CN111479289B - Cell switching method, device and readable medium - Google Patents
Cell switching method, device and readable medium Download PDFInfo
- Publication number
- CN111479289B CN111479289B CN201910069594.4A CN201910069594A CN111479289B CN 111479289 B CN111479289 B CN 111479289B CN 201910069594 A CN201910069594 A CN 201910069594A CN 111479289 B CN111479289 B CN 111479289B
- Authority
- CN
- China
- Prior art keywords
- cell
- target cell
- node
- random access
- measurement information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000005259 measurement Methods 0.000 claims abstract description 32
- 238000004891 communication Methods 0.000 claims abstract description 24
- 230000000977 initiatory effect Effects 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000011084 recovery Methods 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 15
- 230000006870 function Effects 0.000 description 12
- 238000012545 processing Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a cell switching method, a device and a readable medium, wherein the method comprises the following steps: in the BFR process, a child node acquires a candidate beam set, wherein the candidate beam set comprises measurement information of an adjacent cell; determining a target cell meeting cell switching conditions according to the measurement information of each adjacent cell in the candidate beam set; and initiating a random access channel request to the target cell to switch to the target cell. Since the candidate beam set carries the measurement information of the neighboring cell, the child node can determine the target cell meeting the cell switching condition based on the measurement information of the neighboring cell, and then the child node can initiate a random access request to the target cell to access the target cell, thereby effectively realizing the rapid switching of the cell and avoiding the influence on the communication of the subsequent child node.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a cell switching method, apparatus, and readable medium.
Background
In a 5G hot spot high-capacity scene, such as a market, a square, an airport and the like, the transmission rate of downlink data can reach 300Mbps, the transmission rate of uplink data can reach 50Mbps, the transmission rate of downlink capacity can reach 750Gbps/km2, and the transmission rate of uplink capacity can reach 125Gbps/km2. To support such high transmission rates and capacities, large bandwidths and dense deployments are required, and high frequency millimeter waves can meet this demand. Due to the limited coverage of the high-frequency millimeter waves, intensive deployment is needed, and in order to reduce the dependence on optical fibers and the cost, an Access and Backhaul (IAB) technology needs to be used, so that a Backhaul function is added on the basis of meeting the Access function of a base station.
In the IAB scenario, multi-hop and multi-connection are supported, and refer to two topologies, namely, a Spanning Tree (ST) and a Directed Acyclic Graph (DAG), shown in fig. 1. When Radio Link Failure (RLF) occurs between an IAB Node and a parent Node, if a parent link is switched in time, the child Node and nodes with larger subsequent hop count will not be affected, otherwise, communication interruption of a superior Node will seriously affect communication of subsequent nodes.
For an IAB non-multi-connection scenario, a child node initiates a Beam Failure Recovery (BFR) process after detecting a Beam Failure (BF), which mainly has the following conditions:
(1) In the BFR process, meeting the condition of cell switching, and switching the cell, wherein the child node is replaced by a neighbor node;
(2) When the BFR fails to cause RLF, the child node initiates a Radio Resource Control (RRC) reconstruction flow;
(3) BFR succeeds, but meets the cell switching condition, to switch the cell;
(4) BFR succeeds but does not satisfy the cell handover conditions and the child node still maintains communication with the current parent node.
For the first three cases, it is necessary to undergo a BFR procedure, and also to undergo a cell handover or RRC reestablishment procedure, which takes a long time and affects the communication of subsequent child nodes.
Therefore, how to quickly implement cell handover to reduce the influence on the communication of the subsequent child nodes is one of the considerable technical problems.
Disclosure of Invention
Embodiments of the present invention provide a cell switching method, a cell switching device, and a readable medium, which are used to quickly implement cell switching to quickly recover a communication link without affecting communication of a subsequent child node.
