CN113853022A

CN113853022A - Uplink and downlink resource configuration indication method and device applied to carrier aggregation

Info

Publication number: CN113853022A
Application number: CN202111178972.6A
Authority: CN
Inventors: 韩丽华
Original assignee: Beijing Wuzi University
Current assignee: Beijing Wuzi University
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2021-12-28

Abstract

The application discloses a method for indicating uplink and downlink resource allocation in a wireless communication system, which comprises the following steps: the base station sends uplink and downlink resource allocation signaling on a carrier wave to indicate the uplink and downlink resource allocation of the carrier wave, and the uplink and downlink resource allocation of other carrier waves is the same as the uplink and downlink resource allocation of the carrier wave which sends the uplink and downlink resource allocation signaling; a base station or a terminal determines a carrier for sending an uplink and downlink resource configuration signaling according to the number of the carrier or the bandwidth and the frequency point of the carrier; and the base station configures the carrier wave for sending the uplink and downlink resource configuration signaling through the wireless resource control message.

Description

Uplink and downlink resource configuration indication method and device applied to carrier aggregation

Technical Field

The present invention relates to a wireless signal processing technology, and more particularly, to an uplink and downlink resource allocation indication method and apparatus applied to carrier aggregation in a 5G system.

Background

Carrier Aggregation (CA) is defined by the third Generation Partnership Project (3 GPP), and a User Equipment (UE) may simultaneously connect multiple carriers for uplink and downlink transmission, so as to improve throughput.

In the 5G New Radio (NR) standard, three indication forms of uplink and downlink resource configuration are defined: 1) configuring through Radio Resource Control (RRC) messages; 2) Configuring by Media Access Control (MAC); 3) The configuration is performed through Downlink Control Information (DCI). Wherein, the slot (time slot) level uplink and downlink resource configuration adjustment can be realized through the DCI configuration. The uplink and downlink resource allocation indication is sent independently on each carrier, and indicates the change of the uplink and downlink resource allocation of the carrier. The user terminal detects the indication information of the uplink and downlink resource allocation on each carrier, and if the indication information is successfully detected, the corresponding uplink and downlink resource allocation adjustment and data transmission are carried out.

Disclosure of Invention

In view of the above, the present invention provides the following technical solutions.

1. A signal processing method in a wireless communication system is applied to uplink and downlink resource allocation indication transmission, and is characterized in that:

the base station sends an uplink and downlink resource allocation signaling on a carrier wave to indicate the uplink and downlink resource allocation of the carrier wave, and the uplink and downlink resource allocation of other carrier waves is the same as the uplink and downlink resource allocation of the carrier wave sending the uplink and downlink resource allocation signaling.

2. The base station of claim 1 sends the uplink and downlink resource allocation signaling on a carrier, wherein the base station determines the carrier sending the uplink and downlink resource allocation signaling according to the number of the carrier or the bandwidth and frequency point of the carrier.

3. The carrier for sending ul-dl resource allocation signaling according to claim 2, wherein the carrier for sending the ul-dl resource allocation signaling is configured by the rrc message or polled according to the carrier number.

4. The carrier for determining the sending of the uplink and downlink resource allocation signaling according to the bandwidth and the frequency point of the carrier according to claim 2, wherein the carrier for sending the uplink and downlink resource allocation signaling is determined according to the weighted sum of the bandwidth and the frequency point of the carrier.

5. The weighted sum of claim 4, wherein the weighted sum = bandwidth of carriers cof1 + bins cof2, wherein cof1 and cof2 are fractions in the range of 0 to 1.

6. The signal processing method of claim 1, wherein the uplink and downlink resource allocation signaling comprises downlink control information and a medium access control unit.

7. A signal processing apparatus in a wireless communication system, for uplink and downlink resource allocation indication transmission, comprising:

As can be seen from the foregoing technical solutions, compared with the prior art, an embodiment of the present invention discloses a signal processing method and apparatus in a wireless communication system, where the method includes: the base station sends uplink and downlink resource allocation signaling on a carrier wave to indicate the uplink and downlink resource allocation of the carrier wave, and the uplink and downlink resource allocation of other carrier waves is the same as the uplink and downlink resource allocation of the carrier wave which sends the uplink and downlink resource allocation signaling; a base station or a terminal determines a carrier for sending an uplink and downlink resource configuration signaling according to the number of the carrier or the bandwidth and the frequency point of the carrier; and the base station configures the carrier wave for sending the uplink and downlink resource configuration signaling through the wireless resource control message.

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 introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a flowchart of a processing method for indicating uplink and downlink resource allocation according to an embodiment of the present invention;

fig. 2 is a schematic diagram of uplink and downlink resource allocation implicitly indicating multiple carriers by uplink and downlink configuration signaling sent by one carrier according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a carrier configured to transmit DCI configured by uplink and downlink resources using RRC message configuration according to an embodiment of the present invention;

fig. 4 is a schematic diagram of polling and transmitting DCI configured for uplink and downlink resources on multiple carriers according to an embodiment of the present invention;

fig. 5 is a schematic diagram of sending DCI configured for uplink and downlink resources according to bandwidth and frequency points of a carrier according to the embodiment of the present invention;

fig. 6 is a schematic structural diagram of an uplink and downlink resource allocation processing unit (transmission) according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an uplink and downlink resource allocation processing unit (receiving) according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a flowchart of a processing method for indicating uplink and downlink resource allocation according to an embodiment of the present invention. Referring to fig. 1, the method includes:

step 101: the base station selects a carrier to send an uplink and downlink resource allocation signaling and indicates the uplink and downlink resource allocation of the selected carrier. The carrier may be selected according to a predefined rule, e.g. based on a weighted sum of bandwidths and frequency points;

