CN111865540A - Method performed by user equipment and user equipment - Google Patents

Abstract

The present invention provides a method performed by a user equipment UE, comprising: receiving configuration information from a base station for configuring a power saving channel for the user equipment UE, the power saving channel is based on a physical downlink control channel PDCCH; according to the received the configuration information determines whether the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UEs; and if the power saving channel is a PDCCH common to a group of UEs, determining the user according to the received configuration information The starting position of the information field of the equipment UE in the downlink control information DCI of the power saving channel and the number of bits occupied by the information field in the downlink control information DCI of the power saving channel.

Description

Method performed by user equipment and user equipment

technical field

The present application relates to the field of wireless communication technologies, and more particularly, to a method performed by a user equipment and a user equipment.

Background technique

In March 2019, at the 3rd Generation Partnership Project (3GPP) RAN#83 Plenary Session, a new work item on User Equipment (UE) power saving (see RP-190727: New WID: UE Power Saving in NR) was approved. One of the goals of the above research projects is to introduce a physical downlink control channel (PDCCH)-based power-saving signal or channel to the UE in the radio resource control connection state (RRC_CONNECTED: Radio Resource Control_CONNECTED) to reduce the energy consumption of the UE. .

The present disclosure mainly solves the problems of configuration and implementation of power-saving signals or channels based on PDCCH.

SUMMARY OF THE INVENTION

In order to solve at least a part of the above problems, the present invention provides a method and user equipment executed by user equipment UE, which are used to solve the problems of configuration and implementation of power saving signals or channels based on PDCCH.

According to an aspect of the present invention, there is provided a method performed by a user equipment UE, comprising: receiving configuration information from a base station for configuring a power saving channel for the user equipment UE, the power saving channel is based on a physical downlink control channel PDCCH; according to The received configuration information determines whether the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UEs; and if the power saving channel is a PDCCH common to a group of UEs, according to the received The configuration information determines the starting position of the information field of the user equipment UE in the downlink control information DCI of the power saving channel and the number of bits occupied by the information field in the downlink control information DCI of the power saving channel.

In the above method performed by the user equipment UE, preferably, if the configuration information contains a power-saving wireless network temporary identifier ps-RNTI, the ps-RNTI is used to scramble the cyclic redundancy check of the power-saving channel. Check CRC.

In the above method performed by the user equipment UE, preferably, according to whether the configuration information contains the power-saving wireless network temporary identifier ps-RNTI, it is determined whether the power-saving channel is a PDCCH common to a group of UEs, or whether the power-saving channel is a PDCCH common to a group of UEs. UE-specific PDCCH, if the configuration information contains the power-saving radio network temporary identifier ps-RNTI, the power-saving channel is a group of UE-common PDCCHs, if the configuration information does not contain the power-saving radio network If ps-RNTI is temporarily identified, the power saving channel is a UE-specific PDCCH.

In the above method performed by a user equipment UE, preferably, the power saving channel is determined according to the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel Is it a PDCCH common to a group of UEs or a UE-specific PDCCH, if the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is less than or equal to a fixed value, then The power saving channel is a PDCCH common to a group of UEs. If the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is greater than or equal to or greater than the fixed value, Then the power saving channel is a UE-specific PDCCH.

In the above method performed by a user equipment UE, preferably, if the power saving channel is a PDCCH common to a group of UEs, the configuration information includes the information field for indicating that the user equipment UE is in The power saving index number ps-Index of the starting position in the downlink control information DCI of the power saving channel.

In the above method performed by a user equipment UE, preferably, assuming that the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is N bits, the The positions of the bits occupied by the information field of the user equipment UE in the DCI of the power saving channel are ps-Index, ps-Index+1, ..., ps-Index+(N-1), where N is a positive integer.

In the above method performed by the user equipment UE, preferably, assuming that the DCI payload of the power saving channel is M bits, if ps-Index+(N-1)>M-1, then the user The configuration information of the device UE configuring the power saving channel is invalid, wherein M is a positive integer.

According to another aspect of the present invention, there is provided a user equipment, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, execute any one of claims 1 to 7 method described in item.

According to the method and the user equipment performed by the user equipment UE involved in the present invention, problems such as the configuration and implementation of the power-saving signal or channel based on the PDCCH can be solved.

Description of drawings

The above and other features of the present application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a flowchart of a method performed by a user equipment UE according to an embodiment of the present application.

FIG. 2 shows a block diagram of a base station 100 according to an embodiment of the present application.

FIG. 3 shows a block diagram of a user equipment 200 according to an embodiment of the present application.

FIG. 4 shows a schematic diagram of a DRX cycle involved in an embodiment of the present application.

FIG. 5 shows a schematic diagram of UE multiplexing according to Embodiment 2 of the present application.

FIG. 6 shows a schematic diagram of UE multiplexing according to Embodiment 3 of the present application.

Detailed ways

The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present application should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present application are omitted to prevent confusion in understanding of the present application.

FIG. 1 shows a flowchart of a method performed by a user equipment UE according to an embodiment of the present application.

In step S101, configuration information for configuring a power saving channel for a user equipment UE is received from a base station, where the power saving channel is based on a physical downlink control channel PDCCH.

