CN110521271B

CN110521271B - Transmission parameter updating method and device for physical downlink control channel and storage medium

Info

Publication number: CN110521271B
Application number: CN201980001337.5A
Authority: CN
Inventors: 牟勤
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2023-05-30
Anticipated expiration: 2039-07-10
Also published as: WO2021003703A1; CN110521271A

Abstract

The disclosure discloses a transmission parameter updating method of a physical downlink control channel, belonging to the technical field of wireless communication. The method comprises the following steps: in the process of sending uplink data through an unlicensed scheduling mechanism, receiving update indication information sent by a base station through a Physical Downlink Control Channel (PDCCH) through a first transmission parameter; and updating the first transmission parameters used for monitoring the PDCCH sent by the base station into second transmission parameters according to the updating indication information. The scheme realizes the scheme of updating the transmission parameters of the PDCCH without depending on RRC connection, and expands the updating scene of the transmission parameters of the PDCCH.

Description

Transmission parameter updating method and device for physical downlink control channel and storage medium

Technical Field

The disclosure relates to the technical field of wireless communication, and in particular relates to a method, a device and a storage medium for updating transmission parameters of a physical downlink control channel.

Background

In the internet of things scenario, because the data volume of each uplink transmission is smaller, the internet of things device generally has a requirement of unlicensed uplink scheduling.

In the related art, under unlicensed uplink scheduling, a base station configures in advance, for a terminal, some scheduling information used for uplink transmission, such as resource allocation, a transmission mode, and a modulation-demodulation mode. When the terminal wakes up, uplink transmission can be automatically carried out on the pre-configured resources without random access and uplink scheduling permission reception, so that the purposes of reducing signaling overhead and avoiding power waste are achieved.

Disclosure of Invention

The disclosure provides a transmission parameter updating method, a device and a storage medium of a physical downlink control channel. The technical scheme is as follows:

according to a first aspect of embodiments of the present disclosure, there is provided a method for updating transmission parameters of a physical downlink control channel, the method being performed by a terminal, the method including:

in the process of sending uplink data through the unlicensed scheduling mechanism, receiving update indication information sent by a base station through a physical downlink control channel (Physical Downlink Control Channel, PDCCH) through a first transmission parameter;

and updating the first transmission parameters used for monitoring the PDCCH sent by the base station into second transmission parameters according to the updating indication information.

In a possible implementation manner, the receiving, by the first transmission parameter, update indication information sent by the base station through a physical downlink control channel PDCCH includes:

monitoring downlink control information (Downlink Control Information, DCI) sent by the base station through a Physical Downlink Control Channel (PDCCH) through the first transmission parameter, wherein the downlink control information is used for carrying acknowledgement feedback; the confirmation feedback is used for indicating successful receiving of the uplink data;

Extracting the update indication information from the DCI.

In one possible implementation manner, the first transmission parameter includes at least one of initial monitoring time information, monitoring duration information and repeated transmission times of the PDCCH sent by the base station;

the initial monitoring time information is used for indicating the time for starting monitoring the PDCCH; the monitoring duration information is used for indicating duration of continuous monitoring of the PDCCH.

In a possible implementation manner, the update indication information includes the second transmission parameter;

or alternatively, the process may be performed,

the update indication information includes a parameter offset between the first transmission parameter and the second transmission parameter.

In a possible implementation manner, the second transmission parameter is a parameter indicating that the terminal ends monitoring the PDCCH sent by the base station;

or alternatively, the process may be performed,

the second transmission parameter is a parameter indicating the terminal to monitor the PDCCH sent by the base station at least once later.

In a possible implementation manner, the update indication information is used for indicating updated transmission parameters; the sending parameter is a parameter used by the terminal to send uplink data;

The updating, according to the update indication information, the first transmission parameter used for monitoring the PDCCH sent by the base station to a second transmission parameter includes:

obtaining an adjustment strategy of the first transmission parameter according to the transmission parameter before updating and the transmission parameter after updating;

and adjusting the first transmission parameter to the second transmission parameter according to the adjustment strategy of the first transmission parameter.

In a possible implementation manner, the first transmission parameter includes the number of repeated transmissions of the PDCCH sent by the base station, and the sending parameter includes the number of repeated transmissions of the uplink data sent by the terminal;

the obtaining the adjustment policy of the first transmission parameter according to the transmission parameter before updating and the transmission parameter after updating includes:

acquiring the adjustment proportion of the repeated transmission times of the PDCCH sent by the base station according to the proportion of the repeated transmission times of the uplink data sent by the terminal before and after adjustment;

the adjusting the first transmission parameter to the second transmission parameter according to the adjustment policy of the first transmission parameter includes:

and adjusting the repeated transmission times contained in the first transmission parameters according to the adjustment proportion of the repeated transmission times of the PDCCH sent by the base station to obtain the second transmission parameters.

In a possible implementation manner, the adjusting the number of repeated transmissions included in the first transmission parameter according to the adjustment ratio of the number of repeated transmissions of the PDCCH sent by the base station to obtain the second transmission parameter includes:

multiplying the adjustment proportion of the number of repeated transmissions of the PDCCH sent by the base station by the number of repeated transmissions contained in the first transmission parameter to obtain a reference value of the number of repeated transmissions;

and adjusting the repeated transmission times contained in the first transmission parameters according to the repeated transmission times reference value and the PDCCH repeated transmission times supported by the base station to obtain the second transmission parameters.

According to a second aspect of the embodiments of the present disclosure, there is provided a method for updating transmission parameters of a physical downlink control channel, the method being performed by a base station, the method comprising:

in the process of receiving uplink data sent by a terminal through an unlicensed scheduling mechanism, updating indication information is sent to the terminal through a Physical Downlink Control Channel (PDCCH), wherein the updating indication information is used for indicating the terminal to update a first transmission parameter used for monitoring the PDCCH sent by the base station into a second transmission parameter.

In a possible implementation manner, the sending update indication information to the terminal through the physical downlink control channel PDCCH includes:

and Downlink Control Information (DCI) sent through a PDCCH and used for carrying acknowledgement feedback, wherein the acknowledgement feedback is used for indicating successful reception of the uplink data, and the DCI comprises the update indication information.

or alternatively, the process may be performed,

In a possible implementation manner, the update indication information is used for indicating updated transmission parameters; the transmission parameter is a parameter used by the terminal to transmit uplink data.

In a possible implementation manner, the first transmission parameter includes the number of repeated transmissions of the PDCCH sent by the base station, and the sending parameter includes the number of repeated transmissions of the uplink data sent by the terminal.

According to a third aspect of the embodiments of the present disclosure, there is provided a transmission parameter updating apparatus for a physical downlink control channel, where the apparatus is used in a terminal, and the apparatus includes:

the updating indication information receiving module is used for receiving updating indication information sent by the base station through a physical downlink control channel PDCCH through a first transmission parameter in the process of sending uplink data through an unlicensed scheduling mechanism;

and the transmission parameter updating module is used for updating the first transmission parameter used for monitoring the PDCCH sent by the base station into a second transmission parameter according to the updating indication information.

In one possible implementation, the update indication information receiving module is configured to,

monitoring Downlink Control Information (DCI) sent by the base station through a Physical Downlink Control Channel (PDCCH) through the first transmission parameter, wherein the DCI is used for carrying acknowledgement feedback; the confirmation feedback is used for indicating successful receiving of the uplink data;

Extracting the update indication information from the DCI.

or alternatively, the process may be performed,

In a possible implementation manner, the update indication information is used for indicating updated transmission parameters; the sending parameter is a parameter used by the terminal to send uplink data; the transmission parameter updating module is used for updating the transmission parameters,

when the adjustment strategy of the first transmission parameter is obtained according to the transmission parameter before updating and the transmission parameter after updating, the transmission parameter updating module is used for obtaining the adjustment proportion of the repeated transmission times of the PDCCH transmitted by the base station according to the proportion of the repeated transmission times of the uplink data transmitted by the terminal before and after adjustment;

and when the first transmission parameter is adjusted to the second transmission parameter according to the adjustment strategy of the first transmission parameter, the transmission parameter updating module is used for adjusting the repeated transmission times contained in the first transmission parameter according to the adjustment proportion of the repeated transmission times of the PDCCH sent by the base station to obtain the second transmission parameter.

In one possible implementation manner, when the number of repeated transmissions included in the first transmission parameter is adjusted according to the adjustment proportion of the number of repeated transmissions of the PDCCH transmitted by the base station, the transmission parameter updating module is configured to,

According to a fourth aspect of embodiments of the present disclosure, there is provided a transmission parameter updating apparatus for a physical downlink control channel, where the apparatus is used in a base station, and the apparatus includes:

and the updating indication information sending module is used for sending updating indication information to the terminal through a Physical Downlink Control Channel (PDCCH) in the process of receiving uplink data sent by the terminal through the unlicensed scheduling mechanism, wherein the updating indication information is used for indicating the terminal to update a first transmission parameter used for monitoring the PDCCH sent by the base station into a second transmission parameter.

In a possible implementation manner, the update indication information sending module is configured to send downlink control information DCI carrying acknowledgement feedback through a PDCCH, where the acknowledgement feedback is used to indicate successful reception of the uplink data, and the DCI includes the update indication information.

or alternatively, the process may be performed,

According to a fifth aspect of embodiments of the present disclosure, there is provided a transmission parameter updating system of a physical downlink control channel, the system including: a terminal and a base station;

the terminal comprises a transmission parameter updating device of a physical downlink control channel according to a third aspect;

the base station comprises a transmission parameter updating device of the physical downlink control channel according to the fourth aspect.

According to a sixth aspect of the embodiments of the present disclosure, there is provided a transmission parameter updating apparatus for a physical downlink control channel, where the apparatus is used in a terminal, and the apparatus includes:

a processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to:

in the process of sending uplink data through an unlicensed scheduling mechanism, receiving update indication information sent by a base station through a Physical Downlink Control Channel (PDCCH) through a first transmission parameter;

According to a seventh aspect of the embodiments of the present disclosure, there is provided a transmission parameter updating apparatus for a physical downlink control channel, where the apparatus is used in a base station, and the apparatus includes:

a processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to:

According to an eighth aspect of the embodiments of the present disclosure, there is provided a computer readable storage medium, where the computer readable storage medium contains executable instructions, and a processor in a terminal invokes the executable instructions to implement the method for updating transmission parameters of a physical downlink control channel according to the first aspect or any optional implementation manner of the first aspect.

According to a ninth aspect of the embodiments of the present disclosure, there is provided a computer readable storage medium, where the computer readable storage medium contains executable instructions, and a processor in a base station invokes the executable instructions to implement the method for updating transmission parameters of a physical downlink control channel according to the second aspect or any optional implementation manner of the second aspect.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

in the process of uplink data sent by the terminal through the unlicensed scheduling mechanism, the base station can transmit update indication information to the terminal through the PDCCH, so as to indicate the terminal to update the transmission parameters of the monitored PDCCH, thereby realizing a scheme of updating the transmission parameters of the PDCCH without depending on radio resource control (Radio Resource Control, RRC) connection and expanding the update scene of the transmission parameters of the PDCCH.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a wireless communication system, shown in accordance with some demonstrative embodiments;

fig. 2 is a schematic diagram illustrating a PDCCH transmission parameter update procedure according to an exemplary embodiment;

fig. 3 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment;

fig. 4 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment;

fig. 5 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment;

fig. 6 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment;

fig. 7 is a block diagram illustrating a transmission parameter updating apparatus of a PDCCH according to an exemplary embodiment;

fig. 8 is a block diagram illustrating a transmission parameter updating apparatus of a PDCCH according to an exemplary embodiment;

fig. 9 is a schematic diagram illustrating a structure of a transmission parameter updating apparatus of a PDCCH according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

It should be understood that references herein to "a number" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

In recent years, with the vigorous development of the internet of things technology, the internet of things equipment brings great convenience to the life and work of people. Among them, machine-type communication technology (MTC) and narrowband internet of things technology (Narrow Band Internet of Things, NB-IoT) are typical representatives of cellular internet of things technology. Such technologies are widely used in smart cities (e.g., meter reading), smart agriculture (e.g., collection of information such as temperature and humidity), and smart transportation (e.g., sharing bicycles).

