CN111464278B

CN111464278B - High-reliability low-delay downlink communication method and equipment

Info

Publication number: CN111464278B
Application number: CN202010171134.5A
Authority: CN
Inventors: 戴曼; 任洁; 冯雪林; 杨小军; 石晶林
Original assignee: Institute of Computing Technology of CAS
Current assignee: Institute of Computing Technology of CAS
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2022-02-15
Anticipated expiration: 2040-03-12
Also published as: CN111464278A

Abstract

The embodiment of the invention provides a high-reliability low-delay downlink communication method and equipment, which comprises the steps that when a base station determines that a part of enhanced mobile broadband eMBB resources are used for transmitting a high-reliability low-delay communication URLLC service, the base station covers URLLC data to be transmitted in a downlink transmission unit which is already scheduled, and eMBB UE (enhanced mobile broadband) exclusive control information and URLLC UE exclusive control information are set in extra bandwidth; wherein the eMBB UE exclusive control information indicates the eMBB resources covered by the eMBB UE and used for URLLC service; and the exclusive control information of the URLLC UE indicates the covered eMBB resources of the URLLC UE for the URLLC service. The technical scheme of the embodiment of the invention can reduce the occupation of eMMC data resources, reduce the processing time delay of URLLC UE and ensure the eMMC service quality.

Description

High-reliability low-delay downlink communication method and equipment

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a high-reliability low-delay downlink communication method and apparatus.

Background

Currently, 5G communication is divided into three major application scenarios, namely enhanced Mobile BroadBand (eMBB), large-scale Machine Type communication (massive Machine Type communication), and high-reliability Low-delay communication (Ultra Reliable and Low Latency communication, urclc). Among them, URLLC service is extremely sensitive to the requirements of delay and reliability, so the delay-reduced communication technology becomes a research hotspot of future 5G communication. Specifically, the latency of 5G URLLC scenario communication needs to be controlled in milliseconds, and the frequency of data exchange reaches to tens of times per second. For example, the delay of a single transmission of a single data packet user plane air interface is not more than 1ms, and the total delay of multiple retransmissions is not more than 10ms, which brings great challenges to the prior art.

The subframe length of a 4G-based Long Term Evolution (LTE) is 1ms, and the same subframe length is adopted for 5G main scenes eMBB and LTE, so that compatibility among different systems is realized, and the laying cost of a communication network is reduced. However, URLLC traffic is bursty, and data transmission needs to be performed immediately when there is a demand for data transmission, so that multiplexing of eMBB and URLLC needs to be used to meet the low-latency communication demand. In the existing multiplexing mode, URLLC data directly occupies an eMBB data position, which may cause interference to an eMBB service, and not only uses an eMBB data resource position to transmit URLLC User Equipment (User Equipment, UE for short) data information, but also transmits URLLC UE control information, which may increase resource waste, and may also affect continuity of a large data service that needs to be segmented.

Disclosure of Invention

In order to solve various problems of the existing scheme, the invention provides a new communication method and communication equipment, which can improve eMBB quality and shorten URLLC time delay.

According to a first aspect of the invention, a method of wireless communication is provided. The method comprises the following steps:

when a base station determines that a part of enhanced mobile broadband eMBB resources are used for transmitting high-reliability low-delay communication URLLC service, the base station covers URLLC data to be transmitted in a downlink transmission unit which is already scheduled, and eMBB UE exclusive control information and URLLC UE exclusive control information are set in extra bandwidth;

wherein the eMBB UE exclusive control information indicates the eMBB resources covered by the eMBB UE and used for URLLC service; and

the exclusive control information of the URLLC UE indicates the covered eMBB resources of the URLLC UE for the URLLC service.

In one embodiment of the invention, the URLLC UE-specific control information further comprises an index of the candidate transmission mode set.

In an embodiment of the present invention, the candidate transmission mode set includes a plurality of transmission modes, and each transmission mode includes a retransmission number of each transmission, a Modulation and Coding Scheme (MCS), redundancy version information, subcarrier spacing information, and resource location information of each transmission.

In one embodiment of the present invention, further comprising:

configuring a candidate transmission mode set according to channel statistical information of URLLC UE;

URLLC UE is informed of the update of the set of candidate transmission modes.

In an embodiment of the present invention, wherein

The set is dynamically updated after the UE reports the channel quality information;

and/or after the transmission is finished, adjusting each transmission mode in the candidate transmission mode set according to whether the data packet is transmitted correctly.

In an embodiment of the present invention, the method further includes retransmitting, in the downlink transmission unit, the eMBB resource occupied by the URLLC service in the previous downlink transmission unit.

According to a second aspect of the invention, a method of wireless communication is provided. The method comprises the following steps:

the UE determines that eMBB UE exclusive control information or URLLC UE exclusive control information exists in the extra bandwidth;

and the UE receives the eMBB resources containing URLLC data according to the eMBB UE exclusive control information or the URLLC UE exclusive control information.

In an embodiment of the present invention, the receiving includes the eMBB UE removing the resource occupied by the URLLC service according to the eMBB UE dedicated control information, and feeding back the resource position occupied by the URLLC service to the base station.

In one embodiment of the invention, the receiving comprises:

URLLC UE acquires a candidate transmission mode set index according to the exclusive control information of the URLLC UE;

the URLLC UE acquires the transmission mode of the URLLC from the candidate transmission mode set according to the candidate transmission mode set index; and

and the URLLC UE receives the data packets transmitted for multiple times at the corresponding resource position according to the transmission mode, performs combination demodulation and acquires URLLC information.

In an embodiment of the present invention, the method further includes receiving a notification of update of the candidate transmission mode set by the base station, and the URLLC UE updating the local candidate transmission mode set.

In an embodiment of the present invention, the eMBB UE further receives the re-sent eMBB information occupied in the previous downlink transmission unit, and obtains the complete eMBB transmission content.

According to a third aspect of the present invention, there is provided an apparatus for a wireless communication base station. The apparatus comprises the following:

a transceiver;

a memory configured to store a computer program; and

a processor, wherein the transceiver and processor are configured to execute the computer program to implement the method of wireless communication of the first aspect of the invention.

According to a fourth aspect of the present invention, there is provided a User Equipment (UE) for wireless communication, the apparatus comprising:

a transceiver;

a memory configured to store a computer program; and

a processor, wherein the transceiver and processor are configured to execute the computer program to implement the method of wireless communication of the second aspect of the invention.

According to a fifth aspect of the present invention, there is provided a computer readable medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method of any one of the first or second aspects of the present invention.

Compared with the prior art, the invention has the advantages that: the extra bandwidth is used for providing the eMMC UE exclusive control information and the URLLC UE exclusive control information, the occupation of eMMC data resources can be reduced by using the extra bandwidth, and especially under the condition that the number of URLLC UEs is large and the URLLC UE control information is also large, if the extra bandwidth is not used, the occupation of the eMMC data resources is large. The exclusive control information of the URLLC UE uses the candidate transmission mode set index to replace a specific transmission parameter, and indicates the downlink transmission of the URLLC for multiple times by transmitting the exclusive control information once, so that the resource overhead can be saved, and the processing time delay of the URLLC UE can be reduced. The invention resends the polluted decoding error code block in the previous downlink transmission unit in the next downlink transmission unit without sending a complete eMB data packet, thereby saving resources, reducing power consumption and time delay, ensuring the integrity of eMB service data transmission and not causing interference to the eMB service.

Drawings

The disclosed aspects of the present invention are described below in conjunction with the appended drawings, which are provided to illustrate and not to limit the disclosed aspects, wherein like reference numerals denote like elements, and in which:

fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of subframe resource allocation according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of control information resource allocation according to an embodiment of the present invention.

Fig. 4 is a flowchart of a process flow of a base station transmitting a subframe according to an embodiment of the present invention.

Fig. 5 is a flowchart of a procedure for a reception process of a subframe by an eMBB UE according to one embodiment of the present invention.

