CN113973271B - Repeated transmission method, device and user equipment - Google Patents

Repeated transmission method, device and user equipment Download PDF

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Publication number
CN113973271B
CN113973271B CN202010725021.5A CN202010725021A CN113973271B CN 113973271 B CN113973271 B CN 113973271B CN 202010725021 A CN202010725021 A CN 202010725021A CN 113973271 B CN113973271 B CN 113973271B
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message
theext
transmission
random access
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CN113973271A (en
Inventor
吴凯
李娜
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN202010725021.5A priority Critical patent/CN113973271B/en
Priority to PCT/CN2021/108290 priority patent/WO2022017526A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Abstract

The application discloses a repeated transmission method, a repeated transmission device and user equipment, and belongs to the technical field of communication. The problem that the UE cannot learn the receiving time of the MSG-B or MSG-2 can be solved. The method comprises the following steps: after finishing N times of repeated transmission of the first message, the UE starts a time window for receiving the second message; the first message is a message sent by the UE in the random access process, the second message is a message sent by the network equipment in the random access process, and N is a positive integer. The embodiment of the invention is applied to the process of repeated transmission of the message in the random access process by the UE.

Description

Repeated transmission method, device and user equipment
Technical Field
The application belongs to the technical field of communication, and particularly relates to a repeated transmission method, a repeated transmission device and user equipment.
Background
Ext> inext> generalext>,ext> aext> userext> equipmentext> (ext> UEext>)ext> mayext> transmitext> aext> correspondingext> messageext>,ext> suchext> asext> messageext> aext> (ext> i.e.ext>,ext> MSGext> -ext> aext>)ext> orext> messageext> 1ext> (ext> i.e.ext>,ext> MSGext> -ext> 1ext>)ext>,ext> toext> aext> networkext> deviceext> whenext> performingext> randomext> accessext>,ext> suchext> asext> twoext> -ext> stepext> randomext> accessext> (ext> 2ext> -ext> stepext> RACHext>)ext> orext> fourext> -ext> stepext> randomext> accessext> (ext> 4ext> -ext> stepext> RACHext>)ext>,ext> soext> thatext> theext> networkext> deviceext> mayext> transmitext> aext> correspondingext> randomext> accessext> responseext> (ext> RACHext> accessext> responseext>,ext> rarext>)ext>,ext> suchext> asext> messageext> bext> (ext> i.e.ext>,ext> MSGext> -ext> bext>)ext> orext> messageext> 2ext> (ext> i.e.ext>,ext> MSGext> -ext> 2ext>)ext>,ext> toext> theext> UEext> toext> implementext> aext> correspondingext> randomext> accessext> procedureext>.ext>
Ext> howeverext>,ext> inext> theext> randomext> accessext> procedureext>,ext> forext> someext> reasonsext> (ext> suchext> asext> limitedext> networkext> coverageext> orext> limitedext> UEext> capabilityext>)ext>,ext> thereext> isext> aext> problemext> thatext> theext> dataext> transmissionext> performanceext> isext> poorext> andext> theext> randomext> accessext> delayext> isext> largeext>,ext> soext> thatext> theext> transmissionext> performanceext> ofext> theseext> dataext> canext> beext> ensuredext> byext> repeatedext> transmissionext> ofext> MSGext> -ext> aext> orext> MSGext> -ext> 1ext>.ext> Ext> howeverext>,ext> inext> theext> caseext> ofext> theext> repeatedext> transmissionext> ofext> theext> MSGext> -ext> aext> orext> theext> MSGext> -ext> 1ext>,ext> thereext> isext> noext> clearext> schemeext> forext> theext> openingext> timingext> ofext> theext> timeext> windowext> ofext> theext> MSGext> -ext> bext> orext> theext> MSGext> -ext> 2ext>,ext> thatext> isext>,ext> theext> receivingext> timingext> ofext> theext> MSGext> -ext> bext> orext> theext> MSGext> -ext> 2ext> isext> notext> clearext>,ext> soext> thereext> isext> aext> problemext> thatext> theext> ueext> cannotext> knowext> theext> receivingext> timingext> ofext> theext> MSGext> -ext> bext> orext> theext> MSGext> -ext> 2ext>.ext>
Disclosure of Invention
The embodiment of the application aims to provide a repeated transmission method, a repeated transmission device and user equipment, which can solve the problem that UE cannot know the receiving time of MSG-B or MSG-2.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides a retransmission method, where the retransmission method includes: after finishing N times of repeated transmission of the first message, the UE starts a time window for receiving the second message; the first message is a message sent by the UE in the random access process, the second message is a message sent by the network equipment in the random access process, and N is a positive integer.
In a second aspect, embodiments of the present application provide a retransmission apparatus, including: and opening the module. The starting module is used for starting a time window for receiving the second message after finishing N times of repeated transmission of the first message; the first message is a message sent by the UE in the random access process, the second message is a message sent by the network equipment in the random access process, and N is a positive integer.
In a third aspect, an embodiment of the present application provides a UE, where the UE includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, where the program or instruction implements the steps of the retransmission method according to the first aspect when executed by the processor.
In a fourth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement the steps of the retransmission method according to the first aspect.
In a fifth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction, and implement a retransmission method according to the first aspect.
In the embodiment of the application, after the UE completes N repeated transmissions of the first message, the UE opens a time window for receiving the second message. Under the condition that the UE performs the repeated transmission of the first message in the random access process, the UE can start a time window of the second message after finishing N times of repeated transmission so as to receive the second message sent by the network equipment, namely, the receiving time of the second message is after finishing N times of repeated transmission, so that the problem that the UE cannot know the receiving time of the second message can be avoided, and the effectiveness and the accuracy of the receiving of the second message by the UE can be ensured.
Drawings
Fig. 1 is one of schematic diagrams of a retransmission method according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a retransmission method according to an embodiment of the present disclosure;
fig. 3 is a third schematic diagram of a retransmission method according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a retransmission apparatus according to an embodiment of the present application;
fig. 5 is a second schematic structural diagram of a retransmission apparatus according to the embodiment of the present application;
fig. 6 is one of the hardware structural diagrams of a UE according to the embodiment of the present application;
Fig. 7 is a second schematic diagram of a hardware structure of a UE according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
Some concepts and/or terms related to the retransmission method, the retransmission device and the user equipment provided in the embodiments of the present application are explained below.
Four-step random access procedure (4-step RACH): in the 4-step RACH, the UE firstly transmits MSG-1 to the network equipment, wherein the MSG-1 comprises a preamble sequence (preamble); after the network device detects the preamble, MSG-2 can be sent to the UE, and the MSG-2 comprises a Random Access Response (RAR) message corresponding to the preamble; after receiving MSG-2, UE sends message 3 (MSG-3) to UE according to RAR indication; after the network device receives the MSG-3, the network device may send MSG-4 to the UE, where the MSG-4 includes a contention resolution identifier (contention resolution ID); and after receiving the MSG-4, the UE completes four-step random access. In the 4-step RACH procedure, uplink scheduling information (UL grant) is included in MSG-2 for transmitting RAR, and the UL grant may be used for scheduling MSG-3 and includes an indication of scheduling information related to transmitting MSG-3.
Two-step random access procedure (2-step RACH): in an NR system, in addition to supporting a 4-step RACH procedure, a 2-step RACH procedure is also supported. Ext>ext> inext>ext> theext>ext> 2ext>ext> -ext>ext> stepext>ext> RACHext>ext> procedureext>ext>,ext>ext> theext>ext> UEext>ext> mayext>ext> firstext>ext> transmitext>ext> MSGext>ext> -ext>ext> aext>ext> consistingext>ext> ofext>ext> twoext>ext> partsext>ext>,ext>ext> aext>ext> physicalext>ext> randomext>ext> accessext>ext> preambleext>ext> (ext>ext> prachext>ext> preambleext>ext>)ext>ext> andext>ext> aext>ext> physicalext>ext> uplinkext>ext> sharedext>ext> channelext>ext> (ext>ext> physicalext>ext> uplinkext>ext> sharedext>ext> channelext>ext>,ext>ext> puschext>ext>)ext>ext>.ext>ext> The transmission information of the PUSCH may include UE-ID information. Ext> afterext> theext> networkext> deviceext> receivesext> theext> MSGext> -ext> aext> sentext> byext> theext> UEext>,ext> theext> networkext> deviceext> mayext> sendext> theext> MSGext> -ext> bext> toext> theext> UEext>.ext> Ext> theext> networkext> deviceext> schedulesext> aext> physicalext> downlinkext> sharedext> channelext> (ext> physicalext> downlinkext> sharedext> channelext>,ext> PDSCHext>)ext> byext> aext> physicalext> downlinkext> controlext> channelext> (ext> physicalext> downlinkext> controlext> channelext>,ext> PDCCHext>)ext> scrambledext> byext> anext> MSGext> -ext> Bext> -ext> radioext> networkext> temporaryext> identifierext> (ext> radioext> networkext> temporyext> identityext>,ext> RNTIext>)ext>,ext> theext> PDSCHext> mayext> includeext> aext> UEext> -ext> IDext>,ext> andext> afterext> detectingext> theext> UEext> -ext> IDext> transmittedext> inext> theext> MSGext> -ext> aext>,ext> theext> UEext> considersext> thatext> contentionext> resolutionext> isext> successfulext>,ext> andext> feedsext> backext> aext> hybridext> automaticext> repeatext> requestext> acknowledgementext> (ext> hybridext> automaticext> repeatext> requestext> acknowledgementext>,ext> harqext> -ext> ackext>)ext> ofext> theext> MSGext> -ext> Bext> toext> theext> networkext> deviceext>.ext>
It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (long term evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (code division multiple access, CDMA), time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA), single-carrier frequency division multiple access (single-carrier frequency-division multiple access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. However, the following description describes an NR system for purposes of example and NR terminology is used in much of the following description, although the techniques may also be applied to applications other than NR system applications, such as the 6th generation (6th Generation,6G) communication system.
The UE in the embodiment of the present application may also be referred to as a terminal device, where the UE may be a mobile phone, a tablet (tablet personal computer), a laptop (laptop) or a terminal-side device such as a notebook, a personal digital assistant (personal digital assistant, PDA), a palmtop, a netbook, an ultra-mobile personal computer (mobile personal computer, UMPC), a mobile internet device (mobile internet device, MID), a wearable device or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), and the wearable device includes: a bracelet, earphone, glasses, etc. It should be noted that, the embodiments of the present application are not limited to specific types of UEs.
The network device in the embodiments of the present application may be a base station or a core network, where the base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (base transceiver station, BTS), a radio base station, a radio transceiver, a basic service set (basic service set, BSS), an extended service set (extended service set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a transmission receiving point (transmitting receiving point, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that, in the embodiments of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.
The repeated transmission method provided by the embodiment of the application is described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
An embodiment of the present application provides a retransmission method, and fig. 1 shows a flowchart of the retransmission method provided in the embodiment of the present application, where the method may be applied to a UE. As shown in fig. 1, the retransmission method provided in the embodiment of the present application may include the following steps 201 and 202.
Step 201, the UE performs repeated transmission of the first message.
Optionally, in the embodiment of the present application, the UE may perform repeated transmission of the first message according to configuration information of the network device.
Optionally, in an embodiment of the present application, the configuration information may include a number of repeated transmissions (i.e. a maximum number of transmissions) of the first message.
Ext> optionallyext>,ext> inext> theext> embodimentext> ofext> theext> presentext> applicationext>,ext> theext> firstext> messageext> mayext> beext> MSGext> -ext> aext> sentext> byext> theext> UEext> inext> aext> twoext> -ext> stepext> randomext> accessext> processext>;ext> Or, the first message may be MSG-1 sent by the UE in a four-step random access procedure; alternatively, the first message may be MSG-3 sent by the UE in a four-step random access procedure.
Step 202, after completing N repeated transmissions of the first message, the UE opens a time window for receiving the second message.
In this embodiment of the present application, the first message is a message sent by the UE in a random access process, the second message is a message sent by the network device in a random access process, and N is a positive integer.
Alternatively, in the embodiment of the present application, N may be configured for a network device, or predefined, or agreed upon by a protocol.
It will be appreciated that if the value of N is configured by the network device, the above step 202 may be understood as: the network device configures the condition that the UE opens a time window for receiving the second message to be: the UE completes N repeated transmissions of the first message.
Alternatively, in the embodiment of the present application, N may be a Nominal (Nominal) transmission number, or an actual (actual) transmission number.
It should be noted that, the nominal repetition number may be understood as the repetition number configured by the network device, and the actual transmission number may be understood as the actual transmission number of the UE.
Ext> alternativelyext>,ext> inext> theext> embodimentext> ofext> theext> presentext> applicationext>,ext> theext> actualext> transmissionext> timesext> mayext> beext> applicableext> toext> puschext> inext> MSGext> -ext> aext>.ext>
Optionally, in this embodiment of the present application, N is less than or equal to a preset number of times, where the preset number of times is a maximum number of transmission times (i.e., M in the embodiment described below) of the first message configured by the network device.
It should be noted that, if the first message is MSG-3, the preset number of times may be understood as the maximum number of transmissions of MSG3 configured or scheduled by the network device.
Ext> optionallyext>,ext> inext> theext> embodimentext> ofext> theext> presentext> applicationext>,ext> theext> firstext> messageext> isext> anext> MSGext> -ext> aext> sentext> byext> theext> UEext> inext> aext> twoext> -ext> stepext> randomext> accessext> procedureext>,ext> andext> theext> secondext> messageext> isext> anext> MSGext> -ext> bext> sentext> byext> theext> networkext> deviceext> inext> theext> twoext> -ext> stepext> randomext> accessext> procedureext>.ext>
Optionally, in the embodiment of the present application, the first message is MSG-1 sent by the UE in a four-step random access procedure, and the second message is MSG-2 sent by the network device in the four-step random access procedure.
Optionally, in the embodiment of the present application, the first message is MSG-3 sent by the UE in a four-step random access procedure, and the second message is MSG-4 sent by the network device in the four-step random access procedure.
Ext> optionallyext>,ext> inext> theext> embodimentext> ofext> theext> presentext> applicationext>,ext> ifext> theext> firstext> messageext> isext> aext> messageext> (ext> i.e.ext> MSGext> -ext> aext>)ext> sentext> byext> theext> UEext> inext> aext> twoext> -ext> stepext> randomext> accessext> procedureext>,ext> theext> nthext> transmissionext> ofext> theext> firstext> messageext> byext> theext> UEext> isext>:ext> The nth transmission preamble or the nth transmission uplink data channel.
Alternatively, in the embodiment of the present application, the uplink data channel may be PUSCH.
Optionally, in the embodiment of the present application, the second message may be a random access response (that is, RAR) sent by the network device in a random access procedure, where the RAR may be MSG-2 in a four-step random access procedure or MSG-B in a two-step random access procedure.
Optionally, in the embodiment of the present application, if the RAR is MSG-2, at least one of the following is included in the RAR: a random access radio network temporary identity (random access radio network temporary identifier, RA-RNTI) scrambled PDCCH and PDSCH scheduled by the PDCCH.
Optionally, in the embodiment of the present application, if the RAR is MSG-B, at least one of the following is included in the RAR: the MSG-B-RNTI scrambled PDCCH and a PDSCH scheduled by the PDCCH.
Optionally, in the embodiment of the present application, if the second message is MSG-4 sent by the network device in the four-step random access process, the second message includes contention resolution information.
It should be noted that, the UE opening the time window for receiving the second message may be understood as: the UE starts a Timer of the second message (e.g., RAR-Timer (e.g., MSG-2-Timer or MSG-B-Timer) or contention resolution (contention resolution) -Timer) or opens a corresponding window (e.g., RAR window (e.g., MSG-2window or MSG-B window)) to receive the response message of the network device.
Optionally, in this embodiment of the present application, the starting position of the time window is: the UE monitors the first symbol of the earliest control resource set of the public search space set of the preset type downlink control channel, and the initial symbol of the time window is the symbol after the target symbol. Wherein, the target symbol is: the UE transmits the last symbol of the random access occasion (RACH occision, RO) where the first message is located, or the last symbol of the transmission occasion (PUSCH occision, PO) where the UE transmits the uplink data channel at the nth time.
Optionally, in the embodiment of the present application, the start symbol of the time window may be a symbol after at least one symbol after the target symbol.
Ext> itext> canext> beext> appreciatedext> thatext> inext> oneext> mannerext>,ext> theext> aboveext> -ext> mentionedext> RARext> windowext> startsext> atext> theext> firstext> symbolext> ofext> theext> earliestext> CORESEText> thatext> theext> UEext> configuredext> byext> theext> networkext> deviceext> listensext> toext> theext> Typeext> -ext> 1ext> PDCCHext> cssetext>,ext> andext> afterext> theext> UEext> sendsext> atext> leastext> oneext> symbolext> afterext> theext> lastext> symbolext> ofext> theext> roext> whereext> theext> nthext> MSGext> -ext> 1ext> orext> MSGext> -ext> aext> isext> locatedext>.ext> In another manner, the RAR window starts at the first symbol of the earliest CORESET that the UE configured by the network device listens to the Type-1 PDCCH csset, and after the UE sends at least one symbol after the last symbol of the PO where the nth uplink data channel is located.
The repeated transmission method in the embodiment of the present application will be specifically described by a specific embodiment (i.e., embodiment one).
Example 1
Ext> inext> theext> RACHext> procedureext>,ext> MSGext> -ext> 1ext> (ext> PRACHext>)ext> andext> MSGext> -ext> aext> (ext> PRACHext> andext> puschext>)ext> mayext> beext> transmittedext> usingext> aext> repeatedext> transmissionext>.ext> For example, the network device configures or instructs to perform M (i.e., maximum number of transmissions) PRACH retransmissions, the UE may turn on the RAR window (i.e., MSG-2window or MSG-B window) after the nth transmission. Wherein N is more than or equal to 1 and M is more than or equal to 1. Ext> forext> theext> repeatedext> transmissionext> ofext> MSGext> -ext> Aext>,ext> theext> correspondingext> windowext> canext> beext> startedext> afterext> theext> Next> -ext> thext> premcableext> transmissionext> orext> atext> theext> timeext> ofext> theext> Next> -ext> thext> PUSCHext> transmissionext>.ext>
If n=m, after all the repeated transmissions are completed, the UE starts the corresponding window to receive the response of the network. If n=1, i.e. the UE completes one transmission, the corresponding window may be opened to receive the response message (e.g. MSG-2 or MSG-B) of the network.
N may be configured or indicated by the network device. N may or may not include the UE dropping the PRACH transmission. If the actual transmission is not performed, the UE counts transmission opportunities (may also be referred to as transmission opportunities) corresponding to the N transmissions no matter whether the actual transmission is performed or not, and starts the window after PRACH occalation of the N transmissions, and of course, at least one actual transmission is performed by the UE and then starts the window. Or if the transmission opportunity is not included, the UE does not count the transmission opportunity which is not performed, and opens the corresponding window after the N times of actual transmission are completed.
Ext> alternativelyext>,ext> inext> theext> embodimentext> ofext> theext> presentext> applicationext>,ext> ifext> theext> repeatedext> transmissionext> ofext> MSGext> -ext> aext> orext> MSGext> -ext> 1ext> isext> triggeredext> byext> pdcchext>,ext> theext> valueext> ofext> next> orext> theext> valueext> ofext> mext> mayext> beext> indicatedext> inext> theext> pdcchext>.ext>
Alternatively, in the embodiment of the present application, the value of N corresponding to MSG-3 may be indicated in the RAR or TC-RNTI scrambled PDCCH.
Ext> theext> RARext> windowext> startsext> atext> theext> firstext> symbolext> ofext> theext> earliestext> setext> ofext> controlext> resourcesext> (ext> CORESEText>)ext> theext> networkext> deviceext> configuresext> theext> UEext> toext> listenext> toext> aext> PDCCHext> commonext> searchext> spaceext> setext> (ext> commonext> searchext> spaceext>,ext> cssetext>)ext> ofext> aext> presetext> Typeext> (ext> e.g.ext>,ext> Typeext> -ext> 1ext>)ext> andext> afterext> theext> UEext> sendsext> theext> lastext> symbolext> ofext> theext> roext> orext> atext> leastext> oneext> symbolext> ofext> theext> nthext> MSGext> -ext> 1ext> orext> MSGext> -ext> aext>.ext>
It should be noted that the number of times of PRACH and PUSCH retransmission is not necessarily the same. The UE takes the last effective PUSCH occision as a reference time point for starting the MSG-B window.
If all the repeatedly transmitted PUSCH occalations are not valid occalations or are not transmitted for some reason, the UE uses the last PRACH occalation as a reference time point for the MSG-B window. Wherein an effective PUSCH occipital may be understood as a PUSCH occipital associated with occipital of PRACH transmissions.
In some cases, PUSCH may be caused to be not transmitted, e.g., PRACH is not transmitted, or PUSCH is sufficiently power transmitted for power control reasons, or because the group common PDCCH indicates that the symbol of PUSCH transmission is a downlink or flexible symbol, or the UE does not detect the group common PDCCH, or the uplink and downlink configuration differs between serving cells, or a listen before talk (listen before talk, LBT) failure on an unlicensed frequency band causes PUSCH to be not transmitted.
In the RACH procedure, MSG3 (PUSCH) may be transmitted using a repeated transmission. For example, the network device configures or instructs N MSG-3 retransmissions, the UE may start a contention resolution timer (contention resolution timer) after the nth transmission. Wherein N is more than or equal to 1 and M is more than or equal to 1.
If n=m, the UE starts the contention resolution timer after completing all the repeated transmissions. If n=1, the UE completes one transmission and starts the contention resolution timer.
N may be configured or indicated by the network. N may or may not include the UE since the MSG-3 transmission is discarded. If the actual transmission is not performed, the UE counts transmission opportunities corresponding to the N transmissions no matter whether the actual transmission is performed or not, and starts a contention resolution timer after the N-transmitted MSG-3 transmission resources, and of course, the UE performs at least one actual transmission and starts the window. Or if the number of the transmission opportunities is not included, the UE does not count the transmission opportunities which are not performed, and starts a contention resolution timer after completing N times of MSG-3 actual transmission. The UE starts the contention resolution timer on the next symbol (symbol) that completes the nth MSG-3 transmission.
The embodiment of the application provides a repeated transmission method, wherein after the UE completes N times of repeated transmission of a first message, the UE starts a time window for receiving a second message. Under the condition that the UE performs the repeated transmission of the first message in the random access process, the UE can start a time window of the second message after finishing N times of repeated transmission so as to receive the second message sent by the network equipment, namely, the receiving time of the second message is after finishing N times of repeated transmission, so that the problem that the UE cannot know the receiving time of the second message can be avoided, and the effectiveness and the accuracy of the receiving of the second message by the UE can be ensured.
Optionally, in the embodiment of the present application, N is smaller than a preset number of times. Referring to fig. 1, as shown in fig. 2, after the step 202, the repeated transmission method provided in the embodiment of the present application further includes the following step 301.
Step 301, after receiving the second message in the time window, the UE stops repeating the transmission of the first message.
It can be appreciated that in the case of N < M: after the UE receives the MSG-2, the UE may terminate the incomplete MSG-1 transmission; ext> alternativelyext>,ext> theext> UEext> mayext> terminateext> theext> incompleteext> MSGext> -ext> aext> transmissionext> afterext> receivingext> theext> MSGext> -ext> Bext>.ext>
In this embodiment of the present application, after receiving the second message in the time window, the UE may stop repeating the transmission of the first message to terminate transmission of the first message in advance, so as to avoid redundant repeated transmission of the first message, so as to save network resources.
Alternatively, in the embodiment of the present application, the above step 301 may be specifically implemented by the following step 301 a.
Step 301a, after receiving the first time period after the start of the second message in the time window, the UE stops repeating the transmission of the first message.
In an embodiment of the present application, the first time period includes at least one of: the time corresponding to the first preset number of symbols of the downlink data channel processing time and the time corresponding to the second preset number of symbols of the uplink data channel preparation time.
Ext> itext> canext> beext> appreciatedext> thatext> theext> UEext> startsext> PRACHext> orext> MSGext> -ext> aext> puschext> transmissionext> afterext> receivingext> atext> leastext> theext> firstext> timeext> periodext> afterext> theext> lastext> symbolext> ofext> theext> PDSCHext> ofext> MSGext> -ext> 2ext> orext> MSGext> -ext> Bext>.ext>
Alternatively, in the embodiment of the present application, the downlink data channel may be PDSCH.
Optionally, in the embodiment of the present application, the first preset number and the second preset number correspond to a capability of the UE or correspond to a type of the UE.
It should be noted that, specific descriptions of the first preset number and the second preset number will be described in the following embodiments, which are not repeated here.
Alternatively, in one possible implementation manner of the embodiment of the present application, the "UE stops repeating the transmission of the first message" in the step 301 or the step 301a may be specifically implemented by the following step 401.
Step 401, the UE stops repeating the transmission of the first message when the first message meets the first condition;
in an embodiment of the present application, the first condition includes at least one of:
the identification of the preamble sequence in the second message received by the UE is matched with the identification of the preamble sequence used by the first message; the method comprises the steps of,
the UE detects a random access-radio network temporary identity (RACH-radio network tempory identity, RA-RNTI) scrambled downlink control channel and the system frame number (system frame number, SFN) information in the downlink control channel corresponds to a physical random access occasion of preamble sequence transmission in the first message.
It will be appreciated that for stopping transmission of MSG-1, in one manner, the UE may stop transmission of MSG-1 if the preamble ID in the received RAR (i.e., MSG-2) matches the preamble-ID used by MSG-1. In another manner, the UE may stop transmission of MSG-1 if the RA-RNTI scrambled PDCCH is detected and the SFN information (partial SFN information or full SFN information) in the PDCCH corresponds to PRACH timing of preamble transmission in MSG-1.
Alternatively, in another possible implementation manner of the embodiment of the present application, the "stop repeating transmission of the first message" in the step 301 or the step 301a may be specifically implemented by the following step 402.
Step 402, the UE stops repeating the transmission of the first message if the first message satisfies the second condition.
In an embodiment of the present application, the second condition includes at least one of:
a medium access control (media access control, MAC) layer protocol data unit (protocol data unit, PDU) includes a contention resolution identity MAC Control Element (CE) of the UE, and matches with a common control channel-service data unit (common control channel-service data unit, CCCH-SDU) of an uplink data channel corresponding to the first message;
The first message contains a cell-radio network temporary identifier (cell-radio network temporary identifier, C-RNTI) MAC-CE, and the UE receives a downlink control channel scrambled by the C-RNTI; the method comprises the steps of,
the UE detects a downlink control channel scrambled by an RNTI (e.g., MSG-B-RNTI) corresponding to the second message, and SFN information in the downlink control channel corresponds to a physical random access occasion of preamble sequence transmission in the first message.
Ext>ext>ext> itext>ext>ext> willext>ext>ext> beext>ext>ext> appreciatedext>ext>ext> thatext>ext>ext> forext>ext>ext> stoppingext>ext>ext> transmissionext>ext>ext> ofext>ext>ext> MSGext>ext>ext> -ext>ext>ext> aext>ext>ext>,ext>ext>ext> inext>ext>ext> oneext>ext>ext> approachext>ext>ext>,ext>ext>ext> theext>ext>ext> ueext>ext>ext> mayext>ext>ext> stopext>ext>ext> transmissionext>ext>ext> ofext>ext>ext> MSGext>ext>ext> -ext>ext>ext> aext>ext>ext> ifext>ext>ext> theext>ext>ext> ueext>ext>ext> contentionext>ext>ext> resolutionext>ext>ext> identityext>ext>ext> (ext>ext>ext> contentionext>ext>ext> resolutionext>ext>ext> identityext>ext>ext>)ext>ext>ext> containedext>ext>ext> inext>ext>ext> theext>ext>ext> macext>ext>ext> subext>ext>ext> pduext>ext>ext> isext>ext>ext> macext>ext>ext> ceext>ext>ext> andext>ext>ext> matchesext>ext>ext> theext>ext>ext> ccchext>ext>ext> -ext>ext>ext> sduext>ext>ext> ofext>ext>ext> theext>ext>ext> MSGext>ext>ext> -ext>ext>ext> aext>ext>ext> puschext>ext>ext>.ext>ext>ext> Ext>ext> inext>ext> anotherext>ext> approachext>ext>,ext>ext> theext>ext> UEext>ext> mayext>ext> stopext>ext> theext>ext> transmissionext>ext> ofext>ext> MSGext>ext> -ext>ext> aext>ext> ifext>ext> theext>ext> cext>ext> -ext>ext> rntiext>ext> macext>ext> -ext>ext> ceext>ext> isext>ext> includedext>ext> inext>ext> theext>ext> MSGext>ext> -ext>ext> aext>ext> andext>ext> theext>ext> UEext>ext> receivesext>ext> theext>ext> cext>ext> -ext>ext> rntiext>ext> scrambledext>ext> pdcchext>ext>.ext>ext> Ext>ext> inext>ext> yetext>ext> anotherext>ext> mannerext>ext>,ext>ext> theext>ext> UEext>ext> mayext>ext> stopext>ext> transmissionext>ext> ofext>ext> MSGext>ext> -ext>ext> aext>ext> ifext>ext> theext>ext> MSGBext>ext> -ext>ext> RNTIext>ext> scrambledext>ext> PDCCHext>ext> isext>ext> detectedext>ext> andext>ext> SFNext>ext> informationext>ext> (ext>ext> partialext>ext> SFNext>ext> informationext>ext> orext>ext> fullext>ext> SFNext>ext> informationext>ext>)ext>ext> inext>ext> theext>ext> PDCCHext>ext> correspondsext>ext> toext>ext> prachext>ext> timingext>ext> ofext>ext> preambleext>ext> transmissionext>ext> inext>ext> MSGext>ext> -ext>ext> aext>ext>.ext>ext>
Ext> alternativelyext>,ext> inext> theext> embodimentext> ofext> theext> presentext> applicationext>,ext> inext> theext> caseext> whereext> theext> firstext> messageext> doesext> notext> satisfyext> theext> secondext> conditionext>,ext> theext> UEext> mayext> continueext> toext> performext> transmissionext> ofext> theext> unfinishedext> firstext> messageext> (ext> e.g.ext>,ext> MSGext> -ext> 1ext> orext> MSGext> -ext> aext>)ext>.ext>
Optionally, in the embodiment of the present application, in a contention or non-contention random access procedure, the UE stops repeating the transmission of the first message if the first message meets the second condition.
The repeated transmission method in the embodiment of the present application will be specifically described by a specific embodiment (i.e., embodiment two).
Example two
Ext>ext>ext>ext> theext>ext>ext>ext> networkext>ext>ext>ext> deviceext>ext>ext>ext> mayext>ext>ext>ext> configureext>ext>ext>ext> theext>ext>ext>ext> UEext>ext>ext>ext> toext>ext>ext>ext> performext>ext>ext>ext> multipleext>ext>ext>ext> repeatedext>ext>ext>ext> transmissionsext>ext>ext>ext> ofext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> 1ext>ext>ext>ext> orext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> aext>ext>ext>ext> andext>ext>ext>ext> turnext>ext>ext>ext> onext>ext>ext>ext> theext>ext>ext>ext> correspondingext>ext>ext>ext> windowext>ext>ext>ext> toext>ext>ext>ext> receiveext>ext>ext>ext> theext>ext>ext>ext> responseext>ext>ext>ext> messageext>ext>ext>ext> (ext>ext>ext>ext> e.g.ext>ext>ext>ext>,ext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> 2ext>ext>ext>ext> orext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> bext>ext>ext>ext>)ext>ext>ext>ext> ofext>ext>ext>ext> theext>ext>ext>ext> networkext>ext>ext>ext> deviceext>ext>ext>ext> uponext>ext>ext>ext> completionext>ext>ext>ext> ofext>ext>ext>ext> next>ext>ext>ext> <ext>ext>ext>ext> mext>ext>ext>ext> transmissionsext>ext>ext>ext>,ext>ext>ext>ext> theext>ext>ext>ext> UEext>ext>ext>ext> mayext>ext>ext>ext> haveext>ext>ext>ext> receivedext>ext>ext>ext> theext>ext>ext>ext> responseext>ext>ext>ext> messageext>ext>ext>ext> ofext>ext>ext>ext> theext>ext>ext>ext> networkext>ext>ext>ext> deviceext>ext>ext>ext> beforeext>ext>ext>ext> completingext>ext>ext>ext> mext>ext>ext>ext> repeatedext>ext>ext>ext> transmissionsext>ext>ext>ext> ofext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> 1ext>ext>ext>ext> orext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> aext>ext>ext>ext>,ext>ext>ext>ext> i.e.ext>ext>ext>ext>,ext>ext>ext>ext> theext>ext>ext>ext> networkext>ext>ext>ext> deviceext>ext>ext>ext> hasext>ext>ext>ext> receivedext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> 1ext>ext>ext>ext> orext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> aext>ext>ext>ext>,ext>ext>ext>ext> soext>ext>ext>ext> thatext>ext>ext>ext> theext>ext>ext>ext> transmissionext>ext>ext>ext> mayext>ext>ext>ext> beext>ext>ext>ext> stoppedext>ext>ext>ext> forext>ext>ext>ext> mext>ext>ext>ext> -ext>ext>ext>ext> next>ext>ext>ext> outstandingext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> 1ext>ext>ext>ext> orext>ext>ext>ext> MSGext>ext>ext>ext> -ext>ext>ext>ext> aext>ext>ext>ext>.ext>ext>ext>ext> Ext> afterext> receivingext> theext> Text> 1ext> timeext> (ext> i.e.ext>,ext> theext> firstext> durationext> inext> theext> aboveext> embodimentext>)ext> afterext> theext> MSGext> -ext> 2ext> orext> MSGext> -ext> Bext>,ext> theext> UEext> stopsext> theext> subsequentext> transmissionext> ofext> theext> MSGext> -ext> 1ext> orext> MSGext> -ext> aext>.ext> Wherein the T1 time may comprise a time of at least one of: l1 (i.e., the first preset number in the above embodiment) times of PDSCH processing times correspond to symbols, and L2 (i.e., the second preset number in the above embodiment) times of PUSCH preparation times correspond to symbols.
Where L1 and L2 correspond to the processing capability of the UE. Ext> inext> oneext> implementationext>,ext> theext> timeext> forext> theext> lastext> symbolext> ofext> PDSCHext> ofext> RARext> (ext> orext> MSGext> -ext> Bext>)ext> andext> MSGext> -ext> 1ext> (ext> orext> MSGext> -ext> Aext>)ext> transmissionext> startext> symbolext> receivedext> atext> theext> UEext> isext> greaterext> thanext> orext> equalext> toext> Lext> T,1 +L T,2 Ext> inext> theext> caseext> ofext> +0.5ext> millisecondsext>,ext> theext> transmissionext> ofext> MSGext> -ext> 1ext> (ext> orext> MSGext> -ext> Aext>)ext> isext> stoppedext>.ext> Wherein L is T,1 Is the time corresponding to L1 symbol, L T,2 Is the time corresponding to L2 symbols.
Optionally, in the embodiment of the present application, N is smaller than a preset number of times. Referring to fig. 1, as shown in fig. 3, after the step 202, the repeated transmission method provided in the embodiment of the present application further includes the following step 501.
In step 501, the UE stops repeating the transmission of the first message if the first message satisfies the third condition.
In an embodiment of the present application, the third condition includes at least one of: the UE receives the second message, and the UE receives a first message scheduled by a temporary cell-radio network temporary identifier (TC-RNTI).
It can be appreciated that the UE may terminate the incomplete MSG-3 transmission after receiving the MSG-4; alternatively, the UE may terminate the outstanding MSG-3 transmissions after receiving the TC-RNTI scheduled MSG-3.
Optionally, in an embodiment of the present application, the third condition further includes at least one of:
the first message contains CCCH-SDU; the method comprises the steps of,
the UE detects the C-RNTI scrambled downlink control channel and the first message includes C-RNTI MAC CE (i.e., C-RNTI MAC CE was included in MSG-3), where the UE may be a connected UE.
Alternatively, in the embodiment of the present application, the downlink control channel may be PDCCH.
Optionally, in the embodiment of the present application, the first message includes CCCH-SDU. The third condition further includes: the UE successfully demodulates the second message, the MAC PDU in the second message contains the contention resolution identification (MAC CE) of the UE, and the MAC CE of the contention resolution identification of the UE is matched with the CCCH-SDU transmitted by the UE in the first message.
It will be appreciated that for stopping transmission of MSG-3, the UE may include a CCCH-SDU in MSG-3 and the UE successfully demodulates MSG-4, the MAC PDU in MSG-4 includes a contention resolution identity (contention resolution identity) of the UE, and the UE stops transmission of MSG-3 if the contention resolution identity of the UE matches the CCCH-SDU of the UE in MSG-3 transmission.
Alternatively, in the embodiment of the present application, in the case where the first message does not satisfy the third condition, the UE may continue to perform transmission of the unfinished first message (e.g., MSG-3).
Optionally, in the embodiment of the present application, after the UE receives the first time period after the second message (e.g. MSG-4) starts within the time window, the repeated transmission of the first message (e.g. MSG-3) is stopped. Wherein the first time period comprises at least one of: the time corresponding to the first preset number of symbols of the downlink data channel processing time and the time corresponding to the second preset number of symbols of the uplink data channel preparation time.
It can be appreciated that the UE starts MSG-3 transmission after receiving at least the first time period after the last symbol of the PDSCH of MSG-4.
The repeated transmission method in the embodiment of the present application will be specifically described by a specific embodiment (i.e., embodiment three).
Example III
The network device may configure the UE to perform multiple repeated transmissions of MSG-3, and start the corresponding contention resolution counter (contention resolution timer) to receive the contention resolution information of the network device (e.g., the contention resolution information carried in MSG-4) after N < M transmissions are completed, the UE may receive the response message of the network device before M repeated transmissions of MSG-3 are completed, i.e., the network device has received MSG-3, so that M-N incomplete MSG-3 may stop transmission. After receiving the T1 time (i.e., the first duration in the above embodiment) after the MSG-4, the UE stops the subsequent transmission of the MSG-3. Wherein the T1 time may comprise a time of at least one of: l1 (i.e., the first preset number in the above embodiment) times of PDSCH processing times correspond to symbols, and L2 (i.e., the second preset number in the above embodiment) times of PUSCH preparation times correspond to symbols.
Where L1 and L2 correspond to the processing capability of the UE. In one implementation, the time when the last symbol of the PDSCH of MSG-4 and the MSG-3 transmission start symbol are received by the UE is greater than or equal to L T,1 +L T,2 In the case of +0.5 ms, the transmission of MSG-3 is stopped. Wherein L is T,1 Is the time corresponding to L1 symbol, L T,2 Is the time corresponding to L2 symbols.
In this embodiment of the present application, the UE may stop repeating transmission of the first message when the first message meets the third condition, so as to terminate transmission of the first message in advance, thereby avoiding redundant repeated transmission of the first message, and saving network resources.
It should be noted that, in the retransmission method provided in the embodiment of the present application, the execution body may be a UE, or a retransmission apparatus, or a control module in the retransmission apparatus for executing the loading retransmission method. In the embodiment of the present application, a UE executing load retransmission method is taken as an example, and the retransmission method provided in the embodiment of the present application is described.
Fig. 4 shows a schematic diagram of a possible configuration of the retransmission apparatus according to the embodiment of the present application. As shown in fig. 4, the retransmission apparatus 40 may include: the module 41 is turned on.
Wherein, the opening module 41 is configured to open a time window for receiving the second message after completing N repeated transmissions of the first message; the first message is a message sent by the UE in the random access process, the second message is a message sent by the network equipment in the random access process, and N is a positive integer.
Ext> inext> oneext> possibleext> implementationext> mannerext>,ext> theext> firstext> messageext> isext> MSGext> -ext> aext> sentext> byext> theext> UEext> inext> aext> twoext> -ext> stepext> randomext> accessext> procedureext>,ext> andext> theext> secondext> messageext> isext> MSGext> -ext> bext> sentext> byext> theext> networkext> deviceext> inext> theext> twoext> -ext> stepext> randomext> accessext> procedureext>.ext> Or the first message is MSG-1 sent by the UE in the four-step random access process, and the second message is MSG-2 sent by the network equipment in the four-step random access process. Or the first message is MSG-3 sent by the UE in the four-step random access process, and the second message is MSG-4 sent by the network equipment in the four-step random access process.
In one possible implementation, N is configured for the network device, or predefined, or agreed upon by the protocol. N is less than or equal to a preset number of times, and the preset number of times is the maximum transmission number of the first message configured by the network equipment.
In one possible implementation, N is less than a preset number of times. Referring to fig. 4, as shown in fig. 5, the retransmission apparatus 40 provided in the embodiment of the present application further includes: the module 42 is stopped. Wherein, the stopping module 42 is configured to stop repeating the transmission of the first message after the opening module 41 opens the time window for receiving the second message and the second message is received in the time window.
In one possible implementation, the stopping module 42 is specifically configured to stop repeating the transmission of the first message after the UE receives the first time period after the start of the second message within the time window. Wherein the first time period comprises at least one of: the time corresponding to the first preset number of symbols of the downlink data channel processing time and the time corresponding to the second preset number of symbols of the uplink data channel preparation time.
In one possible implementation, the stopping module 42 is specifically configured to stop repeating the transmission of the first message if the first message meets the first condition. Wherein the first condition comprises at least one of:
the identification of the preamble sequence in the second message received by the UE is matched with the identification of the preamble sequence used by the first message; the method comprises the steps of,
the UE detects a downlink control channel scrambled by the RA-RNTI, and SFN information in the downlink control channel corresponds to physical random access time of preamble sequence transmission in the first message.
