WO2013163952A1 - Method and device for transmitting physical broadcast channel - Google Patents

Abstract

Disclosed are a method and device for transmitting a physical broadcast channel PBCH, relating to the technical field of wireless communication and providing a PBCH transmission solution applicable to new carrier types. In the present application, a base station performs resource mapping for a PBCH in a PBCH transmission subframe based on an RE corresponding to a downlink reference signal for tracking and on an antenna port for transmitting the downlink reference signal for tracking and/or an RE corresponding to a downlink reference signal for demodulation and on an antenna port for transmitting the downlink reference signal for demodulation, the RE being comprised in a PBCH transmission resource, and sends the PBCH according to a resource mapping result. Therefore, in the present application, more reasonable resource mapping can be performed for a PBCH according to reference signal transmission characteristics of new carrier types, so that the solution can be applied to the new carrier types to improve the resource utilization and PBCH transmission performance.

Description

 The present invention claims the priority of the Chinese patent application filed on May 4, 2012, the Chinese Patent Application No. 201210138651.8, entitled "Transmission Method and Apparatus for Physical Broadcast Channels", which The entire contents are incorporated herein by reference. Technical field

 The present invention relates to the field of wireless communications, and in particular, to a method and device for transmitting a physical broadcast channel. Background technique

 In the Long Term Evolution-Advanced (LTE-A) system, the peak rate of the system is significantly higher than that of 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 terminal, that is, to aggregate multiple consecutive or discontinuous carriers under the same base station (eNB), and simultaneously serve the user equipment (User Equipment, UE) to provide the required Rate, as shown in Figure 1. These aggregated carriers are also called component carriers (CC). 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 the maximum.

 The downlink reference signals in the LTE-A system mainly include Cell-specific Reference Signals (CRS) and UE-specific Reference Signals (UTS), or also known as Downlink or Dedicated Reference Signals, DRS. ), Positioning Reference Signal (PRS), Channel State Information Reference Signal (CSI-RS).

 The CRS supports 1, 2, and 4 antenna port transmissions, which are respectively configured on the antenna ports ρ=0, ρ=0,1, p=0, 1,2,3, which are mainly used for the Physical Broadcast Channel (PBCH), Physical Downlink Control Channel (Physical Downlink Control Channel) (Physical HARQ Indication Channel (PHICH), Physical Control Format Indicator Channel (PCFICH), Physical Control Format Indicator Channel (PCFICH) The data demodulation of the physical downlink shared channel (PDSCH), etc., is shown in a physical resource block (PRB) as shown in Fig. 2a and Fig. 2b. Among them, Fig. 2a is a normal cycle. The mapping method under the prefix (Cyclic Prefix, CP), and Figure 2b shows the mapping method under the extended CP.

DRS supports 1~8 antenna port transmission, which can be configured on antenna port ρ = 5, ρ = Ί, p = S, p = 7, S, ..., v + 6 , where υ is the transmission layer of PDSCH (Layer) The number of DRS mappings on antenna port 7/8/11/13 is the same, and the DRS mapping positions on antenna ports 9/10/12/14 are the same, as shown in Figure 3a and Figure 3b. Figure 3a shows the mapping mode under the regular CP, and Figure 3b shows the mapping mode under the extended CP. DRS only uses the transmission mode The 7-9 PDSCH is sent on the PRB. Release 10 (Rel-10) specifies that when there is a PRB with overlapping resources in the same subframe in the DRS and the PBCH or the synchronization signal (for example, 6 PRBs in the middle of the cell band), the DRS will not be transmitted in these PRBs, so these The PDSCH transmission within the PRB cannot be demodulated based on DRS, but the PDSCH can be demodulated based on CRS in these PRBs.

 The PBCH in the LTE-A system is updated in a period of 40 ms, and the first four orthogonal frequency divisions of the second time slot (ie, time slot 1) of the subframe 0 of each radio frame in consecutive four radio frames Orthogonal Frequency Division Multiplexing (OFDM) symbol transmission, fixed 72 core carriers occupying the center of the cell frequency band in the frequency domain, as shown in FIG. 4a and FIG. 4b, wherein FIG. 4a is a mapping manner under a conventional CP, such as Figure 4b shows the mapping method under the extended CP. The PBCH in each radio frame can be independently decoded. PBCH supports two transmission modes: single antenna port and multi-antenna port transmit diversity transmission. When transmitting on 2 antenna ports, Space-Frequency Block Coding (SFBC) scheme is required, which is available on the OFDM symbol where PBCH transmission is required. The number of resource elements (Resources) is even. When 4 antenna ports are transmitted, the combination of SFBC and Frequency Switched Transmit Diversity (FSTD) requires the available REs on the OFDM symbols where the PBCH transmission is located. The number is an integer multiple of 4. The PBCH always performs resource mapping based on the CRS transmission hypothesis of the 4-antenna port, which can use the RE resource for the RE other than the RE corresponding to the CRS of the 4-antenna port on the OFDM symbol. Therefore, under the normal CP, the number of available REs of the PBCH in the 40ms period is 4 χ 6 χ [4 χ 12-8] = 960 (4 radio frames, 6 PRBs in the frequency domain in each radio frame, on the time domain) 4 OFDM symbols, 4 OFDM symbols have 8 CRS-corresponding REs in each PRB, and PBCH is modulated by Quadrature Phase-Shift Keying (QPSK), PBCH in 40 ms period The number of coded bits is 960 χ 2=1920. Similarly, under the extended CP, the number of coded bits is 2 x 4 x 6 x [4 x 12-12]=1728.

The PBCH is used to carry a master information block (MIB), and carries some main cell physical layer information for transmitting parameters that enable the UE to initially access the system, including: downlink system bandwidth, PHICH configuration, and System Frame Number (SFN). The MIB only carries the most important 8-bit SFN information, and the other 2 bits of SFN information can be obtained implicitly by PBCH decoding, that is, the PBCH obtained according to the actual decoding is obtained in the radio frame position in the 40 ms time interval, and the first radio frame corresponds to 00, the second radio frame corresponds to 01, the third radio frame corresponds to 10, and the fourth radio frame corresponds to 11. In addition, the PBCH is demodulated based on the CRS, and the number of CRS antenna ports used can be represented by using different scrambling sequences for the Cyclic Redundancy Check (CRC) information of the PBCH, as shown in Table 1. The UE can obtain the number of antenna ports by blindly detecting the scrambling sequence of the CRC of the PBCH. Channels such as PDCCH, PHICH, and PCFICH use the same number of CRS antenna ports as the PBCH.

Table 1 In order to further improve the system resource utilization, Release 11 (Rel-11) of the LTE-A system determines to introduce a new carrier type (Additional Carrier Type or New Carrier Type, NCT) to enhance system frequency usage and better support. Construct a network and reduce power consumption.

 Currently, there is no specific implementation scheme for how to perform PBCH transmission on an NCT carrier. Summary of the invention

 The embodiment of the invention provides a method and a device for transmitting a physical broadcast channel, which are used to provide a PBCH transmission scheme that can be applied to an NCT carrier.

 A method for transmitting a physical broadcast channel PBCH, the method comprising:

 The base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, corresponding to the resource unit RE on the antenna port where the downlink reference signal for tracking is located, and/or used for The demodulated downlink reference signal performs resource mapping on the PBCH corresponding to the RE on the antenna port on which the downlink reference signal for demodulation is transmitted; wherein the downlink reference signal used for tracking includes at least Tracking the cell-specific reference signal CRS, the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS; and the base station sends the PBCH according to the resource mapping result.

 A method for transmitting a physical broadcast channel PBCH, the method comprising:

 The terminal is based on the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding resource unit RE on the antenna port where the downlink reference signal transmission for tracking is located, and/or the downlink reference signal used for demodulation The corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted receives the PBCH;

 The downlink reference signal used for tracking includes at least a cell-specific reference signal CRS for tracking, and the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS.

 A base station, the base station comprising:

 a resource mapping unit, configured to: in the PBCH transmission subframe, a resource element RE corresponding to the downlink reference signal for tracking included in the PBCH transmission resource, where the downlink reference signal for tracking is located, And/or a downlink reference signal for demodulation, performing resource mapping on the PBCH corresponding to an RE on an antenna port where the downlink reference signal used for demodulation is located; wherein the downlink reference for tracking The signal includes at least a cell-specific reference signal CRS for tracking, and the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS;

 And a sending unit, configured to send the PBCH according to the resource mapping result.

 A terminal, the terminal comprising:

a receiving unit, configured to: according to the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding resource unit RE on the antenna port where the downlink reference signal for tracking is located, and/or for demodulation The downlink reference signal receives the PBCH corresponding to the RE on the antenna port where the downlink reference signal for demodulation is transmitted; The downlink reference signal used for tracking includes at least a cell-specific reference signal CRS for tracking, and the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS;

 An obtaining unit, configured to acquire carrier information according to the received PBCH.

 In this solution, the base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, corresponds to the RE on the antenna port where the downlink reference signal for tracking is located, and/or The demodulated downlink reference signal performs resource mapping on the PBCH according to the corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted, and sends the PBCH according to the resource mapping result. It can be seen that, when performing resource mapping on the PBCH, the scheme performs more reasonable resource mapping on the PBCH according to the downlink reference signal used for tracking on the new carrier type and/or the corresponding RE on the downlink reference signal antenna port used for demodulation. Therefore, the scheme can be applied to PBCH transmission on an NCT carrier to improve resource utilization and PBCH transmission performance. DRAWINGS

 1 is a schematic diagram of carrier aggregation in the prior art;

 2a is a schematic diagram of resource mapping of a CRS in a conventional CP under a conventional CP;

 2b is a schematic diagram of resource mapping of a CRS in an extended CP in the prior art;

 FIG. 3a is a schematic diagram of resource mapping of a DRS in a conventional CP under a conventional CP; FIG.

 FIG. 3b is a schematic diagram of resource mapping of a DRS in an extended CP in the prior art; FIG.

