CN111417193A

CN111417193A - Access method, terminal and base station for bandwidth part BWP

Info

Publication number: CN111417193A
Application number: CN201910010585.8A
Authority: CN
Inventors: 董文佳; 陆松鹤; 马帅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-01-07
Filing date: 2019-01-07
Publication date: 2020-07-14
Anticipated expiration: 2039-01-07
Also published as: CN111417193B

Abstract

The invention provides an access method, a terminal and a base station of bandwidth part BWP, wherein the method comprises the following steps: when the terminal is in a Radio Resource Control (RRC) connected state, receiving a BWP configuration set updated after a base station configures full-bandwidth BWP for the terminal, and determining the currently activated BWP in the BWP configuration set; determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in a BWP currently activated by a terminal; and the receiving base station configures the target BWP for the terminal after the BWP configuration updating process is started, and accesses the target BWP. The BWP related configuration and activated BWP are updated by fully utilizing the channel quality information of the terminal, so that the BWP configured by the base station better conforms to the channel state and the transmission requirement of the terminal, the data transmission performance and the power consumption performance of the terminal are ensured, the user experience is ensured, and the complexity of the processing and scheduling of the base station is reduced.

Description

Access method, terminal and base station for bandwidth part BWP

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an access method, a terminal, and a base station for BWP.

Background

The Third Generation Partnership Project (3 GPP) introduces BWP (Bandwidth Part) features for 5GNR (5Generation New RAT), one of the purposes is to ensure that a small Bandwidth UE (User Equipment) can operate in a large system Bandwidth cell, and the other is to ensure that the UE uses different operating bandwidths in different states, so as to save terminal power consumption: for example, in the low data period, the UE is enabled to listen to or transmit the control channel with a small bandwidth, and in the high data period, the UE is enabled to receive or transmit data with a large bandwidth.

Each BWP is formed by a segment of continuous PRB (physical resource block), and the corresponding bandwidth, frequency domain starting position, SCS (Sub-Channel Spacing), and CP (Cyclic Prefix) length can be flexibly configured. The standard defines that BWP has a distinction between uplink and downlink, and uplink/downlink can be configured with different parameters according to requirements. Depending on the applicable scenarios, BWPs can be roughly classified into two categories: one is initial activation BWP, which is used for the initial access phase of the terminal and the terminal is in the RRC (Radio Resource Control) idle state; the other is BWP configured in RRC connected state for the terminal in RRC connected state. The terminal obtains related Information of uplink/downlink initial activation BWP by reading RMSI (Remaining Minimum System Information) of the cell, where the downlink initial activation BWP is used to transmit SIB (System Information block) Information, paging messages, and randomly accessed Msg2/4, and the uplink initial activation BWP is used to transmit randomly accessed uplink Information. The network can configure different BWPs (at most four uplink/downlink of each UE) for different UEs, and the related configuration information of the BWPs is notified to the terminal through an RRC signaling sent by the network. Although the network may configure multiple BWPs for each UE, 3GPP Rel-15 specifies that only 1 BWP can be respectively activated in uplink/Downlink at the same time, and outside the activated Downlink BWP, the UE no longer receives PDSCH (Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel), or CSI-RS (Channel state indication Reference Signal); outside the active Uplink BWP, the UE does not transmit PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel). In the connected state, if the UE configures a plurality of BWPs, the terminal performs BWP handover by parsing DCI (Downlink Control Information) indication in the PDCCH or by expiration of a BWP deactivation timer (BWP-inactivity timer). The deactivation timer is used to switch the currently active BWP to the default BWP, and is restarted when the PDCCH is successfully received on the active BWP, and if the timer expires, the terminal is switched to the default BWP.

In the existing BWP related mechanism of 5G NR, for initial access BWP and RRC connected BWP, both related configuration information and activation/deactivation procedures are decided and indicated to the terminal by the network, including: bandwidth, frequency domain starting position, SCS, CP length, deactivation timer duration, default BWP, and connected state activated BWP for each uplink/downlink BWP, etc. Although the 3GPP specification defines that the network can flexibly configure different BWPs for each UE, such configuration flexibility may increase the complexity of base station processing and scheduling for the network, so that the network may configure BWPs only for specific users (e.g., small bandwidth terminals or industry-specific terminals) individually, and adopt the same BWP configuration for a large number of general users in the network. This makes it highly likely that the BWP of the network configuration/activation does not match the actual channel quality or terminal state.

On the other hand, even though the network may want to configure a corresponding BWP for each terminal by fully utilizing the flexibility of BWP configuration regardless of the processing and scheduling complexity that may occur, the current mechanism may also exhibit a phenomenon that the BWP of the network configuration is not adapted to the channel quality or terminal state of the terminal. For example, after the terminal enters the RRC connected state, the network first needs to send a corresponding BWP configuration set to the UE through an RRC reconfiguration message, where the set includes 1-4 BWPs configured for uplink/downlink of the UE, and may activate one of the BWPs; in the following data transmission scheduling process, the BWP switching may be performed through DCI signaling, that is, other BWPs in the set are activated while the current BWP is deactivated by default. As the wireless terminal moves, the channel state of the terminal is constantly changing, and channel change conditions such as frequency selective fading may cause that BWP configured and activated by the network is not matched with the channel state of the terminal, thereby affecting the demodulation performance and user experience of uplink/downlink data of the terminal.

Disclosure of Invention

The embodiment of the invention provides an access method of a bandwidth part BWP (broadband remote procedure), a terminal and a base station, which aim to solve the problems that in the prior art, the BWP configured for the terminal by the base station does not conform to the channel state of the terminal, and the demodulation performance and the user experience of uplink/downlink data of the terminal are influenced.

The embodiment of the invention provides an access method of a bandwidth part BWP, which is applied to a terminal and comprises the following steps:

when a terminal is in a Radio Resource Control (RRC) connected state, receiving a BWP configuration set updated after a base station configures full-bandwidth BWP for the terminal, and determining the currently activated BWP in the BWP configuration set;

determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in the BWP currently activated by the terminal;

and receiving a target BWP configured for the terminal by the base station after the BWP configuration updating process is started, and accessing the target BWP.

Preferably, when the terminal is in the RRC connected state, the receiving base station configures an updated BWP configuration set after configuring the full bandwidth BWP for the terminal, and determines a currently active BWP in the BWP configuration set, where the receiving base station includes:

when the terminal is in an RRC connected state, receiving a full bandwidth BWP configured for the terminal and sent by the base station through RRC configuration information, and activating the full bandwidth BWP according to the RRC configuration information;

and receiving a BWP configuration set updated by the base station for the terminal, and selecting the currently activated BWP in the BWP configuration set.

Preferably, the step of determining to start a BWP configuration update procedure according to uplink and/or downlink channel quality information in the BWP currently activated by the terminal includes:

measuring the quality of a downlink channel of each sub-band in the currently activated BWP;

comparing the downlink channel quality of each sub-band with a corresponding first downlink channel quality threshold value to obtain the number of sub-bands of which the downlink channel quality is less than or equal to the first downlink channel quality threshold value;

calculating a first ratio of the obtained number of sub-bands to the total number of sub-bands in the currently activated BWP;

and if the first ratio is greater than or equal to a preset first sub-band channel quality deterioration ratio threshold value, the terminal determines to start a BWP configuration updating process.

Preferably, the step of measuring the downlink channel quality of each sub-band in the currently activated BWP includes:

and measuring the downlink channel quality of each sub-band in a preset first measurement window duration.

Preferably, after the terminal determines whether to start a BWP configuration update procedure, the method further includes: and reporting terminal auxiliary information carrying a message whether to start a BWP configuration updating process to the base station.

receiving notification information which is sent by the base station based on the uplink channel quality of each sub-band in the currently activated BWP and carries a message for starting a BWP configuration updating process;

determining to start a BWP configuration updating process according to the notification information.

acquiring the number of sub-bands of which the downlink channel quality is less than or equal to a first downlink channel quality threshold value according to the downlink channel quality of each sub-band in the currently activated BWP and the corresponding first downlink channel quality threshold value, and calculating a first ratio of the acquired number of sub-bands to the total number of sub-bands in the currently activated BWP;

and when the first ratio is greater than or equal to a preset first sub-band channel quality deterioration ratio threshold value and the notification information is received, determining to start a BWP configuration updating process.

