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

Method, equipment and system for switching wave beams Download PDF

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CN111818603B
CN111818603B CN202010565706.8A CN202010565706A CN111818603B CN 111818603 B CN111818603 B CN 111818603B CN 202010565706 A CN202010565706 A CN 202010565706A CN 111818603 B CN111818603 B CN 111818603B
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bwp
random access
jth
terminal device
terminal
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CN111818603A (en
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焦慧颖
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

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, equipment and system for switching wave beams
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a method, a device, and a system for indicating beam switching.
Background
In NR systems such as non-terrestrial communication (NTN), a cell (PCI) may have a plurality of beams, each beam of a cell, if using the same carrier frequency, is allocated with a larger bandwidth, but a terminal with a small beam coverage suffers from co-channel interference of adjacent beam signals. Different beams of a cell may use different carrier frequencies, e.g. adjacent beams are allocated different Bandwidth parts (BWPs) to avoid co-channel interference.
BWP is a measure taken in 5G systems to reduce power consumption at the mobile end, and refers to a subset of the total bandwidth. For the same terminal, only one BWP can be activated at the same time in uplink and downlink, and the terminal device performs data transceiving and PDCCH monitoring on the BWP.
Upon accessing a terminal device, a transmitting end transmits a synchronization and broadcast signal Block (SS/PBCH Block, SSB) on each beam. During data transmission, the sender transmits SSBs on an initial BWP (BWP0) and then transmits data to the end device on a dedicated BWP assigned to the end device.
In the prior art, wherein SSBs and SIBs corresponding to all beams are transmitted on an initial BWP (BWP0), an initial access terminal first detects the SSBs, reads the SIBs and performs Random Access (RACH) on BWP0, and after entering RRC connection, a transmitting end configures the BWP corresponding to the beam SSBs to a terminal device.
During data transmission, the sender sends the SSB/SIB on BWP0 and sends the data to the terminal device on the allocated dedicated BWP.
There are three main ways for BWP switching: 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 performing beam switching, the downlink control signaling may directly indicate new beam information and new BWP information when scheduling data. However, the uplink and downlink BWP handover are separately indicated, i.e. there is downlink control signaling for indicating uplink BWP handover and downlink BWP handover, respectively, so that the BWP after terminal handover is not necessarily on the same BWP.
Disclosure of Invention
The application provides a beam switching method, device and system, which solve the problems that the prior art needs to switch beams through high-level signaling, the switching process is complex, the time is long and the efficiency is low.
In a first aspect, an embodiment of the present application provides a beam switching method, for a multi-beam (TCI state) multi BWP mobile communication cell, including the following steps:
allocating one BWP per beam, one BWP for each beam at least;
the corresponding relation between the N BWPs and the M wave beams means that the ith BWP is used for the jth wave 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.
Preferably, the initial BWP corresponds to the M beams; and initiating a random access process on the random access resource corresponding to the initial BWP and any beam.
Preferably, the RRC signaling contains a dedicated BWP identity of any one terminal device.
The method according to any one of the embodiments of the first aspect of the present application is applied to a network device, and includes the following steps: the network equipment sends the RRC public signaling containing the corresponding relation; and the network equipment receives a random access request at a random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.
Preferably, the method according to any one of the embodiments of the first aspect of the present application is applied to a network device, and further includes the following steps: the network device receives a random access request at an initial BWP and a random access resource corresponding to any beam through the initial BWP; the network equipment sends the RRC public signaling, which contains a special BWP identifier corresponding to any terminal; establishing communication on the dedicated BWP and the any one beam.
The method described in any one embodiment of the first aspect of the present application is applied to a terminal device, and includes the following steps:
the terminal equipment detects and receives a synchronous signal and initiates a random access process at the initial BWP, and establishes communication on any beam;
the terminal equipment receives the RRC public signaling and determines the corresponding relation;
and the terminal equipment initiates a random access process on the random access resource corresponding to the jth wave beam so as to switch the communication to the jth wave beam and the ith BWP.
Preferably, the terminal device, in the process of establishing communication on any beam, 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.
