WO2013155978A1

WO2013155978A1 - Method and apparatus for signal transmission

Info

Publication number: WO2013155978A1
Application number: PCT/CN2013/074392
Authority: WO
Inventors: 高雪娟; 林亚男; 沈祖康
Original assignee: 电信科学技术研究院
Priority date: 2012-04-20
Filing date: 2013-04-19
Publication date: 2013-10-24
Also published as: CN103379072A; CN103379072B

Abstract

The present invention discloses a method and apparatus for signal transmission, thus the overlap of synchronization signals and reference signals can be avoided. While the normal time-frequency synchronization of carriers is ensured, the reference signals can be transmitted normally, so that the tracking performance is ensured and the transmission efficiency of downlink data is improved. A method for receiving signals provided by the present invention comprises: an User Equipment (UE) determines the time-domain resources and frequency-domain resources on the carriers for transmitting the synchronization signals, wherein the time-domain resources on the carriers for transmitting the synchronization signals are different from those for transmitting the downlink reference signals, and/or the frequency-domain resources on the carriers for transmitting the synchronization signals are different from those for transmitting the downlink reference signals; UE detects the synchronization signals on the carriers according to the time-domain resources and frequency-domain resources on the carriers for transmitting the synchronization signals.

Description

The present invention claims the priority of a Chinese patent application filed on April 20, 2012 by the Chinese Patent Office, Application No. 201210119229.8, entitled "A Signal Transmission Method and Apparatus", the entire contents of which is incorporated herein by reference. This is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to a signal transmission method and apparatus. Background technique

Supporting new carrier types (Additional Carrier Type/New Carrier Type) in Long Term Evolution (Advanced) (LTE-A) Release 11 (Release 11) (Rel-11) Carrier Aggregation (CA) systems NCT) to improve frequency utilization and reduce power consumption. The NCT will transmit the tracking reference signals such as Cell-specific Reference Signals (CRS) for measurement and synchronization maintenance. There will also be user equipment (UE) dedicated reference signals (DRS/UE-RS). ) for downlink demodulation. On the other hand, when the NCT carrier is a non-synchronous carrier, it is necessary to transmit a synchronization signal for independent time-frequency synchronization.

In the LTE-A system, 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.

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). 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.

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). 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. Orthogonal Frequency Division Multiplexing, OFDM) symbolic transmission; for frame structure type 2, the radio frame structure in the Time Division Duplex (TDD) system, the PSS is transmitted on the third OFDM symbol of subframe 1 and subframe 6, where 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 band.

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. DRS is used to support signal demodulation in transmission mode Ί~9, supporting 1~8 antenna port transmission, respectively configured in antenna port Ρ ^{= 5} , Ρ = P = 8 or Ρ = 7,8,...,υ+6 "" is the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH M dedicated layer number. 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. Under 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. DRS resource map of antenna port 5; Figure 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. Antenna (0) ^(1) ^ (2) w _p port P

7 [" + 1 + 1 + 1]

8 [" -1 + 1 -l]

9 [" + 1 + 1 + 1]

10 [" - 1 + 1 -l]

11 [" + 1 - 1 -l]

12 [- 1 -1 + 1 + 1]

13 - 1 -1 + 1]

14 [- 1 + 1 + 1 -l] Table 1: DRS Orthogonal Sequences of Different Antenna Ports Under Conventional CP

Table 2: DRS Orthogonal Sequences for Different Antenna Ports Under Extended CP

The new carrier types in the LTE-A system are described as follows:

In order to further improve system resource utilization, 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.

The downlink receiving mode of the LTE-A system is as follows:

For 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. 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.

For frame structure type 2: In a subframe in which the PDCCH of the regular CP occupies 4 OFDM symbols, 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 UE may skip decoding the TB if In this way, the physical layer will notify the upper layer that the TB has not successfully decoded.

Based on the above FDD and TDD resource mapping restrictions, 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.

In summary, the prior art has no specific solution for the transmission method of the synchronization signal and the reference signal on the NCT carrier. Summary of the invention

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.

A signal receiving method provided by an embodiment of the present invention includes:

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.

A signaling method provided by an embodiment of the present invention includes:

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 signal receiving apparatus provided by an embodiment of the present invention includes:

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 signal sending apparatus provided by an embodiment of the present invention includes:

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.

In the embodiment of the present invention, 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. Downlink data transmission efficiency. DRAWINGS

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;

4 is a DRS resource map of antenna port 5 under a conventional CP;

FIG. 5 is a DRS resource map of the antenna port 5 under the extended CP;

6 is a DRS resource map of antenna ports 7, 8, 9, and 10 under a conventional CP;

7 is a DRS resource map of antenna ports 7 and 8 under 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 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. By pre-arranging that 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.

The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

Referring to FIG. 8 , on the user equipment side, a signal receiving method provided by an embodiment of the present invention includes:

S101. 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;

S102. 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.

Preferably, the time domain resource is specifically:

a subframe in which the signal is transmitted and an OFDM symbol in the subframe; or a time slot in which the signal is transmitted, and an OFDM symbol in the time slot; or a subframe and a time slot in which the signal is transmitted, and the subframe and the time slot 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.

Preferably, 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.

For example, 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.

Preferably, the frequency domain resource used for transmitting the synchronization signal on the carrier is:

62 or 72 subcarriers in the center of the frequency band of the carrier except for the subcarrier in which the downlink reference signal is transmitted; or

There are consecutive 62 or 72 subcarriers in the center of the frequency band of the carrier.

Preferably, the time domain resource used for transmitting the synchronization signal on the carrier is:

For frame structure type 1: 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,

For the frame structure type 2: 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.

Preferably, the time domain resource used for transmitting the synchronization signal on the carrier is: For frame structure type 1: SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and PSS is in subframe 1 and subframe. 2nd OFDM in 6 Transfer on the symbol; or,

For frame structure type 1: SSS is transmitted on the first OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5; or

For frame structure type 1: SSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5; or

For frame structure type 1: SSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the fourth OFDM symbol in subframe 0 and subframe 5; or

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

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

For frame structure type 2: under a normal CP, 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

For frame structure type 2: Under the extended CP, 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.

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.

Preferably, 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). One or more combinations of Information- Reference Signal, CSI-RS.

Preferably, the tracking downlink reference signal includes at least a CRS, and may further include a PRS, a CSI-RS. One or more combinations.

Preferably, 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. In the subframe in which the signal transmission is located, the frequency domain resource does not include the frequency domain resource where the synchronization signal is transmitted. For example, the RB where the downlink reference signal transmission is used does not include the RB where the synchronization signal is transmitted;

Preferably, for the CRS, 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;

Preferably, 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. Obtained by the configuration information, 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;

Preferably, the synchronization signal comprises PSS and/or SSS;

Preferably, the time domain position of the synchronization signal transmission includes a subframe/time slot and an OFDM symbol position;

Preferably, the frequency domain location of the synchronization signal transmission may be:

A: 62 (for FDD) or 72 in the center of the NCT carrier band except for the subcarrier where the DRS is located (for

TDD ) subcarriers (may require 7~8 RBs); or,

B: consecutive 62 (for FDD) or 72 (for TDD) subcarriers (6 RBs) in the center of the NCT carrier band; for example: assuming that the synchronization signal sequence is ^«), the mapping of the synchronization signal to the transmission RE (t, /) Relationships can be expressed by the following formula:

k = n - 3 l + ^ ^sc

2

Where, n = 0,... , 61 represents the sequence length of the synchronizing signal, / represents an OFDM symbol synchronization signal transmission where the number, N downlink carriers NCT transmission bandwidth, expressed as a number of RB, N _S is one RB The number of subcarriers included in the frequency domain is generally 12, so N^N _s represents the total number of subcarriers included in the downlink transmission bandwidth of the NCT carrier, and = " _ 31 + ^sc indicates the 62 subcarriers in the center of the downlink transmission bandwidth of the NCT carrier. Number; special,

2

For TDD, the following 10 subcarrier reservations are specified (not used to transmit synchronization signals, nor to transmit other data):

2

« = -5 -4,... -1,62,63,...66 When 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):

Frame Structure Type 1 (FDD): 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;

When the frequency domain location is B:

For frame structure type 1 and frame structure type 2, 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. Preferably, 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.