Preferably, the step of receiving the target BWP configured by the base station for the terminal after the BWP configuration update procedure is started, and accessing the target BWP includes:

if the base station configures a plurality of RRC connection state BWPs for the terminal in a BWP configuration set, after a BWP configuration updating process is started, receiving a BWP which is activated by the base station in the plurality of RRC connection state BWPs and is different from the current BWP;

and judging whether the uplink/downlink channel quality of the activated BWP meets a preset condition, if so, determining the activated BWP as the target BWP, and accessing the target BWP.

if the base station configures an RRC connected state BWP for the terminal in a BWP configuration set or the quality of uplink/downlink channels of a plurality of configured RRC connected state BWPs does not meet a preset condition, receiving trigger information sent by the base station;

sending a channel Sounding Reference Signal (SRS) to the base station according to the trigger information;

and receiving the updated target BWP after the base station acquires the quality of the full-bandwidth uplink/downlink channel according to the SRS, and accessing the target BWP.

The embodiment of the invention provides an access method of bandwidth part BWP, which is applied to a base station and comprises the following steps:

when a terminal is in a Radio Resource Control (RRC) connected state, configuring a full bandwidth BWP for the terminal and updating a BWP configuration set, and then sending the BWP configuration set to the terminal;

starting a BWP configuration updating process according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set;

configuring a target BWP for the terminal and sending the BWP to the terminal.

Preferably, the step of sending the BWP configuration set to the terminal after configuring the full bandwidth BWP for the terminal and updating the BWP configuration set when the terminal is in the RRC connected state includes:

when the terminal is in an RRC connected state, sending a full bandwidth BWP configured for the terminal to the terminal through RRC configuration information, and activating the full bandwidth BWP;

configuring a channel Sounding Reference Signal (SRS) and a channel state indication reference signal (CSI-RS), and performing broadband and/or narrowband uplink/downlink channel quality measurement in a full bandwidth according to the SRS and the CSI-RS to obtain uplink/downlink channel state information;

and updating a BWP configuration set and sending the BWP configuration set to the terminal according to the uplink/downlink channel state information, the service requirement of the terminal and the scheduling strategy.

Preferably, the step of starting a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set includes:

measuring the uplink channel quality of each sub-band in the currently activated BWP;

comparing the uplink channel quality of each sub-band with a corresponding first uplink channel quality threshold value to obtain the number of the sub-bands of which the uplink channel quality is less than or equal to the first uplink channel quality threshold value;

calculating a second ratio of the obtained number of sub-bands to the total number of sub-bands in the currently activated BWP;

and if the second ratio is greater than or equal to a preset second sub-band channel quality deterioration ratio threshold value, starting a BWP configuration updating process.

Preferably, the step of measuring the uplink channel quality of each sub-band in the currently activated BWP includes:

and measuring the uplink channel quality of each sub-band in a preset second measurement window duration.

receiving terminal auxiliary information which is reported by the terminal based on the downlink channel quality of each sub-band in the currently activated BWP and carries a message whether to start a BWP configuration updating process;

and starting the BWP configuration updating process when the terminal auxiliary information carries a BWP configuration updating process starting message.

acquiring the number of sub-bands of which the uplink channel quality is less than or equal to a first uplink channel quality threshold value according to the uplink channel quality of each sub-band in the currently activated BWP and the corresponding first uplink channel quality threshold value, and calculating a second ratio of the acquired number of sub-bands to the total number of sub-bands in the currently activated BWP;

and starting a BWP configuration updating process when the second ratio is greater than or equal to a preset second sub-band channel quality deterioration ratio threshold value and the terminal auxiliary information carries a message for starting the BWP configuration updating process.

Preferably, the step of configuring the target BWP for the terminal and sending the target BWP to the terminal includes:

activating a BWP (multicast broadcast protocol) different from a currently activated BWP (multicast broadcast protocol) in a plurality of RRC (radio resource control) connected state BWPs in a BWP configuration set configured for the terminal by sending downlink control information DCI (downlink control information) to the terminal, and controlling the currently activated BWP to be switched to a deactivated state;

and if the uplink/downlink channel quality of the BWP activated by the base station meets a preset condition, determining the activated BWP as the target BWP.

if the base station configures an RRC connection state BWP for the terminal in a BWP configuration set or configures a plurality of RRC connection state BWPs of which the uplink/downlink channel quality does not meet preset conditions, triggering the terminal to send a channel Sounding Reference Signal (SRS);

receiving the SRS sent by the terminal, and acquiring the quality of a full-bandwidth uplink/downlink channel according to the SRS;

and configuring a target BWP for the terminal and sending the BWP to the terminal according to the quality of a full-bandwidth uplink/downlink channel, the service requirement of the terminal and the uplink/downlink data volume needing to be scheduled.

Preferably, the step of configuring a target BWP for the terminal and sending the target BWP to the terminal according to the quality of the full-bandwidth uplink/downlink channel and the service requirement of the terminal and the amount of uplink/downlink data to be scheduled includes:

determining the number of BWPs configured for the terminal and the frequency domain bandwidth of each BWP according to full-bandwidth uplink/downlink channel quality information, the service requirement of the terminal and the uplink/downlink data volume required to be scheduled;

determining a sliding window comprising a continuous segment of physical resource blocks, PRBs, for the frequency domain bandwidth of each BWP;

acquiring the number of sub-bands of which the uplink/downlink channel quality is greater than or equal to a preset uplink/downlink channel quality threshold value in at least one sliding window;

and if the ratio of the acquired number of the sub-bands to the total number of the sub-bands in the corresponding sliding window is greater than or equal to a preset threshold value, determining the continuous PRBs of the segment as the target BWP and sending the target BWP to the terminal.

The embodiment of the invention provides a terminal, which comprises a processor and a transceiver, wherein the transceiver is used for:

the processor is configured to: determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in the BWP currently activated by the terminal;

the transceiver is to: and receiving a target BWP configured for the terminal by the base station after the BWP configuration updating process is started, and accessing the target BWP.

Preferably, when the terminal is in the RRC connected state, and the receiving base station receives an updated BWP configuration set after configuring the full bandwidth BWP for the terminal, and determines a currently active BWP in the BWP configuration set, the transceiver is further configured to:

Preferably, when determining to start the BWP configuration update procedure according to the uplink and/or downlink channel quality information in the BWP currently activated by the terminal, the processor is further configured to:

and if the first ratio is greater than or equal to a preset first sub-band channel quality deterioration ratio threshold value, determining to start a BWP configuration updating process.

Preferably, when measuring the downlink channel quality of each sub-band in the currently activated BWP, the processor is further configured to:

Preferably, the transceiver is further configured to:

and after the processor determines whether to start the BWP configuration updating process, reporting terminal auxiliary information carrying a message whether to start the BWP configuration updating process to the base station.

controlling the transceiver to receive notification information which is sent by the base station based on the uplink channel quality of each sub-band in the currently activated BWP and carries a message for starting a BWP configuration updating process;

Preferably, when the transceiver receives a target BWP configured by the base station for the terminal after the BWP configuration update procedure is started, and accesses the target BWP, the transceiver is further configured to:

An embodiment of the present invention provides a base station, including a processor and a transceiver, where the transceiver is configured to:

the processor is configured to: starting a BWP configuration updating process according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set;

the transceiver is to: configuring a target BWP for the terminal and sending the BWP to the terminal.

Preferably, when the terminal is in the RRC connected state, configures a full bandwidth BWP for the terminal and updates the BWP configuration set, and then sends the BWP configuration set to the terminal, the transceiver is further configured to:

Preferably, when the processor starts a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set, the processor is further configured to:

Preferably, the processor is further configured to, when measuring the uplink channel quality of each sub-band in the currently activated BWP:

controlling the transceiver to receive terminal auxiliary information which is reported by the terminal based on the downlink channel quality of each sub-band in the currently activated BWP and carries a message whether to start a BWP configuration updating process;

Preferably, when configuring the target BWP for the terminal and transmitting the target BWP to the terminal, the transceiver is further configured to:

and if the uplink/downlink channel quality of the activated BWP meets a preset condition, determining the activated BWP as the target BWP.

Preferably, when the transceiver configures a target BWP for the terminal and transmits the target BWP to the terminal according to the quality of the full-bandwidth uplink/downlink channel and the service requirement of the terminal and the amount of uplink/downlink data to be scheduled, the transceiver is further configured to:

The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the steps in the above-described access method of the bandwidth part BWP on the terminal side when executing the program.

The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the steps in the above-described access method of the bandwidth part BWP on the base station side when executing the program.

