,用于将与所述子帧的帧结构相关的信息通知给所述MBSFN 区域内的用户设备。
在实施中,处理器101具体执行的功能参见上述网络设备中的第一确定模块31和第二确定模块33,此处不再赘述。
在实施中,发送器102具体执行的功能参见上述网络设备中的发送模块32,此处不再赘述。
基于上述任一实施例,处理器101为所述MBSFN区域内的用户设备确定的长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。其中,长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧的帧结构的描述,可参见上述网络设备中的描述,此处不再赘述。
基于同一发明构思,本发明实施例还提供了一种用户设备,如图11所示,该用户设备包括:
接收器111,用于接收网络设备发送的帧结构信息;
处理器112,用于根据所述接收器111接收到的帧结构信息,确定出所述网络设备为MBSFN区域内的用户设备确定的用于数据传输的子帧;
其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
在实施中,接收器111具体执行的功能参见上述用户设备中的接收模块91,此处不再赘述。
在实施中,处理器器112具体执行的功能参见上述用户设备中的第一处理模块92和第二处理模块93,此处不再赘述。
在实施中,处理器112确定出的子帧为:3GPP Release12协议定义的MBSFN的子帧;或者,长度大于1ms且CP长度小于设定的门限值的子帧;或者,长度大于1ms且CP长度小于设定的门限值的子帧。
其中,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的 子帧和长度为5ms的子帧中的一种。本发明实施例提供的长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧的帧结构的描述,可参见上述网络设备中的描述,此处不再赘述。
基于同一发明构思,本发明实施例还提供了一种网络设备侧的数据传输方法,如图12所示,该方法包括:
S121、根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧。
本步骤中,以MBSFN区域为粒度,为该MBSFN区域内的用户设备选择合适的子帧,该MBSFN区域内的用户设备使用相同的帧结构进行数据传输。其中,每个MBSFN区域内包括至少一个小区。
S122、将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
本步骤中,由于是MBSFN区域,可以采用广播或组播的方式,向用户设备发送与所述子帧的帧结构相关的信息。
本发明实施例中,可供选择的子帧结构包括3GPP Release12协议定义的MBSFN子帧(长度为1ms)和长度大于1ms的子帧,以使在不同组网场景下,增加了可选的帧结构,提高了灵活性和频谱效率。
本发明实施例中,S121~S122的可以通过网络侧设备实现,如基站等。
具体地,S121中,可以通过以下方式为所述MBSFN区域内的用户设备确定用于数据传输的子帧:
若所述MBSFN区域的移动速度特征为高速移动,为所述MBSFN区域内的用户设备确定的子帧为3GPP Release12协议定义的MBSFN的子帧;或者
若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大半径小于或等于设定的半径阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧;或者
若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大站间距小于或等于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧;或者
若所述MBSFN区域内的小区的最大半径大于设定的半径阈值,或所述MBSFN区域内的小区的最大站间距大于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧。
基于上述任一实施例,S122中,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,包括:
通过在LTE系统小区内发送的SIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备;或者
通过向所述用户设备发送不同主同步序列,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,其中,MBSFN小区使用的不同主同步序列对应不同的子帧的帧结构相关的信息;或者
通过在MBSFN小区内发送的MIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
具体的,与S121中确定出的子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
其中,S121中确定出的长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。本发明实施例提供的长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧的帧结构的描述,可参见上述网络设备中的描述,此处不再赘述。
在实施中,S122中,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备之后,该方法还可以包括:
根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表, 确定每个所述符号所对应的TBS值;以及根据每个所述符号所对应的TBS值,向所述用户设备发送数据;或者,
对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值,并根据每个子帧所对应的TBS值,向所述用户设备发送数据;或者,
对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值,并根据每个子帧所对应的TBS值,向所述用户设备发送数据;或者,
对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值,并根据每个子帧所对应的TBS值,向所述用户设备发送数据。
具体的,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一 中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
具体的,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
基于同一发明构思,本发明实施例还提供了一种用户设备侧的数据传输方法,如图13所示,该方法包括:
S131、接收网络设备发送的与用于数据传输的子帧的帧结构相关的信息;
S132、根据接收到的帧结构相关的信息,确定出所述网络设备为MBSFN区域内的用户设备确定的子帧;
其中,所述子帧为所述网络设备根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
在实施中,S131中,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息,包括:
通过在LTE系统小区内发送的SIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息;或者
接收所述网络设备发送的不同主同步序列,MBSFN小区使用的不同主同步序列对应不同的子帧的帧结构相关的信息;或者
通过在MBSFN小区内发送的MIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息。
在实施中,S132中确定出的子帧为:
3GPP Release12协议定义的MBSFN的子帧;或者,长度大于1ms且CP长度小于设定的门限值的子帧;或者,长度大于1ms且CP长度小于设定的门限值的子帧。
其中,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。本发明实施例提供的长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧的帧结构的描述,可参见上述网络设备中的描述,此处不再赘述。
在实施中,S132中,确定出所述网络设备为MBSFN区域内的用户设备确定的子帧之后,该方法还包括:
根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的TBS值;以及根据每个所述符号所对应的TBS值,接收所述网络设备发送的数据;或者,
对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;以及根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;或者,
对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;以及根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;或者,
对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值;以及根据每个子帧所对应的TBS值,接收所述网络设备发送的数据。
具体的,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
具体的,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
上述方法处理流程可以用软件程序实现,该软件程序可以存储在存储介质中,当存储的软件程序被调用时,执行上述方法步骤。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (43)

  1. 一种网络设备,其特征在于,该网络设备包括:
    第一确定模块,用于根据多媒体广播/组播业务MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
    发送模块,用于将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
  2. 如权利要求1所述的网络设备,其特征在于,所述第一确定模块具体用于:
    若所述MBSFN区域的移动速度特征为高速移动,为所述MBSFN区域内的用户设备确定的子帧为第三代合作伙伴计划3GPP版本Release12协议定义的MBSFN的子帧;或者
    若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大半径小于或等于设定的半径阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且循环前缀CP长度小于设定的门限值的子帧;或者
    若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大站间距小于或等于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧;或者
    若所述MBSFN区域内的小区的最大半径大于设定的半径阈值,或所述MBSFN区域内的小区的最大站间距大于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧。
  3. 如权利要求1所述的网络设备,其特征在于,所述发送模块具体用于:
    通过在长期演进LTE系统小区内发送的系统信息块SIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备;或者
    通过向所述用户设备发送不同主同步序列,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,其中,MBSFN小区使用的不同主同步序列对应不同的子帧的帧结构相关的信息;或者
    通过在MBSFN小区内发送的主信息块MIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
  4. 如权利要求3所述的网络设备,其特征在于,与所述第一确定模块确定的子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
  5. 如权利要求2所述的网络设备,其特征在于,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。
  6. 如权利要求5所述的网络设备,其特征在于,所述长度为2ms的子帧中包括2个或3个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
    同一子载波上仅有一个用于传输参考信号的资源单元RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
    同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
  7. 如权利要求6所述的网络设备,其特征在于,所述长度为2ms的子帧的帧结构为:
    子载波间隔为1.875kHz,且CP长度为133.3μs;或者
    子载波间隔为1.25kHz,且CP长度为200μs。
  8. 如权利要求5所述的网络设备,其特征在于,所述长度为4ms的子帧,中包括4个、5个或6个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
    同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
