WO2013135129A1

WO2013135129A1 - Data transmission method, base station and user equipment

Info

Publication number: WO2013135129A1
Application number: PCT/CN2013/071714
Authority: WO
Inventors: 夏金环
Original assignee: 华为技术有限公司
Priority date: 2012-03-16
Filing date: 2013-02-21
Publication date: 2013-09-19
Also published as: CN103312650A; CN103312650B

Abstract

A data transmission method; the method comprises: obtaining the number N of orthogonal frequency division multiplexing (OFDM) symbols occupied by a physical downlink control channel domain; sending control signaling to a user equipment (UE), the control signaling comprising the N; according to the N, mapping an extended control channel and/or data channel at a resource position of a physical downlink shared channel (PDSCH), and sending control information and/or data on the extended control channel and/or data channel. The embodiments of the present invention enable the UE to know the number of OFDM symbols occupied by a conventional control channel domain and a mapping manner of time-frequency domain resources of the extended control channel on the data channel, thereby improving the utilization of the time-frequency resources.

Description

Data transmission method, base station and user equipment

The present application claims priority to Chinese Patent Application No. 201210071475.0, entitled "Data Transmission Method, Base Station, and User Equipment", filed on March 16, 2012, the entire contents of in.

Technical field

Embodiments of the present invention relate to the field of wireless communications, and more particularly, to data transmission methods, base stations, and user equipment. Background technique

In the Long Term Evolution (LTE) system of the 3rd Generation Partnership Project (3GPP), the User Equipment (UE) can support LTE full-band transmission. After the normal UE is powered on, it monitors the Synchronisation Signal (SS) from the six physical resource blocks (PRBs) of the entire frequency band, and then reads the physical downlink broadcast channel on the six central PRBs. The broadcast channel (PBCH for short) obtains configuration information such as a bandwidth and a physical hybrid automatic repeat request indicator (PHICH) from the PBCH, and monitors the physical downlink control channel (Physical Downlink Control Channel, according to the configuration information). Referred to as PDCCH), it receives system broadcasts, data, and the like according to the scheduling of the PDCCH. In the downlink direction, channels such as PDCCH and PHICH transmitted by the base station are all transmitted on the entire frequency band, and the system broadcast is also dynamically scheduled, that is, it may occupy any frequency band at any position of the resource block for transmission; in the uplink direction, the UE A physical uplink control channel (PUCCH) is usually transmitted at the upper and lower boundaries of the entire frequency band, and data is transmitted on the entire frequency band. For a narrowband UE, since the supported bandwidth is relatively small, for example, usually 1.4M, and the LTE system bandwidth is usually 10M or 20M, it is difficult for the narrowband UE to be under the above system bandwidth. Communicate with the base station and access the communication system. In an LTE system, an extended PDCCH (E-PDCCH) may be transmitted by using a time-frequency domain resource of a Physical Downlink Sharing Channel (PDSCH). Generally, the resources of the PDSCH region are multiplexed by using Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM) to transmit the E-PDCCH. In the TDM mode, the E-PDCCH is fixed to perform resource mapping starting from the 4th OFDM symbol of each subframe. However, the number of OFDM symbols occupied by the legacy PDCCH in each subframe may be flexibly set within 1 to 3 (when the downlink bandwidth is greater than 10 PRBs), so that the E-PDCCH is fixedly transmitted from the 4th OFDM symbol, which will cause Waste of resources. In the FDM mode, the E-PDCCH occupies all available OFDM symbols except the legacy PDCCH in the time domain. In this case, the UE needs to detect a Physical Control Format Indicator Channel (PCFICH), so as to know the number of OFDM symbols occupied by the legacy PDCCH, and further know that the E-PDCCH channel is from the OFDM in the time domain. The symbol begins. Since the narrowband UE cannot receive the PCFICH transmitted in the full band, it is impossible to obtain from which OFDM symbol the E-PDCCH starts in the time domain. If the E-PDCCH is fixedly transmitted from the 4th OFDM symbol for the narrowband UE, it also causes waste of spectrum resources.

Summary of the invention

The embodiment of the present invention provides a data transmission method, which enables a narrowband UE to learn the number of OFDM symbols occupied by the legacy PDCCH and the time-frequency domain resource mapping mode of the extended control channel and/or the data channel.

In one aspect, a data transmission method is provided, and the method includes:

Obtaining the number of orthogonal frequency division multiplexing OFDM symbols occupied by the physical downlink control channel domain;

Sending control signaling to the user equipment UE, where the control signaling includes the N;

According to the N, an extended control channel and/or a data channel is mapped on a resource location of the physical downlink shared channel PDSCH, and control information and/or data is transmitted on the extended control channel and/or data channel.

On the other hand, a data transmission method is provided, the method includes: acquiring an OFDM symbol number N occupied by a physical downlink control channel domain; And mapping, according to the N, an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and receiving control information and/or data on the extended control channel and/or data channel.

In another aspect, a base station is provided, the base station including:

An acquiring unit, configured to acquire an OFDM symbol number N occupied by a physical downlink control channel domain;

a sending unit, configured to send control signaling to the user equipment UE, where the control signaling includes the N;

a processing unit, configured to map, according to the N, an extended control channel and/or a data channel on a resource location of a physical downlink shared channel PDSCH, and by the sending unit on the extended control channel and/or data channel Send control information and/or data.

In another aspect, a user equipment is provided, where the user equipment includes:

Processing, according to the N, mapping an extended control channel and/or a data channel on a resource location of a physical downlink shared channel PDSCH, and transmitting control information and/or data on the extended control channel and/or data channel .

The embodiments of the present invention enable the narrowband UE to learn the number of OFDM symbols occupied by the legacy PDCCH and the time-frequency domain resource mapping manner of the extended control channel in the data channel, thereby providing a high utilization rate of time-frequency resources.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;

2 is a schematic diagram of a common band resource partitioned in a PDSCH region;

FIG. 3 is a schematic diagram of a resource mapping manner of narrowband indication channel information according to an embodiment of the present invention; Figure

4 is a schematic diagram of another narrowband indication channel information resource mapping manner according to an embodiment of the present invention;

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

6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic flow diagram of a data transmission method 100 in accordance with an embodiment of the present invention. As shown in Figure 1, method 100 includes:

Step 110: Obtain the number of OFDM symbols occupied by the PDCCH, N;

120: Send control signaling to the UE, where the control signaling includes the N;

130: Map, according to the N, an E-PDCCH and/or a data channel on a resource location of the PDSCH, and send control information and/or data on the E-PDCCH and/or the data channel.

The extended control channel is used to send control information, and the data channel is used to send data. The extended control channel E-PDCCH is a control channel divided in the original data channel portion, and is used as an extension of the original PDCCH for transmitting control signaling.

The method of the embodiment of the present invention is exemplified below in conjunction with a specific implementation manner.

The base station acquires the number N of OFDM symbols occupied by the PDCCH according to the system configuration, where N may be 1, 2, or 3.

After obtaining the number of OFDM symbols occupied by the PDCCH, the base station may send control signaling to the UE, where the control signaling includes the value of the N or the indication information corresponding to the value of the N, so that the UE knows the legacy PDCCH occupation. Number of OFDM symbols N. For example, the base station may send a control unit (Control Element, referred to as CE) of the broadcast signaling, the radio resource control (RRC) dedicated signaling, and the media access control (MAC). The control signaling is used to notify the UE of the number of OFDM symbols occupied by the legacy PDCCH. The number of OFDM symbols occupied by the legacy PDCCH remains unchanged for a period of time, that is, the case where each subframe is not indicated by the physical layer PCFICH channel, and resources are saved. . Moreover, the narrowband UE does not need to detect the PCFICH channel transmitted by the wideband, but obtains the number of OFDM symbols occupied by the legacy PDCCH channel through high layer signaling, thereby performing resource mapping of the E-PDCCH and/or the data channel used by the narrowband UE.

According to an embodiment of the present invention, the number N of OFDM symbols occupied by the legacy PDCCH may be indicated by a narrowband channel.

The traditional PDSCH area may be divided into one or a plurality of narrow-band frequency bands. As shown in FIG. 2, for example, a plurality of frequency band resources available to the UE are indicated by high-layer signaling, a broadcast channel, and the like, and a common frequency band resource is indicated to be used for transmitting the public. Information, such as paging, broadcasting, E-PDCCH public search space, etc. The UE may select one of the frequency bands to camp on, or the base station indicates to which narrowband resource the UE resides by, for example, RRC dedicated signaling. In an embodiment of the invention, for example, the UE may camp on a common frequency band to receive the downlink control channel and the data channel and the reference signal. The narrowband indication channel is mapped to each narrowband resource in the frequency domain, and the following description is made by taking a narrowband indication channel mapping in the common frequency band resource as an example.

The narrowband indication channel can be fixed to the UE on a common frequency band resource by various means. For example, a narrowband indicator channel is fixed to a plurality of subcarriers on the same OFDM symbol on a common band resource and transmitted to the UE. The narrowband indication channel information indicating the number N of specific OFDM symbols occupied by the legacy PDCCH may be mapped on the Kth OFDM symbol of each subframe in the time domain. In order to avoid conflict with the traditional PDCCH, #K>3 is selected here. The following describes a possible resource mapping method. For example, the Quadrature Phase Shift Keying (QPSK) modulation method includes 16 modulation symbols (each modulation symbol is mapped on a Resource Element (RE). Then, in the frequency domain, the 16 modulation symbols of the narrowband indication channel information can be equally divided into 4 Resource Element Groups (REGs). The four REGs are evenly distributed among the M PRBs on the fairband resources according to the cell-specific shift. For example, the positions occupied by the four REGs are:

M0=0+m;

Ml=floor(2M/4)+m;

M2=floor(2*2M/4)+m; M3=floor(3*2M/4)+m, where m is based on a preset cell shift, which is determined by: m=physical layer cell identifier mod 2M.

The preset cell shift described herein refers to the frequency domain offset, which is determined according to the cell identifier, and the floor function described here indicates rounding down.

Another possible resource mapping is to fix the information of the narrowband indicator channel on successive consecutive subcarriers. Referring to FIG. 3, the narrowband indication channel information indicating the specific OFDM symbol number N occupied by the legacy PDCCH may be mapped on the common available resource unit starting from the Kth subcarrier on the common frequency band resource in the time domain, where K A subcarrier number within a range defined by the bandwidth of the common band resource. For example, in a case where the information of the narrowband indication channel includes a plurality of OFDM symbols, in order to avoid interference with the legacy PDCCH, the OFDM symbols may start from the 4th OFDM symbol of the Kth subcarrier, according to the preemptive time domain available resource unit. The resource mapping is performed in the order of the available resource units in the frequency domain.

Another feasible resource mapping method is to use a mode similar to the reference signal to fix the information of the narrowband indicator channel on the resource unit of the common resource band. The narrowband indication channel information indicating the specific OFDM symbol number N occupied by the legacy PDCCH may be mapped on the resource element of the common frequency band resource closest to the reference signal in the time domain, and the correctness of the demodulation of the narrowband indication channel information is improved, the distance The resource unit closest to the reference signal refers to the same subcarrier adjacent OFDM symbol of the reference signal, or the same OFDM symbol adjacent subcarrier of the reference signal, which is described herein with reference to FIG. In Figure 4, R. And indicating a reference signal, S _k indicating narrowband indication channel information indicating a specific number OFDM of N occupied by the legacy PDCCH, mapped at a distance R. Or on the nearest resource unit, for example in the time domain (corresponding to the horizontal axis). Or on adjacent resource elements, that is, adjacent OFDM symbols, may also be mapped to R in the frequency domain (corresponding to the vertical axis). Or on adjacent resource elements, that is, on adjacent subcarriers.

According to an embodiment of the present invention, the number N of OFDM symbols occupied by the legacy PDCCH may also be indicated by scrambling different codewords on the reference signal. The reference signal herein may be a cell reference signal, or a user-specific demodulation reference signal. For example, if the reference signal sequence is b(i) and the information sequence of the narrowband indication channel is c(i), then the reference signal actually transmitted as the control command is

B(i)=(b(i)+c(i)) mod 2, i=0,l, ..., i - 1 , i is the number of bits of the narrowband indication sequence. According to an embodiment of the present invention, information indicating the number N of OFDM symbols occupied by the legacy PDCCH may be represented by 2 bits. QuaQuadrature Phase Shift Keying (abbreviation) QPSK) modulation mode, mapped into 16 QPSK modulation symbols, the coding method is shown in Table 1. N = 1 , 2, and 3 respectively indicate that the number of OFDM symbols occupied by the legacy PDCCH is 1, 2, and 3. Here, N=4 can also be used to indicate that the legacy PDCCH is not included in the subframe. Table 1

When the legacy PDCCH occupies 3 OFDM symbols, that is, N=3, the base station may not transmit the narrowband indication channel. At this time, the UE receives and demodulates the narrowband indication channel according to the foregoing resource mapping manner, and cannot correctly detect the indication information, and considers that the base station does not send the indication signal, and considers that the legacy PDCCH occupies 3 OFDM symbols, E-PDCCH or extension. The data channel is mapped starting from the 4th OFDM symbol.

According to the embodiment of the present invention, the base station may not notify the UE of the number of OFDM symbols occupied by the legacy PDCCH by means of the control command, but obtain the information by the UE blind detection method. Specifically, when detecting the control information or the data information in the common frequency band resource, the UE assumes that the number of OFDM symbols occupied by the legacy PDCCH may be any one of 1, 2, 3, and the UE receives and demodulates the E according to the resource mapping. - PDCCH or data channel, if the demodulation is wrong, continue to try another hypothesis, if the demodulation is correct, it means that the current hypothesis is correct.

The above is mainly to describe the implementation process of the method in the embodiment of the present invention from the base station side, and the basic flow of the method on the UE side is as shown in FIG. 5 . The data transmission method 500 according to an embodiment of the present invention includes:

510: Obtain the number of OFDM symbols occupied by the PDCCH, N;

520: Map an extended control channel and/or a data channel on a resource location of the PDSCH according to the N, and receive control information and/or data on the extended control channel and/or data channel.

According to the above, the number N of OFDM symbols occupied by the PDCCH is obtained, which may be control signaling sent by the receiving base station, where the control signaling includes the N. According to the above, the control signaling is at least one of the following: broadcast signaling, RRC dedicated signaling, MAC CE ₀

According to the above content, the acquiring the number N of OFDM symbols occupied by the PDCCH may be implemented as follows:

Receiving, by the base station, first control signaling, where the first control signaling is used to indicate that the UE receives downlink transmission in a common frequency band resource, where the common frequency band resource is determined by the base station in the PDSCH area i or ;

Receiving the information of the N on the common frequency band resource in response to the first control signaling. According to the above, the receiving the information of the N on the common frequency band resource specifically includes:

The information of the N is received on a Kth OFDM symbol on the common frequency band resource, wherein the K is greater than 3, and the information contained in the information of the N is evenly distributed on the plurality of physical resource blocks PRB.

According to the above, the information of the N includes 16 modulation symbols, and is divided into four resource unit groups REG based on the preset cell shift, thereby being evenly distributed to the M PRBs of the common narrowband resource, and the four REGs. The occupied PRB position is:

M0=0+m;

Ml=floor(2M/4)+m;

M2=floor(2*2M/4)+m;

M3=floor(3*2M/4)+m, where m is based on the preset cell shift and is determined by: m=physical layer cell identifier mod 2M.

According to the above, the receiving the information of the N on the common frequency band resource specifically includes:

Receiving, by the resource unit starting from the Kth subcarrier, the information of the N on the common frequency band resource, where the resource mapping manner is that the information of the N starts from the 4th OFDM symbol, according to the preemptive time domain available resource unit The resource mapping is performed in the order of the available frequency resource units in the frequency domain, where K is a subcarrier number within a range defined by the bandwidth of the common frequency band.

Receiving the letter of N on the resource unit closest to the reference signal on the common frequency band resource The resource element closest to the distance reference signal refers to the same subcarrier adjacent OFDM symbol of the reference signal, or the same OFDM symbol adjacent subcarrier of the reference signal.

According to the above, the acquiring the number N of OFDM symbols occupied by the PDCCH includes: receiving, by the base station, reference signals scrambled by different codewords, where the different codewords respectively correspond to different values of the N.

According to the above, the receiving the information of the N on the common frequency band resource specifically includes: performing blind detection on the control information or the data information received on the common frequency band resource, where the method specifically includes: respectively, according to the N The different values may be demodulated, and if the demodulation is correct, the N is determined.

According to the embodiment of the present invention, the narrowband UE can be informed of the number of OFDM symbols occupied by the legacy PDCCH and the time-frequency domain resource mapping manner of the extended control channel in the data channel. In this way, the resource mapping of the extended control channel and/or the data channel does not have to be fixedly started from the 4th OFDM symbol, but can be adjusted according to the number of OFDM symbols occupied by the legacy PDCCH, and the time control channel or data is improved. The channel is on the remaining OFDM symbols after the N OFDM symbols.

According to an embodiment of the present invention, a base station for implementing the data transmission method of the embodiment of the present invention is also proposed. As shown in FIG. 6, the base station 600 includes:

The acquiring unit 610 is configured to acquire an Orthogonal Frequency Division Multiplexing (OFDM) occupied by the PDCCH of the physical downlink control channel.

Number of OFDM symbols N;

The sending unit 620 is configured to send control signaling to the user equipment UE, where the control signaling includes the N;

The processing unit 630 is configured to map, according to the N, an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and the extended control channel and/or data by the sending unit 620 Control information and/or data is transmitted on the channel.

According to an embodiment of the present invention, the control signaling is at least one of the following: broadcast signaling, RRC dedicated signaling, and MAC CE.

According to an embodiment of the present invention, the processing unit 630 is further configured to determine a common frequency band resource in the PDSCH area, where the sending unit 620 is configured to send first control signaling to the UE, where the first control signaling is used. Instructing the UE to receive downlink transmissions in the common frequency band resource; the processing unit 630 is configured to carry information of the N on the common frequency band resource. According to an embodiment of the present invention, the processing unit 630 is configured to carry information of the N on a Kth OFDM symbol on the common frequency band resource, where the K is greater than 3, and the information of the N includes modulation The symbols are evenly distributed across multiple PRBs.

According to the embodiment of the present invention, the information of the N includes 16 modulation symbols, and is divided into four resource unit groups REG based on the preset cell shift, thereby being evenly allocated to the M PRBs of the common frequency band resource, where the 4 The PRB positions occupied by REGs are:

M0=0+m;

Ml=floor(2M/4)+m;

M2=floor(2*2M/4)+m;

According to the embodiment of the present invention, the processing unit 630 is configured to carry the information of the N on the resource unit starting from the Kth subcarrier on the common frequency band resource, where the resource mapping manner is the information of the N Starting from the 4th OFDM symbol, the resource mapping is performed according to the order in which the preemptive time domain available resource unit reoccupies the frequency domain available resource unit, where K is a subcarrier number within a range defined by the bandwidth of the common frequency band.

According to the embodiment of the present invention, the processing unit 630 is configured to carry the information of the N on a resource unit that is closest to the reference signal on the common frequency band resource, where the resource unit closest to the reference reference signal refers to the same reference signal. The subcarriers are adjacent OFDM symbols, or the same OFDM symbol adjacent subcarriers of the reference signal.

According to the embodiment of the present invention, the sending unit 620 is configured to send the different codewords to the UE.

Household equipment. As shown in FIG. 7, the user equipment 700 includes:

The acquiring unit 710 is configured to acquire the orthogonal frequency division multiplexing occupied by the PDCCH of the physical downlink control channel

Number of OFDM symbols N;

Processing unit 720, according to the N, mapping an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and receiving control information and/or on the extended control channel and/or data channel. data.

According to an embodiment of the present invention, the acquiring unit 710 is configured to receive control signaling sent by a base station, Wherein the control signaling includes the N.

According to the embodiment of the present invention, the acquiring unit 710 is configured to receive the first control signaling sent by the base station, where the first control signaling is used to indicate that the UE receives downlink transmission in a common frequency band resource, where the public frequency band resource Determining, by the base station, in the PDSCH area, according to an embodiment of the present invention, the acquiring unit 710 is configured to receive information of the N on a Kth OFDM symbol on the common frequency band resource, where the K If it is greater than 3, the information of the N includes modulation symbols that are allocated on multiple PRBs.

According to the embodiment of the present invention, the information of the N includes 16 modulation symbols, and is divided into four resource unit groups REG based on the preset cell shift, thereby being evenly distributed to the M PRBs of the common narrowband resource, where the 4 The PRB positions occupied by REGs are:

M0=0+m;

Ml=floor(2M/4)+m;

M2=floor(2*2M/4)+m;

According to the embodiment of the present invention, the acquiring unit 710 is configured to receive the information of the N on a resource unit that starts from the Kth subcarrier on the common frequency band resource, where the resource mapping manner is the information of the N Starting with 4 OFDM symbols, resource mapping is performed according to the order in which the pre-occupied time domain available resource units occupy the frequency domain available resource units, where K is a subcarrier number within a range defined by the bandwidth of the common frequency band.

According to the embodiment of the present invention, the acquiring unit 710 is configured to receive the information of the N on a resource unit that is closest to the reference signal on the common frequency band resource, where the resource unit closest to the reference reference signal refers to the same sub- Carrier adjacent OFDM symbols, or the same OFDM symbol adjacent subcarriers of the reference signal.

According to an embodiment of the present invention, the acquiring unit 710 is configured to receive a different codeword sent by the base station according to the embodiment of the present invention, where the acquiring unit 710 is configured to connect to the common frequency band resource. The blind detection of the received control information or the data information includes: demodulating according to the different possible values of the N, and determining the N if the demodulation is correct.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise. The components displayed for the unit may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium Including: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A data transmission method, the method comprising:

And mapping, according to the N, an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and transmitting control information and/or data on the extended control channel and/or data channel.

2. The method of claim 1 wherein

The control signaling is at least one of the following: broadcast signaling, radio resource control RRC dedicated signaling, and media access control MAC control unit CE.

3. The method of claim 1 wherein

The sending the control signaling to the user equipment UE includes:

Determining a common frequency band resource in the PDSCH region;

Sending, by the UE, first control signaling, where the first control signaling is used to indicate that the UE receives downlink transmissions in the common frequency band resource;

The information of the N is carried on the common frequency band resource to generate the control signaling, and the control signaling is sent to the UE.

4. The method of claim 3, wherein

Carrying the information of the N on the common frequency band resource, including:

The information of the N is carried on the Kth OFDM symbol on the common frequency band resource, where the K is greater than 3, and the information contained in the information of the N is evenly distributed on the plurality of physical resource blocks PRB.

5. The method of claim 4, wherein

The information of the N includes 16 modulation symbols, and is divided into 4 resource unit groups REG based on the preset cell shift, so as to be equally allocated to the M PRBs of the common frequency band resource, and the PRB positions occupied by the 4 REGs They are: M0=0+m;

Ml=floor(2M/4)+m;

M2=floor(2*2M/4)+m;

6. The method of claim 3, wherein

The information of the N is carried on the resource unit starting from the Kth subcarrier on the common frequency band resource, where the resource mapping manner is that the information of the N starts from the 4th OFDM symbol, according to the available resources in the preemptive time domain. The unit further performs resource mapping in the order of frequency domain available resource units, and the K is a subcarrier number within a range defined by the bandwidth of the common frequency band.

7. The method of claim 3, wherein

Carrying the information of the N on the resource unit closest to the reference signal on the common frequency band resource, where the resource unit closest to the reference reference signal refers to the same subcarrier adjacent OFDM symbol of the reference signal, or the same reference signal OFDM symbol adjacent subcarriers.

8. The method of claim 1 wherein

The sending the control signaling to the user equipment UE includes:

A reference signal scrambled with a different codeword is transmitted to the UE, wherein the different codewords respectively correspond to different values of the N.

A data transmission method, the method comprising:

And mapping, according to the N, an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and receiving control information and/or data on the extended control channel and/or data channel.

10. The method of claim 9 wherein: Obtaining the number N of OFDM symbols occupied by the control channel domain includes:

Receiving control signaling sent by the base station, where the control signaling includes the N.

11. The method of claim 10, wherein

The control signaling is at least one of the following: broadcast signaling, radio resource control, RRC dedicated signaling, and media access control, MAC control unit CE.

12. The method of claim 9 wherein:

Obtaining the number N of OFDM symbols occupied by the control channel domain includes:

And receiving, by the base station, the first control signaling, where the first control signaling is used to indicate that the UE receives the downlink transmission in the public frequency band resource, where the common frequency band resource is determined by the base station in the PDSCH area;

Receiving the information of the N on the common frequency band resource in response to the first control signaling.

13. The method of claim 12, wherein

The receiving the information of the N on the common frequency band resource includes:

14. The method of claim 13 wherein:

The information of the N includes 16 modulation symbols, and is divided into 4 resource unit groups REG based on the preset cell shift, so as to be equally allocated to the M PRBs of the common narrowband resource, and the PRB positions occupied by the 4 REGs For:

M0=0+m;

Ml=floor(2M/4)+m;

M2=floor(2*2M/4)+m;

15. The method of claim 12, wherein The receiving the information of the N on the common frequency band resource includes:

16. The method of claim 12, wherein

Receiving information of the N on a resource unit closest to the reference signal on the common frequency band resource, where the resource unit closest to the reference reference signal refers to the same subcarrier adjacent OFDM symbol of the reference signal, or the same OFDM of the reference signal Symbol adjacent subcarriers.

17. The method of claim 9 wherein:

Receiving, by the base station, reference signals scrambled by different codewords, wherein the different codewords respectively correspond to different values of the N.

18. The method of claim 12, wherein

Receiving the information of the N on the common frequency band resource, including:

Performing blind detection on the control information or the data information received on the common frequency band resource includes: demodulating according to the different possible values of the N, and determining the N if the demodulation is correct.

19. A base station, the base station comprising:

An acquiring unit, configured to acquire an orthogonal frequency division multiplexing OFDM symbol number N occupied by a physical downlink control channel domain;

a processing unit, configured to map, according to the N, an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and the extended control signal by the sending unit Control information and/or data is transmitted on the channel and/or data channel.

The base station according to claim 19, wherein the element is configured to send the first control signaling to the UE, where the first control signaling is used to indicate that the UE receives the downlink in the common frequency band resource. The processing unit is configured to carry the information of the N on the common frequency band resource.

21. The base station of claim 19, wherein:

The sending unit is configured to send, to the UE, a reference signal scrambled with different codewords, where the different codewords respectively correspond to different values of the N.

22. A user equipment, the user equipment comprising:

Processing unit, according to the N, mapping an extended control channel and/or a data channel on a resource location of the physical downlink shared channel PDSCH, and transmitting control information and/or data on the extended control channel and/or data channel .

23. The user equipment of claim 22, wherein

The acquiring unit is configured to receive control signaling sent by a base station, where the control signaling includes the

N.

24. The user equipment of claim 22, wherein

The acquiring unit is configured to receive first control signaling sent by the base station, where the first control signaling is used to indicate that the user equipment receives downlink transmission in a common frequency band resource, where the common frequency band resource is used by the base station Determined within the PDSCH region;

25. The user equipment of claim 22, wherein

The acquiring unit is configured to receive a reference signal that is sent by the base station and is scrambled by different codewords, where the different codewords respectively correspond to different values of the N.

26. The user equipment of claim 22, wherein

The acquiring unit is configured to perform blind detection on the control information or the data information received on the common frequency band resource, and perform demodulation according to different possible values of the N, and if the demodulation is correct, determine the location. Said N.