An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps in the above-mentioned access method for the bandwidth part BWP on the terminal side or implements the steps in the above-mentioned access method for the bandwidth part BWP on the base station side.

According to the technical scheme, when the terminal is in an RRC connection state, a receiving base station configures a BWP configuration set updated after a full bandwidth BWP is configured for the terminal, and determines the currently activated BWP in the BWP configuration set; determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP; the method comprises the steps that a receiving base station configures a target BWP for a terminal after a BWP configuration updating process is started, and accesses the target BWP, so that the base station can update the BWP related configuration and activated BWP by fully utilizing channel quality information of the terminal, the BWP configured by the base station better conforms to the channel state and transmission requirements of the terminal, the data transmission performance and the power consumption performance of the terminal are guaranteed, the user experience is guaranteed, and the complexity of processing and scheduling of the base station is reduced.

Drawings

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic diagram illustrating an access method of a terminal-side bandwidth portion BWP according to an embodiment of the present invention;

fig. 2 is a diagram illustrating an access method of a base station side bandwidth part BWP according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating an overall access method for BWP according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating an implementation structure of a terminal according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating an exemplary implementation structure of a base station according to an embodiment of the present invention;

FIG. 6 is a diagram of a second implementation structure of the terminal according to the embodiment of the present invention;

fig. 7 is a schematic diagram of a second implementation structure of a base station according to an embodiment of the present invention.

Detailed Description

An embodiment of the present invention provides an access method for BWP, which is applied to a terminal, and as shown in fig. 1, the method includes:

step 101, when the terminal is in the RRC connected state, receiving an updated BWP configuration set after the base station configures the full bandwidth BWP for the terminal, and determining the currently activated BWP in the BWP configuration set.

The BWP access method of the embodiment of the present invention is applied to a scenario in which a terminal enters an RRC connected state, and at this time, the terminal may obtain relevant configuration information of the connected BWP through an RRC signaling, for example, the number of BWPs configured by a base station, a frequency domain starting location and a bandwidth corresponding to each BWP, a BWP deactivation timer duration, a default BWP, and the like.

Specifically, after the terminal is in the RRC connected state, for the base station, the full bandwidth BWP may be configured for the terminal through the RRC configuration message, and the BWP configuration may be activated through the RRC configuration message. Then, the base station configures SRS (Sounding Reference Signal) and CSI-RS (Channel State indication Reference Signal) for performing wideband and/or narrowband uplink/downlink Channel quality measurement within a full bandwidth, and after obtaining uplink/downlink Channel State Information, the BWP configuration set may be updated for the terminal in combination with terminal service requirements and scheduling policies, and may also include other multi-aspect factors, where the set may include 1 to 4 BWPs configured for uplink/downlink of the terminal, a frequency domain starting position and bandwidth corresponding to each BWP, a default BWP, and the like.

For a terminal, a BWP configuration set updated after a base station configures a full bandwidth BWP for the terminal may be received, and after receiving the BWP configuration set, a currently active BWP may be determined in the BWP configuration set.

When the terminal is in a Radio Resource Control (RRC) connected state, the step of receiving a BWP configuration set updated after the base station configures full-bandwidth BWP for the terminal, and determining currently activated BWP in the BWP configuration set includes: when the terminal is in an RRC connected state, receiving a full bandwidth BWP configured for the terminal and sent by the base station through RRC configuration information, and activating the full bandwidth BWP according to the RRC configuration information; and receiving a BWP configuration set updated by the base station for the terminal, and selecting the currently activated BWP in the BWP configuration set.

In a state in which it is determined that the terminal is in the RRC connected state, the full bandwidth BWP transmitted by the base station through the RRC configuration information may be received first, and the received full bandwidth BWP may be activated according to the received RRC configuration information. Then, the base station can perform broadband and/or narrowband uplink/downlink channel quality measurement in the full bandwidth according to the configured SRS and CSI-RS, and update the BWP configuration set for the terminal based on the acquired uplink/downlink channel state information and in combination with the terminal service requirement and the scheduling policy. The terminal may now receive the BWP configuration set updated by the base station for the terminal and select the currently active BWP from the received BWP configuration set. After the terminal determines the currently active BWP, step 102 may be performed.

Step 102, determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in the BWP currently activated by the terminal.

After determining the currently activated BWP, the terminal may determine whether to start a BWP configuration update procedure according to uplink and/or downlink channel quality information in the currently activated BWP. The method for determining whether to start the BWP configuration update process according to the uplink and/or downlink channel quality information in the currently activated BWP includes three specific ways: whether to start the BWP configuration update procedure may be determined according to the uplink channel quality information in the currently activated BWP, whether to start the BWP configuration update procedure may be determined according to the downlink channel quality information in the currently activated BWP, or whether to start the BWP configuration update procedure may be determined according to the uplink channel quality information and the downlink channel quality information in the currently activated BWP.

To describe the following three cases, respectively, for a scheme that determines whether to start a BWP configuration update procedure according to downlink channel quality information, a step of determining to start the BWP configuration update procedure according to uplink and/or downlink channel quality information in the BWP currently activated by the terminal includes: measuring the quality of a downlink channel of each sub-band in the currently activated BWP; comparing the downlink channel quality of each sub-band with the corresponding first downlink channel quality threshold value to obtain the number of the sub-bands of which the downlink channel quality is less than or equal to the first downlink channel quality threshold value; calculating a first ratio of the obtained number of sub-bands to the total number of sub-bands in the currently activated BWP; and if the first ratio is greater than or equal to a preset first sub-band channel quality deterioration ratio threshold value, the terminal determines to start a BWP configuration updating process.

The terminal may preset a first downlink channel quality threshold and a first sub-band channel quality degradation ratio threshold, where the first downlink channel quality threshold is a downlink channel quality degradation critical value, and the first sub-band channel quality degradation ratio threshold is a downlink channel quality degradation ratio critical value. The terminal measures the downlink channel Quality of the currently activated BWP, where the downlink channel Quality may include at least one of RSRP (Reference Signal Receiving Power), RSRQ (Reference Signal Receiving Quality), CQI (channel Quality Indicator), and SINR (Signal to Interference noise ratio), but is not limited thereto. If the currently activated BWP is divided into a plurality of sub-bands, the downlink channel quality of each sub-band in the currently activated BWP needs to be measured and acquired, then the downlink channel quality of each sub-band is compared with a first downlink channel quality threshold value, the number of the sub-bands of which the downlink channel quality is less than or equal to the first downlink channel quality threshold value is counted, and then a first ratio of the counted number of the sub-bands to the total number of the sub-bands in the currently activated BWP is calculated; if the first ratio is greater than or equal to a preset first sub-band channel quality deterioration ratio threshold value, that is, the downlink channel quality deteriorates to a certain degree, the terminal may determine to start the BWP configuration updating process, otherwise, the BWP updating process is not started.

By setting the first downlink channel quality threshold and the first sub-band channel quality deterioration ratio threshold, the terminal can determine whether to start the BWP configuration updating process according to the downlink channel quality of each sub-band in the currently activated BWP, and can ensure that the updating process is started after the downlink channel quality configured by the current BWP reaches a certain degree.

When measuring the downlink channel quality of each sub-band in the currently activated BWP, the method includes: and measuring the downlink channel quality of each sub-band in a preset first measurement window duration. By setting the duration of the first measurement window, the result within the measurement duration can be smoothed, and the robustness of the judgment is enhanced.

Wherein, the method also comprises: after the terminal determines whether to start the BWP configuration update flow, it reports the terminal auxiliary information carrying the BWP configuration update flow start message to the base station. That is, the terminal may define an uplink signaling for indicating the determination result of the terminal: whether a BWP configuration update flow needs to be initiated. Specifically, the terminal may add 1bit field in the terminal auxiliary information to indicate that the terminal determines whether to start the BWP configuration update procedure. Wherein, the value of the field is 0, which indicates that the terminal judges not to start the BWP configuration updating process; if the field value is 1, it indicates that the terminal determines to start the BWP configuration update process. And sending the terminal auxiliary information with the added fields to the base station so that the base station acquires the judgment result of the terminal.

For the solution of determining whether to start a BWP configuration update procedure according to uplink channel quality information, the step of determining to start the BWP configuration update procedure according to uplink and/or downlink channel quality information in the BWP currently activated by the terminal includes: receiving notification information which is sent by a base station based on the uplink channel quality of each sub-band in the currently activated BWP and carries a message for starting the BWP configuration updating process; determining to start a BWP configuration update flow according to the notification information.

The base station may determine whether to start the BWP configuration update procedure according to the uplink channel quality of each sub-band in the currently activated BWP, and after the base station determines to start the BWP configuration update procedure according to the uplink channel quality of each sub-band in the currently activated BWP, the base station may send notification information carrying a BWP configuration update procedure start message to the terminal, and the terminal receives the notification message sent by the base station and determines to start the BWP configuration update procedure according to the notification message sent by the base station.

For the solution of determining whether to start a BWP configuration update procedure according to the uplink channel quality and the downlink channel quality information, the step of determining to start the BWP configuration update procedure according to the uplink and/or downlink channel quality information in the BWP currently activated by the terminal includes: acquiring the number of sub-bands of which the downlink channel quality is less than or equal to a first downlink channel quality threshold value according to the downlink channel quality of each sub-band in the currently activated BWP and a corresponding first downlink channel quality threshold value, and calculating a first ratio of the acquired number of sub-bands to the total number of sub-bands in the currently activated BWP; receiving notification information which is sent by a base station based on the uplink channel quality of each sub-band in the currently activated BWP and carries a message for starting the BWP configuration updating process; and when the first ratio is greater than or equal to a preset first sub-band channel quality deterioration ratio threshold value and the notification information is received, determining to start a BWP configuration updating process.

For the terminal, the terminal may preset a first downlink channel quality threshold and a first sub-band channel quality degradation ratio threshold. The terminal measures and obtains the downlink channel quality of each sub-band in the currently activated BWP, then compares the downlink channel quality of each sub-band with a first downlink channel quality threshold value, counts the number of the sub-bands of which the downlink channel quality is less than or equal to the first downlink channel quality threshold value, and then calculates a first ratio of the counted number of the sub-bands to the total number of the sub-bands in the currently activated BWP.

For the base station, the base station may determine whether to start the BWP configuration update procedure according to the uplink channel quality of each subband in the currently activated BWP, and after determining to start the BWP configuration update procedure, the base station may send notification information carrying a message for starting the BWP configuration update procedure to the terminal.

After obtaining the first ratio, the terminal may compare the first ratio with a first sub-band channel quality degradation ratio threshold, and if the first ratio is greater than or equal to the first sub-band channel quality degradation ratio threshold, that is, the downlink channel quality degrades to a certain degree, and meanwhile, the terminal receives notification information carrying a BWP configuration update procedure start message sent by the base station, the terminal may determine to start the BWP configuration update procedure.

By setting the first downlink channel quality threshold and the first sub-band channel quality degradation ratio threshold, the terminal may determine whether to start the BWP configuration update procedure according to the downlink channel quality of each sub-band in the currently activated BWP and whether to receive the notification information carrying the BWP configuration update procedure start message sent by the base station, which may ensure that the update procedure is started after the channel quality of the current BWP configuration reaches a certain degree. After determining to initiate the BWP configuration update flow, step 103 may be executed.

Step 103, receiving the target BWP configured for the terminal by the base station after the BWP configuration update procedure is started, and accessing the target BWP.

After determining to start the BWP configuration update procedure, the base station may configure the terminal with the target BWP, and the terminal receives the target BWP configured by the base station and accesses the target BWP.

The method comprises the following steps that a receiving base station configures a target BWP for a terminal after a BWP configuration updating process is started, and accesses the target BWP, and comprises the following steps: if the base station configures a plurality of RRC connection state BWPs for the terminal in the BWP configuration set, after the BWP configuration updating process is started, receiving the BWP which is different from the current BWP and is activated by the base station in the plurality of RRC connection state BWPs; and judging whether the uplink/downlink channel quality of the activated BWP meets a preset condition, if so, determining the activated BWP as a target BWP, and accessing the target BWP.

If the BWP configuration set configured by the base station for the terminal includes multiple RRC connected BWPs (i.e. the number of configured BWPs is greater than 1), after the BWP configuration update procedure is started, the base station preferentially changes the activated BWP to improve the channel quality of the BWP used by the terminal for transmission. That is, the base station activates, in the DCI message, a BWP different from a currently activated BWP in the BWP configuration set configured for the terminal, and deactivates the current BWP, and if the uplink/downlink channel quality of the activated BWP meets a preset condition, that is, the uplink/downlink channel quality does not deteriorate to a certain threshold, and further, if the superiority of the uplink/downlink channel quality meets a certain condition, the base station keeps the currently activated BWP for data transmission. When judging whether the uplink/downlink channel quality of the activated BWP meets the preset condition, the base station and the terminal may jointly determine, that is, the terminal determines the downlink channel quality, the base station determines the uplink channel quality, the terminal may obtain the determination result of the base station and the determination result of the terminal at the same time, and then determine whether the uplink/downlink channel quality of the activated BWP meets the preset condition. Upon determining that the uplink/downlink channel quality of the activated BWP satisfies the preset condition, it may be determined that the activated BWP is the target BWP and the target BWP is accessed.

Wherein, the step of receiving the target BWP configured for the terminal by the base station after the BWP configuration update procedure is started, and accessing the target BWP further includes:

if the base station configures one RRC connection state BWP for the terminal in the BWP configuration set or the quality of uplink/downlink channels of a plurality of configured RRC connection state BWPs does not meet the preset condition, receiving the trigger information sent by the base station; sending a channel Sounding Reference Signal (SRS) to a base station according to the trigger information; and the receiving base station acquires the updated target BWP after the full-bandwidth uplink/downlink channel quality is acquired according to the SRS, and accesses the target BWP.

After the BWP configuration update process is started, if the BWP configuration set configured by the base station for the terminal includes one RRC connected BWP, or the BWP configuration set configured by the base station for the terminal includes multiple RRC connected BWPs (the number of BWPs is greater than 1), but the channel quality of each BWP does not satisfy the preset condition (if the degradation reaches a certain threshold), the base station may configure the terminal to transmit an SRS signal, and after the terminal transmits the SRS to the base station, the base station may acquire full-bandwidth uplink/downlink channel quality information by configuring a full-bandwidth SRS or by traversing the full bandwidth with sub-band SRS. And then updating the target BWP based on the full-bandwidth uplink/downlink channel quality information and transmitting the target BWP to the terminal, and the terminal receives the updated target BWP transmitted by the base station and accesses the target BWP.

The BWP access method of the bandwidth part at the terminal side of the embodiment of the invention can lead the base station to update the BWP relevant configuration and activated BWP in time by fully utilizing the quality information of the uplink/downlink channels of the corresponding terminal, lead the BWP configured by the base station to better meet the channel state and transmission requirements of the terminal, ensure the data transmission performance and the power consumption performance of the terminal and ensure the user experience.

Besides the base station can judge whether to start the BWP updating process by measuring the uplink channel quality, the terminal can use the downlink channel quality as the basis for starting the BWP updating process and inform the judgment result to the base station by the uplink signaling without the base station side participating in the measuring and judging process.

By setting the threshold, it can be ensured that the updating process is started after the channel quality of the current BWP configuration reaches a certain degree, and the updated BWP is determined, thereby avoiding frequent updating of BWP configuration and reducing the complexity of base station processing and scheduling.

An embodiment of the present invention provides an access method for BWP, which is applied to a base station, and as shown in fig. 2, the method includes:

step 201, when the terminal is in the RRC connected state, configuring a full bandwidth BWP for the terminal and updating the BWP configuration set, and then sending the BWP configuration set to the terminal.

After the terminal is in the RRC connected state, for the base station, the full bandwidth BWP may be configured for the terminal through an RRC configuration message, and the BWP configuration may be activated through the RRC configuration message. After the base station configures the full bandwidth BWP, the BWP configuration set may be updated for the terminal and the updated BWP configuration set may be sent to the terminal.

When the terminal is in a Radio Resource Control (RRC) connected state, configuring a full-bandwidth BWP for the terminal and updating a BWP configuration set, and then sending the BWP configuration set to the terminal, the method comprises the following steps:

when the terminal is in an RRC connected state, sending a full bandwidth BWP configured for the terminal to the terminal through RRC configuration information, and activating the full bandwidth BWP; configuring a channel Sounding Reference Signal (SRS) and a channel state indication reference signal (CSI-RS), and performing broadband and/or narrowband uplink/downlink channel quality measurement in a full bandwidth according to the SRS and the CSI-RS to obtain uplink/downlink channel state information; and updating the BWP configuration set and sending the BWP configuration set to the terminal according to the uplink/downlink channel state information, the service requirement of the terminal and the scheduling strategy.

