CN111818603B - Method, equipment and system for switching wave beams - Google Patents

Abstract

The application discloses a beam switching indication method, a device and a system, which are used for a multi-beam and multi-BWP mobile communication cell, wherein the method comprises the following steps: allocating one BWP per beam, each BWP for at least one beam; the corresponding relation between the N BWPs and the M beams means that the ith BWP is used for the jth beam, and the RRC common signaling contains the corresponding relation; and carrying out a random access process on a random access resource corresponding to the jth beam so as to switch the communication to the jth beam and the ith BWP. The application also comprises a terminal device, a network device and a mobile communication system using the method. The method and the device solve the problem of indication of beam switching in a different-frequency deployment scene by adopting different BWPs, and reduce switching time delay.

Description

Method, device and system for beam switching

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a beam switching indication method, device, and system.

Background technique

In NR systems such as non-terrestrial communication (NTN), a cell (PCI) can have multiple beams. If each beam of a cell uses the same carrier frequency, the bandwidth allocated to each beam is larger, but one Terminals with small beam coverage suffer from co-channel interference from adjacent beam signals. Therefore, different beams of a cell may use different carrier frequencies, for example, adjacent beams are allocated different bandwidth parts (Bandwidth Part, BWP) to avoid co-channel interference.

BWP is a measure taken to reduce the power consumption of the mobile phone in the 5G system, which refers to a subset of the entire bandwidth. For the same terminal, only one BWP can be activated in the uplink and downlink at the same time, and the terminal device performs data transmission and reception and PDCCH monitoring on this BWP.

When accessing the terminal equipment, the transmitting end transmits synchronization and broadcast signal blocks (SS/PBCH Block, SSB) on each beam. During data transmission, the sender sends the SSB on the initial BWP (BWP0), and then sends data to the terminal device on the dedicated BWP allocated to the terminal device.

In the prior art, the SSB and SIB corresponding to all beams are sent on the initial BWP (BWP0), and the initial access terminal first detects the SSB, reads the SIB and performs random access (RACH) on the BWP0, and after entering the RRC connection, sends the The terminal configures the BWP corresponding to the beam SSB to the terminal device.

During data transmission, the sender sends SSB/SIB on BWP0, and sends data to the terminal device on the allocated dedicated BWP.

There are mainly three ways of BWP handover: BWP handover based on higher layer signaling (RRC), BWP handover based on timer (Timer) and BWP handover based on downlink control information (DCI).

In the existing NR system, when beam switching is performed, the downlink control signaling can directly indicate new beam information and new BWP information when scheduling data. However, the uplink and downlink BWP handovers are separately indicated, that is, downlink control signaling is used to instruct the uplink BWP handover and the downlink BWP handover respectively, so that the BWPs after the terminal handover are not necessarily on the same BWP.

SUMMARY OF THE INVENTION

The present application proposes a beam switching method, device and system, which solves the problems of complex switching process, long time and low efficiency in the prior art that beam switching must be performed through high-level signaling. The present application is especially suitable for satellite communications.

In a first aspect, an embodiment of the present application provides a beam switching method, which is used in a multi-beam (TCI state) and multi-BWP mobile communication cell, including the following steps:

One BWP is allocated to each beam, and each BWP is used for at least one beam;

The correspondence between the N BWPs and the M beams means that the i-th BWP is used for the j-th beam, and the RRC public signaling includes the correspondence;

The random access procedure is implemented on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.

Preferably, the initial BWP corresponds to the M beams; the random access process is initiated on the initial BWP and random access resources corresponding to any one of the beams.

Preferably, the RRC signaling includes the dedicated BWP identifier of any terminal device.

The method described in any one of the embodiments of the first aspect of this application is applied to a network device, and includes the following steps: the network device sends the RRC public signaling, including the corresponding relationship; The corresponding random access resource receives the random access request and switches the communication to the jth beam and the ith BWP.

