Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

• the present invention relates to the field of communications technologies, and in particular, to a signal transmission method and apparatus. Background technique
• NCT Carrier Aggregation
• CRS Cell-specific Reference Signals
• UE user equipment
• DRS/UE-RS dedicated reference signals
• the peak rate of the system is greatly improved compared to the Long Term Evolution (LTE) system, which requires downlink lGbps and uplink 500 Mbps. Therefore, the LTE-A system needs to expand the available bandwidth of the user equipment, that is, to aggregate multiple consecutive or discontinuous carriers under the same evolved base station (eNB), and simultaneously serve the UE to provide the required rate, as shown in the figure. 1 is shown. These aggregated carriers are also called Component Carriers (CCs). Each cell can be a member carrier, and cells (member carriers) under different eNBs cannot be aggregated. In order to ensure that UEs in the LTE system can work on each aggregated carrier, each carrier does not exceed 20 MHz at most.
• CCs Component Carriers
• the synchronization signals in the LTE system are described as follows:
• the synchronization signal includes a Primary Synchronized Signal (PSS) and a Secondary Synchronization Signal (SSS).
• PSS Primary Synchronized Signal
• SSS Secondary Synchronization Signal
• the PSS has three sequences, which are transmitted every 5 milliseconds (Millisecond, ms), and the sequences transmitted in the first two frames are the same to obtain 5ms timing.
• the SSS is interleaved by two binary sequences of length 31, and is scrambled by the scrambling sequence indicated by the PSS.
• the interleaving mode is different in the first two frames to obtain the 10 ms timing, that is, the timing start position of the radio frame is determined.
• PSS and SSS In the frequency domain, PSS and SSS only occupy 72 subcarrier transmissions in the center of each CC band (actually only on 62 subcarriers, and the remaining 10 subcarriers serve as guard intervals from other data).
• PSS and SSS In the time domain, for frame structure type 1, that is, the radio frame structure in the Frequency Division Duplex (FDD) system, PSS and SSS are the last and second to last in slot 0 and slot 10, respectively.
• FDD Frequency Division Duplex
• the subframe 1 is a special subframe, including a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS), and the subframe 6 is only In the 5 ms downlink-uplink switching point, the TDD uplink/downlink configuration is a special subframe, and the subframe 6 is a normal downlink subframe in the TDD uplink/downlink configuration of the 10 ms downlink-uplink switching point, and the SSS is in the slot 1 and
• the last OFDM symbol of the time slot 11 is transmitted, as shown in FIG. 2 and FIG. 3, which are respectively a schematic diagram of the FDD system synchronization signal mapping position and the TDD system synchronization signal mapping position, where Nc is the number of subcarriers in
• the DRS in the LTE-A system is described as follows:
• the LTE-A system defines nine downlink transmission modes, and the transmission mode of the UE is configured by higher layer signaling.
• the DRS is only transmitted on the physical resource block (PRB) of the transmission mode 7 ⁇ 9, and
• the DRS mapping position on the antenna port 7/8/11/13 is the same, and the DRS mapping positions on the antenna port 9/10/12/14 are the same, and are distinguished by the orthogonal sequence in Table 1 and Table 2 below to reduce Reference signal overhead, energy saving, and reduction of inter-neighbor interference.
• Cyclic Prefix CP
• DRS only supports transmission at antenna ports 7, 8. See Figure 4 to Figure 7, where Figure 4 is under normal CP.
• FIG. 5 is a DRS resource map of antenna port 5 under extended CP
• Figure 6 is a DRS resource map of antenna ports 7, 8, 9, 10 under conventional CP
• Figure 7 is an extended CP DRS resource map of the lower antenna ports 7, 8.
• the new carrier types in the LTE-A system are described as follows:
• LTE-A Rel-11 determines to introduce new carrier types to enhance system spectrum utilization, better support heterogeneous networks, and reduce power consumption.
• the working scheme for the new carrier type is under discussion.
• the current conclusions include: Support for CRS transmission with a period of 5ms on antenna port 0; Cannot work independently, with a legacy member carrier or legacy cell (inherited member carrier or legacy cell, That is, the component carrier or cell defined in the system of the previous version of Rel-11, such as the member carrier or cell with the corresponding version function and feature defined in the Rel-8, Rel-9, and Rel-10 systems; Whether the terminal has a certain deviation from the legacy carrier in the time domain and the frequency domain is divided into a synchronous carrier and an asynchronous carrier, and the latter needs to perform separate time-frequency synchronization processing.
• legacy member carrier or legacy cell inherited member carrier or legacy cell, That is, the component carrier or cell defined in the system of the previous version of Rel-11, such as the member carrier or cell with the corresponding version function and feature defined in the
• the downlink receiving mode of the LTE-A system is as follows:
• frame structure type 1 In a subframe in which the physical downlink control channel (PDCCH) of the normal CP occupies 4 OFDM symbols, the UE does not receive the PDSCH at the antenna port 5; if one of the two PRBs is in In the frequency domain, the physical broadcast CHannel (PBCH) or PSS/SSS resources overlap in the same subframe, and the UE does not on the antenna port 5, 7, 8, 9, 10, 11, 12, 13 or 14.
• PBCH physical downlink control channel
• PSS/SSS resources overlap in the same subframe, and the UE does not on the antenna port 5, 7, 8, 9, 10, 11, 12, 13 or 14.
• the PDSCH is received at the two PRBs; if the virtual resource block (VRB) resource allocation is used, the UE does not receive the PDSCH at the antenna port 7; if the UE does not receive all the resource blocks corresponding to the PDSCH (Resource Block , RB), the UE may skip decoding the transport block (TB), and if so, the physical layer will notify the upper layer that the TB has not successfully decoded.
• VRB virtual resource block
• the UE does not receive the PDSCH at the antenna port 5; if one of the two PRBs overlaps with the PBCH resource in the same subframe in frequency The UE does not carry the PDSCH carried by the two PRBs of the antenna port 5; if one of the two PRBs is aliased in the same subframe in the frequency domain and the resources occupied by the PSS or the SSS, the UE is at the antenna port 7, 8, 2, 10, 11, 12, 13 or 14 will not receive PDSCH in these two PRBs; in the normal CP configuration, in the special subframes using configurations 1 and 6, if discrete VRB resource allocation is used, The UE does not receive the PDSCH at the antenna port 5; if the discrete VRB resource allocation is used, the UE does not receive the PDSCH at the antenna port 7; if the UE does not receive all the RBs corresponding to the PDSCH, the
• the DRS on the carrier of the new carrier type, in the subframe in which the DRS overlaps with the PSS/SSS, the DRS cannot be transmitted on the 6 RBs where the intermediate 72 subcarriers carrying the PSS/SSS are located, therefore, The PDSCH demodulated based on DRS cannot be transmitted in these RBs, thereby reducing the downlink transmission of the new carrier type. effectiveness.
• the embodiment of the invention provides a signal transmission method and device, so as to avoid overlapping of the synchronization signal and the reference signal, and ensure the normal time-frequency synchronization of the carrier, and can normally transmit the reference signal, ensure tracking performance and improve downlink data transmission efficiency.
• the user equipment UE determines a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier And/or the frequency domain resources used to transmit the synchronization signal on the carrier are different from the frequency domain resources used to transmit the downlink reference signal on the carrier;
• the UE detects a synchronization signal on the carrier according to a time domain resource and a frequency domain resource on the carrier for transmitting a synchronization signal.
• the base station determines a time domain resource and a frequency domain resource for transmitting the synchronization signal on the carrier, where the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier, and / or the frequency domain resource used for transmitting the synchronization signal on the carrier is different from the frequency domain resource used for transmitting the downlink reference signal on the carrier;
• the base station transmits a synchronization signal on the time domain resource and the frequency domain resource for transmitting the synchronization signal on the carrier.
• a synchronization signal resource location determining unit configured to determine a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource for transmitting the synchronization signal on the carrier and the downlink reference for transmitting on the carrier.
• the time domain resources of the signals are different, and/or the frequency domain resources used to transmit the synchronization signals on the carrier are different from the frequency domain resources used to transmit the downlink reference signals on the carrier;
• the synchronization signal detecting unit is configured to detect a synchronization signal on the carrier according to a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier.
• a synchronization signal resource location determining unit configured to determine a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource for transmitting the synchronization signal on the carrier and the downlink reference for transmitting on the carrier.
• the time domain resources of the signals are different, and/or the frequency domain resources used to transmit the synchronization signals on the carrier are different from the frequency domain resources used to transmit the downlink reference signals on the carrier;
• a synchronization signal sending unit configured to transmit time domain resources and frequency domain resources for transmitting synchronization signals on the carrier Send a sync signal.
• the user equipment UE determines a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource used for transmitting the synchronization signal on the carrier and the downlink reference signal used for transmitting the downlink reference signal on the carrier.
• the time domain resources are different, and/or the frequency domain resources used for transmitting the synchronization signal on the carrier are different from the frequency domain resources used for transmitting the downlink reference signal on the carrier; the user equipment UE is used for transmission synchronization according to the carrier.
• the time domain resource and the frequency domain resource of the signal detect the synchronization signal on the carrier, thereby avoiding the synchronization signal and the reference signal overlapping, and ensuring the normal time-frequency synchronization of the carrier, the reference signal can be normally transmitted, and the tracking performance is improved and improved.
• FIG. 1 is a schematic diagram of a carrier aggregation system
• Figure 2 is a schematic diagram of the position of the synchronization signal mapping of the FDD system
• Figure 3 is a schematic diagram of the location of the synchronization signal mapping of the TDD system
• FIG. 5 is a DRS resource map of the antenna port 5 under the extended CP
• FIG. 8 is a schematic flowchart diagram of a signal receiving method according to an embodiment of the present disclosure.
• FIG. 9 is a schematic flowchart diagram of a signal sending method according to an embodiment of the present disclosure.
• FIG. 10 is a schematic structural diagram of a signal receiving apparatus according to an embodiment of the present disclosure.
• FIG. 11 is a schematic structural diagram of a signal sending apparatus according to an embodiment of the present invention. detailed description
• the embodiment of the invention provides a signal transmission method and device, so as to avoid overlapping of the synchronization signal and the reference signal, and ensure the normal time-frequency synchronization of the carrier, and can normally transmit the reference signal, ensure tracking performance and improve downlink data transmission efficiency.
• the technical solution provided by the embodiment of the present invention can be applied to signal transmission on an NCT carrier, and can also be applied to signal transmission on other carriers.
• the synchronization signal is transmitted in the time domain or the frequency domain position that does not overlap with the downlink reference signal, and configuring the tracking reference signal to be transmitted in the subframe where the asynchronous signal is transmitted, thereby ensuring the normal time-frequency synchronization of the NCT carrier.
• Normal transmission of reference signals ensures tracking performance and improves downlink data transmission efficiency.
• a signal receiving method provided by an embodiment of the present invention includes:
• the UE determines a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier. , and / or The frequency domain resource used for transmitting the synchronization signal on the carrier is different from the frequency domain resource used for transmitting the downlink reference signal on the carrier;
• the UE detects a synchronization signal on the carrier according to a time domain resource and a frequency domain resource used to transmit a synchronization signal on the carrier.
• the time domain resource is specifically:
• the OFDM symbol is: the frequency domain resource is specifically: a subcarrier or an RB or a resource element (Resource Element, RE) where the signal is transmitted.
• the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier, and/or the frequency domain resource used for transmitting the synchronization signal on the carrier
• the frequency domain resources used to transmit the downlink reference signal on the carrier are different, including:
• the subframe for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking, and/or the frequency domain resource for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking.
• the signal receiving method may include:
• Step 1 The UE determines a time domain and/or a frequency domain location where the synchronization signal transmission on the NCT is located, where the time domain and the frequency domain location are pre-agreed by the user equipment and the base station, where there is no downlink reference signal transmission, and the synchronization There is no tracking downlink reference signal transmission in the subframe where the signal is transmitted or in the frequency domain position;
• Step 2 The UE determines a transmission subframe and a frequency domain resource for tracking the downlink reference signal on the NCT carrier, where the subframe is not the subframe where the synchronization signal is transmitted, and/or the frequency domain resource does not include the synchronization signal transmission. Frequency domain location; Step 3: The UE detects the synchronization signal in the time-frequency domain position where the synchronization signal is transmitted, and detects the downlink reference signal for tracking in the transmission subframe of the downlink reference signal for tracking.
• the frequency domain resource used for transmitting the synchronization signal on the carrier is:
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• PSS and SSS are transmitted on adjacent OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located advances the OFDM symbol in which the PSS is located in the time domain; and/or,
• the OFDM symbol in which the PSS is located and the OFDM symbol in which the SSS is located are separated by two OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located is transmitted in the OFDM symbol in which the PSS is located in the time domain.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• PSS is in subframe 1 and subframe. 2nd OFDM in 6 Transfer on the symbol; or,
• SSS is transmitted on the first OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the fourth OFDM symbol in subframe 0 and subframe 5;
• special subframe configuration 1 For frame structure type 2: Under normal cyclic prefix CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and Special subframe configuration 8: SSS is transmitted on the 2nd OFDM symbol in subframe 1 and subframe 6, and PSS is transmitted on the 5th OFDM symbol in subframe 1 and subframe 6, or SSS is in subframe 1 and sub The fifth OFDM symbol in frame 6 is transmitted, and the PSS is transmitted on the eighth OFDM symbol in subframe 1 and subframe 6; or
• special subframe configuration 1 For frame structure type 2: Under extended CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 5, and special subframe configuration 6: SSS in subframe 1 and subframe 6 In the first OFDM symbol, the PSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, or the SSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, and the PSS is Transmission on the 7th OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the last 3rd OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• the PSS is transmitted on the fourth OFDM symbol in subframe 1 and subframe 6.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the SSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6; or, the SSS is the first in subframe 1 and subframe 6.
• the OFDM symbols are transmitted on the OFDM symbol, and the PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6.
• the time domain resource definition manner may be valid only for the frame structure type 2, or may be valid only for the frame structure type 1, or valid for the frame structure types 1 and 2, that is, the agreed frame structure types 1 and 2 use the same.
• the time domain resource transmits a synchronization signal.
• the downlink reference signal includes at least a DRS, and may further include a cell-specific reference signal (CRS), a positioning reference signal (PRS), and a channel state information reference signal (Channel State).
• CRS cell-specific reference signal
• PRS positioning reference signal
• Channel State channel state information reference signal
• CSI-RS One or more combinations of Information- Reference Signal, CSI-RS.
• the tracking downlink reference signal includes at least a CRS, and may further include a PRS, a CSI-RS.
• a CRS C-RNTI
• CSI-RS CSI-RS
• the tracking downlink reference signal is transmitted at equal intervals in the frequency domain; the transmission subframe is not the subframe in which the synchronization signal is transmitted, or the transmission subframe includes the subframe in which the synchronization signal is transmitted, and is in synchronization.
• the frequency domain resource does not include the frequency domain resource where the synchronization signal is transmitted.
• the RB where the downlink reference signal transmission is used does not include the RB where the synchronization signal is transmitted;
• the transmission subframe is not the subframe in which the synchronization signal is transmitted, and the frequency domain resource is all RBs in the NCT carrier frequency band, that is, all the RBs in the NCT carrier frequency band are transmitted;
• the transmission subframe and/or the frequency domain resource of the tracking downlink reference signal is pre-agreed by the user equipment and the base station, or is the downlink reference signal for tracking according to the high layer signaling/PDCCH signaling.
• the configuration information includes at least information for indicating/obtaining a transmission subframe and/or a frequency domain resource of the downlink reference signal for tracking;
• the synchronization signal comprises PSS and/or SSS;
• the time domain position of the synchronization signal transmission includes a subframe/time slot and an OFDM symbol position
• the frequency domain location of the synchronization signal transmission may be:
• TDD subcarriers may require 7 ⁇ 8 RBs
• the frequency domain position is A: the time domain position can follow the synchronization signals in Rel-8 and Rel-9 and Rel-10 Time domain location, or, you can also swap the time domain locations of PRS and SSS in Rel-8 and Rel-9 and Rel-10 to avoid The Rel-8 and Rel-9 and Rel-10 UEs are searched for the carrier, and it can be ensured that the UE camping on the NCT carrier can identify the carrier type (for the NCT carrier or Rel-8/9/10 carrier):
• FDD Frame Structure Type 1
• PSS is transmitted on slot 0 of the radio frame and the last OFDM symbol of slot 10
• SSS is in slot 0 of one radio frame and the penultimate OFDM of slot 10 Or on the symbol; or, the SSS is transmitted on the last OFDM symbol of slot 0 and slot 10 in one radio frame, and the PSS is on slot 0 of the radio frame and the penultimate OFDM symbol of slot 10 Transmission
• Frame Structure Type 2 (TDD): The PSS is transmitted on the third OFDM symbol of subframe 1 and subframe 6 in one radio frame, and the SSS is on the last OFDM symbol of slot 1 and slot 11 in one radio frame. Or transmitting; or, the SSS is transmitted on the third OFDM symbol of the subframe 1 and the subframe 6 in one radio frame, and the PSS is transmitted on the last OFDM symbol of the slot 1 and the slot 11 in one radio frame;
• different synchronization signal transmission time domain positions that is, different subframes or time slots and OFDM symbols, may also agree on the same time domain position, that is, the same subframe or time slot and OFDM symbol.
• the relative positions of the PSS and SSS defined in Rel-8 and Rel-9 and Rel-10 are not changed, ie: for frame structure type 1: PSS and SSS are transmitted on adjacent OFDM symbols, and SSS Transfer before PSS; for example: convention,
• Method A The SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6, or
• Method B The SSS is transmitted on the first OFDM symbol in subframes 0 and 5, and the PSS is transmitted on the second OFDM symbol in subframes 0 and 5, or
• Method C The SSS is transmitted on the second OFDM symbol in subframes 0 and 5, and the PSS is transmitted on the third OFDM symbol in subframes 0 and 5, or
• Method D The SSS is transmitted on the third OFDM symbol in subframes 0 and 5, and the PSS is transmitted on the fourth OFDM symbol in subframes 0 and 5.
• the synchronization signal transmission subframe and the tracking downlink reference signal transmission partner are agreed.
• the above methods, B, C, and D can be used if the frames are different or there is no tracking downlink reference signal transmission on the NCT carrier. Otherwise, when there is a tracking downlink reference signal in the synchronization signal transmission subframe, only the above method is applicable. Hey.
• PSS and SSS are separated by two OFDM symbols, and SSS is transmitted before PSS; for example: convention,
• Method E Only the special subframe configuration 1, the special subframe configuration 2, the special subframe configuration 3, the special subframe configuration 4, the special subframe configuration 6, the special subframe configuration 7, and the special subframe configuration 8 convention are performed under the regular CP.
• the SSS is transmitted on the second OFDM symbol in the subframe 1 and the subframe 6, and the PSS is transmitted on the fifth OFDM symbol in the subframe 1 and the subframe 6.
• the SSS is transmitted on the 5th OFDM symbol in the subframe 1 and the subframe 6, and the PSS is transmitted on the 8th OFDM symbol in the subframe 1 and the subframe 6, and the special subframe is configured only under the extended CP.
• Special subframe configuration 2, special subframe configuration 3, special subframe configuration 5, and special subframe configuration 6 convention: SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and PSS is in subframe 1 and subframe.
• the fourth OFDM symbol is transmitted on the sixth OFDM symbol, or the SSS is transmitted on the fourth OFDM symbol in subframe 1 and subframe 6, and the PSS is transmitted on the seventh OFDM symbol in subframe 1 and subframe 6; ,
• Method F Under normal CP, for all special subframe configurations, SSS is transmitted on the last 3rd OFDM symbol in subframe 0 and subframe 5, and PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6. Under the extended CP, for all special subframe configurations, the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the PSS is transmitted on the fourth OFDM symbol in subframe 1 and subframe 6; or
• Method G Under the conventional CP and the extended CP, the SSS is transmitted on the third last OFDM symbol in the subframe 0 and the subframe 5, and the PSS is transmitted on the first OFDM symbol in the subframe 1 and the subframe 6;
• the foregoing methods £, F, and G are only applicable to the case where there is no downlink reference signal for tracking in the synchronization signal transmission subframe (for example, CRS transmitted on the antenna port 0 in a period of 5 ms), that is, the NCT carrier. It is stipulated that the synchronization signal transmission subframe and the tracking downlink reference signal transmission subframe are different or there is no tracking downlink reference signal transmission on the NCT carrier.
• the synchronization signal transmission subframe and the tracking downlink reference signal transmission subframe are different or there is no tracking downlink reference signal transmission on the NCT carrier.
• At least one synchronization signal is in a DwPTS special subframe (ie, subframe 1 in a TDD uplink/downlink configuration of a 10 ms downlink-uplink switching point, or a TDD uplink/downlink configuration of a 5 ms downlink-uplink switching point) Transmission in subframe 1 and subframe 6); different subframes in different special subframe configurations have different synchronization signal transmission time domain positions, for example, available OFDM in each special subframe configuration given below a symbol number set, an OFDM symbol is selected as a symbol of a transmission synchronization signal in the DwPTS in the special subframe configuration; or, a special subframe configuration/conventional synchronization signal transmission time domain position may be configured for all special subframe configurations, For example, one OFDM symbol is selected among the available OFDM symbol sets common to each special subframe configuration as a symbol of the transmission synchronization signal in the DwPTS in all special subframe configurations;
• the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the SSS is in subframe 1 and subframe.
• the second OFDM symbol is transmitted on the second OFDM symbol, or the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6;
• different synchronization signal transmission time domain positions may be respectively agreed for the regular CP and the extended CP, that is, the OFDM symbols are selected for transmitting the synchronization signal in the available OFDM symbol sets under the regular CP and the extended CP, respectively.
• the same synchronization signal transmission time domain position may be agreed for the regular CP and the extended CP, that is, the OFDM symbol is selected from the set of available OFDM symbols common to the conventional CP and the extended CP for transmitting the synchronization signal;
• An OFDM symbol of the synchronization signal which is an OFDM symbol in which the non-DRS mapping is located;
• the shared available OFDM set includes: an OFDM symbol having the same number, or the same
• the OFDM symbol of the relative transmission position for example, the k1th or the k2th OFDM symbol in the subframe); preferably, the UE side further includes: when the UE has downlink data reception, the UE receives the downlink based on the DRS.
• the downlink data is transmitted on a resource unit (RE) for transmitting a synchronization signal and a resource unit (RE) other than a resource unit (RE) for transmitting a DRS in an RB in which the transmission is performed;
• the downlink data includes One or more combinations carried in PBCH, PHICH, PCFICH, PDSCH, PDCCH, and e-PDCCH (enhanced PDCCH), in particular, if there is PBCH transmission in the current subframe, Then, other downlink data (for example, PDSCH transmission) needs to be mapped on a resource unit (RE) other than the resource unit (RE) for transmitting the synchronization signal, the DRS, and the PBCH in the RB allocated by the downlink data transmission.
• a signal sending method provided by the embodiment of the present invention includes: an S20K base station determining a time domain resource and a frequency domain resource for transmitting a synchronization signal on a carrier, where the carrier is on the carrier
• the time domain resource for transmitting the synchronization signal is different from the time domain resource for transmitting the downlink reference signal on the carrier, and/or the frequency domain resource for transmitting the synchronization signal on the carrier and the downlink reference for transmitting on the carrier
• the frequency domain resources of the signal are different;
• the base station sends a synchronization signal on the time domain resource and the frequency domain resource used for transmitting the synchronization signal on the carrier.
• the time domain resource is specifically:
• the OFDM symbol is: the frequency domain resource is specifically: a subcarrier or an RB or an RE where the signal is transmitted.
• the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier, and/or the frequency domain resource used for transmitting the synchronization signal on the carrier
• the frequency domain resources used to transmit the downlink reference signal on the carrier are different, including:
• the subframe for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking, and/or the frequency domain resource for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking.
• the signaling method includes:
• Step 1 Determine a time domain and/or a frequency domain location where the synchronization signal transmission on the NCT is located, where the time domain and the frequency domain location are pre-agreed by the user equipment and the base station, where there is no downlink reference signal transmission, and the synchronization signal There is no tracking downlink reference signal transmission in the subframe in which the transmission is located or in the frequency domain position;
• Step 2 Determine a transmission subframe and a frequency domain resource for tracking the downlink reference signal on the NCT carrier, where the subframe is not a subframe in which the synchronization signal is transmitted, and/or the frequency domain resource does not include a frequency at which the synchronization signal is transmitted.
• the third location is: transmitting the synchronization signal in a time-frequency domain location where the synchronization signal is transmitted, and transmitting the downlink reference signal for tracking in a transmission subframe of the downlink reference signal for tracking.
• the frequency domain resource used for transmitting the synchronization signal on the carrier is:
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• PSS and SSS are transmitted on adjacent OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located advances the OFDM symbol in which the PSS is located in the time domain; and/or,
• the OFDM symbol in which the PSS is located and the OFDM symbol in which the SSS is located are separated by two OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located is transmitted in the OFDM symbol in which the PSS is located in the time domain.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6;
• SSS is transmitted on the first OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the fourth OFDM symbol in subframe 0 and subframe 5;
• special subframe configuration 1 For frame structure type 2: Under normal cyclic prefix CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and Special subframe configuration 8: SSS is transmitted on the 2nd OFDM symbol in subframe 1 and subframe 6, and PSS is transmitted on the 5th OFDM symbol in subframe 1 and subframe 6, or SSS is in subframe 1 and sub The fifth OFDM symbol in frame 6 is transmitted, and the PSS is transmitted on the eighth OFDM symbol in subframe 1 and subframe 6; or
• special subframe configuration 1 For frame structure type 2: Under extended CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 5, and special subframe configuration 6: SSS in subframe 1 and subframe 6 In the first OFDM symbol, the PSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, or the SSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, and the PSS is Transmission on the 7th OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the last 3rd OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• the PSS is transmitted on the fourth OFDM symbol in subframe 1 and subframe 6.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the SSS is in subframe 1 and subframe 6. Or transmitting on the second OFDM symbol; or, the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6.
• the tracking downlink reference signal includes at least a cell-specific reference signal CRS.
• the tracking downlink reference signal further includes one or more of the following signals: PRS, CSI-RS.
• the downlink reference signal includes at least a DRS.
• the downlink reference signal further includes one or more of the following signals: CRS, PRS, CSI-RSo.
• the method further includes:
• downlink data is transmitted based on the DRS, wherein the downlink data is transmitted on resources other than the resources for transmitting the synchronization signal and the DRS in the RB where the transmission is located.
• the carrier is a carrier of a new carrier type.
• the tracking downlink reference signal further includes: a PRS and/or a CSI-RS.
• the transmission subframe and/or the frequency domain resource of the downlink reference signal for tracking are pre-agreed by the base station and the user equipment; or
• the base station notifies the user equipment of the configuration information of the tracking downlink reference signal by using the high layer signaling or the PDCCH signaling, where the configuration information includes at least a transmission subframe and/or a frequency for indicating or obtaining the downlink reference signal for tracking.
• the base station may simultaneously transmit the synchronization signal, the DRS, and the downlink data in the subframe, and map the downlink data to the RB in the allocated RB in the subframe.
• the foregoing downlink data transmission includes PBCH, PHICH, PCFICH, PDSCH, PDCCH, and e-PDCCH (enhanced PDCCH, that is, enhanced PDCCH transmitted in the data area) Transmission of one or more downlink channel combinations; in particular, if there is a PBCH transmission in the current subframe, other downlink data transmissions (such as PDSCH transmissions) need to be mapped in the RB allocated for the downlink data transmission for transmission.
• the synchronization signal, the DRS, and the resource unit (RE) other than the resource unit (RE) of the PBCH are examples of the PBCH.
• Embodiment 1 For frame structure type 1 or 2, a common synchronization signal transmission method is agreed, and is applicable to synchronization signal transmission in a regular subframe under a regular CP and an extended CP; for example:
• Case 1 When the configured or agreed CRS transmission subframe is different from the synchronization signal transmission subframe, or the configured or agreed CRS transmission subframe is the same as the synchronization signal transmission subframe, but the frequency domain resource of the CRS configuration does not include the synchronization signal transmission.
• the frequency domain resource is located, for example, the appointment synchronization signal is transmitted in subframes 0 and 5, the CRS configuration or convention is transmitted in subframes of non-subframes 0 and 5, or the CRS is also configured or agreed to transmit in subframes 0 and 5.
• the frequency domain resource is located, for example, the appointment synchronization signal is transmitted in subframes 0 and 5
• the CRS configuration or convention is transmitted in subframes of non-subframes 0 and 5
• the CRS is also configured or agreed to transmit in subframes 0 and 5.
• configured to transmit in the frequency domain outside the frequency domain where the synchronization signal is transmitted for example, 6 RB transmissions not in the middle of the system
• OFDM symbols numbered #0/1/2/3/6/7/8/9 or even numbers in the synchronization signal transmission subframe 1/2/3/4 OFDM symbols of time slots and odd time slots Any two symbols in the number are transmitted.
• the legacy PDCCH needs to be transmitted on the NCT (inherited PDCCH, that is, the PDCCH in the system of the previous version of Rel-11, such as Rel-8, Rel-9, Rel-10
• the PDCCH in the system when the PDCCH is transmitted in the control region of one downlink subframe, and the control region is generally the first 1-4 OFDM symbols in one subframe, the convention is #6/7/8/9. OFDM symbol, or any two of the 1/2/3/4 OFDM symbols of the odd time slot in the synchronization signal transmission subframe;
• OFDM symbols numbered #0/1/2/8, or 1/th of even time slots in the synchronization signal transmission subframe 2/3 OFDM symbols and any two symbols in the 1/4th OFDM symbol of the odd slot are transmitted.
• the legacy PDCCH needs to be transmitted on the NCT, the odd number in the synchronization signal transmission subframe is agreed. Transmission on the 1/4th OFDM symbol of the slot;
• OFDM symbols numbered #1/2/8 or the second and odd time slots in the synchronization signal transmission subframe Or transmitting on any two symbols of the third OFDM symbol.
• the legacy PDCCH needs to be transmitted on the NCT, it is agreed to transmit on the 2/3th OFDM symbol of the odd time slot in the synchronization signal transmission subframe.
• the OFDM symbol numbered #1/2/8 or the 2/3th of the even time slots in the synchronization signal transmission subframe may be agreed upon.
• OFDM symbol transmission preferably, when the legacy PDCCH needs to be transmitted on the NCT, only PDCCH transmission of up to 2 OFDM symbols is supported, and the transmission is scheduled to be transmitted on the OFDM symbol numbered #2/8.
• Embodiment 2 For frame structure type 2, a common synchronization signal transmission method is agreed for a regular subframe, and is applicable to synchronization signal transmission in a regular subframe under a regular CP and an extended CP, and the special subframe needs to be different.
• the special subframe configuration condition stipulates a synchronization signal transmission method; wherein, one of the PSS and the SSS may be agreed to transmit a synchronization signal in a normal subframe, such as SSS, and another synchronization signal, such as PSS, in a special subframe DwPTS ( Transfer in subframe 1 and subframe 6); for example:
• Case 1 When the configured or agreed CRS transmission subframe is different from the synchronization signal transmission subframe, or the configured or agreed CRS transmission subframe is the same as the synchronization signal transmission subframe, but the CRS configuration is outside the frequency domain position of the synchronization signal transmission.
• the SSS is scheduled to be transmitted in subframes 0 and 5, the PSS is transmitted in subframe 1 and subframe 6, or the PSS is transmitted in subframes 0 and 5, and the SSS is transmitted in subframe 1 and subframe 6,
• the CRS configuration is transmitted in subframes other than subframe 0, subframe 5, subframe 1 and subframe 6, or the CRS configuration is transmitted in subframe 0, subframe 5, subframe 1 and subframe 6 and is configured for synchronization signal transmission.
• Transmission in the frequency domain outside the frequency domain for example, 6 RB transmissions not in the middle of the system:
• Synchronization signal (for example, SSS) transmitted in a regular subframe: available in the corresponding condition in the above embodiment 1 for transmission Transmitting on any one of the OFDM symbols of the synchronization signal;
• Synchronization signals (such as PSS) transmitted in special subframes, under normal CP:
• Special subframe configuration 0 and special subframe configuration 5 OFDM symbols numbered #0/1/2 in subframe 1 and subframe 6 may be agreed, or 1/2/3 of subframe 1 and subframe 6
• the OFDM symbol is transmitted on any one of the OFDM symbols.
• the OFDM symbol numbered #2 in subframe 1 and subframe 6 is agreed, or in subframe 1 and subframe 6. Transmission on the third OFDM symbol;
• Special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and special subframe configuration 8 can be agreed in subframe 1 and subframe 6 is transmitted on any one of the OFDM symbols numbered #0/1/4/7/8.
• the convention is to be numbered in subframe 1 and subframe 6. Any one of the symbols of the #4/7/8 OFDM symbol is transmitted;
• Synchronization signals (such as PSS) transmitted in special subframes, extended under CP:
• Special subframe configuration 0 and special subframe configuration 4 OFDM symbols numbered #0/1/2 in subframe 1 and subframe 6 may be agreed, or 1/2/3 of subframe 1 and subframe 6
• the OFDM symbol is transmitted on any one of the OFDM symbols.
• the OFDM symbol numbered #2 in subframe 1 and subframe 6 is agreed, or in subframe 1 and subframe 6. Transmission on the third OFDM symbol;
• Special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 5, and special subframe configuration 6 Can be agreed to be numbered #0/1/2/3 in subframe 1 and subframe 6. Any one of the OFDM symbols is transmitted on any one of the OFDM symbols. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, any of the OFDM symbols numbered #2/3/6 in subframe 1 and subframe 6 is agreed. Transfer on 1 symbol;
• a synchronization signal (e.g., SSS) transmitted in a regular subframe: transmitted on any one of OFDM symbols of the OFDM symbol available for transmitting the synchronization signal in the corresponding condition in the above Embodiment 1;
• the synchronization signal (such as PSS) transmitted in the special subframe, which only supports the case of ports 7 ⁇ 14;
• a synchronization signal (e.g., SSS) transmitted in a regular subframe: transmitted on any one of OFDM symbols of the OFDM symbol available for transmitting the synchronization signal in the corresponding condition in the above Embodiment 1;
• Synchronization signals (such as PSS) transmitted in special subframes, under normal CP:
• Special subframe configuration 0 and special subframe configuration 5 OFDM symbols numbered #1/2 in subframe 1 and subframe 6, or 2/3 OFDM symbols in subframe 1 and subframe 6 Any one of the symbols is transmitted.
• the OFDM symbol numbered #2 in subframe 1 and subframe 6, or the third OFDM symbol of subframe 1 and subframe 6 is agreed.
• Transfer Special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and special subframe configuration 8 Can be agreed in subframe 1 and subframe
• the OFDM symbol numbered #8 in subframe 1 and subframe 6 is agreed to be transmitted on any one of the OFDM symbols numbered #1/8.
• the OFDM symbol numbered #8 in subframe 1 and subframe 6 is agreed.
• Synchronization signals transmitted in special subframes eg PSS
• extended CP e.g. PSS
• Special subframe configuration 0, special subframe configuration 1 and special subframe configuration 4 OFDM symbols numbered #1/2 in subframe 1 and subframe 6 may be agreed, or subframe 2 and subframe 2 may be 2/ Any one of the three OFDM symbols is transmitted.
• the OFDM symbol numbered #2 in subframe 1 and subframe 6 is agreed, or subframe 1 and subframe 6 are reserved. Transmission on the third OFDM symbol;
• the legacy PDCCH needs to be transmitted on the NCT, the convention is to be numbered in the subframe 1 and the subframe 6 Transmission on any one of the #2/7 OFDM symbols;
• a synchronization signal (e.g., SSS) transmitted in a regular subframe: transmitted on any one of OFDM symbols of the OFDM symbol available for transmitting the synchronization signal in the corresponding condition in the above Embodiment 1;
• Synchronization signals transmitted in special sub-frames eg PSS
• conventional CP Same as port 7 ⁇ 14 only
• Synchronization signals transmitted in special sub-frames (eg PSS) extended CP:
• OFDM symbols numbered #1/2 in subframe 1 and subframe 6 can be agreed Or, transmit any one of the 2/3 OFDM symbols of the subframe 1 and the subframe 6.
• the convention is to be numbered in the subframe 1 and the subframe 6. 2 OFDM symbols, or transmissions on subframe 3 and subframe 3 of the third OFDM symbol;
• Special subframe configuration 3 and special subframe configuration 6 It can be agreed to transmit on any one of the OFDM symbols numbered #1/2/8 in subframe 1 and subframe 6, preferably, on NCT When the legacy PDCCH needs to be transmitted, it is agreed to transmit on any one of the OFDM symbols numbered #2/8 in subframe 1 and subframe 6;
• Embodiment 3 For frame structure type 2, it is agreed to transmit one of PSS and SSS in a regular subframe, such as SSS, another synchronization signal, such as PSS, in special subframe DwPTS (ie, subframe 1 and subframe) 6, 10ms downlink-uplink switching point TDD uplink/downlink configuration, subframe 1 includes DwPTS, 5 ms downlink-uplink switching point TDD uplink/downlink configuration, subframe 1 and subframe 6 both contain DwPTS) transmission, Conversely, a common synchronization signal transmission method is agreed for the case where the regular subframe and the special subframe include and do not include the CRS transmission, for example: When only the DRS transmission on the antenna ports 7 to 14 is supported on the NCT:
• a synchronization signal is transmitted in the second or third OFDM symbol in slot 1 and slot 11 in a radio frame Lose
• Special subframe configuration 0 and special subframe configuration 4 (only under extended CP) /5: 3rd OFDM symbol transmission in subframe 1 and subframe 6; special subframe configuration 1/2/3/4 (only in Under normal CP) /6/7/8: 2nd OFDM symbol transmission in subframe 2 and subframe 2 of the second slot (ie, OFDM symbol numbered #8 under regular CP, number # under extended CP) 7 OFDM symbols); or,
• Special subframe configuration 0 and special subframe configuration 4 (only under extended CP) /5/7 (only under extended CP) /8 (only under extended CP): 3rd in subframe 1 and subframe 6 OFDM symbol transmission; special subframe configuration 1/2/3/4 (only under regular CP) 16 gates (only under regular CP) /8 (only under regular CP): in subframe 1 and subframe 6 2nd OFDM symbol transmission of 2 slots;
• a synchronization signal is transmitted on OFDM symbols of number #8 in subframes 0 and 5 in a radio frame (ie, under the normal CP, in the second OFDM symbol transmission of slots 1 and 11, extended CP, at the time) 3rd OFDM symbol transmission of slots 1 and 11);
• DwPTS subframe 1 and subframe 6, 10 ms downlink-uplink switching point TDD uplink/downlink configuration
• subframe 1 contains DwPTS
• both subframe 1 and subframe 6 contain the transmission in DwPTS:
• Special subframe configuration 0 and special subframe configuration 4 (only extended CP) /5: 3rd OFDM symbol transmission in subframe 1 and subframe 6; special subframe configuration 1/2/3/4 under regular CP /6 and special subframe configuration 7/8 under regular and extended CP: 2nd OFDM symbol transmission in the 2nd slot of subframe 1 and subframe 6; special subframe configuration 1/2/ under extended CP 3/6: transmission of the third OFDM symbol in the second slot of subframe 1 and subframe 6;
• special subframe configuration 0 and special subframe configuration 4 (only extended CP) /5/7 (only extended CP) /8 (only extended CP): 3rd OFDM in subframe 1 and subframe 6 Symbol transmission; special subframe configuration under normal CP 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and special subframe configuration 8: The second OFDM symbol transmission of the second slot of subframe 1 and subframe 6; the special subframe configuration 1/2/3/6 under the extended CP: in the second slot of subframe 1 and subframe 6 The third OFDM symbol transmission.
• Embodiment 4 For frame structure types 1 and 2, or only for frame structure type 2, it is agreed that both PSS and SSS are transmitted on the first and second OFDM symbols in subframe 1 and subframe 6, and the PSS may be in the first or Transmission on the second OFDM symbol; ensure that the CRS transmission subframe on the NCT is not subframe 1 and subframe 6, or when the CRS transmission subframe is subframe 1 and subframe 6, it is necessary to ensure that the CRS transmission frequency domain resource is not included.
• the frequency domain resource of the synchronization signal transmission (that is, not transmitted in 6 RBs in the center of the NCT carrier frequency band); the scheme can support the DRS on the antenna ports 5, 7 ⁇ 14, and the PRS on the antenna port 6 and the synchronization signal in the same subframe. Simultaneous transmission;
• the available OFDM in the time domain adjacent or as close as possible should be selected as much as possible.
• the symbol is used to transmit two kinds of synchronization signals to improve the detection performance of the synchronization signal;
• the OFDM symbols for transmitting PSS and SSS can be agreed to be the same as above under different conditions; when the transmission of PRS is the same as CRS in case 2, the OFDM symbols that can further transmit PSS and SSS can not be included in the above different conditions.
• 3/4/5/6/7/8/9/10/11/12/13 OFDM symbols, that is, the OFDM symbols available at this time are only possible to be #0/1/2 OFDM symbols under the different conditions described above A common symbol of the available OFDM symbols.
• the following is a set of OFDM symbols that can be used to transmit a synchronization signal in different scenarios, where the OFDM symbol number starts from 0;
• the regular CP OFDM symbol numbered #0/1/2/3/4/7/8/9/10/11;
• the extended CP OFDM symbol numbered #0/1/2/3/6/7/8/9;
• a regular CP an OFDM symbol numbered #1/2/3/8/9/10;
• the extended CP the OFDM symbol numbered #1/2/7/8;
• Special subframe configuration 2 and special subframe configuration 7 OFDM symbols numbered #1/8/9;
• Special subframe configuration 3 and special subframe configuration 4 and special subframe configuration 8 OFDM symbols numbered #1/5/6/8;
• special subframe configuration 5 OFDM symbols numbered #1/2;
• the regular CP OFDM symbol numbered #0/1/2/4/7/8/10/11;
• the extended CP OFDM symbol numbered #0/1/2/3/6/8/9; #0/1/2/3/6/7/8/9 in the special subframe, regular CP:
• Special subframe configuration 1 and special subframe configuration 2 and special subframe configuration 6 and special subframe configuration 7 OFDM symbols numbered #0/1/4/7/8;
• Special subframe configuration 1 and special subframe configuration 2 and special subframe configuration 5 OFDM symbol numbered #0/1/2/3/6;
• a regular CP an OFDM symbol numbered #1/2/8/10;
• the extended CP the OFDM symbol numbered #1/2/8;
• Special subframe configuration 1 and special subframe configuration 2 and special subframe configuration 6 and special subframe configuration 7 OFDM symbol numbered #/1/8;
• Special subframe configuration 3 and special subframe configuration 4 and special subframe configuration 8 OFDM symbol numbered #1/5/8; special subframe configuration 5: OFDM symbol numbered #1/2;
• the extended CP Special subframe configuration 0, special subframe configuration 1, special subframe configuration 2, special subframe configuration 4, and special subframe configuration 5: OFDM symbol numbered #1/2
• a signal receiving apparatus includes:
• the synchronization signal resource location determining unit 11 is configured to determine a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource used for transmitting the synchronization signal on the carrier and the carrier are used for transmission downlink
• the time domain resources of the reference signal are different, and/or the frequency domain resources used to transmit the synchronization signal on the carrier are different from the frequency domain resources used to transmit the downlink reference signal on the carrier;
• the synchronization signal detecting unit 12 is configured to detect a synchronization signal on the carrier according to a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier.
• the time domain resource is specifically:
• the OFDM symbol is: the frequency domain resource is specifically: a subcarrier or an RB or an RE where the signal is transmitted.
• the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier, and/or the frequency domain resource used for transmitting the synchronization signal on the carrier
• the frequency domain resources used to transmit the downlink reference signal on the carrier are different, including:
• the subframe for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking, and/or the frequency domain resource for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking.
• the frequency domain resource used for transmitting the synchronization signal on the carrier is:
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• PSS and SSS are transmitted on adjacent OFDM symbols in the time domain, and the SSS is located
• the OFDM symbol is advanced in the time domain by the OFDM symbol in which the PSS is located; and/or,
• the OFDM symbol in which the PSS is located and the OFDM symbol in which the SSS is located are separated by two OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located is transmitted in the OFDM symbol in which the PSS is located in the time domain.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6;
• SSS is transmitted on the first OFDM symbol in subframe 0 and subframe 5
• PSS is in the sub-frame Transmission on the second OFDM symbol in frame 0 and subframe 5;
• SSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the fourth OFDM symbol in subframe 0 and subframe 5;
• special subframe configuration 1 For frame structure type 2: Under normal CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and special sub- Frame configuration 8: SSS is transmitted on the 2nd OFDM symbol in subframe 1 and subframe 6, and PSS is transmitted on the 5th OFDM symbol in subframe 1 and subframe 6, or SSS is in subframe 1 and subframe 6 In the fifth OFDM symbol, the PSS is transmitted on the eighth OFDM symbol in subframe 1 and subframe 6; or
• special subframe configuration 1 For frame structure type 2: Under extended CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 5, and special subframe configuration 6: SSS in subframe 1 and subframe 6 In the first OFDM symbol, the PSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, or the SSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, and the PSS is Transmission on the 7th OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the last 3rd OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• the PSS is transmitted on the fourth OFDM symbol in subframe 1 and subframe 6.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the SSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6; or, the SSS is the first in subframe 1 and subframe 6.
• the OFDM symbols are transmitted on the OFDM symbol, and the PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6.
• the tracking downlink reference signal includes at least a CRS.
• the downlink reference signal includes at least a DRS.
• the device further comprises:
• the downlink data receiving unit 13 is configured to receive downlink data based on the DRS when there is downlink data reception of the UE, where the downlink data is used for transmitting resources other than resources for transmitting the synchronization signal and the DRS in the RB where the transmission is located.
• the carrier is a carrier of a new carrier type.
• a signal sending apparatus provided by an embodiment of the present invention includes:
• the synchronization signal resource location determining unit 21 is configured to determine a time domain resource and a frequency domain resource for transmitting a synchronization signal on the carrier, where the time domain resource for transmitting the synchronization signal on the carrier and the downlink for transmitting on the carrier Reference signal
• the time domain resources are different, and/or the frequency domain resources used to transmit the synchronization signal on the carrier are different from the frequency domain resources used to transmit the downlink reference signal on the carrier;
• the synchronization signal transmitting unit 22 is configured to send a synchronization signal on the time domain resource and the frequency domain resource for transmitting the synchronization signal on the carrier.
• the time domain resource is specifically:
• the OFDM symbol is: the frequency domain resource is specifically: a subcarrier or an RB or an RE where the signal is transmitted.
• the time domain resource used for transmitting the synchronization signal on the carrier is different from the time domain resource used for transmitting the downlink reference signal on the carrier, and/or the frequency domain resource used for transmitting the synchronization signal on the carrier
• the frequency domain resources used to transmit the downlink reference signal on the carrier are different, including:
• the subframe for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking, and/or the frequency domain resource for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking.
• the frequency domain resource used for transmitting the synchronization signal on the carrier is:
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• PSS and SSS are transmitted on adjacent OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located advances the OFDM symbol in which the PSS is located in the time domain; and/or,
• the OFDM symbol in which the PSS is located and the OFDM symbol in which the SSS is located are separated by two OFDM symbols in the time domain, and the OFDM symbol in which the SSS is located is transmitted in the OFDM symbol in which the PSS is located in the time domain.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6;
• SSS is transmitted on the first OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5;
• SSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5
• PSS is transmitted on the fourth OFDM symbol in subframe 0 and subframe 5;
• special subframe configuration 1 For frame structure type 2: Under normal CP, for special subframe configuration 1, special subframe configuration 2, special subframe Configuration 3, special subframe configuration 4, special subframe configuration 6, special subframe configuration 7 and special subframe configuration 8: SSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6, and PSS is in subframe 1 And transmitting on the 5th OFDM symbol in subframe 6, or SSS is transmitted on the 5th OFDM symbol in subframe 1 and subframe 6, and PSS is transmitted on the 8th OFDM symbol in subframe 1 and subframe 6. Or,
• special subframe configuration 1 For frame structure type 2: Under extended CP, for special subframe configuration 1, special subframe configuration 2, special subframe configuration 3, special subframe configuration 5, and special subframe configuration 6: SSS in subframe 1 and subframe 6 In the first OFDM symbol, the PSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, or the SSS is transmitted on the 4th OFDM symbol in subframe 1 and subframe 6, and the PSS is Transmission on the 7th OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the last 3rd OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6; or
• the SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6
• the PSS is transmitted on the fourth OFDM symbol in subframe 1 and subframe 6.
• the time domain resource used for transmitting the synchronization signal on the carrier is:
• the PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and the SSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6; or, the SSS is the first in subframe 1 and subframe 6.
• the OFDM symbols are transmitted on the OFDM symbol, and the PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6.
• the tracking downlink reference signal includes at least a CRS.
• the downlink reference signal includes at least a DRS.
• the device further comprises:
• the downlink data sending unit 23 is configured to send downlink data based on the DRS when there is downlink data to be transmitted, where the downlink data is uploaded in a resource other than the resource for transmitting the synchronization signal and the DRS in the RB where the transmission is performed.
• the carrier is a carrier of a new carrier type.
• the embodiment of the present invention provides a time-frequency domain location design for carrier-synchronous signal transmission, and a mapping relationship between a downlink reference signal for limiting tracking and a synchronization signal, a synchronization signal transmission mode on the carrier, and a downlink reference for tracking.
• the appointment synchronization signal is transmitted in a time domain and/or a frequency domain position that does not overlap with the downlink reference signal, and configures or stipulates a subframe for tracking reference signal transmission without synchronization signal.
• the medium frequency transmission or the frequency domain transmission resource does not include the frequency domain resource where the synchronization signal transmission is located, and the synchronization signal is prevented from overlapping with the reference signal such as CRS/DRS, so that the reference signal can be normally transmitted on the basis of ensuring the normal synchronization of the NCT carrier. Guarantee tracking performance and improve downlink transmission efficiency of NCT carriers.
• embodiments of the present invention can be provided as a method, system, or computer program product.
• the present invention can be implemented in terms of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
• the present invention is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
• 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 such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
• the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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