CN110381603B - Random access method and terminal - Google Patents
Random access method and terminal Download PDFInfo
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- CN110381603B CN110381603B CN201810329807.8A CN201810329807A CN110381603B CN 110381603 B CN110381603 B CN 110381603B CN 201810329807 A CN201810329807 A CN 201810329807A CN 110381603 B CN110381603 B CN 110381603B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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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 invention provides a random access method and a terminal, wherein the method comprises the following steps: acquiring the beam quality of an available beam for transmitting a target signal; wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB; determining the access sequence of the available beams according to the beam quality of the available beams; and according to the access sequence, sequentially passing through the random access resources corresponding to the available wave beams to access the target cell. When the terminal detects the available wave beams for transmitting the CSI-RS and the SSB, the access sequence of the special random access resource based on the SSB and the special random access resource based on the CSI-RS is determined according to the wave beam quality of the available wave beams, so that the terminal reasonably utilizes the two special random access resources to access the target cell.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a random access method and a terminal.
Background
In a fifth Generation (5Generation, 5G) mobile communication system, a handover procedure based on a Long Term Evolution (LTE) system mainly includes: measurement configuration, measurement report, switching request, switching confirmation, random access initiated by the terminal in the target cell and the like. But because the multi-beam operation is introduced in the 5G system, the information related to the beam is added in the switching process. Based on the Information related to the beams, the handover command may carry dedicated random access resources reserved by the target cell for the terminal, and an association relationship between the dedicated random access resources and a Synchronization Signal Block (SSB) and a Channel State indication Reference Signal (CSI-RS).
Due to the rapid change of the wireless channel, although the terminal detects the available beam in the neighbor cell measurement, when the terminal communicates in the target cell, the measured available beam may become unavailable, so the handover command also carries a quality threshold of the available beam of the target cell, and the beam exceeding the threshold is considered to be available, and the terminal can use the corresponding dedicated random access resource. The network device may configure respective corresponding threshold values for the SSB and the CSI-RS.
When the terminal initiates random access in the target cell, the dedicated random access resource is preferentially used, and the common random access resource is used again when the available dedicated random access resource does not exist. Since the network device may reserve the dedicated random access resource based on the SSB and the dedicated random access resource based on the CSI-RS for the terminal at the same time, the terminal cannot determine how to use the two dedicated random access resources, which may cause a random access failure of the terminal in the target cell.
Disclosure of Invention
The invention provides a random access method and a terminal, which solve the problem that the random access of the terminal in a target cell fails because the terminal cannot determine how to use two special random access resources based on an SSB (secure State message) and a CSI-RS (channel State information-reference Signal).
The embodiment of the invention provides a random access method, which is applied to a terminal and comprises the following steps:
acquiring the beam quality of an available beam for transmitting a target signal; wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB;
determining the access sequence of the available beams according to the beam quality of the available beams;
and according to the access sequence, sequentially passing through the random access resources corresponding to the available wave beams to access the target cell.
Wherein, the step of determining the access sequence of the available beams according to the beam quality of the available beams comprises:
and determining the access sequence of the available beams from high to low according to the beam quality of the available beams for transmitting the CSI-RS and the SSB.
Wherein, the step of determining the access sequence of the available beams according to the beam quality of the available beams comprises:
determining a first access order of first beams for transmitting CSI-RS according to the beam quality of the first beams among available beams;
and/or the presence of a gas in the gas,
a second access order for a second beam of the available beams is determined according to a beam quality of the second beam for transmitting the SSB.
After the step of determining the first access order of the first beam according to the beam quality of the first beam for transmitting the CSI-RS among the available beams, the method further includes:
in the second beam, acquiring a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission CSI-RS;
and updating the first access sequence according to the beam quality after the first target beam is deflected.
The method comprises the following steps of sequentially accessing random access resources corresponding to available beams according to an access sequence to access a target cell, wherein the steps comprise:
when the data transmission rate requirement is higher than the coverage requirement, accessing the target cell through a first random access resource corresponding to the first beam according to a first access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through a second random access resource corresponding to the second wave beam according to a second access sequence.
After the step of determining a second access order of the second beam according to the beam quality of the second beam transmitting the SSB among the available beams, the method further includes:
in the first beam, acquiring a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission SSB;
and updating the second access sequence according to the beam quality after the second target beam is deflected.
The method comprises the following steps of sequentially accessing random access resources corresponding to available beams according to an access sequence to access a target cell, wherein the steps comprise:
when the coverage requirement is higher than the data transmission rate requirement, accessing the target cell through a second random access resource corresponding to the second beam according to a second access sequence;
and if the access of the target cell fails, continuing to access the target cell through the first random access resource corresponding to the first wave beam according to the first access sequence.
Wherein the preset offset value is obtained from a cell handover command sent by the target cell or from a broadcasted system message.
When an available beam for transmitting a reference signal corresponds to at least two random access resources, performing access to a target cell through the random access resources corresponding to the available beam, including:
according to the beam quality of the downlink beams corresponding to the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
according to the time sequence of detecting at least two random access resources, sequentially passing through the at least two random access resources to access the target cell;
alternatively, the first and second electrodes may be,
and according to the random sequence, sequentially passing through at least two random access resources to access the target cell.
Before the step of performing access to the target cell, sequentially passing through the random access resources corresponding to the available beams according to the access sequence, the method further includes:
and acquiring the random access resource corresponding to the available wave beam.
The step of acquiring the random access resource corresponding to the available beam comprises the following steps:
and acquiring the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
A terminal, comprising: a processor; a memory coupled to the processor, and a transceiver coupled to the processor; the processor is used for calling and executing the programs and data stored in the memory, and the following steps are realized:
acquiring the beam quality of an available beam for transmitting a target signal; wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB;
determining the access sequence of the available beams according to the beam quality of the available beams;
and the transceiver is used for sequentially passing through the random access resources corresponding to the available wave beams according to the access sequence to access the target cell.
Wherein the processor is configured to:
and determining the access sequence of the available beams from high to low according to the beam quality of the available beams for transmitting the CSI-RS and the SSB.
Wherein the processor is configured to:
determining a first access order of first beams for transmitting CSI-RS according to the beam quality of the first beams among available beams;
and/or the presence of a gas in the gas,
a second access order for a second beam of the available beams is determined according to a beam quality of the second beam for transmitting the SSB.
Wherein the processor is configured to:
in the second beam, acquiring a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission CSI-RS;
and updating the first access sequence according to the beam quality after the first target beam is deflected.
Wherein the transceiver is configured to:
when the data transmission rate requirement is higher than the coverage requirement, accessing the target cell through a first random access resource corresponding to the first beam according to a first access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through a second random access resource corresponding to the second wave beam according to a second access sequence.
Wherein the processor is configured to:
in the first beam, acquiring a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission SSB;
and updating the second access sequence according to the beam quality after the second target beam is deflected.
Wherein the transceiver is configured to:
when the coverage requirement is higher than the data transmission rate requirement, accessing the target cell through a second random access resource corresponding to the second beam according to a second access sequence;
and if the access of the target cell fails, continuing to access the target cell through the first random access resource corresponding to the first wave beam according to the first access sequence.
Wherein the preset offset value is obtained from a cell handover command sent by the target cell or from a broadcasted system message.
Wherein, when the available beam for transmitting a reference signal corresponds to at least two random access resources, the transceiver is configured to:
according to the beam quality of the downlink beams corresponding to the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
according to the time sequence of detecting at least two random access resources, sequentially passing through the at least two random access resources to access the target cell;
alternatively, the first and second electrodes may be,
and according to the random sequence, sequentially passing through at least two random access resources to access the target cell.
Wherein the processor is configured to: and acquiring the random access resource corresponding to the available wave beam.
Wherein the processor is configured to: and acquiring the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the random access method described above.
The technical scheme of the invention has the beneficial effects that: when the terminal detects the available wave beams for transmitting the CSI-RS and the SSB, the access sequence of the special random access resource based on the SSB and the special random access resource based on the CSI-RS is determined according to the wave beam quality of the available wave beams, so that the terminal reasonably utilizes the two special random access resources to access the target cell, and the problem of cell access failure caused by improper resource use is avoided.
Drawings
Fig. 1 is a flow chart of a random access method according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a terminal according to an embodiment of the present invention;
fig. 3 shows a block diagram of the terminal of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In addition, the terms "system" and "network" are often used interchangeably herein.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
As shown in fig. 1, an embodiment of the present invention provides a random access method, which specifically includes the following steps:
step 11: the beam quality of an available beam transmitting a target signal is acquired.
Wherein the target signal comprises: the channel state indicates the reference signal CSI-RS and the synchronization signal block SSB. The network device may configure a beam availability threshold for the SSB and the CSI-RS, that is, the terminal may determine that the beam is available only when the beam quality exceeds the beam availability threshold. Specifically, the terminal acquires the beam quality of an available beam transmitting the SSB, and the beam quality of an available beam transmitting the CSI-RS.
Step 12: and determining the access sequence of the available beams according to the beam quality of the available beams.