Specifically, when the terminal is in the RRC connected state, the base station may configure full bandwidth BWP for the terminal through an RRC configuration message, and activate BWP configuration through the RRC configuration message. And then configuring the SRS and the CSI-RS by the base station for performing broadband and/or narrowband uplink/downlink channel quality measurement in a full bandwidth, and after obtaining uplink/downlink channel state information, the base station can update a BWP configuration set for the terminal by combining with the service requirement and the scheduling strategy of the terminal and also can include other factors in various aspects and send the BWP configuration set to the terminal. Wherein the set may include 1 to 4 BWPs configured for uplink/downlink of the terminal, a frequency domain start position and bandwidth corresponding to each BWP, a default BWP, and the like.

Step 202, starting a BWP configuration update flow according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set.

The terminal may determine the currently active BWP in the BWP configuration set after receiving the updated BWP configuration set after the base station configures the full bandwidth BWP for the terminal. The base station may start a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP.

The method for starting the BWP configuration update flow according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set includes three specific ways: the BWP configuration update procedure may be determined to be started according to the uplink channel quality information in the currently activated BWP, the BWP configuration update procedure may be determined to be started according to the downlink channel quality information in the currently activated BWP, or the BWP configuration update procedure may be determined to be started according to the uplink channel quality information and the downlink channel quality information in the currently activated BWP.

To describe the following three cases, respectively, for a scheme that determines to start the BWP configuration update procedure according to the uplink channel quality information, the step of starting the BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set includes: measuring the uplink channel quality of each sub-band in the currently activated BWP; comparing the uplink channel quality of each sub-band with the corresponding first uplink channel quality threshold value to obtain the number of the sub-bands of which the uplink channel quality is less than or equal to the first uplink channel quality threshold value; calculating a second ratio of the obtained number of sub-bands to the total number of sub-bands in the currently activated BWP; and if the second ratio is larger than or equal to a preset second sub-band channel quality deterioration ratio threshold value, starting a BWP configuration updating process.

The base station presets a first uplink channel quality threshold value and a second sub-band channel quality deterioration proportion threshold value. The first uplink channel quality threshold value is an uplink channel quality deterioration threshold value, and the second sub-band channel quality deterioration proportion threshold value is an uplink channel quality deterioration proportion threshold value. The base station measures the uplink channel quality of the currently active BWP, which may include at least one of CQI and SINR, but is not limited thereto. If the currently activated BWP is divided into a plurality of sub-bands, the base station measures and acquires the uplink channel quality of each sub-band in the currently activated BWP, then compares the uplink channel quality of each sub-band with a preset first uplink channel quality threshold value, counts the number of the sub-bands of which the uplink channel quality is less than or equal to the first uplink channel quality threshold value, and then calculates a second ratio of the counted number of the sub-bands to the total number of the sub-bands in the currently activated BWP. If the second ratio is greater than or equal to the preset second sub-band channel quality degradation ratio threshold value, the base station may determine to start the BWP configuration updating procedure, otherwise, the BWP updating procedure is not started.

By setting the first uplink channel quality threshold and the second sub-band channel quality deterioration ratio threshold, the base station can determine whether to start a BWP configuration updating process according to the uplink channel quality of each sub-band in the currently activated BWP, and can ensure that the updating process is started after the uplink channel quality configured by the current BWP reaches a certain degree.

When measuring the uplink channel quality of each sub-band in the currently activated BWP, the method comprises the following steps: and measuring the uplink channel quality of each sub-band in a preset second measurement window duration. By setting the duration of the second measurement window, the result within the measurement duration can be smoothed, and the robustness of the judgment is enhanced.

For the solution of determining to start the BWP configuration update procedure according to the downlink channel quality information, the step of starting the BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set includes: receiving terminal auxiliary information which is reported by a terminal based on the downlink channel quality of each sub-band in the currently activated BWP and carries a message whether to start a BWP configuration updating process; and when the terminal auxiliary information carries a message for starting the BWP configuration updating flow, starting the BWP configuration updating flow.

The terminal may determine whether to start the BWP configuration update procedure according to the downlink channel quality of each sub-band in the currently activated BWP, and may report the terminal auxiliary information carrying a message whether to start the BWP configuration update procedure to the base station after the terminal determines whether to start the BWP configuration update procedure according to the downlink channel quality of each sub-band in the currently activated BWP. For the terminal, a 1-bit field may be added to the terminal assistance information to indicate that the terminal determines whether to start the BWP configuration update procedure. Wherein, the value of the field is 0, which indicates that the terminal judges not to start the BWP configuration updating process; if the field value is 1, it indicates that the terminal determines to start the BWP configuration update process. And sending the terminal auxiliary information with the added fields to the base station so that the base station acquires the judgment result of the terminal.

After the base station receives the terminal auxiliary information reported by the terminal, the base station may start a BWP configuration update procedure when the terminal auxiliary information carries a BWP configuration update procedure start message.

For a scheme for determining to start a BWP configuration update procedure according to uplink channel quality and downlink channel quality information, a step of starting the BWP configuration update procedure according to uplink and/or downlink channel quality information in a currently activated BWP determined by a terminal in a BWP configuration set includes:

acquiring the number of sub-bands of which the uplink channel quality is less than or equal to a first uplink channel quality threshold value according to the uplink channel quality of each sub-band in the currently activated BWP and a corresponding first uplink channel quality threshold value, and calculating a second ratio of the acquired number of sub-bands to the total number of sub-bands in the currently activated BWP; receiving terminal auxiliary information which is reported by a terminal based on the downlink channel quality of each sub-band in the currently activated BWP and carries a message whether to start a BWP configuration updating process; and when the second ratio is greater than or equal to a preset second sub-band channel quality deterioration ratio threshold value and the terminal auxiliary information carries a message for starting a BWP configuration updating process, starting the BWP configuration updating process.

For the base station, the base station may preset a first uplink channel quality threshold and a second sub-band channel quality degradation ratio threshold. The base station measures and obtains the uplink channel quality of each sub-band in the currently activated BWP, then compares the uplink channel quality of each sub-band with a first uplink channel quality threshold value, counts the number of the sub-bands of which the uplink channel quality is less than or equal to the first uplink channel quality threshold value, and then calculates a second ratio of the counted number of the sub-bands to the total number of the sub-bands in the currently activated BWP.

For the terminal, the base station may determine whether to start the BWP configuration update procedure according to the downlink channel quality of each subband in the currently activated BWP, and after the terminal determines whether to start the BWP configuration update procedure, may send terminal assistance information carrying a message of whether to start the BWP configuration update procedure to the base station.

After obtaining the second ratio, the base station may compare the second ratio with a second sub-band channel quality degradation ratio threshold, and if the second ratio is greater than or equal to the second sub-band channel quality degradation ratio threshold, that is, the uplink channel quality degrades to a certain degree, and meanwhile, when the base station receives the terminal assistance information carrying the BWP configuration update procedure starting message sent by the terminal, the base station may start the BWP configuration update procedure.

By setting the first uplink channel quality threshold and the second sub-band channel quality degradation ratio threshold, the base station may determine whether to start the BWP configuration update procedure according to the uplink channel quality of each sub-band in the currently activated BWP and whether to receive the terminal auxiliary information carrying the BWP configuration update procedure start message sent by the terminal, which may ensure that the update procedure is started after the channel quality of the current BWP configuration reaches a certain degree. After the BWP configuration update flow is initiated, step 203 may be performed.

Step 203, configuring the target BWP for the terminal and sending the target BWP to the terminal.

After the base station starts the BWP configuration update procedure, the base station may configure the target BWP for the terminal and send the target BWP to the terminal, and the terminal receives the target BWP sent by the base station and accesses the target BWP.

The step of configuring a target BWP for the terminal and sending the target BWP to the terminal includes: activating a BWP (multicast broadcast protocol) different from a currently activated BWP (multicast broadcast protocol) in a plurality of RRC (radio resource control) connected state BWPs in a BWP configuration set configured for the terminal by sending downlink control information DCI (downlink control information) to the terminal, and controlling the currently activated BWP to be switched to a deactivated state; and if the uplink/downlink channel quality of the BWP activated by the base station meets a preset condition, determining the activated BWP as a target BWP.