 4a is a schematic diagram of resource mapping of a PBCH in a conventional CP under a conventional CP;

 4b is a schematic diagram of resource mapping of a PBCH in an extended CP in the prior art;

 FIG. 5 is a schematic flowchart of a method according to an embodiment of the present disclosure;

 FIG. 6 is a schematic flowchart of another method according to an embodiment of the present disclosure;

 FIG. 7a is a resource mapping manner of PBCH transmit diversity of a 2-antenna port according to an embodiment of the present invention; FIG. 7b is another resource mapping manner of PBCH transmit diversity of a 2-antenna port according to an embodiment of the present invention; A further resource mapping manner of the PBCH transmit diversity of the 2 antenna port; FIG. 7 is a further resource mapping manner of the PBCH transmit diversity of the 2 antenna port according to the embodiment of the present invention; FIG. 8a is a PBCH transmission of the 4 antenna port according to the embodiment of the present invention; A resource mapping manner of diversity; FIG. 8b is another resource mapping manner of PBCH transmit diversity of 4-antenna port in the embodiment of the present invention; FIG. 8c is another resource mapping of PBCH transmit diversity of 4-antenna port in the embodiment of the present invention; FIG. 8 is a schematic diagram of another resource mapping manner of a PBCH transmit diversity of a 4-antenna port according to an embodiment of the present invention; FIG. 9 is a schematic structural diagram of a device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another device according to an embodiment of the present invention. detailed description The working scheme for the NCT carrier is under discussion. The current conclusions include: Support for CRS transmission on a single antenna port (antenna port 0) with a period of 5ms, CRS is not used for downlink data demodulation, only for tracking and measurement; The NCT carrier in Rel-11 cannot work independently and needs to work in conjunction with a legacy carrier. According to whether the receiver has a certain deviation from the legacy carrier in the time domain and the frequency domain, it is divided into a synchronous carrier and an asynchronous carrier. A separate time-frequency synchronization process is required. Therefore, the synchronization signal needs to be transmitted on the NCT carrier. The time-frequency domain resources of the synchronization signal transmission do not overlap with the resources of the downlink reference signals such as CRS and DRS, so as to improve the downlink transmission efficiency of the NCT carrier. Furthermore, in Rel-12 and subsequent releases, the NCT carrier may support independent operation.

 Based on the above analysis, on the NCT carrier, the currently defined CRS transmission will not be used for demodulation of downlink data transmission, and downlink data transmission such as PBCH, PDCCH, PHCIH, PCFICH, PDSCH, etc. may need to be demodulated based on DRS, and when PBCH and When there is overlap in the DRS, the downlink data cannot be transmitted in the PRB where the PBCH is located, thereby reducing the downlink transmission efficiency of the NCT carrier. In addition, there is only one antenna port CRS transmission on the NCT carrier, and the PBCH does not always assume that the 4 antenna port CRS performs resource mapping.

 Referring to FIG. 5, the embodiment of the present invention provides a PBCH transmission method for a base station side, which includes the following steps:

 Step 50: The base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding resource unit (RE) on the antenna port where the downlink reference signal for tracking is located, and And the downlink reference signal used for demodulation performs resource mapping on the PBCH on the corresponding RE on the antenna port where the downlink reference signal for demodulation is located; wherein the downlink reference signal used for tracking includes at least tracking a cell-specific reference (CRS), the downlink reference signal used for demodulation includes at least a downlink user-specific reference signal (DRS);

 Step 51: The base station sends a PBCH according to the resource mapping result, that is, the base station sends the resource mapped in step 50.

PBCH.

 Further, the base station further sends a downlink reference signal for demodulating the PBCH, and the downlink reference signal used for demodulating the PBCH is a DRS or a CRS for demodulation.

 As a case, when the downlink reference signal used for demodulating the PBCH is DRS, the base station may perform one of the following seven methods when performing resource mapping in step 50:

 First, mapping the PBCH to all REs in the PBCH transmission resource;

 Second, mapping the PBCH to the PBCH transmission resource except for the downlink reference signal for tracking on the RE other than the corresponding RE on the antenna port where the downlink reference signal for tracking is located;

 Third, the PBCH is mapped to the PBCH transmission resource except that the downlink reference signal used for demodulation is on a RE other than the corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted;

Fourth, mapping the PBCH to the PBCH transmission resource, the downlink reference signal for demodulation, the corresponding RE on the antenna port where the downlink reference signal for demodulation is located, and the downlink reference signal for tracking For other REs other than the corresponding RE on the antenna port where the downlink reference signal transmission is used for tracking; Fifth, mapping the PBCH to other REs of the PBCH transmission resource except the corresponding RE of the CRS on the antenna port 0;

 Sixth, mapping the PBCH to the PBCH transmission resource other than the RE corresponding to the RE on the K antenna ports where the DRS transmission is located;

 Seventh, the PBCH is mapped to the PBCH transmission resource except for the corresponding RE of the DRS on the K antenna ports where the DRS transmission is located, and the REs of the CRS corresponding to the RE corresponding to the antenna port 0.

 When the first method is used, that is, when the base station maps the PBCH to all the REs in the PBCH transmission resource, the PBCH carries 2304 bits of coded bits under the regular cyclic prefix (CP) and the extended CP;

 The fifth method is used, that is, when the base station maps the PBCH to other REs of the PBCH transmission resource except the corresponding RE of the CRS on the antenna port 0, the coded bit carried by the PBCH under the regular CP is 2208 bits. The coded bit carried under the extended CP is 2112 bits;

 In the sixth method, the base station maps the PBCH to the PBCH transmission resource, except that the DRS is on the RE other than the RE corresponding to the K antenna ports where the DRS transmission is located, and the PBCH is in the regular CP. And the coded bits carried in the extended CP are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located;

 In the seventh method, the base station maps the PBCH to the PBCH transmission resource, and the RE corresponding to the D antenna on the K antenna ports where the DRS transmission is located, and the RE corresponding to the CRS on the antenna port 0. When the other REs are on, the coded bits carried by the PBCH under the normal CP are 48*[46-B] bits, and the coded bits carried under the extended CP are 48*[44-B] bits, where B is a PBCH transmission. The number of REs in the resource corresponding to the DRS on the K antenna ports where the DRS transmission is located.

 Preferably, when the resource mapping is performed by using any one of the above seven methods, in particular, the foregoing first, third, or sixth method is adopted, that is, the PBCH is mapped to the PBCH transmission at the base station. All REs in the resource, or PBCH transmission resources, except for the downlink reference signal used for demodulation on the RE other than the corresponding RE on the antenna port where the downlink reference signal for demodulation is located, or PBCH transmission When the DRS is on the RE other than the corresponding RE on the K antenna ports where the DRS transmission is located, at least one of the following two conditions must be met: Condition 1: The base station transmits the downlink reference signal for tracking. The subframe is different from the subframe in which the PBCH is transmitted (that is, the PBCH transmission subframe); or,

 The physical resource block (PRB) that the base station transmits the downlink reference signal for tracking is different from the PRB that transmits the PBCH; or

 The subframe in which the base station transmits the downlink reference signal for tracking is different from the subframe in which the PBCH is transmitted, and the PRB in which the base station transmits the downlink reference signal for tracking is different from the PRB in which the PBCH is transmitted.

Condition 2: the subframe in which the base station sends the CRS for tracking is different from the subframe in which the PBCH is transmitted; or the PRB that the base station sends the CRS for tracking is different from the PRB that sends the PBCH; or The subframe in which the base station transmits the CRS for tracking is different from the subframe in which the PBCH is transmitted, and the PRB in which the base station transmits the CRS for tracking is different from the PRB in which the PBCH is transmitted.

 Preferably, when the resource mapping is performed by using any one of the above seven methods, especially when the first, second, or fifth method is used, that is, the PBCH is mapped to the PBCH at the base station. All the REs in the transmission resource, or the PBCH transmission resources except the downlink reference signal used for tracking on the RE other than the corresponding RE on the antenna port where the downlink reference signal transmission is used for tracking, or the PBCH transmission resource In addition to the CRS on the RE other than the corresponding RE on the antenna port 0, it is required to: Orthogonal Frequency Division Multiplexing (OFDM) symbols and DRS in which the PBCH transmission is located in the PBCH transmission subframe and/or time slot. The OFDM symbol in which the transmission is located is different.

 When the base station uses P antenna ports to transmit diversity to transmit PBCH:

 The base station includes, in the PBCH transmission resource, a downlink reference signal for tracking and/or a downlink reference signal for demodulation on the OFDM symbol of the corresponding RE on the antenna port where the transmission is performed, and the vacant part of the available RE does not perform the PBCH resource. Mapping, such that the number of REs used to transmit the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is the downlink reference signal for tracking on the OFDM symbol in the PBCH transmission resource And/or other REs other than the corresponding REs on the antenna port on which the downlink reference signal used for demodulation is located. Preferably, for an OFDM symbol on the OFDM symbol whose number of available REs is an integer multiple of P, the PBCH may be mapped on all available REs on the OFDM, that is, the available REs are not vacated or the available REs are determined to be vacated. The number is 0.

 Preferably, the vacant part can use the method that the RE does not perform PBCH resource mapping, and is more suitable for using the second, third, fourth, fifth, sixth or seventh method to perform PBCH. When the resource is mapped, the base station maps the PBCH to the PBCH transmission resource, except for the downlink reference signal used for tracking, the corresponding RE on the antenna port where the downlink reference signal for tracking is located, and/or the downlink for demodulation. When the reference signal is on another RE other than the corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted, or the base station maps the PBCH to the PBCH transmission resource except the corresponding RE of the CRS on the antenna port 0. And/or when the DRS is on a RE other than the corresponding RE on the K antenna ports where the DRS transmission is located.

 For example, when the base station uses two antenna ports to transmit diversity to transmit PBCH, the method in which the vacant part can use the RE to not perform PBCH resource mapping can use the method as shown in FIG. 7a to FIG. 7d. When the base station uses the four antenna ports to transmit the diversity transmission PBCH, the vacant part can use the RE without the PBCH resource mapping method, and the method as shown in FIG. 8a to FIG. 8d can be used. 7a to 7d, Muted RE (RE without mapped data) is vacated RE, Grouped RE (grouped RE) is 2 pairs of REs for PBCH transmission; Figure 8a to Figure 8d, Muted RE is an vacated RE, and Grouped RE is a pair of four REs for PBCH transmission. A slash and labeled CRS is the RE used for CRS transmission.

Correspondingly, when the PBCH is mapped to the other REs of the PBCH transmission resource except the corresponding RE of the CRS on the antenna port 0, the PBCH carries the coded bit in the normal CP. *[46-A] bits, the coded bits carried under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or By,

 In the sixth method, the base station maps the PBCH to the PBCH transmission resource except for the RE corresponding to the RE on the K antenna ports where the DRS transmission is located, and the PBCH is under the regular CP and the extended CP. The coded bits of the bearer are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; ,

 In the seventh method, the base station maps the PBCH to the PBCH transmission resource, except for the RE corresponding to the D antenna on the K antenna ports where the DRS transmission is located, and the RE corresponding to the RE corresponding to the CRS on the antenna port 0. In the upper case, the coded bits carried by the PBCH under the normal CP are 48*[46-BA] bits, and the coded bits carried under the extended CP are 48*[44-BA] bits, where A is the number of vacated REs. B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located.