Preferably, the method described in any one of the embodiments of the first aspect of the present application is applied to a network device, further comprising the following steps: through the initial BWP, the network device receives the random access resource corresponding to any beam in the initial BWP, A random access request; the network device sends the RRC public signaling, including the dedicated BWP identifier corresponding to any terminal; establishes communication on the dedicated BWP and any one of the beams.

The method described in any one of the embodiments of the first aspect of this application is applied to a terminal device, and includes the following steps:

The terminal device detects and receives a synchronization signal at the initial BWP, initiates a random access process, and establishes communication on any beam;

The terminal device receives the RRC public signaling, and determines the corresponding relationship;

The terminal device initiates a random access procedure on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.

Preferably, the process of establishing communication on any beam of the terminal device further includes the following steps: the terminal device receives the RRC signaling and determines the dedicated BWP; the terminal device switches from the initial BWP to the dedicated BWP. BWP.

Preferably, the terminal device switches from any BWP to the initial BWP to send a random access request, so that the communication is switched to the jth beam and the ith BWP.

In a second aspect, the present application further proposes a network device, which is used in the method described in the first aspect of the present application. The network device is configured to: receive random access at an initial BWP and a random access resource corresponding to any beam Request, send the RRC public signaling, including the dedicated BWP identifier corresponding to any terminal; establish communication on the dedicated BWP and the any beam.

Preferably, the network device is further configured to: send the RRC public signaling, including the correspondence; receive a random access request at the random access resource corresponding to the jth beam, and switch the communication to the jth beam and the i-th BWP.

Further, the present application also proposes a network device, comprising: a memory, a processor, and a computer program stored on the memory and running on the processor, the computer program being implemented when executed by the processor Any one of the steps of the method described in the embodiments of the network device may be used.

In a third aspect, an embodiment of the present application further proposes a terminal device, which is used in the method described in any one of the embodiments of the present application. The terminal device is configured to: establish synchronization at the initial BWP, and at random The access resource sends a random access request, receives RRC signaling, and establishes communication on any one of the beams.

Further, the terminal device is further configured to: switch from the initial BWP to the dedicated BWP according to the dedicated BWP identifier included in the RRC signaling. .

Further, the terminal device is further configured to: receive the RRC public signaling and determine the corresponding relationship; initiate a random access process on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam. j beams and ith BWP.

An embodiment of the present application further proposes a terminal device, including: a memory, a processor, and a computer program stored on the memory and running on the processor, where the computer program is executed by the processor to realize the present invention Any one of the application can be used for the steps of the method described in the embodiment of the terminal device.

In a fourth aspect, the present application further provides a computer-readable medium, where a computer program is stored on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented.

In a fifth aspect, the present application further provides a mobile communication system, which includes at least one embodiment of any terminal device in the present application and at least one embodiment of any network device in the present application.

The above-mentioned at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

For the inter-frequency deployment scenario in which a cell has multiple beams and adjacent beams are sent in different BWPs, this patent is aimed at the inter-frequency deployment scenario in which a cell has multiple beams and adjacent beams are sent in different BWPs, and needs to be notified. The beam where the terminal is located and the BWP of the beam where the terminal is located, when the terminal needs beam switching, uses the terminal's autonomous uplink random access method to complete the beam switching.

The solution of the present application avoids high-level signaling overhead, realizes uplink and downlink beam switching at the same time, and improves beam switching efficiency.

The solution of the present application reduces the handover delay and avoids resource waste caused by inconsistent understandings between the base station and the terminal.

Especially, in the case of multiple beams in a cell in satellite communication, and in a system with multiple BWPs to achieve a frequency reuse factor greater than 1, beam switching is completed through random access, effectively avoiding frequent cell switching.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

Figure 1 is a schematic diagram of a multi-beam frequency reuse cell;

Fig. 2 is the embodiment flow chart of the method of the application;

FIG. 3 is a flowchart of an embodiment in which the method of the present application is applied to a network device;

FIG. 4 is a flowchart of an embodiment in which the method of the present application is applied to a terminal device;

5 is a schematic diagram of an embodiment of a network device;

6 is a schematic diagram of an embodiment of a terminal device;

FIG. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention;

FIG. 8 is a block diagram of a terminal device according to another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a cell with multi-beam frequency reuse. Each cell represents a beam; F0, F1, F2, F3 represent different BWPs. Regarding inter-frequency deployment, in the scenario of inter-frequency deployment, each BWP only corresponds to part of the beam. In the figure, different beams are represented by different grayscales. Among them, F0 is used for all beams; F1 is used for 4 beams, and F2 and F3 are used for 2 beams each. As a preferred embodiment, each beam includes a reference signal (CSI-RS) of downlink channel state information of corresponding multiple beams.

In systems such as non-terrestrial communications (NTN), a cell (PCI) can have multiple beams. For example, a cell has L largest SSB directions, which are distinguished by SSB indexes, and different beams transmit SSBs respectively. For the terminal equipment (UE) in the idle state (idle), only one SSB mapped to the PCI needs to be detected, which can realize fast and simple synchronization. To associate beams that meet the requirements, avoid packet transmission interruption and increased signaling overhead caused by cell handover. If each beam of a cell uses the same carrier frequency, the bandwidth allocated to each beam is larger, but a terminal with a small coverage of a beam will cause co-channel interference of signals sent on adjacent beams. In order to avoid co-channel interference, different beams of a cell can use different carrier frequencies. One way is to assign different BWPs to adjacent beams. As described in the background art, BWP is a measure used in the 5G system to reduce the power consumption of the mobile phone, and BWP refers to a subset of the entire bandwidth. For the same terminal, at any time, only one BWP can be activated in the uplink and the downlink, and the terminal device performs data transmission and reception and PDCCH monitoring on this BWP.

When the frequency reuse factor is greater than 1, the system bandwidth is divided into multiple BWPs, and each beam is sent on one BWP. The SSB and SIB corresponding to all beams are sent on the initial BWP (BWP0). The initial access terminal first detects the SSB, reads the SIB, and performs RACH access on the BWP0. After entering the RRC connection, the transmitter configures the BWP corresponding to the beam SSB. to the terminal device.

During data transmission, the sender sends SSB/SIB on BWP0, and sends data to the terminal device on the allocated BWP (eg, BWP2). For the terminal device in the RRC idle state (idle), it will measure the SSB on the BWP0 for beam switching. For the terminal device in the RRC connected state, if the bandwidth supported by the terminal is large, it needs to measure the BWP0 and the BWP2 allocated to itself at the same time. If the terminal device supports If the bandwidth is small, it is necessary to frequently switch to BWP0 for measurement, which is used for beam management.

This application includes a technical solution for terminal-autonomous beam switching, which involves RRC signaling configuration, synchronization, and design of random access resources. The technical solution of beam switching proposed in the present application is realized through the terminal equipment re-initiating the random access process instead of the signaling process, so that the uplink and downlink are switched to the new beam and the corresponding BWP at the same time; when the random access process is initiated Also different from the existing technology.

FIG. 2 is a flowchart of an embodiment of the method of the application.

An embodiment of the present application provides a beam switching indication method, which is used in a multi-beam (TCI state) and multi-BWP mobile communication cell, including the following steps:

Step 101: Corresponding multiple beams of a cell to multiple BWPs;

The system bandwidth is divided into multiple BWPs, and each beam is transmitted on one BWP. That is, one BWP is allocated to each beam, and each BWP is used for at least one beam.

For example, in FIG. 1 , a cell has 8 beams and 4 BWPs in total. BWPs are labeled F0, F1, F2, and F3, respectively. The number of beams is more than the number of BWPs, and each BWP is multiplexed by multiple cells. Among them, F0 is the initial BWP, which is applicable to all beams in the cell.

In other words, the system bandwidth is divided into N BWPs, and each BWP corresponds to M beams. The initial BWP (ie, BWP0) in the N BWPs is configured with CORESET#0, and the data indicated by the initial BWP further indicates the remaining system information (SIB1).