In a first aspect, an embodiment of the present invention provides a cell handover method, including:
in the BFR process of beam failure recovery, acquiring a candidate beam set, wherein the candidate beam set comprises measurement information of an adjacent cell;
determining a target cell meeting cell switching conditions according to the measurement information of each adjacent cell in the candidate beam set;
and initiating a random access channel request to the target cell to switch to the target cell.
Optionally, determining a target cell meeting a cell handover condition according to measurement information of each neighboring cell in the candidate beam set specifically includes:
determining a neighboring cell with the beam quality greater than a first preset threshold;
selecting a cell from the adjacent cells with the beam quality larger than a first preset threshold value as a target cell.
Optionally, before initiating the random access channel request to the target cell, the method further includes:
and determining that the beam quality of the current cell is smaller than a second preset threshold, wherein the second preset threshold is smaller than the first preset threshold.
Optionally, the initiating a random access channel request to the target cell specifically includes:
acquiring random access indication information of a target cell;
and initiating a random access channel request to the target cell according to the random access indication information.
Optionally, the random access indication information includes a random access preamble and/or a random access channel resource.
Optionally, the measurement information includes reference signal received power L3-RSRP of layer 3.
In a second aspect, an embodiment of the present invention provides a cell switching apparatus, including:
the device comprises an acquisition unit, a sending unit and a receiving unit, wherein the acquisition unit is used for acquiring a candidate beam set in the BFR process of beam failure recovery, and the candidate beam set comprises measurement information of a neighbor cell;
a first determining unit, configured to determine, according to measurement information of each neighboring cell in the candidate beam set, a target cell that satisfies a cell handover condition;
a sending unit, configured to initiate a random access channel request to the target cell to switch to the target cell.
Optionally, the first determining unit is specifically configured to determine a neighboring cell whose beam quality is greater than a first preset threshold; selecting a cell from the adjacent cells with the beam quality larger than a first preset threshold value as a target cell.
Optionally, the apparatus further comprises:
the second determining unit is configured to determine that the beam quality of the current cell is smaller than a second preset threshold, where the second preset threshold is smaller than the first preset threshold, before the sending unit initiates the random access channel request to the target cell.
Optionally, the sending unit is specifically configured to obtain random access indication information of a target cell; and initiating a random access channel request to the target cell according to the random access indication information.
Optionally, the random access indication information includes a random access preamble and/or a random access channel resource.
Optionally, the measurement information includes reference signal received power L3-RSRP of layer 3.
In a third aspect, an embodiment of the present invention provides a communication device, including a memory, a processor, and a computer program stored in the memory and executable on the processor; the processor, when executing the program, implements the cell handover method as any one of the methods provided herein.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the cell handover method according to any one of the embodiments provided in this application.
The invention has the beneficial effects that:
according to the cell switching method, the cell switching device and the readable medium provided by the embodiment of the invention, after a beam link between a child node and a parent node fails, the child node can initiate BFR, and in the BFR process, the child node acquires a candidate beam set, wherein the candidate beam set comprises measurement information of a neighbor cell; determining a target cell meeting cell switching conditions according to the measurement information of each adjacent cell in the candidate beam set; and initiating a random access channel request to the target cell to switch to the target cell. Since the candidate beam set carries the measurement information of the neighboring cell, the child node can determine the target cell meeting the cell switching condition based on the measurement information of the neighboring cell, and then the child node can initiate a random access request to the target cell to access the target cell, thereby effectively realizing the fast switching of the cell and avoiding the influence on the communication of the subsequent child node.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of two topologies provided by the prior art;
fig. 2 is a scene schematic diagram of an IAB scene according to an embodiment of the present invention;
fig. 3a is a schematic diagram illustrating a first scenario of failure recovery of a backhaul link according to an embodiment of the present invention;
fig. 3b is a diagram illustrating a second scenario of failure recovery of a backhaul link according to an embodiment of the present invention;
fig. 3c is a diagram illustrating a third scenario of failure recovery of a backhaul link according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a cell handover method according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of obtaining a candidate beam set according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of determining a target cell satisfying a cell handover condition according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of a process of initiating a random access channel request to the target cell according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a communication device implementing a cell handover method according to an embodiment of the present invention.