 The value of K above may be 1 or 2 or 4, when K=l; the antenna ports where the DRS transmission is located is antenna port 5 or antenna port 7 or antenna port 8; when Κ is greater than 1, the DRS transmission is located One antenna port is antenna port 7 to antenna port Κ+6.

 When the downlink reference signal used for demodulating the PBCH is DRS, the base station does not scramble the cyclic redundancy check (CRC) of the PBCH when transmitting the PBCH in step 51, and is used to demodulate the antenna port where the DRS transmission of the PBCH is located. The number is the number of pre-agreed antenna ports; or,

 The base station determines, according to the correspondence between the number of antenna ports in which the DRS transmission for demodulating the PBCH is located and the scrambling sequence, a scrambling sequence corresponding to the number of antenna ports currently used to transmit the DRS for demodulating the PBCH, and uses The scrambling sequence scrambles the CRC of the PBCH, and the scrambling sequence indicates the number of antenna ports on which the DRS transmission for demodulating the PBCH is located.

 The downlink reference signal used for tracking may also include: one or more combinations of PRS, CSI-RS.

 In another case, when the downlink reference signal used for demodulating the PBCH is the CRS for demodulation, the base station may perform any of the following two methods when performing resource mapping on the PBCH in step 50:

 First, mapping the PBCH to other REs of the PBCH transmission resource except the corresponding REs of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3;

 Second, mapping the PBCH to the PBCH transmission resource except the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the corresponding RE of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3. On other RE.

When the second method is used, the base station maps the PBCH to the corresponding REs of the PBCH transmission resources except the DRS on the antenna port where the DRS transmission is located, and the CRS is at the antenna port 0, the antenna port 1, and the antenna port. 2, when other REs than the corresponding REs on the antenna port 3, the coded bits carried by the PBCH under the normal CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B Bit, where B is the number of REs corresponding to the DRS in the PBCH transmission resource on the antenna port where the DRS transmission is located. The base station sends a CRS for demodulating the PBCH, and the specific method can be as follows:

 Transmitting a CRS for demodulating a PBCH in a PBCH transmission subframe, or transmitting a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in a PBCH transmission subframe, or a PBCH transmission in a PBCH transmission subframe Transmitting a CRS for demodulating a PBCH in a slot, or transmitting a CRS for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in a PBCH transmission subframe, or in a PBCH transmission subframe A CRS for demodulating a PBCH is transmitted on an OFDM symbol for transmitting a PBCH, or a CRS for demodulating a PBCH is transmitted on an OFDM symbol for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in a PBCH transmission subframe.

 In the method, the base station initializes the DRS according to the following formula 1 or formula 2:

Formula one:

Equation 2: c _imt = (L" _s / 2" + 1) · (2 ' + 1) · 2 ¹⁶ + η

Where _sem is a parameter related to multi-user multiple input and output MU-MIMO, and the PBCH may be pre-agreed as a fixed value, such as 0 or 1; 2" is the number of the PBCH transmission subframe, that is, each subframe is initialized once; For the UE-specific parameters, the PBCH can be pre-agreed to a fixed value, and the value of X is an integer; N ¹ is a cell identifier.

 In the method, the PBCH transmission subframe is a preset subframe for PBCH transmission, for example, subframe 0 in each radio frame. The PBCH transmission resource is preset, or on the OFDM symbol for transmitting the PBCH in the PRB where the PBCH transmission is located in the PBCH transmission subframe (for example, the first 4 slots of the second slot of the subframe 0 in each radio frame) A set of REs of OFDM symbols). The PRB in which the PBCH transmission is located in the PBCH transmission subframe may be the PRB where the 72 subcarriers in the center of the frequency band are located, that is, the six PRBs in the center of the frequency band.

 Referring to FIG. 6, the embodiment of the present invention provides a PBCH transmission method for a terminal side, and the method includes the following steps:

 Step 60: The terminal is based on the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding RE on the antenna port where the downlink reference signal for tracking is located, and/or the downlink reference signal used for demodulation. The corresponding RE on the antenna port on which the downlink reference signal is transmitted for demodulation receives the PBCH. The downlink reference signal used for tracking includes at least a CRS for tracking, and the downlink reference signal used for demodulation includes at least a DRS. .

 Further, after step 60, the following steps may be included:

 Step 61: The terminal acquires carrier information according to the received PBCH.

 Further, the terminal further receives a downlink reference signal for demodulating the PBCH, and the downlink reference signal used for demodulating the PBCH is a DRS or a CRS for demodulation.

 As a case, when the downlink reference signal used for demodulating the PBCH is DRS, the terminal receives in step 60.

PBCH, you can use one of the following seven methods:

 First, receiving PBCH on all REs in the PBCH transmission resource; or

Second, in the PBCH transmission resource, except for the downlink reference signal used for tracking, the downlink reference signal used for tracking Receiving a PBCH on another RE other than the corresponding RE on the antenna port where the transmission is located;

 Third, in the PBCH transmission resource, the downlink reference signal used for demodulation receives the PBCH on the RE other than the corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted;

 Fourth, in the PBCH transmission resource, the downlink reference signal for demodulation is corresponding to the RE on the antenna port where the downlink reference signal for demodulation is located, and the downlink reference signal for tracking is used for tracking Receiving a PBCH on a RE other than the corresponding RE on the antenna port where the downlink reference signal is transmitted;

 Fifth, in the PBCH transmission resource, the PBCH is received on the RE other than the corresponding RE on the antenna port 0 of the CRS; or

 Sixth, in the PBCH transmission resource, the PBCH is received on the other REs other than the corresponding REs on the K antenna ports where the DRS transmission is located;

 Seventh, the PBCH is received in the PBCH transmission resource except that the DRS corresponds to the RE on the K antenna ports where the DRS transmission is located, and the REs other than the RE corresponding to the CRS on the antenna port 0.

 In the first method, that is, when the terminal receives the PBCH on all REs in the PBCH transmission resource, the PBCH carries 2304 bits of coded bits under the regular CP and the extended CP;

 The fifth method is used, that is, the terminal corresponds to the CRS on the antenna port 0 in the PBCH transmission resource.

When the PBCH is received, the PBCH carries a coded bit of 2208 bits under the regular CP and 2112 bits of the coded bit carried in the extended CP.

 The sixth method is used, that is, the terminal receives the PBCH in the PBCH transmission resource except for the RE corresponding to the RE on the K antenna ports where the DRS transmission is located, and the PBCH is in the regular CP and the extended CP. The coded bits of the lower bearer are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located;

 The seventh method is used, that is, the terminal is in the PBCH transmission resource except for the RE corresponding to the DRS on the K antenna ports where the DRS transmission is located, and the REs other than the RE corresponding to the CRS on the antenna port 0. When receiving the PBCH, the coded bits carried by the PBCH under the normal CP are 48*[46-B] bits, and the coded bits carried under the extended CP are 48*[44-B] bits, where B is the DRS in the PBCH transmission resource. The number of REs corresponding to the K antenna ports on which the DRS transmission is located.

Preferably, when the PBCH is received by any of the above seven methods, in particular, the first, third, or sixth method described above is used, that is, all of the terminals in the PBCH transmission resource. On the RE, or the PBCH transmission resource, except for the downlink reference signal used for demodulation on the RE other than the corresponding RE on the antenna port where the downlink reference signal transmission for demodulation is located, or the PRSCH transmission resource except DRS When receiving the PBCH on the REs other than the corresponding REs on the K antenna ports where the DRS transmission is located, the following is required: The subframe in which the terminal receives the downlink reference signal for tracking is different from the subframe in which the PBCH is received, and/ Or, the PRB of the downlink reference signal received by the terminal for tracking is different from the PRB used by the receiving PBCH; or The subframe in which the terminal receives the CRS for tracking is different from the subframe in which the PBCH is received, and/or the PRB that the terminal receives the CRS for tracking is different from the PRB that receives the PBCH.

 Preferably, when the PBCH is received by any one of the above seven methods, especially when the first, second, or fifth method is used, that is, the terminal is all in the PBCH transmission resource. The RE, or the PBCH transmission resource, except for the downlink reference signal used for tracking, on the RE other than the corresponding RE on the antenna port where the downlink reference signal transmission is used for tracking, or the PBCH transmission resource except the CRS in the antenna When receiving a PBCH on a RE other than the corresponding RE on port 0, it is required to satisfy: In the PBCH transmission subframe and/or time slot, the OFDM symbol in which the PBCH transmission is located is different from the OFDM symbol in which the DRS transmission is located.

 When the terminal uses P antenna port transmit diversity to receive PBCH:

 The terminal includes a downlink reference signal for tracking in the PBCH transmission resource and/or a downlink reference signal for demodulation on the OFDM symbol of the corresponding RE on the antenna port where the transmission is located, and the vacant part of the available RE does not receive the PBCH, When the terminal receives the PBCH by using the P antenna port transmit diversity, the number of REs for transmitting the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is in the PBCH transmission resource. The RE on the OFDM symbol except the downlink reference signal for tracking and/or the RE reference signal for demodulation other than the corresponding RE on the antenna port on which the transmission is located. Preferably, for an OFDM symbol on the OFDM symbol whose number of available REs is an integer multiple of P, the PBCH may be mapped on all available REs on the OFDM, that is, the available REs are not vacated or the available REs are determined to be vacated. The number is 0.

 Preferably, the method that the vacant part can use the RE to not perform PBCH resource mapping is more suitable when the second, third, fourth, fifth, sixth or seventh method is used to receive the PBCH. That is, the terminal in the PBCH transmission resource except for the downlink reference signal used for tracking, the corresponding RE on the antenna port where the downlink reference signal transmission for tracking is located, and/or the downlink reference signal for demodulation is used for the solution. When the PBCH is received on the RE other than the corresponding RE on the antenna port where the downlink reference signal is transmitted, or the terminal in the PBCH transmission resource except the CRS corresponding to the RE on the antenna port 0, and/or the DRS is in the PBCH transmission resource. When the PBCH is received on the RE other than the corresponding RE on the K antenna ports where the DRS transmission is located.

 Correspondingly, in the fifth method, that is, the terminal receives the PBCH in the PBCH transmission resource except the RE corresponding to the RE on the antenna port 0, the PBCH carries the coded bit in the normal CP. *[46-A] bits, the coded bits carried under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or

 In the sixth method, that is, the terminal receives the PBCH in the PBCH transmission resource except for the RE corresponding to the RE on the K antenna ports where the DRS transmission is located, and the PBCH is under the regular CP and the extended CP. The coded bits of the bearer are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; ,

In the seventh method, that is, the terminal in the PBCH transmission resource except the DRS in the K days where the DRS transmission is located The corresponding RE on the line port and the other REs other than the RE corresponding to the CRS on the antenna port 0, when receiving the PBCH, the coded bits carried by the PBCH under the normal CP are 48*[46-BA] bits, in the extended CP. The coded bits of the lower bearer are 48*[44-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located.

