CN111818568A - Random access method and equipment - Google Patents
Random access method and equipment Download PDFInfo
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- CN111818568A CN111818568A CN201910621409.8A CN201910621409A CN111818568A CN 111818568 A CN111818568 A CN 111818568A CN 201910621409 A CN201910621409 A CN 201910621409A CN 111818568 A CN111818568 A CN 111818568A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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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
Abstract
The embodiment of the invention discloses a method and equipment for random access, wherein the method comprises the following steps: determining the congestion state of a target frequency band; and initiating a random access process on the target frequency band or not initiating the random access process on the target frequency band according to the congestion state. According to the method provided by the embodiment of the invention, the congestion state of the target frequency band for initiating the random access process is considered before the terminal equipment initiates the random access process, so that the terminal equipment is facilitated to initiate a proper random access process or abandon the initiation of the random access process, and the probability of random access failure caused by channel congestion is reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for random access.
Background
In a mobile communication system, if a terminal device needs to send uplink data, uplink Timing synchronization needs to be achieved through a random access process, that is, uplink Timing Advance (TA) information is obtained from a network. After uplink synchronization is achieved, the terminal device may send uplink data through dynamic scheduling or semi-static scheduling.
Usually, a terminal device initiates a 4-Step Random Access Channel (RACH) procedure to implement uplink timing synchronization. In order to enable future mobile communication systems (e.g., 5G) to adapt to more diversified scenarios and service requirements, currently, the terminal device may also implement uplink timing synchronization through a RACH procedure including 2 steps (2-Step).
In the above situation, how to initiate the random access procedure when the terminal device performs the random access is a problem to be solved.
Disclosure of Invention
The embodiment of the invention aims to provide a random access method and equipment, so as to solve the problem of how to initiate a random access process by terminal equipment.
In order to solve the above problem, the embodiment of the present invention is implemented as follows:
in a first aspect, a method for random access is provided, which is applied to a terminal device, and the method includes:
determining the congestion state of a target frequency band;
and initiating a random access process on the target frequency band or not initiating the random access process on the target frequency band according to the congestion state.
In a second aspect, a method for random access is provided, which is applied to a network device, and includes:
sending configuration information to a terminal device, wherein the configuration information is used for indicating whether the terminal device performs congestion state evaluation before initiating a random access process, so that the terminal device determines the congestion state of a target frequency band under the condition that the configuration information indicates that the terminal device performs the congestion state evaluation before initiating the random access process, and initiates the random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state.
In a third aspect, a terminal device is provided, which includes:
the processing module is used for determining the congestion state of the target frequency band;
the processing module is further configured to initiate a random access procedure on the target frequency band or not according to the congestion state.
In a fourth aspect, a network device is provided, the network device comprising:
a transceiver module, configured to send configuration information to a terminal device, where the configuration information is used to indicate whether the terminal device performs congestion state evaluation before initiating a random access process, so that the terminal device determines a congestion state of a target frequency band under the condition that the configuration information indicates that the terminal device performs congestion state evaluation before initiating the random access process, and initiates the random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state.
In a fifth aspect, a terminal device is provided, the terminal device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.
In a sixth aspect, a network device is provided, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the second aspect.
In a seventh aspect, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium has stored thereon a computer program, which when executed by a processor implements the steps of the method according to the first aspect.
In an eighth aspect, a computer-readable storage medium is provided, wherein a computer program is stored on the computer-readable storage medium, which computer program, when executed by a processor, performs the steps of the method according to the second aspect.
In the embodiment of the invention, the terminal equipment determines the congestion state of the target frequency band before initiating the random access process, and then initiates the random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state. Because the congestion state of the target frequency band for initiating the random access process is considered before initiating the random access process, the method is beneficial to the terminal equipment to initiate a proper random access process or abandon the initiation of the random access process so as to reduce the probability of random access failure caused by channel congestion.
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 flow diagram of a method of random access according to one embodiment of the present invention.
Fig. 2 is a schematic flow diagram of a 2-step random access procedure in accordance with one embodiment of the present invention.
Fig. 3 is a schematic flow chart of a method of random access according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a terminal device according to still another embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a network device according to still another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the embodiment of the invention can be applied to various communication systems, such as: long Term Evolution (LTE)/enhanced Long Term Evolution (LTE-a) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, 5G system, or New Radio (NR) system, etc.
In an embodiment of the present invention, a Terminal Equipment (UE), which may also be referred to as a Mobile Terminal (Mobile Terminal), an access Terminal, a subscriber unit, a subscriber station, a Mobile station, a remote Terminal, a Mobile device, a User Terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may be, for example, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a terminal device in a 5G network, or may be a user-side device in a later-evolved version, and the invention is not limited thereto.
In the embodiment of the present invention, the network device is a device deployed in a radio access network for providing a terminal device with a wireless communication function. The network device may be, for example, a base station, and the base station may be an evolved Node B (eNB) or an e-NodeB in LTE, a 5G base station (gNB), or a network end device in a subsequent evolution version, which is not limited in this respect.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 illustrates a method of random access according to an embodiment of the present invention. The method as shown in 1 may be performed by a terminal device. As shown in fig. 1, the method comprises:
s110, determining the congestion state of the target frequency band.
It will be appreciated that the agreement may be made as to whether the terminal device is to perform the assessment of the congestion status prior to initiating the random access procedure.
Alternatively, it may be configured by the network whether the terminal device performs the evaluation of the congestion status before initiating the random access procedure. In this case, the method shown in fig. 1 further includes: and receiving configuration information, wherein the configuration information is used for indicating whether the terminal equipment evaluates the congestion state before initiating the random access process. Correspondingly, in S110, determining the congestion state of the target frequency band includes: and if the configuration information indicates that the terminal equipment evaluates the congestion state before initiating the random access process, determining the congestion state of the target frequency band.
For example, the configuration information is carried by 1 bit, and if the value of the bit is "0", the terminal device is instructed to evaluate the congestion state before initiating the random access process. And if the bit value is '1', indicating that the terminal equipment does not evaluate the congestion state before initiating the random access process.
And S120, initiating a random access process on the target frequency band or not initiating the random access process on the target frequency band according to the congestion state.
It should be noted that, in the embodiment of the present invention, a manner of characterizing the congestion state is not limited.
Optionally, in some embodiments, the congestion status is characterized by a measured value of a congestion parameter. Correspondingly, in S120, initiating a random access procedure on the target frequency band or not according to the measured value of the congestion parameter, including: and initiating a random access process on the target frequency band or not according to the measured value of the congestion parameter.
The congestion parameter herein may include at least one of: received Signal Strength Indicator (RSSI); channel Occupancy (CR); and, Channel Busy Rate (CBR).
The initiating a random access procedure on the target frequency band according to the measured value of the congestion parameter includes one of the following modes:
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, initiating a 2-step random access process;
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate a 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate the 2-step random access process; and the number of the first and second groups,
and if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 2-step random access process or initiating the 4-step random access process.
Fig. 2 shows an interaction process of a network device and a terminal device in a 2-step (2-step) random access process. Specifically, in step 0, the network device configures configuration information of 2-step random access to the terminal device, where the configuration information may include, for example, sending resource information corresponding to MsgA and MsgB. In step 1, the terminal device triggers a 2-step Random Access procedure, and sends request information (MsgA, including data information and control information) to the network device (e.g., sending data information through a Physical Uplink Shared Channel (PUSCH) and sending control information through a Physical Random Access Channel (PRACH)). In step 2, the network device sends a confirmation message (MsgB) to the terminal device, and retransmits MsgA if the terminal device fails to receive MsgB.
In addition, in the 4-step random access process, the terminal device sends Msg 1 (random access request) to the network device. After receiving the Msg 1, the network device sends Msg 2 (Random access response, RAR)) to the terminal device, where the Msg 2 carries the uplink authorization information. The terminal device may execute a Media Access Control (MAC) layer packet function according to the uplink authorization information in the Msg 2 to generate a MAC Protocol Data Unit (PDU), store the MAC PDU in the Msg 3 cache, and then send the MAC PDU in the Msg 3 through a Hybrid Automatic Repeat ReQuest (HARQ) process. And the network device sends the Msg 4 (such as a competition resolving identifier) to the terminal device after receiving the Msg 3. And after receiving the Msg 4, the terminal equipment judges whether the competition resolving is successful or not, if so, the random access process is successful, and otherwise, the random access process is initiated again. For the reinitiated random access process, after the terminal equipment receives the uplink authorization information in the Msg 2, the terminal equipment directly takes out the previously stored MAC PDU from the Msg 3 cache and sends the MAC PDU through the HARQ process. And the terminal equipment empties the HARQ buffer of the Msg 3 transmission in the random access process after the random access process is finished.
In the following, how the terminal device initiates the random access procedure on the target frequency band based on the measured value of the congestion parameter will be described in detail with reference to specific examples.
Example a:
in some embodiments, the terminal device initiates a 2-step random access procedure if the measured value of the congestion parameter is greater than or equal to the measurement threshold value. Therefore, the random access process which needs less transceiving times is adopted under the condition that the channel is congested, and random access failure caused by channel congestion can be reduced.
Example b:
in some embodiments, if the measured value of the congestion parameter is greater than or equal to the measurement threshold value, the terminal device does not initiate a random access procedure on random access resources that can only be used to initiate a 4-step random access procedure, i.e. the terminal device does not select random access resources that are unique to the 4-step random access procedure.
For example, the network device configures a PRACH resource 1 (e.g., Random access opportunity (RO) 1), a PRACH resource 2 (e.g., RO 2), and a PRACH resource 3 (e.g., RO 3) to a Bandwidth Part (BWP) 1 of the terminal device. Wherein, RO1 is only allocated to 2-step random access procedure, RO 2 is only allocated to 4-step random access procedure, RO 3 is allocated to 2-step random access procedure and 4-step random access procedure. When the RSSI measurement value of BWP 1 is greater than or equal to the RSSI measurement threshold value, the terminal device does not select RO 2, but may select either RO1 or RO 3 to initiate the random access procedure.
Example c:
in some embodiments, the terminal device initiates a 4-step random access procedure if the measured value of the congestion parameter is less than or equal to the measurement threshold value.
Example d:
in some embodiments, if the measured value of the congestion parameter is less than or equal to the measurement threshold value, the terminal device does not initiate a random access procedure on random access resources that are only capable of initiating a 2-step random access procedure, i.e. the terminal device does not select random access resources that are unique to the 2-step random access procedure.
For example, the network device configures a PRACH resource 1 (e.g., RO 1), a PRACH resource 2 (e.g., RO 2), and a PRACH resource 3 (e.g., RO 3) to the BWP 1 of the terminal device. Wherein, RO1 is only allocated to 2-step random access procedure, RO 2 is only allocated to 4-step random access procedure, RO 3 is allocated to 2-step random access procedure and 4-step random access procedure. When the measured value of RSSI of BWP 1 is less than or equal to the RSSI measurement threshold value, the terminal device does not select RO1, but may select RO 2 or RO 3 to initiate the random access procedure.
Example e:
in some embodiments, if the measured value of the congestion parameter is less than or equal to the measurement threshold value, the terminal device initiates a 2-step random access procedure or initiates a 4-step random access procedure.
In other words, the terminal device allows to initiate both the 4-step and the 2-step random access procedure if the measured value of the congestion parameter is smaller than or equal to the measurement threshold value.
In this example, there is no restriction on how the terminal device selects whether to initiate the 4-step random access procedure or the 2-step random access procedure.
The above-mentioned not initiating the random access procedure on the target frequency band according to the measured value of the congestion parameter includes:
and if the measured value is greater than or equal to the measurement threshold value, not initiating a random access process on the target frequency band.
On the basis of all the embodiments described above, if it is configured by the network whether the terminal device performs the evaluation of the congestion status before initiating the random access procedure. The configuration information of the network device configuration terminal device further includes a measurement threshold value. The measurement threshold values here correspond to congestion parameters. For example, the measurement threshold value may include at least one of: an RSSI measurement threshold value, a CR measurement threshold value, and a CBR measurement threshold value.
As an example, the method of random access shown in fig. 1 is applied to a terminal device operating in an unlicensed frequency band.
The method of random access according to the embodiment of the present invention is described in detail above from the terminal device side in conjunction with fig. 1 and 2. A method of random access according to an embodiment of the present invention will be described in detail below from the network device side with reference to fig. 3. It should be noted that the interaction between the terminal device and the network device described from the network device side is the same as that described from the terminal device side, and the related description is appropriately omitted to avoid redundancy.
Fig. 3 is a method of random access according to still another embodiment of the present invention. The method of fig. 3 may be performed by a network device. As shown in fig. 3, the method includes:
s210, sending configuration information to a terminal device, where the configuration information is used to indicate whether the terminal device performs congestion state evaluation before initiating a random access process, so that the terminal device determines the congestion state of a target frequency band under the condition that the configuration information indicates that the terminal device performs congestion state evaluation before initiating the random access process, and initiates the random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state.
Optionally, as an embodiment, the congestion status is characterized by a measured value of a congestion parameter.
Optionally, as an embodiment, the congestion parameter includes at least one of:
a Received Signal Strength Indication (RSSI);
a channel occupancy rate CR; and the number of the first and second groups,
channel busy rate CBR.
Optionally, as an embodiment, the configuration information further includes a measurement threshold value.
The method for data transmission and the method for data reception according to the embodiment of the present invention are described in detail above with reference to fig. 1 to 3, and the terminal device according to the embodiment of the present invention will be described in detail below with reference to fig. 4.
Fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 4, the terminal device 40 includes:
a processing module 41, configured to determine a congestion state of a target frequency band;
the processing module 41 is further configured to initiate a random access procedure on the target frequency band or not according to the congestion state.
Optionally, as an embodiment, the congestion status is characterized by a measured value of a congestion parameter;
wherein, the processing module 41 is specifically configured to:
and initiating a random access process on the target frequency band or not according to the measured value of the congestion parameter.
Optionally, as an embodiment, the processing module 41 is specifically configured to initiate a random access procedure on the target frequency band according to one of the following manners:
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, initiating a 2-step random access process;
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate a 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate the 2-step random access process; and the number of the first and second groups,
and if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 2-step random access process or initiating the 4-step random access process.
Optionally, as an embodiment, the processing module 41 is specifically configured to:
and if the measured value is greater than or equal to the measurement threshold value, not initiating a random access process on the target frequency band.
Optionally, as an embodiment, the congestion parameter includes at least one of:
a Received Signal Strength Indication (RSSI);
a channel occupancy rate CR; and the number of the first and second groups,
channel busy rate CBR.
Optionally, as an embodiment, as shown in fig. 4, the terminal device further includes a transceiver module 42: the terminal equipment is used for receiving configuration information, and the configuration information is used for indicating whether the terminal equipment carries out the evaluation of the congestion state before initiating the random access process;
wherein, the processing module 41 is specifically configured to:
and if the configuration information indicates that the terminal equipment evaluates the congestion state before initiating the random access process, determining the congestion state of the target frequency band.
Optionally, as an embodiment, the configuration information further includes the measurement threshold value.
The terminal device provided in the embodiment of the present invention can implement each process implemented by the terminal device in the method embodiment shown in fig. 1, and is not described herein again to avoid repetition.
Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in fig. 5, the network device 50 includes:
a transceiver module 51, configured to send configuration information to a terminal device, where the configuration information is used to indicate whether the terminal device performs congestion state evaluation before initiating a random access process, so that the terminal device determines a congestion state of a target frequency band under the condition that the configuration information indicates that the terminal device performs congestion state evaluation before initiating the random access process, and initiates a random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state.
Optionally, as an embodiment, the congestion status is characterized by a measured value of a congestion parameter.
Optionally, as an embodiment, the congestion parameter includes at least one of:
a Received Signal Strength Indication (RSSI);
a channel occupancy rate CR; and the number of the first and second groups,
channel busy rate CBR.
Optionally, as an embodiment, the configuration information further includes the measurement threshold value.
The network device provided in the embodiment of the present invention can implement each process implemented by the network device in the method embodiment shown in fig. 3, and is not described here again to avoid repetition.
Fig. 6 is a block diagram of a terminal device according to still another embodiment of the present invention. The terminal device 600 shown in fig. 6 includes: at least one processor 601, memory 602, user interface 603, and at least one network interface 604. The various components in the terminal device 600 are coupled together by a bus system 605. It is understood that the bus system 605 is used to enable communications among the components. The bus system 605 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 605 in fig. 6.
The user interface 603 may include, among other things, a display, a keyboard, a pointing device (e.g., a mouse, trackball), a touch pad, or a touch screen.
It will be appreciated that the memory 602 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr SDRAM ), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 602 of the subject systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 6021 and application programs 6022.
The operating system 6021 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 program 6022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like, and is used to implement various application services. A program implementing the method of an embodiment of the invention can be included in the application program 6022.
In this embodiment of the present invention, the terminal device 600 further includes: a computer program stored in the memory 602 and capable of running on the processor 601, where the computer program when executed by the processor 601 implements the processes of the method described in fig. 1 above, and can achieve the same technical effects, and is not described herein again to avoid repetition.
The method disclosed by the above-mentioned embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or 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. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer-readable storage medium has stored thereon a computer program which, when executed by the processor 601, performs the steps of the method embodiment as described above with respect to fig. 1.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Fig. 7 shows a schematic structural diagram of a network device according to still another embodiment of the present invention. As shown in fig. 7, the network device 700 includes a processor 701, a transceiver 702, a memory 703, and a bus interface. Wherein:
in this embodiment of the present invention, the network device 700 further includes: a computer program stored in the memory 703 and capable of running on the processor 701, where the computer program, when executed by the processor 701, implements each process in the method shown in fig. 3, and can achieve the same technical effect, and is not described herein again to avoid repetition.
In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the method embodiments shown in fig. 1 to 3, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (21)
1. A random access method is applied to a terminal device, and is characterized by comprising the following steps:
determining the congestion state of a target frequency band;
and initiating a random access process on the target frequency band or not initiating the random access process on the target frequency band according to the congestion state.
2. The method of claim 1, wherein the congestion status is characterized by a measured value of a congestion parameter;
wherein, the initiating a random access procedure on the target frequency band or not according to the congestion status comprises:
and initiating a random access process on the target frequency band or not according to the measured value of the congestion parameter.
3. The method according to claim 2, wherein the initiating a random access procedure on the target frequency band according to the measured value of the congestion parameter comprises one of:
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, initiating a 2-step random access process;
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate a 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate the 2-step random access process; and the number of the first and second groups,
and if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 2-step random access process or initiating the 4-step random access process.
4. The method according to claim 2, wherein said not initiating a random access procedure on the target frequency band according to the measured value of the congestion parameter comprises:
and if the measured value is greater than or equal to the measurement threshold value, not initiating a random access process on the target frequency band.
5. The method according to any of claims 2 to 4, wherein the congestion parameters comprise at least one of:
a Received Signal Strength Indication (RSSI);
a channel occupancy rate CR; and the number of the first and second groups,
channel busy rate CBR.
6. The method of claim 5, further comprising:
receiving configuration information, wherein the configuration information is used for indicating whether the terminal equipment evaluates the congestion state before initiating a random access process;
wherein, the determining the congestion state of the target frequency band includes:
and if the configuration information indicates that the terminal equipment evaluates the congestion state before initiating the random access process, determining the congestion state of the target frequency band.
7. The method of claim 6, wherein the configuration information further comprises the measurement threshold value.
8. A random access method is applied to a network device, and is characterized by comprising the following steps:
sending configuration information to a terminal device, wherein the configuration information is used for indicating whether the terminal device performs congestion state evaluation before initiating a random access process, so that the terminal device determines the congestion state of a target frequency band under the condition that the configuration information indicates that the terminal device performs the congestion state evaluation before initiating the random access process, and initiates the random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state.
9. The method of claim 8, wherein the congestion status is characterized by a measured value of a congestion parameter.
10. The method of claim 9, wherein the congestion parameter comprises at least one of:
a Received Signal Strength Indication (RSSI);
a channel occupancy rate CR; and the number of the first and second groups,
channel busy rate CBR.
11. The method of claim 10, wherein the configuration information further comprises a measurement threshold value.
12. A terminal device, comprising:
the processing module is used for determining the congestion state of the target frequency band;
the processing module is further configured to initiate a random access process on the target frequency band or not initiate a random access on the target frequency band according to the congestion state.
13. A terminal device according to claim 12, wherein the congestion status is characterised by a measured value of a congestion parameter;
wherein the processing module is specifically configured to:
and initiating a random access process on the target frequency band or not initiating the random access process on the target frequency band according to the measured value of the congestion parameter.
14. The terminal device of claim 13, wherein the processing module is specifically configured to initiate a random access procedure on the target frequency band according to one of the following manners:
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, initiating a 2-step random access process;
if the measured value of the congestion parameter is larger than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate a 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 4-step random access process;
if the measured value of the congestion parameter is less than or equal to the measurement threshold value, not initiating a random access process on random access resources which can only initiate the 2-step random access process; and the number of the first and second groups,
and if the measured value of the congestion parameter is less than or equal to the measurement threshold value, initiating the 2-step random access process or initiating the 4-step random access process.
15. The terminal device of claim 13, wherein the processing module is specifically configured to:
and if the measured value is greater than or equal to the measurement threshold value, not initiating a random access process on the target frequency band.
16. The terminal device according to any of claims 13 to 15, wherein the congestion parameter comprises at least one of:
a Received Signal Strength Indication (RSSI);
a channel occupancy rate CR; and the number of the first and second groups,
channel busy rate CBR.
17. The terminal device according to claim 16, wherein the terminal device further comprises:
a transceiver module, configured to receive configuration information, where the configuration information is used to indicate whether the terminal device performs congestion state evaluation before initiating a random access procedure;
wherein the processing module is specifically configured to:
and if the configuration information indicates that the terminal equipment evaluates the congestion state before initiating the random access process, determining the congestion state of the target frequency band.
18. A network device, comprising:
a transceiver module, configured to send configuration information to a terminal device, where the configuration information is used to indicate whether the terminal device performs congestion state evaluation before initiating a random access process, so that the terminal device determines a congestion state of a target frequency band under the condition that the configuration information indicates that the terminal device performs congestion state evaluation before initiating the random access process, and initiates the random access process on the target frequency band or does not initiate the random access process on the target frequency band according to the congestion state.
19. 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 of random access according to any one of claims 1 to 7.
20. 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 of random access according to any of claims 8 to 11.
21. A computer readable medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of random access according to any one of claims 1 to 7; or steps of a method of implementing a random access according to any of claims 8 to 11.
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| CN201910621409.8A CN111818568B (en) | 2019-07-10 | 2019-07-10 | Random access method and equipment |
| PCT/CN2020/097792 WO2021004272A1 (en) | 2019-07-10 | 2020-06-23 | Random access method and device |
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