In step S102, it is determined according to the received configuration information whether the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UEs.

In step S103, if the power saving channel is a PDCCH common to a group of UEs, determine whether the information field of the user equipment UE is in the downlink control information DCI of the power saving channel according to the received configuration information. The starting position and the number of bits occupied by the information field in the downlink control information DCI of the power saving channel.

FIG. 2 shows a block diagram of a base station 100 according to an embodiment of the present application. As shown in the figure, the base station 100 includes a configuration unit 110 and a transmission unit 120 . Those skilled in the art should understand that the base station 100 may also include other functional units necessary to realize its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units and other physical downlink channel transmission processing units and so on. However, for brevity, detailed descriptions of these well-known elements are omitted.

The configuration unit 110 configures the user equipment with a power-saving signal or channel. The sending unit 120 sends the above configuration information to the UE by using a physical downlink control channel and/or a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH).

FIG. 3 shows a block diagram of a user equipment UE 200 according to an embodiment of the present application. As shown in the figure, the UE 200 includes an extraction unit 210 and a reception unit 220 . Those skilled in the art should understand that the UE 200 may also include other functional units necessary to realize its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units and other physical uplink channel transmission processing units and so on. However, for brevity, detailed descriptions of these well-known elements are omitted.

The extraction unit 210 is for the UE to extract the configuration information about the power-saving signal or channel sent by the base station from the received physical layer signaling and/or MAC signaling and/or RRC signaling and/or system information. The receiving unit 220 receives the configuration information sent by the base station through the physical downlink control channel and/or the physical downlink shared channel.

The base station described in the present invention is an entity used to communicate with user equipment, and may also refer to a Node B or an evolved Node B (Evolved Node B, eNB) or a gNB (Next generation NodeB) or an Access Point (Access Point, AP) ).

The user equipment described in the present invention may also refer to a terminal or an access terminal or a station or a mobile station. The user equipment may be a cellular phone or a PDA (Personal Digital Assistant, PDA) or a cordless phone or a notebook computer or a mobile phone or a smart phone or a handheld device or a netbook or the like.

The physical downlink control channel in the present invention may refer to PDCCH in 3GPP LTE/LTE-A (Long Term Evolution/Long Term Evolution-Advanced) or 5G NR (New Radio) or MPDCCH (MTC PDCCH) for machine type communication Or NPDCCH for narrowband IoT communication, etc. The physical downlink shared channel may refer to 3GPP LTE/LTE-A (Long Term Evolution/Long Term Evolution-Advanced) or PDSCH in 5G NR, or NPDSCH used for narrowband IoT communication.

Combinations of work between different embodiments are also possible.

Introduction to discontinuous reception DRX

Packet-based data flow is usually bursty, with data transmission for a period of time, but no data transmission for a longer period of time afterward. When there is no data transmission, the power consumption can be reduced by stopping the reception of the PDCCH (the blind detection of the PDCCH will be stopped at this time), thereby improving the battery life.

The basic mechanism of DRX is to configure a DRX cycle for the UE in the RRC_CONNECTED state. As shown in Figure 4, the DRX cycle consists of "On Duration" and "Opportunity for DRX". During the "On Duration" time, the UE monitors and receives the PDCCH (active period); during the "Opportunity for DRX" time, the UE does not receive the PDCCH to reduce power consumption (sleep period).

Hereinafter, specific examples, embodiments, and the like related to the present disclosure will be described in detail. In addition, as mentioned above, the example, the Example, etc. which are described in this disclosure are illustrative descriptions for easy understanding of this invention, and do not limit this invention.

Example 1

In Embodiment 1, as an example, the configuration and confirmation mechanism of the power saving channel are described.

The process of realizing power saving based on the power saving channel of the physical downlink control channel mainly refers to that the base station instructs the UE to adjust the related parameters to reduce energy consumption. The physical downlink control channel used for power saving may be a UE-specific (UE-specific) physical downlink control channel, or may be a group common (group common) physical downlink control channel. The UE-specific physical downlink control channel means that the physical channel is only used for a specific UE, and the downlink control information carried by it only contains the information of the user. The cyclic redundancy check (Cyclic Redundancy Check) of the physical downlink control channel Check, CRC) can be scrambled with the UE's Cell-RadioNetwork Temporary Identifier (C-RNTI), or can be scrambled with a certain wireless network temporary identifier configured for the physical downlink control channel used for power saving. Scrambling, UE-specific power saving (Power Saving, PS) physical downlink control channel is also called UE-specific PS-PDCCH, or UE-specific PS DCI, or UE-specific DCI, etc. The power-saving physical downlink control channel common to a group of UEs can be used for more than one UE or multiple UEs, and the downlink control information carried by the physical downlink control channel includes the control information of one or more than one UE. The cyclic redundancy calibration of the physical downlink control channel Cyclic Redundancy Check (CRC) is scrambled with the wireless network temporary identifier or the power-saving wireless network temporary identifier configured for the physical downlink control channel used for power saving. The power-saving physical downlink control channel common to a group of UEs is also called group common Power-saving physical downlink control channel Group Common PS-PDCCH, or Group Common PS-DCI, or Group Common DCI, etc.

The power saving channel based on the physical downlink control channel can be considered together with the connected discontinuous reception (Connected-Discontinuous Reception, C-DRX), or can be considered separately. When considered together with C-DRX, the power saving channel based on the physical downlink control channel is before the "on duration" of the C-DRX cycle, and there is a time offset between the start time position of the "on duration" of the C-DRX cycle quantity. For the UE, the power saving channel based on the physical downlink control channel can play a wake-up role, that is, when the UE detects the power saving channel based on the physical downlink control channel, the UE will monitor and receive the PDCCH and/or PDCCH for scheduling. Reference signaling and/or other physical channels and/or other signaling, and when the UE does not detect the power saving channel based on the physical downlink control channel, the UE will not monitor the PDCCH and/or reference signal for scheduling. and/or other physical channels and/or other signaling. When considered separately, the power-saving channel based on the physical downlink control channel will not be restricted by C-DRX, that is to say, whether C-DRX is configured does not affect the work of the power-saving PDCCH. The DCI of the power-saving physical downlink control channel may contain various control information to activate various power-saving mechanisms or technologies. For example, the DCI of the power-saving physical downlink control channel may contain one or more of the following control information: wake-up indication, sleep-entry indication, inter-slot scheduling indication, start reference signaling transmission indication, start channel quality indication CQI reporting, Single-cell/multi-cell operation instructions, etc. The following is an example of a power saving PDCCH configuration (PS-PDCCH-Config).

PS-PDCCH-Config information element

The PS-PDCCH-Config configuration contains parameters ps-RNTI, ps-Index, ps-DCI-field, etc. The ps-RNTI is a power-saving wireless network temporary identifier configured for the power-saving PDCCH, and is used to scramble the CRC of the power-saving PDCCH. The parameter ps-RNTI is optional, that is to say, the parameter ps-RNTI can be configured or not configured. The ps-Index is a power saving index number, which is used to indicate the starting bit position of the UE's information field in the DCI of the group common PDCCH or the index number of the UE ordering of the UE's information field in the DCI of the group common PDCCH. The ps-DCI-field is the information field of the UE in the DCI of the group common PDCCH, and is used to configure various power saving mechanisms or technologies of the UE. The size of the field is configurable or determined by the configured various power saving mechanisms or The amount of technology and/or its corresponding various power saving mechanisms or the number of bits required for the technology indication. The information field refers to a continuously distributed bit region of the UE in the DCI of the group common PDCCH. The ps-DCI-field in the example contains parameters Wakeup, Go-to-sleep, Cross-slot scheduling, etc. Among them, the parameter Wakeup is the wakeup indication, the parameter Go-to-sleep is the sleep indication, and the Cross-slot scheduling is the cross-slot scheduling indication. The parameters Wakeup, Go-to-sleep, and Cross-slot scheduling configured in the ps-DCI-field in the example indicate the bit length of the parameter, and the bit information content of the information field is indicated by the DCI of the PS-PDCCH.

The configuration method of PS-PDCCH-Config may be physical layer signaling and/or Media Access Control (MAC: Media Access Control) signaling and/or UE-specific Radio Resource Control (RRC: Radio Resource Control) signaling and/or The public RRC signaling and/or system information (SI: System Information) may also be any combination of the above-mentioned multiple configuration modes.

For the UE, whether the power-saving physical downlink control channel is the UE-specific PS PDCCH or the Group Common PS-PDCCH can be determined by the configuration of the ps-RNTI. If ps-RNTI is configured, Group Common PS-PDCCH or Group Common DCI is used, and the CRC of PS-PDCCH is scrambled by the configured ps-RNTI; if ps-RNTI is not configured, UE-specific PS PDCCH or UE- specific DCI, the CRC of the PS-PDCCH is scrambled by the UE's C-RNTI.

Alternatively, whether the power-saving physical downlink control channel is UE-specific PS PDCCH or Group Common PS-PDCCH can be determined by the size of the configured ps-DCI-field, that is, by the number of bits occupied by the ps-DCI-field. Decide. If the number of bits in the ps-DCI-field is less than (or less than or equal to) P, the Group Common PS-PDCCH or Group Common DCI is used, and the CRC of the PS-PDCCH is scrambled by the configured ps-RNTI; if the ps-DCI-field If the number of bits is greater than or equal to (or greater than) P, the UE-specific PS PDCCH or UE-specific DCI is used. At this time, if the ps-RNTI is configured, the CRC of the PS-PDCCH is scrambled by the configured ps-RNTI. If no ps-RNTI is configured, the CRC of the PS-PDCCH is scrambled by the UE's C-RNTI. The P value may be pre-defined, or may be determined by Media Access Control (MAC: Media Access Control) signaling and/or UE-specific Radio Resource Control (RRC: Radio Resource Control) signaling and/or common RRC signaling and / or System Information (SI: System Information) configuration.

Alternatively, the UE does not distinguish or judge whether the PS-PDCCH is a UE-specific PS PDCCH or a GroupCommon PS-PDCCH, but selects the CRC-scrambled wireless network temporary identifier of the PS-PDCCH according to whether the ps-RNTI is configured ( RNTI). If the ps-RNTI is configured, the CRC of the PS-PDCCH is scrambled by the configured ps-RNTI, and if the ps-RNTI is not configured, the CRC of the PS-PDCCH is scrambled by the C-RNTI of the UE.

Example 2

In Embodiment 2, as an example, the case where UEs with the same information field size are multiplexed in the same Group Common DCI will be described.

The process of realizing power saving based on the power saving channel of the physical downlink control channel mainly refers to that the base station instructs the UE to adjust the related parameters to reduce energy consumption. The physical downlink control channel used for power saving may be a UE-specific (UE-specific) physical downlink control channel, or may be a group common (group common) physical downlink control channel. The UE-specific physical downlink control channel means that the physical channel is only used for a specific UE, and the downlink control information carried by it only contains the information of the user. The cyclic redundancy check (Cyclic Redundancy Check) of the physical downlink control channel Check, CRC) can be scrambled with the UE's Cell-RadioNetwork Temporary Identifier (C-RNTI), or can be scrambled with a certain wireless network temporary identifier configured for the physical downlink control channel used for power saving. Scrambling, UE-specific power saving (Power Saving, PS) physical downlink control channel is also called UE-specific PS-PDCCH, or UE-specific PS DCI, or UE-specific DCI, etc. The power-saving physical downlink control channel common to a group of UEs can be used for more than one UE or multiple UEs, and the downlink control information carried by the physical downlink control channel includes the control information of one or more than one UE. The cyclic redundancy calibration of the physical downlink control channel Cyclic Redundancy Check (CRC) is scrambled with the wireless network temporary identifier or the power-saving wireless network temporary identifier configured for the physical downlink control channel used for power saving. The power-saving physical downlink control channel common to a group of UEs is also called group common Power-saving physical downlink control channel Group Common PS-PDCCH, or Group Common PS-DCI, or Group Common DCI, etc.

The power saving channel based on the physical downlink control channel can be considered together with the connected discontinuous reception (Connected-Discontinuous Reception, C-DRX), or can be considered separately. When considered together with C-DRX, the power saving channel based on the physical downlink control channel is before the "on duration" of the C-DRX cycle, and there is a time offset between the start time position of the "on duration" of the C-DRX cycle quantity. For the UE, the power saving channel based on the physical downlink control channel can play a wake-up role, that is, when the UE detects the power saving channel based on the physical downlink control channel, the UE will monitor and receive the PDCCH and/or PDCCH for scheduling. Reference signaling and/or other physical channels and/or other signaling, and when the UE does not detect the power saving channel based on the physical downlink control channel, the UE will not monitor the PDCCH and/or reference signal for scheduling. and/or other physical channels and/or other signaling. When considered separately, the power-saving channel based on the physical downlink control channel will not be restricted by C-DRX, that is to say, whether C-DRX is configured does not affect the work of the power-saving PDCCH. The DCI of the power-saving physical downlink control channel may contain various control information to activate various power-saving mechanisms or technologies. For example, the DCI of the power-saving physical downlink control channel may contain one or more of the following control information: wake-up indication, sleep-entry indication, inter-slot scheduling indication, start reference signaling transmission indication, start channel quality indication CQI reporting, Single-cell/multi-cell operation instructions, etc. The following is an example of a power saving PDCCH configuration (PS-PDCCH-Config).

PS-PDCCH-Config information element

The PS-PDCCH-Config configuration contains parameters ps-RNTI, ps-Index, ps-DCI-field, etc. The ps-RNTI is a power-saving wireless network temporary identifier configured for the power-saving PDCCH, and is used to scramble the CRC of the power-saving PDCCH. The parameter ps-RNTI is optional, that is to say, the parameter ps-RNTI can be configured or not configured. The ps-Index is a power saving index number, which is used to indicate the starting bit position of the UE's information field in the DCI of the group common PDCCH or the index number of the UE ordering of the UE's information field in the DCI of the group common PDCCH. The ps-DCI-field is the information field of the UE in the DCI of the group common PDCCH, and is used to configure various power saving mechanisms or technologies of the UE. The size of the field is configurable or determined by the configured various power saving mechanisms or The amount of technology and/or its corresponding various power saving mechanisms or the number of bits required for the technology indication. The information field refers to a continuously distributed bit region of the UE in the DCI of the group common PDCCH. The ps-DCI-field in the example contains parameters Wakeup, Go-to-sleep, Cross-slot scheduling, etc. Among them, the parameter Wakeup is the wakeup indication, the parameter Go-to-sleep is the sleep indication, and the Cross-slot scheduling is the cross-slot scheduling indication. The parameters Wakeup, Go-to-sleep, and Cross-slot scheduling configured in the ps-DCI-field in the example indicate the bit length of the parameter, and the bit information content of the information field is indicated by the DCI of the PS-PDCCH.

The configuration method of PS-PDCCH-Config may be physical layer signaling and/or Media Access Control (MAC: Media Access Control) signaling and/or UE-specific Radio Resource Control (RRC: Radio Resource Control) signaling and/or The public RRC signaling and/or system information (SI: System Information) may also be any combination of the above-mentioned multiple configuration modes.

For Group Common PS-PDCCH or Group Common DCI, the information fields of multiple UEs will be multiplexed in the same DCI, and the size of the information fields of each UE in the same group may be the same or different. This embodiment describes the case where UEs with the same information field size are multiplexed in the same Group Common DCI.

The DCI size of the PS-PDCCH may also be referred to as the payload size of the DCI of the PS-PDCCH. For example, the DCI size of the PS-PDCCH or the payload size of the DCI of the PS-PDCCH is M bits, where M is a positive integer. That is to say, there are M bits in the DCI of the PS-PDCCH, and the M bits are numbered 0, 1, 2, 3, ..., M-1. Only UEs with the same information field size can be multiplexed in the DCI of the same PS-PDCCH.

The DCI size M of the PS-PDCCH can be pre-defined, and can also be determined through physical layer signaling and/or Media Access Control (MAC: Media Access Control) signaling and/or UE-specific Radio Resource Control (RRC: Radio Resource Control) signaling. and/or common RRC signaling and/or system information for configuration.

Hereinafter, how to obtain the bit position occupied by the UE in the DCI of the PS-PDCCH is specifically described. For the case where UEs with the same information field size are multiplexed in the same Group Common DCI, there are the following two ways.

method one

The power saving index number ps-Index is used to indicate the index number of the UE ordering in the DCI of the group common PDCCH in the information field of the UE

Assuming that the size of the information field ps-DCI-field of a certain UE is N bits, the ps-Index is taken from {1, 2, 3, ..., Q-1, Q}, Q=floor(M /N), the floor point is rounded down, it can also be considered that Q is the maximum number of UEs that can be multiplexed in the DCI of the PS-PDCCH, and N and Q are positive integers. Then the bit position occupied by the UE in the DCI of the PS-PDCCH is (ps-Index-1)*N, (ps-Index-1)*N+1, ..., (ps-Index-1)*N+( N-1).

The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, it can obtain the size N of the information field of the UE, and the index number used to indicate the UE ordering of the UE in the DCI of the group common PDCCH ps-Index. According to the size M of the DCI of the PS-PDCCH, the number Q of UEs that can be multiplexed by the DCI can be obtained, or the possible values of the ps-Index {1, 2, ..., Q-1, Q}, Q= floor(M/N). Thus, the bit positions occupied by the UE in the DCI of the PS-PDCCH (ps-Index-1)*N, (ps-Index-1)*N+1, ..., (ps-Index-1)* N+(N-1). If (ps-Index-1)*N+(N-1)>M-1, it is considered that the PS-PDCCH-Config configuration information configured for the UE is invalid, that is, the configured configuration information is unavailable.

As shown in FIG. 5 , the DCI size of the PS-PDCCH is 12 bits as an example for description. Only UEs with the same information field size can be multiplexed in the DCI of the same PS-PDCCH. Therefore, there are altogether 6 DCI formats as shown in FIG. 5 , that is, the DCI formats with the information field size N of 1, 2, 3, 4, 5 and 6 bits respectively. The DCI format with the information domain size N of 1 bit can multiplex up to Q=floor(12/1)=12 UEs with the information domain size N of 1 bit; the DCI format with the information domain size N of 2 bits can be multiplexed at most. With Q=floor(12/2)=6 UEs whose information field size is 2 bits; the DCI format whose information field size N is 3 bits can multiplex at most Q=floor(12/3)=4 information field sizes N is a 3-bit UE; a DCI format with an information field size N of 4 bits can multiplex up to Q=floor(12/4)=3 UEs with an information field size N of 4 bits; the information field size N is 5 bits The DCI format can multiplex at most Q=floor(12/5)=2 UEs whose information field size N is 5 bits, and the remaining 2 bits are not used; the DCI format whose information field size N is 6 bits can be used at most Q=floor(12/6)=2 UEs whose information field size N is 6 bits can be multiplexed.

Alternatively, in addition to the above-mentioned 6 DCI formats, 6 DCI formats with the multiplexed information field size N of 7, 8, 9, 10, 11 and 12 bits, respectively, may also be defined. At this time, for the 6 DCI formats with the size N of the information field being 7, 8, 9, 10, 11 and 12 bits respectively, only one UE can be multiplexed in the DCI of the PS-PDCCH. The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, the size N of the information field of the UE can be obtained, and then select the corresponding DCI format to receive the PS-PDCCH according to the size N of the information field.

Alternatively, the UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, the size N of the information field of the UE can be obtained, and the UE used to indicate that the UE is in the DCI of the group common PDCCH. Sorted index number ps-Index. According to the size M of the DCI of the PS-PDCCH, the number Q of UEs that can be multiplexed by the DCI can be obtained, or the possible values of the ps-Index {1, 2, ..., Q-1, Q}, Q= floor(M/N). Thus, the bit positions occupied by the UE in the DCI of the PS-PDCCH can be obtained as (ps-Index-1)*N, (ps-Index-1)*N+1,...,(ps-Index-1) *N+(N-1).

Method 2

The power saving index number ps-Index is used to indicate the starting bit position of the UE's information field in the DCI of the group common PDCCH.

It is assumed that the size of the information field ps-DCI-field of a certain UE is N bits, N is a positive integer, and the ps-Index is taken from {0, 1, 2, ..., M-1}. The bit positions occupied by the UE in the DCI of the PS-PDCCH are ps-Index, ps-Index+1, ..., ps-Index+(N-1). If ps-Index+(N-1)>M-1, it is considered that the PS-PDCCH-Config configuration information configured for the UE is invalid, that is, the configured configuration information is unavailable.

The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, the size N of the information field of the UE, and the starting bit position ps used to indicate the UE in the DCI of the group common PDCCH. -Index. Thus, the bit positions ps-Index, ps-Index+1, . . . , ps-Index+(N-1) occupied by the UE in the DCI of the PS-PDCCH can be obtained. According to the size M of the DCI of the PS-PDCCH, it can be determined whether the PS-PDCCH-Config configuration information configured by the base station for the UE is valid, or whether the PS-PDCCH-Config configuration information configured by the base station for the UE can be determined. available.

Example 3

In Embodiment 3, as an example, the case where UEs with different information field sizes can be multiplexed in the same Group CommonDCI is described.

The process of realizing power saving based on the power saving channel of the physical downlink control channel mainly refers to that the base station instructs the UE to adjust the related parameters to reduce energy consumption. The physical downlink control channel used for power saving may be a UE-specific (UE-specific) physical downlink control channel, or may be a group common (group common) physical downlink control channel. The UE-specific physical downlink control channel means that the physical channel is only used for a specific UE, and the downlink control information carried by it only contains the information of the user. The cyclic redundancy check (Cyclic Redundancy Check) of the physical downlink control channel Check, CRC) can be scrambled with the UE's Cell-RadioNetwork Temporary Identifier (C-RNTI), or can be scrambled with a certain wireless network temporary identifier configured for the physical downlink control channel used for power saving. Scrambling, UE-specific power saving (Power Saving, PS) physical downlink control channel is also called UE-specific PS-PDCCH, or UE-specific PS DCI, or UE-specific DCI, etc. The power-saving physical downlink control channel common to a group of UEs can be used for more than one UE or multiple UEs, and the downlink control information carried by it includes one or more UE control information. The cyclic redundancy check of the physical downlink control channel (Cyclic Redundancy Check, CRC) is scrambled with the wireless network temporary identifier or the power-saving wireless network temporary identifier configured for the physical downlink control channel for power saving. The power-saving physical downlink control channel common to a group of UEs is also called a group common section. The electrical physical downlink control channel Group Common PS-PDCCH, or Group Common PS-DCI, or Group Common DCI, etc.

The power saving channel based on the physical downlink control channel can be considered together with the connected discontinuous reception (Connected-Discontinuous Reception, C-DRX), or can be considered separately. When considered together with C-DRX, the power saving channel based on the physical downlink control channel is before the "on duration" of the C-DRX cycle, and there is a time offset between the start time position of the "on duration" of the C-DRX cycle quantity. For the UE, the power saving channel based on the physical downlink control channel can play a wake-up role, that is, when the UE detects the power saving channel based on the physical downlink control channel, the UE will monitor and receive the PDCCH and/or PDCCH for scheduling. Reference signaling and/or other physical channels and/or other signaling, and when the UE does not detect the power saving channel based on the physical downlink control channel, the UE will not monitor the PDCCH and/or reference signal for scheduling. and/or other physical channels and/or other signaling. When considered separately, the power-saving channel based on the physical downlink control channel will not be restricted by C-DRX, that is to say, whether C-DRX is configured does not affect the work of the power-saving PDCCH. The DCI of the power-saving physical downlink control channel may contain various control information to activate various power-saving mechanisms or technologies. For example, the DCI of the power-saving physical downlink control channel may contain one or more of the following control information: wake-up indication, sleep-entry indication, inter-slot scheduling indication, start reference signaling transmission indication, start channel quality indication CQI reporting, Single-cell/multi-cell operation instructions, etc. The following is an example of a power saving PDCCH configuration (PS-PDCCH-Config).

PS-PDCCH-Config information element

The PS-PDCCH-Config configuration contains parameters ps-RNTI, ps-Index, ps-DCI-field, etc. The ps-RNTI is a power-saving wireless network temporary identifier configured for the power-saving PDCCH, and is used to scramble the CRC of the power-saving PDCCH. The parameter ps-RNTI is optional, that is to say, the parameter ps-RNTI can be configured or not configured. The ps-Index is a power saving index number, which is used to indicate the starting bit position of the UE's information field in the DCI of the group common PDCCH or the index number of the UE ordering of the UE's information field in the DCI of the group common PDCCH. The ps-DCI-field is the information field of the UE in the DCI of the group common PDCCH, and is used to configure various power saving mechanisms or technologies of the UE. The size of the field is configurable or determined by the configured various power saving mechanisms or The amount of technology and/or its corresponding various power saving mechanisms or the number of bits required for the technology indication. The information field refers to a continuously distributed bit region of the UE in the DCI of the group common PDCCH. The ps-DCI-field in the example contains parameters Wakeup, Go-to-sleep, Cross-slot scheduling, etc. Among them, the parameter Wakeup is the wakeup indication, the parameter Go-to-sleep is the sleep indication, and the Cross-slot scheduling is the cross-slot scheduling indication. The parameters Wakeup, Go-to-sleep, and Cross-slot scheduling configured in the ps-DCI-field in the example indicate the bit length of the parameter, and the bit information content of the information field is indicated by the DCI of the PS-PDCCH.

The configuration method of PS-PDCCH-Config may be physical layer signaling and/or Media Access Control (MAC: Media Access Control) signaling and/or UE-specific Radio Resource Control (RRC: Radio Resource Control) signaling and/or The public RRC signaling and/or system information (SI: System Information) may also be any combination of the above-mentioned multiple configuration modes.

For Group Common PS-PDCCH or Group Common DCI, the information fields of multiple UEs will be multiplexed in the same DCI, and the size of the information fields of each UE in the same group may be the same or different. This embodiment describes the case where UEs with different information field sizes can be multiplexed in the same Group Common DCI.

The DCI size of the PS-PDCCH may also be referred to as the payload size of the DCI of the PS-PDCCH. For example, the DCI size of the PS-PDCCH or the payload size of the DCI of the PS-PDCCH is M bits, where M is a positive integer. That is to say, there are M bits in the DCI of the PS-PDCCH, and the M bits are numbered 0, 1, 2, 3, ..., M-1. UEs with different information field sizes can be multiplexed in the DCI of the same PS-PDCCH. The reusable information field sizes are 1, 2, 3, 4, . . . , M-1, and M bits, respectively. When the size of the information field configured by a certain UE of the DCI of the PS-PDCCH is M bits, at this time, only one UE can be multiplexed in the DCI of the PS-PDCCH.

Hereinafter, how to obtain the bit position occupied by the UE in the DCI of the PS-PDCCH is specifically described. For the case where UEs with different information field sizes are multiplexed in the same Group Common DCI, there is one of the following methods.

method one

The power saving index number ps-Index is used to indicate the starting bit position of the UE's information field in the DCI of the group common PDCCH.

The parameter ps-Index can be configured to any value in {0, 1, 2, 3, 4, ..., M-1}. The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, the size N of the information field of the UE, and the starting bit position ps used to indicate the UE in the DCI of the group common PDCCH. -Index. The bit positions occupied by the UE in the DCI of the PS-PDCCH are ps-Index, ps-Index+1, ..., ps-Index+(N-1). If ps-Index+(N-1)>M-1, it is considered that the PS-PDCCH-Config configuration information configured for the UE is invalid, that is, the configured configuration information is unavailable.

As shown in FIG. 6 , taking the DCI size of the PS-PDCCH as an example of 12 bits for illustration, UEs with different information field sizes can be multiplexed in the DCI of the same PS-PDCCH. The reusable information field sizes are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 bits, respectively. When the size of the information field configured by a certain UE of the DCI of the PS-PDCCH is 12, at this time, only one UE can be multiplexed in the DCI of the PS-PDCCH. The DCI of the PS-PDCCH in Figure 6(a) multiplexes 4 UEs with information domain sizes of 1, 2, 3 and 6 respectively; the DCI of the PS-PDCCH in Figure 6(b) multiplexes information Three UEs with domain sizes of 7, 2, and 3, respectively; the DCI of the PS-PDCCH in Figure 6(c) multiplexes three UEs with information domain sizes of 9, 1, and 2, respectively. In addition to the combinations shown in the figures, other various combinations are also possible, which are not shown one by one here.

The parameter ps-Index can be configured to be any value in {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}. It is assumed that the size of the parameter ps-DCI-field configured for a certain UE is N bits, that is, the size of the information field of the UE is N bits. The bit positions occupied by the UE in the DCI of the PS-PDCCH are ps-Index, ps-Index+1, . . . , ps-Index+(N-1). If ps-Index+(N-1)>11, it is considered that the PS-PDCCH-Config configuration information configured for the UE is invalid, that is, the configured configuration information is unavailable.

The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, the size N of the information field of the UE and the ps-Index index number can be obtained. Then according to ps-Index, ps-Index+1, ..., ps-Index+(N-1), the corresponding bit information can be extracted from the received DCI of the PS-PDCCH. At the same time, according to the size M of the DCI of the PS-PDCCH, it can be determined whether the PS-PDCCH-Config configuration information configured by the base station for the UE is valid, or it can be determined whether the PS-PDCCH-Config configuration configured by the base station for the UE is valid. information is available.

Alternatively, the power saving index number ps-Index may be used to indicate the starting bit position of the UE in the DCI of the group common PDCCH and the number or length of the occupied bits, that is, the SLIV (Start and Lnegth Indicator Value) value. The meaning of each bit can be indicated by the UE's information field ps-DCI-field or other configurations.

All of the above-mentioned embodiments can be implemented individually or in combination with one or more of the embodiments.

The configuration methods involved in all the above embodiments may be physical layer signaling and/or media access control (MAC: Media Access Control) signaling and/or radio resource control (RRC: Radio Resource Control) signaling and/or system Information (SI: System Information).

The method and related apparatus of the present application have been described above with reference to the preferred embodiments. Those skilled in the art will understand that the methods shown above are only exemplary. The method of the present application is not limited to the steps and sequences shown above. The network node and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations, or UEs, and so on. The various identifiers shown above are only exemplary and not restrictive, and the present application is not limited to specific information elements that are examples of these identifiers. Numerous changes and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-mentioned embodiments of the present application may be implemented by software, hardware, or a combination of both software and hardware. For example, the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.

In this application, "base station" refers to a mobile communication data and control switching center with larger transmit power and wider coverage area, including functions such as resource allocation and scheduling, and data reception and transmission. "User equipment" refers to a user's mobile terminal, for example, including a mobile phone, a notebook, and other terminal equipment that can wirelessly communicate with a base station or a micro base station.

Furthermore, the embodiments of the present application disclosed herein may be implemented on a computer program product. More specifically, the computer program product is a product having a computer-readable medium on which computer program logic is encoded that, when executed on a computing device, provides relevant operations to achieve The above technical solutions of the present application. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present application. Such arrangements of the present application are typically provided as software, code and/or other data structures arranged or encoded on a computer-readable medium, such as an optical medium (eg, CD-ROM), a floppy or hard disk, or other data structures such as one or more Firmware or other medium of microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present application.

In addition, each functional module or each feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits. Circuits designed to perform the various functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs) or other Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by digital circuits, or may be configured by logic circuits. In addition, when an advanced technology that can replace the current integrated circuit appears due to the advancement of semiconductor technology, the present application can also use the integrated circuit obtained by using the advanced technology.

Although the present application has been shown above in conjunction with the preferred embodiments of the present application, those skilled in the art will appreciate that various modifications, substitutions and changes can be made in the present application without departing from the spirit and scope of the present application. Therefore, the application should be limited not by the above-described embodiments, but by the appended claims and their equivalents.

A program running on a device according to the present invention may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU). The program or information processed by the program may be temporarily stored in volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory systems.

A program for realizing the functions of the embodiments of the present invention can be recorded on a computer-readable recording medium. The corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs. The so-called "computer system" as used herein may be a computer system embedded in the device, and may include an operating system or hardware (eg, peripheral devices). The "computer-readable recording medium" may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that dynamically stores a program for a short period of time, or any other recording medium readable by a computer.

The various features or functional blocks of the devices used in the above-described embodiments may be implemented or performed by electrical circuits (eg, monolithic or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above. A general-purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine. The above circuit may be a digital circuit or an analog circuit. In the event that new integrated circuit technologies appear to replace existing integrated circuits due to advances in semiconductor technology, the present invention may also be implemented using these new integrated circuit technologies.

As above, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above-mentioned embodiment, and the present invention also includes any design changes that do not deviate from the gist of the present invention. In addition, various modifications can be made to the present invention within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, the components described in the above-described embodiments having the same effect may be substituted for each other.

Claims (8)

1. A method performed by a User Equipment (UE), comprising:

receiving configuration information for configuring a power saving channel for User Equipment (UE) from a base station, wherein the power saving channel is based on a Physical Downlink Control Channel (PDCCH);

determining whether the power-saving channel is a UE-specific PDCCH or a group of UE-common PDCCHs according to the received configuration information; and

and if the power-saving channel is a PDCCH common to a group of UE, determining the initial position of an information field of the UE in the DCI of the power-saving channel and the bit number occupied by the information field in the DCI of the power-saving channel according to the received configuration information.

2. The method of claim 1, wherein,

and if the configuration information contains the power-saving wireless network temporary identifier ps-RNTI, scrambling the Cyclic Redundancy Check (CRC) of the power-saving channel by using the ps-RNTI.

3. The method of claim 1, wherein,

judging whether the power-saving channel is a PDCCH common to a group of UE or a PDCCH specific to the UE according to whether the configuration information contains the power-saving radio network temporary identity ps-RNTI or not,

if the configuration information contains the power-saving radio network temporary identifier ps-RNTI, the power-saving channel is a PDCCH common to a group of UE, and if the configuration information does not contain the power-saving radio network temporary identifier ps-RNTI, the power-saving channel is a PDCCH specific to the UE.

4. The method of claim 1, wherein,

judging whether the power-saving channel is a group of PDCCH common to the UE or a PDCCH specific to the UE according to the bit number occupied by the information field of the UE in the downlink control information DCI of the power-saving channel,

if the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power-saving channel is less than or equal to a fixed value, the power-saving channel is a PDCCH common to a group of UE, and if the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power-saving channel is greater than or equal to the fixed value, the power-saving channel is a PDCCH specific to the UE.

5. The method of claim 1, wherein,

if the power-saving channel is a set of PDCCH common to the UE, the configuration information comprises a power-saving Index number ps-Index for indicating the initial position of the information field of the UE in the downlink control information DCI of the power-saving channel.

6. The method of claim 5, wherein,

assuming that the number of bits occupied by the information field of the UE in the DCI of the power saving channel is N bits, the positions of the bits occupied by the information field of the UE in the DCI of the power saving channel are ps-Index, ps-Index + 1.

7. The method of claim 6, wherein,

assuming that the payload of the DCI of the power saving channel is M bits, if ps-Index + (N-1) > M-1, the configuration information for configuring the power saving channel for the user equipment UE is invalid, wherein M is a positive integer.

8. A user equipment, comprising:

a processor; and

a memory storing instructions;

wherein the instructions, when executed by the processor, perform the method of any of claims 1 to 7.

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