 The value of K above is 1 or 2 or 4. When the K=l, the antenna ports where the DRS transmission is located are antenna port 5 or antenna port 7 or antenna port 8; when Κ is greater than 1, the DRS transmission is located. The antenna ports are from antenna port 7 to antenna port Κ+6.

 When the downlink reference signal used for demodulating the PBCH is DRS, when the terminal receives the PBCH in step 60, the CRC of the PBCH is not descrambled, and the number of antenna ports used for demodulating the PRSCH DRS transmission is a predetermined number of antenna ports. Or,

 The terminal determines, according to the corresponding relationship between the number of antenna ports in which the DRS transmission for demodulating the PBCH is located and the scrambling sequence, a scrambling sequence corresponding to the number of antenna ports currently used to transmit the DRS for demodulating the PBCH, and uses The scrambling sequence descrambles the CRC of the PBCH, and the scrambling sequence indicates the number of antenna ports on which the DRS transmission for demodulating the PBCH is located.

 The downlink reference signal used for tracking may also include: one or more combinations of PRS, CSI-RS.

 In another case, when the downlink reference signal used for demodulating the PBCH is a CRS for demodulation, the terminal receives the PBCH in step 60, and specifically may use any one of the following two methods:

 First, in the PBCH transmission resource, the PBCH is received on the REs other than the corresponding REs on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3;

 Second, in the PBCH transmission resource, except for the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and

The CRS receives PBCH ₀ on REs other than the corresponding REs on antenna port 0, antenna port 1, antenna port 2, and antenna port 3.

 When the second method is used, that is, the terminal is in the PBCH transmission resource except the corresponding RE of the DRS on the antenna port where the DRS transmission is located, and the CRS is at the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3. For other REs other than the corresponding RE, when the PBCH is received, the coded bits carried by the PBCH under the normal CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B] bits. Where B is the number of REs corresponding to the DRS in the PBCH transmission resource on the antenna port where the DRS transmission is located.

 The terminal receives the CRS for demodulating the PBCH, and the specific method can be as follows:

Receiving a CRS for demodulating a PBCH in a PBCH transmission subframe, or receiving a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in a PBCH transmission subframe, or a PBCH transmission in a PBCH transmission subframe Receiving a CRS for demodulating a PBCH in a time slot, or receiving a CRS for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in a PBCH transmission subframe, or in a PBCH transmission subframe Receiving a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH, or transmitting in a PBCH The CRS for demodulating the PBCH is received on the OFDM symbol for transmitting the PBCH in the PRB corresponding to the PBCH transmission RE in the input subframe.

 Embodiment 1:

 Step 1: The base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, corresponding to the RE on the antenna port where the downlink reference signal for tracking is located, and/or used for Demodulating the downlink reference signal to perform resource mapping on the PBCH according to the corresponding RE on the antenna port where the downlink reference signal for demodulation is located; and transmitting the PBCH according to the resource mapping result;

 The base station sends a downlink reference signal for demodulating the PBCH, and the downlink reference signal used for demodulating the PBCH is a DRS; Step 2: The terminal uses the downlink reference signal for tracking included in the PBCH transmission resource in the downlink for tracking The corresponding RE on the antenna port where the reference signal is transmitted, and/or the downlink reference signal for demodulation receives the PBCH corresponding to the RE on the antenna port where the downlink reference signal for demodulation is transmitted;

 The terminal receives a downlink reference signal for demodulating the PBCH, and demodulates the PBCH according to the downlink reference signal. The downlink reference signal used to demodulate the PBCH is DRS.

 The downlink reference signal used for tracking includes at least a CRS for tracking, and the downlink reference signal used for demodulation includes at least a DRS.

 Embodiment 2:

 Step 1: The base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, corresponding to the RE on the antenna port where the downlink reference signal for tracking is located, and/or used for Demodulating the downlink reference signal to perform resource mapping on the PBCH according to the corresponding RE on the antenna port where the downlink reference signal for demodulation is located; and transmitting the PBCH according to the resource mapping result;

 The base station sends a downlink reference signal for demodulating the PBCH, and the downlink reference signal used for demodulating the PBCH is a CRS; Step 2: The terminal uses the downlink reference signal for tracking included in the PBCH transmission resource in the downlink for tracking The corresponding RE on the antenna port where the reference signal is transmitted, and/or the downlink reference signal for demodulation receives the PBCH corresponding to the RE on the antenna port where the downlink reference signal for demodulation is transmitted;

 The terminal receives a downlink reference signal for demodulating the PBCH, and demodulates the PBCH according to the downlink reference signal. The downlink reference signal used to demodulate the PBCH is CRS.

 The downlink reference signal used for tracking includes at least a CRS for tracking, and the downlink reference signal used for demodulation includes at least a DRS.

 Referring to FIG. 9, an embodiment of the present invention further provides a base station, where the base station includes:

The resource mapping unit 90 is configured to: in the PBCH transmission subframe, the corresponding resource unit RE on the antenna port where the downlink reference signal used for tracking is located, based on the downlink reference signal used for tracking included in the PBCH transmission resource And/or a downlink reference signal for demodulation, performing resource mapping on the PBCH corresponding to an RE on an antenna port where the downlink reference signal used for demodulation is located; wherein, the downlink for tracking Reference signal Include a cell-specific reference signal CRS for tracking, where the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS;

 The sending unit 91 is configured to send the PBCH according to the resource mapping result.

 Further, the sending unit 91 is further configured to:

 A downlink reference signal for demodulating the PBCH is transmitted, and the downlink reference signal used for demodulating the PBCH is a DRS or a CRS for demodulation.

 Further, when the downlink reference signal used for demodulating the PBCH is a DRS, the resource mapping unit 90 is configured to:

 Mapping the PBCH to all REs in the PBCH transmission resource; or

 Mapping the PBCH to the PBCH transmission resource, except that the downlink reference signal for tracking is on a RE other than the RE corresponding to the antenna port on which the downlink reference signal transmission for tracking is located; or

 Mapping the PBCH to the PBCH transmission resource, except that the downlink reference signal used for demodulation is on an RE other than the corresponding RE on the antenna port where the downlink reference signal for demodulation is located; or

 Mapping the PBCH to a downlink reference signal for demodulation in the PBCH transmission resource, a corresponding RE on an antenna port where the downlink reference signal for demodulation is transmitted, and a downlink reference signal for tracking And on the other REs other than the corresponding REs on the antenna port where the downlink reference signal transmission is used for tracking; or mapping the PBCH to the REs corresponding to the CRSs on the antenna port 0 of the PBCH transmission resources On other REs; or

 Mapping the PBCH to other REs of the PBCH transmission resource except for the corresponding REs on the K antenna ports where the DRS transmission is located; or

 Mapping the PBCH to the RE of the PBCH transmission resource except for the RE corresponding to the DRS on the K antenna ports where the DRS transmission is located, and the REs of the CRS corresponding to the RE corresponding to the antenna port 0.

 Further, when the resource mapping unit 90 maps the PBCH to all the REs in the PBCH transmission resource, the coded bit carried by the PBCH under the regular cyclic prefix CP and the extended CP is 2304 bits; or

 When the resource mapping unit 90 maps the PBCH to other REs of the PBCH transmission resource except for the RE corresponding to the CRS on the antenna port 0, the coded bit carried by the PBCH under the regular CP is 2208 bits, which is extended. The coded bit carried by the CP is 2112 bits; or

 When the resource mapping unit 90 maps the PBCH to the other REs of the PBCH transmission resource except the corresponding REs on the K antenna ports where the DRS transmission is located, the PBCH is under the regular CP and the extended CP. The coded bits of the bearer are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; or

Mapping the PBCH to the PBCH transmission resource in the PBCH transmission resource by the resource mapping unit 90, except for the RE corresponding to the K antennas on the K antenna ports where the DRS transmission is located, and the RE corresponding to the CRS on the antenna port 0. On the RE, the coded bits carried by the PBCH under the normal CP are 48*[46-B] bits, and the coded bits carried under the extended CP are 48*[44-B] bits, where B is the DRS in the PBCH transmission resource. The number of REs corresponding to the K antenna ports on which the DRS transmission is located.

 Further, when the sending unit 91 sends the PBCH according to the resource mapping result, in particular, the resource mapping unit 90 maps the PBCH to all REs in the PBCH transmission resource, or the PBCH transmission resource The downlink reference signal used for demodulation is on the RE other than the corresponding RE on the antenna port where the downlink reference signal transmission for demodulation is located, or in the PBCH transmission resource except the DRS in the DRS transmission When the K antenna ports are on the RE other than the corresponding RE:

 The subframe in which the transmitting unit 91 transmits the downlink reference signal for tracking is different from the subframe in which the PBCH is transmitted, and/or the transmitting unit 91 transmits the physical resource block PRB and the transmission of the downlink reference signal for tracking. The PRB of the PBCH is different; or,

 The subframe in which the transmitting unit 91 transmits the CRS for tracking is different from the subframe in which the PBCH is transmitted, and/or the PRB in which the transmitting unit 91 transmits the CRS for tracking is different from the PRB in which the PBCH is transmitted.

 Further, when the sending unit 91 sends the PBCH according to the resource mapping result, in particular, the resource mapping unit 90 maps the PBCH to all REs in the PBCH transmission resource, or the PBCH transmission resource. The downlink reference signal used for tracking is on the RE other than the corresponding RE on the antenna port where the downlink reference signal transmission for tracking, or the PBCH transmission resource corresponds to the CRS on the antenna port 0. When other REs other than RE:

 In the PBCH transmission subframe and/or time slot, the orthogonal frequency division multiplexing OFDM symbol in which the PBCH transmission is located is different from the OFDM symbol in which the DRS transmission is located.

 Further, when the sending unit 91 transmits the PBCH by using P antenna port transmit diversity: the resource mapping unit 90 includes the downlink reference signal for tracking and/or in the PBCH transmission resource. The demodulated downlink reference signal is on the OFDM symbol of the corresponding RE on the antenna port on which the transmission is located, and the vacant part of the available RE does not perform PBCH resource mapping, so that the number of REs used to transmit the PBCH on the OFDM symbol is An integer multiple of P; wherein, P=2 or 4, the available RE is a downlink reference signal for tracking and a downlink reference signal for demodulation on the OFDM symbol in the PBCH transmission resource The RE other than the corresponding RE on the antenna port where the transmission is located.

Preferably, the method of using the RE for the vacant part is applicable to the downlink reference signal used for tracking in the downlink reference signal for tracking when the resource mapping unit 90 maps the PBCH to the PBCH transmission resource. Corresponding RE on the antenna port where the signal transmission is located, and/or downlink reference signal for demodulation on the RE other than the RE corresponding to the antenna port on which the downlink reference signal for demodulation is transmitted Or, the resource mapping unit 90 maps the PBCH to the PBCH transmission resource, where the RE corresponding to the CRS on the antenna port 0, and/or the DRS correspond to the K antenna ports where the DRS transmission is located. When other REs than RE are on. Further, when the resource mapping unit 90 maps the PBCH to other REs of the PBCH transmission resource except the RE corresponding to the CRS on the antenna port 0, the coded bit carried by the PBCH under the regular CP is 48*. [46-A] bits, the coded bits carried under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or

 When the resource mapping unit 90 maps the PBCH to the other REs of the PBCH transmission resource except the corresponding REs on the K antenna ports where the DRS transmission is located, the PBCH is under the regular CP and the extended CP. The coded bits of the bearer are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; Or,

 The RE mapping of the PBCH to the PBCH transmission resource in the PBCH transmission resource other than the RE corresponding to the D antenna on the K antenna ports where the DRS transmission is located, and the RE corresponding to the RE corresponding to the CRS on the antenna port 0. In the upper case, the coded bits carried by the PBCH under the normal CP are 48*[46-BA] bits, and the coded bits carried under the extended CP are 48*[44-BA] bits, where A is the number of vacated REs. B is the number of REs corresponding to the DRS in the PBCH transmission resource on the K antenna ports where the DRS transmission is located.

 Further, the value of the K is 1 or 2 or 4, and when the K=1, the antenna ports where the DRS transmission is located are the antenna port 5 or the antenna port 7 or the antenna port 8; When the Κ is greater than 1, the antenna ports where the DRS transmission is located are the antenna port 7 to the antenna port Κ+6.

 Further, when the downlink reference signal used for demodulating the PBCH is a DRS, the sending unit 91 is further configured to:

 The cyclic redundancy check CRC of the PBCH is not scrambled, and the number of antenna ports in which the DRS transmission for demodulating the PBCH is a predetermined number of antenna ports; or

 And scrambling a CRC of the PBCH according to a correspondence between a number of antenna ports in which the DRS transmission for demodulating the PBCH is located and a scrambling sequence, where the scrambling sequence indicates the DRS transmission for demodulating the PBCH The number of antenna ports in which it is located.

 Further, the downlink reference signal used for tracking further includes: one or more combinations of a positioning reference signal PRS and a channel state information reference signal CSI-RS.

 Further, when the downlink reference signal used for demodulating the PBCH is a CRS for demodulation, the resource mapping unit 90 is configured to:

 Mapping the PBCH to other REs of the PBCH transmission resource except for the corresponding REs of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3; or

 Mapping the PBCH to the RE of the PBCH transmission resource corresponding to the DRS on the antenna port where the DRS transmission is located, and the corresponding RE of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3. Other than RE.

Further, the resource mapping unit 90 maps the PBCH to the PBCH transmission resource except the DRS. The code carried by the PBCH under the normal CP when the corresponding RE on the antenna port where the DRS transmission is located and the RE other than the corresponding RE on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3 The bit is 48*[40-B] bits, and the coded bit carried in the extended CP is 48*[36-B] bits, where B is the DRS in the PBCH transmission resource on the antenna port where the DRS transmission is located. The number of corresponding REs.

 Further, the sending unit 91 is configured to:

 Transmitting a CRS for demodulating a PBCH in the PBCH transmission subframe, or transmitting a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe, or transmitting a subframe in the PBCH Transmitting a CRS for demodulating a PBCH in a slot in which the PBCH transmission is located, or transmitting a CRS for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in the PBCH transmission subframe, Or transmitting a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH in the PBCH transmission subframe, or an OFDM symbol for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe A CRS for demodulating the PBCH is transmitted.

 Referring to FIG. 10, an embodiment of the present invention provides a terminal, where the terminal includes:

 The receiving unit 101 is configured to: according to the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding resource unit RE on the antenna port where the downlink reference signal for tracking is located, and/or for demodulation The downlink reference signal is received by the corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted.

The downlink reference signal for tracking includes at least a cell-specific reference signal CRS for tracking, and the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS;

 The obtaining unit 102 is configured to acquire carrier information according to the received PBCH.

 Further, the receiving unit 101 is further configured to:

 And receiving a downlink reference signal for demodulating the PBCH, where the downlink reference signal used for demodulating the PBCH is a DRS or a CRS for demodulation.

 Further, when the downlink reference signal used for demodulating the PBCH is a DRS, the receiving unit 101 is used to:

 Receiving, on all REs in the PBCH transmission resource, the PBCH; or

 Receiving, in the PBCH transmission resource, the PBCH on the RE other than the corresponding RE on the antenna port where the downlink reference signal for tracking is located, in addition to the downlink reference signal used for tracking; or

 Receiving, in the PBCH transmission resource, the PBCH on the RE other than the corresponding RE on the antenna port where the downlink reference signal transmission for demodulation is located, in addition to the downlink reference signal used for demodulation; or

a corresponding RE in the PBCH transmission resource except for the downlink reference signal used for demodulation on the antenna port where the downlink reference signal transmission for demodulation is located, and a downlink reference signal for tracking are used in the Receiving the PBCH on a RE other than the corresponding RE on the antenna port where the downlink reference signal transmission is located; or, in the PBCH transmission resource, other REs other than the corresponding RE of the CRS on the antenna port 0 Receiving The PBCH; or,

 Receiving, in the PBCH transmission resource, the PBCH on the RE other than the corresponding RE on the K antenna ports where the DRS transmission is located; or

 The PBCH is received in the PBCH transmission resource except that the DRS corresponds to the RE on the K antenna ports where the DRS transmission is located, and the REs other than the RE corresponding to the CRS on the antenna port 0.

 Further, the receiving unit 101, when receiving the PBCH on all the REs in the PBCH transmission resource, the coded bit carried by the PBCH under the regular cyclic prefix CP and the extended CP is 2304 bits; or

 The receiving unit 101 receives the PBCH in the PBCH transmission resource, except that the CRS is on a RE other than the corresponding RE on the antenna port 0, and the PBCH carries 2208 bits of coded bits under the regular CP. The coded bit carried by the CP is 2112 bits; or

 The receiving unit 101, in the PBCH transmission resource, except that the DRS receives the PBCH on the RE other than the RE corresponding to the K antenna ports where the DRS transmission is located, the PBCH is under the regular CP and the extended CP. The coded bits of the bearer are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; or

 The receiving unit 101 receives, in the PBCH transmission resource, a RE corresponding to the DRS on the K antenna ports where the DRS transmission is located, and other REs other than the RE corresponding to the CRS on the antenna port 0. In PBCH, the coded bits carried by the PBCH under the normal CP are 48*[46-B] bits, and the coded bits carried under the extended CP are 48*[44-B] bits, where B is the DRS in the PBCH transmission resource. The number of corresponding REs on the K antenna ports where the DRS transmission is located.

 Further, when the receiving unit 101 receives the PBCH, in particular, all the REs in the PBCH transmission resource, or the downlink reference signal used for demodulation in the PBCH transmission resource is used in the solution. a RE other than the corresponding RE on the antenna port where the downlink reference signal transmission is located, or another RE of the PBCH transmission resource except the corresponding RE of the D antenna on the K antenna ports where the DRS transmission is located On, when receiving the PBCH:

 The receiving unit 101 receives a subframe of the downlink reference signal for tracking different from the subframe that receives the PBCH, and/or the receiving unit 101 receives the physical resource block PRB and the receiving of the downlink reference signal for tracking. The PRB used by the PBCH is different; or,

 The subframe in which the receiving unit 101 receives the CRS for tracking is different from the subframe in which the PBCH is received, and/or the PRB that the receiving unit 101 receives the CRS for tracking is different from the PRB that receives the PBCH.

Further, when the receiving unit 101 receives the PBCH, in particular, all the REs in the PBCH transmission resource, or the downlink reference signal used for tracking in the PBCH transmission resource is used in the tracking. When the PBCH is received on the RE other than the corresponding RE on the antenna port where the downlink reference signal is transmitted, or on the other RE of the PBCH transmission resource except the RE corresponding to the CRS on the antenna port 0: In the PBCH transmission subframe and/or time slot, the orthogonal frequency division multiplexing OFDM symbol in which the PBCH transmission is located is different from the OFDM symbol in which the DRS transmission is located.

 Further, when the receiving unit 101 uses P antenna port transmit diversity to receive the PBCH: the receiving unit 101 includes the downlink reference signal for tracking and/or used in the PBCH transmission resource. The demodulated downlink reference signal is on the OFDM symbol of the corresponding RE on the antenna port on which the transmission is located, and the vacant part of the available RE does not receive the PBCH, so that the receiving unit 101 transmits diversity using the P antenna ports. In the PBCH, the number of REs used for transmitting the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is the OFDM symbol in the PBCH transmission resource except for the tracking The downlink reference signal and/or the downlink reference signal used for demodulation are other REs than the corresponding RE on the antenna port on which the transmission is located.

 Preferably, the method for using the RE in the vacant part is applicable to the antenna port where the receiving unit 101 is in the PBCH transmission resource except for the downlink reference signal used for tracking in the downlink reference signal transmission for tracking. The corresponding RE, and/or the downlink reference signal for demodulation, on the RE other than the RE corresponding to the antenna port on which the downlink reference signal for demodulation is transmitted, when the PBCH is received, or The terminal in the PBCH transmission resource, except for the RE corresponding to the CRS on the antenna port 0, and/or the other RE of the DRS corresponding to the RE corresponding to the K antenna ports where the DRS transmission is located, When PBCH is described.

 Further, the receiving unit 101, in the PBCH transmission resource, except that the CRS is on a RE other than the RE corresponding to the antenna port 0, when the PBCH is received, the coded bit carried by the PBCH under the regular CP is 48*. [46-A] bits, the coded bits carried under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or

 The receiving unit 101, in the PBCH transmission resource, except that the DRS receives the PBCH on the RE other than the RE corresponding to the K antenna ports where the DRS transmission is located, the PBCH is under the regular CP and the extended CP. The coded bits of the bearer are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; Or,

 The receiving unit 101 receives, in the PBCH transmission resource, a RE corresponding to the DRS on the K antenna ports where the DRS transmission is located, and other REs other than the RE corresponding to the CRS on the antenna port 0. In PBCH, the coded bits carried by the PBCH under the normal CP are 48*[46-BA] bits, and the coded bits carried under the extended CP are 48*[44-BA] bits, where A is the number of vacated REs. B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located.

 Further, the value of the K is 1 or 2 or 4, and when the K=1, the antenna ports where the DRS transmission is located are the antenna port 5 or the antenna port 7 or the antenna port 8; When the Κ is greater than 1, the antenna ports where the DRS transmission is located are the antenna port 7 to the antenna port Κ+6.

Further, when the downlink reference signal used for demodulating the PBCH is a DRS, the receiving unit 101 is configured to: The CRC of the cyclic redundancy check of the PBCH is not descrambled, and the number of antenna ports where the DRS transmission for demodulating the PBCH is a predetermined number of antenna ports; or

 Decoding the CRC of the PBCH according to a corresponding relationship between the number of antenna ports in which the DRS transmission for demodulating the PBCH is located and the scrambling sequence, the scrambling sequence indicating the DRS transmission for demodulating the PBCH The number of antenna ports in which it is located.

 Further, the downlink reference signal used for tracking further includes: one or more combinations of a positioning reference signal PRS and a channel state information reference signal CSI-RS.

 Further, when the downlink reference signal used for demodulating the PBCH is a CRS for demodulation, the receiving unit 101 is configured to:

 In the PBCH transmission resource, except CRS at antenna port 0, antenna port 1, antenna port 2, and antenna port

Receiving the PBCH on other REs other than the corresponding RE on the 3; or

 Among the PBCH transmission resources, except for the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the REs corresponding to the REs of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3 The PBCH is received.

 Further, the receiving unit 101, in the PBCH transmission resource, except for the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3 For other REs other than the corresponding RE, when the PBCH is received, the coded bits carried by the PBCH under the normal CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B] Bit, where B is the number of REs corresponding to the DRS in the PBCH transmission resource on the antenna port where the DRS transmission is located.

 Further, the receiving unit 101 is configured to:

 Receiving a CRS for demodulating a PBCH in the PBCH transmission subframe, or receiving a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe, or transmitting a subframe in the PBCH Receiving a CRS for demodulating a PBCH in a slot in which the PBCH transmission is located, or receiving a CRS for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in the PBCH transmission subframe, Or receiving a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH in the PBCH transmission subframe, or an OFDM symbol for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe A CRS for demodulating the PBCH is received.

 In summary, the beneficial effects of the present invention include:

In the solution provided by the embodiment of the present invention, the base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, is corresponding to the RE on the antenna port where the downlink reference signal for tracking is located. And/or the downlink reference signal for demodulation, the corresponding RE on the antenna port where the downlink reference signal for demodulation is located, resource mapping the PBCH, and transmitting the PBCH according to the resource mapping result. It can be seen that the scheme uses the downlink reference signal for tracking and/or for demodulation according to the new carrier type when performing resource mapping on the PBCH. The corresponding RE on the downlink reference signal antenna port performs more reasonable resource mapping on the PBCH, so that the scheme can be applied to PBCH transmission on the NCT carrier to improve resource utilization and PBCH transmission performance.

 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.

 Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

 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 method for transmitting a physical broadcast channel PBCH, the method comprising:

 The base station in the PBCH transmission subframe, based on the downlink reference signal for tracking included in the PBCH transmission resource, corresponding to the resource unit RE on the antenna port where the downlink reference signal for tracking is located, and/or used for The demodulated downlink reference signal performs resource mapping on the PBCH corresponding to the RE on the antenna port on which the downlink reference signal for demodulation is transmitted; wherein the downlink reference signal used for tracking includes at least Tracking the cell-specific reference signal CRS, the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS or a CRS for demodulation;

 The base station sends the PBCH according to a resource mapping result.

 The method according to claim 1, wherein the base station corresponds to an antenna port on which the downlink reference signal for tracking is located based on a downlink reference signal for tracking included in the PBCH transmission resource. The RE, and/or the downlink reference signal for demodulation, the resource mapping of the PBCH on the corresponding RE on the antenna port where the downlink reference signal is used for demodulation, specifically includes:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 Mapping the PBCH to all REs in the PBCH transmission resource; or mapping the PBCH to the PBCH transmission resource except for downlink reference signals for tracking in the downlink reference signal transmission for tracking Or the other REs other than the corresponding REs on the antenna port; or mapping the PBCH to the PBCH transmission resource, except for the downlink reference signal used for demodulation in the downlink reference signal transmission for demodulation Or the other REs other than the corresponding REs on the antenna port; or mapping the PBCH to the PBCH transmission resource, except for the downlink reference signal used for demodulation in the downlink reference signal transmission for demodulation a corresponding RE on the antenna port, and a downlink reference signal for tracking on the RE other than the corresponding RE on the antenna port where the downlink reference signal for tracking is located; or mapping the PBCH Allocating to the PBCH transmission resource other than the RE corresponding to the RE on the antenna port 0; or mapping the PBCH to the PBCH transmission resource except D RS is on another RE other than the corresponding RE on the K antenna ports where the DRS transmission is located; or mapping the PBCH to the PBCH transmission resources except the D antennas at the K antenna ports where the DRS transmission is located The corresponding RE, and the CRS are on other REs than the corresponding RE on the antenna port 0;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 Mapping the PBCH to other REs of the PBCH transmission resource except for the corresponding REs of the CRS on antenna port 0, antenna port 1, antenna port 2, and antenna port 3; or mapping the PBCH to the The REs corresponding to the DRS on the antenna port where the DRS transmission is located, and the REs of the CRS other than the corresponding REs on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3 are described in the PBCH transmission resource.

 3. The method of claim 2, wherein

When the downlink reference signal used for demodulating the PBCH is DRS: When the base station maps the PBCH to all the REs in the PBCH transmission resource, the coded bits carried by the PBCH under the regular cyclic prefix CP and the extended CP are 2304 bits; or, at the base station, the PBCH is mapped into the PBCH transmission resource. The PBCH carries 2208 bits of coded bits under the regular CP and 2112 bits of coded bits under the extended CP when the CRS is on the RE other than the corresponding RE on the antenna port 0. Alternatively, the PBCH is mapped at the base station. When the DRS is on the RE other than the corresponding RE on the K antenna ports where the DRS transmission is located, the coded bits carried by the PBCH under the regular CP and the extended CP are 48*[48- B] a bit, where B is the number of REs corresponding to the DRS on the K antenna ports where the DRS transmission is located in the PBCH transmission resource; or, in the base station, mapping the PBCH to the PBCH transmission resource except the DRS When the corresponding RE on the K antenna ports where the DRS transmission is located and the other REs other than the RE corresponding to the CRS on the antenna port 0, the coded bits carried by the PBCH under the regular CP are 48*[46-B] bits. Coded bits carried under the extended CP 48 * [44-B] bits, wherein, B DRS RE in the number of K antenna ports corresponding to the DRS transmission is located PBCH transmission resources;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 Mapping the PBCH to the PBCH transmission resource in the base station, except for the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the corresponding RE of the CRS on the antenna port 0, antenna port 1, antenna port 2, and antenna port 3. When other REs are used, the coded bits carried by the PBCH under the normal CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B] bits, where B is the The number of REs corresponding to the DRS on the antenna port where the DRS transmission is located in the PBCH transmission resource.

 The method according to claim 2 or 3, wherein the transmitting, by the base station, the PBCH according to the resource mapping result, further includes:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 The base station separately sends the downlink reference signal for tracking and the PBCH in different subframes and/or physical resource blocks PRB, or the base station separately sends the used reference message in different subframes and/or PRBs. The tracked CRS and the PBCH; and/or, in the PBCH transmission subframe and/or time slot, the OFDM symbol in which the PBCH transmission is located is different from the OFDM symbol in which the DRS transmission is located;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

Transmitting, by the base station, a CRS for demodulating a PBCH in the PBCH transmission subframe, or transmitting a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe, or in the PBCH Transmitting a CRS for demodulating a PBCH in a slot in which a PBCH transmission in a transmission subframe is transmitted, or transmitting a PBCH for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in a PBCH transmission subframe CRS, or transmitting a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH in the PBCH transmission subframe, or for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe The CRS for demodulating the PBCH is transmitted on the OFDM symbol.

The method according to claim 2, wherein, when the base station uses the P antenna ports to transmit and transmit the PBCH, the base station performs resource mapping on the PBCH, and further includes:

 Included in the PBCH transmission resource, the downlink reference signal for tracking and/or the downlink reference signal used for demodulation on the OFDM symbol of the corresponding RE on the antenna port on which the transmission is located, the vacant part of the available RE is not PBCH resource mapping is performed, so that the number of REs used for transmitting the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is the OFDM symbol in the PBCH transmission resource The downlink reference signal used for tracking and/or the RE reference signal for demodulation is other than the corresponding RE on the antenna port on which the transmission is located.

 The method according to claim 5, wherein, when the base station maps the PBCH to the other REs of the PBCH transmission resource except the corresponding RE of the CRS on the antenna port 0, the PBCH is under the normal CP. The coded bits of the bearer are 48*[46-A] bits, and the coded bits of the 7-bit code under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or

 When the base station maps the PBCH to the other REs of the PBCH transmission resource except the corresponding REs on the K antenna ports where the DRS transmission is located, the coded bits carried by the PBCH under the regular CP and the extended CP are 48*[48-BA] bits, where A is the number of vacated REs, and B is the DRS in the PBCH transmission resource

The number of corresponding REs on the K antenna ports where the DRS transmission is located; or

 When the base station maps the PBCH to the PBCH transmission resource, except that the DRS corresponds to the RE corresponding to the K antenna ports where the DRS transmission is located, and the REs of the CRS corresponding to the RE corresponding to the antenna port 0, the PBCH is The coded bits carried by the conventional CP are 48*[46-BA] bits, and the coded bits carried under the extended CP are 48*[44-BA] bits, where A is the number of vacated REs, and B is the PBCH transmission. The number of REs in the resource corresponding to the DRS on the K antenna ports where the DRS transmission is located.

 The method according to any one of claims 1 to 3, wherein the base station transmits the downlink reference signal according to a resource mapping result when the downlink reference signal used for demodulating a PBCH is a DRS. PBCH, further includes:

 The base station does not scramble the cyclic redundancy check CRC of the PBCH, and the number of antenna ports where the DRS transmission for demodulating the PBCH is a predetermined number of antenna ports; or

 The base station scrambles the CRC of the PBCH according to the corresponding relationship between the number of antenna ports in which the DRS transmission for demodulating the PBCH is located and the scrambling sequence, where the scrambling sequence indicates that the PBCH is used for demodulation The number of antenna ports where the DRS transmission is located.

 A method for transmitting a physical broadcast channel PBCH, the method comprising:

 The terminal is based on the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding resource unit RE on the antenna port where the downlink reference signal transmission for tracking is located, and/or the downlink reference signal used for demodulation The corresponding RE on the antenna port where the downlink reference signal for demodulation is transmitted receives the PBCH;

The downlink reference signal used for tracking includes at least a cell-specific reference signal CRS for tracking, The downlink reference signal used for demodulation includes at least a downlink user-specific reference signal DRS or a CRS for demodulation.

