# Patent

## Title
Method, base station, and user terminal for implementing uplink resource indication

## Abstract

A method, a base station (BS), and a user terminal for implementing uplink resource indication are provided. The method includes: carrying an uplink resource index in a ul grant, in which the uplink resource index is corresponding to at least one uplink resource in terms of indication; and sending the ul grant. The BS includes an index carrying module and an instruction sending module. The user terminal includes an instruction receiving module, an instruction resolving module, and an execution module.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. patent application Ser. No. 12/504,239, filed on Jul. 16, 2009, U.S. Pat. No. 8,358,603, which is a continuation of International Application No. PCT/CN2008/071926, filed on Aug. 7, 2008. The International Application claims priority to Chinese Patent Application No. 200710140544.8, filed on Aug. 9, 2007. All of the afore-mentioned patent applications are hereby incorporated by reference in their entireties.


FIELD OF THE DISCLOSURE
The present disclosure relates to the field of communications, and more particularly to a method, a base station (BS), and a user terminal for implementing uplink resource indication.
BACKGROUND OF THE DISCLOSURE
Time Division Duplex (TDD) is a radio transmission mode on radio channels. In the TDD mode, the transmission and reception are conducted in a time division manner, that is, the radio transmission based on the TDD mode realizes the time division multiplexing of uplink and downlink channels. The TDD mode is implemented by repeating Time Division Multiple Access (TDMA) frame structures periodically in time domains. For example, in Long Term Evolution (LTE), the 3GPP LTE has two TDD frame structures. The first frame structure is as shown in FIG. 1, in which a radio frame is composed by 20 slots, a period of a frame is 10 ms, and every two slots form a subframe (SF). The second frame structure is as shown in FIG. 2, in which a period of a frame is also 10 ms, a frame is divided into two half-frames, each half-frame is composed by seven SFs, a guard interval is inserted between every two SFs, and a guard period (GP) is formed by a downlink pilot time slot (DwPTS), a GP, and an uplink pilot time slot (UpPTS).
In the frame structure in the TDD mode, one frame includes several SFs or slots. The SFs may be classified into uplink SFs and downlink SFs, and a TDD system may use a transfer point to change the SF types flexibly. For example, the current 3GPP LTE standard specifies various SF ratios in the two frame structures. FIG. 3 is a schematic view of various uplink and downlink SF ratios in the first frame structure, in which the ratios in one frame are illustrated. FIG. 4 is a schematic view of various uplink and downlink SF ratios in the second frame structure, in which the ratios in one and a half frames are illustrated. A table of uplink and downlink SF ratios (as shown in Table 1) can be concluded from FIGS. 3 and 4. Table 1 lists the situation of one transfer point, that is, the situation that the uplink and downlink SFs have only one type transfer.








TABLE 1





Frame Structure
Uplink and Downlink SF Ratios (Downlink:Uplink)







First Frame
4:1, 3:2, 9:1, 6:4, 7:3, 8:2, 10:0, 2:2, 4:2, 2:3, 1:4


Structure


Second Frame
6:1, 5:2, 4:3, 3:4, 2:5, 1:6


Structure









According to different service requirements, the TDD system needs to indicate the uplink resources to which some uplink instructions are directed in the uplink instructions. For example, in downlink transmission of a 3GPP Evolved Universal Terrestrial Radio Access (E-UTRA) system, an Orthogonal Frequency Division Multiplexing (OFDM) technology is employed to realize multiple access. The OFDM is a multi-carrier communication technology. In a multi-carrier communication system, different time domain and frequency domain resources are granted to different users to realize multiplexing of time-frequency resources by multiple users. Here, the time-frequency resources may be granted by carrying resource grant indications of corresponding uplink SFs (ul grant) in downlink control signaling of a user. A ul grant may contain different contents. Table 2 lists the content of a ul grant.







TABLE 2







5 MHz


UL










Occupied



Domain
Bits
Content












Resource Grant
9
Continuous physical




resource blocks




granted to a user


Transmission Format
7
Transmission format


Indication/Transmission

indication, modulation


Block Size +

and information bits


Modulation Code

number and code formats


Format


Hybrid Automatic
2
Synchronous HARQ:


Retransmission

2-3 bits of serial


Request (HARQ)

number and implicit




confirmation of previous




transmission blocks


Power Control
2
Relative instructions


Pilot Instruction
1
Whether the pilot




appears in the last




long block (from other




user terminals) or whether




the last long block is




configured to transmit data


Channel Quality
1
The quality indication


Indication

report about the channel




scheduling should be




included in the data


ACK/NACK
1
Indicating that the user


Indication

terminal should reserve




resources for ACK/NACK




on the physical uplink




synchronous channel


Multi-antenna
2
Determined by multi-


Technology

user MIMO and uplink




multi-antenna technology,




2 bits


User Terminal Identity +
20
16-24-bit CRC


Cyclic Redundancy


Check (CRC)









