CN101778449A - Method for transmitting downlink control information and base station thereof - Google Patents

Abstract

The invention provides a method for transmitting downlink control information (DCI) and a base station thereof for loading the DCI used for scheduling physical uplink shared channels (PUSCH) into a DCI format and sending the DCI to a terminal, wherein the DCI format is used for scheduling the PUSCH transmitted by a single-antenna port in a component carrier, and the payload size of the DCI format used for scheduling the PUSCH transmitted by the single-antenna port in the component carrier is identical with that of the DCI format used for scheduling the PUSCH transmitted by a multi-antenna port in the component carrier. The invention further provides a base station. The invention achieves the scheduling of the PUSCH transmitted by the single-antenna port in the 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 (The 3rd Generation Partnership Project Long term evolution, third Generation Partnership Project Long term evolution) system, a base station centralized scheduling manner is adopted 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 from a base station to a target UE through a Physical Downlink Control Channel (PDCCH). The physical Downlink Control channel (pdcch) carries Downlink Control Information (DCI), which includes Downlink/uplink scheduling Information (Downlink/uplink scheduling Information), an uplink transmission power Control command, and the like. According to different downlink control information, the LTE system defines a plurality of downlink control information formats (DCI formats). The uplink scheduling information of the PUSCH is carried in the downlink control information format 0(DCIformat 0). And if the UE detects the PDCCH with the DCI format 0 format, sending the PUSCH by adopting the indicated modulation coding mode and corresponding transmitting power on the allocated channel resources according to the uplink scheduling information contained in the PDCCH.

Specific information contained in the DCI format 0 is as follows:

-a flag bit for distinguishing DCI format 0 and DCI format 1A;

-a frequency hopping flag bit;

-resource block allocation and frequency hopping resource allocation;

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

-a New data indicator (New data indicator);

-transmit power control commands (TPC command scheduled PUSCH) for the scheduled PUSCH;

-Cyclic shift for DM RS of demodulation reference signals;

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

-Downlink Assignment Index (DAI), which exists only in tdd systems, for uplink and Downlink configurations of 1-6;

-a channel quality indication request (CQI request);

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 resource allocated to the PUSCH of the target UE in DCI format 0.

The uplink Resource allocation (Resource allocation) of the LTE system is in units of Resource Blocks (RBs). Resource blocks are used to describe the mapping of Physical channels (Physical channels) to Resource Elements (REs). 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 continuous sub-carrier (subcarrier) occupying in the time domainN_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 (Normal cp), $N_{\mathrm{symb}}^{\mathrm{UL}}=7$ for Extended cyclic prefix (Extended CP), $N_{\mathrm{symb}}^{\mathrm{UL}}=6$ 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, distributed VRBs (virtual resource blocks of distributed type) and centralized VRBs (virtual resource blocks of localized type). 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

<math><mrow><msubsup><mi>M</mi><mi>sc</mi><mi>PUSCH</mi></msubsup><mo>=</mo><msubsup><mi>M</mi><mi>RB</mi><mi>PUSCH</mi></msubsup><mo>&CenterDot;</mo><msubsup><mi>N</mi><mi>sc</mi><mi>RB</mi></msubsup></mrow></math>

The base station gives a Resource Indication Value (RIV) in the DCI format 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 is

Bit, 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. The downlink resource allocation of the LTE system has 3 modes, namely type 0, type1 and type 2, wherein the type 0 is a resource blockA Resource Block Group (RBG) allocates channel resources in units of groups. An RBG is defined as a set of contiguous PRBs, and the size P of a resource block group (RBG size, i.e. the number of resource blocks contained by 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 is 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 3 LTE 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 resource block group size

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 before

The size of each resource block group is P, and the size of the last 1 resource block group is P。

The resource allocation type 0 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.

Based on type 0, the resource allocation type1 uses a bitmap to indicate allocated resource blocks in a resource block group subset (RBG subset, also called resource blocks subset) by taking a resource block as a unit, 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 transmission 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 (DM RS) 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 (DCI format) 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 size) of the downlink control information format of the physical uplink shared channel transmitted by the single antenna port in one component carrier of the 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 LTE-A system.

If the number of information bits in the downlink control information format of the physical uplink shared channel for scheduling single antenna port transmission is different from the number of information bits in the downlink control information format of the physical uplink shared channel for scheduling multi-antenna port transmission, padding bits (padding bits) are padded 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 (New data indicator), 1 bit;

the reference signal information includes:

-Cyclic shift for DM RS of demodulation reference signal, 3 bits;

the power control information includes:

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

the tdd system specific information includes:

-an uplink indication (UL index) only in time division duplex systems for 2 bits when the uplink and downlink configuration is 0;

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

the channel quality indication request information includes:

-a channel quality indication request (CQI request);

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 Indicator (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 Hopping flag (Hopping flag); 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 block 1) pair

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

■ New data indicator (New data indicator)1 bit;

-to transport block 2(transport block 2)

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

■ New data indicator (New data indicator)1 bit;

transport block to codeword cross mapping flag bit (Transport block to code word swapflag), 1 bit;

the reference signal information includes:

-Cyclic shift for DM RS 3 bits of demodulation reference signal;

the power control information includes:

-transmit power control command (TPCcommand for scheduled PUSCH) 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 (UL index) only in time division duplex systems for 2 bits when the uplink and downlink configuration is 0;

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

the channel quality indication request information includes:

-a channel quality indication request (CQI request);

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 block 1 or transport block 2 is indicated by a transport block to codeword cross-mapping flag bit.

Layer shifting flag 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 (DCI format) is defined, which is used for scheduling a physical uplink shared channel for single-antenna port transmission and multi-antenna port transmission in one 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;

-a New data indicator (New data indicator)1 bit;

the reference signal information includes:

-Cyclic shift for DM RS of demodulation reference signal, 3 bits;

the power control information includes:

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

the tdd system specific information includes:

-an uplink indication (UL index) only in time division duplex systems for 2 bits when the uplink and downlink configuration is 0;

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

the channel quality indication request information includes:

-a channel quality indication request (CQI request);

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 Hopping flag bit (Hopping flag), 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 block 1) pair

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

■ New data indicator (New data indicator)1 bit;

-to transport block 2(transport block 2)

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

■ New data indicator (New data indicator)1 bit;

transport block to codeword cross mapping flag bit (Transport block to code word swapflag), 1 bit;

the reference signal information includes:

-Cyclic shift for DM RS of demodulation reference signal, 3 bits;

the power control information includes:

-transmit power control command (TPCcommand for scheduled PUSCH) 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 index, the number of layers upsilon (rank) of spatial multiplexing and the precoding matrix to be used according to the number of antenna ports, the number of enabled codewords (i.e. the number of enabled transport blocks) and the precoding information.

The tdd system specific information includes:

-an uplink indication (UL index) only in time division duplex systems for 2 bits when the uplink and downlink configuration is 0;

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

the channel quality indication request information includes:

-a channel quality indication request (CQI request);

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.

Layer shifting 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 format of the downlink control information is 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 type 0 and type1, type 0 being denoted by 0 and type1 being denoted by 1.

If the uplink system bandwidth N of the component carrier wave_RB ^ULAnd if the number of the physical resource blocks is less than or equal to 10, no resource allocation header exists, and the resource allocation mode type 0 is adopted by default.

The resource allocation modes type 0 and type1 are downlink resource allocation modes type 0 and type1 of the LTE system respectively.

Resource block allocation (Resource block assignment)

■ resource allocation type 0

A bit indicating the allocated resource block group.

■ resource allocation type1

A bit, as a type1 specific header, for indicating the selected resource block subset;

1 bit for indicating whether the resource allocation 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 size P (RBG size, 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 (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 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 assignment)

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 (40)

1. A downlink control information transmission method is characterized in that 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, wherein the downlink control information format is used for scheduling the physical uplink shared channel transmitted by a single antenna port in a component carrier, and the downlink control information format for scheduling the physical uplink shared channel transmitted by the single antenna port in the component carrier is the same as the effective load of the downlink control information format for scheduling the physical uplink shared channel transmitted by a plurality of antenna ports in the component carrier.

2. The method of claim 1,

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.

3. The method of claim 1,

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.

4. The method of claim 1, wherein the method further comprises:

(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.

5. The method of claim 2 or 3 or 4,

the pad bit is 0 bit.

6. The method of claim 1, wherein a downlink control information format for scheduling physical uplink shared channel for 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.

7. The method of claim 6, wherein the downlink control information format for scheduling the physical uplink shared channel for 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.

8. The method of claim 1, wherein a downlink control information format for scheduling physical uplink shared channel for 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.

9. The method of claim 8, wherein the downlink control information format for scheduling physical uplink shared channel for 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.

10. The method according to one of claims 6 to 9, wherein the downlink control information format for scheduling physical uplink shared channel for single antenna port or multiple antenna port transmission within one component carrier is distinguished from the downlink control information format for scheduling physical uplink shared channel for single antenna port transmission and multiple antenna port transmission by cyclic redundancy check and masking of the downlink control information format.

11. A downlink control information transmission method is characterized in that a base station loads downlink control information for scheduling a physical uplink shared channel in a downlink control information format to be sent to a 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 a component carrier.

12. The method of claim 11,

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.

13. The method of claim 12,

the pad bit is 0 bit.

14. The method of claim 11, wherein the downlink control information format comprises the following information when the downlink control information format is used for scheduling a physical uplink shared channel for single antenna port transmission in one 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.

15. The method of claim 14, wherein when the downlink control information format is used for scheduling a physical uplink shared channel for single antenna port transmission in one component carrier, the downlink control information format further includes a frequency hopping flag bit.

16. The method of claim 14 or 15,

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.

17. The method of claim 11, wherein the downlink control information format comprises the following information when the downlink control information format is used for scheduling a physical uplink shared channel for multi-antenna port transmission in one 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.

18. The method of claim 17, wherein the downlink control information format further includes at least one of the following information when the downlink control information format is used for scheduling a physical uplink shared channel for multi-antenna port transmission in one component carrier:

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.

19. The method of claim 17 or 18,

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.

20. The method according to claim 11, wherein the downlink control information format further includes a single antenna/multiple antenna port transmission mode configuration flag bit for indicating whether the physical uplink shared channel scheduled by the downlink control information format is single antenna port transmission or multiple antenna port transmission; 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.

21. A base station, wherein the 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 a physical uplink shared channel for single antenna port transmission in one component carrier, and the downlink control information format for scheduling a physical uplink shared channel for single antenna port transmission in one component carrier is the same as the payload of the downlink control information format for scheduling a physical uplink shared channel for multi-antenna port transmission in one component carrier.

22. The base station of claim 21,

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.

23. The base station of claim 21,

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.

24. The base station of claim 21,

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.

25. The base station of claim 22 or 23 or 24,

the pad bit is 0 bit.

26. The base station of claim 21, wherein the base station carries the following information in a downlink control information format for scheduling a physical uplink shared channel for single antenna port transmission in one 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.

27. The base station of claim 26, wherein the base station further carries at least one of the following information in a downlink control information format of a physical uplink shared channel used for scheduling single antenna port transmission in one 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.

28. The base station of claim 21, wherein 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 one 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.

29. The base station of claim 28, wherein the base station further carries at least one of the following information in a downlink control information format of a physical uplink shared channel used for scheduling multi-antenna port transmission in one 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.

30. The base station according to any of claims 25 to 29, wherein said base station is configured to distinguish downlink control information formats of physical uplink shared channel for scheduling single antenna port transmission and multiple antenna port transmission by cyclic redundancy check and masking of downlink control information formats.

31. A base station, wherein 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 the downlink control information to a terminal, where the downlink control information format is used to schedule the physical uplink shared channel for single-antenna port transmission and multiple-antenna port transmission in one component carrier.

32. The base station of claim 31,

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.

33. The base station of claim 32,

the pad bit is 0 bit.

34. The base station of claim 31, wherein the base station is configured to, when the downlink control information format is used for scheduling a physical uplink shared channel for single antenna port transmission in one 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.

35. The base station of claim 34, wherein the base station is configured to further carry a frequency hopping flag in the downlink control information format when the downlink control information format is used for scheduling a physical uplink shared channel for single antenna port transmission in one component carrier.

36. The method of claim 34 or 35,

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.

37. The base station of claim 31, wherein the base station is configured to, when the downlink control information format is used for scheduling a physical uplink shared channel for multi-antenna port transmission 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.

38. The base station of claim 37, wherein the base station is configured to, when the downlink control information format is used for scheduling a physical uplink shared channel for multi-antenna port transmission 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.

39. The method of claim 37 or 38,

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.

40. The base station of claim 31, wherein 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.

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