step 102: and the base station sends an uplink and downlink resource configuration signaling on the selected carrier. The signaling may be Downlink Control Information (DCI) or a media access control element (MAC CE). The dynamic adjustment of the uplink and downlink resource allocation of a slot level can be realized;

step 103: the terminal determines the uplink and downlink resource allocation of a plurality of carriers through the received uplink and downlink resource allocation signaling;

in the same frequency band (frequency band), if uplink and downlink resource configurations on different carriers are different, uplink and downlink signal transmission between different carriers will have interference. In addition, although it is flexible to send separate uplink and downlink resource allocation signaling on different carriers, it is difficult to implement on a base station product, and at the same time, a large signaling overhead is caused. The uplink and downlink resource allocation of other carriers is implicitly indicated through the uplink and downlink resource allocation signaling of one carrier, so that the signaling overhead can be saved, and the detection complexity of the terminal is reduced;

step 104: and after detecting the uplink and downlink resource configuration signaling, the terminal transmits data on the plurality of carriers according to the new uplink and downlink resource configuration.

Fig. 2 is a schematic diagram of implicitly indicating uplink and downlink resource allocation of multiple carriers according to an embodiment of the present invention. In this embodiment, 3 carriers are defined, where carrier 1 is used to transmit DCI for uplink and downlink resource configuration, and the uplink and downlink resource configuration of

carriers

2 and 3 is implicitly indicated by the DCI. For example, in slot 1 (slot #1), the DCI indicates that the uplink and downlink resource configuration of each slot in carrier 1 is 1:1 (7 symbols in 14 symbols are downlink and 7 symbols are uplink), and the uplink and downlink resource configuration of each slot in

carriers

2 and 3 is also 1: 1. Compared with the method for sending the DCI for the uplink and downlink resource configuration by each carrier, the embodiment can reduce the signaling overhead of the DCI and reduce the DCI blind detection complexity of the user.

Fig. 3 is a schematic diagram of configuring a carrier for transmitting uplink and downlink resource configuration DCI by using an RRC message according to an embodiment of the present invention. In this embodiment, 3 carriers can be aggregated (carrier 1, carrier 2, carrier 3), and which carrier transmits the DCI is configured by the RRC message. In this embodiment, the RRC configures carrier 2 to transmit the DCI, and the DCI implicitly indicates the uplink and downlink resource configurations of carrier 1 and carrier 3. Similar to fig. 2, this embodiment may reduce the signaling overhead of DCI, and reduce the DCI blind detection complexity of users.

Fig. 4 is a schematic diagram of polling and transmitting DCI for uplink and downlink resource configurations in multiple carriers according to an embodiment of the present invention. In slot 1 (slot #1), the DCI is transmitted on carrier 1, in slot 2 (slot #2), the DCI is transmitted on carrier 2, and in slot 3 (slot #3), the DCI is transmitted on carrier 3. The terminal also detects DCI on different carriers in this order. This sequential relationship is notified to the terminal by the base station through an RRC message or restricts the behavior of the terminal in a form defined in advance. This has the advantage that signalling load balancing of the DCI can be achieved.

Fig. 5 is a schematic diagram of sending DCI according to a bandwidth and a frequency of a carrier according to uplink and downlink resource configuration disclosed in an embodiment of the present invention. In this embodiment, three carriers may be subjected to carrier aggregation, i.e., carrier 1 (10 MHz, frequency point is 3.50 GHz), carrier 2 (20 MHz, frequency point is 3.51 GHz), and carrier 3 (50 MHz, frequency point is 3.56 GHz). Determining on which carrier the uplink and downlink resource configuration DCI is transmitted according to the following formula,

w = sum (B × conf1 + F _ C × conf2) formula 1

Where W is the weight, B is the carrier bandwidth, F _ C is the carrier bin, conf1 and conf2 are coefficients and are both equal to 1. According to the above assumption, carrier 3 has the largest W, and therefore, carrier 3 is selected as the carrier for transmitting the uplink and downlink resource allocation DCI. The terminal also detects the relevant DCI according to the formula. The embodiment has the advantage that RRC signaling can be further saved, and the base station and the terminal determine the carrier for transmitting the uplink and downlink resource configuration DCI according to the above formula.

Fig. 6 is a schematic structural diagram of an uplink and downlink resource allocation processing unit (transmission) disclosed in the embodiment of the present invention, where the uplink and downlink resource allocation processing unit (transmission) 20 includes:

an uplink and downlink resource configuration DCI processing module 201, configured to process uplink and downlink resource configuration DCI;

an uplink and downlink resource configuration DCI sending module 202, configured to send uplink and downlink resource configuration DCI.

Fig. 7 is a schematic structural diagram of an uplink and downlink resource allocation processing unit (receiver) according to an embodiment of the present invention, where the uplink and downlink resource allocation processing unit (receiver) 30 includes:

an uplink and downlink resource configuration DCI detection module 301, configured to detect uplink and downlink resource configuration DCI;

an uplink and downlink resource configuration application module 302, configured to configure uplink and downlink resources and transmission of related data.

The method and the device applied to the processing of the uplink and downlink resource configuration indication in the embodiment comprise the following steps: the uplink and downlink resource allocation indication sent on one carrier implicitly indicates the uplink and downlink resource allocation of other carriers; the carrier wave for sending the uplink and downlink resource configuration can be sent according to the serial number of the carrier wave or the bandwidth and the frequency point of the carrier wave; the uplink and downlink resource allocation indication comprises downlink control information and a media access control unit; other carriers are configured through radio resource control signaling; and sending a carrier wave indicated by the uplink and downlink resource configuration, and controlling the signaling configuration through the wireless resource.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.