WO2012139512A1

WO2012139512A1 - Method and device for sending downlink control information

Info

Publication number: WO2012139512A1
Application number: PCT/CN2012/073938
Authority: WO
Inventors: 梁春丽; 戴博; 郁光辉; 郝鹏; 夏树强; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-15
Filing date: 2012-04-12
Publication date: 2012-10-18
Also published as: CN102740372B; CN102740372A

Abstract

Provided are a method and device for sending downlink control information, for solving the problem of how to send, receive and monitor the downlink control information in the LTE indoor hotspot coverage scenario. In the present invention, a base station sends a physical control head channel (PCHCH) and a physical downlink control channel (PDCCH) to UE. The PDCCH is indicated by the PCHCH, reducing or avoiding the process of blind detection of the PDCCH by the terminal in the LTE local area network, realizing the sending, receiving and monitoring of the downlink control information in the LTE indoor hotspot coverage scenario, and thus realizing transmission with low overhead, high rate and high reliability.

Description

Method and device for transmitting downlink control information

The present invention relates to the field of mobile wireless communications, and in particular, to a method and an apparatus for transmitting downlink control information in a wireless communication system. Background technique

The radio frame in the Long Term Evolution (LTE) system includes a frame structure of a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode. The frame structure of the FDD mode, as shown in Figure 1, a 10 msec (ms) radio frame consists of twenty slots of length 0.5 ms, numbered 0 to 19, and slots 2i and 2i+l. A subframe of length 1 ms (frame ) i. The composition of the TDD mode, one field includes five subframes of length lms, and subframe i is defined as two slots 2i and 2i+1 that are 0.5 ms long. In the above two frame structures, for a normal cyclic prefix (Normal CP, Normal Cyclic Prefix), one slot contains seven symbols with a length of 66.7 microseconds (us), and the CP of the first symbol has a length of 5.21 us. The remaining 6 symbols have a length of 4.69 us; for the extended cyclic prefix (Extended Cyclic Prefix), one slot contains 6 symbols, and the CP length of all symbols is 16.67 us.

The version number of LTE corresponds to R8 (Release 8), and the version number corresponding to the added version is R9 ( Release 9). The following three types of downlink physical control channels are defined in LTE: Physical Downlink Format Indicator Channel (PCFICH); Physical Hybrid Automatic Retransmission Request Indicator Channel (PHICH); physical downlink Control Channel (PDCCH, Physical Downlink Control Channel). The information carried by the PCFICH is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for transmitting the PDCCH in one subframe, and is sent on the first OFDM symbol of the subframe, where the frequency is located. Determined by the system downlink bandwidth and the cell ID (ID, Identity). Feed information. The number of PHICHs and the time-frequency location may be determined by a system message and a cell ID in a Physical Broadcast Channel (PBCH, Physical Broadcast Channel) of the downlink carrier where the PHICH is located.

The PDCCH is used for downlink control information (DCI, Downlink Control Information), and includes: uplink and downlink scheduling information, and uplink power control information. The DCI format (DCI format) is divided into the following types: DCI format 0, DCI format 1, DCI format 1 A, DCI format IB, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3 and DCI format 3A, etc.;

DCI format 0 is used to indicate scheduling of a Physical Uplink Shared Channel (PUSCH);

DCI format 1, DCI format 1 A, DCI format IB, DCI format 1 C, DCI format

ID is used for different modes of PDSCH codeword scheduling;

DCI format 2, DCI format 2A is used for different modes of space division multiplexing;

DCI format 3, DCI format 3 A is used for different modes of the power control command of the physical uplink control channel (PUCCH, Physical Uplink Control Channel) and PUSCH.

Physical downlink control channel Physical resources of the PDCCH transmission with control channel elements (CCE,

The Control Channel Element is a unit. The size of one CCE is 9 resource element groups (REG, Resource Element Group), that is, 36 resource elements. One PDCCH may occupy 1, 2, 4 or 8 CCEs. For the four PDCCH sizes occupying 1, 2, 4, and 8 CCEs, a tree aggregation (Aggregation) is adopted, that is, a PDCCH occupying one CCE can start from an arbitrary CCE position; a PDCCH occupying two CCEs is from an even number The CCE position starts; the PDCCH occupying 4 CCEs starts from the CCE position which is an integer multiple of 4; the PDCCH occupying 8 CCEs starts from the CCE position which is an integral multiple of 8. In a radio frame, if a regular CP (Cyclic Prefix) is used, the physical resources of the physical downlink control channel PDCCH can be carried on the first _ 3 OFDM symbols of the first slot of each subframe, and The remaining symbols can carry the physical resources of the PDSCH (Physical Downlink Shared Channel), as shown in FIG. 3.