In a possible implementation manner, the stopping module 42 is specifically configured to stop repeating the transmission of the first message if the first message meets the second condition. Wherein the second condition comprises at least one of:
The MAC layer PDU contains a contention resolution identification (MAC CE) of the UE and is matched with a CCCH-SDU of an uplink data channel corresponding to the first message;
the first message contains C-RNTI MAC-CE, and the UE receives a downlink control channel scrambled by the C-RNTI; the method comprises the steps of,
the UE detects a downlink control channel scrambled by the RNTI corresponding to the second message, and SFN information in the downlink control channel corresponds to physical random access time of preamble sequence transmission in the first message.
In one possible implementation, N is less than a preset number of times. Referring to fig. 4, as shown in fig. 5, the retransmission apparatus 40 provided in the embodiment of the present application further includes: the module 42 is stopped. Wherein, the stopping module 42 is configured to stop repeating the transmission of the first message when the first message satisfies the third condition after the opening module 41 opens the time window for receiving the second message. Wherein the third condition comprises at least one of: the UE receives the second message and the UE receives the first message of TC-RNTI scheduling.
In one possible implementation manner, the third condition further includes at least one of the following:
the first message contains CCCH-SDU; the method comprises the steps of,
the UE detects the C-RNTI scrambled downlink control channel and the first message includes C-RNTI MAC CE.
In one possible implementation, the first message includes a CCCH-SDU. The third condition further includes: the UE successfully demodulates the second message, wherein the MAC PDU in the second message contains the contention resolution identification (MAC CE) of the UE, and the contention resolution identification (MAC CE) of the UE is matched with the CCCH-SDU transmitted by the UE in the first message.
In one possible implementation, if the first message is a message sent by the UE in the two-step random access procedure, the nth transmission of the first message by the UE is: the nth transmission preamble or the nth transmission uplink data channel.
In one possible implementation, the starting position of the time window is: the UE monitors the first symbol of the earliest control resource set of the public search space set of the preset type downlink control channel, and the initial symbol of the time window is the symbol after the target symbol. Wherein, the target symbol is: the UE transmits the last symbol of the RO where the first message is located, or the UE transmits the last symbol of the PO where the uplink data channel is located, for the nth time.
The embodiment of the application provides a repeated transmission device, which can open a time window of a second message after completing N times of repeated transmission under the condition that the repeated transmission device performs repeated transmission of a first message in a random access process so as to receive the second message sent by a network device, namely, the receiving opportunity of the second message is after completing N times of repeated transmission, so that the problem that the repeated transmission device cannot know the receiving opportunity of the second message can be avoided, and the effectiveness and the accuracy of the repeated transmission device for receiving the second message can be ensured.
The repeated transmission device in the embodiment of the application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, a UMPC, a netbook or PDA, and the non-mobile electronic device may be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a Television (TV), a teller machine, a self-service machine, or the like, and the embodiments of the present application are not limited in particular.
The retransmission apparatus in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
The repeated transmission device provided in the embodiment of the present application can implement each process implemented by the UE in the above method embodiment, and in order to avoid repetition, a description is omitted here.
Optionally, as shown in fig. 6, the embodiment of the present application further provides a UE 90, including a processor 91, a memory 92, and a program or an instruction stored in the memory 92 and capable of running on the processor 91, where the program or the instruction implements each process of the embodiment of the method when executed by the processor 91, and the process can achieve the same technical effect, and for avoiding repetition, a detailed description is omitted herein.
It should be noted that, the UE in the embodiment of the present application includes the mobile electronic device and the non-mobile electronic device described above.
Fig. 7 is a schematic hardware structure of a UE implementing an embodiment of the present application.
The UE 100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, and processor 110.
Those skilled in the art will appreciate that the UE 100 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically coupled to the processor 110 by a power management system to perform functions such as managing charging, discharging, and power consumption by the power management system. The UE structure shown in fig. 7 does not constitute a limitation of the UE, and the UE may include more or less components than illustrated, or may combine certain components, or may be arranged in different components, which are not described in detail herein.
Wherein the processor 110 is configured to open a time window for receiving the second message after completing N repeated transmissions of the first message; the first message is a message sent by the UE in the random access process, the second message is a message sent by the network equipment in the random access process, and N is a positive integer.
The embodiment of the present application provides a UE, where in the case where the UE performs repeated transmission of a first message in a random access process, the UE may start a time window of a second message after completing N times of repeated transmission, so as to receive the second message sent by a network device, that is, the receiving opportunity of the second message is after completing N times of repeated transmission, so that the problem that the UE cannot know the receiving opportunity of the second message can be avoided, and thus the validity and accuracy of the UE receiving the second message can be ensured.
It should be appreciated that in embodiments of the present application, the input unit 104 may include a graphics processor (Graphics Processing Unit, GPU) 1041 and a microphone 1042, the graphics processor 1041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 107 includes a touch panel 1071 and other input devices 1072. The touch panel 1071 is also referred to as a touch screen. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein. Memory 109 may be used to store software programs as well as various data including, but not limited to, application programs and an operating system. The processor 110 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the program or the instruction implement each process of the embodiment of the method, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the UE described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk or an optical disk, and the like.
The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used for running a program or an instruction, implementing each process of the above method embodiment, and achieving the same technical effect, so as to avoid repetition, and not repeated here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
It should be noted that, in this document, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), including several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims (18)

1. A method of repeating transmissions, the method comprising:
after finishing N times of repeated transmission of the first message, the user equipment UE starts a time window for receiving the second message;
the first message is a message sent by the UE in a random access process, the second message is a message sent by the network equipment in the random access process, and N is a positive integer;
ext> theext> firstext> messageext> isext> MSGext> -ext> Aext> sentext> byext> theext> UEext> inext> aext> twoext> -ext> stepext> randomext> accessext> processext>,ext> andext> theext> secondext> messageext> isext> MSGext> -ext> Bext> sentext> byext> theext> networkext> equipmentext> inext> theext> twoext> -ext> stepext> randomext> accessext> processext>;ext>
Or alternatively, the process may be performed,
the first message is MSG-3 sent by the UE in a four-step random access process, and the second message is MSG-4 sent by the network equipment in the four-step random access process;
n is configured by the network equipment, or predefined, or agreed by the protocol;
n is smaller than or equal to preset times, wherein the preset times are the maximum transmission times of the first message configured by the network equipment;
after the opening of the time window for receiving the second message, the method further comprises:
stopping repeatedly transmitting a target message by the UE after a first time length after the second message is received in the time window, wherein the target message is a message which is not transmitted in the first message;
The first time period includes at least one of: the time corresponding to the first preset number of symbols of the downlink data channel processing time and the time corresponding to the second preset number of symbols of the uplink data channel preparation time.
2. The method of claim 1, wherein the ceasing to repeat transmitting the first message comprises:
stopping repeating transmission of the first message if the first message meets a first condition;
wherein the first condition includes at least one of:
the identification of the preamble sequence in the second message received by the UE is matched with the identification of the preamble sequence used by the first message; the method comprises the steps of,
the UE detects a downlink control channel scrambled by a random access-radio network temporary identifier RA-RNTI, and the system frame number SFN information in the downlink control channel corresponds to the physical random access time of the preamble sequence transmission in the first message.
3. The method of claim 1, wherein the ceasing to repeat transmitting the first message comprises:
stopping repeating transmission of the first message if the first message meets a second condition;
Wherein the second condition includes at least one of:
the Media Access Control (MAC) layer protocol data unit PDU contains a contention resolution identification (MAC) control unit (CE) of the UE and is matched with a common control channel-service data unit (CCCH-SDU) of an uplink data channel corresponding to the first message;
the first message contains a cell radio network temporary identifier C-RNTI MAC-CE, and the UE receives a downlink control channel scrambled by the C-RNTI; the method comprises the steps of,
the UE detects a downlink control channel scrambled by the RNTI corresponding to the second message, and SFN information in the downlink control channel corresponds to physical random access time of preamble sequence transmission in the first message.
4. The method of claim 1, wherein N is less than the preset number of times;
after the opening of the time window for receiving the second message, the method further comprises:
the UE stops repeating the transmission of the first message under the condition that the first message meets a third condition;
wherein the third condition includes at least one of: the UE receives the second message, and the UE receives the first message scheduled by a temporary cell radio network temporary identifier TC-RNTI.
5. The method of claim 4, wherein the third condition further comprises at least one of:
the first message comprises a CCCH-SDU; the method comprises the steps of,
the UE detects a C-RNTI scrambled downlink control channel and the first message includes C-RNTI MAC CE.
6. The method of claim 5, wherein the first message comprises a CCCH-SDU;
the third condition further includes: the UE successfully demodulates the second message, the MAC PDU in the second message contains the contention resolution identification (MAC CE) of the UE, and the MAC CE of the contention resolution identification of the UE is matched with the CCCH-SDU transmitted by the UE in the first message.
7. The method according to claim 1, wherein if the first message is a message sent by the UE in a two-step random access procedure, the nth transmission of the first message by the UE is: the nth transmission preamble or the nth transmission uplink data channel.
8. The method of claim 1, wherein the starting position of the time window is: the UE monitors a first symbol of the earliest control resource set of a public search space set of a preset type downlink control channel, and the initial symbol of the time window is a symbol after a target symbol;
Wherein, the target symbol is: and the UE transmits the last symbol of the random access opportunity RO where the first message is located, or transmits the last symbol of the transmission opportunity PO where the uplink data channel is located, for the Nth time.
9. A retransmission apparatus, characterized in that the retransmission apparatus comprises: opening the module;
the starting module is used for starting a time window for receiving the second message after finishing N times of repeated transmission of the first message;
the first message is a message sent by User Equipment (UE) in a random access process, the second message is a message sent by network equipment in the random access process, and N is a positive integer;
ext> theext> firstext> messageext> isext> MSGext> -ext> Aext> sentext> byext> theext> UEext> inext> aext> twoext> -ext> stepext> randomext> accessext> processext>,ext> andext> theext> secondext> messageext> isext> MSGext> -ext> Bext> sentext> byext> theext> networkext> equipmentext> inext> theext> twoext> -ext> stepext> randomext> accessext> processext>;ext>
Or alternatively, the process may be performed,
the first message is MSG-3 sent by the UE in a four-step random access process, and the second message is MSG-4 sent by the network equipment in the four-step random access process;
n is configured by the network equipment, or predefined, or agreed by the protocol;
n is smaller than or equal to preset times, wherein the preset times are the maximum transmission times of the first message configured by the network equipment;
The retransmission apparatus further includes: stopping the module;
the stopping module is configured to stop, after the opening module opens a time window for receiving a second message and receives a first time period after the second message starts in the time window, repeating transmission of a target message, where the target message is a message that is not transmitted in the first message;
the first time period includes at least one of: the time corresponding to the first preset number of symbols of the downlink data channel processing time and the time corresponding to the second preset number of symbols of the uplink data channel preparation time.
10. The apparatus according to claim 9, wherein the stopping module is configured to stop the repeated transmission of the first message if the first message satisfies a first condition;
wherein the first condition includes at least one of:
the identification of the preamble sequence in the second message received by the UE is matched with the identification of the preamble sequence used by the first message; the method comprises the steps of,
the UE detects a downlink control channel scrambled by a random access-radio network temporary identifier RA-RNTI, and the system frame number SFN information in the downlink control channel corresponds to the physical random access time of the preamble sequence transmission in the first message.
11. The apparatus according to claim 9, wherein the stopping module is configured to stop the repeated transmission of the first message if the first message satisfies a second condition;
wherein the second condition includes at least one of:
the Media Access Control (MAC) layer protocol data unit PDU contains a contention resolution identification (MAC) control unit (CE) of the UE and is matched with a common control channel-service data unit (CCCH-SDU) of an uplink data channel corresponding to the first message;
the first message contains a cell radio network temporary identifier C-RNTI MAC-CE, and the UE receives a downlink control channel scrambled by the C-RNTI; the method comprises the steps of,
the UE detects a downlink control channel scrambled by the RNTI corresponding to the second message, and SFN information in the downlink control channel corresponds to physical random access time of preamble sequence transmission in the first message.
12. The apparatus of claim 9, wherein N is less than the preset number of times;
the retransmission apparatus further includes: stopping the module;
the stopping module is configured to stop repeating transmission of the first message when the first message meets a third condition after the opening module opens a time window for receiving the second message;
Wherein the third condition includes at least one of: the UE receives the second message, and the UE receives the first message scheduled by a temporary cell radio network temporary identifier TC-RNTI.
13. The apparatus of claim 12, wherein the third condition further comprises at least one of:
the first message comprises a CCCH-SDU; the method comprises the steps of,
the UE detects a C-RNTI scrambled downlink control channel and the first message includes C-RNTI MAC CE.
14. The apparatus of claim 13, wherein the first message comprises a CCCH-SDU;
the third condition further includes: the UE successfully demodulates the second message, the MAC PDU in the second message contains the contention resolution identification (MAC CE) of the UE, and the MAC CE of the contention resolution identification of the UE is matched with the CCCH-SDU transmitted by the UE in the first message.
15. The apparatus of claim 9, wherein if the first message is a message sent by the UE in a two-step random access procedure, the nth transmission of the first message by the UE is: the nth transmission preamble or the nth transmission uplink data channel.
16. The apparatus of claim 9, wherein the starting position of the time window is: the UE monitors a first symbol of the earliest control resource set of a public search space set of a preset type downlink control channel, and the initial symbol of the time window is a symbol after a target symbol;
wherein, the target symbol is: and the UE transmits the last symbol of the random access opportunity RO where the first message is located, or transmits the last symbol of the transmission opportunity PO where the uplink data channel is located, for the Nth time.
17. A user equipment UE comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the retransmission method according to any of claims 1 to 8.
18. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the repeat transmission method according to any of claims 1 to 8.
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