Preferably, the terminal device switches from any one BWP to the initial BWP to send a random access request, so that the communication is switched to the jth beam and ith BWP.
In a second aspect, the present application further proposes a network device, configured to perform the method of the first aspect of the present application, where the network device is configured to: receiving a random access request at an initial BWP and a random access resource corresponding to any beam, and sending the RRC common signaling which comprises a special BWP identification corresponding to any terminal; establishing communication on the dedicated BWP and the any one beam.
Preferably, the network device is further configured to: sending the RRC common signaling, including the corresponding relation; and receiving a random access request at a random access resource corresponding to the jth beam, and switching the communication to the jth beam and the ith BWP.
Further, the present application also provides a network device, including: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of any one of the embodiments usable for a network device.
In a third aspect, an embodiment of the present application further provides a terminal device, configured to implement the method in any embodiment of the present application, where the terminal device is configured to: and establishing synchronization in the initial BWP, sending a random access request in a random access resource corresponding to any beam, receiving RRC signaling, and establishing communication on any beam.
Further, the terminal device is further configured to: switching from the initial BWP to the dedicated BWP according to a dedicated BWP identification contained in the RRC signaling. .
Further, the terminal device is further configured to: receiving the RRC common signaling and determining the corresponding relation; and initiating a random access process on a random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.
An embodiment of the present application further provides a terminal device, including: the terminal device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the steps of the method of any one embodiment of the application which can be used for the terminal device when being executed by the processor.
In a fourth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application.
In a fifth aspect, the present application further provides a mobile communication system, which includes at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
aiming at a pilot frequency deployment scene that a cell has a plurality of beams and adjacent beams are sent in different BWPs, the patent discloses a pilot frequency deployment scene that a cell has a plurality of beams and adjacent beams are sent in different BWPs, a beam where a terminal is located and the BWP of the beam where the terminal is located need to be informed, and when the terminal needs to switch the beams, the beam switching is completed by adopting a mode of autonomous uplink random access of the terminal.
The scheme of the application avoids high-level signaling overhead, simultaneously realizes uplink and downlink beam switching, and improves beam switching efficiency.
The scheme of the application reduces switching time delay and avoids resource waste caused by inconsistent understanding of the base station and the terminal.
Especially, in the case of multiple beams in a cell in satellite communication and in a system using multiple BWPs to achieve a frequency reuse factor greater than 1, beam switching is accomplished by random access, which effectively avoids frequent cell switching.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
figure 1 is a schematic diagram of a multi-beam frequency multiplexed cell;
FIG. 2 is a flow chart of an embodiment of the method of the present application;
FIG. 3 is a flow chart of an embodiment of a method of the present application for a network device;
FIG. 4 is a flowchart of an embodiment of a method of the present application for a terminal device;
FIG. 5 is a schematic diagram of an embodiment of a network device;
FIG. 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 of another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. 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 application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a multi-beam frequency reuse cell. Each cell represents a beam; f0, F1, F2, F3 represent different BWPs. With respect to inter-frequency deployment, each BWP corresponds to only a partial beam if in the scenario of inter-frequency deployment. In the figure, different beams are represented by different gray scales. Where F0 is used for all beams; f1 for 4 beams, F2, F3 for 2 beams each. As a preferred embodiment, each beam includes a reference signal (CSI-RS) of downlink channel state information of the corresponding plurality of beams.
In non-terrestrial communication (NTN) systems, etc., a cell (PCI) may have multiple beams. For example, a cell has L largest SSB directions distinguished by SSB indices, and different beams each transmit an SSB. For idle state (idle) terminal equipment (UE), only one SSB mapped to the PCI needs to be detected, and quick and simple synchronization can be realized. Each beam of a cell, if using the same carrier frequency, has a larger bandwidth allocated to it, but a terminal with a small beam coverage will cause co-channel interference of the signals transmitted on adjacent beams. To avoid co-channel interference, different beams of a cell may use different carrier frequencies, one way being that adjacent beams are assigned different BWPs. As described in the background, BWP is a measure used in 5G systems to reduce power consumption at the mobile phone end, and BWP refers to a subset of the total bandwidth. For the same terminal, at any one time, only one BWP can be activated for uplink and downlink, and the terminal device performs data transceiving and PDCCH monitoring on the BWP.
When the frequency reuse factor is greater than 1, the system bandwidth is divided into a plurality of BWPs, each beam being transmitted on one BWP. Wherein, the initial BWP (BWP0) sends the SSBs and SIBs corresponding to all beams, the initial access terminal first detects the SSBs, reads the SIBs and performs RACH access on BWP0, and after entering RRC connection, the sending end configures the BWP corresponding to the beam SSBs to the terminal device.
During data transmission, the sender transmits SSB/SIBs on BWP0 and transmits data to the end device on the assigned BWP (e.g., BWP 2). For the terminal device in the RRC idle state (idle), SSB is measured on BWP0 for beam switching, and for the terminal in the RRC connected state, if the bandwidth supported by the terminal is large, BWP0 and BWP2 allocated to the terminal device need to be measured simultaneously, and if the bandwidth supported by the terminal device is small, the terminal device needs to switch to BWP0 frequently for beam management.
The application comprises a technical scheme of autonomous beam switching of a terminal, and relates to RRC signaling configuration, synchronization and design of random access resources. The technical scheme of beam switching provided by the application is realized by restarting a random access process by the terminal equipment instead of a signaling process, so that uplink and downlink are switched to a new beam and a corresponding BWP at the same time; the timing of the initiation of the random access procedure is also different from the prior art.
Fig. 2 is a flowchart of an embodiment of the method of the present application.
The embodiment of the present application provides a beam switching indication method, which is used for a multi-beam (TCI state) and multi-BWP mobile communication cell, and includes the following steps:
step 101, corresponding a plurality of beams of a cell with a plurality of BWPs;
the system bandwidth is divided into a plurality of BWPs, with each beam being transmitted on one BWP. That is, one BWP is allocated per beam, one BWP for at least one beam.
For example, in fig. 1, there are 8 beams and 4 BWPs in a cell. BWPs are labeled F0, F1, F2, and F3, respectively. The number of beams is greater than the number of BWPs, each of which is multiplexed by multiple cells. Where F0 is the initial BWP, applicable to all beams in the cell.
Or, the system bandwidth is divided into N BWPs, each BWP corresponding to M beams. Wherein an initial BWP (i.e., BWP0) of the N BWPs configures CORESET #0, which indicates data further indicating remaining system information (SIB 1).
Step 102, configuring a random access resource on an initial BWP, wherein the random access resource and a beam have a binding relationship;
and configuring uplink random access resources on the initial BWP, where the uplink random access resources and the beam corresponding to the BWP have a binding relationship, that is, the jth uplink access resource corresponds to the jth beam, and j is 1 to M in this application.
For example, the terminal searches PSS and SSS for downlink synchronization, decodes broadcast MIB information, obtains configuration of a control resource set, CORESET #0 (initial CORESET), and further decodes SIB1 information on initial BWP to obtain the binding relationship between the random access resource and the beam.
The position of the random access resource is determined by the parameters of time domain and frequency domain, and the M random access resources are in one-to-one correspondence with the M beams, that is, the jth random access resource is used for the jth beam. In the random access process implemented in the jth random access resource, the connection relationship is established in the jth beam.
Further, in steps 103-104, configuring the terminal-specific BWP and/or the corresponding relation between each BWP and the beam through RRC signaling.
103, configuring the corresponding relation between the plurality of BWPs and the plurality of beams for the terminal by the high-level signaling;
the RRC common signaling includes the correspondence relationship, and the correspondence relationship between the N BWPs and the M beams means that the ith BWP is used for the jth beam, where i is 1 to N in this application.
Step 104, configuring the special BWP of the terminal equipment through high-level signaling;
preferably, the RRC common signaling contains a dedicated BWP identity of any one terminal device.