Detailed Description
The cell switching method, the cell switching device and the readable medium provided by the embodiment of the invention are used for quickly realizing cell switching so as to quickly recover a communication link without influencing the communication of subsequent child nodes.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, it being understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to be limiting of the present invention, and that the embodiments and features of the embodiments may be combined with each other without conflict.
To facilitate understanding of the present invention, the technical terms related to the present invention include:
in the IAB scenario, there is the following definition:
host base station/node (IAB donor/node): there is an anchor point where the optical fiber connects to the core network, such as the DgNB in fig. 2.
IAB node (IAB node): there is no optical fiber connection and core network, but backhaul can be done through wireless link, and nodes that can provide access functions, such as IAB1 and IAB2 in fig. 2. In standardization studies, an access function of an IAB node is called a Distributed node (DU) function, and a backhaul function is called a Mobile Termination (MT) function.
A mother node: the previous hop node of a certain IAB node, such as DgNB in fig. 2, is the parent node of IAB 1.
And (3) child nodes: the next hop node of a certain IAB node, such as IAB2 in fig. 2, is a child node of IAB 1.
And accessing a link: the links between the UE and the IAB node or IAB donor include uplink and downlink access links, such as 1a,2a and 3 links in fig. 2.
A return link: links between the IAB node and the IAB child node or the IAB parent node include uplink backhaul links and downlink backhaul links, such as the 1b and 2b links in fig. 2.
In TR38.874, a Backhaul-link-failure recovery (Backhaul) scenario is mainly described as follows:
in a first scenario, referring to fig. 3a, node C has two parent nodes B and E, and when RLF occurs between node B and C, node B can communicate with node C through node E without affecting the communication between nodes C and D.
In a second scenario, referring to fig. 3B, RLFs occur between node C and node B as well as between node E, and node C can only switch to node F to establish Radio Resource Control (RRC) connection with node F.
In a third scenario, referring to fig. 3C, RLF occurs between node D and node C, and node D switches to node H belonging to different IAB donors and establishes RRC connection with node H.
Based on the application scenario, in the BFR process, the existing node (cell) handover method is adopted to handover to an adjacent node (cell), but the existing cell handover process takes a long time.
The child node, the parent node and the IAB donor in the present invention can be understood as cells, which all provide communication services.
In order to solve the above problem and to implement fast cell handover, the present invention provides a cell handover method, which refers to the flowchart of the cell handover method shown in fig. 4, and may include the following steps:
s41, in the BFR process of beam failure recovery, a candidate beam set is obtained, and the candidate beam set comprises measurement information of adjacent cells.
The candidate beam set in the present invention includes measurement information of neighbor cells of the own cell (IAB node).
Taking the execution subject of fig. 4 as an IAB node for explanation, when a beam link between the IAB node and its parent node fails, the IAB node initiates beam failure recovery, and in the beam failure recovery process, in order to not affect communication of the IAB node, the cell switching method provided by the present invention is proposed to be implemented to quickly switch to a target cell (target node), thereby avoiding affecting communication of subsequent child nodes.
Specifically, the IAB node may obtain the candidate beam set in the present invention according to the process shown in fig. 5, including the following steps:
s51, determining a beam detection reference signal set q by an IAB node physical layer 0 。
In this step, a beam detection reference signal set q is determined 0 The reference signal may be, but is not limited to: a maximum of 2 Reference Signals (RSs), a periodic Channel state information-Reference Signal (CSI-RS), a Physical Downlink Control Channel (PDCCH) Transmission Configuration Indication (TCI) state (states), a periodic CSI-RS or a single Sideband Signal (SSB) indicated by PDCCH TCI states. Specifically, if there are 2 RSs, then the RS of QCL-type is selected.
And S52, when the IAB node physical layer determines that the current beam meets the beam failure judgment condition, the IAB node physical layer sends a beam failure indication to the IAB node MAC layer.
In this step, if the IAB node physical layer determines that 2 CORESETs all satisfy that the block error rate (BLER) of the PDCCH is greater than the threshold, that is, the PDCCH BLER>Threshold Q out,LR Then it is determined that the current beam link fails and then the direction of the beam link is changedThe IAB node MAC layer sends a Beam Failure Indication (BFI).
And S53, after receiving the beam failure indication, the IAB node MAC layer starts beam recovery.
In this step, the counter counts once every time the IAB node MAC layer receives a BFI. If the IAB node MAC layer determines that the BFI is not received after the Beam Failure Detection time (Beam Failure Detection Timer) is exceeded, resetting a counter; if BFI which is not less than the set number of times is continuously received, determining that a Beam link fails, then starting Beam Recovery, and simultaneously starting a Beam Failure Recovery Timer. It should be noted that the set number of times may be, but is not limited to, a fixed maximum number of times of Beam Failure (Beam Failure isolation Max Count).
S54, measuring alternative beam set q by IAB node physical layer 1 。
In this step, after the MAC layer starts the beam recovery function, the IAB node physical layer determines an alternative beam set, which is q 1 The reference signal of the beam in (a) may be, but is not limited to: periodic CSI-RS or SSB.
S55, the IAB node physical layer sets the alternative beams q 1 And sending the information to an IAB node higher layer.
In this step, the IAB node physical layer may also measure the reference signal received power, i.e., L1-RSRP, of layer 1 of the reference signal of the neighboring cell corresponding to the beam in the candidate beam set, and then satisfy the threshold Q in,LR The CRI/SSB ID and the L1-RSRP are reported to the IAB node higher layer.
S56, the IAB node high layer selects a plurality of beams from the alternative beam set, and the selected beams form an alternative beam set q new 。
In the step, after the CRI/SSBID and the L1-RSRP are received by the high-level Higher Layer, a candidate beam set q is selected and indicated new Sent to the physical layer and indicates a corresponding physical channel access channel resource (PRACH) to the physical layer.
S57, the IAB node high layer sets the candidate beams q new And sending the data to an IAB node physical layer.
By implementing the procedure shown in fig. 5, the IAB node can acquire a candidate beam set, where the candidate beam set carries measurement information of a neighboring cell.
Optionally, the measurement information comprises reference signal received power L3-RSRP of layer 3.
Specifically, the L3-RSRP is needed to be used for cell handover, and the measured L1-RSRP is L1-RSRP, so that the L3-RSRP is obtained by filtering the L1-RSRP.
And S42, determining a target cell meeting the cell switching condition according to the measurement information of each adjacent cell in the candidate beam set.
Specifically, step S42 may be implemented according to the flow shown in fig. 6, and includes the following steps:
s61, determining the adjacent cells of which the beam quality is greater than a first preset threshold value.
And S62, selecting a cell from the adjacent cells of which the beam quality is greater than a first preset threshold value as a target cell.
Specifically, the beam quality may be characterized by L3-RSRP, and for any neighboring cell, if the L3-RSRP of the neighboring cell is greater than a first preset threshold, it indicates that the beam quality of the neighboring cell is better. Based on the principle, the adjacent cells of which the L3-RSRP meets the conditions in the beam set can be determined, and then one cell is selected from the adjacent cells to be used as a target cell to be accessed. Specifically, a neighbor cell satisfying the maximum L3-RSRP in the above conditions may be selected as the target cell; optionally, the candidate beam set may further include location information of neighboring cells, and after determining all neighboring cells whose beam quality is greater than the first preset threshold, determine, based on the location information, a neighboring cell that is closer to the current cell as the target cell.
Optionally, after implementing step S42, before executing step S43, further comprising:
and determining that the beam quality of the current cell is smaller than a second preset threshold, wherein the second preset threshold is smaller than the first preset threshold.
Specifically, if it is determined that the beam quality of the current cell is poor, the fast handover to the target cell determined by the procedure shown in fig. 6 may be initiated. Describing by taking the example that the beam quality is characterized by L3-RSRP, if the L3-RSRP of the current cell is less than a second preset threshold, the beam quality of the current cell is poor, and cell switching is initiated; if the beam quality of the current cell is not poor, the communication service of the current cell can be ensured, and cell switching is not needed.
S43, initiating a random access channel request to the target cell to switch to the target cell.
In this step, step S43 may be implemented according to the flow shown in fig. 7, and includes the following steps:
and S71, acquiring the random access indication information of the target cell.
Optionally, the random access indication information in the present invention may include, but is not limited to: random access preamble (preamble) and/or random access channel Resource (RACH), etc.
Specifically, a parent node of a current cell (child node) interacts with other parent nodes in advance, so that information such as preambles and RACH resources of other parent nodes can be obtained, and then the parent node issues the preambles and RACH resources of other parent nodes to the current cell.
And S72, initiating a random access channel request to the target cell according to the random access indication information.
Specifically, the current cell may store the preamble and RACH resources of other parent nodes after receiving the preamble and RACH resources. When the cell handover needs to be initiated is determined, after the target cell is determined, the preamble and RACH resources of the target cell can be determined from locally stored preamble and RACH resources of other parent nodes, and then a random access request is initiated to the target cell according to the preamble and RACH resources of the current cell so as to rapidly access the target cell.
According to the cell switching method provided by the invention, after a beam link between a child node and a parent node fails, the child node can initiate BFR, and in the BFR process, the child node acquires a candidate beam set, wherein the candidate beam set comprises measurement information of an adjacent cell; determining a target cell meeting cell switching conditions according to the measurement information of each adjacent cell in the candidate beam set; and initiating a random access channel request to the target cell to switch to the target cell. Since the candidate beam set carries the measurement information of the neighboring cell, the child node can determine the target cell meeting the cell switching condition based on the measurement information of the neighboring cell, and then the child node can initiate a random access request to the target cell to access the target cell, thereby effectively realizing the fast switching of the cell and avoiding the influence on the communication of the subsequent child node.
Optionally, because a beam link between the child node and the parent node fails, which causes that the child node and the parent node cannot communicate with each other, BFR recovery also needs to be performed, and specifically, the beam link between the child node and the parent node may be recovered according to an existing procedure, which is not described in detail herein.
Based on the same inventive concept, the embodiment of the present invention further provides a cell switching apparatus, and as the principle of the apparatus for solving the problem is similar to the cell switching method, the implementation of the apparatus may refer to the implementation of the method, and repeated details are not repeated.
As shown in fig. 8, a schematic structural diagram of a cell switching apparatus provided in an embodiment of the present invention includes:
an obtaining unit 81, configured to obtain a candidate beam set in a BFR recovery process after a beam failure, where the candidate beam set includes measurement information of a neighboring cell;
a first determining unit 82, configured to determine, according to measurement information of each neighboring cell in the candidate beam set, a target cell that meets a cell switching condition;
a sending unit 83, configured to initiate a random access channel request to the target cell to switch to the target cell.
Optionally, the first determining unit 82 is specifically configured to determine a neighboring cell whose beam quality is greater than a first preset threshold; selecting a cell from the adjacent cells with the beam quality larger than a first preset threshold value as a target cell.
Optionally, the apparatus further comprises:
the second determining unit 84 is configured to determine that the beam quality of the current cell is smaller than a second preset threshold before the sending unit 83 initiates the random access channel request to the target cell, where the second preset threshold is smaller than the first preset threshold.
Optionally, the sending unit 83 is specifically configured to obtain random access indication information of a target cell; and initiating a random access channel request to the target cell according to the random access indication information.
Optionally, the random access indication information includes a random access preamble and/or a random access channel resource.
Optionally, the measurement information includes reference signal received power L3-RSRP of layer 3.
For convenience of description, the above parts are separately described as modules (or units) according to functional division. Of course, the functionality of the various modules (or units) may be implemented in the same or in multiple pieces of software or hardware in practicing the invention.