    同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
  9. 如权利要求8所述的网络设备,其特征在于,所述长度为4ms的子帧的帧结构为:
    子载波间隔为1.5kHz,且CP长度为133.3μs;或者
    子载波间隔为1.875kHz,且CP长度为133.3μs;或者
    子载波间隔为1.25kHz,且CP长度为200μs。
  10. 如权利要求5所述的网络设备,其特征在于,所述长度为5ms的子帧中包括5个、6个或8个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
    同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个或3个符号;
    同一符号上的相邻两个参考信号所在的RE在频域上间隔3个、7个、15个或23个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个或11个子载波。
  11. 如权利要求10所述的网络设备,其特征在于,所述长度为5ms的子帧的帧结构为:
    子载波间隔为1.25kHz,且CP长度为33.3μs;或者
    子载波间隔为1.5kHz,且CP长度为166.67μs;或者
    子载波间隔为1.875kHz,且CP长度为91.67μs;或者
    子载波间隔为1.25kHz,且CP长度为200μs。
  12. 如权利要求10或11所述的网络设备,其特征在于,该网络设备还包括:第二确定模块;
    所述第二确定模块用于:根据3GPP Release12协议中定义的表示单层传 输的传输块大小映射表,确定每个所述符号所对应的传输块大小TBS值;所述发送模块还用于:根据每个所述符号所对应的TBS值,向所述用户设备发送数据;
    或者,
    所述第二确定模块用于:对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与双层传输的TBS值TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述发送模块还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据;
    或者,
    所述第二确定模块用于:对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述发送模块还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据;
    或者,
    所述第二确定模块用于:对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值;所述发送模块还用于:根据每个子帧所对应的TBS值,向所述用户设备发送数据。
  13. 如权利要求12所述的网络设备,其特征在于,所述第二确定模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
    若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  14. 如权利要求12所述的网络设备,其特征在于,所述第二确定模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
    若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
    若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  15. 一种用户设备,其特征在于,该用户设备包括:
    接收模块,用于接收网络设备发送的与用于数据传输的子帧的帧结构相关的信息;
    第一处理模块,用于根据所述接收模块接收到的帧结构相关的信息,确 定出所述网络设备为多媒体广播/组播业务MBSFN区域内的用户设备确定的子帧;
    其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
  16. 如权利要求15所述的用户设备,其特征在于,所述第一处理模块确定出的子帧为:
    第三代合作伙伴计划3GPP版本Release12协议定义的MBSFN的子帧;或者
    长度大于1ms且循环前缀CP长度小于设定的门限值的子帧;或者
    长度大于1ms且CP长度小于设定的门限值的子帧。
  17. 如权利要求15所述的用户设备,其特征在于,所述接收模块具体用于:
    通过在长期演进LTE系统小区内发送的系统信息块SIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息;或者
    接收所述网络设备发送的不同主同步序列,MBSFN小区使用的不同主同步序列对应不同的用于数据传输的子帧的帧结构的相关信息;或者
    通过在MBSFN小区内发送的主信息块MIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息。
  18. 如权利要求17所述的用户设备,其特征在于,与用于数据传输的子帧的帧结构相关的信息包括:循环前缀CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
  19. 如权利要求16所述的用户设备,其特征在于,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。
  20. 如权利要求19所述的用户设备,其特征在于,该用户设备还包括: 第二处理模块;
    所述第二处理模块用于:根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的传输块大小TBS值;所述接收模块还用于:根据每个所述符号所对应的TBS值,接收所述网络设备发送的数据;
    或者,
    所述第二处理模块用于:对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与双层传输的TBS值TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述接收模块还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;
    或者,
    所述第二处理模块用于:对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;所述接收模块还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;
    或者,
    所述第二处理模块用于:对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值;所述接收模块还用于:根据每个子帧所对应的TBS值,接收所述网络设备发送的数据。
  21. 如权利要求20所述的用户设备,其特征在于,所述第二处理模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS 值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
    若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  22. 如权利要求20所述的用户设备,其特征在于,所述第二处理模块根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
    若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
    若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  23. 一种数据传输方法,其特征在于,该方法包括:
    根据多媒体广播/组播业务MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧;
    将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
  24. 如权利要求23所述的方法,其特征在于,根据MBSFN区域的移动速度特征、所述MBSFN区域内的小区的半径、所述MBSFN区域内的小区的站间距中的至少一个信息,为所述MBSFN区域内的用户设备确定用于数据传输的子帧,包括:
    若所述MBSFN区域的移动速度特征为高速移动,为所述MBSFN区域内的用户设备确定的子帧为第三代合作伙伴计划3GPP版本Release12协议定义的MBSFN的子帧;或者
    若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大半径小于或等于设定的半径阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且循环前缀CP长度小于设定的门限值的子帧;或者
    若所述MBSFN区域的移动速度特征为非高速移动,且所述MBSFN区域内的小区的最大站间距小于或等于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度小于设定的门限值的子帧;或者
    若所述MBSFN区域内的小区的最大半径大于设定的半径阈值,或所述MBSFN区域内的小区的最大站间距大于设定的站间距阈值,为所述MBSFN区域内的用户设备确定的子帧为长度大于1ms且CP长度大于或等于设定的门限值的子帧。
  25. 如权利要求23所述的方法,其特征在于,将与所述子帧的帧结构相 关的信息通知给所述MBSFN区域内的用户设备,包括:
    通过在长期演进LTE系统小区内发送的系统信息块SIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备;或者
    通过向所述用户设备发送不同主同步序列,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备,其中,MBSFN小区使用的不同主同步序列对应不同的子帧的帧结构相关的信息;或者
    通过在MBSFN小区内发送的主信息块MIB消息,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备。
  26. 如权利要求25所述的方法,其特征在于,与所述子帧的帧结构相关的信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
  27. 如权利要求24所述的方法,其特征在于,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。
  28. 如权利要求27所述的方法,其特征在于,所述长度为2ms的子帧中包括2个或3个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
    同一子载波上仅有一个用于传输参考信号的资源单元RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
    同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
  29. 如权利要求27或28所述的方法,其特征在于,所述长度为2ms的子帧的帧结构为:
    子载波间隔为1.875kHz,且CP长度为133.3μs;或者
    子载波间隔为1.25kHz,且CP长度为200μs。
  30. 如权利要求27所述的方法,其特征在于,所述长度为4ms的子帧,中包括4个、5个或6个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
    同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个符号;
    同一符号上的相邻两个参考信号所在的RE在频域上间隔3个或7个子载波子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个子载波。
  31. 如权利要求27或30所述的方法,其特征在于,所述长度为4ms的子帧的帧结构为:
    子载波间隔为1.5kHz,且CP长度为133.3μs;或者
    子载波间隔为1.875kHz,且CP长度为133.3μs;或者
    子载波间隔为1.25kHz,且CP长度为200μs。
  32. 如权利要求27所述的方法,其特征在于,所述长度为5ms的子帧中包括5个、6个或8个符号;其中,该子帧对应的用于传输参考信号的导频图案为:
    同一子载波上仅有一个用于传输参考信号的RE,或者,同一子载波上的相邻两个参考信号所在的RE在时域上间隔1个或3个符号;
    同一符号上的相邻两个参考信号所在的RE在频域上间隔3个、7个、15个或23个子载波,或者,不同符号上的相邻两个参考信号所在的RE在频域上间隔1个或3个或11个子载波。
  33. 如权利要求27或32所述的方法,其特征在于,所述长度为5ms的子帧的帧结构为:
    子载波间隔为1.25kHz,且CP长度为33.3μs;或者
    子载波间隔为1.5kHz,且CP长度为166.67μs;或者
    子载波间隔为1.875kHz,且CP长度为91.67μs;或者
    子载波间隔为1.25kHz,且CP长度为200μs。
  34. 如权利要求32或33所述的方法,其特征在于,将与所述子帧的帧结构相关的信息通知给所述MBSFN区域内的用户设备之后,该方法还包括:
    根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表, 确定每个所述符号所对应的传输块大小TBS值;以及根据每个所述符号所对应的TBS值,向所述用户设备发送数据;或者,
    对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与双层传输的TBS值TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值,并根据每个子帧所对应的TBS值,向所述用户设备发送数据;或者,
    对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值,并根据每个子帧所对应的TBS值,向所述用户设备发送数据;或者,
    对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大小映射表,确定出每个子帧对应的TBS值,并根据每个子帧所对应的TBS值,向所述用户设备发送数据。
  35. 如权利要求34所述的方法,其特征在于,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
    若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一 中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  36. 如权利要求34所述的方法,其特征在于,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
    若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
    若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  37. 一种数据传输方法,其特征在于,该方法包括:
    接收网络设备发送的与用于数据传输的子帧的帧结构相关的信息;
    根据接收到的帧结构相关的信息,确定出所述网络设备为多媒体广播/组播业务MBSFN区域内的用户设备确定的子帧;
    其中,所述子帧为所述网络设备根据所述MBSFN区域的移动速度特征和所述MBSFN区域内的小区的半径中的至少一个信息、或者根据MBSFN区域的移动速度特征和所述MBSFN区域内的小区的站间距中的至少一个信息确定的。
  38. 如权利要求37所述的方法,其特征在于,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息,包括:
    通过在长期演进LTE系统小区内发送的系统信息块SIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息;或者
    接收所述网络设备发送的不同主同步序列,MBSFN小区使用的不同主同步序列对应不同的子帧的帧结构相关的信息;或者
    通过在MBSFN小区内发送的主信息块MIB消息,接收所述网络设备发送的与用于数据传输的子帧的帧结构相关的信息。
  39. 如权利要求38所述的方法,其特征在于,所述子帧的帧结构的相关信息包括:CP的长度信息和子帧内符号个数中的至少一个信息、子帧的长度信息、以及子帧的子载波间隔信息。
  40. 如权利要求39所述的方法,其特征在于,所述长度大于1ms的子帧包括长度为2ms的子帧、长度为4ms的子帧和长度为5ms的子帧中的一种。
  41. 如权利要求40所述的方法,其特征在于,确定出所述网络设备为MBSFN区域内的用户设备确定的子帧之后,该方法还包括:
    根据3GPP Release12协议中定义的表示单层传输的传输块大小映射表,确定每个所述符号所对应的传输块大小TBS值;以及根据每个所述符号所对应的TBS值,接收所述网络设备发送的数据;或者,
    对于长度为2ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与双层传输的TBS值TBS_L2之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;以及根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;或者,
    对于长度为4ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表,确定出每个子帧对应的TBS值;以及根据每个子帧所对应的TBS值,接收所述网络设备发送的数据;或者,
    对于长度为5ms的子帧,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者表示TBS_L1与TBS_L4之间的映射关系的扩展的传输块大 小映射表,确定出每个子帧对应的TBS值;以及根据每个子帧所对应的TBS值,接收所述网络设备发送的数据。
  42. 如权利要求41所述的方法,其特征在于,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的5倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以5得到的值作为第一中间值;
    若所述第一中间值大于305976,将3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第一中间值且与所述第一中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
  43. 如权利要求41所述的方法,其特征在于,根据3GPP Release12协议中定义的表示单层传输的TBS值TBS_L1与四层传输的TBS值TBS_L4之间的映射关系的传输块大小映射表、或者3GPP Release12协议中定义的表示四层传输的传输块大小映射表,确定出该子帧对应的TBS值,包括:
    对于长度为5ms的子帧且该子帧中的RE个数为3GPP Release12协议的MBSFN子帧的6倍,根据传输块大小索引和传输所占用的物理资源块的个数,确定出TBS_L1,并将该TBS_L1乘以6得到的值作为第二中间值;
    若所述第二中间值大于375448,将所述第二中间值确定为该子帧对应的TBS值;
    若所述第二中间值小于或等于375448,且大于305976,3GPP Release12协议中定义的表示四层传输的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS 值;
    否则,将3GPP Release12协议中定义的表示TBS_L1与TBS_L4之间的映射关系的传输块大小映射表中,小于或等于所述第二中间值且与所述第二中间值的差值最小的TBS_L4,确定为该子帧对应的TBS值。
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