Since MTC and terminals in NB-IoT are mostly deployed in areas such as basements where wireless signal propagation is limited, and because of the hardware capability limitations of the terminal devices, their coverage capabilities are inferior to conventional long term evolution (Long Term Evolution, LTE) networks. Thus, repeated transmissions are often employed in MTC and NB-IoT networks to accumulate power, thereby achieving coverage enhancement effects. In short, the repeated transmission is to transmit the same transmission content in a plurality of time units. The time unit may be one subframe or a plurality of subframes.

In addition, power savings for MTC and NB-IoT terminals are a big feature of MTC and NB-IoT because terminals in MTC and NB-IoT are mostly deployed in scenarios where battery charging or replacement is not easy, such as in the field or in basements.

In the scene of the internet of things, the data volume of each transmission is smaller. If the conventional LTE data transmission flow is followed, that is, the random access with the base station, the uplink scheduling grant reception, and the data uploading flow are performed each time data is transmitted, huge signaling overhead will be brought, and the resources occupied by the signaling transmission will be far greater than those occupied by the data transmission. For this scenario, it is therefore proposed in the related art to introduce unlicensed uplink scheduling in MTC as well as NB-IoT scenarios. I.e. the base station pre-configures some scheduling information for uplink transmission of the terminal, such as resource allocation, modulation coding scheme, multi-antenna transmission mode, transmission power, etc. That is, after the terminal wakes up, uplink transmission can be automatically performed on the resources configured in advance according to a preset mode without random access and uplink scheduling permission reception, so that the purposes of reducing signaling overhead and avoiding power waste are achieved.

As described above, in the unlicensed uplink scheduling in the related art, the base station may pre-allocate transmission resources and transmission modes (for example, the transmission modes include a modulation coding mode, a multi-antenna transmission mode, and transmission power) for the terminal in advance, and when the user has data to transmit, the base station directly transmits the data on the pre-allocated resources according to the pre-allocated transmission mode.

In the unlicensed uplink scheduling in the related art, considering that most IoT users' services are periodically reported, such as electricity meters, water meters, etc., reporting service data at intervals, resources configured in the unlicensed uplink scheduling also appear periodically. For example, the base station may configure the time-frequency location of the reserved resource, the size of the resource, the occurrence period, and the format of the user data transmission, for example, the modulation and coding mode, and when the user needs to perform coverage enhancement, the base station may further configure the number of repeated transmissions.

In one scheme provided by the present disclosure, a base station may feed back uplink data sent by a terminal. The feedback of the uplink data may be carried by the PDCCH transmitted by the base station. The base station also performs parameter configuration on the starting time of the terminal for monitoring the PDCCH, the maximum repetition number of the PDCCH, the duration time for monitoring the PDCCH and the like when configuring the transmission parameters in the unlicensed uplink scheduling for the terminal.

However, in the internet of things scenario, the channel condition of the terminal is changed, and meanwhile, the channel information reported by the terminal according to which the base station is based may be inaccurate, so that in some cases, the transmission parameters of the PDCCH need to be reconfigured. In the related art, the update of transmission parameters of the PDCCH by the base station mainly depends on RRC signaling. However, in the scenario of unlicensed uplink scheduling, the user is in the RRC IDLE state, and at this time, the RRC connection is not established, so that the conventional method is not applicable.

The scheme provided by the embodiment of the disclosure can provide a scheme capable of updating the transmission parameters of the PDCCH of the base station in the unlicensed uplink scheduling.

The embodiment of the disclosure provides a transmission parameter updating scheme of a Physical Downlink Control Channel (PDCCH), which can be applied to a wireless communication system to realize that a terminal transmits uplink data to a base station.

Fig. 1 is a schematic diagram of a wireless communication system according to some exemplary embodiments, and as shown in fig. 1, the mobile communication system may include: a number of terminals 110 and a number of base stations 120.

Where terminal 110 may be a device that provides voice and/or data connectivity to a user. Terminal 110 may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), and terminal 110 may be an internet of things terminal such as a sensor device, a mobile phone (or "cellular" phone), and a computer with an internet of things terminal, for example, a fixed, portable, pocket, hand-held, computer-built-in, or vehicle-mounted device. Such as a Station (STA), subscriber unit (subscriber unit), subscriber Station (subscriber Station), mobile Station (mobile), remote Station (remote Station), access point, remote terminal (remote terminal), access terminal (access terminal), user equipment (user terminal), user agent (user agent), user device (user equipment), or User Equipment (UE). Alternatively, terminal 110 may be an unmanned aerial vehicle device.

The base station 120 may be a network-side device in a wireless communication system. Wherein the wireless communication system may be a fourth generation mobile communication technology (the 4th generation mobile communication,4G) system, also known as a long term evolution (Long Term Evolution, LTE) system; alternatively, the wireless communication system may be a 5G system, also known as a New Radio (NR) system. Alternatively, the wireless communication system may be a next generation system of the 5G system.

