CN111836397B - Random access method, terminal and network side equipment - Google Patents
Random access method, terminal and network side equipment Download PDFInfo
- Publication number
- CN111836397B CN111836397B CN201910726739.3A CN201910726739A CN111836397B CN 111836397 B CN111836397 B CN 111836397B CN 201910726739 A CN201910726739 A CN 201910726739A CN 111836397 B CN111836397 B CN 111836397B
- Authority
- CN
- China
- Prior art keywords
- message
- random access
- msg3
- transmission
- terminal
- 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 71
- 230000005540 biological transmission Effects 0.000 claims abstract description 136
- 230000008569 process Effects 0.000 claims abstract description 28
- 238000004590 computer program Methods 0.000 claims description 22
- 101100274486 Mus musculus Cited2 gene Proteins 0.000 claims description 21
- 101150096622 Smr2 gene Proteins 0.000 claims description 21
- 238000004891 communication Methods 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 101100533725 Mus musculus Smr3a gene Proteins 0.000 description 5
- 238000007726 management method Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 102100039292 Cbp/p300-interacting transactivator 1 Human genes 0.000 description 1
- 101000888413 Homo sapiens Cbp/p300-interacting transactivator 1 Proteins 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000036963 noncompetitive effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
-
- 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)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a random access method, a terminal and network side equipment, and relates to the technical field of communication. The random access method is applied to a terminal and comprises the following steps: judging whether the transmission of the message three Msg3 corresponding to the current scheduling meets a preset condition or not; if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk, determining that the random access contention resolution is unsuccessful; wherein the preset conditions are as follows: the last Msg3 transmission. According to the scheme, when the Msg3 transmission corresponding to the current scheduling is the last Msg3 transmission and the terminal fails to listen before talk, the random access contention resolution is determined to be unsuccessful, a random access contention resolution timer does not need to be started, and the time delay of the random access process is reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a random access method, a terminal, and a network device.
Background
In an Unlicensed band (New radio, NR), for an uplink grant (UL grant) for transmitting or retransmitting a message three (Msg3), a User Equipment (User Equipment, UE, also called a terminal) needs to Listen Before Talk (Listen Before Talk, LBT), and the corresponding UL grant can be used only after success.
For example, the network sends a Msg3 schedule to the UE, the first schedule is in message two (Msg2), and the network has not successfully decoded the Msg3 sent by the UE. And scheduling the UE to perform first retransmission, and continuing to schedule second retransmission after decoding fails again until the last retransmission (Nth retransmission). After the decoding fails, the network no longer schedules the UE for the Msg3 retransmission. From the UE perspective, the UE may fail the Msg3 transmission if LBT fails after receiving the last retransmission schedule. According to the existing mechanism, even if the Msg3 transmission is not executed, the UE starts a random access contention resolution timer (ra-ContentionResolutionTimer), and after the timer is overtime, the UE can confirm that the random access retry fails, and executes a subsequent procedure.
However, since Msg3 was not sent at all, it is the last retransmission scheduled by the network. Therefore, during the ra-contentresourcontintertimer operation, the UE cannot receive the retransmission schedule of Msg3 or the network response message to Msg3, message four (Msg4), at which point it does not make any sense to start the ra-contentresourcontintertimer and delay is introduced.
Disclosure of Invention
The embodiment of the invention provides a random access method, a terminal and network side equipment, which aim to solve the problem that the time delay of a random access process is increased in the conventional mode of judging the random access failure by utilizing a random access contention resolution timer.
In order to solve the technical problem, the invention adopts the following scheme:
in a first aspect, an embodiment of the present invention provides a random access method, applied to a terminal, including:
judging whether the transmission of the message three Msg3 corresponding to the current scheduling meets the preset condition;
if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk, determining that the random access contention resolution is unsuccessful;
wherein the preset conditions are as follows: the last Msg3 transmission.
In a second aspect, an embodiment of the present invention provides a random access method, applied to a network side device, including:
sending a first message to a terminal;
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: the last Msg3 transmission.
In a third aspect, an embodiment of the present invention provides a terminal, including:
the judging module is used for judging whether the transmission of the message three Msg3 corresponding to the current scheduling meets the preset condition;
the determining module is used for determining that the random access contention resolution is unsuccessful if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk;
wherein the preset conditions are as follows: the last Msg3 transmission.
In a fourth aspect, an embodiment of the present invention provides a terminal, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the random access method described above when executed by the processor.
In a fifth aspect, an embodiment of the present invention provides a network side device, including:
the sending module is used for sending a first message to the terminal;
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: the last Msg3 transmission.
In a sixth aspect, an embodiment of the present invention provides a network side device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the random access method described above when executed by the processor.
In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the steps of the random access method described above.
The beneficial effects of the invention are:
according to the scheme, when the Msg3 transmission corresponding to the current scheduling is the last Msg3 transmission and the listening-before-speaking of the terminal fails, the random access contention resolution is determined to be unsuccessful, a random access contention resolution timer does not need to be started in the mode, and the time delay of the random access process is reduced.
Drawings
Fig. 1 shows a diagram of a contention random access procedure;
fig. 2 is a flowchart illustrating a random access method applied to a terminal according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a random access method applied to a network device according to an embodiment of the present invention;
fig. 4 shows a block diagram of a terminal according to an embodiment of the invention;
fig. 5 is a block diagram showing a configuration of a terminal according to an embodiment of the present invention;
fig. 6 is a block diagram of a network device according to an embodiment of the present invention;
fig. 7 is a block diagram showing a configuration of a network device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
In making the description of the embodiments of the present invention, some concepts used in the following description will first be explained.
1、Unlicensed band NR
In future communication systems, the Unlicensed Band can be used as a supplement to a Licensed Band (Licensed Band) to help an operator to expand the capacity of services. In order to maintain compliance with NR deployment and maximize NR-based unlicensed access as much as possible, unlicensed bands may operate in the 5GHz, 37GHz, and 60GHz bands. Since the unlicensed band is shared by multiple technologies (RATs), such as WiFi, radar, LTE-LAA, etc., in some countries or regions, the unlicensed band must meet the specification when being used to ensure that all devices can fairly use the resource, for example, LBT, Maximum Channel Occupancy Time (MCOT), etc.
2、LBT
A transmitting end working in an unlicensed frequency band needs to monitor whether the frequency band (which may be identified by a central frequency point + a bandwidth) is occupied before transmitting a signal, and if the frequency band is not occupied, the transmitting end may transmit a signal in the frequency band.
3. Random access procedure
The random access process mainly comprises the following steps: non-contention random access and contention random access. The specific process of the invention, which is directed to the contention random access process, is shown in fig. 1 and mainly comprises four steps:
message one (Msg 1): the terminal selects a random access resource and transmits a selected random access signal (i.e., a random access preamble) to the base station using the random access resource. The calculation mode of the random access radio network temporary identifier (RA-RNTI) and the random access response window (RAR window) is the same as the non-competitive random access process.
Msg 2: the base station receives the Msg1, calculates a Timing Advance (TA), and transmits a random access response to the terminal, wherein the random access response at least includes the timing advance information and a UL grant for the Msg 3.
Msg 3: the terminal sends uplink transmission on the UL grant specified by the Msg2, the content of the uplink transmission is different for different random access reasons Msg3, for example, for initial access, the Msg3 transmits an RRC connection establishment request. The terminal starts a contention resolution timer (ra-ContentionResolutionTimer) after sending the Msg 3. If the Msg4 has not been successfully received when the contention resolution timer times out, the UE determines that the Msg4 fails to receive; in case of the reception failure of the MSG4, the terminal terminates the random access procedure (in case of the number of attempts reaching the maximum number of retries N) or re-attempts the random access (back to the MSG1 transmission) (in case of the number of attempts not reaching the maximum number of retries N) after the random backoff wait. During the contention resolution timer running, the UE may also receive the Msg3 retransmission schedule sent by the base station. And under the condition that the base station fails to receive the Msg3, the base station allocates resources for the UE to carry out MSG3 retransmission through retransmission scheduling. After the terminal retransmits Msg3 (at the beginning of the first OFDM symbol after the Msg3 transmission ends), the terminal needs to restart the ra-ContentionResolutionTimer.
Msg 4: and the terminal can judge whether the random access is successful according to the Msg 4.
The invention provides a random access method, a terminal and network side equipment, aiming at the problem that the time delay of the random access process is increased by the conventional method for judging the random access failure by utilizing a random access contention resolution timer.
As shown in fig. 2, an embodiment of the present invention provides a random access method, which is applied to a terminal, and includes:
step 201, judging whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition;
it should be noted that the preset conditions are as follows: a last Msg3 transfer; it should be noted that the transmission here includes an initial transmission and a retransmission, and further, when the number of transmissions of Msg3 is 1, it indicates an initial transmission of Msg3, and when the number of transmissions of Msg3 is greater than 1, it indicates a retransmission of Msg 3.
Step 202, if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk, determining that the random access contention resolution is unsuccessful;
that is, when the above condition is satisfied, the terminal determines that random access contention resolution has failed (that is, the terminal considers that random access contention resolution has been unsuccessful as long as the above condition is satisfied), and in this case, the terminal considers that message four reception has failed.
It should be noted that, in this embodiment, when the Msg3 transmission corresponding to the current scheduling is the last Msg3 transmission or the last Msg3 retransmission, and the listen-before-talk of the terminal fails, it is determined that the random access contention resolution is unsuccessful, and in this way, the random access contention resolution timer does not need to be started.
It should be further noted that, the method according to the embodiment of the present invention further includes:
after a listen before talk failure or after a listen before talk failure and the duration of the sending resource for carrying Msg3 is over, the terminal performs one of the following operations:
terminating the random access process;
after the random backoff wait, the random access is resumed.
It should be further noted that, the specific implementation manner of step 201 is:
receiving a first message sent by network side equipment;
and judging whether the Msg3 transmission corresponding to the current scheduling meets a preset condition or not according to the first message.
It should be noted that, since the first message may be sent to the terminal by the network side device before the random access, or may be sent to the terminal by the network side device during the random access, in the following two cases, a specific implementation of the embodiment of the present invention is described as follows.
Firstly, the network side equipment sends the information to the terminal before random access
It should be noted that, in this case, the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
It should be noted here that the following relationship is satisfied between the maximum number of transmissions and the maximum number of retransmissions:
the maximum number of transmissions is equal to the maximum number of retransmissions +1, wherein the maximum number of retransmissions is greater than or equal to 0.
It should be further noted that the configuration message may be a broadcast message or a dedicated Radio Resource Control (RRC) message.
Taking the maximum transmission times of random access Msg3 indicated in the configuration message as an example, the real-time specific implementation process of the present invention is as follows:
step S11, the terminal receives the configuration message;
the configuration message includes the maximum transmission number of the random access Msg3, and may be a broadcast message or a dedicated RRC message (dedicated RRC signaling).
Step S12, when the terminal receives the schedule of Msg3, judging whether the transmission corresponding to the current schedule is the last transmission;
in other words, in this case, the transmission frequency corresponding to the current scheduling is compared with the maximum transmission frequency, if the transmission frequency corresponding to the current scheduling is equal to the maximum transmission frequency, it indicates that the transmission corresponding to the current scheduling is the last transmission, and if the transmission frequency corresponding to the current scheduling is not equal to the maximum transmission frequency, it indicates that the transmission corresponding to the current scheduling is not the last transmission.
Step S13, if not the last transmission, executing the subsequent random access flow according to the existing mechanism;
it should be noted that, when the number of transmission times corresponding to the current scheduling is not the last transmission, the terminal may continue LBT, and in case of successful LBT, perform Msg3 transmission; the UE starts the ra-ContentionResolutionTimer regardless of whether LBT is successful or not.
Step S14, if it is the last transmission and the Msg3 transmission is not performed because of LBT failure, the terminal considers that the random access contention resolution is not successful.
It should be further noted that, after the terminal fails to listen before talk, the terminal terminates the random access procedure when the number of attempts reaches the maximum retry number N, or after waiting for random backoff, the terminal returns to Msg1 to send and retries random access when the number of attempts does not reach the maximum retry number N; alternatively, the first and second electrodes may be,
after hearing-before-talk failure and the duration of the transmission resource for carrying the Msg3 is over, the terminal terminates the random access procedure when the number of attempts reaches the maximum retry number N, or returns to Msg1 for transmission and retries the random access when the number of attempts does not reach the maximum retry number N.
Secondly, the information is sent to the terminal by the network side equipment in the random access process
It should be noted that, when the network side device scheduling terminal performs Msg3 transmission only once, the first message is a random access message two (Msg2), the Msg2 includes first indication information, and the first indication information is used to indicate whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule.
When the network side equipment scheduling terminal retransmits the Msg3, the first message is a scheduling message, and the scheduling message is used for indicating whether the current retransmission scheduling is the last retransmission scheduling.
It should be further noted that the scheduling message may be a Physical Downlink Control Channel (PDCCH) scheduling command.
It should be further noted that whether the current retransmission scheduling is the last retransmission scheduling may be explicitly or implicitly indicated; specifically, the explicit indication contains an indication field; the implicit indication uses a new PDCCH format, which is scheduled for non-last retransmission when scheduled with PDCCH of the existing format, and for last retransmission when scheduled with the new format.
The real-time implementation process of the present invention under such a situation is described in detail as follows:
step S21, when the terminal receives the Msg3 scheduling, judging whether the transmission corresponding to the scheduling is the last transmission;
specifically, the indication is one of the following:
a11, indicating whether the current Msg3 initial transmission schedule is the last Msg3 schedule in the Msg 2;
it should be noted that, if the Msg2 indicates that the current Msg3 initial transmission schedule is the last Msg3 schedule, it is determined that the transmission corresponding to the current schedule is the last transmission, and if the Msg2 indicates that the current Msg3 initial transmission schedule is not the last Msg3 schedule, it is determined that the transmission corresponding to the current schedule is not the last transmission.
A12, indicating whether the current retransmission scheduling is the last Msg3 retransmission scheduling in a retransmission scheduling (PDCCH) of the Msg 3;
it should be noted that, if the current retransmission schedule is indicated as the last Msg3 retransmission schedule in the retransmission schedule of Msg3, it is determined that the transmission corresponding to the current schedule is the last transmission (i.e., the transmission corresponding to the current schedule is the last Msg3 retransmission), and if the current retransmission schedule is indicated as not the last Msg3 retransmission schedule in the retransmission schedule of Msg3, it is determined that the transmission corresponding to the current schedule is not the last transmission (i.e., the transmission corresponding to the current schedule is not the last Msg3 retransmission).
Step S22, if not the last transmission, executing the subsequent random access process according to the existing mechanism;
it should be noted that, when the transmission corresponding to the current scheduling is not the last transmission, the terminal continues LBT, and performs Msg3 transmission if LBT succeeds; the UE starts the ra-ContentionResolutionTimer regardless of whether LBT is successful.
Step S23, if it is the last transmission and the Msg3 transmission is not performed because of LBT failure, the terminal considers that the random access contention resolution is not successful.
It should be further noted that, after the terminal fails to listen before talk, the terminal terminates the random access procedure when the number of attempts reaches the maximum retry number N, or after waiting for random backoff, the terminal returns to Msg1 to send and retries random access when the number of attempts does not reach the maximum retry number N; alternatively, the first and second electrodes may be,
after hearing-before-talk failure and the duration of the transmission resource for carrying the Msg3 is over, the terminal terminates the random access procedure when the number of attempts reaches the maximum retry number N, or returns to Msg1 for transmission and retries the random access when the number of attempts does not reach the maximum retry number N.
It should be noted that, in the implementation manner of the embodiment of the present invention, the random access contention resolution timer does not need to be started, and the time delay of the random access process can be effectively reduced when the random access contention resolution timer times out.
As shown in fig. 3, an embodiment of the present invention further provides a random access method, which is applied to a network device, and includes:
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: the last Msg3 transmission.
Optionally, the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
Specifically, the configuration message is a broadcast message or a dedicated radio resource control RRC message.
Optionally, the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used to indicate whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule.
Optionally, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
It should be noted that all the descriptions regarding the network side device in the foregoing embodiments are applicable to the embodiment of the random access method, and the same technical effects can be achieved.
As shown in fig. 4, an embodiment of the present invention provides a terminal 400, including:
the determining module 401 is configured to determine whether transmission of a message three Msg3 corresponding to current scheduling meets a preset condition;
a determining module 402, configured to determine that the random access contention resolution is unsuccessful if the Msg3 transmission meets a preset condition and the terminal fails to listen before talk;
wherein the preset conditions are as follows: the last Msg3 transmission.
Optionally, the determining module 401 includes:
the receiving unit is used for receiving a first message sent by the network side equipment;
and the judging unit is used for judging whether the Msg3 transmission corresponding to the current scheduling meets the preset condition or not according to the first message.
Further, the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
Specifically, the configuration message is a broadcast message or a dedicated radio resource control RRC message.
Further, the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used for indicating whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule.
Further, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
Optionally, the terminal 400 further includes:
an execution module, configured to, after a listen before talk failure or after a listen before talk failure and after the duration of the sending resource for carrying the Msg3 is over, perform one of the following operations:
terminating the random access process;
after waiting for random backoff, the random access is resumed.
It should be noted that the terminal embodiment is a terminal corresponding to the random access method applied to the terminal, and all implementation manners of the above embodiments are applicable to the terminal embodiment, and the same technical effects as those of the terminal embodiment can also be achieved.
Fig. 5 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present invention.
The terminal 50 includes but is not limited to: radio unit 510, network module 520, audio output unit 530, input unit 540, sensor 550, display unit 560, user input unit 570, interface unit 580, memory 590, processor 511, and power supply 512. Those skilled in the art will appreciate that the terminal configuration shown in fig. 5 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The processor 511 is configured to determine whether transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition; if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk, determining that the random access contention resolution fails;
wherein the preset conditions are as follows: the last Msg3 transmission.
The terminal of the embodiment of the invention determines that the random access contention resolution is unsuccessful when the Msg3 transmission corresponding to the current scheduling is the last Msg3 transmission and the terminal fails to listen before talk, so that the random access contention resolution timer is not required to be started, and the time delay of the random access process is reduced.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 510 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, after receiving downlink data from a network side device, the downlink data is processed by the processor 511; in addition, the uplink data is sent to the network side equipment. In general, radio unit 510 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio unit 510 may also communicate with a network and other devices through a wireless communication system.
The terminal provides the user with wireless broadband internet access through the network module 520, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.
The audio output unit 530 may convert audio data received by the radio frequency unit 510 or the network module 520 or stored in the memory 590 into an audio signal and output as sound. Also, the audio output unit 530 may also provide audio output related to a specific function performed by the terminal 50 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 530 includes a speaker, a buzzer, a receiver, and the like.
The input unit 540 is used to receive an audio or video signal. The input Unit 540 may include a Graphics Processing Unit (GPU) 541 and a microphone 542, and the Graphics processor 541 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 560. The image frames processed by the graphic processor 541 may be stored in the memory 590 (or other storage medium) or transmitted via the radio frequency unit 510 or the network module 520. The microphone 542 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication network side device via the radio frequency unit 510 in case of the phone call mode.
The terminal 50 also includes at least one sensor 550, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 561 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 561 and/or the backlight when the terminal 50 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensor 550 may further include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described herein.
The display unit 560 is used to display information input by a user or information provided to the user. The Display unit 560 may include a Display panel 561, which may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 570 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 570 includes a touch panel 571 and other input devices 572. The touch panel 571, also referred to as a touch screen, can collect touch operations by a user (e.g., operations by a user on the touch panel 571 or near the touch panel 571 using a finger, a stylus, or any suitable object or attachment). The touch panel 571 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 511, and receives and executes commands sent from the processor 511. In addition, the touch panel 571 can be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 570 may include other input devices 572 in addition to the touch panel 571. Specifically, the other input devices 572 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.
Further, a touch panel 571 can be overlaid on the display panel 561, and when the touch panel 571 detects a touch operation on or near the touch panel 571, the touch panel is transmitted to the processor 511 to determine the type of the touch event, and then the processor 511 provides a corresponding visual output on the display panel 561 according to the type of the touch event. Although the touch panel 571 and the display panel 561 are shown in fig. 5 as two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 571 and the display panel 561 may be integrated to implement the input and output functions of the terminal, and the implementation is not limited herein.
The interface unit 580 is an interface for connecting an external device to the terminal 50. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 580 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 50 or may be used to transmit data between the terminal 50 and an external device.
The memory 590 may be used to store software programs as well as various data. The memory 590 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 590 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 511 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 590 and calling data stored in the memory 590, thereby integrally monitoring the terminal. Processor 511 may include one or more processing units; preferably, the processor 511 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 511.
The terminal 50 may further include a power source 512 (e.g., a battery) for supplying power to various components, and preferably, the power source 512 may be logically connected to the processor 511 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
In addition, the terminal 50 includes some functional modules that are not shown, and will not be described in detail herein.
Preferably, an embodiment of the present invention further provides a terminal, including a processor 511, a memory 590, and a computer program stored in the memory 590 and operable on the processor 511, where the computer program is executed by the processor 511 to implement each process of the embodiment of the random access method applied to the terminal side, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here.
The 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 embodiment of the random access method applied to the terminal side, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As shown in fig. 6, an embodiment of the present invention further provides a network-side device 600, which includes:
a sending module 601, configured to send a first message to a terminal;
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: the last Msg3 transmission.
Optionally, the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
Specifically, the configuration message is a broadcast message or a dedicated radio resource control RRC message.
Optionally, the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used to indicate whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule.
Optionally, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
An embodiment of the present invention further provides a network side device, including: the random access method applied to the network side device may further include a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the computer program is executed by the processor to implement the processes in the above-described embodiment of the random access method applied to the network side device, and may achieve the same technical effects, and in order to avoid repetition, the description of the processes is omitted here.
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 in the random access method embodiment applied to the network-side device, 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.
Fig. 7 is a structural diagram of a network side device according to an embodiment of the present invention, which can implement details of the random access method and achieve the same effect. As shown in fig. 7, the network side device 700 includes: a processor 701, a transceiver 702, a memory 703 and a bus interface, wherein:
the processor 701 is configured to read the program in the memory 703 and execute the following processes:
sending a first message to the terminal through the transceiver 702;
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: the last Msg3 transmission.
In FIG. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits representing one or more processors, in particular processor 701, and memory, in particular 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 plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
Optionally, the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
Specifically, the configuration message is a broadcast message or a dedicated radio resource control RRC message.
Optionally, the first message is a random access message two Msg2, where the message two includes first indication information, and the first indication information is used to indicate whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule.
Optionally, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
The network side device may be a Base Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), may be a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), may be an evolved Node B (eNB or eNodeB) in LTE, or may be a relay Station or Access point, or a Base Station in a future 5G network, and the like, which are not limited herein.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (17)
1. A random access method applied to a terminal is characterized by comprising the following steps:
judging whether the transmission of the message three Msg3 corresponding to the current scheduling meets a preset condition or not;
if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk, determining that the random access contention resolution is unsuccessful;
wherein the preset conditions are as follows: a last Msg3 transmission;
when the transmission times corresponding to the current scheduling is not the last transmission, the terminal listens before talking and starts a contention resolution timer, and under the condition that the listen before talking is successful, the Msg3 is transmitted;
judging whether the transmission of the message three Msg3 currently competing for random access meets the preset conditions, including:
receiving a first message sent by network side equipment;
judging whether the Msg3 transmission corresponding to the current scheduling meets a preset condition or not according to the first message;
the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used for indicating whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule; or, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
2. The random access method according to claim 1, wherein the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
3. The random access method according to claim 2, wherein the configuration message is a broadcast message or a dedicated Radio Resource Control (RRC) message.
4. The random access method of claim 1, further comprising:
after a listen before talk failure or after a listen before talk failure and the duration of the sending resource for carrying Msg3 is over, the terminal performs one of the following operations:
terminating the random access process;
after waiting for random backoff, the random access is resumed.
5. A random access method is applied to network side equipment, and is characterized by comprising the following steps:
sending a first message to a terminal;
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: a last Msg3 transmission;
when the transmission times corresponding to the current scheduling is not the last transmission, the first message is used for enabling the terminal to listen before talk and start a contention resolution timer, and the Msg3 is transmitted under the condition that the listen before talk is successful;
the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used for indicating whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule; or, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
6. The random access method according to claim 5, wherein the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
7. The random access method according to claim 6, wherein the configuration message is a broadcast message or a dedicated Radio Resource Control (RRC) message.
8. A terminal, comprising:
the judging module is used for judging whether the transmission of the message three Msg3 corresponding to the current scheduling meets the preset condition;
the determining module is used for determining that the random access contention resolution is unsuccessful if the Msg3 transmission meets the preset condition and the terminal fails to listen before talk;
wherein the preset conditions are as follows: a last Msg3 transmission;
when the transmission times corresponding to the current scheduling is not the last transmission, the terminal listens before talking and starts a contention resolution timer, and under the condition that the listen before talking is successful, the Msg3 is transmitted;
the judging module comprises:
the receiving unit is used for receiving a first message sent by the network side equipment;
the judging unit is used for judging whether the Msg3 transmission corresponding to the current scheduling meets a preset condition or not according to the first message;
the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used for indicating whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule; or, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
9. The terminal of claim 8, wherein the first message is a configuration message, and wherein the configuration message comprises: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
10. The terminal of claim 9, wherein the configuration message is a broadcast message or a dedicated Radio Resource Control (RRC) message.
11. The terminal of claim 8, further comprising:
an execution module, configured to, after a listen before talk failure or after a listen before talk failure and after the duration of the sending resource for carrying the Msg3 is over, perform one of the following operations:
terminating the random access process;
after waiting for random backoff, the random access is resumed.
12. A terminal, 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 random access method according to any one of claims 1 to 4.
13. A network-side device, comprising:
the sending module is used for sending a first message to the terminal;
the first message is used for the terminal to judge whether the transmission of a message three Msg3 corresponding to the current scheduling meets a preset condition, wherein the preset condition is as follows: a last Msg3 transmission;
when the transmission times corresponding to the current scheduling is not the last transmission, the first message is used for enabling the terminal to listen before talk and start a contention resolution timer, and the Msg3 is transmitted under the condition that the listen before talk is successful;
the first message is a random access message two Msg2, the Msg2 includes first indication information, and the first indication information is used for indicating whether the initial transmission schedule of the current Msg3 is the last Msg3 schedule; or, the first message is a scheduling message, and the scheduling message is used to indicate whether the current retransmission scheduling is the last retransmission scheduling.
14. The network-side device of claim 13, wherein the first message is a configuration message, and the configuration message includes: the maximum number of transmissions for random access Msg3 or the maximum number of retransmissions for random access Msg 3.
15. The network-side device of claim 14, wherein the configuration message is a broadcast message or a dedicated Radio Resource Control (RRC) message.
16. A network-side device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, performs the steps of the random access method according to any of claims 5 to 7.
17. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the steps of the random access method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910726739.3A CN111836397B (en) | 2019-08-07 | 2019-08-07 | Random access method, terminal and network side equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910726739.3A CN111836397B (en) | 2019-08-07 | 2019-08-07 | Random access method, terminal and network side equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111836397A CN111836397A (en) | 2020-10-27 |
| CN111836397B true CN111836397B (en) | 2022-09-27 |
Family
ID=72912700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910726739.3A Active CN111836397B (en) | 2019-08-07 | 2019-08-07 | Random access method, terminal and network side equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111836397B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112689247B (en) * | 2020-12-22 | 2023-03-14 | 深圳安信卓科技有限公司 | Terminal access method and device in cluster system and computer storage medium |
| CN115209561A (en) | 2021-04-01 | 2022-10-18 | 华硕电脑股份有限公司 | Method and apparatus for handling contention resolution in a wireless communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018174656A1 (en) * | 2017-03-24 | 2018-09-27 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving uplink data |
| WO2018217021A1 (en) * | 2017-05-26 | 2018-11-29 | Lg Electronics Inc. | Method and user equipment for performing random access procedure |
| CN109392107A (en) * | 2017-08-08 | 2019-02-26 | 华为技术有限公司 | A kind of method and apparatus of communication |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108476532A (en) * | 2016-02-02 | 2018-08-31 | 英特尔Ip公司 | Listem-before-talk (LBT) failure during random access procedure |
| CN107466113B (en) * | 2016-06-03 | 2020-04-21 | 北京佰才邦技术有限公司 | Msg3 transmission method, device and related equipment |
-
2019
- 2019-08-07 CN CN201910726739.3A patent/CN111836397B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018174656A1 (en) * | 2017-03-24 | 2018-09-27 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving uplink data |
| WO2018217021A1 (en) * | 2017-05-26 | 2018-11-29 | Lg Electronics Inc. | Method and user equipment for performing random access procedure |
| CN109392107A (en) * | 2017-08-08 | 2019-02-26 | 华为技术有限公司 | A kind of method and apparatus of communication |
Non-Patent Citations (1)
| Title |
|---|
| LTE-U系统的随机接入和数据传输的机制设计与参数优化;袁建涛;《信息科技辑》;20190615;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111836397A (en) | 2020-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110769505B (en) | Random access method, terminal and network equipment | |
| EP3700281B1 (en) | Random access method and device, and terminal | |
| CN110035556B (en) | Method and terminal for processing conflict of communication service process | |
| US20210153259A1 (en) | Random access method and related device | |
| CN111278153B (en) | Random access method and device, and communication equipment | |
| CN111835458B (en) | Information transmission and receiving method, terminal and network side equipment | |
| CN110913499A (en) | Random access method and terminal | |
| CN112566273A (en) | Data receiving and sending method, terminal and network side equipment | |
| US20230300897A1 (en) | Random access method, terminal, and network device | |
| JP7210755B2 (en) | Random access method and equipment | |
| CN111836397B (en) | Random access method, terminal and network side equipment | |
| CN110769517B (en) | Random access method and related equipment | |
| CN113498200A (en) | Transmission configuration method and terminal | |
| CN110719647B (en) | Random access method, terminal and network equipment | |
| CN111263462B (en) | Random access method and device | |
| CN112654093A (en) | Information transmission and receiving method, terminal and network side equipment | |
| CN111615204A (en) | Method and terminal for processing random access message | |
| WO2022199095A1 (en) | Data transmission method and apparatus, storage medium, and wireless node | |
| CN113133126B (en) | Method, terminal and network equipment for converting working frequency points | |
| CN111278032B (en) | PUCCH (physical uplink control channel) sending method, receiving method, terminal and network side equipment | |
| US12004230B2 (en) | Random access method and related device | |
| CN112770406B (en) | Listen-before-talk (LBT) failure recovery method, user equipment and base station | |
| CN111757530B (en) | Random access method and communication equipment | |
| CN112584536B (en) | Uplink transmission method, resource allocation method, terminal and network side equipment | |
| CN110831224B (en) | Random access method and terminal equipment |
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 |