CN112702789B

CN112702789B - Resource allocation method for physical uplink shared channel

Info

Publication number: CN112702789B
Application number: CN202011413247.8A
Authority: CN
Inventors: 余秋星; 张文忠
Original assignee: Hangzhou Honglingtong Information Technology Co ltd
Current assignee: Hangzhou Honglingtong Information Technology Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2022-11-18
Anticipated expiration: 2040-12-03
Also published as: CN112702789A

Abstract

The invention provides a resource allocation method of a physical uplink shared channel, which comprises the following steps: step 1, a base station pre-configures parameters and informs user equipment; step 2, the base station calculates each parameter of the resource block group according to the configuration parameters; and step 3, the base station determines scheduling information according to each parameter of the resource block group and sends the scheduling information to the user equipment. According to the technical scheme, the frequency domain resource allocation method based on the type0 introduces the configuration of frequency offset, and can solve the problem that all available RB resources cannot be flexibly and fully scheduled.

Description

Resource allocation method for physical uplink shared channel

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a resource allocation method of a physical uplink shared channel.

Background

In NR (New Radio), PUSCH (Physical Uplink Shared Channel) carries traffic and signaling. The scheduling Information of the PUSCH includes frequency domain resource allocation Information, and is indicated by a DCI (Downlink Control Information) of a PDCCH (Physical Downlink Control Channel) and notified to a UE (User Equipment).

According to the specification of 3GPP (Third Generation Partnership Project), there are two ways to allocate frequency domain resources of PUSCH: type0 (type 0) and type1 (type 1). For type0, the allocation condition of the uplink Resource Block Group RBG (Resource Block Group) in the BWP (Bandwidth Part) is indicated by using bitmap (bitmap). Wherein, the RBG is composed of a plurality of continuous RBs, the number of RBs forming 1 RBG is related to high-level configuration (two configurations), BWP starting position and BWP size. The type0 resource allocation is flexible, and continuous allocation and discontinuous frequency domain resource allocation are supported. For a BWP scene with 145-275 RBs, the size of the RBG in the two high-level configurations is 16 RBs, and partial RBs at both ends of the BWP bandwidth need to be reserved for PUCCH for feedback of downlink traffic, scheduling request, or feedback of channel state information, and the number of RBs generally occupied is small, for example, each of the two ends of the BWP bandwidth occupies 2 RBs. In this way, in 16 RBs of the first 1-2 RBGs and the last 1-2 RBGs of BWP, since a few part of RBs (e.g., 1 or 2 RBs) are occupied by PUCCH, the whole RBG cannot be scheduled out, and thus all available RB resources cannot be scheduled flexibly and sufficiently.

The existing chinese patent application No. 201010257101.9 discloses a method and system for determining physical uplink control channel resources, wherein a terminal determines, according to parameters configured by a base station, a frequency domain resource used when a physical uplink control channel format 3 is sent, that is, a position of the physical uplink control channel format 3 in a total physical uplink control channel region, according to a set positional relationship: for example, positional relationship 1: from the edge of the bandwidth to the center of the bandwidth, the total physical uplink control channel region sequentially comprises a physical uplink control channel format 3 region, a physical uplink control channel format 2/2a/2b region, a mixed resource block and a physical uplink control channel format 1/1a/1b region. The invention provides a feasible scheme for determining the resources of the physical uplink control channel format 3 and improves the system performance. However, a resource allocation method for the physical uplink shared channel is not proposed.

For another example, chinese patent application No. 201210022532.6 discloses a resource allocation method and system for a physical uplink control channel, the method includes: a base station issues parameters or newly added bits for determining the resource allocation of a physical uplink control channel aiming at user equipment to the user equipment; and the user equipment receives the parameters or the newly added bits and determines the resource allocation of the physical uplink control channel according to the parameters or the newly added bits. The physical uplink control channel can flexibly and simply realize the resource allocation of the physical uplink control channel. A method for allocating resources of the physical uplink shared channel is also not proposed.

Disclosure of Invention

Aiming at the defect blank in the prior art, the invention provides a resource allocation method of a physical uplink shared channel.

The technical scheme for solving the problems is as follows:

the resource allocation method comprises the following steps:

step 1, a base station configures parameters in advance and informs user equipment;

step 2, the base station calculates each parameter of the resource block group according to the configuration parameters;

and step 3, the base station determines scheduling information according to each parameter of the resource block group and sends the scheduling information to the user equipment.

Further, the step 1 of the base station pre-configuring the parameters and notifying the user equipment includes:

step 101, the base station pre-configures parameters including an initial position of the bandwidth BWP, a size of the resource block group RBG, and offset parameters, where the configured offset parameters include a first offset parameter and a second offset parameter that need to satisfy any one of the following rule requirements:

rule 1: the first offset parameter and the second offset parameter are optional configuration;

rule 2: if the offset parameter is not configured, setting the first offset parameter and the second offset parameter as 0;

rule 3: if only the first offset parameter is configured, configuring the second offset parameter with the same value as the first offset parameter;

rule 4: if the first offset parameter and the second offset parameter are configured differently, processing is carried out according to the actual configuration offset parameter;

and 102, the base station sends an air interface message to the user equipment according to the first offset parameter and the second offset parameter through the technical specification 38.331 of the 3 GPP.

Further, the step 2 of calculating, by the base station according to the configuration parameters, each parameter of the resource block group includes:

step 201, the base station calculates the start position of the processed bandwidth BWP according to a first calculation model according to the start position of the bandwidth BWP and a first offset parameter, where the first calculation model is as follows (1):

in the above equation (1), a is the starting position of the processed bandwidth BWP,

the initial position of BWP is RBShift1 as a first shift parameter;

step 202, the base station calculates the size of the processed bandwidth BWP according to a second calculation model according to the size of the bandwidth BWP, the first offset parameter and the second offset parameter, where the second calculation model is as follows (2):

in the above equation (2), b is the size of the processed bandwidth BWP,

the bandwidth BWP is the size of the bandwidth RBShift2 is a second shift parameter;

step 203, the base station calculates the number of resource block group RBGs according to a third calculation model according to the size of the bandwidth BWP, the first offset parameter, the second offset parameter, the start position of the BWP, and the size of the resource block group RBGs, where the third calculation model is as follows (3):

in the above formula (3), P is the resource block group RBG size, mod is the remainder operation;

step 204, the base station calculates the size of the configured resource block group RBG according to a fourth calculation model according to the frequency domain resource allocation method of type0, wherein the size comprises a first sub-model, a second sub-model and a third sub-module;

the first sub-module is used for calculating the size of the starting position resource block group RBG, and the first sub-module is as follows (4):

in the above-mentioned formula (4),

the size of the resource block group RBG of the starting position;

the second submodule is used for calculating the size of the last resource block group RBG, and the second submodule is as follows (5) and (6):

when (a + b) mod P>0，

If not, then the mobile terminal can be switched to the normal mode,

in the above formula (5) and the above formula (6),

the size of the last resource block group RBG;

the third submodule is used for calculating the sizes of the RBGs of the resource block groups except the first submodule and the second submodule and assigning the size P of the RBG of the resource block group to the sizes of the RBGs of the other resource block groups;

step 205, the base station numbers the RB positions in the resource block group RBGs from the starting position in the bandwidth range according to the ascending order of frequency based on all resource block group RBGs, and then determines the index of each RB according to the size of all resource block group RBGs.

Further, the step 3, the determining, by the base station according to each parameter of the resource block group, the scheduling information and sending the scheduling information to the user equipment includes:

step 301, the base station determines the scheduling information of the frequency domain resource allocation type0 according to all the calculated resource blocks RBG, and sends the scheduling information of the allocation type0 to the user equipment through a corresponding bitmap in the downlink control information of the physical downlink control channel.

Compared with the prior art, the invention has the beneficial effects that:

1. the resource allocation method solves the problem that in the prior art, the frequency domain resource allocation method based on the type0 can not schedule all RBs which can be used for transmission of the physical uplink shared channel due to the fact that the PUCCH occupies part of bandwidth, and improves the utilization rate of the RBs and the scheduling flexibility.

2. The resource allocation method is still a frequency domain resource allocation method based on the type0, and still keeps the characteristic of type0 scheduling.

Drawings

Fig. 1 is a flowchart illustrating steps of a resource allocation method according to the present invention.

Detailed Description

The invention is further described in detail with reference to the drawings.

Aiming at the problem that all available RB resources cannot be flexibly and sufficiently scheduled due to the fact that a small number of RBs in some RBGs are occupied by PUCCHs in the existing frequency domain resource allocation mode of NR physical uplink shared channel type0, a frequency domain resource allocation method based on type0 is provided, frequency offset configuration is introduced, the problem can be solved, and all available RB resources can be flexibly and sufficiently scheduled by the resource allocation mode of type0, and the method specifically comprises the following steps as shown in figure 1:

step 1, a base station pre-configures parameters and informs user equipment;

specifically, the step 1 includes:

Specifically, scene configuration is first performed, including the BWP start position being recorded as

BWP of size

RBG size is configured as P =16; PUCCH occupies 2 RBs each at both ends of the BWP bandwidth.

According to the configuration, the BWP is divided into 18 RBGs, designated as RBG 0-RBG 16, the first 16 RBGs have 16 RBs per RBG, and the last 1 RBG has 1 RB. PUCCH occupies the first 2 RBs in RBG0, the last 1 RB in RBG15, and the 1 st RB in RBG 16. Based on the bitmap allocation of the existing type0, only RBG1 to RBG14 can be allocated, while RBG0, RBG15 and RBG16 can not be scheduled, and the total of 29 RBs can not be scheduled.

However, according to the method of the present invention, first, the RB shift parameter RBShift is configured, and the parameter RBShift includes two parameters, a first shift parameter RBShift1 and a second shift parameter RBShift2. That is, the PUSCH-Config information element in the 3GPP technical Specification 38.331RRC message adds the following fields:

where P denotes the RRC configured RBG size. For this embodiment, P takes the value of 16.

And configuring the RBShift1 field in the RBShift cell into 2 according to the PUCCH configuration, and not configuring the RBShift2 field.

Finally, due to the adoption of RRC message configuration, the base station configures corresponding RB shift parameters RBShift for the UE through the corresponding RRC;

further, the configuration of the first offset parameter and the second offset parameter meets any one of the following rule requirements:

rule 4: and if the first offset parameter and the second offset parameter are configured differently, processing according to the actual configured offset parameter.

Step 2, the base station calculates each parameter of the resource block group according to the configuration parameter;

specifically, the step 2 includes:

step 201, the base station calculates the initial position of the processed bandwidth BWP according to a first calculation model according to the initial position of the bandwidth BWP and a first offset parameter, where the first calculation model is as follows (1):

the initial position of BWP is RBShift1 as a first shift parameter;

in the above equation (2), b is the size of the processed bandwidth BWP,

the first submodule is used for calculating the size of the starting position resource block group RBG, and the first submodule is as follows (4):

in the above-mentioned formula (4),

the size of the resource block group RBG of the starting position;

the second sub-module is used for calculating the size of the last resource block group RBG, and the second sub-module is as follows (5) and (6):

when (a + b) mod P>0，

If not, then the mobile terminal can be switched to the normal mode,

in the above formula (5) and the above formula (6),

the size of the last resource block group RBG;

step 205, the base station numbers the RB positions in the resource block group RBG from the starting position in the bandwidth range according to the ascending order of frequency based on all resource block group RBGs, and then determines the index of each RB according to the size of all resource block group RBGs.

Specifically, the base station calculates the RB number and RB index of each RBG, where the RB range corresponding to the allocation of each RBG is: starting RB is

RB number of

The number of RBGs is:

in this example, N _RBG =17, i.e. 17 RBGs in total. Wherein, the RB number of the 1 st RBG

Comprises the following steps:

in this example

Is 14.

RB number of last 1 RBG

Comprises the following steps: when (a + b) mod P>0，

If not, then,

in this example

Is 15.

The RB number of the other 15 RBGs is P =16.RBG in BWP range

Starting, numbering according to the ascending order of frequency; and determining the index of each RB according to the size of each RBG.

Specifically, the step 3 includes:

The present invention is not limited to the above-described embodiments, and any variations, modifications, and alterations that may occur to one skilled in the art without departing from the spirit of the invention are intended to be within the scope of the invention.

Claims

1. A method for allocating resources of a physical uplink shared channel (PUCCH) is characterized by comprising the following steps:

step 1, a base station pre-configures parameters and informs user equipment;

the initial position of BWP is RBShift1 as a first shift parameter;

in the above equation (2), b is the size of the processed bandwidth BWP,

the size of the bandwidth BWP is RBShift2, which is a second shift parameter;

in the above-mentioned formula (4),

the size of the resource block group RBG of the starting position;

when (a + b) mod P > 0,

if not, then,

in the above formula (5) and the above formula (6),

the size of the last resource block group RBG;

the third submodule is used for calculating the sizes of the RBGs of other resource block groups except the first submodule and the second submodule and assigning the size P of the RBG of the resource block group to the sizes of the RBGs of the other resource block groups;

step 205, the base station numbers the positions of the RBs in the resource block group RBG from the starting position in the bandwidth range according to the ascending order of the frequency based on all the resource block group RBGs, and then determines the index of each RB by combining the sizes of all the resource block group RBGs;

2. The method of claim 1, wherein the step 1 of the base station pre-configuring the parameters and notifying the ue comprises:

rule 1: the first offset parameter and the second offset parameter are optional configurations;

and 102, the base station sends an air interface message to the user equipment through a radio resource control message of the 3GPP according to the first offset parameter and the second offset parameter through the technical specification 38.331 of the 3 GPP.

3. The method of claim 1, wherein the step 3 of the base station determining the scheduling information according to the parameters of the resource block group and sending the scheduling information to the ue comprises: