CN111464278A - High-reliability low-delay downlink communication method and equipment - Google Patents

High-reliability low-delay downlink communication method and equipment Download PDF

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Publication number
CN111464278A
CN111464278A CN202010171134.5A CN202010171134A CN111464278A CN 111464278 A CN111464278 A CN 111464278A CN 202010171134 A CN202010171134 A CN 202010171134A CN 111464278 A CN111464278 A CN 111464278A
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embb
control information
specific control
transmission mode
information
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CN111464278B (en
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戴曼
任洁
冯雪林
杨小军
石晶林
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Institute of Computing Technology of CAS
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Institute of Computing Technology of CAS
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

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 UR LL C services of high-reliability low-delay communication, the base station covers UR LL C data to be transmitted in a downlink transmission unit which is already scheduled, and eMBB UE exclusive control information and UR LL C UE exclusive control information are set in extra bandwidth, wherein the eMBB UE exclusive control information indicates eMBB resources covered by eMBB UE and used for UR LL C services, and the UR LL C UE exclusive control information indicates eMBB resources covered by UR LL C UE and used for UR LL C services.

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
At present, 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-Reliable low-delay communication (Ultra Reliable and L ow L implementation communication, UR LL C), wherein the requirements of UR LL C traffic on delay and reliability are very sensitive, so that the delay reduction communication technology becomes a research hotspot of future 5G communication.
The subframe length of a 4G-based long Term Evolution technology (L ong Term Evolution, L TE for short) is 1ms, and the main scenes eMBBs and L TE of 5G adopt the same subframe length so as to realize compatibility among different systems and reduce the laying cost of a communication network.
Disclosure of Invention
In order to solve various problems of the existing scheme, the invention provides a new communication method and communication equipment, which improve eMBB quality and shorten UR LL C time delay.
According to a first aspect of the invention, a method of wireless communication is provided. The method comprises the following steps:
when determining that a part of enhanced mobile broadband eMBB resources are used for transmitting UR LL C traffic of high-reliability low-delay communication, the base station covers UR LL C data to be transmitted in a downlink transmission unit which is already scheduled, and sets eMBB UE-specific control information and UR LL C UE-specific control information in extra bandwidth;
wherein the eMBB UE-specific control information indicates eMBB resources covered by the eMBB UE for UR LL C service, and
the UR LL C UE-specific control information indicates that UR LL C UEs are overlaid with eMBB resources for UR LL C traffic.
In one embodiment of the invention, UR LL C UE-specific control information also includes 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 UR LL C UE;
UR LL C informs the UE 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 one embodiment of the present invention, the method further includes retransmitting the eMB resource occupied by the UR LL C service in the previous downlink transmission unit in the 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-specific control information or UR LL C UE-specific control information exists in the extra bandwidth;
the UE receives the eMBB resource containing UR LL C data according to either the eMBB UE-specific control information or UR LL C UE-specific control information.
In an embodiment of the present invention, the receiving includes the eMBB UE removing the resource occupied by the UR LL C service according to the eMBB UE-specific control information, and feeding back the resource position occupied by the UR LL C service to the base station.
In one embodiment of the invention, the receiving comprises:
UR LL C UE obtains candidate transmission mode set index according to UR LL C UE exclusive control information;
the UR LL C UE obtaining the transmission mode of UR LL C from the candidate transmission mode set according to the candidate transmission mode set index, and
and the UR LL C UE receives the data packets transmitted for multiple times at the corresponding resource position according to the transmission mode, and performs combined demodulation to acquire UR LL C information.
In one embodiment of the invention, also including receiving notification of the update of the candidate transmission mode set by the base station, UR LL C UE updates 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 method has the advantages that the extra bandwidth is utilized to provide the eMB UE exclusive control information and the UR LL C UE exclusive control information, the occupation of eMB data resources can be reduced by utilizing the extra bandwidth, particularly under the condition that the UR LL CUE number is large and the UR LL C UE control information is also large, if the extra bandwidth is not used, the occupation of the eMB data resources is large, the UR LL C UE exclusive control information uses a candidate transmission mode set index to replace specific transmission parameters, multiple times of UR LL C downlink transmission is indicated by transmitting the exclusive control information once, the resource overhead can be saved, and the processing time delay of the UR LL C is reduced.
