CN101778449B - A kind of downlink control information transmission method and base station - Google Patents

Abstract

The present invention provides a method for transmitting downlink control information. A base station carries downlink control information for scheduling a physical uplink shared channel in a downlink control information format and sends it to a terminal, wherein the downlink control information format is used for scheduling a component carrier. The physical uplink shared channel for single-antenna port transmission within a component carrier, and the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission within a component carrier is the same as the physical uplink control information format for scheduling multi-antenna port transmission within a component carrier The payload of the downlink control information format of the uplink shared channel is the same. The invention also provides a base station. The invention realizes the scheduling of the physical uplink shared channel transmitted by a single antenna port in a component carrier.

Description

Downlink control information transmission method and base station

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a downlink control information transmission method and a base station.

Background

In a 3gpp lte (The3rd generation partnership project long term evolution), a base station centralized scheduling method is used to control transmission of a Physical Uplink Shared Channel (PUSCH) of a User Equipment (UE).

Uplink scheduling information (uplink scheduling information) for a Physical Uplink Shared Channel (PUSCH) is transmitted to a target UE by a base station through a Physical Downlink Control Channel (PDCCH). The physical downlink control channel carries Downlink Control Information (DCI), which includes downlink/uplink scheduling information (downlink/uplink scheduling information), an uplink transmit power control command, and the like. According to different downlink control information, the LTE system defines a plurality of downlink control information formats (dciformats). The uplink scheduling information of the PUSCH is carried in the dci format 0(DCIformat 0). And if the UE detects the PDCCH with the DCIformat0 format, sending the PUSCH by adopting the indicated modulation coding mode and corresponding transmission power on the allocated channel resources according to the uplink scheduling information contained in the PDCCH.

The specific information contained in DCIformat0 is as follows:

-a flag to distinguish between DCIformat0 and DCIformat 1A;

-a frequency hopping flag bit;

-resource block allocation and frequency hopping resource allocation;

modulation Coding Scheme (MCS) and Redundancy Version (RV);

-new data indicator (Newdataindicator);

-transmit power control commands (tpccommandformscheduledpusch) for scheduled PUSCH;

-cyclic shift of demodulation reference signals (cyclicshiftforddmrs);

-an Uplink indication (ULindex), only present in a Time Division Duplex (TDD) system, for Uplink-downlink configuration (Uplink-downlink configuration) of 0;

-Downlink Assignment Index (DAI), only existing in the tdd system, for uplink and downlink configurations of 1-6;

-a channel quality indication request (CQIrequest);

in the LTE system, the physical uplink shared channel of multiple user terminals in a cell is frequency division multiplexed with the uplink system bandwidth, i.e. the PUSCHs of different UEs are orthogonal in the frequency domain. And the base station indicates the radio channel resources allocated by the PUSCH of the target UE in DCIformat 0.

The uplink resource allocation (resource allocation) of the LTE system is in units of Resource Blocks (RBs). The resource block is used to describe the mapping of a physical channel (physical channel) to a Resource Element (RE). Two resource blocks are defined: physical Resource Block (PRB) and Virtual Resource Block (VRB).

One physical resource block PRB occupies N in frequency domain_SC ^RBA number of consecutive subcarriers (subcarriers) occupying N in the time domain_symb ^ULA number of consecutive symbols. Wherein $N_{\mathrm{SC}}^{\mathrm{RB}}=12$ The subcarrier spacing is 15kHz, i.e. the width of one PRB in the frequency domain is 180 kHz. For a normal cyclic prefix (normalclicprefix, NormalCP), $N_{\mathrm{symb}}^{\mathrm{UL}}=7$ for extended cyclic prefix (extendedclicprefix, ExtendedCP), $N_{\mathrm{symb}}^{\mathrm{UL}}=6$ i.e. the length of one PRB in the time domain is one slot (0.5 ms). Thus, one PRB includes N_symb ^UL×N_SC ^RBAnd (4) a resource unit. In one time slot, the index of PRB in frequency domain is n_PRBWherein $n_{\mathrm{PRB}}=0,...,N_{\mathrm{RB}}^{\mathrm{UL}}-1$ ，N_RB ^ULthe number of PRBs corresponding to the bandwidth of the uplink system; the index pair of RE is (k, l), where, $k=0,...,N_{\mathrm{RB}}^{\mathrm{UL}}{N}_{\mathrm{sc}}^{\mathrm{RB}}-1$ in order to be indexed in the frequency domain, $l=0,...,N_{\mathrm{symb}}^{\mathrm{UL}}-1$ is a time domain index, then

Taking a conventional cyclic prefix as an example, the structure of the PRB is shown in fig. 1.

One virtual resource block VRB has the same structure and size as a PRB. Two types of VRBs are defined, distributedVRB (VirtualResourceblockSofdtributype) and centralized VRB (VirtualResourceblockSoflolizypype). When allocating resources, a pair of VRBs located in two time slots in a subframe (subframe) is allocated together, and the pair of VRBs has an index n_VRB。

Localized VRBs are mapped directly onto PRBs, i.e.

n_PRB＝n_VRB

The mapping of VRBs to PRBs is the same over two slots within one subframe.

The distributed VRBs are mapped to PRBs according to a certain rule,

n_PRB＝f(n_VRB，n_s)

wherein n is_s0, 19 is the slot number within one radio frame (frame, 10 ms). The mapping of VRBs to PRBs is different on two slots within one subframe.

As shown in fig. 2, in order to maintain the single carrier characteristic of the uplink signal, in the LTE system, the PUSCH employs a continuous resource allocation scheme, that is, the PUSCH of one UE occupies a continuous bandwidth in the frequency domain. The bandwidth is a part of the whole uplink system bandwidth and comprises a group of continuous PRBs, and the number of PRBs is M_RB ^PUSCHContaining the number of consecutive subcarriers of

$M_{\mathrm{sc}}^{\mathrm{PUSCH}}=M_{\mathrm{RB}}^{\mathrm{PUSCH}}\·N_{\mathrm{sc}}^{\mathrm{RB}}$

The base station gives a Resource Indication Value (RIV) in DCIformat 0. RIV indicates the starting position RB of a group of consecutive VRBs according to a tree representation method_STARTAnd length L_CRBsWherein, RB_STARTFor the index of the starting VRB in the set of consecutive VRBs, L_CRBsThe number of VRBs contained for the set of consecutive VRBs. The resource indication quantity isBit, N_RB ^ULThe number of resource blocks corresponding to the bandwidth of the uplink system.

In the LTE system, a physical uplink shared channel is transmitted using a single antenna port.

An LTE-Advanced system (LTE-a system for short) is a next-generation evolution system of the LTE system. As shown in fig. 3, the LTE-a system extends a transmission bandwidth by using a carrier aggregation (carrier aggregation) technique, and each aggregated carrier is referred to as a "component carrier". The multiple component carriers may be contiguous or non-contiguous, and may be located in the same frequency band (frequency band) or in different frequency bands.

In the LTE-a system, the physical uplink shared channel of the ue in one component carrier may adopt a continuous or discontinuous resource allocation manner. So-called continuous resource allocation, that is, similar to the LTE system, a physical uplink shared channel of a user equipment occupies a continuous bandwidth in one component carrier; the discontinuous resource allocation means that the physical uplink shared channel of the ue occupies multiple bandwidths in one component carrier, the bandwidths are discontinuous, each bandwidth includes a group of continuous PRBs, which is called a cluster (cluster), as shown in fig. 5.

The uplink discontinuous resource allocation of the LTE-A system can refer to the downlink resource allocation of the LTE system. Downlink resources of the LTE system are allocated with 3 types, type0, type1, and type2, where the type0 allocates channel resources in units of Resource Block Groups (RBGs). An RBG is defined as a set of contiguous PRBs, and the size P of a resource block group (RBGsize, i.e. the number of resource blocks contained in a resource block group) is a function of the system bandwidth. As shown in table 3, the LTE system bandwidth may be configured to be 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz, and the number of PRBs corresponding to each may be 6, 15, 25, 50, 75, and 100. According to different system bandwidths (with corresponding PRB number N_RB ^DLExpressed in terms of) the size of the resource block groups is also different, i.e. the granularity (granularity) of the resource allocation is different, see table 4.

TABLE 3LTE System Bandwidth

Channel bandwidth BWChannel[MHz](System Bandwidth)	1.4	3	5	10	15	20
							Transmission bandwidth configurationNRB(Transmission Bandwidth configuration)	6	15	25	50	75	100

Table 4 size of resource block group

System bandwidth NRB DL(#PRB)	RBG Size (Size of resource block group) P (# PRB)
		≤10	1
11-26	2
		27-63	3

64-110

4

Then, the number of resource block groups is

N_RBGThe indexes of the resource block groups are 0, a_RBG-1. Wherein, if $N_{\mathrm{RB}}^{\mathrm{DL}}\mathrm{mod}P=0$ Then the size of each resource block group is P; if it is not $N_{\mathrm{RB}}^{\mathrm{DL}}\mathrm{mod}P>0$ Then beforeThe size of each resource block group is P, and the size of the last 1 resource block group is P。

The resource allocation type0 indicates the allocated resource block group using a bitmap (bitmap), from index 0 to N_RBG-1 for each resource block group in turn corresponding to each bit from the most significant bit to the least significant bit in the bitmap, a bit of 1 indicating that the corresponding resource block group is allocated to the target user terminal and a bit of 0 indicating that it is not allocated to the target user terminal.

The resource allocation type1 indicates the allocated resource blocks by using a bitmap in a resource block group subset (RBGsubset, also called resource block subset) based on the type0, and has the same signaling overhead as the type 0.

Therefore, it is highly desirable to define a new downlink control information format for scheduling a physical uplink shared channel transmitted by a single antenna port with discontinuous resource allocation in the LTE-a system.

In addition, in the LTE-a system, the physical uplink shared channel may be transmitted through a single antenna port or through multiple antenna ports. Fig. 4 is a schematic diagram of processing a signal of a transmitting end baseband of a physical uplink shared channel transmitted by using multiple antenna ports in the conventional LTE-a. In multi-antenna port transmission, LTE-a supports spatial multiplexing based on one or two Codewords (CW), each Codeword corresponding to a Transport Block (TB).

When spatial multiplexing transmission based on two codewords is employed, there are two ways of mapping from transport block to codeword, namely TB1 to CW0, TB2 to CW1, and TB1 to CW1, TB2 to CW0, the latter being referred to as cross mapping from transport block to codeword.

LTE-a adopts a codebook (codebook) -based linear precoding technique (precoding), i.e., a transmitting end uses Channel State Information (CSI) to pre-process (precode) a transmitted signal. One way for the transmitting end to obtain the CSI is through feedback from the receiving end. In order to reduce the feedback overhead, a common method is to store the same codebook, i.e. the precoding matrix set, at the receiving end and the transmitting end. The receiving end selects a proper precoding matrix in the code book according to the current channel condition, and feeds back a precoding matrix index value (PMI) of the precoding matrix index value in the code book to the transmitting end, and the transmitting end finds the precoding matrix according to the fed-back precoding matrix index value and precodes the transmitted signal.

In an LTE-A uplink, a base station selects a proper precoding matrix in a code book according to the current channel condition, and carries a precoding matrix index value PMI in the code book and other uplink scheduling information in a certain downlink control information format and sends the precoding matrix index value PMI and other uplink scheduling information to a scheduled user terminal through a physical downlink control channel. And the user terminal finds a precoding matrix according to the detected precoding matrix index value in the downlink control information format and precodes the transmitted signal.

In the LTE-a system, when a physical uplink shared channel adopts multi-antenna port transmission, a demodulation reference signal (DMRS) of each layer of data is precoded as same as each layer of data. And the demodulation reference signals of different layer data, including the demodulation reference signals of multi-layer data of the same user terminal of a single-user multiple-input multiple-output system (SU-MIMO) and the demodulation reference signals of multi-layer data of a plurality of user terminals of a multi-user multiple-input multiple-output system (MU-MIMO), are orthogonalized by using different demodulation reference signal Cyclic Shifts (CS) and/or orthogonal masks (OCC). Wherein, the orthogonal mask OCC is [ +1, +1] and [ +1, -1], and acts on the demodulation reference signals on two slots within one subframe.

Therefore, at least one new downlink control information format is inevitably added to the LTE-a system for scheduling the physical uplink shared channel for multi-antenna port transmission.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a base station for transmitting downlink control information, where the downlink control information is used to schedule a physical uplink shared channel transmitted by a single antenna port or multiple antenna ports in a component carrier of an LTE-a system.

In order to solve the above problem, the present invention provides a downlink control information transmission method, in which a base station carries downlink control information for scheduling a physical uplink shared channel in a downlink control information format and sends the downlink control information to a terminal, wherein the downlink control information format is used for scheduling the physical uplink shared channel transmitted by a single antenna port in one component carrier, and the downlink control information format for scheduling the physical uplink shared channel transmitted by the single antenna port in one component carrier is the same as the payload of the downlink control information format for scheduling the physical uplink shared channel transmitted by multiple antenna ports in one component carrier.

Furthermore, the method can also have the following characteristics,

if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is different from the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission and/or the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same effective load; the payload includes an information bit number and a padding bit number of a downlink control information format.

Furthermore, the method can also have the following characteristics,

if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission or the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is equal to any one value in a group of preset values, filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission and the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the effective loads of the two are not equal to any one value in the group of preset values; the payload includes an information bit number and a padding bit number of a downlink control information format.

Furthermore, the method can also have the following characteristics,

(a1) if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is smaller than the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same effective load;

(a2) if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is equal to any one value in a set of preset values, padding bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is not equal to any one value in the set of preset values;

(a3) if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the two have the same payload;

or,

(b1) if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is smaller than the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the two have the same effective load;

(b2) if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is equal to any one value in a set of preset values, padding bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the payload of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is not equal to any one value in the set of preset values;

(b3) if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload.

Furthermore, the method can also have the following characteristics,

the pad bit is 0 bit.

Furthermore, the method can also have the following characteristics,

the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission in one component carrier comprises the following information:

the information processing apparatus may further include resource allocation information, modulation coding information, reference signal information, power control information, and channel quality indication request information, or may include resource allocation information, modulation coding information, reference signal information, power control information, channel quality indication request information, and time division duplex system specific information.

Furthermore, the method can also have the following characteristics,

the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission in one component carrier further includes at least one of the following information:

a downlink control information format flag bit for distinguishing the downlink control information formats of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission;

and (4) frequency hopping zone bits.

Furthermore, the method can also have the following characteristics,

the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in one component carrier comprises the following information:

the information processing method comprises the following steps of resource allocation information, modulation coding information, reference signal information, power control information, precoding information and channel quality indication request information, or comprises the resource allocation information, the modulation coding information, the reference signal information, the power control information, the precoding information, the channel quality indication request information and the time division duplex system special information.

Furthermore, the method can also have the following characteristics,

the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in one component carrier further includes at least one of the following information:

a downlink control information format flag bit for distinguishing the downlink control information formats of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission;

an orthogonal mask index of the demodulation reference signal for indicating an orthogonal mask used by the demodulation reference signal;

a single/dual transport block enable flag bit for indicating single transport block enable or dual transport block enable;

and the layer interleaving flag bit is used for indicating whether layer interleaving is enabled or not.

Furthermore, the method can also have the following characteristics,

the downlink control information format of the physical uplink shared channel used for scheduling single-antenna port or multi-antenna port transmission in one component carrier is used for distinguishing the downlink control information format of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission through cyclic redundancy check and mask of the downlink control information format.

The invention also provides a downlink control information transmission method, wherein the base station loads the downlink control information for scheduling the physical uplink shared channel in a downlink control information format and sends the downlink control information to the terminal, and the downlink control information format is used for scheduling the physical uplink shared channel of single-antenna port transmission and multi-antenna port transmission in one component carrier.

Furthermore, the method can also have the following characteristics,

if the information bit number of the downlink control information format is equal to any one value in a group of preset values, filling bits in the downlink control information format until the payload of the downlink control information format is not equal to any one value in the group of preset values, wherein the payload comprises the information bit number and the filling bit number of the downlink control information format.

Furthermore, the method can also have the following characteristics,

the pad bit is 0 bit.

Furthermore, the method can also have the following characteristics,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a single antenna port in a component carrier, the downlink control information format includes the following information:

the information processing apparatus may further include resource allocation information, modulation coding information, reference signal information, power control information, and channel quality indication request information, or may include resource allocation information, modulation coding information, reference signal information, power control information, channel quality indication request information, and time division duplex system specific information.

Furthermore, the method can also have the following characteristics,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a single antenna port in a component carrier, the downlink control information format further includes a frequency hopping flag bit.

Furthermore, the method can also have the following characteristics,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a single antenna port in a component carrier, information bits occupied by the information are removed from the downlink control information format, and if remaining information bits exist, the downlink control information format is set to be 0.

Furthermore, the method can also have the following characteristics,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by multiple antenna ports in a component carrier, the downlink control information format includes the following information:

the information processing method comprises the following steps of resource allocation information, modulation coding information, reference signal information, power control information, precoding information and channel quality indication request information, or comprises the resource allocation information, the modulation coding information, the reference signal information, the power control information, the precoding information, the channel quality indication request information and the time division duplex system special information.

Furthermore, the method can also have the following characteristics,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by multiple antenna ports in one component carrier, the downlink control information format further includes at least one of the following information:

an orthogonal mask index of the demodulation reference signal for indicating an orthogonal mask used by the demodulation reference signal;

a single/dual transport block enable flag bit for indicating single transport block enable or dual transport block enable;

and the layer interleaving flag bit is used for indicating whether layer interleaving is enabled or not.

Furthermore, the method can also have the following characteristics,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a multi-antenna port in a component carrier, information bits occupied by the information are removed from the downlink control information format, and if remaining information bits exist, the downlink control information format is set to be 0.

Furthermore, the method can also have the following characteristics,

the downlink control information format also comprises a single antenna/multi-antenna port transmission mode configuration flag bit for indicating that the physical uplink shared channel scheduled by the downlink control information format is transmitted by a single antenna port or transmitted by a multi-antenna port; or, the downlink control information format indicates, through cyclic redundancy check and a mask code of the downlink control information format, that the physical uplink shared channel scheduled by the downlink control information format is single-antenna port transmission or multi-antenna port transmission.

The invention also provides a base station, which carries downlink control information for scheduling the physical uplink shared channel in a downlink control information format and sends the downlink control information to a terminal, wherein the downlink control information format is used for scheduling the physical uplink shared channel transmitted by the single antenna port in one component carrier, and the downlink control information format for scheduling the physical uplink shared channel transmitted by the single antenna port in one component carrier is the same as the payload of the downlink control information format for scheduling the physical uplink shared channel transmitted by the multiple antenna ports in one component carrier.

Further, the base station may further have the following features,

the base station is further configured to, when the number of bits of the information in the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is different from the number of bits of the information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, fill bits in the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission and/or the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload; the payload includes an information bit number and a padding bit number of a downlink control information format.

Further, the base station may further have the following features,

the base station is configured to, when the number of bits of the information in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission or the number of bits of the information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is equal to any one of a set of preset values, fill bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission and the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the payloads of the two bits are not equal to any one of the set of preset values; the payload includes an information bit number and a padding bit number of a downlink control information format.

Further, the base station may further have the following features,

the base station is configured to, when the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is smaller than the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission, fill bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload;

when the number of information bits of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is equal to any one value in a set of preset values, padding bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is not equal to any one value in the set of preset values;

when the number of information bits of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, padding bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the two have the same payload;

or,

the base station is used for supplementing filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission when the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is smaller than the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same effective load;

when the number of information bits of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is equal to any one value in a set of preset values, padding bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the payload of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is not equal to any one value in the set of preset values;

and when the number of information bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is smaller than the payload in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission, padding bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload.

Further, the base station may further have the following features,

the pad bit is 0 bit.

Further, the base station may further have the following features,

the base station carries the following information in a downlink control information format of a physical uplink shared channel for scheduling single antenna port transmission in a component carrier:

the information processing apparatus may further include resource allocation information, modulation coding information, reference signal information, power control information, and channel quality indication request information, or may include resource allocation information, modulation coding information, reference signal information, power control information, channel quality indication request information, and time division duplex system specific information.

Further, the base station may further have the following features,

the base station also carries at least one of the following information in a downlink control information format of a physical uplink shared channel for scheduling single antenna port transmission in a component carrier:

a downlink control information format flag bit for distinguishing the downlink control information formats of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission;

and (4) frequency hopping zone bits.

Further, the base station may further have the following features,

the base station carries the following information in a downlink control information format of a physical uplink shared channel for scheduling multi-antenna port transmission in a component carrier:

the information processing method comprises the following steps of resource allocation information, modulation coding information, reference signal information, power control information, precoding information and channel quality indication request information, or comprises the resource allocation information, the modulation coding information, the reference signal information, the power control information, the precoding information, the channel quality indication request information and the time division duplex system special information.

Further, the base station may further have the following features,

the base station also carries at least one of the following information in a downlink control information format of a physical uplink shared channel for scheduling multi-antenna port transmission in a component carrier:

a downlink control information format flag bit for distinguishing the downlink control information formats of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission;

an orthogonal mask index of the demodulation reference signal for indicating an orthogonal mask used by the demodulation reference signal;

a single/dual transport block enable flag bit for indicating single transport block enable or dual transport block enable;

and the layer interleaving flag bit is used for indicating whether layer interleaving is enabled or not.