If the BWP configuration set configured by the base station for the terminal includes multiple RRC connected BWPs (i.e. the number of configured BWPs is greater than 1), after the base station starts the BWP configuration update procedure, the base station preferentially changes the activated BWP to improve the channel quality of the BWP used by the terminal for transmission. That is, the base station may activate a BWP different from a currently activated BWP in a BWP configuration set configured for the terminal and deactivate the current BWP by sending a DCI message to the terminal, and if the uplink/downlink channel quality of the activated BWP meets a preset condition, the base station keeps the currently activated BWP for data transmission. When judging whether the uplink/downlink channel quality of the activated BWP meets the preset condition, the base station and the terminal may jointly determine, that is, the terminal determines the downlink channel quality, the base station determines the uplink channel quality, the terminal may obtain the determination result of the base station and the base station may obtain the determination result of the terminal, and then the base station determines whether the uplink/downlink channel quality of the activated BWP meets the preset condition. The meeting of the preset condition may be that the quality of the uplink/downlink channel is not deteriorated to a certain threshold, and may further include that the goodness of the quality of the uplink/downlink channel meets a certain condition. For the terminal, when the base station determines that the uplink/downlink channel quality of the activated BWP meets the preset condition and determines that the activated BWP is the target BWP, the terminal accesses the target BWP.

The step of configuring the target BWP for the terminal and sending the target BWP to the terminal further includes:

if the base station configures an RRC connection state BWP for the terminal in a BWP configuration set or configures a plurality of RRC connection state BWPs of which the uplink/downlink channel quality does not meet the preset condition, triggering the terminal to send a channel sounding reference signal SRS; receiving an SRS sent by a terminal, and acquiring the quality of a full-bandwidth uplink/downlink channel according to the SRS; and configuring a target BWP for the terminal and transmitting the target BWP to the terminal according to the quality of the full-bandwidth uplink/downlink channel, the service requirement of the terminal and the uplink/downlink data volume needing to be scheduled.

If the base station configures one RRC connected BWP for the terminal in the BWP configuration set or the base station configures multiple RRC connected BWPs (the number of BWPs is greater than 1) for the terminal in the BWP configuration set but the channel quality of each BWP does not meet the preset condition (if the degradation reaches a certain threshold), after the base station starts the BWP configuration update procedure, the base station may trigger the terminal to send an SRS, and after the terminal sends an SRS signal according to the trigger of the base station and the base station receives the SRS, the base station may obtain the full-bandwidth uplink/downlink channel quality information by configuring a full-bandwidth SRS or by traversing the full bandwidth with sub-band SRS. And then configuring a target BWP for the terminal and transmitting the target BWP to the terminal based on the full-bandwidth uplink/downlink channel quality information and the service requirement of the terminal and the amount of uplink/downlink data to be scheduled, including other factors.

The method for configuring the target BWP for the terminal and sending the BWP to the terminal according to the quality of the full-bandwidth uplink/downlink channel, the service requirement of the terminal and the uplink/downlink data volume needing to be scheduled comprises the following steps:

determining the number of BWPs configured for the terminal and the frequency domain bandwidth of each BWP according to the quality information of the full-bandwidth uplink/downlink channel, the service requirement of the terminal and the uplink/downlink data volume required to be scheduled; determining a sliding window comprising a continuous segment of physical resource blocks, PRBs, for the frequency domain bandwidth of each BWP; acquiring the number of sub-bands of which the uplink/downlink channel quality is greater than or equal to a preset uplink/downlink channel quality threshold value in at least one sliding window; and if the ratio of the acquired number of the sub-bands to the total number of the sub-bands in the corresponding sliding window is greater than or equal to a preset threshold value, determining the continuous PRBs of the segment as target BWPs and transmitting the target BWPs to the terminal.

First, the base station may obtain a preset uplink channel quality threshold, a preset downlink channel quality threshold, and a preset threshold. The preset uplink channel quality threshold value is different from the first uplink channel quality threshold value, and may be set to be the same according to the requirement, and the preset downlink channel quality threshold value is different from the first downlink channel quality threshold value, and may also be set to be the same according to the requirement. The preset uplink channel quality threshold value is a critical value with excellent uplink channel quality, the preset downlink channel quality threshold value is a critical value with excellent downlink channel quality, and the preset threshold value is a proportional critical value of uplink/downlink channel quality. The base station may determine the number (1 or more) of BWPs configured for the terminal and the frequency domain bandwidth of each BWP, according to the service requirement of the terminal, the amount of uplink/downlink data to be scheduled, and other factors.

Then, the base station may determine a sliding window comprising a continuous segment of PRBs for the frequency-domain bandwidth of each BWP; and acquiring the number of sub-bands of which the uplink/downlink channel quality is greater than or equal to a preset uplink/downlink channel quality threshold value in at least one sliding window. Specifically, the base station compares the uplink channel quality of each sub-band in at least one sliding window with a preset uplink channel quality threshold value, the terminal compares the downlink channel quality of each sub-band with a preset downlink channel quality threshold value, the base station obtains a comparison result, then counts the number of sub-bands of which the uplink channel quality is greater than or equal to the preset uplink channel quality threshold value and the downlink channel quality is greater than or equal to the preset downlink channel quality threshold value, then calculates the ratio of the counted number of sub-bands to the corresponding total number of sub-bands in the sliding window, and if the obtained ratio is greater than or equal to the preset threshold value, determines the continuous PRB as a target BWP and sends the target BWP to the terminal through an RRC reconfiguration message.

The number of the determined target BWPs is at least one, and when calculating the sliding window, the next sliding window may be calculated according to a preset order if the current sliding window does not satisfy the condition until at least one target BWP is obtained.

The bandwidth part BWP access method of the base station side in the embodiment of the invention can update BWP related configuration and activated BWP in time by fully utilizing uplink/downlink channel quality information of a corresponding terminal, ensure that the configured BWP better meets the channel state and transmission requirements of the terminal, ensure the data transmission performance and the power consumption performance of the terminal and ensure the user experience.

The following briefly introduces an embodiment of the present invention in a specific implementation flow, as shown in fig. 3, including:

step 301, after the terminal enters the RRC connected state, the base station configures a full bandwidth BWP for the terminal, obtains uplink/downlink channel state information, and updates a BWP configuration set for the terminal in combination with the terminal service requirement and the scheduling policy.

Step 302, after the terminal determines the currently activated BWP in the BWP configuration set, if the uplink and/or downlink channel status of the terminal in the currently activated BWP deteriorates to a certain extent, the base station starts the BWP configuration update process of the terminal.

It is determined to perform

step

303 or 305 according to the information of the RRC connected BWP configured by the base station.

Step 303, if the base station configures a plurality of RRC connected BWPs for the terminal in the BWP configuration set, the base station activates a BWP different from the currently activated BWP among the plurality of BWPs configured for the terminal.

Step 304, if the quality of the activated BWP uplink/downlink channel is not deteriorated to a certain extent, the base station keeps the currently activated BWP for data transmission. The terminal then accesses the BWP.

Step 305, if the base station configures one RRC connected BWP for the terminal in the BWP configuration set or the base station configures multiple RRC connected BWPs for the terminal but the channel quality of each BWP deteriorates to a certain extent, the base station configures the terminal to transmit an SRS signal to obtain the full-bandwidth uplink/downlink channel quality.

Step 306, the base station determines to update the BWP configuration for the terminal according to the quality of the acquired full-bandwidth uplink/downlink channel, the service requirement of the terminal, and the data volume of the uplink and downlink to be scheduled. The terminal may access the target BWP updated by the base station.

The above is the overall implementation flow of the embodiment of the present invention, and after configuring the full bandwidth BWP for the terminal and updating the BWP configuration set, the BWP configuration set is sent to the terminal; starting a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set; configuring a target BWP for a terminal and sending the target BWP to the terminal, updating the BWP related configuration and activated BWP in time by fully using the uplink/downlink channel quality information of the corresponding terminal, ensuring that the configured BWP better meets the channel state and transmission requirement of the terminal, ensuring the data transmission performance and the power consumption performance of the terminal and ensuring the user experience.

The access method of the bandwidth part BWP provided by the embodiment of the invention is suitable for updating the BWP configured in the RRC connection state, the base station acquires or provides the relevant channel state information by the terminal, the uplink and/or downlink channel state information is used as the basis for judging whether the BWP configuration updating process needs to be started, the base station can finally determine the BWP configuration and/or activated BWP suitable for the terminal according to the relevant information and by combining various factors such as service requirements, scheduling strategies and the like, and the BWP is indicated to the terminal, so that the data transmission performance and the power consumption performance of the terminal are ensured, and the user experience is ensured.

An embodiment of the present invention provides a terminal, as shown in fig. 4, the terminal includes a transceiver 410 and a processor 420, where the transceiver 410 is configured to: when the terminal is in a Radio Resource Control (RRC) connected state, receiving a BWP configuration set updated after a base station configures full-bandwidth BWP for the terminal, and determining the currently activated BWP in the BWP configuration set; the processor 420 is configured to: determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in a BWP currently activated by a terminal; the transceiver 410 is configured to: and the receiving base station configures the target BWP for the terminal after the BWP configuration updating process is started, and accesses the target BWP.

Wherein, when the terminal is in the RRC connected state, and the receiving base station receives the updated BWP configuration set after configuring the full-bandwidth BWP for the terminal, and determines the currently active BWP in the BWP configuration set, the transceiver 410 is further configured to:

The processor 420 is further configured to, when determining to start a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP of the terminal:

comparing the downlink channel quality of each sub-band with the corresponding first downlink channel quality threshold value to obtain the number of the sub-bands of which the downlink channel quality is less than or equal to the first downlink channel quality threshold value;

Wherein, when the processor 420 measures the downlink channel quality of each sub-band in the currently activated BWP, it is further configured to: and measuring the downlink channel quality of each sub-band in a preset first measurement window duration.

Wherein the transceiver 410 is further configured to: after the processor 420 determines whether to start the BWP configuration update procedure, it reports the terminal assistance information carrying the message whether to start the BWP configuration update procedure to the base station.

the control transceiver 410 receives notification information carrying a message for starting a BWP configuration update flow, which is sent by a base station based on the uplink channel quality of each sub-band in the currently activated BWP; determining to start a BWP configuration update flow according to the notification information.

acquiring the number of sub-bands of which the downlink channel quality is less than or equal to a first downlink channel quality threshold value according to the downlink channel quality of each sub-band in the currently activated BWP and a corresponding first downlink channel quality threshold value, and calculating a first ratio of the acquired number of sub-bands to the total number of sub-bands in the currently activated BWP;

the control transceiver 410 receives notification information carrying a message for starting a BWP configuration update flow, which is sent by a base station based on the uplink channel quality of each sub-band in the currently activated BWP;

The transceiver 410 is further configured to, when receiving a target BWP configured by the base station for the terminal after the BWP configuration update procedure is started, and accessing the target BWP:

if the base station configures a plurality of RRC connection state BWPs for the terminal in the BWP configuration set, after the BWP configuration updating process is started, receiving the BWP which is different from the current BWP and is activated by the base station in the plurality of RRC connection state BWPs;

and judging whether the uplink/downlink channel quality of the activated BWP meets a preset condition, if so, determining the activated BWP as a target BWP, and accessing the target BWP.

if the base station configures one RRC connection state BWP for the terminal in the BWP configuration set or the quality of uplink/downlink channels of a plurality of configured RRC connection state BWPs does not meet the preset condition, receiving the trigger information sent by the base station;

sending a channel Sounding Reference Signal (SRS) to a base station according to the trigger information;

and the receiving base station acquires the updated target BWP after the full-bandwidth uplink/downlink channel quality is acquired according to the SRS, and accesses the target BWP.

The terminal provided by the embodiment of the invention receives a BWP configuration set updated after a base station configures full-bandwidth BWP for the terminal when the terminal is in an RRC connected state, and determines the currently activated BWP in the BWP configuration set; determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP; the method comprises the steps that a target BWP configured for a terminal by a base station after a BWP configuration updating process is started is received, and the target BWP is accessed, so that the base station can update the BWP related configuration and activated BWP in time by fully utilizing uplink/downlink channel quality information of a corresponding terminal, the BWP configured by the base station better meets the channel state and transmission requirements of the terminal, the data transmission performance and the power consumption performance of the terminal are guaranteed, and the user experience is guaranteed.

An embodiment of the present invention provides a base station, as shown in fig. 5, the base station includes a processor 510 and a transceiver 520, where the transceiver 520 is configured to: when the terminal is in a Radio Resource Control (RRC) connected state, configuring a full bandwidth BWP for the terminal and updating a BWP configuration set, and then sending the BWP configuration set to the terminal; processor 510 is configured to: starting a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set; the transceiver 520 is configured to: and configuring the target BWP for the terminal and sending the target BWP to the terminal.

When the terminal is in the RRC connected state, configures the full bandwidth BWP for the terminal and updates the BWP configuration set, and then sends the BWP configuration set to the terminal, the transceiver 520 is further configured to:

and updating the BWP configuration set and sending the BWP configuration set to the terminal according to the uplink/downlink channel state information, the service requirement of the terminal and the scheduling strategy.

When the processor 510 starts a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set, the processor is further configured to:

comparing the uplink channel quality of each sub-band with the corresponding first uplink channel quality threshold value to obtain the number of the sub-bands of which the uplink channel quality is less than or equal to the first uplink channel quality threshold value;

and if the second ratio is larger than or equal to a preset second sub-band channel quality deterioration ratio threshold value, starting a BWP configuration updating process.

Wherein, when processor 510 measures the uplink channel quality of each sub-band in the currently activated BWP, it is further configured to:

the control transceiver 520 receives terminal auxiliary information that is reported by the terminal based on the downlink channel quality of each sub-band in the currently activated BWP and carries a message indicating whether to start a BWP configuration update procedure;

and when the terminal auxiliary information carries a message for starting the BWP configuration updating flow, starting the BWP configuration updating flow.

acquiring the number of sub-bands of which the uplink channel quality is less than or equal to a first uplink channel quality threshold value according to the uplink channel quality of each sub-band in the currently activated BWP and a corresponding first uplink channel quality threshold value, and calculating a second ratio of the acquired number of sub-bands to the total number of sub-bands in the currently activated BWP;

and when the second ratio is greater than or equal to a preset second sub-band channel quality deterioration ratio threshold value and the terminal auxiliary information carries a message for starting a BWP configuration updating process, starting the BWP configuration updating process.

Wherein, when the transceiver 520 configures the target BWP for the terminal and transmits the target BWP to the terminal, the transceiver is further configured to:

and if the uplink/downlink channel quality of the activated BWP meets a preset condition, determining the activated BWP as a target BWP.

if an RRC connected state BWP is configured for the terminal in a BWP configuration set or a plurality of RRC connected state BWPs of which the uplink/downlink channel quality does not meet preset conditions are configured, triggering the terminal to send a channel sounding reference signal SRS;

receiving an SRS sent by a terminal, and acquiring the quality of a full-bandwidth uplink/downlink channel according to the SRS;

and configuring a target BWP for the terminal and transmitting the target BWP to the terminal according to the quality of the full-bandwidth uplink/downlink channel, the service requirement of the terminal and the uplink/downlink data volume needing to be scheduled.

The transceiver 520 is further configured to, when configuring a target BWP for the terminal and transmitting the target BWP to the terminal according to the quality of the full-bandwidth uplink/downlink channel, the service requirement of the terminal, and the uplink/downlink data volume to be scheduled, further:

determining the number of BWPs configured for the terminal and the frequency domain bandwidth of each BWP according to the quality information of the full-bandwidth uplink/downlink channel, the service requirement of the terminal and the uplink/downlink data volume required to be scheduled;

and if the ratio of the acquired number of the sub-bands to the total number of the sub-bands in the corresponding sliding window is greater than or equal to a preset threshold value, determining the continuous PRBs of the segment as target BWPs and transmitting the target BWPs to the terminal.

The base station provided by the embodiment of the invention transmits the BWP configuration set to the terminal after configuring the full bandwidth BWP for the terminal and updating the BWP configuration set; starting a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set; configuring a target BWP for a terminal and sending the target BWP to the terminal, updating the BWP related configuration and activated BWP in time by fully using the uplink/downlink channel quality information of the corresponding terminal, ensuring that the configured BWP better meets the channel state and transmission requirement of the terminal, ensuring the data transmission performance and the power consumption performance of the terminal and ensuring the user experience.

The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the above-described access method of the bandwidth part BWP on the terminal side when executing the program.

Specifically, as shown in fig. 6, the terminal includes:

a processor 610 for reading programs in a memory 620;

a transceiver 630 for receiving and transmitting data under the control of the processor 610; and a user interface 640.

Wherein in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 610, and various circuits, represented by memory 620, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 630 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 in performing operations.

The processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 510 in performing operations.