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 process of receiving subframes by a UR LL C UE according to an embodiment of the present invention.
Fig. 7A is a flow diagram of a process of base station to UR LL C UE feedback according to one embodiment of the 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" may often be used interchangeably the CDMA system may implement wireless technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95 and IS-856 standards IS-2000 release 0 and A IS 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), etc. UTRA includes wideband (CDMA) and other variants of CDMA.TDMA systems may implement wireless technologies such as Global System for Mobile communications (GSM). OFDMA may implement wireless technologies such as Ultra Mobile Broadband (UMB), OFDMA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16 (IEEE), 802.20, Flash-UTRT, etc. wireless technologies such as UMTS-2, WO-7, UMTS-120, UMTS-W-T-TM, etc. the wireless technologies may be used in a cellular systems such as UMTS-W.
Fig. 1 shows a schematic diagram of an existing communication system, which includes one or more base stations, and the base stations can simultaneously provide services for multiple UEs, where eMBB UEs have large traffic, large number, low requirement on delay, UR LL C UEs have small traffic and are bursty.
A base station may support different systems of communication protocols or may support different communication modes.A base station may use various communication technologies, such as 5G (New radio or "NR"), fourth generation (4G)/L TE, 3G, Wi-Fi, Bluetooth, and future evolution public land Mobile network (P L MN), and the different communication technologies may overlap in the same area.
An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (W LL) station, a Personal Digital Assistant (PDA), a handheld device having 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, or a terminal device in a future evolved public land mobile network (P L MN), etc.
The present inventors have studied to find that, due to the short duration and burstiness characteristics of UR LL C traffic, a base station may use ongoing eMBB subframes for transmitting UR LL C traffic and allocate time and frequency resources for UR LL C traffic when it is desired to send UR LL C traffic during ongoing eMBB subframes, the base station releases some resources already allocated to eMBB traffic in order to accommodate UR LL C transmissions, for example, eMBB UE-specific control information indicating which resources eMBB UEs are released for UR 7C traffic and UR LL C UE-specific control information indicating control information of UR LL C resources among these released resources may be provided in an extra bandwidth, utilizing the part of the bandwidth that the base station and UEs may support and may also be used, i.e. the extra bandwidth.
Using the data resources already allocated to the eMBB traffic for transmitting UR LL C traffic is also referred to as eMBB "contaminated".
The usage of the extra bandwidth can reduce the occupation of eBB data resources, especially under the condition that the UR LL C UE number is large, and the UR LL C UE control information is also large, if the extra bandwidth is not used, the eBB data resources are occupied more.
UR LL C UE exclusive control information uses candidate transmission mode set index indication, the candidate transmission mode set is configured by the base station according to UR LL C UE channel quality statistical information, 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 whether to update the candidate transmission mode set according to whether the data packet is correctly transmitted or not, after the UE reports the channel quality information or after each transmission is finished, the base station can select whether to update the candidate transmission mode set or not, and the set is updated only when necessary.
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 UR LL C UE dedicated control information uses the candidate transmission mode set index instead of the specific transmission parameter, and indicates multiple UR LL C downlink transmissions by transmitting the dedicated control information once, which can save the resource overhead and reduce the processing delay of the UR LL C UE.
After the eMB UE knows that the resource is occupied by UR LL C from the eMB UE exclusive control information, the eMB UE returns NACK and the occupied resource, namely the position of the polluted resource, and the base station receives the eMB UE feedback NACK and the position of the polluted resource, and then retransmits the polluted decoding error code block in the previous downlink transmission unit in the next downlink transmission unit without transmitting a complete eMB data packet, so that the resource is saved, the power consumption and the time delay are reduced, the integrity of eMB service data transmission is ensured, and the interference to the eMB service is avoided.
Fig. 2 shows an example of UR LL C UE multiplexing eMBB UEs in the same subframe, when there is no UR LL C UE data transmission requirement, the first 3 symbols of the subframe are used for eMBB control information of eMBB UE data to indicate the transmission of the last 11 symbols of eMBB data, where the eMBB control information includes resource location indication, MCS, initial transmission/retransmission indication, redundancy version indication and HARQ process number, since UR LL C UE traffic has burstiness, there may be urgent transmission of UR LL C UE data after the downlink transmission unit has completed scheduling, when the base station overlays UR LL C UE data on the last 11 symbols in the downlink transmission unit that has completed scheduling, to preferentially guarantee latency and reliability requirements of UR LL C UE traffic, in the example of fig. 2, the 7 th, 8 th, 11 th, 12 th symbols are used for UR LL C transmission.
According to an embodiment of the invention, a base station sends eMB UE-specific control information and UR LL C UE-specific control information through occupying a protection bandwidth, the eMB UE removes UR LL C data information from the last 11 symbols according to the eMB UE-specific control information, and the UR LL C UE obtains UR LL C data information from the last 11 symbols according to the UR LL C UE-specific control information.
Fig. 3 shows an example of carrying eMBB UE-specific control information and UR LL C UE-specific control information in the guard bandwidth, where the guard bandwidth resource corresponding to the 1 st, 2 nd, 3 th symbols is transmitted for eMBB UE-specific control information, the guard bandwidth resource corresponding to the 4 th, 5 th, 6 th, 7 th, 8 th, 9 th, 10 th symbols is transmitted for UR LL C UE-specific control information, in this example there are two UR LL C UEs, where the 4 th, 5 th, 6 th symbols are used for UR LL C UE1, the 7 th, 8 th, 9 th, 10 th symbols are used for UR LL C UE2, the 11 th, 12 th, 13 th, 14 th symbols are not used.
In step 430, when there is UR LL C UE data to be transmitted in the base station, the base station allocates eMBB UE-specific control information and UR LL C UE-specific control information within the protection bandwidth of the current downlink transmission unit, the eMBB UE-specific control information includes resource location indication of UR LL C UE, wherein the UR LL C UE-specific control information includes UR LL C UE candidate transmission mode set index.
In step 440, eMBB UE specific control information is scrambled using the C-RNTI of the eMBB UE UR LL C UE specific control information is scrambled using the C-RNTI of the UR LL C UE.
In step 450, after the time domain position where the UR LL C UE-specific control information appears, data information corresponding to UR LL C UE is allocated, and UR LL C data is overlaid on the symbols occupied by the scheduled downlink transmission unit eMBB data.
After the base station transmits the subframe, the eMBB UE and the UR LL C UE respectively receive the subframe.
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 knows the resource location information covered by the UR LL C UE data after completing receiving the eMBB UE specific 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 being preempted by the UR LL C, and after removing the resource occupied by the UR LL C UE, the eMBB UE can receive information at the correct resource location with a given MCS, thereby avoiding the transmission quality from being reduced by the polluted information.
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 assumed that there is no pollution caused by data transmission of UR LL C UE, and the eMBB UE receives 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 process of receiving subframes by UR LL C UE according to one embodiment of the present invention.
In step 610, it is first detected whether there is UR LL C UE-specific control information in the guard bandwidth.
In step 620, if there is UR LL C UE specific control information, UR LL C UE receives UR LL C UE specific control information, descrambles the specific control information with its own C-RNTI to obtain candidate transmission mode set index.
In step 625, the UR LL C UE can obtain the information of the number of transmissions, the transmission position, the MCS, the redundancy version, etc. of the data packet transmitted this time according to the indication of the candidate transmission mode configuration set index.
In step 630, UR LL C 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 UR LL C UE-specific control information in the guard bandwidth, it is determined that there is no UR LL C information in the subframe, and the subframe does not need to be processed.
Fig. 7A shows a process flow of base station feedback to UR LL C UE according to one embodiment of the present invention.
In step 710, it is determined whether the feedback content is ACK or NACK, when the UR LL C feedback is received.
In step 715, if ACK is checked, the transmission to UR LL C UE is completed.
In step 720, the channel state information and the set of candidate transmission modes for UR LL C UEs are updated.
In step 725, the set of candidate transmission modes for UR LL C UEs is updated if UR LL C UE feedback NACK is received.
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 UR LL C message is within the allowable range of the time delay, the message is retransmitted, and the process 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 polluted resource location is not received, the entire data packet of the embube 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 UR LL C UE, where the candidate transmission mode set includes information of retransmission times, MCS used for transmission, redundancy version information of initial transmission and retransmission, subcarrier spacing information, and resource locations of initial transmission and retransmission, that is, the base station transmits different redundancy versions of the same data packet multiple times at different resource locations according to the same MCS.
In step 820, the base station receives the channel quality information reported by the UR LL C 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 sends the updated candidate transmission mode set to each UR LL C UE through RRC signaling or broadcast channel.
FIG. 8B illustrates the handling of the set of candidate transmission modes by the UR LL C UE in accordance with one embodiment of the present invention
In step 850, the UR LL C UE receives the updated candidate transmission mode set via 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 may further include an antenna, a low noise amplifier (L NA), 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.
By way of example, and not limitation, computer-readable media may 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.
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 (14)

1. A method of wireless communication, comprising:
when determining that a part of enhanced mobile broadband eMBB resources are used for transmitting UR LL C traffic of high-reliability low-delay communication, the base station covers UR LL C data to be transmitted in a downlink transmission unit which is already scheduled, and sets eMBB UE-specific control information and UR LL C UE-specific control information in extra bandwidth;
wherein the eMBB UE-specific control information indicates eMBB resources covered by the eMBB UE for UR LL C service, and
the UR LL C UE-specific control information indicates that UR LL C UEs are overlaid with eMBB resources for UR LL C traffic.
2. The method of claim 1 wherein UR LL C UE-specific control information further includes an index of a set of candidate transmission modes.
3. The method of claim 2, wherein the set of candidate transmission modes comprises a plurality of transmission modes, each transmission mode comprising a number of retransmissions per transmission, a Modulation and Coding Scheme (MCS), redundancy version information, subcarrier spacing information, and resource location information per transmission.
4. The method of claim 1, further comprising:
configuring a candidate transmission mode set according to channel statistical information of UR LL C UE;
UR LL C informs the UE of the update of the set of candidate transmission modes.
5. The method of claim 4, 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.
6. The method of claim 1, further comprising retransmitting, in a downstream transmission unit, the eMBB resources occupied by UR LL C traffic in an immediately preceding downstream transmission unit.
7. A method of wireless communication, comprising:
the UE determines that eMBB UE-specific control information or UR LL C UE-specific control information exists in the extra bandwidth;
the UE receives the eMBB resource containing UR LL C data according to either the eMBB UE-specific control information or UR LL C UE-specific control information.
8. The method of claim 7, wherein the receiving comprises the eMBB UE removing resources occupied by UR LL C traffic according to eMBB UE-specific control information and feeding back to a base station the resource location occupied by UR LL C traffic.
9. The method of claim 7, wherein the receiving comprises:
UR LL C UE obtains candidate transmission mode set index according to UR LL C UE exclusive control information;
the UR LL C UE obtaining the transmission mode of UR LL C from the candidate transmission mode set according to the candidate transmission mode set index, and
and the UR LL C UE receives the data packets transmitted for multiple times at the corresponding resource position according to the transmission mode, and performs combined demodulation to acquire UR LL C information.
10. The method of claim 7, further comprising receiving a notification of a base station update to the set of candidate transmission modes, UR LL C UE updating the local set of candidate transmission modes.
11. The method of claim 7, further comprising the eMBB UE receiving the eMBB information occupied in the retransmitted last downlink transmission unit to obtain complete eMBB transmission content.
12. 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 1-6.
13. 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 of claims 7-11.
14. 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 1-6 or 7-11.
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