Fig. 6 is a flowchart of a receiving process of a sub-frame by a URLLC UE according to an embodiment of the present invention.

Fig. 7A is a flowchart of a process of a base station feeding back URLLC UE according to an embodiment of the present invention.

Fig. 7B is a flow diagram of a process for feedback by a base station to an eMBB UE according to one embodiment of the invention.

Fig. 8A is a flow diagram of a base station processing a set of candidate transmission modes according to one embodiment of the invention.

Fig. 8B is a flow diagram of UE processing a set of candidate transmission modes according to one embodiment of the invention.

Fig. 9 is an exemplary diagram of a UE (user equipment) according to an embodiment of the present invention.

Fig. 10 is an exemplary diagram of a base station in accordance with an embodiment of the present invention.

Detailed Description

The following examples are provided only for illustrating the technical solutions of the present application and not for limiting the same, and those of ordinary skill in the art should understand that: modifications may be made to the embodiments described below, or equivalents may be substituted for some or all of their features without departing from the scope of the present application.

In the following embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The techniques described herein may be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SCFDMA, and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 releases 0 and A are commonly referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-DO, High Rate Packet Data (HRPD), and so on. UTRA includes wideband CDMA (wcdma) and other variants of CDMA. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDMTM, and the like. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-advanced (LTE-A) are new versions of UMTS that employ E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for the above-mentioned systems and wireless technologies, as well as other systems and wireless technologies, including cellular (e.g., LTE) communications over a shared radio spectrum band. However, the following description describes an LTE/LTE-a system for purposes of example, and LTE terminology is used in much of the description below, but the techniques may also be applicable outside of LTE/LTE-a applications (e.g., to 5G networks or other next generation communication systems).

Fig. 1 shows a schematic diagram of an existing communication system, which includes one or more base stations that can simultaneously provide services for multiple UEs, where eMBB UEs have large traffic, large number, low requirement on latency, and URLLC UEs have small traffic and are bursty.

Wherein a base station may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area, also referred to as a base transceiver station, radio base station, access point, access node, radio transceiver, node B, evolved node B (enb), gNB, home node B, home eNodeB, relay, or some other suitable terminology. The base stations may support communication protocols of different formats or may support different communication modes. The base station may use various communication technologies, for example, 5G (new radio or "NR"), fourth generation (4G)/LTE, 3G, Wi-Fi, bluetooth, and a communication technology of a Public Land Mobile Network (PLMN) that is an evolution in the future, and different communication technologies may overlap coverage in the same area.

Where a UE refers to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile terminal, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in the internet of things, a virtual reality device, a terminal device in a future 5G network, a terminal device in a future evolved Public Land Mobile Network (PLMN), or the like.

The inventor of the present invention has found that, because the URLLC service has the characteristics of short duration and burst, the base station can use the ongoing eMBB subframe for transmitting the URLLC service and allocate time and frequency resources to the URLLC service. When there is a need to send URLLC traffic during an ongoing eMBB subframe, the base station releases some resources already allocated to the eMBB traffic in order to accommodate URLLC transmissions. For example, eMBB UE-specific control information indicating which resources are released for URLLC traffic by eMBB UEs and URLLC UE-specific control information indicating control information of URLLC resources among these released resources may be provided in the extra bandwidth, i.e., the extra bandwidth, in which the base station and the UE may support the part of the bandwidth that is not currently used among the available bandwidths, i.e., the extra bandwidth.

Using the data resources already allocated to the eMBB traffic for transmitting URLLC traffic is also referred to as eMBB "contaminated".

One embodiment of the extra bandwidth is to provide eMBB UE-specific control information and URLLC UE-specific control information with guard bandwidth. The usage of the extra bandwidth can reduce the occupation of eMMC data resources, and especially under the condition that the number of URLLC UEs is large and the control information of the URLLC UEs is also large, if the extra bandwidth is not used, the occupation of the eMMC data resources is large.

The exclusive control information of the URLLC UE uses the index indication of a candidate transmission mode set, the candidate transmission mode set is configured by a base station according to the channel quality statistical information of the URLLC UE, the set can be dynamically updated by the base station after the UE reports the channel quality information, and after each transmission is finished, the base station can select to adjust each transmission mode in the candidate transmission mode set according to whether a data packet is correctly transmitted or not. After the UE reports the channel quality information or after each transmission is completed, in order to reduce the delay, the base station may select whether to update the candidate transmission mode set, and update the set only when the candidate transmission mode set needs to be updated. The set of candidate transmission modes includes the following information: retransmission times, MCS used for transmission, redundancy version information of initial transmission and retransmission, subcarrier interval information and resource positions of initial transmission and retransmission. And the base station sends the candidate transmission mode set to each URLLC UE through RRC signaling or a broadcast channel after updating the candidate transmission mode set each time.

The following is an example of a set of candidate transmission modes: { # 1: retransmitting for 1 time, wherein MCS is (QPSK,1/3), redundancy version is {0,3}, subcarrier interval is 15K, initial transmission occupies the full bandwidth of 4 th and 5 th symbols, and retransmission occupies the full bandwidth of 7 th and 8 th symbols; 2 times of retransmission, wherein MCS is (QPSK,1/5), the redundancy version is {0,0,0}, the subcarrier interval is 15K, the initial transmission occupies the full bandwidth of the 4 th and 5 th symbols, the primary retransmission occupies the full bandwidth of the 7 th and 8 th symbols, and the secondary retransmission occupies the full bandwidth of the 10 th and 11 th symbols; # 3: retransmission 3 times, MCS (QPSK,1/3), redundancy version {0,2,3,1}, subcarrier spacing 15K, initial transmission occupying full bandwidth of 4 th and 5 th symbols, one retransmission occupying full bandwidth of 7 th and 8 th symbols, second retransmission occupying full bandwidth of 9 th and 10 th symbols, and third retransmission occupying full bandwidth of 12 th and 13 th symbols }.

The exclusive control information of the URLLC UE uses the candidate transmission mode set index to replace a specific transmission parameter, and indicates the downlink transmission of the URLLC for multiple times by transmitting the exclusive control information once, so that the resource overhead can be saved, and the processing time delay of the URLLC UE can be reduced.

After the eMB UE acquires that the resources are occupied by the URLLC from the exclusive control information of the eMB UE, the eMB UE returns NACK and the occupied resources, namely the positions of the polluted resources, and the base station receives the eMB UE feedback NACK and the positions of the polluted resources, and then retransmits the polluted decoding error code blocks in the previous downlink transmission unit in the next downlink transmission unit without transmitting a complete eMB data packet, so that the resources are saved, the power consumption and the time delay are reduced, the integrity of eMB service data transmission is ensured, and the eMB service is not interfered.

Fig. 2 shows an example of URLLC UEs multiplexing eMBB UEs in the same subframe, according to an embodiment of the present invention. When there is no URLLC UE data transmission requirement, the first 3 symbols of the subframe are used for the eMBB control information of the eMBB UE data to indicate the eMBB data transmission of the last 11 symbols, where the eMBB control information includes resource location indication, MCS, initial transmission/retransmission indication, redundancy version indication, and HARQ process number. Since the URLLC UE traffic is bursty, after the downlink transmission unit has completed scheduling, it may happen that URLLC UE data is urgently to be transmitted. At this time, the base station covers the data of the URLLC UE on the last 11 symbols in the downlink transmission unit which has finished scheduling, so as to preferentially ensure the time delay and reliability requirements of the URLLC UE service. In the example of fig. 2, the 7 th, 8 th, 11 th, 12 th symbols are used for URLLC transmission.

According to one embodiment of the invention, a base station sends eMB UE exclusive control information and URLLC UE exclusive control information through occupying a protection bandwidth, eMB UE removes URLLC data information from the last 11 symbols according to the eMB UE exclusive control information, and URLLC UE obtains the URLLC data information from the last 11 symbols according to the URLLC UE exclusive control information.