The method according to claim 8, wherein the terminal corresponds to an antenna port on which the downlink reference signal for tracking is located based on a downlink reference signal for tracking included in the PBCH transmission resource. The resource unit RE, and/or the downlink reference signal for demodulation, in the RE corresponding to the antenna port on which the downlink reference signal for demodulation is transmitted, receives the PBCH, and specifically includes:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 Receiving, on the all REs in the PBCH transmission resource, the PBCH; or, in the PBCH transmission resource, except that the downlink reference signal used for tracking is on the antenna port where the downlink reference signal for tracking is located Receiving the PBCH on other REs other than the corresponding RE; or, in the PBCH transmission resource, except for the downlink reference signal used for demodulation on the antenna port where the downlink reference signal for demodulation is transmitted Receiving the PBCH on the RE other than the corresponding RE; or, in the PBCH transmission resource, except for the downlink reference signal used for demodulation on the antenna port where the downlink reference signal for demodulation is transmitted Corresponding RE, and a downlink reference signal for tracking, receiving the PBCH on another RE other than the corresponding RE on the antenna port where the downlink reference signal transmission is used; or, in the PBCH transmission The PBCH is received in the resource other than the RE corresponding to the RE on the antenna port 0; or, in the PBCH transmission resource, the DRS is transmitted in the DRS Receiving the PBCH on the other REs other than the corresponding REs on the K antenna ports; or, in the PBCH transmission resources, the REs corresponding to the D antennas on the K antenna ports where the DRS transmission is located, and The CRS receives the PBCH on an RE other than the corresponding RE on the antenna port 0;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 In the PBCH transmission resource, except CRS at antenna port 0, antenna port 1, antenna port 2, and antenna port

Receiving the PBCH on the other REs other than the corresponding RE; or, in the PBCH transmission resource, the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the CRS at the antenna port 0, the antenna The PBCH is received on the REs other than the corresponding REs on the port 1, the antenna port 2, and the antenna port 3.

 10. The method of claim 9 wherein:

 When the downlink reference signal used for demodulating the PBCH is DRS:

When the terminal receives the PBCH on all the REs in the PBCH transmission resource, the coded bit carried by the PBCH under the regular cyclic prefix CP and the extended CP is 2304 bits; or the terminal transmits the resource in the PBCH. The PBCH is received when the CRS is on the RE other than the corresponding RE on the antenna port 0, and the PBCH carries 2208 bits in the normal CP and 2112 bits in the extended CP; or The PBCH is carried by the PBCH under the regular CP and the extended CP when the PBCH is received by the terminal in the PBCH transmission resource except for the RE corresponding to the RE on the K antenna ports where the DRS transmission is located. The coded bits are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs on the K antenna ports where the DRS transmission is located in the PBCH transmission resource; or, the terminal transmits in the PBCH In addition to the DRS in the resource The corresponding REs on the K antenna ports where the DRS transmission is located, and the other REs other than the REs corresponding to the CRSs on the antenna port 0. When the PBCH is received, the coded bits carried by the PBCH under the normal CP are 48*[46] -B] bits, the coded bits carried in the extended CP are 48*[44-B] bits, where B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 The terminal in the PBCH transmission resource, except for the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the corresponding RE of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3. The other REs, when receiving the PBCH, the coded bits carried by the PBCH under the regular CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B] bits, where B The number of REs corresponding to the DRS on the antenna port where the DRS transmission is located in the PBCH transmission resource.

 The method according to claim 9 or 10, wherein when the terminal receives the PBCH, the method further comprises:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 The terminal receives the downlink reference signal for tracking and the PBCH in different subframes and/or physical resource blocks PRB, respectively, or the terminal receives the tracking in different subframes and/or PRBs respectively. CRS and the PBCH; and/or, in the PBCH transmission subframe and/or time slot, the OFDM symbol in which the PBCH transmission is located is different from the OFDM symbol in which the DRS transmission is located;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 Receiving, by the terminal, a CRS for demodulating a PBCH in the PBCH transmission subframe, or receiving a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe, or in the PBCH Receiving a CRS for demodulating a PBCH in a slot in which a PBCH transmission in a transmission subframe is received, or receiving a PBCH for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in a PBCH transmission subframe CRS, or receiving a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH in the PBCH transmission subframe, or for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe The CRS for demodulating the PBCH is received on the OFDM symbol.

 The method of claim 9, wherein when the terminal uses the P antenna port transmit diversity to receive the PBCH, the method further includes:

 Included in the PBCH transmission resource, the downlink reference signal for tracking and/or the downlink reference signal used for demodulation on the OFDM symbol of the corresponding RE on the antenna port on which the transmission is located, the vacant part of the available RE is not Receiving a PBCH, such that the number of REs used for transmitting the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is the OFDM symbol in the PBCH transmission resource except The tracking downlink reference signal and/or the downlink reference signal used for demodulation are other REs than the corresponding RE on the antenna port on which the transmission is located.

The method according to claim 12, wherein the terminal is excluded from the PBCH transmission resource When the CRS receives the PBCH on the RE other than the corresponding RE on the antenna port 0, the coded bits carried by the PBCH under the regular CP are 48*[46-A] bits, and the coded bits carried under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or,

 The PBCH is carried by the PBCH under the regular CP and the extended CP when the PBCH is received by the terminal in the PBCH transmission resource except for the RE corresponding to the RE on the K antenna ports where the DRS transmission is located. The coded bits are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; or

 And receiving, by the terminal, the PBCH in the PBCH transmission resource, except that the DRS is corresponding to the RE on the K antenna ports where the DRS transmission is located, and the REs corresponding to the REs corresponding to the CRS on the antenna port 0. The coded bits carried by the PBCH under the normal CP are 48*[46-BA] bits, and the coded bits carried under the extended CP are 48*[44-BA] bits, where Α is the number of vacated REs, Β The number of corresponding REs in the PBCH transmission resource on the K antenna ports where the DRS transmission is located.

 The method according to any one of claims 8 to 10, wherein the terminal receives the PBCH when the downlink reference signal used for demodulating the PBCH is DRS, and further includes :

 The terminal does not descramble the cyclic redundancy check CRC of the PBCH, and the number of antenna ports on which the DRS transmission for demodulating the PBCH is is a predetermined number of antenna ports; or

 Determining, by the terminal, the CRC of the PBCH according to the corresponding relationship between the number of antenna ports in which the DRS transmission for demodulating the PBCH is located and the scrambling sequence, where the scrambling sequence indicates that the PBCH is used for demodulation The number of antenna ports where the DRS transmission is located.

 A base station, the base station comprising:

 a resource mapping unit, configured to: in the PBCH transmission subframe, a resource element RE corresponding to the downlink reference signal for tracking included in the PBCH transmission resource, where the downlink reference signal for tracking is located, And/or a downlink reference signal for demodulation, performing resource mapping on the PBCH corresponding to an RE on an antenna port where the downlink reference signal used for demodulation is located; wherein the downlink reference for tracking The signal includes at least a cell-specific reference signal CRS for tracking, and the downlink reference signal for demodulation includes at least a downlink user-specific reference signal DRS or a CRS for demodulation;

 And a sending unit, configured to send the PBCH according to the resource mapping result.

 The base station according to claim 15, wherein the resource mapping unit is further configured to: when the downlink reference signal used for demodulating the PBCH is DRS:

Mapping the PBCH to all REs in the PBCH transmission resource; or mapping the PBCH to the PBCH transmission resource except for downlink reference signals for tracking in the downlink reference signal transmission for tracking Or the other REs other than the corresponding REs on the antenna port; or mapping the PBCH to the PBCH transmission resource, except for the downlink reference signal used for demodulation in the downlink reference signal transmission for demodulation Antenna Or the other REs other than the corresponding REs on the port; or mapping the PBCH to the PBCH transmission resource, except for the downlink reference signal used for demodulation in the antenna where the downlink reference signal for demodulation is transmitted a corresponding RE on the port, and a downlink reference signal for tracking on a RE other than the corresponding RE on the antenna port where the downlink reference signal for tracking is located; or mapping the PBCH to the The PBCH transmission resource is other than the RE corresponding to the RE on the antenna port 0; or the PBCH is mapped to the PBCH transmission resource, except that the DRS corresponds to the K antenna ports where the DRS transmission is located. Or mapping the PBCH to the PBCH transmission resource corresponding to the RE corresponding to the D antenna on the K antenna ports where the DRS transmission is located, and the CRS corresponding to the antenna port 0 On other REs other than RE;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 Mapping the PBCH to other REs of the PBCH transmission resource except for the corresponding REs of the CRS on antenna port 0, antenna port 1, antenna port 2, and antenna port 3; or mapping the PBCH to the The REs corresponding to the DRS on the antenna port where the DRS transmission is located, and the REs of the CRS other than the corresponding REs on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3 are described in the PBCH transmission resource.

 17. The base station of claim 16 wherein:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 When the resource mapping unit maps the PBCH to all the REs in the PBCH transmission resource, the PBCH carries 2304 bits under the regular cyclic prefix CP and the extended CP; or, the PBCH is in the resource mapping unit. When the PBCH is mapped to other REs other than the RE corresponding to the CRS on the antenna port 0, the PBCH carries 2208 bits of coded bits under the regular CP and 2112 bits of coded bits carried under the extended CP. Or, when the resource mapping unit maps the PBCH to the PBCH transmission resource, except that the DRS is on a RE other than the RE corresponding to the K antenna ports where the DRS transmission is located, the PBCH is in the regular CP and the extension. The coded bits carried in the CP are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs on the K antenna ports where the DRS transmission is located in the PBCH transmission resource; or, in the resource mapping The unit maps the PBCH to the PBCH transmission resource except for the RE corresponding to the D antenna on the K antenna ports where the DRS transmission is located, and the corresponding RE of the CRS on the antenna port 0. On other REs, the coded bits carried by the PBCH under the normal CP are 48*[46-B] bits, and the coded bits carried under the extended CP are 48*[44-B] bits, where B is the PBCH transmission resource. The number of REs corresponding to the K antenna ports on which the DRS transmission is located; when the downlink reference signal used for demodulating the PBCH is the CRS for demodulation:

Mapping the PBCH to the PBCH transmission resource in the resource mapping unit, except that the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the CRS at the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3 When the REs other than the corresponding REs, the coded bits carried by the PBCH under the normal CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B] bits, where B is the number of REs corresponding to the DRS on the antenna port where the DRS transmission is located in the PBCH transmission resource.