In particular, the transceiver 630 is configured to: when the terminal is in a Radio Resource Control (RRC) connected state, receiving a BWP configuration set updated after a base station configures full-bandwidth BWP for the terminal, and determining the currently activated BWP in the BWP configuration set; the processor 610 is configured to: determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in a BWP currently activated by a terminal; the transceiver 630 is used for: and the receiving base station configures the target BWP for the terminal after the BWP configuration updating process is started, and accesses the target BWP.

The transceiver 630 and the processor 610 are further configured to perform other specific steps corresponding to the transceiver and the processor in the embodiment corresponding to fig. 4, which are not described herein again.

In this way, when the terminal is in the RRC connected state, the receiving base station configures the terminal with the BWP with the full bandwidth, and then determines the currently activated BWP in the BWP configuration set; determining to start a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP; the method comprises the steps that a target BWP configured for a terminal by a base station after a BWP configuration updating process is started is received, and the target BWP is accessed, so that the base station can update the BWP related configuration and activated BWP in time by fully utilizing uplink/downlink channel quality information of a corresponding terminal, the BWP configured by the base station better meets the channel state and transmission requirements of the terminal, the data transmission performance and the power consumption performance of the terminal are guaranteed, and the user experience is guaranteed.

The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor, when executing the program, implements the above-described access method of the bandwidth part BWP on the base station side.

Specifically, as shown in fig. 7, the base station includes:

a processor 710 for reading programs in the memory 720;

a transceiver 730 for receiving and transmitting data under the control of the processor 710.

Wherein in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 710, and various circuits, represented by memory 720, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 730 may be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 710 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 710 in performing operations.

The processor 710 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 710 in performing operations.

Specifically, the transceiver 730 is configured to: when the terminal is in a Radio Resource Control (RRC) connected state, configuring a full bandwidth BWP for the terminal and updating a BWP configuration set, and then sending the BWP configuration set to the terminal; the processor 710 is configured to: starting a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set; the transceiver 730 is configured to: and configuring the target BWP for the terminal and sending the target BWP to the terminal.

The transceiver 730 and the processor 710 are further configured to perform other specific steps corresponding to the transceiver and the processor in the embodiment corresponding to fig. 5, which are not described herein again.

In this way, after configuring the full bandwidth BWP for the terminal and updating the BWP configuration set, sending the BWP configuration set to the terminal; starting a BWP configuration updating process according to uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set; configuring a target BWP for a terminal and sending the target BWP to the terminal, updating the BWP related configuration and activated BWP in time by fully using the uplink/downlink channel quality information of the corresponding terminal, ensuring that the configured BWP better meets the channel state and transmission requirement of the terminal, ensuring the data transmission performance and the power consumption performance of the terminal and ensuring the user experience.

In addition, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the method for accessing the bandwidth portion BWP according to any of the above-mentioned embodiments.

Specifically, the computer-readable storage medium is applied to a terminal or a base station, and when the computer-readable storage medium is applied to the terminal or the base station, the steps performed in the access method for the bandwidth portion BWP corresponding to the terminal or the base station are described in detail above, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. An access method for bandwidth segment BWP, applied to a terminal, the method comprising:

2. The method according to claim 1, wherein the step of receiving the updated BWP configuration set updated by the base station after configuring full bandwidth BWP for the terminal while the terminal is in the RRC connected state, and determining the currently active BWP in the BWP configuration set comprises:

3. The method according to claim 1, wherein the step of determining to start a BWP configuration update procedure according to uplink and/or downlink channel quality information in the currently activated BWP of the terminal comprises:

4. The method of claim 3, wherein the step of measuring the downlink channel quality of each sub-band in the currently active BWP comprises:

5. The method of claim 3, further comprising:

and after the terminal determines whether to start the BWP configuration updating process, reporting terminal auxiliary information carrying a message whether to start the BWP configuration updating process to the base station.

6. The method according to claim 1, wherein the step of determining to start a BWP configuration update procedure according to uplink and/or downlink channel quality information in the currently activated BWP of the terminal comprises:

7. The method according to claim 1, wherein the step of determining to start a BWP configuration update procedure according to uplink and/or downlink channel quality information in the currently activated BWP of the terminal comprises:

8. The method according to claim 1, wherein the step of receiving the target BWP configured by the base station for the terminal after the BWP configuration update procedure is started, and accessing the target BWP comprises:

9. The method according to claim 1, wherein the step of receiving the target BWP configured by the base station for the terminal after the BWP configuration update procedure is started, and accessing the target BWP comprises:

10. An access method for bandwidth segment BWP, applied to a base station, the method comprising:

configuring a target BWP for the terminal and sending the BWP to the terminal.

11. The method according to claim 10, wherein the step of sending BWP configuration set to the terminal after configuring full bandwidth BWP for the terminal and updating BWP configuration set while the terminal is in RRC connected state comprises:

12. The method according to claim 10, wherein the step of starting a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set comprises:

13. The method of claim 12, wherein the step of measuring the upstream channel quality of each sub-band in the currently active BWP comprises:

14. The method according to claim 10, wherein the step of starting a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set comprises:

15. The method according to claim 10, wherein the step of starting a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set comprises:

16. The method according to claim 10, wherein the step of configuring the terminal with the target BWP and sending the target BWP to the terminal comprises:

17. The method according to claim 10, wherein the step of configuring the terminal with the target BWP and sending the target BWP to the terminal comprises:

18. The method according to claim 17, wherein the step of configuring a target BWP for the terminal and transmitting the target BWP to the terminal according to the full-bandwidth uplink/downlink channel quality and the traffic requirement of the terminal and the amount of uplink/downlink data to be scheduled comprises:

19. A terminal comprising a processor and a transceiver configured to:

20. The terminal of claim 19, wherein the transceiver is further configured to, when the terminal is in an RRC connected state, receive an updated BWP configuration set after a base station configures a full bandwidth BWP for the terminal, and determine a currently active BWP in the BWP configuration set:

21. The terminal of claim 19, wherein the processor, when determining to start a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP of the terminal, is further configured to:

22. The terminal of claim 21, wherein the processor, when measuring the downlink channel quality of each sub-band in the currently active BWP, is further configured to:

23. The terminal of claim 21, wherein the transceiver is further configured to:

24. The terminal of claim 19, wherein the processor, when determining to start a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP of the terminal, is further configured to:

25. The terminal of claim 19, wherein the processor, when determining to start a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP of the terminal, is further configured to:

26. The terminal of claim 19, wherein the transceiver, when receiving a target BWP configured by the base station for the terminal after a BWP configuration update procedure is started and accessing the target BWP, is further configured to:

27. The terminal of claim 19, wherein the transceiver, when receiving a target BWP configured by the base station for the terminal after a BWP configuration update procedure is started and accessing the target BWP, is further configured to:

28. A base station comprising a processor and a transceiver configured to:

29. The base station of claim 28, wherein the transceiver is further configured to, when the terminal is in an RRC connected state, configures a full bandwidth BWP for the terminal and updates a BWP configuration set, and sends the BWP configuration set to the terminal:

30. The base station of claim 28, wherein the processor is further configured to, when initiating a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set:

31. The base station of claim 30, wherein the processor, when measuring the uplink channel quality for each subband in the currently active BWP, is further configured to:

32. The base station of claim 28, wherein the processor is further configured to, when initiating a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set:

33. The base station of claim 28, wherein the processor is further configured to, when initiating a BWP configuration update procedure according to the uplink and/or downlink channel quality information in the currently activated BWP determined by the terminal in the BWP configuration set:

34. The base station of claim 28, wherein the transceiver, when configuring the target BWP for the terminal and transmitting to the terminal, is further configured to:

35. The base station of claim 28, wherein the transceiver, when configuring the target BWP for the terminal and transmitting to the terminal, is further configured to:

36. The base station of claim 35, wherein the transceiver is further configured to, when configuring and transmitting a target BWP for the terminal to the terminal according to the full-bandwidth uplink/downlink channel quality and the traffic demand of the terminal and the amount of data to be scheduled uplink/downlink, further:

37. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor, when executing the program, implements the steps in the method for accessing a bandwidth part BWP according to any of claims 1 to 9.

38. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor, when executing the program, implements the steps in the method for accessing a bandwidth part BWP according to any of claims 10 to 18.

39. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps in an access method for a bandwidth segment BWP according to any one of claims 1 to 9 or the steps in an access method for a bandwidth segment BWP according to any one of claims 10 to 18.