CN113473627A

CN113473627A - Resource multiplexing method for NR system and NR system for realizing resource multiplexing

Info

Publication number: CN113473627A
Application number: CN202110787875.0A
Authority: CN
Inventors: 王哲; 郑建勇; 李文成; 李洪彬; 杨传东; 韦玲; 赵艳山; 水永升
Original assignee: Shanghai Zhongxing Yilian Communication Co ltd
Current assignee: Shanghai Zhongxing Yilian Communication Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-10-01
Anticipated expiration: 2041-07-13
Also published as: CN113473627B

Abstract

The invention has recorded a method used for resource multiplexing of NR system and NR system to realize resource multiplexing, notify UE through signaling to the time frequency domain resource bitmap in the slot of the present time slot through gNB base transceiver station; UE receives and decodes the signaling, and stores the bitmap to a local group; the gNB selects a currently enabled bitmap number through the DCI field and sends the bitmap number to the UE; the UE determines the specific bitmap content by referring to a local bitmap table according to the bitmap number; and the UE decodes the PDSCH according to the specific bitmap content so as to avoid the position of the corresponding PDCCH. In addition, the invention indicates whether the PDSCH decoded by the UE can use the resources or not by setting the frequency domain bitmap and the time domain bitmap, thereby distributing the unused frequency domain resources of CORESET in the system frequency band and the unused time frequency resources on the DCI frequency domain inside the CORESET to the PDSCH for use, avoiding the unusable resources under the condition of ensuring the DCI demodulation at the UE side, fully utilizing the unused or reusable resources, maximizing the utilization rate of the resources and avoiding the waste of the resources.

Description

Resource multiplexing method for NR system and NR system for realizing resource multiplexing

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a method for resource multiplexing in an NR system, an NR system for implementing resource multiplexing, and an electronic device.

Background

This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

With the development of the mobile internet, more and more devices are connected to the mobile network, and new services and applications emerge endlessly. The explosion of mobile data traffic will present a serious challenge to the network. To meet the increasing demand of mobile traffic, a fifth Generation (5th Generation, 5G) mobile communication network has been developed. The data transmission rate of the 5G network is faster than the wired internet, 100 times faster than the previous 4G LTE cellular network, and has a lower network delay.

In a communication system based on LTE (long term evolution cellular radio network), the system bandwidth is at most 20 MHz. The first 1-4 symbols of each downlink subframe are used for transmitting control signaling, and occupy the whole frequency band in the frequency domain. However, the data amount of the control signaling does not always occupy all the REs (Resource elements), and thus, a phenomenon of partial RE waste occurs. However, since the bandwidth of the LTE system is 20MHz at maximum, the waste of resources is not significant.

In a 5G communication system, NR (New Radio, New air interface, fifth generation New Radio) uses a Control-resource set (CORESET) Channel to indicate time-frequency resources occupied by a PDCCH (Physical Downlink Control Channel), and dynamically adjusts the time-frequency position of CORESET. The CORESET is used for transmitting time/frequency resources of the PDCCH, belongs to a group of physical resource sets, and consists of a plurality of RBs in a frequency domain and 1/2/3 OFDM symbols in a time domain. The PDCCH carries scheduling and other control information, specifically including transport format, resource allocation, uplink scheduling grant, power control, uplink retransmission information, and the like.

In NR systems, the system bandwidth can reach 400MHz at maximum. If the transmission information in NR still occupies the whole frequency band, it causes a very large waste of resources. As shown in fig. 1, a part of the frequency domain resources in the frequency band is used for the CORESET Channel, i.e. the CORESET is limited to a specific domain of the frequency domain, a part is used for transmitting PDSCH (Physical Downlink Shared Channel), and a part is UNUSED (UNUSED). Therefore, how to utilize the unused frequency domain resources of CORESET in the system band becomes urgent and meaningful.

Further, for each CORESET, DCI (Downlink Control Information) Information carried by the CORESET is dynamically changed. The time-frequency resources inside the CORESET are not always fully occupied. Even most of the time, only a few time-frequency resources within the CORESET are being used for transmitting DCI. As shown in fig. 2, a part of the frequency domain resources in the frequency band is used for the CORESET Channel, a part is used for transmitting the PDSCH (Physical Downlink Shared Channel), and a part is UNUSED (UNUSED); and in the CORESET channel, one part is used for transmitting DCI, and the other part except the DCI is unoccupied. Thus, there are wasted unused resources inside the CORESET. The DCI is carried by a Physical Downlink Control Channel (PDCCH), and downlink control information sent to the UE by the base station comprises uplink and downlink resource allocation, hybrid automatic repeat request (HARQ) information, power control and the like.

Therefore, it is desirable to provide a method and system for NR system resource reuse to improve system resource utilization.

Disclosure of Invention

In order to solve the above problems, the present invention provides a method for multiplexing NR system resources and an NR system for implementing resource multiplexing, which fully utilize unused frequency domain resources in the CORESET in the system frequency band and unused time-frequency resources in the CORESET to be all used for PDSCH data transmission, thereby avoiding waste of unused frequency domain resources and implementing secondary utilization of reusable resources, and effectively improving the utilization rate of system resources.

To achieve the above object, the present invention provides a method for NR system resource multiplexing, comprising the steps of:

s1: receiving a signaling sent by a base station, wherein the signaling comprises a time-frequency domain resource bitmap in a current slot;

s2: decoding signaling and storing the bitmap to a local group;

s3: decoding DCI, and acquiring a currently enabled bitmap number in a DCI field;

s4: according to the number of the bitmap, determining the specific bitmap content by contrasting a local bitmap table;

s5: and decoding the PDSCH according to the specific bitmap content so as to avoid the position of the corresponding PDCCH.

Optionally, all current resources are allocated to PDSCH by default.

Optionally, the time-frequency domain resource bitmap includes a time domain bitmap, and the time domain bitmap indicates a multiplexing condition on each symbol; wherein, the corresponding position of the time domain bitmap is 1, which indicates that the multiplexing exists on the current symbol; the corresponding position of the time domain bitmap is 0, which indicates that no multiplexing exists on the current symbol.

Optionally, the time-frequency domain resource bitmap includes a frequency domain bitmap set on each symbol, and the frequency domain bitmap indicates a multiplexing condition of a specific frequency domain resource; wherein, the corresponding position of the frequency domain bitmap is 0, which indicates that the PDSCH can use the corresponding resource; the corresponding position of the frequency domain bitmap is 1, which indicates that the PDSCH cannot use the corresponding resource.

Optionally, the method further comprises the following steps:

s11: receiving an updated signaling sent by a base station, wherein the signaling comprises a time-frequency domain resource bitmap updated in a current slot;

s12: decoding signaling and updating a local bitmap group;

s13: acquiring a new enabled bitmap number in a DCI field;

s14: decoding DCI, and determining new specific bitmap content by referring to a local bitmap table according to the bitmap number;

s15: and decoding the PDSCH according to the new specific bitmap content to avoid the position of the corresponding PDCCH.

In addition, the present invention also provides an NR system for implementing resource multiplexing, including a gNB base station (5G base station) and a UE (User Equipment/User terminal), wherein:

the gNB base station is used for sending a time-frequency domain resource bitmap in the current slot to the UE through a signaling; selecting a currently enabled bitmap number to send to the UE through the DCI field;

the UE is used for receiving and decoding the signaling and storing the bitmap to a local group; decoding DCI to obtain a bitmap number, and obtaining the current resource distribution bitmap content by contrasting a local bitmap table; and decoding the PDSCH according to the bitmap content to avoid the position of the corresponding PDCCH.

Optionally, the gNB base station sets a time domain bitmap to indicate the multiplexing condition on each symbol; wherein, the corresponding position of the time domain bitmap is 1, which indicates that the multiplexing exists on the current symbol; the corresponding position of the time domain bitmap is 0, which indicates that no multiplexing exists on the current symbol.

Optionally, the gNB base station sets a frequency domain bitmap on each symbol to indicate the multiplexing condition of the specific frequency domain resource; wherein, the corresponding position of the frequency domain bitmap is 0, which indicates that the PDSCH can use the corresponding resource; the corresponding position of the frequency domain bitmap is 1, which indicates that the PDSCH cannot use the corresponding resource.

Optionally, after the resource bitmap at the side of the gNB base station is updated, the UE is notified of the update through signaling interaction, and the specific flow is as follows:

the gNB sends the updated time-frequency domain bitmap to the UE through signaling, and informs the UE to update;

UE decodes the signaling and updates the local bitmap group;

selecting a new enabled bitmap number by the gNB through the DCI field, and sending the new enabled bitmap number to the UE;

the UE decodes the DCI, and determines new specific bitmap content by contrasting a local bitmap table according to the bitmap number;

and the UE decodes the PDSCH according to the new specific bitmap content so as to avoid the position of the corresponding PDCCH.

In addition, the present invention also provides an electronic device including:

a memory for storing a computer program;

a processor for executing the computer program stored in the memory, and when executed, implementing the above-described method for NR system resource multiplexing.

The invention has the advantages and beneficial effects that: compared with the situation of resource waste in the existing NR system, the invention provides a method for resource multiplexing of the NR system and the NR system for realizing the resource multiplexing, which completely use the unused frequency domain resources of the PDCCH for PDSCH transmission and specifically realize the following technical effects:

1. the frequency domain bitmap is arranged on each symbol to indicate the multiplexing condition of specific frequency domain resources and indicate whether the PDSCH decoded by the UE can use the resources, thereby realizing the multiplexing of unused frequency domain resources of CORESET in a system frequency band.

2. By setting the time domain bitmap, indicating the multiplexing condition on each symbol, indicating whether the PDSCH decoded by the UE can use the resource, and repeatedly utilizing the resource, the multiplexing of unused time-frequency resources in CORESET can be realized under the condition of ensuring DCI demodulation.

3. The base station allocates all available resources to inform the UE of corresponding utilization, then the UE obtains the available resource allocation, and performs PDSCH decoding according to the allocated resources to avoid the unavailable positions, so that the utilization rate of the resources is improved to the maximum extent.

4. After the base station updates the allocation of all available resources, the UE is informed of a new allocation scheme in time, so that the dynamic adjustment and the full utilization of the resource allocation are realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only part of the descriptions of some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 schematically shows a usage diagram of frequency domain resources in a frequency band of an NR system in the prior art;

fig. 2 is a schematic diagram illustrating the usage of the intra-band core set time-frequency resource in the NR system in the prior art;

FIG. 3 is a schematic diagram illustrating a usage of time-frequency resources for implementing resource multiplexing in an embodiment;

FIG. 4 is a diagram schematically illustrating a setting state of a time-frequency domain bitmap for implementing resource multiplexing in an embodiment;

fig. 5 schematically illustrates a flow diagram in a method and system for NR system resource multiplexing in an embodiment;

fig. 6 schematically shows a method for NR system resource multiplexing and a flow diagram after resource update in the system in an embodiment.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a method, system, apparatus, device, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.

In one embodiment, the present invention provides a method for resource multiplexing of an NR system, which is applied to a 5G communication system. The invention allocates all unused frequency domain resources of PDCCH to PDSCH for transmission, namely, the unused frequency domain resources of CORESET in a system frequency band are allocated to PDSCH for use, and unused time frequency resources on DCI frequency domain in CORESET are also allocated to PDSCH for use, and a resource allocation scheme is transmitted to the UE side, so that under the condition of ensuring that the UE side demodulates DCI, unusable resources are avoided, the unused or recyclable resources are fully utilized, and the utilization rate of the resources is improved to the maximum extent.

As shown in fig. 3, after resource multiplexing is implemented, the present invention allocates an UNUSED (UNUSED) region in the prior art to PDSCH, and allocates an UNUSED frequency domain inside the core set, except DCI, to PDSCH.

The method comprises the following steps:

s2: decoding signaling and storing the bitmap to a local group;

Wherein, various bitmap patterns can be configured in the signaling. Through the above steps, signaling interaction can be performed between the 5G base station and the UE (User Equipment/User terminal), and the UE side can receive and decode data and instructions sent by the base station to obtain an available resource multiplexing scheme, where the processing flows of the two are shown in fig. 5.

In the present embodiment, all the current resources are allocated to the PDSCH by default. The invention indicates the resource allocation condition of the PDSCH in the current slot (time slot) of the UE by designing a time-frequency domain resource bitmap.

In this embodiment, the time-frequency domain resource bitmap includes a time domain bitmap, and the time domain bitmap is used to indicate the multiplexing condition on each symbol; wherein, the corresponding position of the time domain bitmap is 1, which indicates that the multiplexing exists on the current symbol, and the corresponding position of the time domain bitmap is 0, which indicates that the multiplexing does not exist on the current symbol.

In this embodiment, the time-frequency domain resource bitmap includes a frequency domain bitmap set on each symbol, where the frequency domain bitmap is used to indicate a multiplexing condition of a specific frequency domain resource; when the corresponding position of the frequency domain bitmap is 0, the corresponding resource can be used by the PDSCH; when the corresponding position of the frequency domain bitmap is 1, it indicates that the PDSCH cannot use the corresponding resource. As shown in fig. 4, based on the above configuration, the purpose of resource multiplexing can be achieved by data transmission of the NR system.

In an embodiment, after the resource bitmap at the side of the gNB base station is updated, the UE may also be notified to update through signaling interaction, and the processing flows of the two are shown in fig. 6. The specific operation flow of the UE side comprises the following steps:

s11: receiving an updated signaling sent by a base station, wherein the signaling comprises an updated time-frequency domain resource bitmap in a current slot;

s12: decoding signaling and updating a local bitmap group;

s13: acquiring a new enabled bitmap number in a DCI field;

In an embodiment, the present invention further provides an NR system implementing resource multiplexing, where a gNB base station allocates all unused frequency domain resources of a PDCCH to a PDSCH for transmission, that is, the unused frequency domain resources of the CORESET in a system band are allocated to the PDSCH for use, and unused time-frequency resources inside the CORESET are also allocated to the PDSCH for use, and a resource allocation scheme is transmitted to a UE side, so that under the condition that the UE side is ensured to demodulate DCI, unusable resources can be avoided, unused or reusable resources can be fully utilized, and the utilization rate of resources is maximally improved. The system comprises a gNB base station and UE, wherein:

Wherein, various bitmap patterns can be configured in the signaling. In the NR system, signaling interaction can be performed between a base station and UE, the base station sends data and instructions to a UE side, and the UE side receives and decodes the data to obtain an available resource multiplexing scheme and avoid unavailable resources.

In this embodiment, as shown in fig. 5, in order to implement resource multiplexing, a specific procedure for signaling interaction and indication transmission between a base station and a UE in the NR system includes the following steps:

the gNB base station informs the UE of the time-frequency domain resource bitmap in the current slot through signaling;

UE receives and decodes the signaling, and stores the bitmap to a local group;

the gNB selects a currently enabled bitmap number through the DCI field and sends the bitmap number to the UE;

the UE determines the specific bitmap content by referring to a local bitmap table according to the bitmap number;

and the UE decodes the PDSCH according to the specific bitmap content so as to avoid the position of the corresponding PDCCH.

In this embodiment, the gNB base station allocates all current resources to the PDSCH by default. A time-frequency domain resource bitmap is designed at a gNB base station side to indicate the resource allocation condition of a PDSCH in a current slot (time slot) of a UE (User Equipment/User terminal), so that the UE side can obtain sufficient available resources.

In this embodiment, the gNB base station sets a time domain bitmap to indicate the multiplexing condition on each symbol; wherein, the corresponding position of bitmap is 1, which indicates that multiplexing exists on the current symbol; if the bit map corresponding position is 0, it indicates that there is no multiplexing on the current symbol.

In this embodiment, the gNB base station sets a frequency domain bitmap on each symbol to indicate the multiplexing condition of specific frequency domain resources; when the corresponding position of bitmap is 0, it indicates that the PDSCH can use the corresponding resource; when the bitmap corresponding position is 1, it indicates that the PDSCH cannot use the corresponding resource. As shown in fig. 4, based on the above configuration, the purpose of resource multiplexing can be achieved by data transmission of the NR system.

In an embodiment, as shown in fig. 6, after the resource bitmap at the side of the gNB base station is updated, the gNB base station further notifies the UE to update through signaling interaction, and the specific procedure is as follows:

the gNB sends the updated bitmap to the UE through signaling, and informs the UE to update; the signaling comprises a time-frequency domain resource bitmap in the current slot;

UE decodes the signaling and updates the local bitmap group;

the UE decodes the DCI, and determines the specific bitmap content by contrasting a local bitmap table according to the bitmap number;

Furthermore, in an embodiment, the present invention also provides an electronic device, including:

a memory for storing a computer program;

a processor for executing a computer program stored in the memory, and when the computer program is executed, implementing the above-described method for NR system resource multiplexing.

The electronic device of this embodiment may be an integrated circuit board, a PC (Personal Computer), or a portable Computer or other electronic device with a processor.

The memory may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) and/or cache memory. The processor executes various functional applications and data processing by executing a computer program stored in the memory, and in particular, the processor may execute the computer program stored in the memory, and when the computer program is executed, at least the following instructions are executed:

s2: decoding signaling and storing the bitmap to a local group;

Moreover, while the operations of the method of the invention are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.

While the spirit and principles of the invention have been described with reference to the above specific embodiments, it is to be understood that the invention is not limited to the specific embodiments disclosed, nor is the division of the aspects, which is for convenience only as the features in these aspects cannot be combined to advantage. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A method for NR system resource multiplexing comprising the steps of:

s2: decoding signaling and storing the bitmap to a local group;

2. A method for NR system resource multiplexing according to claim 1, characterized in that currently all resources are allocated to PDSCH by default.

3. A method for resource multiplexing for NR systems according to claim 1, characterized in that said time-frequency domain resource bitmap comprises a time domain bitmap, said time domain bitmap indicating the multiplexing situation on each symbol; wherein, the corresponding position of the time domain bitmap is 1, which indicates that the multiplexing exists on the current symbol; the corresponding position of the time domain bitmap is 0, which indicates that no multiplexing exists on the current symbol.

4. A method for resource multiplexing for NR systems according to claim 1, wherein said time-frequency domain resource bitmap comprises a frequency domain bitmap set on each symbol, said frequency domain bitmap indicating the multiplexing of specific frequency domain resources; wherein, the corresponding position of the frequency domain bitmap is 0, which indicates that the PDSCH can use the corresponding resource; the corresponding position of the frequency domain bitmap is 1, which indicates that the PDSCH cannot use the corresponding resource.

5. The method for resource multiplexing of NR system of claim 1 further comprising the steps of:

s12: decoding signaling and updating a local bitmap group;

s13: acquiring a new enabled bitmap number in a DCI field;

6. An NR system implementing resource multiplexing, comprising a gbb base station and a UE, wherein:

the gNB base station is used for sending a time-frequency domain resource bitmap in the current slot to the UE through signaling; selecting a currently enabled bitmap number to send to the UE through the DCI field;

7. The system for resource multiplexing of NR systems of claim 6, wherein the gNB base station sets a time domain bitmap indicating multiplexing on each symbol; wherein, the corresponding position of the time domain bitmap is 1, which indicates that the multiplexing exists on the current symbol; the corresponding position of the time domain bitmap is 0, which indicates that no multiplexing exists on the current symbol.

8. The system for multiplexing of resources of NR system of claim 6, wherein the gNB base station sets a frequency domain bitmap on each symbol indicating the multiplexing of specific frequency domain resources; wherein, the corresponding position of the frequency domain bitmap is 0, which indicates that the PDSCH can use the corresponding resource; the corresponding position of the frequency domain bitmap is 1, which indicates that the PDSCH cannot use the corresponding resource.

9. The system for resource multiplexing of the NR system of claim 6, wherein after the resource bitmap at the side of the gNB base station is updated, the UE is notified of the update through signaling interaction, and the specific procedure is as follows:

UE decodes the signaling and updates the local bitmap group;

10. An electronic device, comprising:

a memory for storing a computer program;

a processor for executing a computer program stored in a memory, and the computer program, when executed, implementing the method for NR system resource multiplexing of any one of claims 1 to 5.