The base station 120 may be an evolved node b (eNB) employed in a 4G system. Alternatively, the base station 120 may be a base station (gNB) in a 5G system that employs a centralized and distributed architecture. When the base station 120 adopts a centralized and distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DUs). A protocol stack of a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a medium access control (Media Access Control, MAC) layer is provided in the centralized unit; a Physical (PHY) layer protocol stack is provided in the distribution unit, and the specific implementation of the base station 120 is not limited in the embodiments of the present disclosure.

A wireless connection may be established between base station 120 and terminal 110 over a wireless air interface. In various embodiments, the wireless air interface is a fourth generation mobile communication network technology (4G) standard-based wireless air interface; or, the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G-based technology standard of a next generation mobile communication network.

Optionally, the wireless communication system may further include a network management device 130.

Several base stations 120 are respectively connected to a network management device 130. The network management device 130 may be a core network device in a wireless communication system, for example, the network management device 130 may be a mobility management entity (Mobility Management Entity, MME) in an evolved packet core network (Evolved Packet Core, EPC). Alternatively, the network management device may be other core network devices, such as a Serving GateWay (SGW), a public data network GateWay (Public Data Network GateWay, PGW), a policy and charging rules function (Policy and Charging Rules Function, PCRF) or a home subscriber server (Home Subscriber Server, HSS), etc. The embodiment of the present disclosure is not limited to the implementation form of the network management device 130.

In the present disclosure, when the terminal transmits data to the base station, the terminal may repeat transmission of uplink data based on unlicensed uplink scheduling, and in this process, the terminal may determine whether to terminate uplink transmission according to success or failure of uplink data transmission.

For example, please refer to fig. 2, which is a flowchart illustrating a transmission parameter update of a PDCCH according to an exemplary embodiment. As shown in fig. 2, in the unlicensed uplink scheduling scenario, the flow of the transmission parameters of the PDCCH may be as follows:

in step 21, in the process of receiving uplink data sent by the terminal through the unlicensed scheduling mechanism, the base station sends update indication information to the terminal through a physical downlink control channel PDCCH.

The update indication information is used for indicating the terminal to update a first transmission parameter used for monitoring the PDCCH sent by the base station to a second transmission parameter.

In step 22, in the process of sending uplink data through the unlicensed scheduling mechanism, the terminal receives update indication information sent by the base station through the physical downlink control channel PDCCH through the first transmission parameter.

In step 23, the terminal updates the first transmission parameter used for monitoring the PDCCH transmitted by the base station to a second transmission parameter according to the update instruction information.

In the embodiment of the disclosure, in the process of uplink data sent by the terminal through the unlicensed scheduling mechanism, the base station can transmit update indication information to the terminal through the PDCCH, so as to instruct the terminal to update the transmission parameters of the monitored PDCCH, thereby realizing a scheme of updating the transmission parameters of the PDCCH without depending on RRC connection and expanding the update scene of the transmission parameters of the PDCCH.

Fig. 3 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment, which is applied to the wireless communication system shown in fig. 1 and is performed by the terminal 110 in fig. 1, as shown in fig. 3, and may include the following steps.

In step 301, in the process of transmitting uplink data through the unlicensed scheduling mechanism, update indication information transmitted by the base station through the physical downlink control channel PDCCH is received through the first transmission parameter.

In step 302, the first transmission parameter used for monitoring the PDCCH transmitted by the base station is updated to a second transmission parameter according to the update indication information.

In a possible implementation manner, the receiving, by the first transmission parameter, update indication information sent by the base station through the physical downlink control channel PDCCH includes:

Monitoring Downlink Control Information (DCI) sent by the base station through a Physical Downlink Control Channel (PDCCH) through the first transmission parameter, wherein the DCI is used for carrying acknowledgement feedback; the acknowledgement feedback is used for indicating successful reception of the uplink data;

the update indication information is extracted from the DCI.

or alternatively, the process may be performed,

the second transmission parameter is a parameter indicating that the terminal monitors the PDCCH transmitted by the base station at least once later.

In one possible implementation, the update indication information is used to indicate updated transmission parameters; the transmission parameter is a parameter used by the terminal to transmit uplink data;

In one possible implementation manner, the adjusting the number of repeated transmissions included in the first transmission parameter according to the adjustment ratio of the number of repeated transmissions of the PDCCH sent by the base station to obtain the second transmission parameter includes:

multiplying the adjustment ratio of the number of repeated transmissions of the PDCCH sent by the base station by the number of repeated transmissions contained in the first transmission parameter to obtain a reference value of the number of repeated transmissions;

Fig. 4 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment, which is applied to the wireless communication system shown in fig. 1 and is performed by the base station 120 in fig. 1, as shown in fig. 4, and may include the following steps.

In step 401, in the process of receiving uplink data sent by a terminal through an unlicensed scheduling mechanism, update indication information is sent to the terminal through a physical downlink control channel PDCCH, where the update indication information is used to instruct the terminal to update a first transmission parameter used when the terminal monitors the PDCCH sent by the base station to a second transmission parameter.

and the Downlink Control Information (DCI) is sent through the PDCCH and used for carrying acknowledgement feedback, the acknowledgement feedback is used for indicating successful reception of the uplink data, and the DCI comprises the update indication information.

or alternatively, the process may be performed,

In one possible implementation, the update indication information is used to indicate updated transmission parameters; the transmission parameter is a parameter used by the terminal to transmit uplink data.

In one possible implementation manner, the first transmission parameter includes the number of repeated transmissions of the PDCCH sent by the base station, and the sending parameter includes the number of repeated transmissions of the uplink data sent by the terminal.

Fig. 5 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment, which is applied to the wireless communication system shown in fig. 1, as shown in fig. 5, and may include the following steps.

In step 501, in the process of receiving uplink data sent by a terminal through an unlicensed scheduling mechanism, a base station sends update indication information to the terminal through a physical downlink control channel PDCCH.

In one possible implementation manner, when the update indication information is sent to the terminal through the physical downlink control channel PDCCH, the base station may send downlink control information DCI for carrying acknowledgement feedback, where the acknowledgement feedback is used to indicate that the uplink data is successfully received, and the DCI includes the update indication information.

In one possible implementation manner, the base station may configure, in advance, a transmission parameter for the terminal to use when performing uplink transmission based on the unlicensed uplink scheduling mechanism, where the transmission parameter includes a number of times of repeated transmission of uplink data, uplink transmission resources, a modulation coding scheme used for uplink transmission, a multi-antenna transmission mode, and so on.

Optionally, the sending parameter may be configured to the terminal by the base station through RRC signaling when the terminal is in an RRC connected state.

For example, when the terminal is started and accesses the network for the first time, the terminal establishes an RRC connection with the base station, and the base station configures the above transmission parameters for the terminal through the RRC connection, so that the terminal can perform uplink transmission based on the unlicensed uplink scheduling mechanism when the terminal is in an RRC IDLE state (i.e., IDLE state).

For example, the terminal gets the sending parameter configured by the base station and then goes to sleep, and then when a certain wake-up is performed, it is found that the uplink data to be uploaded to the base station is locally stored, and the terminal is in an RRC idle state, at this time, the terminal can start to transmit the uplink data on the resources pre-configured by the base station according to the sending parameter by using an unlicensed uplink scheduling mechanism.

After receiving uplink data transmitted by the terminal through the unlicensed uplink scheduling mechanism, the base station can feed back the uplink data, that is, send acknowledgement feedback (such as ACK feedback) to the terminal through DCI in the PDCCH.

In the embodiment of the present disclosure, when the base station needs to update the transmission parameters of the PDCCH, the update indication information may be carried in the DCI carrying the PDCCH with the acknowledgement feedback.

In step 502, in the process of sending uplink data through the unlicensed scheduling mechanism, the terminal receives update indication information sent by the base station through the physical downlink control channel PDCCH through the first transmission parameter.

In one possible implementation manner, when receiving update indication information sent by a base station through a physical downlink control channel PDCCH through a first transmission parameter, a terminal may monitor downlink control information DCI sent by the base station through the physical downlink control channel PDCCH through the first transmission parameter, where the downlink control information DCI is used to carry acknowledgement feedback; the acknowledgement feedback is used for indicating successful reception of the uplink data; and extracting the update indication information from the DCI.

In the embodiment of the disclosure, when the terminal monitors acknowledgement feedback sent by the base station through the DCI in the PDCCH through the first transmission parameter in the process of sending uplink data through the unlicensed scheduling mechanism, if the DCI carries update prompt information, the terminal also extracts the update prompt information contained in the DCI.

The above time for starting to monitor the PDCCH may be used to indicate an absolute time, that is, after the terminal wakes up, whether uplink data is transmitted or not, at the time point for starting to monitor the PDCCH, the PDCCH transmitted by the base station is monitored.

Alternatively, the above-mentioned time for starting to monitor the PDCCH may also indicate that the base station is inexpensive with respect to the time for starting to perform uplink transmission, that is, indicate that the terminal starts to monitor the PDCCH transmitted by the base station at a preset time after starting uplink transmission. For example, the terminal is instructed to start monitoring the PDCCH sent by the base station at a plurality of OFDM symbols after starting uplink transmission, or the terminal is instructed to start monitoring the PDCCH sent by the base station after performing repeated transmission on uplink data for a plurality of times.

In step 503, the terminal obtains the second transmission parameter carried in the update indication information, or obtains a parameter offset between the first transmission parameter and the second transmission parameter carried in the update indication information.

In an embodiment of the present disclosure, the update indication information includes the second transmission parameter; or, the update indication information includes a parameter offset between the first transmission parameter and the second transmission parameter.

In step 504, the terminal updates the first transmission parameter used for monitoring the PDCCH sent by the base station to the second transmission parameter according to the acquired second transmission parameter or parameter offset.

In the embodiment of the present disclosure, the method for updating the transmission parameters of the terminal side monitoring PDCCH by the base station may include the following two methods:

1) The higher layer defines an alternative parameter set, then the base station indicates one parameter/a group of parameters (namely the second transmission parameters) through the PDCCH, when the subsequent base station transmits the ACK (namely the acknowledgement feedback) to the uplink data sent by the terminal through the PDCCH, the subsequent base station can transmit according to the appointed parameters, and the terminal also carries out relevant monitoring according to the appointed parameters.

2) The higher layer defines a parameter offset set, and then the base station indicates one or a group of offset parameters through the PDCCH, and the base station determines updated transmission parameters (i.e., the second transmission parameters) according to the originally configured parameters (i.e., the first transmission parameters) and the indicated offset parameters. When the subsequent base station transmits the ACK to the uplink data sent by the terminal through the PDCCH, the subsequent base station can transmit according to the determined transmission parameters, and the terminal also carries out relevant monitoring according to the determined transmission parameters.

For example, in the first transmission parameters, the number of times of repeated transmission of PDCCH of uplink data transmission ACK sent by the base station to the terminal is 100, the offset parameters defined by the higher layer include (+10, +20, -10, -20), the offset parameter indicated by the base station through PDCCH is-10, and then the number of times of repeated transmission of PDCCH in the finally determined second transmission parameters is 100-10=90 times.

Similarly, for example, in the first transmission parameter, the duration of continuously monitoring the PDCCH is 100 OFDM symbols, the offset parameter defined by the higher layer includes (+10, +20, -10, -20), the offset parameter indicated by the base station through the PDCCH is-10, and then the duration of continuously monitoring the PDCCH in the second transmission parameter determined finally is 100-10=90 OFDM symbols.

For another example, in the first transmission parameters, the time for starting to monitor the PDCCH is after the terminal performs 50 times of repeated transmission on the uplink data, the offset parameters defined by the higher layer include (+10, +20, -10, -20), and the offset parameter indicated by the base station through the PDCCH is-10, and then the time for starting to monitor the PDCCH in the second transmission parameters determined finally is 50-10=40 OFDM symbols, that is, the time for starting to monitor the PDCCH is after the terminal performs 40 times of repeated transmission on the uplink data.

In a possible implementation manner, the second transmission parameter is a parameter indicating that the terminal ends monitoring the PDCCH sent by the base station; or, the second transmission parameter is a parameter indicating that the terminal monitors the PDCCH transmitted by the base station at least once later.

In the embodiment of the disclosure, the parameter adjustment performed by the PDCCH may be performed for the current transmission or may be performed for all subsequent transmissions.

For example, the base station may terminate the monitoring time of the current PDCCH through the PDCCH. For example, when the base station side does not have subsequent scheduling for the terminal, the base station may also notify the terminal to terminate subsequent PDCCH monitoring while feeding back ACK, and this is the case when the parameter adjustment of the PDCCH is for the current transmission.

For another example, the base station adjusts the number of repeated transmissions of the subsequent PDCCH transmission/transmissions via the PDCCH, and this is the case when the parameter adjustment of the PDCCH is for the subsequent PDCCH transmission/transmissions.

Fig. 6 is a flowchart illustrating a transmission parameter updating method of a PDCCH according to an exemplary embodiment, which is applied to the wireless communication system shown in fig. 1, as shown in fig. 6, and may include the following steps.

In step 601, in the process of receiving uplink data sent by a terminal through an unlicensed scheduling mechanism, a base station sends update indication information to the terminal through a physical downlink control channel PDCCH.

In step 602, in the process of sending uplink data through the unlicensed scheduling mechanism, the terminal receives update indication information sent by the base station through the physical downlink control channel PDCCH through the first transmission parameter.

The execution of the steps 601 and 602 may refer to the descriptions below the steps 501 and 502 in the embodiment shown in fig. 5, which are not described herein.

In step 603, the terminal obtains the adjustment policy of the first transmission parameter according to the transmission parameter before updating and the updated transmission parameter carried in the update indication information.

The transmission parameter is a parameter used by the terminal to transmit uplink data.

The description of the transmission parameters may refer to the description of the transmission parameters in the embodiment shown in fig. 5, which is not repeated here.

The base station may update the transmission parameters used in uplink transmission, that is, the base station indicates the updated transmission parameters through the update indication information, and after receiving the update indication information, the terminal updates the transmission parameters to the updated transmission parameters indicated by the update indication information.

In the embodiment of the present disclosure, the update instruction information is not only used for updating a transmission parameter used when the terminal performs uplink transmission, but also used for updating a transmission parameter of a PDCCH used when the terminal monitors the PDCCH of the base station. That is, the update instruction information updates the transmission parameters of the terminal and the transmission parameters of the PDCCH at the same time.

In step 604, the terminal adjusts the first transmission parameter to the second transmission parameter according to the adjustment policy of the first transmission parameter.

In a possible implementation manner, the first transmission parameter includes the number of repeated transmissions of the PDCCH sent by the base station, and the sending parameter includes the number of repeated transmissions of the uplink data sent by the terminal; when the terminal obtains the adjustment strategy of the first transmission parameter according to the transmission parameter before updating and the transmission parameter after updating, the terminal can obtain the adjustment proportion of the repeated transmission times of the PDCCH transmitted by the base station according to the proportion of the repeated transmission times of the uplink data transmitted by the terminal before and after adjustment.

Correspondingly, when the terminal adjusts the first transmission parameter to the second transmission parameter according to the adjustment policy of the first transmission parameter, the terminal may adjust the number of repeated transmissions included in the first transmission parameter according to the adjustment proportion of the number of repeated transmissions sent by the base station to the PDCCH, so as to obtain the second transmission parameter.

In the embodiment of the disclosure, the transmission parameters of the PDCCH may be linked with the transmission parameters used when the terminal performs uplink data transmission. For example, the data transmission can be linked with the repeated transmission times or transmission power of the data transmission. For example, the number of times of repeated transmission of the PDCCH of the uplink data transmission ACK uploaded by the base station may be scaled equally with the number of times of repeated transmission of the uplink data by the terminal. For example, the scaling equation may be as follows:

wherein, R-data in the above formula is the number of repeated transmissions in the updated transmission parameter, R-data-initial is the number of repeated transmissions in the transmission parameter before updating, R-PDCCH-initial is the number of repeated transmissions in the transmission parameter of the PDCCH before updating, and R-PDCCH is the number of repeated transmissions in the transmission parameter of the PDCCH after updating.

In one possible implementation manner, when the second transmission parameter is obtained by adjusting the number of repeated transmissions included in the first transmission parameter according to the adjustment proportion of the number of repeated transmissions of the PDCCH transmitted by the base station, the terminal multiplies the adjustment proportion of the number of repeated transmissions of the PDCCH transmitted by the base station by the number of repeated transmissions included in the first transmission parameter to obtain a reference value of the number of repeated transmissions; and then, according to the reference value of the repeated transmission times and the repeated transmission times of the PDCCH supported by the base station, the repeated transmission times contained in the first transmission parameter are adjusted to obtain the second transmission parameter.

It should be noted that the value of the R-PDCCH calculated according to the above formula may be the number of retransmissions that are not supported by the standard, and in this case, the R-PDCCH needs to be modified, for example, when the value of the R-PDCCH calculated by the above method is smaller than the minimum value X of the number of retransmissions that can be supported by the base station, the R-PDCCH may be adjusted to a value greater than X. Or when the calculated value of the R-PDCCH is greater than the maximum value Y of the number of repeated transmissions to the PUCCH that can be supported by the base station, the R-PDCCH may be adjusted to a value less than Y.

In the present disclosure, the scheme shown in the embodiment corresponding to fig. 5 and the scheme shown in the embodiment corresponding to fig. 6 may be used alone to update the transmission parameters of the PDCCH. For example, the base station and the terminal may update the starting monitoring time, the duration monitoring time and the repeated transmission times of the PDCCH in the transmission parameters of the PDCCH by directly indicating the terminal through updating the indication information according to the scheme shown in the corresponding embodiment of fig. 5; or, the base station and the terminal independently instruct to adjust the sending parameters of the terminal through updating the instruction information according to the scheme shown in the corresponding embodiment of fig. 6, then combine the adjustment strategy of the sending parameters to obtain the adjustment strategy of the transmission parameters of the PDCCH, and then adjust and update the transmission parameters of the PDCCH.

Alternatively, the solution shown in the embodiment corresponding to fig. 5 and the solution shown in the embodiment corresponding to fig. 6 may be used in combination. For example, according to the scheme shown in the corresponding embodiment of fig. 5, the base station and the terminal directly instruct the terminal to update the starting monitoring time and the duration monitoring time in the transmission parameters of the PDCCH through updating the instruction information; meanwhile, according to the scheme shown in the corresponding embodiment of fig. 6, the base station and the terminal directly instruct to adjust the sending parameters of the terminal through updating the indication information, then combine the adjustment strategy of the sending parameters to obtain the adjustment strategy of the transmission parameters of the PDCCH, and then adjust and update the repeated transmission times in the transmission parameters of the PDCCH.

The following are device embodiments of the present disclosure that may be used to perform method embodiments of the present disclosure. For details not disclosed in the embodiments of the apparatus of the present disclosure, please refer to the embodiments of the method of the present disclosure.

Fig. 7 is a block diagram of a transmission parameter updating apparatus of a PDCCH according to an exemplary embodiment, which may be implemented as all or part of a terminal in the implementation environment shown in fig. 1 by hardware or a combination of hardware and software to perform the steps performed by the terminal in any of the embodiments shown in fig. 2, 3, 5 or 6, as shown in fig. 7. The transmission parameter updating apparatus of the PDCCH may include:

An update indication information receiving module 701, configured to receive, through a first transmission parameter, update indication information sent by a base station through a physical downlink control channel PDCCH in a process of sending uplink data through an unlicensed scheduling mechanism;

and a transmission parameter updating module 702, configured to update the first transmission parameter used when monitoring the PDCCH sent by the base station to a second transmission parameter according to the update indication information.

extracting the update indication information from the DCI.

or alternatively, the process may be performed,

Fig. 8 is a block diagram of a transmission parameter updating apparatus of a PDCCH according to an exemplary embodiment, which may be implemented as all or part of a base station in the implementation environment shown in fig. 1 by hardware or a combination of hardware and software to perform the steps performed by the base station in any of the embodiments shown in fig. 2, 4, 5 or 6, as shown in fig. 8. The transmission parameter updating apparatus of the PDCCH may include:

and the update indication information sending module 801 is configured to send update indication information to the terminal through a physical downlink control channel PDCCH in a process of receiving uplink data sent by the terminal through an unlicensed scheduling mechanism, where the update indication information is used to instruct the terminal to update a first transmission parameter used when the terminal monitors the PDCCH sent by the base station to a second transmission parameter.

or alternatively, the process may be performed,

An exemplary embodiment of the present disclosure further provides a transmission parameter updating system of a PDCCH, the system including: terminal and base station.

The terminal comprises a transmission parameter updating device of the PDCCH provided by the embodiment shown in the figure 7; the base station includes a transmission parameter updating device of the PDCCH provided in the embodiment shown in fig. 8.

It should be noted that, when the apparatus provided in the foregoing embodiment performs the functions thereof, only the division of the respective functional modules is used as an example, in practical application, the foregoing functional allocation may be performed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to perform all or part of the functions described above.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

An exemplary embodiment of the present disclosure provides a transmission parameter updating apparatus for a PDCCH, capable of implementing all or part of the steps performed by a terminal in the embodiments shown in fig. 2, 3, 5, or 6 of the present disclosure, where the transmission parameter updating apparatus for a PDCCH includes: a processor, a memory for storing processor-executable instructions;

Wherein the processor is configured to:

An exemplary embodiment of the present disclosure provides a transmission parameter updating apparatus for a PDCCH, capable of implementing all or part of the steps performed by a base station in the embodiments shown in fig. 2, 4, 5, or 6 of the present disclosure, where the transmission parameter updating apparatus for a PDCCH includes: a processor, a memory for storing processor-executable instructions;

wherein the processor is configured to:

The above description mainly uses the terminal and the base station as examples, and describes the scheme provided by the embodiment of the disclosure. It will be appreciated that the terminal and base station, in order to achieve the above-described functions, comprise corresponding hardware structures and/or software modules that perform the respective functions. The various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of the embodiments of the present disclosure.

Fig. 9 is a schematic structural diagram illustrating a transmission parameter updating apparatus of a PDCCH according to an exemplary embodiment. The apparatus 900 may be implemented as a terminal or a base station in the above-described various embodiments.

The apparatus 900 comprises a communication unit 904 and a processor 902. The processor 902 may also be a controller, represented in fig. 9 as "controller/processor 902". The communication unit 904 is configured to support communication between the terminal and other network devices (e.g., base stations, etc.).

Further, the apparatus 900 may further include a memory 903, where the memory 903 is used to store program codes and data of the terminal 900.

It is to be understood that fig. 9 only shows a simplified design of the device 900. In practical applications, the apparatus 900 may include any number of processors, controllers, memories, communication units, etc., and all terminals or base stations that may implement the embodiments of the present disclosure are within the scope of the embodiments of the present disclosure.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described by the embodiments of the present disclosure may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. 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.