Each Aggregation level defines a search space, including a common search space and a UE (User Equipment) proprietary (UE-Specific) search space. The number of CCEs in the entire search space is determined by the number of OFDM symbols and the number of groups of PHICHs occupied by the control region indicated by the PCFICH in each downlink subframe. The UE blindly detects all possible PDCCH code rates in the search space according to the DCI format of the transmission mode.

In the kth subframe, the control domain carrying the PDCCH is grouped by a number of 0 N _CCE , _k -1

N _CCE , _k ^ CCE constitutes. The UE should detect a group of candidate PDCCHs in each non-DRX (non-discontinuous reception) subframe to obtain control information. The detection refers to decoding the PDCCHs in the group according to all DCI formats to be detected. The candidate PDCCH (PDCCH candidate ) to be detected is defined in a search space manner, and the aggregation level Z e {1, 2, 4, 8}, the search space Sf) is determined by a group of candidate PDCCHs.

( PDCCH candidate ) definition. The CCE of the candidate PDCCH ( PDCCH candidate ) m in the search space Sf) is defined by:

Where = 0,..., - 1, = 0,- ",M ⁽ ) - 1 , Μ (" is the number of candidate PDCCH candidates ( PDCCH candidates ) to be tested in the search space.

For the common search space (common search space), = 0, L takes 4 and 8.

For the UE-specific search space, L takes 1, 2, 4, 8. Where }^ = ^^7 _≠ 0, ^ = 39827 , D = 65537 , = L /2", L" means round down, which is the slot number in a radio frame. 3⁄4^ is the corresponding RNTI (Radio Network Temporary Identifier;).

The UE should detect one common search space with aggregation levels of 4 and 8, and one UE-specific search space with aggregation levels of 1, 2, 4, and 8. The common search space and the UE-specific search space may overlap. The specific number of detections and the corresponding search space are as shown in Table 1:

Table 1

Due to the demand for indoor hotspot coverage technology, LTE hotspot coverage has gradually become a hot topic of discussion. Generally, LTE-LAN (LTE-Local Area Networks) can be used to refer to this technology. In the scenario of such indoor hotspot coverage, if the design of its control channel continues to follow the design of LTE, the terminal still needs to perform LTE-like PDCCH blind detection process, which is very disadvantageous for simplifying the implementation of the terminal. Therefore, in the scenario of such indoor hotspot coverage, the design of a new downlink control channel becomes an urgent problem to be solved. Summary of the invention

In view of the above, the main purpose of the present invention is to provide a method and an apparatus for transmitting downlink control information, which are used to solve the problem of how to perform downlink control information transmission, reception, and monitoring in an indoor hotspot coverage scenario of LTE. In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for transmitting downlink control information, the method includes:

The base station transmits, to the user equipment UE, a physical control head channel PCHCH and PDCCH carrying the physical downlink control channel PDCCH information.

The information carried by the PCHCH includes one or more of the following information: identifier information, PDCCH information corresponding to the identifier, and basic frame configuration information.

The identifier carried in the PCHCH includes one or more of the following identifiers: a UE identifier, a UE group identifier, a system information SI identifier, a paging Paging identifier, and a random access RA identifier.

The PDCCH information corresponding to the identifier carried by the PCHCH includes one or more of the following information: time domain location information of the PDCCH in the basic frame, aggregation level of the control channel element CCE, type of control information, PDCCH The modulation coding scheme MCS used.

The time domain location information of the PDCCH carried in the PCHCH in the basic frame is indicated by a signaling manner, or indicated by a predetermined rule.

The information carried in the PCHCH is cascaded in a predefined manner, and channel coding is performed by means of joint coding.

The PDCCH carries all uplink and/or downlink related control information. Further, the PDCCH carries uplink scheduling information, downlink scheduling information, uplink and downlink scheduling information, or power control information corresponding to the identifier carried by the PCHCH.

The PDCCH performs channel coding in an independent coding manner, and performs multi-antenna transmission in the form of a public reference signal or a proprietary reference signal.

Further, the time domain position of the PCHCH in the basic frame, the length of the carried information bits, and the modulation coding scheme used are fixed; or the time domain position of the PCHCH in the basic frame, the information bits carried The length and the modulation coding scheme used are indicated in the Physical Broadcast Channel (PBCH); or the time domain location of the PCHCH in the basic frame, the information ratio carried The special length and some of the information used in the modulation coding scheme are fixed, and other unfixed parts are indicated in the PBCH.

Further, the PCHCH adopts a master-slave structure, a time domain position of a primary PCHCH in a basic frame, a length of information bits carried, and an MCS are fixed or signaling configured, and a time domain position in the basic frame from the PCHCH. The length of the carried information bit and the MCS are indicated in the primary PCHCH; or the relationship between the PCHCH time domain location and the primary PCHCH time domain location is fixed, the length of the information bits carried from the PCHCH and the MCS are fixed, and are carried in the primary PCHCH. Information on whether or not there is a PCHCH.

When the PCHCH adopts a master-slave structure, the slave PCHCH does not contain basic frame information.

Based on the embodiment of the present invention, the present invention further provides a device for transmitting downlink control information, where the device includes:

a first sending module, configured to send, to the UE, a physical control head channel PCHCH carrying a physical downlink control channel PDCCH information;

a second sending module, configured to send a physical downlink control channel PDCCH to the UE;

In the method of the present invention, the base station sends the physical control head channel PCHCH and the physical downlink control channel PDCCH to the UE, and indicates the PDCCH through the PCHCH, which reduces or avoids the blind detection process of the PDCCH by the terminal in the LTE local area network, and implements the indoor hot spot in the LTE. In the coverage scenario, downlink control information is sent, received, and monitored to achieve low overhead, fast rate, and high reliability. DRAWINGS

1 is a schematic diagram of a frame structure of an FDD mode in the prior art of LTE;

2 is a schematic diagram of a frame structure of a TDD mode in the LTE prior art;

3 is a bit of a downlink control channel and a downlink shared channel in a conventional CP in the LTE prior art. Schematic diagram

4 is a schematic diagram of signaling of downlink control signaling according to the present invention;

FIG. 5 is a schematic diagram of another downlink control signaling transmission according to the present invention; FIG.

6 is a schematic diagram of another downlink control signaling transmission according to the present invention;

FIG. 7 is a schematic diagram of another downlink control signaling transmission according to the present invention. detailed description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Example 1

In the indoor hotspot coverage scenario of LTE or LTE-Advance, it can also be called LTE-LAN head channel) and PDCCH, where PCHCH can be sent in one of the following ways: Mode 1:

As shown in FIG. 4, the base station sends a PBCH, a PCHCH, and a PDCCH to the UE, where the PCHCH is fixed in the time domain start position in the basic frame, the bit length of the PCHCH carrying information, and the used MCS.

Further, the basic frame information carried by the PCHCH, the identifier information, and the PDCCH-related information corresponding to the identifier are concatenated in a predefined order to form a PCHCH transmission information packet, which is jointly coded by a fixed coding mode, and then used. The fixed modulation mode is modulated, and finally mapped to the PCHCH channel and sent to the UE.

Considering the importance and robustness of PCHCH, the preferred modulation scheme is Binary Phase Shift Keying (BPSK) or Quadrature Phase Shift Keying (QPSK);

The technical effect of the mode 1 is that the signaling overhead of the PBCH is not occupied, and the transmission efficiency is improved. Method 2:

As shown in FIG. 5, the base station sends a PBCH, a PCHCH, and a PDCCH to the UE, where the start time position of the PCHCH in the basic frame, the bit length of the PCHCH carrying information, and the used MCS are all indicated in the PBCH.

Further, the basic frame information carried by the PCHCH, the identifier information, and the PDCCH-related information corresponding to the identifier are concatenated in a predefined order to form a PCHCH transmission information packet, which is jointly coded by using a coding mode indicated by the PBCH, and then The modulation is performed by using the modulation mode indicated by the PBCH, and finally mapped to the PCHCH channel and transmitted to the UE.

Mode 2 Compared with mode 1, the technical effect is greater flexibility. Method 3:

As shown in FIG. 6, the base station sends a PBCH, a PCHCH, and a PDCCH to the UE, where the start time position of the PCHCH in the basic frame is fixed, the bit length of the PCHCH carrying information, and the used MCS are indicated in the PBCH.

Mode 3 is a compromise between modes 1 and 2. Considering that the location of the PBCH is fixed, the location of the PCHCH is also relatively fixed. Therefore, the location information of the PCHCH does not need to be indicated by the PBCH, and the overhead of occupying the PBCH is smaller than that of the mode 2. , relative to mode 1, the flexibility is greater. Therefore, mode 3 is the preferred solution. Way 4

As shown in FIG. 7, the base station sends a PBCH, a PCHCH, and a PDCCH to the UE, where one or two or more PCHCHs, one PCHCH is a primary PCHCH, and other PCHCHs are present. For the PCHCH, the time domain location of the primary PCHCH in the basic frame, the length of the information bits carried, and the MCS are fixed or signaled, and the time domain location of the PCHCH in the basic frame, the length of the information bits carried. And the MCS indicates in the primary PCHCH, or the relationship between the PCHCH time domain location and the primary PCHCH time domain location is fixed, the length of the carried information bits and the MCS are fixed, and the primary PCHCH carries information about whether the PCHCH exists.

Further, the basic frame information carried by the primary PCHCH, the identifier information, and the PDCCH-related information corresponding to the identifier, and the information related to the PCHCH are cascaded in a predefined order to form a primary PCHCH transmission packet, using the PBCH. The coding mode of the indication is jointly coded, then modulated by the modulation mode indicated by the PBCH, and finally mapped to the primary PCHCH channel and transmitted to the UE.

Or the basic frame information carried by the primary PCHCH, the identifier information, and the PDCCH-related information corresponding to the identifier, and the information related to the PCHCH are concatenated in a predefined order to form a transmission packet of the primary PCHCH, using a predefined The coded modulation mode is mapped to the primary PCHCH channel and sent to the UE.

Further, the information related to the PCHCH includes one or more of a PCHCH presence, a PCHCH time-frequency location, a PCHCH transmission block size, and a PCHCH modulation mode, and is not limited thereto;

Further, when the information related to the PCHCH is only the presence or absence of the PCHCH, the time-frequency position of the PDCCH and the primary PCHCH time-frequency position relationship are fixed, for example: continuous mapping from the PCHCH to the primary PCHCH, occupying the physical resource size and the transmitted information. The block size and code modulation mode are all predefined;

Compared with other methods, the PCHCH can be configured more flexibly, and can be grouped according to different users. The PDCCH-related information of each user in the same group can be jointly coded together, so that downlink resources can be more effectively utilized. The identifier carried in the PCHCH includes but is not limited to one or more of the following identifiers: a UE identifier, a UE group identifier, a system information (SI: System Information) identifier, and a paging (Paging) identifier. , random access (RA: Random Access) identifier.

When the identifier carried in the PCHCH is the UE identifier, the UE having the UE identifier performs PDCCH detection according to the PDCCH information corresponding to the UE identifier; when the identifier carried in the PCHCH is When the UE group identifier is used, all UEs having the UE group identifier perform PDCCH detection according to the PDCCH information corresponding to the UE group identifier.

When the identifier carried in the PCHCH is an SI identifier, all UEs in the cell will perform PDCCH detection according to the PDCCH information corresponding to the SI identifier.

When the identifier carried in the PCHCH is a Paging identifier, the UE having the Paging identifier performs PDCCH detection according to the PDCCH information corresponding to the Paging identifier.

When the identifier carried in the PCHCH is an RA identifier, the UE having the RA identifier performs PDCCH detection according to the PDCCH information corresponding to the RA identifier; and the PDCCH related information corresponding to the identifier includes the PDCCH. Time domain location information in a basic frame, an aggregation level of a Control Channel Element (CCE: Control Channel Element), a type of control information, one of a modulation coding scheme (MCS: Modulation Coding Scheme) used by the PDCCH, or Various, therefore, the UE can reduce the number of PDCCH blind detections according to the obtained PDCCH related information. Example 3

The time domain location information of the PDCCH carried in the PCHCH in the basic frame may be indicated by signaling, or may be indicated by a predetermined rule.

The predetermined rule is equivalent to determining a location of the PDCCH corresponding to the identifier according to the identifier and the basic frame index according to a predetermined method; Example 4

The PDCCH carries the uplink and/or downlink related control information of all the UEs. Further, the information carried by the PDCCH is uplink scheduling information, or downlink scheduling information, or uplink and downlink scheduling information corresponding to the identifier carried by the PCHCH. , or power control information.

The PDCCH corresponding to the identifier carried by the PCHCH is channel coded by means of independent coding.

The PDCCH corresponding to the identifier carried by the PCHCH may be transmitted in multiple antennas in the form of a public reference signal or a proprietary reference signal.

The physical resource location of the PDCCH may be consecutive X subcarriers and consecutive y orthogonal frequency division multiplexing (OFDM) symbols in the time domain (partial time-frequency positions may be skipped, and relatively consecutive after removing these positions), or may be Having an entire frequency band of consecutive z OFDM symbols or a partial discontinuous frequency band occupying consecutive z OFDM symbols; or, the physical resource location of the PDCCH is a discontinuous time-frequency location;

The PDCCH carries a proprietary demodulation reference signal; Embodiment 5

Based on the foregoing embodiment, the present invention further provides a device for transmitting downlink control information, where the device is located at a base station, and includes: a first sending module, configured to send, to the UE, a physical control head channel PCHCH carrying information indicating a physical downlink control channel PDCCH;

The terminal receives the PCHCH and receives the PDCCH according to the indication of the PCHCH, so as to reduce or avoid the blind detection process of the PDCCH by the terminal in the LTE local area network, and implement the transmission, reception, and monitoring of the downlink control information in the indoor hotspot coverage scenario of the LTE, and further Achieve low overhead, fast rate and high reliability of transmission. Since the device is based on the above method embodiment, the The indication information and the format of the indication information carried by the PCHCH, and the transmission mode of the PCHCH can be directly derived from the foregoing embodiments. To save space, no further details are provided herein.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by instructions to the associated hardware, which may be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk. Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented by using a software function module. Formal realization. The invention is not limited to any specific form of combination of hardware and software.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the invention. Industrial applicability

In the present invention, the base station sends the physical control head channel PCHCH and the physical downlink control channel PDCCH to the UE, and indicates the PDCCH through the PCHCH, which reduces or avoids the blind detection process of the PDCCH by the terminal in the LTE local area network, and implements the indoor hotspot coverage scenario in the LTE. The transmission, reception, and monitoring of downlink control information are performed, thereby achieving low overhead, fast rate, and high reliability transmission.

Claims

Claim

A method for transmitting downlink control information, the method comprising:

The base station transmits, to the user equipment UE, a physical control head channel PCHCH indicating a physical downlink control channel PDCCH information and a physical downlink control channel PDCCH.

2. The method according to claim 1, wherein the information carried by the physical control head channel PCHCH includes one or more of the following information: identifier information, a physical downlink control channel PDCCH corresponding to the identifier Information, basic frame configuration information.

3. The method according to claim 2, wherein the identifier carried in the physical control head channel PCHCH includes one or more of the following identifiers: a user equipment UE identifier, a user equipment UE group identifier, System Information SI Identifier, Paging Paging Identifier, Random Access RA Identifier.

4. The method according to claim 2, wherein the physical downlink control channel PDCCH information corresponding to the identifier carried by the physical control head channel PCHCH includes one or more of the following information: physical downlink control channel The time domain location information of the PDCCH in the basic frame, the aggregation level of the control channel element CCE, the type of control information, and the modulation and coding scheme MCS used by the physical downlink control channel PDCCH.

The method according to claim 4, wherein the physical downlink control channel PDCCH carried in the physical control head channel PCHCH is indicated by signaling in a time domain location information in a basic frame, or by a predetermined rule. Way of indicating.

The method according to claim 1, wherein the information carried in the physical control head channel PCHCH is cascaded in a predefined manner, and channel coding is performed by joint coding.

7. The method of claim 2, wherein the physical downlink control channel PDCCH carries all uplink and/or downlink related control information.

The method according to claim 2 or 7, wherein the physical downlink control channel PDCCH carries uplink scheduling information, downlink scheduling information, uplink and downlink scheduling information, or uplink and downlink scheduling information corresponding to an identifier carried by the physical control head channel PCHCH. Power control information.

The method according to claim 2, wherein the physical downlink control channel PDCCH is channel coded in an independent coding manner.

10. The method of claim 2, wherein the physical downlink control channel PDCCH is transmitted in multiple antennas in the form of a public reference signal or a proprietary reference signal.

11. The method according to claim 1, wherein

The physical control head channel PCHCH is fixed in the time domain position in the basic frame, the length of the information bits carried, and the modulation coding scheme used; or

The physical control head channel PCHCH indicates the time domain position in the basic frame, the length of the carried information bits, and the modulation coding scheme used in the physical broadcast channel PBCH; or

The physical control head channel PCHCH is fixed in the time domain position in the basic frame, the length of the carried information bits, and a part of the modulation coding scheme used, and other unfixed parts are indicated in the physical broadcast channel PBCH.

12. The method according to claim 1, wherein

The physical control head channel PCHCH adopts a master-slave structure, the time domain location of the primary physical control head channel in the basic frame, the length of the carried information bits, and the modulation and coding scheme MCS are fixed or signaled, and physical control The time domain location of the head channel in the basic frame, the length of the information bits carried, and the modulation and coding scheme MCS are indicated in the primary physical control head channel; or from the physical control head channel time domain location and the primary physical control head channel time domain location The relationship between the information is fixed, and the length of the information bits carried by the physical control head channel and the modulation and coding scheme MCS are fixed. The primary physical control head channel carries information about whether the physical control head channel exists.

The method according to claim 12, wherein when the physical control head channel PCHCH adopts a master-slave structure, the slave physical control head channel does not include basic frame information.

14. A transmitting device for downlink control information, the device comprising:

a first sending module, configured to send, to the user equipment UE, a physical control head channel PCHCH carrying information indicating a physical downlink control channel PDCCH;

a second sending module, configured to send a physical downlink control channel PDCCH to the user equipment UE; the information carried by the physical control head channel PCHCH includes one or more of the following information: identifier information, corresponding to the identifier Physical downlink control channel PDCCH information and basic frame configuration information.

15. The apparatus according to claim 14, wherein

The identifier carried in the physical control head channel PCHCH includes one or more of the following identifiers: user equipment UE identifier, user equipment UE group identifier, system information SI identifier, paging Paging identifier, random Access the RA identifier;

The physical downlink control channel PDCCH information corresponding to the identifier carried by the physical control head channel PCHCH includes one or more of the following information: time domain location information of the physical downlink control channel PDCCH in a basic frame, and a control channel The aggregation level of the unit CCE, the type of control information, and the modulation and coding scheme MCS used by the physical downlink control channel PDCCH.

The device according to claim 15, wherein the first sending module indicates the physical downlink control channel PDCCH carried in the physical control head channel PCHCH in a basic frame by means of signaling or a predetermined rule. Time domain location information in .

The device according to claim 14, wherein the first sending module cascades information carried in the physical control head channel PCHCH according to a predefined manner, and associates the physical control head channel by means of joint coding. The information carried in the PCHCH is channel coded.

18. The apparatus according to claim 14, wherein

The time domain location of the physical control head channel PCHCH in the basic frame, and the information bits carried The length and the modulation coding scheme used are indicated in the physical broadcast channel PBCH; or the time domain location of the physical control head channel PCHCH in the basic frame, the length of information bits carried, and part of the modulation coding scheme used The information is fixed, and other unfixed parts are indicated in the physical broadcast channel PBCH.

19. The apparatus according to claim 14, wherein

The first sending module sends the physical control head channel PCHCH according to the master-slave structure, the time domain location of the primary physical control head channel in the basic frame, the length of the carried information bits, and the modulation and coding scheme MCS are fixed or signaling. Configured, and the time domain location in the basic frame from the physical control head channel, the length of the carried information bits, and the modulation and coding scheme MCS are indicated in the primary physical control head channel;

Or the relationship between the time domain location of the physical control head channel and the time domain location of the primary physical control head channel is fixed, and the length of the information bits carried by the physical control head channel and the modulation and coding scheme MCS are fixed, and are carried in the primary physical control head channel. Information from whether the physical control head channel exists; when the physical control head channel PCHCH adopts a master-slave structure, the slave physical control head channel does not include basic frame information.