Based on the same technical concept, the embodiment of the present application further provides a communication device, which can implement the method in the foregoing embodiment.
Referring to fig. 9, which is a schematic structural diagram of a communication device for implementing a cell handover method according to an embodiment of the present invention, as shown in fig. 9, the communication device may include: a processor 901, a memory 902, a transceiver 903, and a bus interface.
The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in software form in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the cell switching method disclosed in the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 901 is configured to read a program in a memory and execute any step of any method described above.
Based on the same technical concept, the embodiment of the application also provides a computer storage medium. The computer-readable storage medium stores computer-executable instructions for causing the computer to perform any of the steps of any of the methods described above.
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. 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 invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method of cell handover, comprising:
after a beam between a child node and a parent node fails, acquiring a candidate beam set in the BFR process of beam failure recovery, wherein the candidate beam set comprises measurement information of an adjacent cell, the parent node is a previous hop node of an integrated access and return IAB node, and the child node is a next hop node of the IAB node;
determining a target cell meeting cell switching conditions according to the measurement information of each neighboring cell in the candidate beam set, which specifically includes: determining a neighboring cell of which the beam quality is greater than a first preset threshold; selecting a cell from the adjacent cells with the beam quality larger than a first preset threshold value as a target cell;
and initiating a random access channel request to the target cell to switch to the target cell.
2. The method of claim 1, prior to initiating a random access channel request to the target cell, further comprising:
and determining that the beam quality of the current cell is smaller than a second preset threshold, wherein the second preset threshold is smaller than the first preset threshold.
3. The method of claim 1, wherein initiating a random access channel request to the target cell specifically comprises:
acquiring random access indication information of a target cell;
and initiating a random access channel request to the target cell according to the random access indication information.
4. The method of claim 3, wherein the random access indication information comprises a random access preamble and/or random access channel resources.
5. The method of any of claims 1-4, wherein the measurement information comprises layer 3 reference signal received power, L3-RSRP.
6. A cell switching apparatus, comprising:
an obtaining unit, configured to obtain a candidate beam set in a BFR recovery process after a beam failure between a child node and a parent node, where the candidate beam set includes measurement information of a neighboring cell, the parent node is a previous-hop node integrating access and backhaul to an IAB node, and the child node is a next-hop node of the IAB node;
a first determining unit, configured to determine, according to measurement information of each neighboring cell in the candidate beam set, a target cell that satisfies a cell switching condition;
the first determining unit is specifically configured to determine a neighboring cell whose beam quality is greater than a first preset threshold; selecting a cell from the adjacent cells of which the beam quality is greater than a first preset threshold value as a target cell;
a sending unit, configured to initiate a random access channel request to the target cell to switch to the target cell.
7. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; wherein the processor implements the cell handover method of any one of claims 1 to 5 when executing the program.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of a cell handover method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069594.4A CN111479289B (en) | 2019-01-24 | 2019-01-24 | Cell switching method, device and readable medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069594.4A CN111479289B (en) | 2019-01-24 | 2019-01-24 | Cell switching method, device and readable medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111479289A CN111479289A (en) | 2020-07-31 |
| CN111479289B true CN111479289B (en) | 2023-01-13 |
Family