The embodiment of the disclosure also provides a computer storage medium for storing computer software instructions for the terminal or the base station, which contains a program designed for executing the transmission parameter updating method of the physical downlink control channel.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for updating transmission parameters of a physical downlink control channel, the method being performed by a terminal, the method comprising:

In the process of sending uplink data through an unlicensed scheduling mechanism, receiving update indication information sent by a base station through a Physical Downlink Control Channel (PDCCH) through a first transmission parameter, wherein the update indication information is used for indicating updated sending parameters, and the sending parameters are parameters used by the terminal for sending the uplink data; the first transmission parameter includes the number of repeated transmission times of the PDCCH sent by the base station, and the sending parameter includes the number of repeated transmission times of the uplink data sent by the terminal;

and adjusting the repeated transmission times contained in the first transmission parameters according to the adjustment proportion of the repeated transmission times of the PDCCH sent by the base station to obtain second transmission parameters.

2. The method of claim 1, wherein the receiving, by the first transmission parameter, update indication information sent by the base station through the physical downlink control channel PDCCH includes:

Extracting the update indication information from the DCI.

3. The method of claim 1, wherein the first transmission parameters further comprise at least one of start listening time information, listening duration information;

4. The method of claim 1, wherein the adjusting the number of repeated transmissions included in the first transmission parameter according to the adjustment ratio of the number of repeated transmissions of the PDCCH transmitted by the base station to obtain the second transmission parameter includes:

5. A method for updating transmission parameters of a physical downlink control channel, the method being performed by a base station, the method comprising:

In the process of receiving uplink data sent by a terminal through an unlicensed scheduling mechanism, updating indication information is sent to the terminal through a Physical Downlink Control Channel (PDCCH);

the updating indication information is used for indicating updated sending parameters, the sending parameters are parameters used by the terminal for sending uplink data, and the sending parameters comprise repeated transmission times of the terminal for sending the uplink data; the proportion of the number of repeated transmissions of the uplink data sent by the terminal before and after adjustment is used for determining the adjustment proportion of the number of repeated transmissions of the PDCCH sent by the base station, so that the number of repeated transmissions contained in the first transmission parameters adopted for receiving the updating indication information is adjusted according to the adjustment proportion of the number of repeated transmissions of the PDCCH sent by the base station, and a second transmission parameter is obtained.

6. The method of claim 5, wherein the sending update indication information to the terminal through the physical downlink control channel PDCCH comprises:

7. The method of claim 5, wherein the first transmission parameter comprises at least one of start listening time information, listening duration information;

8. A transmission parameter updating apparatus for a physical downlink control channel, wherein the apparatus is used in a terminal, the apparatus comprises:

the system comprises an update indication information receiving module, a Physical Downlink Control Channel (PDCCH), a first transmission parameter and a second transmission parameter, wherein the update indication information receiving module is used for receiving update indication information sent by a base station through the PDCCH in the process of sending uplink data through an unlicensed scheduling mechanism, the update indication information is used for indicating updated sending parameters, and the sending parameters are parameters used by the terminal for sending the uplink data; the first transmission parameter includes the number of repeated transmission times of the PDCCH sent by the base station, and the sending parameter includes the number of repeated transmission times of the uplink data sent by the terminal;

a transmission parameter updating module, configured to obtain an adjustment ratio of the number of repeated transmissions of the PDCCH sent by the base station according to the ratio of the number of repeated transmissions of the uplink data sent by the terminal before and after adjustment; and adjusting the repeated transmission times contained in the first transmission parameters according to the adjustment proportion of the repeated transmission times of the PDCCH sent by the base station to obtain second transmission parameters.

9. The apparatus of claim 8, wherein the update indication information receiving module is configured to,

extracting the update indication information from the DCI.

10. The apparatus of claim 8, wherein the first transmission parameter comprises at least one of start listening time information, listening duration information;

11. The apparatus of claim 8, wherein the transmission parameter update module is configured to, when the number of retransmissions included in the first transmission parameter is adjusted according to the adjustment ratio of the number of retransmissions of the PDCCH transmitted by the base station to obtain the second transmission parameter,

12. A transmission parameter updating apparatus for a physical downlink control channel, wherein the apparatus is used in a base station, and the apparatus comprises:

the updating indication information sending module is used for sending updating indication information to the terminal through a Physical Downlink Control Channel (PDCCH) in the process of receiving uplink data sent by the terminal through an unlicensed scheduling mechanism;

13. The apparatus of claim 12, wherein the device comprises a plurality of sensors,

the update indication information sending module is configured to send downlink control information DCI carrying acknowledgement feedback through a PDCCH, where the acknowledgement feedback is used to indicate successful reception of the uplink data, and the DCI includes the update indication information.

14. The apparatus of claim 12, wherein the first transmission parameter comprises at least one of start listening time information, listening duration information;

15. A transmission parameter updating system for a physical downlink control channel, the system comprising: a terminal and a base station;

the terminal comprises a transmission parameter updating device of a physical downlink control channel according to any one of claims 8 to 11;

the base station comprises transmission parameter updating means for a physical downlink control channel according to any of claims 12 to 14.

16. A transmission parameter updating apparatus for a physical downlink control channel, wherein the apparatus is used in a terminal, the apparatus comprises:

A processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to:

17. A transmission parameter updating apparatus for a physical downlink control channel, wherein the apparatus is used in a base station, and the apparatus comprises:

A processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to:

18. A computer readable storage medium, wherein executable instructions are stored in the computer readable storage medium, and a processor in a terminal invokes the executable instructions to implement the method for updating transmission parameters of a physical downlink control channel according to any one of claims 1 to 4.

19. A computer readable storage medium, wherein executable instructions are stored in the computer readable storage medium, and a processor in a base station invokes the executable instructions to implement the method for updating transmission parameters of a physical downlink control channel according to any one of claims 5 to 7.