Preferably, the initial BWP corresponds to the M beams; the terminal sends a random access request on a random access resource corresponding to an initial BWP and any one beam (a first beam) according to the resource indicated by SIB1, the base station sends a random access response on CORESET #0, the terminal sends an RRC connection request on an initial uplink BWP, and the base station sends an RRC connection setup on CORESET #0, which is used to configure a dedicated BWP of the terminal device, for example, up to 4 dedicated BWPs can be configured, and activate a dedicated BWP corresponding to the first beam.
Step 105, beam measurement;
and the terminal equipment performs beam measurement through the CSI-RS and determines a beam to be switched. Preferably, the terminal device is capable of measuring the quality of all beams. All beams herein refer to all beams within a cell; or all predefined beams within a cell. The beams using different BWPs are included in all the beams.
As described in the background, a terminal is assigned to a dedicated BWP. Since the dedicated BWP is located in only partial beam, measuring multiple beams in BWP0 can be implemented by configuring CSI-RS of all beams in BWP 0. At this point, the terminal device is required to switch to BWP0 for measurement for beam management.
Since the beam where the dedicated BWP is located is only a partial beam, measuring multiple beams at BWP can also be achieved by configuring CSI-RS of multiple beams at the dedicated BWP.
For example, by configuring each BWP with CSI-RSs for all beams used for beam management, the terminal device can measure the signal quality of all beams, determining the preferred beam (second beam). That is, at each BWP, reference signals of downlink channel state information of a plurality of beams including beams using different BWPs are configured; optimally, the plurality of beams includes all beams within a cell. Therefore, the terminal can determine the preferred beam through measurement on any one allocated BWP.
For another example, by configuring each BWP with CSI-RS of partial beams for beam management, the terminal device can measure the signal quality of multiple beams corresponding to the same BWP and determine a preferred beam. As shown in fig. 1, CSI-RSs of multiple beams corresponding to the same BWP are configured at each BWP. Enabling the terminal device to select to switch to another beam using the same BWP.
And 106, switching beams through a random access process.
Preferably, the random access procedure is initiated on a random access resource corresponding to the initial BWP and any one of the beams. 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.
For example, when the terminal needs beam switching, it actively jumps to the initial BWP, and initiates random access on the uplink random access resource bound by the preferred beam (second beam), thereby completing beam switching.
That is, 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 a beam (second beam) corresponding to the random access resource according to the binding relationship between the random access resource and the beam.
It should be noted that BWP switching of the existing NR system is independent for uplink and downlink, where the downlink indicates the BWP where the scheduled data is located through the BWP indicator of DCI format 1_1, and the uplink indicates the BWP where the scheduled data is located through the BWP indicator of DCI format 0_1, so that the uplink and downlink BWPs are not necessarily the same BWP, and therefore, a newly designed beam switching process switches the uplink BWP and the downlink BWP at the same time.
Fig. 3 is a flowchart of an embodiment of a method of the present application for a network device.
The embodiment of the method for the network equipment can comprise the following steps 201-206:
step 201, the network device sends a synchronization signal and system information at the initial BWP indicated by the initial CORESET, so as to implement synchronization and transmit initial configuration information (CORESET # 0);
after the initial BWP synchronization, the terminal initiates random access, and RRC signaling needs to be configured to the dedicated BWP of the terminal and/or the beam corresponding to each BWP. Adding a dedicated BWP identifier configured for a terminal and/or M beams related to N BWPs in RRC common signaling, and indicating beam information related to each BWP, specifically as in steps 202-205:
step 202, a network device configures an uplink random access resource on an initial BWP, where the random access resource and a beam have a binding relationship;
the indication of the random access resource configuration, e.g. in SIB signaling, contains the binding relationship between the random access resource and the beam.
Step 203, the network device receives a random access request at an uplink random access resource and establishes connection with a terminal device;
the network device receives a random access request at an initial BWP and a random access resource corresponding to any beam;
the network device further determines a beam according to the binding relationship between the random access resource and the beam, where the uplink beam is the same as the downlink beam, for example, the uplink beam is the first beam.
Step 204, the network device sends an RRC common signaling for determining a corresponding relationship between a plurality of BWPs and a plurality of beams;
the network equipment sends the RRC common signaling at the initial BWP, and the RRC common signaling also comprises the corresponding relation between N BWPs and M beams; the corresponding relation means that the ith BWP is for the jth beam.
Step 205, the network device sends an RRC common signaling, configured to configure at least one dedicated BWP dedicated to the terminal device, and activate one dedicated BWP; the activated dedicated BWP corresponds to the first beam;
for example, the network device sends the RRC common signaling at an initial BWP (BWP0), where the RRC common signaling includes a dedicated BWP identifier corresponding to any one terminal;
that is to say, through steps 203 to 205, through the initial BWP, the network device receives a random access request on a random access resource corresponding to any one beam (first beam), where, for any one terminal, this beam (first beam) has a correspondence with a dedicated BWP of the terminal, and the network device sends the RRC common signaling, which includes a dedicated BWP identifier corresponding to any one terminal; this may enable the terminal to switch from the initial BWP to a dedicated BWP, establishing communication on said dedicated BWP and said any one beam.
Step 206, the network device receives a random access request at an uplink random access resource, and establishes a new connection with a 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, where the uplink beam is the same as the downlink beam, for example, the uplink beam is the second beam.
For example, the network device receives a random access request on a 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 of the method of the present application, applied to a terminal device.
The embodiment of the method for the terminal equipment can comprise the following steps 301-307:
step 301, the terminal device detects and receives the synchronization signal at the initial BWP, and obtains the configuration information;
for example, the terminal searches PSS and SSS for downlink synchronization, decodes broadcast MIB information, for obtaining 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, the terminal device receives a physical broadcast channel carrying main system information (MIB), where the main system information indicates to the terminal device an information set, and the information set at least includes an SSB index and a subcarrier interval of a PDCCH/PDSCH transmitting SIB 1.
Step 302, the terminal device receives the binding relationship between the random access resource and the beam on the initial BWP;
the indication on the random access resource configuration, e.g. in SIB signalling, contains the binding relationship between the random access resource and the beam.
Step 303, the terminal device initiates a random access process on a random access resource corresponding to any beam (first beam), and establishes a connection with the network device;
the terminal sends a random access request on the initial BWP according to the resource 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 RRC connection establishment on CORSET # 0.
Step 304, the terminal device receives the RRC common signaling, and determines the corresponding relationship;
the corresponding beam identification of the BWP identification is added in the BWP common signaling.
The terminal equipment receives the RRC common signaling, wherein the RRC common signaling also comprises the corresponding relation between N BWPs and M beams; the corresponding relation means that the ith BWP is used for the jth beam.
305, the terminal equipment receives the RRC common signaling and determines the special BWP; the dedicated BWP corresponds to the first beam.
Preferably, the terminal device, during the process of establishing communication on any beam, further includes the following steps, the terminal device receives the RRC common signaling at the initial BWP, and determines the dedicated BWP; the terminal device switches from the initial BWP to the dedicated BWP.
In the following steps 306-307, when the terminal needs to perform beam switching, a new beam obtained by the terminal measurement is found, and random access is initiated on the uplink random access resource bound with the new beam of the initial BWP, so as to complete beam switching.
Step 306, the terminal device performs beam measurement to determine a switched target beam (second beam);
and the terminal equipment performs beam measurement through the CSI-RS and determines a beam to be switched. Preferably, the terminal device is capable of measuring the quality of all beams. All beams herein refer to all beams in a cell, or all beams in a plurality of beams are pre-designated in a cell. The beams using different BWPs are included in all the beams.
Measuring multiple beams at BWP0 may be accomplished by configuring CSI-RSs for all beams at BWP 0. At this point, the terminal device is required to switch to BWP0 for measurement for beam management.
Since the dedicated BWP is located in only partial beams, measuring multiple beams in the dedicated BWP can also be achieved by configuring CSI-RS of multiple beams (or all beams) in the dedicated BWP.
Step 307, the terminal device sends a random access request on a random access resource corresponding to the second beam, and establishes a new connection.
For example, the terminal device initiates a random access procedure on a 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 one 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.
Fig. 5 is a schematic diagram of an embodiment of a network device.
An embodiment of the present application further provides a network device, where, using the method according to any one of the embodiments of the present application, the network device is configured to: transmitting the RRC common signaling; a random access request is received at a random access resource corresponding to any one beam having a correspondence relationship with a dedicated BWP, and communication is established over the dedicated BWP and the any one beam.
Preferably, the network device is configured to: receiving a random access request at an initial BWP and a random access resource corresponding to any beam, wherein the network equipment sends the RRC common signaling and comprises a special BWP identification corresponding to any terminal; establishing communication on the dedicated BWP and the any one beam.
Preferably, the network device is further configured to: sending RRC common signaling for determining the corresponding relation between a plurality of BWPs and a plurality of beams; and receiving a random access request at a random access resource corresponding to the jth beam, and switching the communication to the jth beam and the ith BWP.
In order to implement the foregoing technical solution, the network device 400 provided in the present 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, a high-level signaling (RRC common signaling), an SSB (including a PSS and a SSS), an SIB, and an MIB.
The network determining module is configured to determine a dedicated BWP and further determine a correspondence between the N BWPs and the M beams; the method is also used for determining the binding relationship between the random access resources and the wave beams; and determining a beam corresponding to the random access resource occupied by the random access request according to the binding relationship.
The network receiving module is further configured to receive a random access request.
The specific method for implementing the functions of the network sending module, the network determining module, and the network receiving module is described in the embodiments of the methods shown in fig. 1 to 4, and will not be described herein again.
Fig. 6 is a schematic diagram of an embodiment of a terminal device.
The present application further provides a terminal device, which uses the method of any embodiment of the present application, and the terminal device is configured to establish synchronization in the initial BWP, send a random access request on a random access resource corresponding to any beam, receive an RRC signaling, and establish communication on any beam.
Further, the terminal device is further configured to: switching from the initial BWP to the dedicated BWP based on a dedicated BWP identity contained in the RRC signaling.
Further, the terminal device is further configured to: receiving the RRC public signaling and determining the corresponding relation; and initiating a random access process on a random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.
In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503.
The terminal receiving module is configured to receive the high-level signaling, and is further configured to receive a CORESET, an SSB (including a PSS and a SSS), an SIB, an MIB, and the like from a network device; and further, the method is also used for receiving CSI-RS of each beam.
The terminal determining module is configured to determine a BWP dedicated to the terminal according to the high-level signaling, and is further configured to determine a correspondence between the N BWPs and the M beams according to the high-level signaling; the system is also used for determining the binding relationship between the random access resources and the wave beams according to the system information; and the UE is further used for determining an optimal beam according to the CSI-RS and determining a random access resource corresponding to the optimal beam according to the binding relationship.
And the terminal sending module is used for sending the random access request and the RRC connection request.
The specific method for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module is described in the embodiments of the methods shown in fig. 1 to 4 of the present application, and is not described herein again.
The terminal equipment can be mobile terminal equipment.
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. Wherein the wireless interface may be a plurality of components, i.e. including a transmitter and a receiver, providing means for communicating with various other apparatus over a transmission medium. The wireless interface implements a communication function with the terminal device, and processes wireless signals through the receiving and transmitting devices, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program for executing any of the embodiments of the present application shown in fig. 1 to 4, 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 are not described herein.
Fig. 8 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 700 shown in fig. 8 comprises at least one processor 701, a memory 702, a 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. A bus system is used to enable connection communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 703 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen, among others.
The memory 702 stores executable modules or data structures. The memory may have stored therein an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, and the like for implementing various application services.
In the embodiment of the present invention, the memory 702 contains a computer program for executing any one of the embodiments of fig. 1 to 3 of the present application, and the computer program runs or changes on the processor 701.
The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and combines the hardware to complete the steps of the above-described method. In particular, the computer-readable storage medium has stored thereon a computer program, which when executed by the processor 701 implements the steps of the method embodiment as described above with reference to any one of the embodiments of fig. 1 to 4.