Step 102: Configure random access resources on the initial BWP, and the random access resources and beams have a binding relationship;

The uplink random access resource is configured on the initial BWP, and the uplink access resource is bound to the beam corresponding to the BWP. That is to say, the jth uplink access resource corresponds to the jth beam. In the application, j=1～M.

For example, the terminal searches the PSS and SSS for downlink synchronization, decodes the broadcast MIB information, and uses it to obtain the configuration of the control resource set CORESET#0 (initial CORESET), and further decodes the SIB1 information on the initial BWP to obtain the random access resources and Binding relationship of beams.

The location of the random access resource is determined by parameters in the time domain and frequency domain, and the M random access resources correspond to the M beams one-to-one, that is, the jth random access resource is used for the jth random access resource. beam. In the random access process implemented by the jth random access resource, the connection relationship is established on the jth beam.

Further, in steps 103 to 104, the terminal-specific BWP and/or the correspondence between each BWP and the beam is configured through RRC signaling.

Step 103, the high-level signaling configures the correspondence between the multiple BWPs and the multiple beams for the terminal;

The corresponding relationship is included in the RRC common signaling, and the corresponding relationship between the N BWPs and the M beams means that the i-th BWP is used for the j-th beam, and in this application, i=1˜N.

Step 104, configure the dedicated BWP of the terminal device through high-layer signaling;

Preferably, the RRC public signaling includes the dedicated BWP identifier of any terminal device.

Preferably, the initial BWP corresponds to the M beams; the terminal sends a random access request on the initial BWP and the random access resource corresponding to any beam (the first beam) according to the resources indicated by SIB1, and the base station sends a random access request on CORESET#0 In response to random access, the terminal sends an RRC connection request on the initial uplink BWP, and the base station sends an RRC connection establishment on CORESET#0, which is used to configure the dedicated BWP of the terminal device, for example, a maximum of 4 dedicated BWPs can be configured, and the first The dedicated BWP corresponding to the beam.

Step 105, beam measurement;

The terminal equipment performs beam measurement through CSI-RS to determine the beam to be switched. Preferably, the terminal equipment can measure the quality of all beams. All beams here refer to all beams in a cell; or all pre-defined beams in a cell. All the beams include beams using different BWPs.

As described in the background, terminals are assigned to dedicated BWPs. Since the beam where the dedicated BWP is located is only part of the beam, it is possible to measure multiple beams at the BWP0 by configuring the CSI-RS of all the beams at the BWP0. At this time, the terminal equipment needs to switch to BWP0 for measurement, which is used for beam management.

Since the beam where the dedicated BWP is located is only a partial beam, it is also possible to measure multiple beams at the BWP by configuring the CSI-RS of the multiple beams at the dedicated BWP.

For example, by configuring each BWP with CSI-RS for all beams used for beam management, the terminal device can measure the signal quality of all beams and determine the preferred beam (second beam). That is, in each BWP, the reference signals of downlink channel state information of multiple beams are configured, and the multiple beams include beams using different BWPs; preferably, the multiple beams include all beams in the cell. Therefore, the terminal can determine the preferred beam through measurement on any one of the allocated BWPs.

For another example, by configuring each BWP with CSI-RS of a partial beam used for beam management, the terminal device can measure the signal quality of multiple beams corresponding to the same BWP, and determine the preferred beam. As shown in FIG. 1 , CSI-RSs of multiple beams corresponding to the same BWP are configured in each BWP. Enables the terminal device to choose to switch to another beam using the same BWP.

Step 106: Switch beams through a random access procedure.

Preferably, the random access process is initiated on the initial BWP and random access resources corresponding to any beam. The random access procedure is implemented on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.

For example, when the terminal needs beam switching, it actively jumps to the initial BWP, initiates random access on the uplink random access resource bound to the preferred beam (second beam), and completes the beam switching.