ID=71743936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910069594.4A Active CN111479289B (en) | 2019-01-24 | 2019-01-24 | Cell switching method, device and readable medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111479289B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113810958A (en) * | 2020-06-12 | 2021-12-17 | 索尼公司 | Electronic device and method for wireless communication, computer-readable storage medium |
| CN114071601A (en) * | 2020-08-04 | 2022-02-18 | 大唐移动通信设备有限公司 | Node switching method and device |
| WO2022205389A1 (en) * | 2021-04-01 | 2022-10-06 | 富士通株式会社 | Condition reconfiguration method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108811092A (en) * | 2017-04-28 | 2018-11-13 | 维沃移动通信有限公司 | Wave beam failure recovery processing method, terminal and network side equipment |
| CN109076556A (en) * | 2018-07-25 | 2018-12-21 | 北京小米移动软件有限公司 | Accidental access method, device, electronic equipment and computer readable storage medium |
| WO2018237400A1 (en) * | 2017-06-23 | 2018-12-27 | Huawei Technologies Co., Ltd. | Unified rlf detection, multi-beam rlm, and full-diversity bfr mechanisms in nr |
| CN109121223A (en) * | 2017-06-26 | 2019-01-01 | 北京三星通信技术研究有限公司 | Method and user equipment, the base station equipment of random access |
| CN109156039A (en) * | 2018-08-07 | 2019-01-04 | 北京小米移动软件有限公司 | Information uploading method, device, terminal and storage medium |
-
2019
- 2019-01-24 CN CN201910069594.4A patent/CN111479289B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108811092A (en) * | 2017-04-28 | 2018-11-13 | 维沃移动通信有限公司 | Wave beam failure recovery processing method, terminal and network side equipment |
| WO2018237400A1 (en) * | 2017-06-23 | 2018-12-27 | Huawei Technologies Co., Ltd. | Unified rlf detection, multi-beam rlm, and full-diversity bfr mechanisms in nr |
| CN109121223A (en) * | 2017-06-26 | 2019-01-01 | 北京三星通信技术研究有限公司 | Method and user equipment, the base station equipment of random access |
| CN109076556A (en) * | 2018-07-25 | 2018-12-21 | 北京小米移动软件有限公司 | Accidental access method, device, electronic equipment and computer readable storage medium |
| CN109156039A (en) * | 2018-08-07 | 2019-01-04 | 北京小米移动软件有限公司 | Information uploading method, device, terminal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111479289A (en) | 2020-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2018201541B2 (en) | Autonomous connection switching in a wireless communication network | |
| US20200373992A1 (en) | Contention based random access for beam failure recovery | |
| RU2737868C1 (en) | Wireless communication device and method of transmitting service in new radio based on network-controlled beam | |
| US11470517B2 (en) | Two-step addition of a primary-secondary cell, PSCell, in a multi-connected handover | |
| US20160242224A1 (en) | Mobile terminal communication control methods, devices and related equipment | |
| CN112005569A (en) | Electronic device and method for beam fault recovery | |
| US11290924B2 (en) | Communication method and communications device for improved handover with changed common system information | |
| CN111479289B (en) | Cell switching method, device and readable medium | |
| US20220279403A1 (en) | Information transmission method and apparatus, storage medium and electronic apparatus | |
| WO2019149023A1 (en) | Relay transmission method and device | |
| JP6547063B2 (en) | Device-to-device communication method, device, and system | |
| US10383009B2 (en) | Handover of a terminal in dual connectivity mode | |
| WO2023151063A1 (en) | Measurement relaxation method and apparatus, device, and storage medium | |
| WO2018192705A1 (en) | Automatic management of pre-configuration levels for autonomous ue mobility | |
| US10757686B2 (en) | Method and user equipment for requesting common information from an access node | |
| US9370025B1 (en) | Contention free preamble reuse based on latency metrics | |
| WO2021230784A1 (en) | Methods, wireless devices and ran nodes for handling coverage holes in cells | |
| KR102247314B1 (en) | Method and apparatus for recovering radio link failure in mobile communication system | |
| US11758437B2 (en) | Link reconfiguration processing method and related products | |
| CN109155953B (en) | Cell switching method and device | |
| KR102640815B1 (en) | Random access method, data receiving method and device thereof, and communication system | |
| KR20220164578A (en) | Radio link failure information reporting method, acquisition method, terminal and network-side device | |
| CN104519589A (en) | Random access method and device | |
| WO2016192058A1 (en) | Air interface synchronization method, apparatus and system | |
| CN117917125A (en) | Optimizing method, optimizing device, optimizing equipment and optimizing storage medium for adding conditional primary and secondary cells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |