CN111817835B - Beam switching indication method, device and system - Google Patents
Beam switching indication method, device and system Download PDFInfo
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- CN111817835B CN111817835B CN202010490859.0A CN202010490859A CN111817835B CN 111817835 B CN111817835 B CN 111817835B CN 202010490859 A CN202010490859 A CN 202010490859A CN 111817835 B CN111817835 B CN 111817835B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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, one BWP for each beam at least; the downlink control signaling is used for notifying the terminal device of BWP (uplink/downlink carrier wave protocol) identifiers after beam switching and BWP identifiers of downlink beams after switching; the upstream BWP and the downstream BWP are the same. 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 different frequency deployment scenes by adopting different BWPs, and reduce switching time delay.
Description
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 in the uplink and downlink at the same time, 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 transmitting end transmits SSBs on the initial bandwidth part (BWP 0) and then transmits data to the terminal device on the bandwidth part (BWP 2) allocated to the terminal device.
The terminal device in the RRC idle state will measure SSB on BWP0 for beam switching; for the RRC connected terminal, if the bandwidth supported by the terminal is large, BWP0 and BWP2 allocated to the terminal need to be measured simultaneously, and if the bandwidth supported by the terminal device is small, the terminal device frequently switches to BWP0 for measurement.
In addition, in the scenario of inter-frequency deployment, each BWP corresponds to only a part of beams, and when a beam is switched, the signal quality of all beams cannot be measured on the assigned BWP, so that the information of the target BWP to be switched and the information of the target beam to be switched cannot be directly obtained.
Disclosure of Invention
The application provides a method, equipment and a system for indicating beam switching, which solve the problem of frequent cell switching under the condition of pilot frequency deployment in the prior art. The method is particularly suitable for satellite communication.
In a first aspect, an embodiment of the present application provides a beam switching indication 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;
configuring, at each BWP, reference signals (CSI-RS) for downlink channel state information of a plurality of beams including beams using different BWPs;
the downlink control signaling is used for informing the terminal device of BWP identifiers of uplink and downlink after beam switching and BWP identifiers of downlink after switching;
the upstream BWP and the downstream BWP are the same.
Optimally, the plurality of beams includes all beams within a cell.
Preferably, the downlink control signaling includes N command units of m bits; each command unit comprises at least 1 BWP mark and at least 1 beam mark;
the maximum value of the number of BWPs and the maximum value of the number of beams which can be used for identification by the m bits are not less than the total number of BWPs and the total number of beams of the cell; the N command units respectively correspond to one terminal device.
Or, the downlink control signaling only contains at least 1 BWP id and at least 1 beam id after handover, which are dedicated to one terminal device.
The method of the first aspect of the present application, for a terminal device, comprises the following steps,
receiving information used for indicating the position of random access resources at an initial BWP indicated by an initial CORESET, sending a random access request and/or a connection request, receiving high-layer signaling, and obtaining the identification of a first BWP special for the terminal equipment and the identification of a first beam.
Preferably, the method of the present application is applied to a terminal device, and further includes the following steps:
and receiving data on the first BWP and the first beam, and when the detected information meets the beam switching condition, sending a beam switching request on the first BWP, wherein the beam switching request comprises the identifier of at least one candidate beam.
Preferably, the method described in the present application is applied to a terminal device, and further includes the following steps:
receiving the downlink control signaling at a first BWP and a first beam, and identifying a second BWP identifier and a second beam identifier corresponding to the terminal device;
sending confirmation information;
and switching to the second BWP and the second beam for receiving downlink control information and downlink data.
Preferably, the method of the present application is applied to a terminal device, and further includes the following steps:
the acknowledgement information is sent at the first BWP.
The method of the first aspect of the present application is applied to a network device, and further includes the following steps:
sending a high-level signaling at an initial BWP indicated by an initial CORESET, wherein the high-level signaling is used for configuring at least one BWP special for the terminal equipment and a downlink beam corresponding to each BWP and activating a first BWP; the first BWP corresponds to a first beam.
Preferably, the method described in the present application is applied to a network device, and further includes the following steps:
receiving a beam switch request at the first BWP containing an identification of at least one candidate beam;
the downlink control signaling is sent by the first BWP and the first beam, and a command unit corresponding to the terminal device comprises an identifier of a second BWP and an identifier of a second beam;
receiving confirmation information;
and switching to the second BWP and the second beam for sending downlink control information and downlink data.
Preferably, the method described in the present application is applied to a network device, and further includes the following steps:
and switching to a second BWP for a set duration after receiving the confirmation information.
Preferably, the method described in the present application is applied to a network device, and further includes the following steps:
the acknowledgement information is received at the first BWP.
In a second aspect, the present application further provides a network device, configured to send a higher layer signaling at an initial BWP indicated by an initial CORESET, configure at least one BWP dedicated to the terminal and a downlink beam corresponding to each BWP, and activate a first BWP; the first BWP corresponds to a first beam.
Preferably, the network device is further configured to receive a beam switching request at the first BWP, including an identification of at least one candidate beam; the downlink control signaling is sent by the first BWP and the first beam, and a command unit corresponding to the terminal device comprises an identifier of a second BWP and an identifier of a second beam; receiving confirmation information; and switching to the second BWP and the second beam for sending downlink control information and downlink data.
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 receive, at an initial BWP indicated by an initial CORESET, information indicating a location of a random access resource, send a random access request and/or a connection request, receive a higher layer signaling, and obtain an identifier of a first BWP and an identifier of a first beam dedicated to the terminal device.
Further, the terminal device is further configured to perform data reception on the first BWP and the first beam, and when the detected information satisfies the beam switching condition, send a beam switching request in the first BWP, where the beam switching request includes an identifier of at least one candidate beam.
Further, the terminal device receives the downlink control signaling at a first BWP and a first beam, and identifies an identifier of a second BWP and an identifier of a second beam corresponding to the terminal device; sending confirmation information; and switching to the second BWP and the second beam for receiving downlink control information and downlink data.
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 an inter-frequency deployment scene that a cell has a plurality of beams and adjacent beams are sent by different BWPs, a new downlink control signaling is introduced for indicating the beam switching of a terminal, and the downlink control signaling can indicate the terminal to be switched to the same BWP simultaneously in uplink and downlink and is used for receiving a downlink control beam after being switched to the BWP so as to indicate the terminal to send uplink data and receive the uplink data. And meanwhile, uplink HARQ confirmation of the downlink control signaling is introduced, so that resource waste caused by inconsistent understanding of the base station and the terminal is avoided.
Especially, in the case of multiple beams in a cell in satellite communication and in a system for implementing a frequency reuse factor greater than 1 by using multiple BWPs, a downlink control signaling is designed to complete beam switching, thereby effectively avoiding 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 flowchart 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
To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to 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.
In non-terrestrial communication (NTN) systems, etc., there may be multiple beams for a cell (PCI). For example, a cell has L largest SSB directions distinguished by SSB indices, and different beams each transmit an SSB. For the terminal equipment in idle state (idle), only one SSB mapped to PCI needs to be detected, so that quick and simple synchronization can be realized, and for the terminal equipment in connection state, the SSB special for the beam and the reference signal (CSI RS) of the downlink channel state information can be used for associating the beam meeting the requirement, so that packet transmission interruption and signaling overhead increase caused by cell switching are avoided. If each beam of a cell uses the same carrier frequency, the bandwidth allocated to each beam is larger, but a beam covering a small terminal may cause co-channel interference of signals transmitted on adjacent beams, so different beams of a cell may use different carrier frequencies, in which case, one adjacent beam of a cell is allocated different BWPs to avoid co-channel interference. 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.
Regarding BWP handover. 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). Among them, the BWP handover based on DCI is the most flexible of the three. As long as there is DCI, a handover may be initiated. For example, one BWP index field in DCI 1-1 is used to indicate a target downlink BWP for handover, and similarly, one BWP index field in DCI 0-1 is used to indicate a target uplink BWP for handover. In NR, DCI 1-1 and DCI 0-1 are used to schedule data and can instruct BWP to switch. The prior art protocols do not support that DCI is only used to indicate BWP handover without scheduling data.
The initial BWP (BWP 0) 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 transmitting end transmits SSB/SIB on BWP0 and transmits data to the terminal device on the allocated BWP (BWP 2).
After a terminal device (UE) accesses a beam in a coverage area, if the bandwidth supported by the terminal is large, the SSB for measuring BWP0 needs to be monitored while measuring BWP2 allocated to the terminal for beam switching, if the bandwidth supported by the terminal is small, on one hand, the SSB for measuring BWP0 needs to be measured for beam switching, and on the other hand, the BWP2 allocated to the terminal needs to be measured, so that frequent switching between BWP2 and BWP0 is needed, and the problem solved by the application is that for the condition that the bandwidth supported by the terminal is small, only a reference signal CSI-RS needs to be measured on BWP2, beam switching can be completed without frequently switching to BWP0 to measure SSB signals.
The beam management in the existing NR system is on the same frequency, each BWP can correspond to all beams, and when performing beam switching, the downlink control signaling can directly indicate new beam information and new BWP information when scheduling data. However, the uplink BWP handover and the downlink BWP handover are separately indicated, that is, there is downlink control signaling for indicating the uplink BWP handover and the downlink BWP handover, respectively, so that the BWPs after terminal handover are not necessarily on the same BWP.
Figure 1 is a schematic diagram of a multi-beam frequency reuse cell. Each cell represents a beam; f0 F1, F2 represent different BWPs. With respect to inter-frequency deployment, if each BWP corresponds to only a part of beams in the inter-frequency deployment scenario, the first problem is that the signal quality of all beams cannot be measured on the assigned BWP (e.g. BWP2 described above) when the beams need to be switched; the second problem is that the terminal device cannot directly obtain the target BWP information of the handover as well as the information of the handover target beam.
The first problem may be solved by configuring each BWP with CSI-RS for all beams for beam management; since the prior art can only obtain information of all switched beams on BWP0, the solution of the present application can allow the terminal to obtain the information of all switched beams on the allocated BWP, as described above, if the bandwidth supported by the terminal is small, the information of all beams can be obtained only on the allocated BWP2, because the CSI-RSs transmitting all beams are configured on all BWPs.
The second problem is to introduce new downlink control signaling for indicating the target BWP of the handover and the beam after the beam handover.
The downlink control signaling for NR BWP handover is scheduled together with data, and when a heterogeneous network is deployed, dedicated BWP handover signaling for beam handover is introduced, because a downlink control channel for scheduling reception of downlink data and transmission of uplink data must be received on a target BWP after handover.
The present patent designs a new downlink control signaling, which avoids frequent switching of BWP, and can directly switch to a new beam corresponding to a new BWP on the assigned BWP (for example, the aforementioned BWP 2) for data transmission.
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:
when the frequency reuse factor is greater than 1, the system bandwidth is divided into a plurality of BWPs, with each beam being transmitted on one BWP. Each beam is assigned one BWP, one BWP for each beam at least.
For example, in fig. 1, the cell has a total of 8 beams, but there are 3 BWPs, F0, F1, and F2. The number of beams is greater than the number of BWPs, each of which is multiplexed by multiple cells.
for example, the terminal searches PSS and SSS for downlink synchronization, decodes broadcast MIB information, for obtaining configuration of control resource set CORESET #0 (initial CORESET), and decodes SIB1 information on the indicated initial BWP. The terminal sends a random access request on an initial BWP 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 for configuring the BWP dedicated for the UE, can configure 4 BWPs at most, and is activated on only one BWP. Configuring the terminal-specific BWP and/or the corresponding beam of each BWP through RRC signaling.
by configuring each BWP with CSI-RS for all beams for beam management, the terminal device can measure the signal quality of all beams and determine candidate beams.
As described in the background, a terminal is assigned to BWP2. Since the beam where BWP2 is located is only a partial beam, the scheme of the present invention needs to configure CSI-RS of all beams to implement measurement of all beam quality at BWP2.
All beams herein refer to all beams within a cell; or all beams pre-designated within a cell. The beams using different BWPs are included in all the beams.
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 candidate beams through measurement on any allocated BWP, and make a beam switching request through uplink control signaling.
The downlink control signaling is used for informing the terminal device of BWP identifiers of uplink and downlink after beam switching and BWP identifiers of downlink after switching; the upstream BWP and the downstream BWP are the same.
In step 104, a new downlink control signaling is introduced to indicate the target BWP for handover and the beam after beam handover.
In the scenario described in this application, for example, the TCI state ID (i.e. beam ID) corresponding to the BWP ID may be added to the BWP common signaling; it is also possible to add a terminal-specific TCI state ID in BWP-specific signaling. Or, for the design of the new downlink control signaling, it may be terminal-specific signaling or terminal group common signaling.
Preferably, the downlink control signaling includes N command units of m bits; each command unit comprises at least 1 BWP mark and at least 1 beam mark; the maximum value of the number of BWPs and the maximum value of the number of beams which can be used for identification by the m bits are not less than the total number of BWPs and the total number of beams of the cell; the N command units respectively correspond to one terminal device. For example, N = floor (L _ format/m), where L _ format represents a bearer size (payload size) of the downlink control signaling; n =1, \ 8230;, N, representing the BWP and/or beam to be switched by the nth user.
For example, a terminal index is configured through a high-level signaling, the terminal index corresponds to a command unit of the downlink control signaling, one command unit consists of m bits, and there are N command units in total for identifying the configured terminal. For example, when the terminal index of the UE2 is 13, the command unit of the 13 th index of the downlink control signaling is configured for the UE 2.
If the signaling is a terminal group common signaling, RNTI for beam switching can be introduced, and a downlink control channel is scrambled by the newly designed RNTI; the downlink control signaling is used for notifying the BWP ID where the beam of the group of terminals is switched, and on this basis, notifying the TCI state ID where the beam of the group of terminals is switched.
Or, the downlink control signaling only contains at least 1 BWP id and at least 1 beam id after handover, which are dedicated to one terminal device.
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_, and the uplink indicates the BWP where the scheduled data is located through the BWP indicator of DCI format 0_, so that the uplink and downlink BWPs are not necessarily the same BWP, and therefore, a newly designed downlink control signaling needs to indicate switching of the uplink and downlink BWPs at the same time.
It should be noted that, the downlink control signaling for NR BWP handover is scheduled together with data, and when deploying a heterogeneous network, dedicated BWP handover signaling for beam handover is introduced, because the downlink control channel for scheduling downlink data reception and uplink data transmission must be received on the target BWP after handover.
Fig. 3 is a flowchart of an embodiment of the method of the present application for a network device.
Embodiments of the method for a network device may include the steps of:
preferably, the acknowledgement information is received at a first BWP, since the downlink control new forest is sent at the first BWP.
Preferably, the network device switches to the second BWP for a set duration after receiving the confirmation message. For example, after the downlink switching control information is sent, if the base station receives an acknowledgement message ACK sent by the user equipment, the base station switches to the target BWP x slots after receiving the ACK.
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:
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. The terminal sends a random access request on an 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 an initial uplink BWP, and the base station sends an RRC connection setup on CORSET #0, which is used for configuring the BWP dedicated to the terminal, can configure 4 BWPs at most, and is activated on only one BWP. In the scenario, a downlink beam corresponding to each BWP is also configured.
for example, the terminal performs CSI-RS measurement on a received signal and determines whether to switch. Here, the detected information satisfies a beam switching condition, e.g., the measured RSRP is less than a switching threshold
the terminal device receives the downlink control signaling at a first BWP and a first beam, and identifies a second BWP identifier and a second beam identifier corresponding to the terminal device;
and the network equipment (base station) sends the newly designed downlink control signaling to the terminal, indicates the terminal to receive data on the second BWP to which the terminal needs to be switched and a new downlink second beam, and receives downlink control information, uplink data or downlink data on the second beam of the second BWP.
The physical downlink signaling comprises an indication of a BWP coefficient and/or an indication of a beam coefficient, and if the configurable maximum BWP is M, the bit number of the BWP coefficient is log 2 M bit, if the beam is N at most, the number of bits of the beam coefficient is log 2 N bits.
The downlink control signaling is the above terminal dedicated signaling or common signaling.
in this step, a sending manner of the HARQ-ACK information of the physical downlink control channel is determined, for example, the terminal sends the HARQ-ACK information of the physical downlink control channel on the first BWP, and is used for confirming the downlink control signaling, so as to avoid that a wireless link fails due to inconsistency in understanding the downlink control signaling between the base station and the terminal, for example, the terminal does not receive the downlink control signaling yet, or the terminal decodes wrong downlink control information and performs data reception on a wrong BWP and/or a wrong beam, thereby causing data reception failure.
Preferably, the PUCCH fed back by the uplink HARQ implicitly corresponds to the resource of the downlink control signaling, that is, the PUCCH resource fed back by the uplink HARQ and the resource of the downlink control signaling fed back have a binding relationship.
Preferably, the acknowledgement information is transmitted at the first BWP.
The key point of this embodiment is that the terminal device acquires a physical downlink control channel, where the physical downlink control channel is used to indicate a target beam for terminal beam failure recovery and a target BWP to be switched, and both uplink and downlink are switched to the target BWP, where the target beam is a downlink beam. And determining a sending mode of the HARQ-ACK information of the physical downlink control channel, preferably, implicitly corresponding the PUCCH fed back by the uplink HARQ and the resource of the downlink control signaling, namely, the PUCCH resource fed back by the uplink HARQ and the resource of the fed downlink control signaling have a binding relationship.
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: sending a high-level signaling at an initial BWP indicated by an initial CORESET, wherein the high-level signaling is used for configuring at least one BWP special for the terminal and a downlink beam corresponding to each BWP and activating a first BWP; the first BWP corresponds to a first beam.
Further, the network device is further configured to: receiving a beam switch request at the first BWP including an identification of at least one candidate beam;
the downlink control signaling is sent in the first BWP and the first beam, and a command unit corresponding to the terminal equipment comprises an identifier of a second BWP and an identifier of a second beam; receiving confirmation information; and switching to the second BWP and the second beam for sending downlink control information and downlink data.
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 downlink control signaling, the CORESET, a high-level signaling (RRC), an SSB (including a PSS and a SSS), an SIB, and an MIB.
The network determining module is used for determining downlink control signaling information and comprises N command units with m bits; each command unit comprises at least 1 BWP mark and at least 1 beam mark; the maximum value of the number of BWPs and the maximum value of the number of beams which can be used for identification by the m bits are not less than the total number of BWPs and the total number of beams of the cell; the N command units respectively correspond to one terminal device.
The network receiving module is further configured to receive an uplink control signaling or a high-level signaling (for example, a semi-static configuration signaling RRC); further, the network receiving module is further configured to receive uplink data. Further, the network receiving module is further configured to receive a PRACH access request and/or an RRC connection establishment 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 proposes a terminal device, using the method of any of the embodiments of the present application, where the terminal device is configured to receive, at an initial BWP indicated by an initial CORESET, information indicating a location of a random access resource, send a random access request and/or a connection request, receive higher layer signaling, and obtain an identifier of a first BWP and an identifier of a first beam dedicated to the terminal device.
Further, the terminal device is further configured to: and receiving data on the first BWP and the first beam, and when the detected information meets the beam switching condition, sending a beam switching request on the first BWP, wherein the beam switching request comprises the identifier of at least one candidate beam.
Further, the terminal device is further configured to: receiving the downlink control signaling at a first BWP and a first beam, and identifying a second BWP identifier and a second beam identifier corresponding to the terminal device; sending confirmation information; and switching to the second BWP and the second beam for receiving downlink control information and downlink data.
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 or the downlink control signaling, and is further configured to receive a CORESET, an SSB (including a PSS and an SSS), an SIB, an MIB, and the like from a network device;
and the terminal determining module is configured to determine, according to the high-level signaling, an identifier of a first BWP and/or a first beam, and is further configured to determine, according to the downlink control signaling, an identifier of a second BWP and/or a second beam.
And the terminal sending module is used for sending the random access request and the RRC connection request. The terminal sending module is further configured to send uplink control information (including HARQ-ACK) and uplink data.
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, including a transmitter and a receiver, providing a 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 performing any of the embodiments of fig. 1 to 3 of the present application, which computer program runs or is adapted on the processor 601. When the memory, processor, 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.
The memory 702 stores executable modules or data structures. The memory may store an operating system and application programs. 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, performs 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 integrated logic circuits in hardware or instructions in software in the processor 701. 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 comprise volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile 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 phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus comprising the element.
It should be noted that the terms "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 otherwise specified.
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. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (19)
1. A method for indicating beam switching in a multi-beam, multi-BWP mobile communication cell, comprising the steps of:
allocating one BWP per beam, each BWP for at least one beam;
the downlink control signaling is used for notifying the terminal device of BWP (uplink/downlink carrier wave protocol) identifiers after beam switching and BWP identifiers of downlink beams after switching;
the upstream BWP is the same as the downstream BWP;
the downlink control signaling comprises N command units with m bits;
each command unit comprises at least 1 BWP mark and at least 1 beam mark;
the maximum value of the number of BWPs and the maximum value of the number of beams which can be used for identification by the m bits are not less than the total number of BWPs and the total number of beams of the cell;
the N command units respectively correspond to one terminal device.
2. The method of claim 1, wherein reference signals for downlink channel state information of a plurality of beams including a beam using a different BWP are configured at each BWP.
3. The method of claim 1,
the downlink control signaling only contains at least 1 BWP identification and at least 1 beam identification after switching which are special for one terminal device.
4. The method according to any of claims 1 to 3, for a mobile terminal characterized in that,
receiving information used for indicating the position of the random access resource at the initial BWP indicated by the initial CORESET, sending a random access request and/or a connection request, receiving high-level signaling, and obtaining the identification of the first BWP and the identification of the first beam which are special for the terminal equipment.
5. The method of claim 4,
and receiving data on the first BWP and the first beam, and when the detected information meets the beam switching condition, sending a beam switching request on the first BWP, wherein the beam switching request comprises the identifier of at least one candidate beam.
6. The method of claim 5,
receiving the downlink control signaling at a first BWP and a first beam, and identifying a second BWP identifier and a second beam identifier corresponding to the terminal device;
sending confirmation information;
and switching to the second BWP and the second beam for receiving downlink control information and downlink data.
7. The method of any one of claims 1 to 3, for use in a network device,
sending a high-level signaling at an initial BWP indicated by an initial CORESET, wherein the high-level signaling is used for configuring at least one BWP special for the terminal equipment and a downlink beam corresponding to each BWP and activating a first BWP; the first BWP corresponds to a first beam.
8. The method of claim 7,
receiving a beam switch request at the first BWP containing an identification of at least one candidate beam;
the downlink control signaling is sent by the first BWP and the first beam, and a command unit corresponding to the terminal device comprises an identifier of a second BWP and an identifier of a second beam;
receiving confirmation information;
and switching to the second BWP and the second beam for sending downlink control information and downlink data.
9. The method of claim 6 or 8,
the acknowledgement information is transmitted or received at the first BWP.
10. The method of claim 8,
and switching to the second BWP for the set duration after receiving the confirmation information.
11. A network device, using the method of any one of claims 1 to 3, wherein the network device is configured to perform the method of any one of claims 1 to 3
Sending a high-level signaling at an initial BWP indicated by an initial CORESET, wherein the high-level signaling is used for configuring at least one BWP special for the terminal and a downlink beam corresponding to each BWP and activating a first BWP; the first BWP corresponds to a first beam.
12. The network device of claim 11,
receiving a beam switch request at the first BWP containing an identification of at least one candidate beam;
the downlink control signaling is sent by the first BWP and the first beam, and a command unit corresponding to the terminal device comprises an identifier of a second BWP and an identifier of a second beam;
receiving confirmation information;
and switching to the second BWP and the second beam for sending downlink control information and downlink data.
13. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 3, 7 to 10.
14. A terminal device using the method of any one of claims 1 to 3, wherein the terminal device is configured to perform the method
Receiving information used for indicating the position of the random access resource at the initial BWP indicated by the initial CORESET, sending a random access request and/or a connection request, receiving high-level signaling, and obtaining the identification of the first BWP and the identification of the first beam which are special for the terminal equipment.
15. The terminal device of claim 14,
and receiving data on the first BWP and the first beam, and when the detected information meets the beam switching condition, sending a beam switching request on the first BWP, wherein the beam switching request comprises the identifier of at least one candidate beam.
16. The terminal device of claim 14,
receiving the downlink control signaling at a first BWP and a first beam, and identifying a second BWP identifier and a second beam identifier corresponding to the terminal device;
sending confirmation information;
and switching to the second BWP and the second beam for receiving downlink control information and downlink data.
17. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 6.
18. A mobile communication system comprising at least one network device according to any of claims 11 to 13 and at least one terminal device according to any of claims 14 to 17.
19. 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 10.
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| CN112423349B (en) * | 2020-10-27 | 2021-11-05 | 中国水利水电科学研究院 | New energy big data platform data cleaning method and system |
| CN114679244A (en) * | 2020-12-25 | 2022-06-28 | 展讯半导体(南京)有限公司 | Cross-carrier data transmission method and device, terminal and network equipment |
| CN114679245A (en) * | 2020-12-25 | 2022-06-28 | 展讯半导体(南京)有限公司 | Carrier switching method and device, terminal and network equipment |
| WO2022236805A1 (en) * | 2021-05-14 | 2022-11-17 | Qualcomm Incorporated | Small data transmissions with beam switching for idle/inactive state user equipment in non-terrestrial network |
| CN115484660A (en) * | 2021-05-31 | 2022-12-16 | 展讯半导体(南京)有限公司 | Beam indication method and device, storage medium, terminal and network equipment |
| EP4344114A1 (en) * | 2021-07-23 | 2024-03-27 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Pdcch monitoring method and apparatus, and device and storage medium |
| CN113727363B (en) * | 2021-07-23 | 2024-02-09 | 中国信息通信研究院 | Beam management method and device for intermediate node |
| CN115706685A (en) * | 2021-08-06 | 2023-02-17 | 大唐移动通信设备有限公司 | Beam quality monitoring method, device, equipment and medium |
| CN115915167A (en) * | 2021-08-06 | 2023-04-04 | 华为技术有限公司 | Communication method and communication device |
| WO2023087175A1 (en) * | 2021-11-17 | 2023-05-25 | Nec Corporation | Method, device and computer readable medium for communications |
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| CN110691415B (en) * | 2018-07-06 | 2022-11-01 | 大唐移动通信设备有限公司 | Random access method and terminal |
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