Further, the base station may further have the following features,

the base station is used for distinguishing the downlink control information formats of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission through the cyclic redundancy check and the mask code of the downlink control information formats.

The invention also provides a base station, which is used for bearing the downlink control information for scheduling the physical uplink shared channel in a downlink control information format and sending the downlink control information to the terminal, wherein the downlink control information format is used for scheduling the physical uplink shared channel of single-antenna port transmission and multi-antenna port transmission in one component carrier.

Further, the base station may further have the following features,

and the base station is used for supplementing filling bits in the downlink control information format when the information bit number of the downlink control information format is equal to any one value in a group of preset values until the effective load of the downlink control information format is not equal to any one value in the group of preset values, wherein the effective load comprises the information bit number and the filling bit number of the downlink control information format.

Further, the base station may further have the following features,

the pad bit is 0 bit.

Further, the base station may further have the following features,

the base station is configured to, when the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier, carry the following information in the downlink control information format:

the information processing apparatus may further include resource allocation information, modulation coding information, reference signal information, power control information, and channel quality indication request information, or may include resource allocation information, modulation coding information, reference signal information, power control information, channel quality indication request information, and time division duplex system specific information.

Further, the base station may further have the following features,

and the base station is used for carrying a frequency hopping flag bit in the downlink control information format when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a single antenna port in a component carrier.

Further, the base station may further have the following features,

and the base station is configured to remove information bits occupied by the information in the downlink control information format when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a single antenna port in a component carrier, and set 0 if remaining information bits exist.

Further, the base station may further have the following features,

the base station is configured to, when the downlink control information format is used to schedule a physical uplink shared channel transmitted by multiple antenna ports in one component carrier, carry the following information in the downlink control information format:

the information processing method comprises the following steps of resource allocation information, modulation coding information, reference signal information, power control information, precoding information and channel quality indication request information, or comprises the resource allocation information, the modulation coding information, the reference signal information, the power control information, the precoding information, the channel quality indication request information and the time division duplex system special information.

Further, the base station may further have the following features,

the base station is configured to, when the downlink control information format is used to schedule a physical uplink shared channel transmitted by multiple antenna ports in one component carrier, further carry at least one of the following information in the downlink control information format:

an orthogonal mask index of the demodulation reference signal for indicating an orthogonal mask used by the demodulation reference signal;

a single/dual transport block enable flag bit for indicating single transport block enable or dual transport block enable;

and the layer interleaving flag bit is used for indicating whether layer interleaving is enabled or not.

Further, the base station may further have the following features,

when the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a multi-antenna port in a component carrier, information bits occupied by the information are removed from the downlink control information format, and if remaining information bits exist, the downlink control information format is set to be 0.

Further, the base station may further have the following features,

the base station is configured to carry a single antenna/multiple antenna port transmission mode configuration flag bit in the downlink control information format, and is configured to indicate that a physical uplink shared channel scheduled by the downlink control information format is single antenna port transmission or multiple antenna port transmission; or, the method is used for indicating that the physical uplink shared channel scheduled by the downlink control information format is single-antenna port transmission or multi-antenna port transmission through cyclic redundancy check and mask of the downlink control information format.

The downlink control information format is used for scheduling a physical uplink shared channel transmitted by a single antenna port and/or multiple antenna ports in a component carrier of an LTE-A system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of a physical resource block structure of an LTE system (taking a conventional cyclic prefix as an example);

fig. 2 is a schematic diagram of a physical uplink shared channel structure of an LTE system (taking a conventional cyclic prefix as an example);

fig. 3 is a schematic diagram of carrier aggregation for LTE-a system;

fig. 4 is a schematic diagram of processing signals of a transmitting end baseband of a physical uplink shared channel transmitted by using multiple antenna ports in an LTE-a system;

fig. 5 is a schematic diagram of PUSCH discontinuous resource allocation in one component carrier of an LTE-a system.

Detailed Description

The present invention will be described in detail below with reference to examples and the accompanying drawings.

The invention provides a downlink control information transmission method.A base station loads downlink control information for scheduling a physical uplink shared channel in a downlink control information format and sends the downlink control information to a terminal. The format of the downlink control information is described in detail later.

The method comprises the following steps:

defining a downlink control information format (DCIformat) for scheduling a physical uplink shared channel (pucch) for single antenna port transmission in a component carrier of an LTE-a system, wherein:

the payload (payload) of the downlink control information format of the physical uplink shared channel transmitted by the single antenna port in one component carrier of the scheduling LTE-a system is the same as the payload of the downlink control information format of the physical uplink shared channel transmitted by the multiple antenna ports in one component carrier of the scheduling LTE-a system.

If the number of bits (the number of bits) of the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is different from the number of bits of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, padding bits (padding bits) in the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission and/or the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload;

if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission or the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is equal to any one value in a group of preset values, filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission and the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the effective loads of the two are not equal to any one value in the group of preset values.

It is possible in particular that,

the first method is as follows:

and if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is smaller than the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same effective load.

If the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is equal to any one value in a set of preset values, padding bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is not equal to any one value in the set of preset values.

If the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission (including the filling bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission), filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the two have the same payload;

the second method comprises the following steps:

and if the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is smaller than the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the two have the same payload.

If the information bit number of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is equal to any one value in a set of preset values, padding bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission until the payload of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission is not equal to any one value in the set of preset values.

If the information bit number of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission (including the filling bits in the downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission), filling bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload.

The pad bit may be a 0 bit.

In addition, the first method and the second method respectively comprise three steps, and the execution sequence of the three steps cannot be exchanged in each mode.

The payload of the downlink control information format comprises an information bit number and a filling bit number of the downlink control information format.

The types of uplink scheduling information carried by the downlink control information format for scheduling the physical uplink shared channel transmitted by a single antenna port in one component carrier of the LTE-a system include, but are not limited to:

resource allocation information;

modulating the encoded information;

reference signal information;

power control information;

time division duplex system specific information;

channel quality indication request information.

Wherein,

the modulation coding information includes:

-Modulation Coding Scheme (MCS) and Redundancy Version (RV), 5 bits;

-new data indicator (Newdataindicator), 1 bit;

the reference signal information includes:

-cyclic shift of demodulation reference signal (cyclicshiftforddmrs), 3 bits;

the power control information includes:

-transmit power control command (tpccommandformscheduledpusch) for scheduled physical uplink shared channel, 2 bits;

the tdd system specific information includes:

-an uplink indication (ulidex), existing only in time division duplex systems, for uplink and downlink configuration 0, 2 bits;

-Downlink Assignment Index (DAI), which is only present in tdd systems, for 2 bits when the uplink and downlink configurations are 1-6;

the channel quality indication request information includes:

-a channel quality indication request (CQIrequest);

1 bit, which is used to instruct a user terminal to non-periodically feed back a quantity related to channel quality through a physical uplink shared channel, including a Channel Quality Indicator (CQI), a Precoding Matrix Index (PMI), and a Rank Index (RI);

the downlink control information format further includes:

-downlink control information format flag bit

1 bit for distinguishing the downlink control information format of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission, wherein the value of 0 (or 1) represents that the downlink control information format is the downlink control information format of the physical uplink shared channel used for scheduling single-antenna port transmission, and the value of 1 (or 0) represents that the downlink control information format is the downlink control information format of the physical uplink shared channel used for scheduling multi-antenna port transmission.

Or the two downlink control information formats are distinguished by adding a MASK (MASK) to a Cyclic Redundancy Check (CRC) of the downlink control information formats.

-a frequency hopping flag bit (Hoppingflag); 1 bit;

the downlink control information format of the physical uplink shared channel transmitted by the single antenna port has the same effective load in one component carrier used for scheduling the LTE-A system, and the downlink control information format of the physical uplink shared channel transmitted by the multi-antenna port in one component carrier used for scheduling the LTE-A system at least comprises the following information:

resource allocation information;

modulating the encoded information;

reference signal information;

power control information;

precoding information;

time division duplex system specific information;

channel quality indication request information.

Wherein the modulation coding information comprises:

transport block 1(transport block1)

■ Modulation Coding Scheme (MCS) and Redundancy Version (RV)5 bits;

■ new data indicator (Newdataindicator)1 bit;

transport block 2(transport block2)

■ Modulation Coding Scheme (MCS) and Redundancy Version (RV)5 bits;

■ new data indicator (Newdataindicator)1 bit;

-transport block to codeword cross mapping flag bit (transfockdecotworwapflag), 1 bit;

the reference signal information includes:

-cyclic shift of demodulation reference signal (cyclicshiftforddmrs) 3 bits;

the power control information includes:

-transmit power control command (tpccommandformscheduledpusch) for scheduled physical uplink shared channel, 2 bits;

the precoding information (precoding information) includes:

-precoding information

The bit number of the precoding information according to the number of antenna ports of the user terminal is shown in table 6;

TABLE 6 number of bits of precoding information

Number of antenna ports atUE (Number of antenna ports of user terminal)	Number of bits for precoding information (Number of bits of precoding information)
		2	3
4	6

The tdd system specific information includes:

-an uplink indication (ulidex), existing only in time division duplex systems, for uplink and downlink configuration 0, 2 bits;

-Downlink Assignment Index (DAI), which is only present in tdd systems, for 2 bits when the uplink and downlink configurations are 1-6;

the channel quality indication request information includes:

-a channel quality indication request (CQIrequest);

1 bit for indicating a user terminal to non-periodically feed back the quantity related to the channel quality through a physical uplink shared channel, wherein the quantity includes a Channel Quality Indicator (CQI), a Precoding Matrix Index (PMI) and a Rank Index (RI);

the downlink control information format for scheduling the physical uplink shared channel transmitted by the multiple antenna ports further includes:

-downlink control information format flag bit

1 bit for distinguishing the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission and multi-antenna port transmission.

-orthogonal mask index of demodulation reference signal

1 bit for indicating an orthogonal mask used for a demodulation reference signal.

Single/double transport block enable flag bit, or single/double codeword enable flag bit

1 bit, the value of 0 (or 1) represents single transmission block enable, and the value of 1 (or 0) represents double transmission block enable.

When single transport block is enabled, transport block1 or transport block2 is indicated by a transport block to codeword cross-mapping flag bit.

Layer interleaving flag bit (Layershiftingflag, or layer interleaving enable bit)

1 bit for indicating whether layer interleaving is enabled.

And the downlink control information format is sent to the target user terminal by the base station through a physical downlink control channel.

The order of the above information in the format of the downlink control information is not limited to the order shown in the above description. The specific position of each piece of information in the downlink control information format can be set according to the system requirements.

The downlink control information formats of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission are different in resource allocation information, and the number of information bits occupied by the resource allocation information is different.

The second method comprises the following steps:

a downlink control information format (DCIformat) is defined and used for scheduling a physical uplink shared channel for single-antenna port transmission and multi-antenna port transmission in a component carrier of an LTE-A system.

And the downlink control information format is sent to the target user terminal by the base station through a physical downlink control channel.

If the physical uplink shared channel scheduled by the downlink control information format is transmitted by a single antenna port, the type of the uplink scheduling information carried by the downlink control information format comprises:

resource allocation information;

modulating the encoded information;

reference signal information;

power control information;

time division duplex system specific information;

channel quality indication request information. Wherein,

the modulation coding information includes:

-Modulation Coding Scheme (MCS) and Redundancy Version (RV)5 bits;

-new data indicator (Newdataindicator)1 bit;

the reference signal information includes:

-cyclic shift of demodulation reference signal (cyclicshiftforddmrs), 3 bits;

the power control information includes:

-transmit power control command (tpccommandformscheduledpusch) for scheduled physical uplink shared channel, 2 bits;

the tdd system specific information includes:

-an uplink indication (ulidex), existing only in time division duplex systems, for uplink and downlink configuration 0, 2 bits;

-Downlink Assignment Index (DAI), which is only present in tdd systems, for 2 bits when the uplink and downlink configurations are 1-6;

the channel quality indication request information includes:

-a channel quality indication request (CQIrequest);

1 bit, which is used to instruct the user terminal to feedback the quantity related to the channel quality through the physical uplink shared channel in a non-periodic manner;

if the physical uplink shared channel scheduled by the downlink control information format is transmitted by a single antenna port, the downlink control information format further includes:

-a frequency hopping flag bit (Hoppingflag), 1 bit;

if there are remaining information bits, all are set to 0.

If the physical uplink shared channel scheduled by the downlink control information format is multi-antenna port transmission, the uplink scheduling information type carried by the downlink control information format includes:

resource allocation information;

modulating the encoded information;

reference signal information;

power control information;

precoding information;

time division duplex system specific information;

channel quality indication request information.

Wherein the modulation coding information comprises:

transport block 1(transport block1)

■ Modulation Coding Scheme (MCS) and Redundancy Version (RV)5 bits;

■ new data indicator (Newdataindicator)1 bit;

transport block 2(transport block2)

■ Modulation Coding Scheme (MCS) and Redundancy Version (RV)5 bits;

■ new data indicator (Newdataindicator)1 bit;

-transport block to codeword cross mapping flag bit (transfockdecotworwapflag), 1 bit;

the reference signal information includes:

-cyclic shift of demodulation reference signal (cyclicshiftforddmrs), 3 bits;

the power control information includes:

-transmit power control command (tpccommandformscheduledpusch) for scheduled physical uplink shared channel, 2 bits;

the precoding information (precoding information) includes:

-precoding information

The bit number of the precoding information according to the number of antenna ports of the user terminal is shown in table 8;

TABLE 8 number of bits of precoding information

Number of antenna ports atUE (Number of antenna ports of user terminal)	Number of bits for precoding information (Number of bits of precoding information)
		2	3
4	6

The user terminal determines the codebook used, the number of layers upsilon (rank) of spatial multiplexing and the precoding matrix according to the number of antenna ports, the number of enabled codewords (i.e. the number of enabled transmission blocks) and the precoding information.

The tdd system specific information includes:

-an uplink indication (ulidex), existing only in time division duplex systems, for uplink and downlink configuration 0, 2 bits;

-Downlink Assignment Index (DAI), which is only present in tdd systems, for 2 bits when the uplink and downlink configurations are 1-6;

the channel quality indication request information includes:

-a channel quality indication request (CQIrequest);

1 bit, which is used to instruct the user terminal to feedback the quantity related to the channel quality through the physical uplink shared channel in a non-periodic manner;

if the downlink control information format is used for scheduling a physical uplink shared channel transmitted by a multi-antenna port, the downlink control information format further includes:

-orthogonal mask index of demodulation reference signal

1 bit for indicating an orthogonal mask used for a demodulation reference signal.

Single/double transport block enable flag bit, or single/double codeword enable flag bit

1 bit, the value of 0 (or 1) represents single transmission block enable, and the value of 1 (or 0) represents double transmission block enable.

A layer interleaving flag (or layer interleaving enable bit) 1 bit for indicating whether layer interleaving is enabled;

if there are remaining information bits, all are set to 0.

The downlink control information format further includes:

-single antenna/multiple antenna port transmission mode configuration flag bit

1 bit for indicating that the physical uplink shared channel scheduled by the downlink control information format is single-antenna port transmission or multi-antenna port transmission, a value of 0 (or 1) indicates that the physical uplink shared channel scheduled by the downlink control information format is single-antenna port transmission, and a value of 1 (or 0) indicates that the physical uplink shared channel scheduled by the downlink control information format is multi-antenna port transmission.

Or the downlink control information format indicates that the physical uplink shared channel scheduled by the downlink control information format is single-antenna port transmission or multi-antenna port transmission by adding a MASK (MASK) to a Cyclic Redundancy Check (CRC) of the downlink control information format.

If the information bit number of the downlink control information format is equal to any one value in a set of preset values, padding bits in the downlink control information format until the payload of the downlink control information format is not equal to any one value in the set of preset values.

The pad bit is 0 bit.

And the downlink control information format is sent to the target user terminal by the base station through a physical downlink control channel. And the downlink control information format bears downlink control information used for scheduling the physical uplink shared channel.

The positions of all the above information in the downlink control information format are variable.

When the downlink control information format schedules a physical uplink shared channel transmitted by a single antenna port and a physical uplink shared channel transmitted by a plurality of antenna ports, the resource allocation information in the downlink control information format is different, and the number of information bits occupied by the resource allocation information is different.

EXAMPLE 1

LTE-A system, working in frequency division duplex mode, the uplink system bandwidth of a component carrier uses the corresponding PRB number N_RB ^ULThe base station schedules a user terminal to send the physical uplink shared channel on the component carrier in a single antenna port transmission mode through the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission in the component carrier. Then, the downlink control information formatAs shown in table 6:

TABLE 6

The resource allocation information in the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission includes:

resource allocation header (resource allocation header)

1 bit for distinguishing between resource allocation type0 and type1, type0 being represented by 0 and type1 being represented by 1.

If the uplink system bandwidth N of the component carrier wave_RB ^ULIf the number of the physical resource blocks is less than or equal to 10, no resource allocation header exists, and the resource allocation type0 is adopted by default.

The resource allocation modes type0 and type1 are downlink resource allocation modes type0 and type1 of the LTE system respectively.

Resource block allocation (resource block allocation)

■ resource allocation type0

A bit indicating the allocated resource block group.

■ resource allocation type1

A bit as a header specific to the type1 mode for indicating the selected oneA subset of resource blocks;

1 bit for indicating whether a resource allocation range (theresourcealassociated span) is shifted (shift) in the selected resource block subset, wherein a value of 1 indicates shift triggering, and a value of 0 indicates no shift triggering;

bits for indicating allocated resource blocks.

Wherein the resource block group size P (RBGsize, i.e. the number of resource blocks contained in a resource block group) depends on the uplink system bandwidth N of the component carrier_RB ^ULAs shown in table 5.

TABLE 5

System Bandwidth of the component carrier NRB UL(#PRB)	RBG Size (Size of resource block group) P (# PRB)
		≤10	1
11-26	2
		27-63	3
64-110	4

The payload of the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is the same as the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in the component carrier, that is to say

The resource allocation information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission includes:

-resource block allocation

Bits for indicating allocated resource blocks.

Namely, the physical uplink shared channel transmitted by the multi-antenna port adopts continuous resource allocation. The user terminal has 4 antenna ports (antennas), and the precoding information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is 6 bits.

EXAMPLE two

LTE-A system, working in frequency division duplex mode, the uplink system bandwidth of a component carrier uses the corresponding PRB number N_RB ^ULThe base station schedules a user terminal to send the physical uplink shared channel on the component carrier in a single antenna port transmission mode through the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission in the component carrier. Then, the format of the downlink control information is shown in table 7:

TABLE 7

The resource allocation information in the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission only includes:

resource block allocation (resource block allocation)

A bit indicating the allocated resource block group.

The resource block group size P depends on the uplink system bandwidth N of the component carrier_RB ^ULAs shown in table 5.

The payload of the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is the same as the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in the component carrier, that is to say

The resource allocation information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission includes:

-resource block allocation

Bits for indicating allocated resource blocks.

Namely, the physical uplink shared channel transmitted by the multi-antenna port adopts continuous resource allocation.

The user terminal has 2 antenna ports, and the precoding information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission is 3 bits.

EXAMPLE III

LTE-A system, working in frequency division duplex mode, the uplink system bandwidth of a component carrier uses the corresponding PRB number N_RB ^ULThe base station schedules a user terminal to send the physical uplink shared channel on the component carrier in a single antenna port transmission mode through the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission in the component carrier. Then, the format of the downlink control information is shown in table 8:

TABLE 8

Wherein the resource block group size P depends on the uplink system bandwidth N of the component carrier_RB ^ULAs shown in table 5.

The payload of the downlink control information format is the same as the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in the component carrier, namely

EXAMPLE four

LTE-A system, working in frequency division duplex mode, the uplink system bandwidth of a component carrier uses the corresponding PRB number N_RB ^ULThe base station schedules a user terminal to send the physical uplink shared channel on the component carrier in a single antenna port transmission mode through the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission in the component carrier. Then, the format of the downlink control information is shown in table 9:

TABLE 9

For scheduling sheets

Number of bits

For scheduling multiple

Number of bits

Wherein the resource block group size P depends on the uplink system bandwidth N of the component carrier_RB ^ULAs shown in table 5.

The payload of the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is the same as the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in the component carrier, that is to say

The two downlink control information formats are distinguished by adding a MASK to a cyclic redundancy check CRC of the downlink control information formats.

EXAMPLE V

The LTE-A system works in a time division duplex mode, and the system bandwidth of one uplink component carrier wave uses the corresponding PRB number N_RB ^ULThe base station schedules a user terminal to send the physical uplink shared channel on the component carrier in a single antenna port transmission mode through the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission in the component carrier. Then, the format of the downlink control information is shown in table 10:

watch 10

Wherein the resource block group size P depends on the system bandwidth N of the uplink component carrier_RB ^ULAs shown in table 5.

The payload of the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is the same as the payload of the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in the uplink component carrier, that is to say

EXAMPLE six

LTE-A system, working in frequency division duplex mode, the uplink system bandwidth of a component carrier uses the corresponding PRB number N_RB ^ULThe base station schedules a user terminal to send the physical uplink shared channel on the component carrier in a single antenna port transmission mode or a multi-antenna port transmission mode through the downlink control information format of the physical uplink shared channel used for scheduling single antenna port transmission and multi-antenna port transmission in the component carrier. Then, the format of the downlink control information is shown in table 11:

TABLE 11

		Orthogonal mask indexing of numbers
						Precoding information	6
		Transmit power control commands for scheduled physical uplink shared channel	2
						Channel quality indication request	1
		Layer interleaved flag bit
				Surplus bit (set 0)	x	Surplus bit (set 0)	y
Stuffing bit (0 bit)	a		a

The payload of the downlink control information format is z bits, then

x＝z-(14+|N_RB ^UL/P|)-a

When the method is used for scheduling a physical uplink shared channel transmitted by a single antenna port, the resource allocation information in the downlink control information format includes:

resource allocation header (resource allocation header)

1 bit;

-resource block allocation

A bit.

The resource block group size P depends on the uplink system bandwidth N of the component carrier_RB ^ULAs shown in table 5.

Namely, the physical uplink shared channel transmitted by the single antenna port can adopt discontinuous resource allocation.

When the method is used for scheduling a physical uplink shared channel transmitted by multiple antenna ports, the resource allocation information in the downlink control information format includes:

-resource block allocation

Bits for indicating allocated resource blocks.

Namely, the physical uplink shared channel transmitted by the multi-antenna port adopts continuous resource allocation.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (24)

1. A method for transmitting downlink control information, characterized in that the base station carries downlink control information for scheduling a physical uplink shared channel in a downlink control information format and sends it to a terminal, wherein the downlink control information format is used for scheduling a The physical uplink shared channel for single-antenna port transmission in a component carrier, the downlink control information format for scheduling the physical uplink shared channel for single-antenna port transmission in a component carrier is the same as the format for scheduling multi-antenna port transmission in a component carrier The downlink control information format of the physical uplink shared channel is different, and the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier is different from the format of the physical uplink control information used to schedule the transmission of multiple antenna ports in a component carrier The payload of the downlink control information format of the shared channel is the same; Wherein, the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier includes the following information: Resource allocation information, modulation and coding information, reference signal information, power control information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, channel quality indication request information and time division duplexing system-specific information; The downlink control information format of the physical uplink shared channel for scheduling single-antenna port transmission in a component carrier also includes at least one of the following information: The downlink control information format flag bit is used to distinguish the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and multi-antenna port transmission; frequency hopping flag; Wherein, the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission in a component carrier includes the following information: Resource allocation information, modulation and coding information, reference signal information, power control information, precoding information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, precoding information, channel Quality indication request information and time division duplex system specific information; The downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission in a component carrier also includes at least one of the following information: The downlink control information format flag bit is used to distinguish the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and multi-antenna port transmission; The orthogonal mask index of the demodulation reference signal is used to indicate the orthogonal mask used by the demodulation reference signal; Single/double transmission block enable flag bit, used to indicate that single transmission block is enabled or double transmission block is enabled; Layer interleaving flag bit, used to indicate whether layer interleaving is enabled; The payload includes the number of information bits and the number of stuffing bits in the downlink control information format. 2. The method of claim 1, wherein If the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is different from the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission , filling bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and/or the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission until two have the same payload. 3. The method of claim 1, wherein, If the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission or the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is equal to Any one of a set of preset values, in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and the downlink control information of the physical uplink shared channel used to schedule multi-antenna port transmission The padding bits are padded in the format until the payload of the two is not equal to any value in the set of preset values. 4. The method of claim 1, further comprising: (a1) If the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is smaller than the information bits of the downlink control information format of the physical uplink shared channel used to schedule single antenna port transmission number, filling bits in the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission until the two have the same payload; (a2) If the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is equal to any one of a set of preset values, in the Fill bits in the downlink control information format of the transmitted physical uplink shared channel until the payload of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is not equal to the set of preset values any value in (a3) If the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is less than the payload of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission , filling bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission until the two have the same payload; or, (b1) If the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is smaller than the information bits of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission number, filling bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission until the two have the same payload; (b2) If the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is equal to any one of a set of preset values, in the Fill bits in the downlink control information format of the transmitted physical uplink shared channel until the payload of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is not equal to the set of preset values any value in (b3) If the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel used to schedule single antenna port transmission , filling bits in the downlink control information format of the physical uplink shared channel used for scheduling multi-antenna port transmission until the two have the same payload. 5. the method as claimed in claim 2 or 3 or 4 is characterized in that, The filling bits are 0 bits. 6. The method according to claim 1, wherein the downlink control information format of the physical uplink shared channel used to schedule single-antenna port or multi-antenna port transmission in a component carrier passes through the circulation of the downlink control information format The redundancy check is added with a mask to distinguish the downlink control information format of the physical uplink shared channel used for scheduling single-antenna port transmission and multi-antenna port transmission. 7. A downlink control information transmission method, characterized in that the base station sends downlink control information for scheduling a physical uplink shared channel to a terminal in a downlink control information format, and the downlink control information format is used to schedule a component carrier The physical uplink shared channel for internal single-antenna port transmission and multi-antenna port transmission is used to schedule the information included in the downlink control information format of the physical uplink shared channel for single-antenna port transmission within a component carrier. The downlink control information format of the physical uplink shared channel transmitted by the antenna port contains different information, and the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier is different from the format used to schedule multiple antenna ports in a component carrier. The payload of the downlink control information format of the physical uplink shared channel transmitted by the antenna port is the same; Wherein, when the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier, it includes the following information: Resource allocation information, modulation and coding information, reference signal information, power control information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, channel quality indication request information and time division duplexing system-specific information; When the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier, the downlink control information format also includes a frequency hopping flag bit; Wherein, when the downlink control information format is used to schedule a physical uplink shared channel transmitted by multiple antenna ports in a component carrier, it includes the following information: Resource allocation information, modulation and coding information, reference signal information, power control information, precoding information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, precoding information, channel Quality indication request information and time division duplex system specific information; When the downlink control information format is used to schedule the physical uplink shared channel transmitted by multiple antenna ports in a component carrier, it also includes at least one of the following information: The orthogonal mask index of the demodulation reference signal is used to indicate the orthogonal mask used by the demodulation reference signal; Single/double transmission block enable flag bit, used to indicate that single transmission block is enabled or double transmission block is enabled; Layer interleaving flag bit, used to indicate whether layer interleaving is enabled; The payload includes the number of information bits and the number of stuffing bits in the downlink control information format. 8. The method of claim 7, wherein, If the number of information bits in the downlink control information format is equal to any one of a set of preset values, fill bits in the downlink control information format until the payload of the downlink control information format is not equal to the set value Any one of the set of preset values described above. 9. The method of claim 8, wherein The filling bits are 0 bits. 10. The method of claim 7, wherein, When the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier, in the downlink control information format, the information bits occupied by the information are removed, and if there are remaining information bits, set 0. 11. The method of claim 7, wherein, When the downlink control information format is used to schedule the physical uplink shared channel transmitted by multiple antenna ports in a component carrier, in the downlink control information format, the information bits occupied by the information are removed, and if there are remaining information bits, set 0. 12. The method according to claim 7, wherein the downlink control information format further includes a single-antenna/multi-antenna port transmission mode configuration flag bit, which is used to indicate the physical uplink sharing of the downlink control information format scheduling The channel is single-antenna port transmission or multi-antenna port transmission; or, the downlink control information format indicates that the physical uplink shared channel scheduled by the downlink control information format is Single-antenna port transmission or multi-antenna port transmission. 13. A base station, characterized in that, the base station carries downlink control information for scheduling a physical uplink shared channel in a downlink control information format and sends it to a terminal, wherein the downlink control information format is used for scheduling a component The physical uplink shared channel for single-antenna port transmission in a carrier, the downlink control information format for scheduling the physical uplink shared channel for single-antenna port transmission in a component carrier is the same as the physical uplink control information format for scheduling multi-antenna port transmission in a component carrier The downlink control information format of the uplink shared channel is different, and the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier is the same as that of the physical uplink shared channel used to schedule the transmission of multiple antenna ports in a component carrier The payload of the downlink control information format of the channel is the same; The base station carries the following information in the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier: Resource allocation information, modulation and coding information, reference signal information, power control information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, channel quality indication request information and time division duplexing system-specific information; The base station further carries at least one of the following information in the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier: The downlink control information format flag bit is used to distinguish the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and multi-antenna port transmission; frequency hopping flag; Wherein, the base station carries the following information in the downlink control information format of the physical uplink shared channel used to schedule the multi-antenna port transmission in a component carrier: Resource allocation information, modulation and coding information, reference signal information, power control information, precoding information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, precoding information, channel Quality indication request information and time division duplex system specific information; The base station further carries at least one of the following information in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission in a component carrier: The downlink control information format flag bit is used to distinguish the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and multi-antenna port transmission; The orthogonal mask index of the demodulation reference signal is used to indicate the orthogonal mask used by the demodulation reference signal; Single/double transmission block enable flag bit, used to indicate that single transmission block is enabled or double transmission block is enabled; Layer interleaving flag bit, used to indicate whether layer interleaving is enabled; The payload includes the number of information bits and the number of stuffing bits in the downlink control information format. 14. The base station according to claim 13, wherein, The base station is also used for when the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and the downlink control information of the physical uplink shared channel used to schedule multi-antenna port transmission When the number of information bits of the format is different, in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and/or the downlink control information of the physical uplink shared channel used to schedule multi-antenna port transmission The padding bits are padded in the format until both have the same payload. 15. The base station according to claim 13, wherein, The base station is used for when the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission or the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission When the number of information bits is equal to any one of a set of preset values, in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission and the physical uplink shared channel used to schedule multi-antenna port transmission Padding bits are added to the downlink control information format of the uplink shared channel until the payloads of the two are not equal to any value in the set of preset values. 16. The base station of claim 13, wherein, The base station is used for when the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is smaller than the downlink control information format of the physical uplink shared channel used to schedule single antenna port transmission When the number of information bits is , fill bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission until the two have the same payload; It is also used when the number of information bits in the downlink control information format of the physical uplink shared channel used for scheduling multi-antenna port transmission is equal to any one of a set of preset values The downlink control information format of the physical uplink shared channel transmitted by the port is filled with padding bits until the payload of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is not equal to the set of preset any of the values; It is also used when the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission , filling bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission until the two have the same payload; or, The base station is used when the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is smaller than the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission For the number of information bits, padding bits are added to the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission until the two have the same payload; It is also used when the number of information bits in the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is equal to any value in a set of preset values, when the Fill bits in the downlink control information format of the physical uplink shared channel transmitted by the port, until the payload of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission is not equal to the set of preset any of the values; It is also used when the number of information bits of the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission is smaller than the payload of the downlink control information format of the physical uplink shared channel used to schedule single-antenna port transmission When , padding bits are added to the downlink control information format of the physical uplink shared channel used to schedule multi-antenna port transmission until the two have the same payload. 17. The base station according to claim 14 or 15 or 16, characterized in that, The filling bits are 0 bits. 18. The base station according to claim 13 or 14 or 15 or 16, characterized in that, the base station is configured to distinguish between the cyclic redundancy check and masking of the downlink control information format for scheduling single-antenna port transmission and the downlink control information format of the physical uplink shared channel transmitted by multiple antenna ports. 19. A base station, characterized in that the base station is configured to carry downlink control information for scheduling a physical uplink shared channel in a downlink control information format and send it to a terminal, and the downlink control information format is used to schedule a component The physical uplink shared channel for single-antenna port transmission and multi-antenna port transmission within a carrier is used to schedule the downlink control information format of the physical uplink shared channel for single-antenna port transmission within a component carrier. The information contained in the downlink control information format of the physical uplink shared channel transmitted by multiple antenna ports is different, and the downlink control information format of the physical uplink shared channel used to schedule the transmission of a single antenna port in a component carrier is different from the format used to schedule a single antenna port in a component carrier. The payload of the downlink control information format of the physical uplink shared channel transmitted by multiple antenna ports is the same; Wherein, the base station is configured to carry the following information in the downlink control information format when the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier: Resource allocation information, modulation and coding information, reference signal information, power control information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, channel quality indication request information and time division duplexing system-specific information; The base station is configured to carry a frequency hopping flag bit in the downlink control information format when the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier; Wherein, the base station is configured to carry the following information in the downlink control information format when the downlink control information format is used to schedule a physical uplink shared channel transmitted by multiple antenna ports in a component carrier: Resource allocation information, modulation and coding information, reference signal information, power control information, precoding information and channel quality indication request information, or including resource allocation information, modulation and coding information, reference signal information, power control information, precoding information, channel Quality indication request information and time division duplex system specific information; The base station is configured to carry at least one of the following information in the downlink control information format when the downlink control information format is used to schedule a physical uplink shared channel for multi-antenna port transmission in a component carrier: The orthogonal mask index of the demodulation reference signal is used to indicate the orthogonal mask used by the demodulation reference signal; Single/double transmission block enable flag bit, used to indicate that single transmission block is enabled or double transmission block is enabled; Layer interleaving flag bit, used to indicate whether layer interleaving is enabled; The payload includes the number of information bits and the number of stuffing bits in the downlink control information format. 20. The base station of claim 19, wherein The base station is configured to fill bits in the downlink control information format when the number of information bits in the downlink control information format is equal to any one of a set of preset values until the downlink control information The payload of the format is not equal to any value in the set of preset values. 21. The base station of claim 20, wherein, The filling bits are 0 bits. 22. The base station of claim 19, wherein The base station is configured to remove information bits occupied by the information in the downlink control information format when the downlink control information format is used to schedule a physical uplink shared channel transmitted by a single antenna port in a component carrier, Set to 0 if there are remaining information bits. 23. The base station of claim 19, wherein When the downlink control information format is used to schedule the physical uplink shared channel transmitted by multiple antenna ports in a component carrier, in the downlink control information format, the information bits occupied by the information are removed, and if there are remaining information bits, set 0. 24. The base station according to claim 19, wherein the base station is configured to carry a single-antenna/multi-antenna port transmission mode configuration flag bit in the downlink control information format to indicate that the downlink control information The format scheduled physical uplink shared channel is single-antenna port transmission or multi-antenna port transmission; or, it is used to indicate the physical uplink shared channel scheduled by the downlink control information format through the cyclic redundancy check and mask of the downlink control information format The channel is a single-antenna port transmission or a multi-antenna port transmission.