The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of the present application may be implemented by hardware integrated logic circuits in the processor 701 or by instructions 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, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. 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 connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented 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 device of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and a 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, and the like) having computer-usable program code embodied therein.
The present application therefore also proposes a computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application. For example, the memory 603, 702 of the present invention may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM).
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, 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 Discs (DVD) or other optical storage, magnetic 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, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
Based on the embodiments in fig. 5 to 8, the present application further provides a mobile communication system, which includes at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
It should be noted that "first" and "second" in the present application are used to distinguish a plurality of objects having the same name, and have no other special meaning unless specifically stated.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims (17)

1. A method for beam switching in a multi-beam, multi-BWP mobile communication cell, comprising the steps of:
allocating one BWP per beam, one BWP for each beam at least;
configuring a random access resource on an initial BWP, wherein the random access resource and a beam have a binding relationship: the jth uplink access resource corresponds to the jth beam, and j is 1-M;
the corresponding relation between the N BWPs and the M wave beams means that the ith BWP is used for the jth wave beam, i is 1-N, and the RRC common signaling contains the corresponding relation;
establishing communication on the dedicated BWP and any one of the beams;
and performing a random access process on the random access resource corresponding to the initial BWP and the jth beam, so that the communication is switched to the jth beam and the ith BWP.
2. The method of claim 1,
the initial BWP corresponds to the M beams;
and initiating a random access process on the random access resource corresponding to the initial BWP and any beam.
3. The method of claim 1,
the RRC signaling contains a dedicated BWP identity of any one terminal device.
4. A method according to any one of claims 1 to 3, for use in a network device, comprising the steps of:
the network equipment sends the RRC public signaling, and the RRC public signaling comprises the corresponding relation;
and the network equipment receives a random access request at a random access resource corresponding to the jth beam, so that the communication is switched to the jth beam and the ith BWP.
5. The method of claim 4, further comprising the steps of:
the network equipment receives a random access request at an initial BWP and a random access resource corresponding to any beam;
the network equipment sends the RRC public signaling, which contains a special BWP identification corresponding to any terminal;
establishing communication on the dedicated BWP and the any one beam.
6. The method according to any one of claims 1 to 3, used for a terminal device, comprising the steps of:
the terminal equipment detects and receives a synchronous signal and initiates a random access process at the initial BWP, and establishes communication on any beam;
the terminal equipment receives the RRC common signaling and determines the corresponding relation;
and the terminal equipment initiates a random access process on a 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 step of,
the terminal equipment receives the RRC common signaling and determines the special BWP;
the terminal device switches from the initial BWP to the dedicated BWP.
8. The method of claim 6,
and the terminal equipment is switched to the initial BWP from any BWP to send a random access request, so that the communication is switched to the jth beam and the ith BWP.
9. A network device, the method of any one of claims 1 to 5, wherein the network device is configured to,
receiving a random access request at an initial BWP, a random access resource corresponding to any one beam; sending the RRC common signaling, wherein the RRC common signaling comprises a special BWP identification corresponding to any terminal; establishing communication on the dedicated BWP and the any one beam.
10. The network device of claim 9, wherein the network device is further configured to,
and receiving a random access request at a random access resource corresponding to the jth beam, and switching the communication to the jth beam and the ith BWP.
11. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 5.
12. A terminal device, using the method as claimed in any one of claims 1 to 3 and 6 to 8, wherein the terminal device is configured to,
and establishing synchronization in the initial BWP, sending a random access request in a random access resource corresponding to any beam, receiving RRC signaling, and establishing communication on any beam.
13. The terminal device of claim 12, wherein the terminal device is further configured to,
switching from the initial BWP to the dedicated BWP according to a dedicated BWP identification contained in the RRC signaling.
14. The terminal device of claim 12, wherein the terminal device is further configured to,
and initiating a random access process on a 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, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the method according to any one of claims 1 to 3, 6 to 8.
16. A mobile communication system comprising at least one network device according to any of claims 9 to 11 and at least one terminal device according to any of claims 12 to 15.
17. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
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