The base station according to claim 16 or 17, wherein the sending unit is further configured to: when the downlink reference signal used for demodulating the PBCH is DRS:

 Transmitting a downlink reference signal for tracking to the PBCH in a different subframe and/or a physical resource block PRB, or transmitting a CRS for tracking and the PBCH in different subframes and/or PRBs respectively; Or, in the PBCH transmission subframe and/or the time slot, the OFDM symbol in which the PBCH transmission is located is different from the OFDM symbol in which the DRS transmission is located;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 Transmitting a CRS for demodulating a PBCH in the PBCH transmission subframe, or transmitting a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe, or transmitting a subframe in the PBCH Transmitting a CRS for demodulating a PBCH in a slot in which the PBCH transmission is located, or transmitting a CRS for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in the PBCH transmission subframe, Or transmitting a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH in the PBCH transmission subframe, or an OFDM symbol for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe A CRS for demodulating the PBCH is transmitted.

 The base station according to claim 16, wherein the resource mapping unit is further configured to: when the transmitting unit transmits the PBCH by using P antenna port transmit diversity.

 Included in the PBCH transmission resource, the downlink reference signal for tracking and/or the downlink reference signal used for demodulation on the OFDM symbol of the corresponding RE on the antenna port on which the transmission is located, the vacant part of the available RE is not PBCH resource mapping is performed, so that the number of REs used for transmitting the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is the OFDM symbol in the PBCH transmission resource The downlink reference signal used for tracking and/or the RE reference signal for demodulation is other than the corresponding RE on the antenna port on which the transmission is located.

 The base station according to claim 19, wherein the resource mapping unit maps the PBCH to the PBCH transmission resource other than the RE corresponding to the RE on the antenna port 0 of the PBCH transmission resource, PBCH The coded bits carried in the conventional CP are 48*[46-A] bits, and the coded bits carried under the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or

 When the resource mapping unit maps the PBCH to the PBCH transmission resource, the PBCH is carried under the regular CP and the extended CP, except that the DRS is on the RE other than the RE corresponding to the K antenna ports where the DRS transmission is located. The coded bits are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; ,

Mapping, by the resource mapping unit, the PBCH to the PBCH transmission resource, except for the RE corresponding to the DRS on the K antenna ports where the DRS transmission is located, and the REs of the CRS corresponding to the RE corresponding to the antenna port 0 The coded bit carried by the PBCH under the regular CP is 48*[46-BA] bits, and the code carried under the extended CP The bit is 48*[44-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located.

 The base station according to any one of claims 15 to 17, wherein the transmitting unit is further configured to: when the downlink reference signal used for demodulating the PBCH is a DRS,

 The cyclic redundancy check CRC of the PBCH is not scrambled, and the number of antenna ports in which the DRS transmission for demodulating the PBCH is a predetermined number of antenna ports; or

 And scrambling a CRC of the PBCH according to a correspondence between a number of antenna ports in which the DRS transmission for demodulating the PBCH is located and a scrambling sequence, where the scrambling sequence indicates the DRS transmission for demodulating the PBCH The number of antenna ports in which it is located.

 22. A terminal, the terminal comprising:

 a receiving unit, configured to: according to the downlink reference signal for tracking included in the PBCH transmission resource, the corresponding resource unit RE on the antenna port where the downlink reference signal for tracking is located, and/or for demodulation The downlink reference signal receives the PBCH in the RE corresponding to the antenna port on which the downlink reference signal for demodulation is transmitted, where the downlink reference signal used for tracking includes at least a cell-specific reference signal CRS for tracking, The downlink reference signal used for demodulation includes at least a downlink user-specific reference signal DRS or a CRS for demodulation;

 An obtaining unit, configured to acquire carrier information according to the received PBCH.

 The terminal according to claim 22, wherein the receiving unit is further configured to:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 Receiving, on the all REs in the PBCH transmission resource, the PBCH; or, in the PBCH transmission resource, except that the downlink reference signal used for tracking is on the antenna port where the downlink reference signal for tracking is located Receiving the PBCH on other REs other than the corresponding RE; or, in the PBCH transmission resource, except for the downlink reference signal used for demodulation on the antenna port where the downlink reference signal for demodulation is transmitted Receiving the PBCH on the RE other than the corresponding RE; or, in the PBCH transmission resource, except for the downlink reference signal used for demodulation on the antenna port where the downlink reference signal for demodulation is transmitted Corresponding RE, and a downlink reference signal for tracking, receiving the PBCH on another RE other than the corresponding RE on the antenna port where the downlink reference signal transmission is used; or, in the PBCH transmission The PBCH is received in the resource other than the RE corresponding to the RE on the antenna port 0; or, in the PBCH transmission resource, the DRS is transmitted in the DRS Receiving the PBCH on the other REs other than the corresponding REs on the K antenna ports; or, in the PBCH transmission resources, the REs corresponding to the D antennas on the K antenna ports where the DRS transmission is located, and The CRS receives the PBCH on an RE other than the corresponding RE on the antenna port 0;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

Receiving, in the PBCH transmission resource, the PBCH on the REs other than the corresponding REs on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3; or, in the PBCH transmission resource except The DRS receives the PBCH corresponding to the RE on the antenna port where the DRS transmission is located, and the other REs of the CRS other than the corresponding REs on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3.

 24. The terminal of claim 23, wherein:

 When the downlink reference signal used for demodulating the PBCH is DRS:

 The receiving unit, when receiving the PBCH on all the REs in the PBCH transmission resource, the coded bit carried by the PBCH under the regular cyclic prefix CP and the extended CP is 2304 bits; or, the receiving unit is in the PBCH The PBCH is received in the transmission resource except that the CRS is on the RE other than the corresponding RE on the antenna port 0. The PBCH carries 2208 bits in the normal CP and 2112 bits in the extended CP. Or the receiving unit, in the PBCH transmission resource, except that the DRS receives the PBCH on the RE other than the RE corresponding to the K antenna ports where the DRS transmission is located, the PBCH is in the regular CP and the extension. The coded bits carried in the CP are 48*[48-B] bits, where B is the number of REs corresponding to the DRSs on the K antenna ports where the DRS transmission is located in the PBCH transmission resource; or, the receiving unit is The PBCH transmission resource receives the P in addition to the RE corresponding to the D antenna on the K antenna ports where the DRS transmission is located, and the REs corresponding to the REs corresponding to the CRS on the antenna port 0. In BCH, the coded bits carried by the PBCH under the normal CP are 48*[46-B] bits, and the coded bits carried under the extended CP are 48*[44-B] bits, where B is the DRS in the PBCH transmission resource. The number of corresponding REs on the K antenna ports where the DRS transmission is located;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

 The receiving unit, in the PBCH transmission resource, except for the RE corresponding to the DRS on the antenna port where the DRS transmission is located, and the corresponding RE of the CRS on the antenna port 0, the antenna port 1, the antenna port 2, and the antenna port 3. When the PBCH is received, the coded bits carried by the PBCH under the normal CP are 48*[40-B] bits, and the coded bits carried under the extended CP are 48*[36-B] bits, where B is the number of REs corresponding to the DRS in the PBCH transmission resource on the antenna port where the DRS transmission is located.

 The terminal according to claim 23 or 24, wherein the receiving unit is further configured to: when the downlink reference signal used for demodulating the PBCH is DRS:

 Receiving the downlink reference signal for tracking and the described in different subframes and/or physical resource blocks PRB

PBCH, or receiving the CRS for tracking and the PBCH in different subframes and/or PRBs respectively; and/or, in the PBCH transmission subframe and/or time slot, where the PBCH transmission is located The frequency division multiplexing OFDM symbol is different from the OFDM symbol in which the DRS transmission is located;

 When the downlink reference signal used for demodulating the PBCH is a CRS for demodulation:

Receiving a CRS for demodulating a PBCH in the PBCH transmission subframe, or receiving a CRS for demodulating a PBCH on a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe, or transmitting a subframe in the PBCH Receiving a CRS for demodulating a PBCH in a slot in which the PBCH transmission is located, or receiving a CRS for demodulating a PBCH in a PRB corresponding to a PBCH transmission RE in a slot of a PBCH in the PBCH transmission subframe, Or receiving a CRS for demodulating a PBCH on an OFDM symbol for transmitting a PBCH in the PBCH transmission subframe, or an OFDM symbol for transmitting a PBCH in a PRB corresponding to a PBCH transmission RE in the PBCH transmission subframe A CRS for demodulating the PBCH is received.

 The terminal according to claim 23, wherein when the receiving unit receives the PBCH by using P antenna port transmit diversity, the receiving unit is further configured to:

 Included in the PBCH transmission resource, the downlink reference signal for tracking and/or the downlink reference signal used for demodulation on the OFDM symbol of the corresponding RE on the antenna port on which the transmission is located, the vacant part of the available RE is not Receiving a PBCH, such that the number of REs used for transmitting the PBCH on the OFDM symbol is an integer multiple of P; wherein, P=2 or 4, the available RE is the OFDM symbol in the PBCH transmission resource except The tracking downlink reference signal and/or the downlink reference signal used for demodulation are other REs than the corresponding RE on the antenna port on which the transmission is located.

 The terminal according to claim 26, wherein the receiving unit receives the PBCH in the PBCH transmission resource except for the RE corresponding to the RE on the antenna port 0 of the CRS, PBCH The coded bits carried in the conventional CP are 48*[46-A] bits, and the coded bits carried in the extended CP are 48*[44-A] bits, where A is the number of vacated REs; or

 The receiving unit carries, in the PBCH transmission resource, other than the RE corresponding to the RE on the K antenna ports where the DRS transmission is located, when the PBCH is received, the PBCH is carried under the regular CP and the extended CP. The coded bits are 48*[48-BA] bits, where A is the number of vacated REs, and B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located; ,

 The receiving unit receives the PBCH in the PBCH transmission resource except for the RE corresponding to the DRS on the K antenna ports where the DRS transmission is located, and the REs other than the RE corresponding to the CRS on the antenna port 0. The PBCH carries 48*[46-BA] bits in the normal CP and 48*[44-BA] bits in the extended CP, where A is the number of vacated REs. B is the number of REs corresponding to the DRSs in the PBCH transmission resources on the K antenna ports where the DRS transmission is located.

 The terminal according to any one of claims 22 to 24, wherein the receiving unit is configured to: when the downlink reference signal used for demodulating the PBCH is a DRS,

 The cyclic redundancy check CRC of the PBCH is not descrambled, and the number of antenna ports in which the DRS transmission for demodulating the PBCH is a predetermined number of antenna ports; or

 Decoding the CRC of the PBCH according to a corresponding relationship between the number of antenna ports in which the DRS transmission for demodulating the PBCH is located and the scrambling sequence, the scrambling sequence indicating the DRS transmission for demodulating the PBCH The number of antenna ports in which it is located.