Fig. 3 shows an example of eMBB UE-specific control information and URLLC UE-specific control information carried in the guard bandwidth, where the guard bandwidth resource transmission corresponding to 1,2,3 symbols is used for eMBB UE-specific control information, and the guard bandwidth resource transmission corresponding to 4,5, 6, 7,8,9,10 symbols is used for URLLC UE-specific control information, where there are two URLLC UEs in this example, the 4,5, 6 symbols are used for URLLC UE1, and the 7,8,9,10 symbols are used for URLLC UE 2. The 11 th, 12 th, 13 th, 14 th symbols are not used.

Fig. 4 shows a process flow diagram of a base station transmitting a subframe according to one embodiment of the invention. In step 430, when there is URLLC UE data to be transmitted in the base station, the base station allocates eMBB UE-specific control information and URLLC UE-specific control information within the protection bandwidth of the downlink transmission unit of this time. The eMBB UE-specific control information includes a resource location indication of the URLLC UE. Wherein the URLLC UE-specific control information comprises a URLLC UE candidate transmission mode set index.

In step 440, the eMBB UE specific control information is scrambled using the C-RNTI of the eMBB UE. And the exclusive control information of the URLLC UE is scrambled by using the C-RNTI of the URLLC UE.

In step 450, after the time domain position where the dedicated control information of the URLLC UE appears, data information corresponding to the URLLC UE is allocated, and the URLLC data is covered on the symbol occupied by the scheduled downlink transmission unit eMBB data.

After the base station sends the subframes, the eMBB UE and the URLLC UE respectively receive the subframes.

Fig. 5 shows a reception process of a subframe by an eMBB UE according to one embodiment of the present invention.

In step 510, it needs to first detect whether eMBB UE-specific control information exists in the guard bandwidth of the downlink transmission unit. If eMB UE-specific control information is detected in the guard bandwidth, the eMB UE-specific control information is first received.

In step 520, the eMBB UE will know the resource location information covered by the URLLC UE data after completing receiving the eMBB UE dedicated control information.

In step 525, from the control information of the subframe, i.e., the information carried by the 1 st, 2 nd, and 3 rd symbols of the subframe, the eMBB UE knows the resource location information before preemption by the URLLC, and after removing the resource occupied by the URLLC UE, the eMBB UE can receive information at the correct resource location with a given MCS, thereby avoiding the contaminated information from reducing the transmission quality.

In step 530, it is determined whether the reception of the eMBB data is successful.

In step 540, if the eMBB data is successfully received, an ACK is fed back to the base station.

In step 545, if the eMBB data reception fails, it is determined whether the reception of the contaminated part of the data fails and the reception of the other position data succeeds.

In step 550, if the contaminated portion data fails to be received and the other location data is successfully received, NACK and a contaminated resource location indication are fed back.

In step 555, if all data reception fails, NACK is fed back.

In step 560, if there is no eMBB UE-specific control information in the guard bandwidth, it is considered that there is no pollution caused by data transmission of URLLC UEs, and the eMBB UEs receive data at the specified resource location according to the indication of the control information of 1 st, 2 nd, 3 th symbols.

In step 565, it is determined whether the data was received successfully.

In step 570, if the data reception is successful, an ACK is fed back to the base station.

In step 580, if the data reception fails, NACK is fed back to the base station.

Fig. 6 shows a receiving process of a sub-frame by a URLLC UE according to an embodiment of the present invention.

In step 610, it is first required to detect whether there is URLLC UE-specific control information in the guard bandwidth.

In step 620, if there is URLLC UE dedicated control information, the URLLC UE receives the URLLC UE dedicated control information, and descrambles the dedicated control information with its own C-RNTI to obtain the candidate transmission mode set index.

In step 625, the URLLC UE can obtain information such as the transmission times, transmission position, MCS, and redundancy version of the data packet transmitted this time according to the indication of the candidate transmission mode configuration set index.

In step 630, the URLLC UE receives the data packets transmitted multiple times at the corresponding resource location with the specified MCS according to the transmission mode indicated by the candidate transmission mode set index, and performs combining demodulation.

In step 635, once the data packet is successfully received, an ACK is fed back, and the subsequently received data packet is directly discarded. If the data decoding fails after all the transmissions are completed, a NACK is fed back.

In step 640, if there is no URLLC UE dedicated control information in the guard bandwidth, it is assumed that there is no URLLC information in the subframe, and the subframe does not need to be processed.

Fig. 7A shows a process flow of feedback from a base station to a URLLC UE according to an embodiment of the present invention.

In step 710, it is determined whether the feedback content is ACK or NACK when receiving URLLC feedback.

In step 715, if ACK is checked, the transmission to the URLLC UE is completed.

In step 720, the channel state information and the candidate transmission mode set of the URLLC UE are updated.

In step 725, if receiving the feedback NACK from the URLLC UE, the candidate transmission mode set of the URLLC UE is updated.

In step 730, it is determined whether the time delay is within the allowable range.

In step 735, if the data packet is not within the allowable range of the delay, the data packet is not transmitted any more, and the transmission is considered to be failed.

In step 740, if the URLLC information is within the allowable range of the delay, the method starts from step 430 in fig. 4.

Fig. 7B shows a process flow for feedback by a base station to an eMBB UE according to one embodiment of the invention.

In step 750, the eMBB UE feedback is received, and whether the feedback is ACK or NACK is determined.

In step 755, if the ACK is received, the transmission to the eMBB UE is completed.

In step 760, if NACK is received, it is determined whether the contaminated resource location is received.

In step 765, if the contaminated resource location is not received, the entire data packet of the eMBB UE is retransmitted in the next downlink transmission unit.

In step 770, if the contaminated resource location is received, the contaminated decoding error code block is retransmitted in the next downlink transmission unit, so as to save resources and reduce power consumption and time delay.

FIG. 8A is a flow chart illustrating a process of a base station to set candidate transmission modes according to an embodiment of the invention

In step 810, the base station configures a candidate transmission mode set according to the channel quality statistics information of the URLLC UE, where the candidate transmission mode set includes the following information: the retransmission times, the MCS used for transmission, the redundancy version information of the initial transmission and the retransmission, the subcarrier interval information and the resource positions of the initial transmission and the retransmission, that is, the base station transmits different redundancy versions of the same data packet for many times at different resource positions according to the same MCS.

In step 820, the base station receives the channel quality information reported by the URLLC UE, and may select to update the candidate transmission mode set according to the received information.

In step 830, after the base station and the UE have completed one transmission, the candidate transmission mode set may be selected and updated according to whether the data packet is transmitted correctly.

In step 840, after updating the candidate transmission mode set, the base station issues the updated candidate transmission mode set to each URLLC UE through RRC signaling or broadcast channel.

Fig. 8B shows a processing procedure of URLLC UE on a candidate transmission mode set according to an embodiment of the present invention

In step 850, the URLLC UE receives the updated candidate transmission mode set through the RRC or broadcast channel, and updates the local candidate transmission mode set.

Fig. 9 is a diagram illustrating a UE according to an embodiment of the present invention. The communication device may be used to perform the workflow of fig. 5, 6 and 8B. The following is a brief description of the structure of the communication device, and for specific functions and features, reference is made to the method embodiment, which is not repeated herein. The UE includes: RF front end 910, transceiver 920, processor 930, and memory 940. Wherein

Processor 930 includes a modem processor, a baseband processor, a digital signal processor, a transmit processor, a receiver processor, a transceiver processor associated with transceiver 920, or any combination thereof.

Memory 940 may include any type of computer-readable media usable by computer or processor 930, such as Random Access Memory (RAM), Read Only Memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof.

The transceiver 920 includes a receiver and a transmitter. The receiver may include hardware, firmware, and/or software code executed by a processor to receive data, where the code includes instructions and is stored in a memory (e.g., a computer-readable medium). The receiver may be a radio frequency receiver and the transmitter may be a radio frequency transmitter.

The RF front end 910 may communicate with the transceiver 920 to receive and transmit radio, and further include an antenna, a Low Noise Amplifier (LNA), a switch, a Power Amplifier (PA), and a filter to transmit and receive RF signals.

Fig. 10 is a schematic diagram of a base station according to an embodiment of the present invention, where the communication device may be configured to execute the work flows in fig. 4, fig. 7A, fig. 7B, and fig. 8A, and specific functions and features are referred to in an embodiment of the method, which is not described herein again. The base station includes: an RF front end 1010, a transceiver 1020, a processor 1030, and a memory 1040. The same or similar to corresponding components of the UE900, as described above, but configured or otherwise programmed for base station operation.

The detailed description set forth above in connection with the appended drawings describes some examples, but it is not intended to represent all examples that may be practiced, nor to represent all examples that may fall within the scope of the claims. The word "exemplary" as used herein means "serving as an example, instance, or illustration," but does not mean "preferred" or "advantageous over other examples. The detailed description includes specific details for the purpose of providing a thorough understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The various exemplary blocks and components described in connection with the disclosure herein may be implemented or performed using specially programmed apparatus, for example but not limited to: a Digital Signal Processor (DSP), ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, for performing the functions described herein. The specially programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A specially programmed processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. When implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a non-transitory computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a specifically programmed processor, hardware, firmware, hardware wiring, or any combination thereof. Features used to implement a function may be physically distributed over several locations, including being distributed over different physical locations to implement a portion of a function.

Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Further, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

The previous description is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Furthermore, although elements of the described aspects and/or embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated. Moreover, all or a portion of any aspect and/or embodiment may be utilized with all or a portion of any other aspect and/or embodiment, unless stated otherwise. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of wireless communication, comprising:

the dedicated control information of the URLLC UE indicates the covered eMBB resource of the URLLC UE for the URLLC service, and the dedicated control information of the URLLC UE further includes an index of a candidate transmission mode set, the candidate transmission mode set includes multiple transmission modes, and each transmission mode includes retransmission times of each transmission, a modulation coding scheme, redundancy version information of initial transmission and retransmission, subcarrier spacing information, and resource location information of initial transmission and retransmission.

2. The method of claim 1, further comprising:

URLLC UE is informed of the update of the set of candidate transmission modes.

3. The method of claim 2, wherein

4. The method of claim 1, further comprising retransmitting, at a downstream transmission unit, the eMBB resources occupied by URLLC traffic in an immediately preceding downstream transmission unit.

5. A method of wireless communication, comprising:

the method for receiving the eMBB resource containing the URLLC data by the UE according to the eMBB UE exclusive control information or the URLLC UE exclusive control information comprises the following steps:

the URLLC UE acquires a transmission mode of the URLLC from a candidate transmission mode set according to a candidate transmission mode set index, wherein the candidate transmission mode set comprises a plurality of transmission modes, and each transmission mode comprises retransmission times of each transmission, a modulation coding scheme, redundancy version information of initial transmission and retransmission, subcarrier interval information and resource position information of the initial transmission and the retransmission; and

6. The method of claim 5, wherein the receiving comprises the eMBB UE removing resources occupied by the URLLC traffic according to eMBB UE-specific control information, and feeding back a resource location occupied by the URLLC traffic to the base station.

7. The method of claim 5, further comprising receiving a notification of a base station update to the set of candidate transmission modes, the URLLC UE updating the local set of candidate transmission modes.

8. The method of claim 5, further comprising the eMBB UE receiving the eMBB information occupied in the retransmitted last downlink transmission unit to obtain complete eMBB transmission content.

9. A base station for wireless communication, comprising:

a transceiver;

a memory configured to store a computer program; and

a processor, wherein the transceiver and processor are configured to execute the computer program to implement the steps of the method of any one of claims 1-4.

10. A User Equipment (UE) for wireless communication, comprising:

a transceiver;

a memory configured to store a computer program; and

a processor, wherein the transceiver and processor are configured to execute the computer program to implement the steps of the method of any one of claims 5-8.

11. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4 or 5 to 8.