That is to say, the terminal device determines the random access resource corresponding to the preferred beam according to the binding relationship between the random access resource and the beam; or the network device determines the random access resource corresponding to the preferred beam according to the binding relationship between the random access resource and the beam; the beam (second beam) corresponding to the random access resource.

It should be noted that the BWP switching of the existing NR system is independent of uplink and downlink. The downlink indicates the BWP of the scheduled data through the BWP indicator of DCI format 1_1, and the uplink indicates the scheduled data through the BWP indicator of DCI format 0_1. Therefore, the uplink and downlink BWPs are not necessarily the same BWP, so the newly designed beam switching process switches the uplink and downlink BWPs at the same time.

FIG. 3 is a flowchart of an embodiment in which the method of the present application is applied to a network device.

An embodiment in which the method described in this application is applied to a network device may include the following steps 201-206:

In step 201, the network device sends a synchronization signal and system information at the initial BWP indicated by the initial CORESET to realize synchronization and transmit initial configuration information (CORESET#0);

The terminal initiates random access after initial BWP synchronization, and the RRC signaling needs to be configured for the terminal-specific BWP, and/or the beam corresponding to each BWP. Add the dedicated BWP identifier configured to the terminal and/or M beams related to N BWPs in the RRC public signaling, indicating the beam information associated with each BWP, as detailed in steps 202 to 205:

Step 202: The network device configures uplink random access resources on the initial BWP, and the random access resources are bound to the beam;

For example, the indication on the configuration of random access resources in SIB signaling includes the binding relationship between random access resources and beams.

Step 203, the network device receives the random access request in the uplink random access resource, and establishes a connection with the terminal device;

The network device receives the random access request at the initial BWP and the random access resource corresponding to any beam;

The network device further determines the beam according to the binding relationship between the random access resource and the beam, and the uplink beam and the downlink beam are the same, for example, the first beam.

Step 204, the network device sends RRC public signaling to determine the correspondence between multiple BWPs and multiple beams;

The network device sends the RRC common signaling at the initial BWP, and the RRC common signaling further includes the correspondence between the N BWPs and the M beams; the correspondence means that the i th BWP is used for the j th beam.

Step 205, the network device sends RRC public signaling for configuring at least one dedicated BWP dedicated to the terminal device, and activating one dedicated BWP; the activated dedicated BWP corresponds to the first beam;

For example, the network device sends the RRC public signaling in the initial BWP (BWP0), including the dedicated BWP identifier corresponding to any terminal;

That is, through steps 203 to 205, through the initial BWP, the network device receives a random access request at the random access resource corresponding to any beam (the first beam). For any terminal, this beam (the first beam) A beam) has a corresponding relationship with the dedicated BWP of the terminal, and the network device sends the RRC public signaling, including the dedicated BWP identifier corresponding to any terminal; in this way, the terminal can be switched from the initial BWP to the dedicated BWP. Communication is established between the BWP and any one of the beams.

Step 206, the network device receives the random access request on the uplink random access resource, and establishes a new connection with the terminal device;

When receiving the random access request again, the network device further determines a beam according to the binding relationship between the random access resource and the beam, and the uplink beam and the downlink beam are the same, for example, the second beam.

For example, the network device receives the random access request at the random access resource corresponding to the jth beam, and switches the communication to the jth beam and the ith BWP.

FIG. 4 is a flowchart of an embodiment in which the method of the present application is applied to a terminal device.

An embodiment in which the method described in this application is applied to a terminal device may include the following steps 301 to 307:

Step 301, the terminal device detects and receives a synchronization signal at the initial BWP, and obtains configuration information;

For example, the terminal searches for PSS and SSS for downlink synchronization, decodes broadcast MIB information for obtaining the configuration of CORSET#0, and decodes SIB1 information on the indicated initial BWP.

After the terminal device successfully detects the synchronization signal on the initial BWP, it receives the main system information (MIB) carried by the physical broadcast channel, and the main system information indicates an information set to the terminal device. Subcarrier spacing of PDCCH/PDSCH.

Step 302, the terminal device receives the binding relationship between the random access resource and the beam on the initial BWP;

For example, the indication on the configuration of random access resources in SIB signaling includes the binding relationship between random access resources and beams.

Step 303: The terminal device initiates a random access procedure on the random access resource corresponding to any beam (the first beam), and establishes a connection with the network device;

The terminal sends a random access request on the initial BWP according to the resources indicated by SIB1, the base station sends a random access response on CORSET#0, the terminal sends an RRC connection request on the initial uplink BWP, and the base station sends an RRC connection establishment on CORSET#0.

Step 304, the terminal device receives the RRC public signaling, and determines the corresponding relationship;

The beam identifier corresponding to the BWP identifier is added to the BWP public signaling.

The terminal device receives the RRC common signaling, and the RRC common signaling further includes the correspondence between the N BWPs and the M beams; the correspondence means that the ith BWP is used for the j th beam.

Step 305: The terminal device receives the RRC public signaling and determines a dedicated BWP; the dedicated BWP corresponds to the first beam.

Preferably, the process of establishing communication on any beam of the terminal device further includes the following steps: the terminal device receives the RRC public signaling at the initial BWP, and determines the dedicated BWP; the terminal device receives the RRC public signaling at the initial BWP; Switch from initial BWP to dedicated BWP.

In the following steps 306 to 307, when the terminal needs to perform beam switching, it finds a new beam measured by the terminal, initiates random access on the uplink random access resource bound to the new beam in the initial BWP, and completes the beam switching.

Step 306: The terminal device performs beam measurement to determine the target beam (second beam) to be switched;

The terminal equipment performs beam measurement through CSI-RS to determine the beam to be switched. Preferably, the terminal equipment can measure the quality of all beams. All beams here refer to all beams in a cell, or all beams of multiple pre-designated beams in a cell. Among all the beams, beams using different BWPs are included.

The measurement of multiple beams at BWP0 can be achieved by configuring CSI-RS of all beams at BWP0. At this time, the terminal equipment needs to switch to BWP0 for measurement, which is used for beam management.

Since the beam where the dedicated BWP is located is only a part of the beam, it is also possible to measure multiple beams at the dedicated BWP by configuring CSI-RS of multiple beams (or all beams) at the dedicated BWP.

Step 307: The terminal device sends a random access request on the random access resource corresponding to the second beam to establish a new connection.

For example, the terminal device initiates a random access procedure on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.

Preferably, the terminal device switches from any BWP to the initial BWP to send a random access request, so that the communication is switched to the jth beam and the ith BWP.

FIG. 5 is a schematic diagram of an embodiment of a network device.

An embodiment of the present application further proposes a network device, using the method of any one of the embodiments of the present application, the network device is configured to: send the RRC public signaling; correspond to any beam that has a corresponding relationship with the dedicated BWP The random access resource of the device receives a random access request, and establishes communication on the dedicated BWP and any one of the beams.

Preferably, the network device is configured to: receive a random access request at the initial BWP and the random access resource corresponding to any beam, and the network device sends the RRC public signaling, including the dedicated BWP corresponding to any terminal identification; establish communication on the dedicated BWP and the arbitrary beam.

Preferably, the network device is further configured to: send RRC public signaling for determining the correspondence between multiple BWPs and multiple beams; receive a random access request at the random access resource corresponding to the jth beam, so that the communication Switch to the jth beam and the ith BWP.

To implement the above technical solutions, a network device 400 proposed in this application includes a network sending module 401 , a network determining module 402 , and a network receiving module 403 .

The network sending module is configured to send the configuration information CORESET, higher layer signaling (RRC common signaling), SSB (including PSS and SSS), SIB and MIB.

The network determination module is used to determine the dedicated BWP, and is also used to determine the corresponding relationship between the N BWPs and the M beams; it is also used to determine the binding relationship between random access resources and beams; and is also determined according to the binding relationship. The beam corresponding to the random access resource occupied by the random access request.

The network receiving module is further configured to receive a random access request.

The specific methods for realizing the functions of the network sending module, the network determining module, and the network receiving module are as described in the method embodiments shown in FIGS. 1 to 4 of the present application, and will not be repeated here.

FIG. 6 is a schematic diagram of an embodiment of a terminal device.

The present application also proposes a terminal device, using the method of any one of the embodiments of the present application, the terminal device is configured to establish synchronization at the initial BWP, and send a random access request on the random access resource corresponding to any beam, Receive RRC signaling, and establish communication on any one of the beams.

Further, the terminal device is further configured to: switch from the initial BWP to the dedicated BWP according to the dedicated BWP identifier included in the RRC signaling.

Further, the terminal device is further configured to: receive the RRC public signaling and determine the corresponding relationship; initiate a random access process on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam. j beams and ith BWP.

To implement the above technical solutions, a terminal device 500 proposed in this application includes a terminal sending module 501 , a terminal determining module 502 , and a terminal receiving module 503 .

The terminal receiving module is used to receive the high-level signaling, and is also used to receive CORESET, SSB (including PSS and SSS), SIB, MIB, etc. from network equipment; further, it is also used to receive the CSI of each beam -RS.

The terminal determining module is used to determine the terminal-specific BWP according to the high-layer signaling, and is also used to determine the correspondence between the N BWPs and the M beams according to the high-layer signaling; and is also used to determine random access according to system information. The binding relationship between the incoming resources and the beam is also used to determine the optimal beam according to the CSI-RS, and also determine the random access resource corresponding to the optimal beam according to the binding relationship.

The terminal sending module is configured to send the random access request and the RRC connection request.

The specific methods for realizing the functions of the terminal sending module, the terminal determining module, and the terminal receiving module are described in the method embodiments shown in Figs.

The terminal device mentioned in this application may refer to a mobile terminal device.

FIG. 7 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown in FIG. 7 , the network device 600 includes a processor 601 , a wireless interface 602 , and a memory 603 . Among other things, the wireless interface may be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices over a transmission medium. The wireless interface realizes the communication function with the terminal equipment, and processes wireless signals through the receiving and transmitting device, and the data carried by the signals communicates with the memory or the processor via an internal bus structure. The memory 603 contains a computer program for executing any one of the embodiments of FIGS. 1 to 4 of the present application, and the computer program is executed or changed on the processor 601 . When the memory, the processor, and the wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus and a status signal bus, which will not be repeated here.

FIG. 8 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 shown in FIG. 8 includes at least one processor 701 , memory 702 , user interface 703 and at least one network interface 704 . The various components in the terminal device 700 are coupled together by a bus system. The bus system is used to realize the connection communication between these components. The bus system includes data bus, power bus, control bus and status signal bus.

User interface 703 may include a display, keyboard, or pointing device, such as a mouse, trackball, touch pad or touch screen, and the like.

Memory 702 stores executable modules or data structures. An operating system and application programs may be stored in the memory. Among them, the operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. Applications include various applications, such as media players, browsers, etc., for implementing various application services.

In this embodiment of the present invention, the memory 702 includes a computer program for executing any one of the embodiments in FIGS. 1 to 3 of the present application, and the computer program is executed or changed on the processor 701 .

The memory 702 includes a computer-readable storage medium, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 701, each step of the method embodiment described in any one of the foregoing embodiments in FIG. 1 to 4 is implemented.

The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method of the present application may be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in the form of software. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. In a typical configuration, the apparatus of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and memory.

Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

Therefore, the present application further provides a computer-readable medium, where a computer program is stored on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented. For example, the memory 603, 702 of the present invention may comprise non-persistent memory in a computer readable medium, in the form of random access memory (RAM) and/or non-volatile memory, such as read only memory (ROM) or flash memory ( flash RAM).

Computer-readable media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology. Information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

Based on the embodiments of FIGS. 5 to 8 , the present application further proposes a mobile communication system, including at least one embodiment of any terminal device in the present application and at least one embodiment of any network device in the present application.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

It should also be noted that the "first" and "second" in this application are used to distinguish multiple objects with the same name, and have no other special meaning unless specifically stated.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (17)

1. A method for beam switching, which is used for a mobile communication cell of multiple beams and multiple BWPs, is characterized in that, comprising the following steps: One BWP is allocated to each beam, and each BWP is used for at least one beam; Configure random access resources on the initial BWP, and the random access resources and beams have a binding relationship: the jth uplink access resource corresponds to the jth beam, and j=1～M; The correspondence between the N BWPs and the M beams means that the i-th BWP is used for the j-th beam, i=1 to N, and the RRC common signaling includes the correspondence; Establish communication on dedicated BWP and either beam; The random access procedure is implemented on the initial BWP and the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP. 2. The method of claim 1, wherein the initial BWP corresponds to the M beams; The random access procedure is initiated on the initial BWP and the random access resource corresponding to any beam. 3. The method of claim 1, wherein The RRC signaling includes the dedicated BWP identifier of any terminal device. 4. The method according to any one of claims 1 to 3, which is used in a network device, characterized in that it comprises the following steps: The network device sends the RRC public signaling, including the corresponding relationship; The network device receives the random access request at the random access resource corresponding to the jth beam, and switches the communication to the jth beam and the ith BWP. 5. The method of claim 4, further comprising the steps of: The network device receives the random access request at the initial BWP and the random access resource corresponding to any beam; The network device sends the RRC public signaling, including the dedicated BWP identifier corresponding to any terminal; Communication is established on the dedicated BWP and either beam. 6. The method according to any one of claims 1 to 3, which is used in a terminal device, characterized in that it comprises the following steps: The terminal device detects and receives a synchronization signal at the initial BWP, initiates a random access process, and establishes communication on any beam; The terminal device receives the RRC public signaling, and determines the corresponding relationship; The terminal device initiates a random access procedure on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP. 7. The method of claim 6, further comprising the steps of: The terminal device receives the RRC public signaling, and determines the dedicated BWP; The terminal device switches from the initial BWP to the dedicated BWP. 8. The method of claim 6, wherein The terminal device switches from any BWP to the initial BWP and sends a random access request, so that the communication is switched to the jth beam and the ith BWP. 9. A network device, using the method according to any one of claims 1 to 5, wherein the network device is used to: Receive a random access request at the initial BWP and the random access resource corresponding to any beam; send the RRC public signaling, including the dedicated BWP identifier corresponding to any terminal; on the dedicated BWP and any beam Establish communication. 10. The network device according to claim 9, wherein the network device is further configured to: The random access request is received at the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP. 11. A network device, comprising: a memory, a processor, and a computer program stored on the memory and running on the processor, the computer program being executed by the processor to achieve the following: The steps of the method of any one of claims 1-5. 12. A terminal device, using the method according to any one of claims 1 to 3 and 6 to 8, wherein the terminal device is used to: Synchronization is established at the initial BWP, a random access request is sent on the random access resource corresponding to any beam, RRC signaling is received, and communication is established on the any beam. 13. The terminal device according to claim 12, wherein the terminal device is further configured to: Switch from the initial BWP to the dedicated BWP according to the dedicated BWP identifier included in the RRC signaling. 14. The terminal device according to claim 12, wherein the terminal device is further configured to: A random access procedure is initiated on the random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP. 15. A terminal device, characterized in that it comprises: a memory, a processor, and a computer program stored on the memory and running on the processor, the computer program being executed by the processor to achieve the following: Steps of the method described in any one of claims 1-3 and 6-8. 16. A mobile communication system, comprising at least one network device according to any one of claims 9-11 and at least one terminal device according to any one of claims 12-15. 17. A computer-readable medium on which a computer program is stored, the computer program implementing the steps of the method according to any one of claims 1 to 8 when the computer program is executed by a processor.

Images