Generally, a base station (BS) adopts downlink SFs to send the ul grant as shown in Table 2. After receiving the ul grant, each user determines whether the user identity in the ul grant is consistent with the identity of each user itself; and if they are consistent, the user grants the resources according to the ul grant. Thus, the resources can be granted to all users. For a user, when the downlink SFs are more than the uplink SFs, each of the downlink SFs is mapped to one uplink SF, that is, the downlink SF may be configured to send a ul grant for one uplink SF. However, the frame structure in the TDD system may be asymmetrical in terms of the uplink and downlink ratio, as shown in Table 1, that is, one downlink SF may be corresponding to multiple uplink SFs, so that the corresponding uplink SF cannot be determined according to one ul grant. In this case, a downlink SF needs to be configured to send multiple ul grants, so that one downlink SF is corresponding to multiple uplink SFs, and the ul grants will be sent separately. In other words, for the same user, if it is determined that n uplink SFs are required after scheduling, n corresponding ul grants exist, which will be transmitted repeatedly. Thus, the information such as the user identity is also repeatedly transmitted for n times, resulting in the waste of transmission resources such as signaling and channels.
It is known from the above analysis that the existing method for implementing uplink resource indication in the TDD system cannot indicate the uplink resources corresponding to the ul grants precisely, which may cause the waste of the resources and lead to a low utilization of the resources.
SUMMARY
Accordingly, the present invention provides a method, a base station (BS), and a user terminal for implementing uplink resource indication.
The technical solutions according to embodiments of the present invention are as follows.
A method for implementing uplink resource indication includes the following steps.
An uplink resource index is carried in a ul grant, in which the uplink resource index is corresponding to at least one uplink resource in terms of indication.
The ul grant is sent.
A BS for implementing uplink resource indication includes an index carrying module and an instruction sending module.
The index carrying module is configured to carry an uplink resource index in a ul grant, in which the uplink resource index corresponds to at least one uplink resource in terms of indication.
The instruction sending module is configured to send the ul grant.
A user terminal for implementing uplink resource indication includes an instruction receiving module, an instructing resolving module, and an execution module.
The instruction receiving module is configured to receive a ul grant from a BS, in which the ul grant carries an uplink resource index, and the uplink resource index is corresponding to at least one uplink resource in terms of indication.
The instruction resolving module is configured to resolve the uplink resource index from the ul grant received by the instruction receiving module.
The execution module is configured to obtain the at least one uplink resource corresponding to the uplink resource index resolved by the instruction resolving module according to a corresponding relation between the uplink resource index and the at least one uplink resource obtained in advance, and perform the resource grant on the obtained at least one uplink resource.
It is known from the above technical solutions that the method, BS, and user terminal for implementing uplink resource indication according to the embodiments of the present invention realize accurate indication of the at least one uplink resource through the uplink resource index, prevent repeated transmission of the same information in multiple uplink resources, effectively reduce the signaling overhead, and increase the resource utilization.



BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become better understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein:
FIG. 1 is a schematic view of a first frame structure in the prior art;
FIG. 2 is a schematic view of a second frame structure in the prior art;
FIG. 3 is a schematic view of various uplink and downlink RF ratios in the first frame structure in the prior art;
FIG. 4 is a schematic view of various uplink and downlink RF ratios in the second frame structure in the prior art;
FIG. 5 is a schematic flow chart of a method for implementing uplink resource indication according to a first embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for implementing uplink resource indication according to a second embodiment of the present invention;
FIG. 7 is a schematic structural view of a BS for implementing uplink resource indication according to a third embodiment of the present invention;
FIG. 8 is a schematic structural view of a user terminal according to a third embodiment of the present invention;
FIG. 9 is a schematic view of a frame structure according to an embodiment of the present invention;
FIG. 10 is a schematic view of various uplink and downlink RF ratios in a TDD frame structure according to an embodiment of the present invention;
FIG. 11 is a schematic flow chart of a method for implementing uplink resource indication according to a fifth embodiment of the present invention; and
FIG. 12 is a schematic flow chart of a method for implementing uplink resource indication according to a sixth embodiment of the present invention.



DETAILED DESCRIPTION OF THE EMBODIMENTS
In order to make the objectives, technical solutions, and beneficial effects of the present invention comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
A method according to an embodiment of the present invention:
An uplink resource index is carried in a ul grant, in which the uplink resource index corresponds to at least one uplink resource in terms of indication. Then, the ul grant is sent.
In the embodiment of the present invention, the uplink resource may be a time domain resource such as an uplink slot or an uplink SF, or other resource blocks such as a frequency domain resource block. The uplink SF is taken as an example below to illustrate the present invention.
FIG. 5 is a schematic flow chart of a method for implementing uplink resource indication according to a first embodiment of the present invention.
In Step 501, a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established.
The method for establishing the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication includes the following steps. The at least one uplink resource is combined into one group, and the uplink resources in each group are not completely the same. Each group is corresponding to an uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication.
In this embodiment, uplink resource indexes of different bits are applied to different frame structures, so that different corresponding relations between the uplink resource index and at least one uplink SF can be established. The establishing the corresponding relation between the uplink resource index and the at least one uplink SF in terms of indication in different circumstances is described in detail below. Persons skilled in the art should understand that only some specific examples of the technical solutions according to the embodiments of the present invention are illustrated below, and the present invention is not limited thereto.
In a first case, for the frame structure shown in FIG. 2, the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has four bits. Table 3 lists a combination in the first case. In this combination, one or two uplink SFs are combined into one group.










TABLE 3






DL: SF0,
DL: SF0, SF6
DL: SF0, SF5~SF6


Uplink Resource
UL: SF1~SF6
UL: SF1~SF5
UL: SF1~SF4


Index
(1:6)
(2:5)
(3:4)







0000
SF1
SF1
SF1


0001
SF2
SF2
SF2


0010
SF3
SF3
SF3


0011
SF4
SF4
SF4


0100
SF5
SF5
SF1 and SF2


0101
SF6
SF1 and SF2
SF1 and SF3


0110
SF1 and SF2
SF1 and SF3
SF1 and SF4


0111
SF1 and SF3
SF1 and SF4
SF2 and SF3


1000
SF1 and SF4
SF1 and SF5
SF2 and SF4


1001
SF2 and SF4
SF2 and SF3
SF3 and SF4


1010
SF2 and SF5
SF2 and SF4
Reserved


1011
SF3 and SF4
SF2 and SF5
Reserved


1100
SF3 and SF5
SF3 and SF4
Reserved


1101
SF3 and SF6
SF3 and SF5
Reserved


1110
SF4 and SF6
SF4 and SF5
Reserved


1111
SF5 and SF6
Reserved
Reserved









In a second case, for the frame structure shown in FIG. 2, the ul grant supports the indication of continuous uplink SFs, and the uplink resource index has three bits. Table 4 lists a combination in the second case. In this combination, one or two uplink SFs are combined into one group.










TABLE 4






DL: SF0,
DL: SF0, SF6
DL: SF0, SF5~SF6


Uplink Resource
UL: SF1~SF6
UL: SF1~SF5
UL: SF1~SF4


Index
(1:6)
(2:5)
(3:4)







000
SF1
SF1
SF1


001
SF2
SF2
SF2


010
SF3
SF3
SF3


011
SF4
SF4
SF4


100
SF5
SF5
SF1 and SF2


101
SF6
SF1 and SF2
SF2 and SF3


110
SF3 and SF4
SF3 and SF4
SF3 and SF4


111
SF5 and SF6
SF4 and SF5
Reserved









In a third case, for the frame structure shown in FIG. 1, the uplink resource index has four bits. For the simplicity of illustration, only the uplink SFs are considered. In addition, for the convenience of illustration, when there is only one uplink SF, the uplink SF is represented as ULSF1; and when there are two uplink SFs, the two uplink SFs are represented as ULSF1 and ULSF2 respectively. The representation of other uplink SFs is similar. Table 5 lists a combination in the third case.












TABLE 5





Uplink







Resource
Four
Three
Two
One
Zero


Index
ULSFs
ULSFs
ULSFs
ULSF
ULSF







0000
ULSF1
ULSF1
ULSF1
Reserved
Reserved


0001
ULSF2
ULSF2
ULSF2
Reserved
Reserved


0010
ULSF3
ULSF3
ULSF1
Reserved
Reserved





and





ULSF2


0011
ULSF4
ULSF1
Reserved
Reserved
Reserved




and




ULSF2


0100
ULSF1 and
ULSF1
Reserved
Reserved
Reserved



ULSF2
and




ULSF3


0101
ULSF1 and
ULSF2
Reserved
Reserved
Reserved



ULSF3
and




ULSF3


0110
ULSF1 and
Reserved
Reserved
Reserved
Reserved



ULSF4


0111
ULSF2 and
Reserved
Reserved
Reserved
Reserved



ULSF3


1000
ULSF3 and
Reserved
Reserved
Reserved
Reserved



ULSF4


1001
Reserved
Reserved
Reserved
Reserved
Reserved


1010
Reserved
Reserved
Reserved
Reserved
Reserved


1011
Reserved
Reserved
Reserved
Reserved
Reserved


1100
Reserved
Reserved
Reserved
Reserved
Reserved


1101
Reserved
Reserved
Reserved
Reserved
Reserved


1110
Reserved
Reserved
Reserved
Reserved
Reserved


1111
Reserved
Reserved
Reserved
Reserved
Reserved









In a fourth case, for the frame structure shown in FIG. 1, the ul grant supports the indication of continuous uplink SFs, and the uplink resource index has three bits. Table 6 lists a combination in the fourth case.












TABLE 6





Uplink







Resource
Four
Three
Two
One
Zero


Index
ULSFs
ULSFs
ULSFs
ULSF
ULSF







000
ULSF1
ULSF1
ULSF1
Reserved
Reserved


001
ULSF2
ULSF2
ULSF2
Reserved
Reserved


010
ULSF3
ULSF3
ULSF1
Reserved
Reserved





and





ULSF2


011
ULSF4
ULSF1
Reserved
Reserved
Reserved




and




ULSF2


100
ULSF1 and
ULSF2
Reserved
Reserved
Reserved



ULSF2
and




ULSF3


101
ULSF2 and
Reserved
Reserved
Reserved
Reserved



ULSF3


110
ULSF3 and
Reserved
Reserved
Reserved
Reserved



ULSF4


111
Reserved
Reserved
Reserved
Reserved
Reserved









In Step 502, the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource.
In this embodiment, the ul grant is that of the same user listed in Table 2, and the specific content of the ul grant is shown in Table 7.







TABLE 7







5 MHz


UL










Occupied



Domain
Bits
Content





Resource Grant
9
Continuous physical




resource blocks granted




to a user


Transmission Format
7
Transmission format


Indication/Transmission

indication, modulation


Block Size +

and information bits


Modulation Code

number and code formats


Format




HARQ
2
Synchronous HARQ:




2-3 bits of serial number




and implicit confirmation




of previous transmission




blocks


Power Control
2
Relative instructions


Pilot Instruction
1
Whether the pilot appears




in the last long block




(from other user terminals)




or whether the last




long block is configured




to transmit data


Channel Quality
1
The quality indication


Indication

report about the channel




scheduling should be




included in the data


ACK/NACK
1
Indicating that the user


Indication

terminal should reserve




resources for ACK/NACK




on the physical uplink




synchronous channel


Multi-antenna
2
Determined by multi-


Technology

user MIMO and uplink




multi-antenna technology,




2 bits


User Terminal
20 
16-24-bit CRC


Identity + CRC


Uplink Resource
3 or 4
Uplink resource


Index

indication









In Step 503, the ul grant carrying the uplink resource index is sent.
In this embodiment, the ul grant carrying the uplink resource index is sent in a downlink SF.
In this embodiment, the optimal 3-bit or 4-bit uplink resource index is configured to indicate the uplink SF, and for the convenience of illustration, only the combination of one or two uplink SFs is described. Persons skilled in the art should understand that the embodiment of the present invention is not limited to the corresponding relations between the uplink resource index and the uplink SF in terms of indication listed in Table 3 to Table 7.
After receiving the ul grant carrying the uplink resource index from a BS, a user terminal resolves the uplink resource index from the ul grant, and performs the resource grant on the at least one uplink resource corresponding to the uplink resource index according to the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication obtained in advance. Here, after the BS establishes the corresponding relation in terms of indication, the user terminal may obtain the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication through static configuration or by dynamically acquiring from the BS.
In this embodiment, by carrying the uplink resource index in the ul grant, one ul grant of a user may indicate the resource grant of multiple uplink SFs. Thus, when an asymmetrical resource grant is performed in the TDD mode, especially when the uplink SFs are more than the downlink SFs, the corresponding relation between the ul grant and the uplink SFs can be established. This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization.
FIG. 6 is a schematic flow chart of a method for implementing uplink resource indication according to a second embodiment of the present invention.
In Step 601, all uplink resources are grouped in at least one uplink resource set in advance.
In this embodiment, all of the uplink resources are grouped into at least one uplink resource set according to the corresponding relation between the downlink SF for sending the ul grant and the uplink SFs in terms of indication.
In this embodiment, the frame structure in FIG. 2 is adopted, and the corresponding relation between the downlink SFs and the uplink SF set in terms of indication listed in Table 8 is set in advance. For example, when the uplink and downlink SF ratio is 4:3, if SF6 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF2; and if SF0 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF3 and SF4.














TABLE 8





Uplink and









Downlink SF


Ratio


(UL:DL)
SF1
SF2
SF3
SF4
SF5
SF6
SF0







4:3
—
—
—
—
SF1
SF2
SF3 and









SF4


5:2
—
—
—
—
—
SF1 and
SF3, SF4,








SF2
and SF5


6:1
—
—
—
—
—
—
SF1, SF2,









SF3, SF4,









SF5, and









SF6









In Step 602, a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established.
The corresponding relation between the uplink resource index and the at least one uplink resource may be established as follows. The at least one uplink resource in each uplink resource set is combined into one group, and the uplink resources in each group are not completely the same. Each group in the same uplink resource set is corresponding to one uplink resource index, so as to establish the corresponding relation between the uplink resource index and at least one uplink resource in the same uplink resource group in terms of indication.
In this embodiment, for the frame structure shown in FIG. 2, according to the corresponding relation between the downlink SFs and the uplink SF set listed in Table 8, the uplink resource indexes in different bits are configured to establish the corresponding relation between different uplink resource indexes and at least one uplink SF in terms of indication. Two circumstances are described as follows.
In a first case, for the frame structure shown in FIG. 2, the uplink resource index has four bits. Table 9 lists a combination in the first case.










TABLE 9









DL: SF0, SF6
DL: SF0, SF5~SF6


Uplink
DL: SF0,
UL: SF1~SF5
UL: SF1~SF4


Resource
UL: SF1~SF6
(2:5)
(3:4)













Index
(1:6)
SF6
SF0
SF5
SF6
SF0















0000
SF1
SF1
SF5
Reserved
SF3


0001
SF2
SF2
SF3
Reserved
SF4











0010
SF3
SF1 and
SF4 and
Reserved




SF2
SF5


0011
SF4
Reserved
SF4 and
Reserved





SF3


0100
SF5
Reserved
SF5 and
Reserved





SF3










0101
SF6
Reserved
Reserved


0110
SF1 and SF2
Reserved
Reserved


0111
SF1 and SF3
Reserved
Reserved


1000
SF1 and SF4
Reserved
Reserved


1001
SF2 and SF4
Reserved
Reserved


1010
SF2 and SF5
Reserved
Reserved


1011
SF3 and SF4
Reserved
Reserved


1100
SF3 and SF5
Reserved
Reserved


1101
SF3 and SF6
Reserved
Reserved


1110
SF4 and SF6
Reserved
Reserved


1111
SF5 and SF6
Reserved
Reserved









In a second case, for the frame structure shown in FIG. 2, the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has three bits. Table 10 lists a combination in the second case.










TABLE 10









DL: SF0, SF6
DL: SF0, SF5~SF6


Uplink
DL: SF0,
UL: SF1~SF5
UL: SF1~SF4


Resource
UL: SF1~SF6
(2:5)
(3:4)













Index
(1:6)
SF6
SF0
SF5
SF6
SF0















000
SF1
SF1
SF5
Reserved
SF3


001
SF2
SF2
SF3
Reserved
SF4











010
SF3
SF1 and SF2
SF4 and
Reserved





SF5


011
SF4
Reserved
SF4 and
Reserved





SF3


100
SF5
Reserved
SF5 and
Reserved





SF3










101
SF6
Reserved
Reserved


110
SF1 and SF2
Reserved
Reserved


111
SF1 and SF3
Reserved
Reserved









Certainly, in this embodiment, the frame structure shown in FIG. 1 may also be adopted. Thereby, the corresponding relation between the downlink SFs and the uplink resource set listed in Table 11 may be set in advance in Step 601.









TABLE 11





Uplink and Downlink




SF Ratio (DL:UL)
DLSF0
DLSF1







1:4
ULSF0, ULSF1, ULSF2,
—



and ULSF3


2:3
ULSF0 and ULSF1
ULSF2


2:4
ULSF0 and ULSF1
ULSF2 and ULSF3









For the frame structure shown in FIG. 1, according to the corresponding relation between the downlink SFs and the uplink SF set listed in Table 11, the uplink resource indexes in different bits are configured to establish the corresponding relation between the uplink resource indexes and at least one uplink SF in terms of indication. Two circumstances are described as follows.
In a first case, for the frame structure shown in FIG. 1, the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has four bits. Table 12 lists a combination in the first case.










TABLE 12









DL: DLSF0~1
DL: DLSF0~1


Uplink
DL: DLSF0,
UL: ULSF0~2
UL: ULSF0~3


Resource
UL: ULSF0~3
(2:3)
(2:4)












Index
(1:4)
DLSF0
DLSF1
DLSF0
DLSF1





0000
ULSF1
ULSF0
Reserved
ULSF0
ULSF2


0001
ULSF2
ULSF1
Reserved
ULSF1
ULSF3










0010
ULSF3
Reserved
Reserved


0011
ULSF0
Reserved
Reserved


0100
ULSF1 and ULSF2
Reserved
Reserved


0101
ULSF1 and ULSF3
Reserved
Reserved


0110
ULSF1 and ULSF0
Reserved
Reserved


0111
ULSF2 and ULSF3
Reserved
Reserved


1000
ULSF3 and ULSF0
Reserved
Reserved


1001
Reserved
Reserved
Reserved


1010
Reserved
Reserved
Reserved


1011
Reserved
Reserved
Reserved


1100
Reserved
Reserved
Reserved


1101
Reserved
Reserved
Reserved


1110
Reserved
Reserved
Reserved


1111
Reserved
Reserved
Reserved









In a second case, for the frame structure shown in FIG. 1, the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has three bits. Table 13 lists a combination in the second case.










TABLE 13









DL: DLSF0~1
DL: DLSF0~1


Uplink
DL: DLSF0,
UL: ULSF0~2
UL: ULSF0~3


Resource
UL: ULSF0~3
(2:3)
(2:4)












Index
(1:4)
DLSF0
DLSF1
DLSF0
DLSF1





000
ULSF1
ULSF0
Reserved
ULSF0
ULSF2


001
ULSF2
ULSF1
Reserved
ULSF1
ULSF3










010
ULSF3
Reserved
Reserved


011
ULSF0
Reserved
Reserved


100
ULSF1 and ULSF2
Reserved
Reserved


101
ULSF1 and ULSF3
Reserved
Reserved


110
ULSF1 and ULSF0
Reserved
Reserved


111
ULSF2 and ULSF3
Reserved
Reserved









In Step 603, the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource.
In this embodiment, the uplink resource index for indicating the uplink resource is carried in another ul grant. The specific content is shown in Table 14.















TABLE 14







NRA-MAP-bits
16-bits
4-bits
4-bits
1-bit
5-bits
3⁄4 bits























SIMO-OL TxDiv
Resource
User
First
Second
Reserved
Signaling
Uplink



grant
terminal
code
code

related to
resource




identity
word in
word in

HARQ
index




(CRC)
multiple
multiple


Indicating





code
code


which





words
words


frame is









scheduled









in the









TDD


SIMO-CL TxDiv
Resource
User
First
Second
Precoding
Signaling
Uplink



grant
terminal
code
code
matrix
related to
resource




identity
word in
word in
indication
HARQ
index




(CRC)
multiple
multiple
and





code
code
selection





words
words


SU-MIMO-1CW
Resource
User
First
Second
Precoding
Signaling
Indicating



grant
terminal
code
code
matrix
related to
which




identity
word in
word in
indication
HARQ
frame is




(CRC)
multiple
multiple
and

scheduled





code
code
selection

in the





words
words


TDD


SU-MIMO-2CW
Resource
User
First
Second
Precoding
Signaling
Uplink



grant
terminal
code
code
matrix
related to
resource




identity
word in
word in
indication
HARQ
index




(CRC)
multiple
multiple
and





code
code
selection





words
words


MU-MIMO
Resource
User
First
Second
Precoding
Signaling
Indicating



grant
terminal
code
code
matrix
related to
which




identity
word in
word in
indication
HARQ
frame is




(CRC)
multiple
multiple
and

scheduled





code
code
selection

in the





words
words


TDD


BEAM-
Resource
User
First
Second
Precoding
Signaling
Uplink


FORMING
grant
terminal
code
code
matrix
related to
resource




identity
word in
word in
indication
HARQ
index




(CRC)
multiple
multiple
and





code
code
selection





words
words









In Step 604, the ul grant carrying the uplink resource index is sent.
In this embodiment, all uplink resources are grouped into at least one uplink resource set, the uplink SF set corresponding to the ul grant is preliminarily determined according to the downlink SF for sending the ul grant, and the specific uplink resources are indicated according to the uplink resource index added in the ul grant.
In this embodiment, according to the preset corresponding relation between the downlink SFs and the uplink SF set, all of the uplink SFs are grouped into at least one uplink SF set. For uplink slots, according to the preset corresponding relation between the downlink slot and the uplink slot set, all of the uplink SFs are grouped into at least one uplink slot set. In this case, the user terminal needs to obtain the mode for grouping the uplink resource set statically or dynamically, and the indicated uplink resource is determined according to the obtained uplink resource set and the uplink resource index.
In the current 3GPP LTE standard, the resource grant is performed in a downlink acknowledgement (DLACK) mode, and the resources are corresponding to the ul grants one by one. When the resource grant of multiple uplink resources is represented by one ul grant, data packets of the uplink resources are corresponding to one acknowledgement channel, which may carry information of only two bits. Therefore, in this embodiment, one ul grant can indicate the resource grant of at most two uplink resources.
This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization.
FIG. 7 is a schematic structural view of a BS for implementing uplink resource indication according to a third embodiment of the present invention. The BS includes an index carrying module 701 and an instruction sending module 702.
The index carrying module 701 is configured to carry an uplink resource index in a ul grant, in which the uplink resource index is corresponding to at least one uplink resource in terms of indication.
The instruction sending module 702 is configured to send the ul grant generated by the index carrying module 701.
The BS further includes a mapping module 703.
The mapping module 703 is configured to establish a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication.
This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization.
FIG. 8 is a schematic structural view of a user terminal according to a fourth embodiment of the present invention. The user terminal includes an instruction receiving module 801, an instruction resolving module 802, and an execution module 803.
The instruction receiving module 801 is configured to receive a ul grant from a BS, in which the ul grant carries an uplink resource index, and the uplink resource index is corresponding to at least one uplink resource in terms of indication.
The instruction resolving module 802 is configured to resolve the uplink resource index from the ul grant received by the instruction receiving module 801.
The execution module 803 is configured to obtain the at least one uplink resource corresponding to the uplink resource index resolved by the instruction resolving module 802 according to a corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication obtained in advance, and perform the resource grant on the obtained at least one uplink resource.
This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization.
As shown in FIG. 9, a radio frame is composed by 20 slots, a period of a frame is 10 ms, a frame is divided into two half-frames, each half-frame is composed by five SFs, the first half-frame includes SF0-SF4, and the second half-frame includes SF5-SF9. SF1 and SF6 are respectively formed by a special downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS), and serve as transfer points of uplink and downlink SFs. SF6 may also not be configured as a transfer point. Thereby, the entire frame is used as a downlink frame.
In the frame structure in the TDD mode, one frame includes several SFs or slots. The SFs may be classified into uplink SFs and downlink SFs, and a TDD system may use a transfer point to transfer the SF types flexibly. For example, in the current 3GPP LTE standard, different SF grant ratios are specified. FIG. 10 is a schematic view of various uplink and downlink SF ratios in the frame structure shown in FIG. 9. FIG. 10 lists seven configuration results of a frame. The frame includes ten SFs, namely SF0-SF9. In different configurations, the uplink and downlink SF ratios in a frame are different. A table of uplink and downlink SF ratios (Table 15) is concluded from FIG. 10. Table 15 lists the circumstances of one and two transfer points.










TABLE 15










Uplink and




Downlink Ratio



SF Number
(Downlink:


















Configuration
0
1
2
3
4
5
6
7
8
9
Uplink)





0
Downlink
Transfer
Uplink
Uplink
Uplink
Downlink
Transfer
Uplink
Uplink
Uplink
1:3




point




point


1
Downlink
Transfer
Uplink
Uplink
Downlink
Downlink
Transfer
Uplink
Uplink
Downlink
2:2




point




point


2
Downlink
Transfer
Uplink
Downlink
Downlink
Downlink
Transfer
Uplink
Downlink
Downlink
3:1




point




point


3
Downlink
Transfer
Uplink
Uplink
Uplink
Downlink
Downlink
Downlink
Downlink
Downlink
6:3




point


4
Downlink
Transfer
Uplink
Uplink
Downlink
Downlink
Downlink
Downlink
Downlink
Downlink
7:2




point


5
Downlink
Transfer
Uplink
Downlink
Downlink
Downlink
Downlink
Downlink
Downlink
Downlink
8:1




point


6
Downlink
Transfer
Uplink
Uplink
Uplink
Downlink
Transfer
Uplink
Uplink
Downlink
3:5




point




point









FIG. 11 is a schematic flow chart of a method for implementing uplink resource indication according to a fifth embodiment of the present invention.
In Step 1101, a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established.
The method for establishing the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication is as follows. The at least one uplink resource is combined into one group, and the uplink resources in each group are not completely the same. Each group is corresponding to an uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication.
In this embodiment, uplink resource indexes of different bits are used for different frame structures, so different corresponding relations between the uplink resource index and at least one uplink SF can be established. The establishing the corresponding relation between the uplink resource index and the at least one uplink SF in terms of indication in different situations are described in detail below. Persons skilled in the art should understand that only some specific examples of the technical solutions according to the embodiment of the present invention are described below, and the present invention is not limited thereto.
For the frame structure shown in FIG. 10, the ul grant supports the indication of continuous uplink SFs, and the uplink resource index has three bits. Table 16 lists a combination in a first case. In this combination, one or two uplink SFs are combined into one group.








TABLE 16






Uplink Resources


Uplink Resource Index
(3 Uplink SFs: SF2~SF4)







000
SF2


001
SF3


010
SF4


011
SF2 and SF3


100
SF2 and SF4


101
SF3 and SF4


110
Reserved


111
Reserved









In Step 1102, the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource.
In this embodiment, the ul grant is that of the same user listed in Table 2, and the specific content of the ul grant is as listed in Table 17.







TABLE 17







5 MHz


UL










Occupied



Domain
Bits
Content





Resource Grant
9
Continuous physical




resource blocks




granted to a user


Transmission Format
7
Transmission format


Indication/Transmission

indication, modulation


Block Size +

and information bits


Modulation Code

number and code formats


Format


HARQ
2
Synchronous HARQ:




2-3 bits of serial




number and implicit




confirmation of previous




transmission blocks


Power Control
2
Relative instructions


Pilot Instruction
1
Whether the pilot appears




in the last long block




(from other user terminals) or




whether the last long block




is configured to transmit data


Channel Quality
1
The quality report about


Indication

the channel scheduling




should be included in




the data


ACK/NACK
1
Indicating that the


Indication

user terminal should reserve




resources for ACK/NACK on




the physical uplink




synchronous channel


Multi-antenna
2
Determined by multi-


Technology

user MIMO and uplink




multi-antenna technology,




2 bits


User Terminal
20 
16-24-bit CRC


Identity + CRC


Uplink Resource Index
3 or 4
Uplink resource indication









In Step 1103, the ul grant carrying the uplink resource index is sent.
In this embodiment, the ul grant carrying the uplink resource index is sent in a downlink SF.
In this embodiment, the optimal 3-bit uplink resource index is configured to indicate the uplink SF, and for the convenience of illustration, only the combination of one or two uplink SFs is described. Persons skilled in the art should understand that the embodiment of the present invention is not limited to the corresponding relations between the uplink SF index and the uplink SF in terms of indication listed in Table 3 and Table 4.
After receiving the ul grant carrying the uplink resource index from a BS, a user terminal resolves the uplink resource index from the ul grant, and performs the resource grant on the at least one uplink resource corresponding to the uplink resource index according to the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication obtained in advance. Here, after the BS establishes the corresponding relation in terms of indication, the user terminal may obtain the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication through static configuration or by dynamically acquiring from the BS.
In this embodiment, by carrying the uplink resource index in the ul grant, one ul grant of a user may indicate the resource grant of multiple uplink SFs. Thus, when an asymmetrical resource grant is performed in the TDD mode, especially when the uplink SFs are more than the downlink SFs, the corresponding relation between the ul grant and the uplink SFs can be established. This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization.
FIG. 12 is a schematic flow chart of a method for implementing uplink resource indication according to a sixth embodiment of the present invention.
In Step 1201, all uplink resources are grouped in at least one uplink resource set in advance.
In this embodiment, all of the uplink resources are grouped into at least one uplink resource set according to the corresponding relation between the downlink SF for sending the ul grant and the uplink SFs in terms of indication.
In this embodiment, the frame structure in FIG. 10 is adopted, and the corresponding relation between the downlink SFs and the uplink SF set in terms of indication listed in Table 18 is set in advance. For example, when the uplink and downlink SF ratio (UL:DL) is 3:1, if SF0 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF4 of the current period and SF2* of the next period; and if SF1 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF2* and SF3* of the next period.












TABLE 18





Uplink and Downlink







SF Ratio (UL:DL)
SF0
SF1
SF2
SF3
SF4







3:1
SF4 and
SF2* and
—
—
—



SF2*
SF3*









In Step 1202, a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established.
The corresponding relation between the uplink resource index and the at least one uplink resource may be established as follows. The at least one uplink resource in each uplink resource set is combined into one group, and the uplink resources in each group are not completely the same. Each group in the same uplink resource set is corresponding to one uplink resource index, so as to establish the corresponding relation between the uplink resource index and at least one uplink resource in the same uplink resource group in terms of indication.
In this embodiment, according to the corresponding relation between the downlink SF and the uplink SF set, the uplink resource indexes in different bits are configured to establish the corresponding relation between different uplink resource indexes and at least one uplink SF in terms of indication. For example, for the frame structure shown in FIG. 10, the uplink resource index has two bits; and according to the corresponding relation listed in Table 18, a combination listed in Table 19 is obtained.









TABLE 19







Uplink
DL: SF0, SF1



Resource
UL: SF2~SF4


Index
(DL:UL is 1:3)









(2 bit)
SF0
SF1





00
SF4
SF2*


01
SF2*
SF3*


10
SF4 and SF2*
SF2* and SF3*


11
Reserved
Reserved









In Step 1203, the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource.
In this embodiment, the uplink resource index for indicating the uplink resource is carried in another ul grant. The specific content is shown in Table 20.















TABLE 20







NRA-MAP-bits
16-bits
4-bits
4-bits
1-bit
5-bits
2 bits























SIMO-OL TxDiv
Resource
User
First
Second
Reserved
Signaling
Uplink



grant
terminal
code
code

related to
resource




identity
word in
word in

HARQ
index




(CRC)
multiple
multiple


Indicating





code
code


which





words
words


frame is









scheduled









in the









TDD


SIMO-CL TxDiv
Resource
User
First
Second
Precoding
Signaling
Uplink



grant
terminal
code
code
matrix
related to
resource




identity
word in
word in
indication
HARQ
index




(CRC)
multiple
multiple
and





code
code
selection





words
words


SU-MIMO-1CW
Resource
User
First
Second
Precoding
Signaling
Indicating



grant
terminal
code
code
matrix
related to
which




identity
word in
word in
indication
HARQ
frame is




(CRC)
multiple
multiple
and

scheduled





code
code
selection

in the





words
words


TDD


SU-MIMO-2CW
Resource
User
First
Second
Precoding
Signaling
Uplink



grant
terminal
code
code
matrix
related to
resource




identity
word in
word in
indication
HARQ
index




(CRC)
multiple
multiple
and





code
code
selection





words
words


MU-MIMO
Resource
User
First
Second
Precoding
Signaling
Indicating



grant
terminal
code
code
matrix
related to
which




identity
word in
word in
indication
HARQ
frame is




(CRC)
multiple
multiple
and

scheduled





code
code
selection

in the





words
words


TDD


BEAM-
Resource
User
First
Second
Precoding
Signaling
Uplink


FORMING
grant
terminal
code
code
matrix
related to
resource




identity
word in
word in
indication
HARQ
index




(CRC)
multiple
multiple
and





code
code
selection





words
words









In Step 1204, the ul grant carrying the uplink resource index is sent.
In this embodiment, all uplink resources are grouped into at least one uplink resource set, the uplink SF set corresponding to the ul grant is preliminarily determined according to the downlink SF for sending the ul grant, and the specific uplink resources are indicated according to the uplink resource index added in the ul grant.
In this embodiment, according to the preset corresponding relation between the downlink SF and the uplink SF set, all of the uplink SFs are grouped into at least one uplink SF set. For uplink slots, according to the preset corresponding relation between the downlink slot and the uplink slot set in terms of indication, all of the uplink SFs are grouped into at least one uplink slot set. In this case, the user terminal needs to obtain the mode for grouping the uplink resource set statically or dynamically, and the indicated uplink resource is determined according to the obtained uplink resource set and the uplink resource index.
In the current 3GPP LTE standard, the resource grant is performed in a DLACK mode, and the resources are corresponding to the ul grants one by one. When the resource grant of multiple uplink resources is represented by one ul grant, data packets of the multiple uplink resources are corresponding to one acknowledgement channel, which may carry information of only two bits. Therefore, in this embodiment, one ul grant can indicate the resource grant of at most two uplink resources. If two many packets are indicated, in the retransmission, the packets cannot be terminated at the same time, which makes the subsequent scheduling more complicated. Therefore, the comprehensive consideration of resource grant of two uplink resources is a reasonable processing mode.
This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization.
All or a part of the content of the technical solutions according to the embodiments may be implemented through software programming. The software program is stored in a readable storage media, for example, a hard disk, an optical disk, or a floppy disk in a computer.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.

## Claims

1. A method for implementing uplink resource (ul grant), comprising:
receiving, by a user terminal, an ul grant from a base station, the ul grant includes an uplink resource index, wherein a corresponding relationship exists between the uplink resource index and at least one uplink subframe, the corresponding relationship is determined by an uplink-downlink subframe ratio of a configuration, and the number of uplink subframes is more than the number of downlink subframes in the uplink-downlink subframe ratio of the configuration;
resolving, by the user terminal, the uplink resource index from the ul grant,
wherein the corresponding relation has been established for the uplink resource index prior to the uplink resource grant being sent by the base station, and the corresponding relationship is established by the base station performing the following:
combining the at least one uplink subframe into a group; and
correlating, the group with the uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink subframe; wherein each uplink resource index is correlated with a group of at least one uplink subframe, and the uplink subframes in each group are not completely the same;
performing, by the user terminal, the resource grant on the at least one uplink subframe according to the resolved uplink resource index.

2. The method according to claim 1, wherein the corresponding relationship is further established by the base station performing:
grouping, all of the uplink subframes into at least one uplink subframe set, wherein the at least one uplink subframe set comprises multiple uplink subframes,
wherein the combining includes combining the at least one uplink subframe in each uplink subframe set into a group,
wherein the correlating includes correlating, the group in the same uplink subframe set with the uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink subframe in the same uplink resource set, and
wherein each uplink resource index is correlated with a group of at least one uplink subframe set, and the uplink subframes in each group are not completely the same.

3. The method according to claim 1, wherein when the ul grant supports processing of continuous uplink subframe, the combining, the at least one uplink subframe into a group comprises: combining, the continuous uplink resources into a group.

4. The method according to claim 1, wherein the uplink resource index is included in a field added to the ul grant.

5. The method according to claim 1, wherein the uplink resource index comprises: one bit, two bits, three bits, or four bits.

6. The method according to claim 1, wherein the uplink resource index corresponds to the at least one uplink subframe comprises:
the uplink resource index corresponds to one or two uplink subframes.

7. A user terminal (UE) comprising:
an instruction receiving module, configured to receive an uplink resource grant (ul grant) from a base station, the ul grant includes an uplink resource index, wherein a corresponding relationship exists between the uplink resource index and at least one uplink subframe, and the corresponding relationship is determined by a uplink-downlink subframe ratio of a configuration, and the number of uplink subframes is more than the number of downlink subframes in the uplink-downlink subframe ratio of the configuration;
an instruction resolving module, configured to resolve the uplink resource index from the ul grant received by the instruction receiving module; and
an execution module, configured to perform resource grant on the at least one uplink subframe according to the resolved uplink resource index,
wherein the corresponding relation is established for the uplink resource index prior to the uplink resource grant being sent by the base station, and the corresponding relationship is established by the base station being configured to perform the following:
combining the at least one uplink subframe into a group; and
correlating the group with the uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink subframe, wherein each uplink resource index is correlated with a group of at least one uplink subframes, and the uplink subframes in each group are not completely the same.

8. The UE according to claim 7, wherein the uplink resource index is included in a field added to the ul grant.

9. The UE according to claim 7, wherein the uplink resource index comprises one bit, two bits, three bits, or four bits.

10. The UE according to claim 7, wherein the corresponding relationship is further established by the base station being configured to perform:
grouping, all of the uplink subframes into at least one uplink subframe set, wherein the at least one uplink subframe set comprises multiple uplink subframes,
wherein the combining includes combining the at least one uplink subframe in each uplink subframe set into a group,
wherein the correlating includes correlating the group in the same uplink subframe set with the uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink subframes in the same uplink resource set, and
wherein each uplink resource index is correlated with a group of at least one uplink subframes set, and the uplink subframes in each group are not completely the same.