When it is determined that there is no tracking downlink reference signal in the synchronization signal transmission subframe (for example, a CRS transmitted on the antenna port 0 in a period of 5 ms), 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.

For frame structure type 2: 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. Or, 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;

Preferably, 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.

For frame structure type 2, 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;

Preferably, 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;

For the regular subframe and the special subframe, 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. Alternatively, 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. Data, wherein 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.

Correspondingly, referring to FIG. 9, on the base station side, 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;

S202. 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. Preferably, the time domain resource is specifically:

a subframe in which the signal is transmitted and an OFDM symbol in the subframe; or a time slot in which the signal is transmitted, and an OFDM symbol in the time slot; or a subframe and a time slot in which the signal is transmitted, and the subframe and the time slot The OFDM symbol is: the frequency domain resource is specifically: a subcarrier or an RB or an RE where the signal is transmitted.

For example, 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.

62 or 72 sub-carriers in the center of the frequency band of the carrier except the sub-carrier where the downlink reference signal is transmitted Carrier; or

For frame structure type 1: SSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and PSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6; or

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.

Preferably, the tracking downlink reference signal includes at least a cell-specific reference signal CRS.

Preferably, the tracking downlink reference signal further includes one or more of the following signals: PRS, CSI-RS.

Preferably, the downlink reference signal includes at least a DRS.

Preferably, the downlink reference signal further includes one or more of the following signals: CRS, PRS, CSI-RSo. Preferably, the method further includes:

When there is downlink data to be transmitted, 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.

Preferably, the carrier is a carrier of a new carrier type.

Preferably, 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

And 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. Information about domain resources;

If there is still a downlink data transmission in the subframe in which the synchronization signal is transmitted, 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. And transmitting on the time-frequency domain resource other than the resource unit (RE) occupied by the DRS; 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.

A description of several specific embodiments is given below.

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. When 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. And 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):

When only the DRS transmission on antenna ports 7~14 is supported on the NCT carrier: 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. Preferably, when 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;

When DRS transmission on antenna ports 5, 7-14 is simultaneously supported on the NCT carrier: 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. Preferably, when 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;

Case 2: When the configured or agreed CRS transmission subframe is the same as the synchronization signal transmission subframe, and the CRS configuration is transmitted in the frequency domain location including the synchronization signal transmission:

When only the DRS transmission on antenna ports 7~14 is supported on the NCT: 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. Preferably, when 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. ;

When the DRS transmission on the antenna ports 5, 7~14 is simultaneously supported on the NCT: 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. For frequency domain transmission, for example, 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):

When only the DRS transmission on antenna ports 7~14 is supported on the NCT:

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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, 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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, 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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, 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;

When the DRS transmission on antenna ports 5 and 7-14 is supported on the NCT:

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;

Case 2: When the configured or agreed CRS transmission subframe is the same as the synchronization signal transmission subframe, and the CRS configuration is transmitted in the frequency domain position of the synchronization signal transmission:

When only the DRS transmission on antenna ports 7~14 is supported on the NCT:

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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, 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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, the OFDM symbol numbered #8 in subframe 1 and subframe 6 is agreed. Transfer

Synchronization signals transmitted in special subframes (eg PSS), extended CP:

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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, 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;

Special subframe configuration 2. Special subframe configuration 3. Special subframe configuration 5 and special subframe configuration 6: Can be contracted in subframe

1 and any one of the OFDM symbols numbered #1/2/7 in the subframe 6 is transmitted. Preferably, when 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;

When the DRS transmission on antenna ports 5 and 7-14 is supported on the NCT:

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:

Special subframe configuration 0, special subframe configuration 1, special subframe configuration 2, special subframe configuration 4, and special subframe configuration 5: 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. Preferably, when the legacy PDCCH needs to be transmitted on the NCT, 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

Another synchronization signal is transmitted in the special subframe DwPTS:

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;

When the DRS transmission on antenna ports 5 and 7-14 is supported on the NCT:

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);

Another type of synchronization signal is in the special subframe DwPTS (ie, subframe 1 and subframe 6, 10 ms downlink-uplink switching point TDD uplink/downlink configuration, subframe 1 contains DwPTS, 5 ms downlink-uplink switching point on TDD/ In the downstream configuration, 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;

Or, 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;

Preferably, for frame structure types 1 and 2, 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;

It should be noted that, if the PRS transmission is simultaneously considered in the above embodiments 1 to 4 (the PRS transmission on the antenna port 6 is simultaneously supported in the case 1 and the case 2 on the NCT), when the transmission of the PRS is the same as in the case 1 In CRS, 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;

When only the DRS transmission on antenna ports 7~14 is supported on the NCT carrier:

When the CRS transmission subframe is different from the synchronization signal transmission subframe:

In the regular subframe, the regular CP: OFDM symbol numbered #0/1/2/3/4/7/8/9/10/11;

In the regular subframe, the extended CP: OFDM symbol numbered #0/1/2/3/6/7/8/9;

In special subframes, regular CP:

Special subframe configuration 0: OFDM symbol numbered #0/1/2

Special subframe configuration 1/6: OFDM symbols numbered #0/1/4/7/8;

Special subframe configuration 2/7: OFDM symbols numbered #0/1/4/7/8/9;

Special subframe configuration 3/8: OFDM symbols numbered #0/1/4/5/6/7/8;

Special subframe configuration 4: OFDM symbols numbered #0/1/4/5/6/7/8/11;

Special subframe configuration 5: OFDM symbol numbered #0/1/2;

In special subframes, extend CP:

Special subframe configuration 0 and special subframe configuration 4: OFDM symbol numbered #0/1/2

Special subframe configuration 1 : OFDM symbol numbered #0/1/2/3/6;

Special subframe configuration 2 and special subframe configuration 5: OFDM symbols numbered #0/1/2/3/6/7;

Special subframe configuration 3 : OFDM symbols numbered #0/1/2/3/6/7/8/9;

Special subframe configuration 6: OFDM symbols numbered #0/1/2/3/6/7/8;

When the CRS transmission subframe is the same as the synchronization signal transmission subframe:

In a regular subframe, a regular CP: an OFDM symbol numbered #1/2/3/8/9/10;

In the regular subframe, the extended CP: the OFDM symbol numbered #1/2/7/8;

In special subframes, regular CP:

Special subframe configuration 0: OFDM symbol numbered #1/2

Special subframe configuration 1 and special subframe configuration 6: OFDM symbol numbered #/1/8;

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;

In special subframes, extend CP:

Special Subframe Configuration 0, Special Subframe Configuration 1 and Special Subframe Configuration 4: OFDM Symbol Special Subframe Configuration #2 and Special Subframe Configuration No. #1/2: OFDM Symbol Numbered #1/2/7 ;

Special subframe configuration 3 and special subframe configuration 6: OFDM symbols numbered #1/2/7/8;

When the DRS transmission on antenna port 5 and antenna ports 7~14 is supported on the NCT carrier:

In the regular subframe, the regular CP: OFDM symbol numbered #0/1/2/4/7/8/10/11;

In the regular subframe, 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 0: OFDM symbol numbered #0/1/2

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 3 and special subframe configuration 8: OFDM symbols numbered #0/1/4/5/7/8;

Special subframe configuration 4: OFDM symbols numbered #0/1/4/5/7/8/11;

Special subframe configuration 5: OFDM symbol numbered #0/1/2;

In special subframes, extend CP:

Special subframe configuration 1 and special subframe configuration 2 and special subframe configuration 5: OFDM symbol numbered #0/1/2/3/6;

Special subframe configuration 3: OFDM symbols numbered #0/1/2/3/6/8/9;

Special subframe configuration 6: OFDM symbols numbered #0/1/2/3/6/8;

In a regular subframe, a regular CP: an OFDM symbol numbered #1/2/8/10;

In the regular subframe, the extended CP: the OFDM symbol numbered #1/2/8;

In special subframes, regular CP:

Special subframe configuration 0: OFDM symbol numbered #1/2

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;

In the special subframe, 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

Special subframe configuration 3 and special subframe configuration 6: OFDM symbol numbered #1/2/8;

Referring to FIG. 10, on the UE side, a signal receiving apparatus according to an embodiment of the present invention 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.

Preferably, the time domain resource is specifically:

62 or 72 subcarriers in the center of the carrier frequency band other than the subcarrier in which the downlink reference signal is transmitted; or

There are consecutive 62 or 72 subcarriers in the center of the carrier band.

For frame structure type 1 : 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,

For frame structure type 1: 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; or

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

Preferably, the tracking downlink reference signal includes at least a CRS.

Preferably, the downlink reference signal includes at least a DRS.

Preferably, 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.

Preferably, the carrier is a carrier of a new carrier type.

Referring to FIG. 11 , on a base station side, 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.

Preferably, the time domain resource is specifically:

There are consecutive 62 or 72 subcarriers in the center of the carrier band.

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,

Preferably, the tracking downlink reference signal includes at least a CRS.

Preferably, the downlink reference signal includes at least a DRS.

Preferably, 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.

Preferably, the carrier is a carrier of a new carrier type.

In summary, 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 way the signal is transmitted. Specifically, on a carrier (especially an NCT carrier), 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.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Thus, 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 form of the case. Moreover, 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 present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

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.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A signal receiving method, characterized in that the method comprises:

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 resource for transmitting the synchronization signal on the carrier is different from the frequency domain resource for transmitting the downlink reference signal on the carrier, where the downlink reference signal includes at least a user equipment-specific reference signal DRS;

2. The method according to claim 1, wherein a time domain resource for transmitting a synchronization signal on the carrier is different from a time domain resource for transmitting a downlink reference signal on the carrier, and/or the carrier The frequency domain resource used for transmitting the synchronization signal is different from the frequency domain resource used for transmitting the downlink reference signal on the carrier, 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, wherein the downlink reference signal for tracking includes at least the cell Exclusive reference signal _C RS.

The method according to claim 1 or 2, wherein the frequency domain resource used for transmitting the synchronization signal on the carrier is: a subcarrier in the center of the frequency band of the carrier except the downlink reference signal transmission 62 or 72 subcarriers other than, or 62 or 72 subcarriers in the center of the frequency band of the carrier;

and / or,

The time domain resource for transmitting the synchronization signal on the carrier is used in the following manner:

method one:

For frame structure type 1: the primary synchronization signal PSS and the secondary synchronization signal SSS are transmitted on adjacent 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; and/or, Frame structure type 2: OFDM symbols in which the PSS is located and OFDM symbols in which the SSS is located are separated by two OFDM symbols in the time domain, and the OFDM symbols in which the SSS is located are transmitted in the OFDM symbol in which the PSS is located in the time domain;

Method 2:

For frame structure type 1 and/or frame structure type 2: PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and SSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6, 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 method according to claim 3, wherein when the mode is used, the time domain resource used for transmitting the synchronization signal on the carrier is: For frame structure type 1: 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

The method according to claim 1 or 2, wherein the carrier is a carrier of a new carrier type.

6. A signal transmitting method, characterized in that the method comprises:

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 The frequency domain resource for transmitting the synchronization signal on the carrier is different from the frequency domain resource for transmitting the downlink reference signal on the carrier, and the downlink reference signal includes at least a user equipment-specific reference signal DRS;

The method according to claim 6, wherein 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 carrier The frequency domain resource used for transmitting the synchronization signal is different from the frequency domain resource used for transmitting the downlink reference signal on the carrier, including:

The subframe for transmitting the synchronization signal is not used for the downlink reference signal for transmission tracking, and/or for transmitting the synchronization signal. The frequency domain resource is not used for the downlink reference signal for transmission tracking, and the downlink reference signal for tracking includes at least the cell-specific reference signal _C RS .

The method according to claim 6 or 7, wherein the frequency domain resource used for transmitting the synchronization signal on the carrier is: a subcarrier in the center of the frequency band of the carrier except the downlink reference signal transmission 62 or 72 subcarriers other than; or 62 or 72 subcarriers in the center of the frequency band of the carrier;

and / or,

method one:

Method 2:

For frame structure type 1 and/or frame structure type 2: PSS is transmitted on the first OFDM symbol in subframe 1 and subframe 6, and SSS is transmitted on the second OFDM symbol in subframe 1 and subframe 6; 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.

9. The method according to claim 8, wherein when the mode is used, the time domain resource used for transmitting the synchronization signal on the carrier is:

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 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 method according to claim 6 or 7, wherein the carrier is a carrier of a new carrier type.

11. A signal receiving device, the device comprising:

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 signal are different, 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, where the downlink reference signal includes at least a user equipment specific reference. Signal DRS;

12. The apparatus according to claim 11, wherein: a time domain resource for transmitting a synchronization signal on the carrier is different from a time domain resource for transmitting a downlink reference signal on the carrier, and/or the carrier The frequency domain resource used for transmitting the synchronization signal is different from the frequency domain resource used for transmitting the downlink reference signal on the carrier, including:

The device according to claim 11 or 12, wherein the frequency domain resource used for transmitting the synchronization signal on the carrier is: in addition to the subcarrier in which the downlink reference signal is transmitted, in the center of the carrier frequency band 62 or 72 subcarriers; or, consecutive 62 or 72 subcarriers in the center of the carrier frequency band;

and / or,

method one:

For frame structure type 1: the primary synchronization signal PSS and the secondary synchronization signal SSS are transmitted on adjacent 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; and/or, Frame structure type 2: OFDM symbols in which 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 leads the OFDM symbol in which the PSS is located in the time domain. Transmission

Method 2:

The device according to claim 13, wherein when the mode is used, the time domain resource used for transmitting the synchronization signal on the carrier is:

The apparatus according to claim 11 or 12, wherein the carrier is a carrier of a new carrier type.

16. A signal transmitting apparatus, the apparatus comprising:

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 a carrier a source, where a time domain resource for transmitting a synchronization signal on the carrier is different from a time domain resource for transmitting a downlink reference signal on the carrier, and/or a frequency domain resource for transmitting a synchronization signal on the carrier The frequency domain resource used for transmitting the downlink reference signal on the carrier is different, and the downlink reference signal includes at least a user equipment-specific reference signal DRS;

The synchronization signal sending unit 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 device according to claim 16, wherein 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 carrier The frequency domain resource used for transmitting the synchronization signal is different from the frequency domain resource used for transmitting the downlink reference signal on the carrier, including:

The device according to claim 16 or 17, wherein the frequency domain resource used for transmitting the synchronization signal on the carrier is: in addition to the subcarrier in which the downlink reference signal is transmitted, in the center of the carrier frequency band 62 or 72 subcarriers; or, consecutive 62 or 72 subcarriers in the center of the carrier frequency band;

and / or,

method one:

Method 2:

The device according to claim 18, wherein when the mode is used, the time domain resource used for transmitting the synchronization signal on the carrier is:

For frame structure type 1: SSS is transmitted on the first OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5; or For frame structure type 1: SSS is transmitted on the second OFDM symbol in subframe 0 and subframe 5, and the PSS is transmitted on the third OFDM symbol in subframe 0 and subframe 5; or

The apparatus according to claim 16 or 17, wherein the carrier is a carrier of a new carrier type.