In order to avoid the problem that the available beams are changed into unavailable beams due to rapid change of the wireless channel, the terminal can sort the available beams according to the beam quality of the currently detected available beams, so as to determine the access sequence and ensure that the available beams with good beam quality are preferentially used.
Step 13: and according to the access sequence, sequentially passing through the random access resources corresponding to the available wave beams to access the target cell.
Because the access sequence is determined according to the beam quality of the available beams, the terminal can be ensured to access the target cell by adopting the random access resources corresponding to the available beams with good beam quality to the maximum extent.
Specifically, when the available beam for transmitting a reference signal (SSB or CSI-RS) corresponds to at least two random access resources, that is, if the target cell reserves multiple random access resources associated with an available beam for the terminal, in step 13, the step of accessing the target cell via the random access resource corresponding to the available beam includes, but is not limited to, the following forms:
in a first mode, the terminal may use the random access resources according to the quality sequence of the downlink beams corresponding to the random access resources, and specifically, access to the target cell is performed sequentially through at least two random access resources according to the beam quality of the downlink beams corresponding to at least two random access resources.
And secondly, accessing the target cell sequentially through the at least two random access resources according to the time sequence of detecting the at least two random access resources. Specifically, the terminal uses the time sequence of detecting the downlink beams corresponding to the random access resources as the time sequence of detecting at least two random access resources, and uses the random access resources corresponding to the downlink beams according to the time sequence.
The third way, how the terminal uses the at least two random access resources to be handed over to the terminal, for example: and according to a random sequence, sequentially passing through at least two random access resources to access the target cell, namely the terminal can randomly use the at least two random access resources corresponding to the available beam.
Further, before step 13, the following steps may be further included: and acquiring the random access resource corresponding to the available wave beam. The specific steps may be: and acquiring the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
In a preferred embodiment, step 12 includes, but is not limited to, the following:
firstly, according to the beam quality of the available beams for transmitting the CSI-RS and the SSB, determining the access sequence of the available beams from high to low.
The method is that the terminal sorts according to the beam quality of the detected available beams, and preferentially uses the random access resources corresponding to the available beams with good quality, and the method does not distinguish CSI-RS and SSB and only sorts according to the quality of wave numbers.
Determining a first access sequence of a first beam according to the beam quality of the first beam for transmitting the CSI-RS in the available beams; and/or determining a second access order of second beams according to the beam quality of the second beams transmitting the SSBs among the available beams.
In this way, for a first beam of the available beams for transmitting the SSB and a second beam of the available beams for transmitting the CSI-RS, the terminal determines a first access order for the first beam for transmitting the SSB and a second access order for the second beam for transmitting the CSI-RS according to the quality ranking of the detected beams, respectively. That is, the method is a sort-first and sort-later method, and as with the first method, the method preferentially uses the random access resource corresponding to the available beam with good quality.
Because the requirements of the terminal on the network performance are different in different service scenarios, the following description of the embodiment of the present invention is provided in combination with specific application scenarios:
when the data transmission rate requirement is higher than the coverage requirement, namely the terminal is more sensitive to the data transmission rate, the terminal accesses the target cell through a first random access resource corresponding to a first beam according to a first access sequence; and if the target cell fails to be accessed, continuing to access the target cell through a second random access resource corresponding to the second wave beam according to a second access sequence.
Specifically, in actual network deployment, since beams based on the CSI-RS mainly provide accurate data communication for the terminal, the terminal more sensitive to the data rate preferentially uses the dedicated random access resource associated with the CSI-RS; no matter how different the quality of the beam on which the SSB is located and the beam on which the CSI-RS is located.
Further, if the target cell reserves at least two random access resources associated with the CSI-RS for the terminal, the terminal may sequentially perform access to the target cell through the at least two random access resources according to the beam quality of the downlink beam corresponding to the at least two random access resources; or, the terminal may also perform access to the target cell sequentially through the at least two random access resources according to the time sequence of detecting the at least two random access resources; or how the terminal uses the at least two random access resources to give the terminal implementation, for example: and according to the random sequence, sequentially passing through at least two random access resources to access the target cell.
Preferably, if the terminal does not successfully use the random access resource corresponding to the CSI-RS, the terminal uses the random access resource associated with the SSB in a similar manner to the method for using the random access resource corresponding to the CSI-RS by the terminal; however, the specific usage order may be the same as or different from the usage order of the random access resources corresponding to the CSI-RS.
In another preferred embodiment, after determining the first access order of the first beam according to the beam quality of the first beam for transmitting the CSI-RS among the available beams, the method may further include: in the second beam, acquiring a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission CSI-RS; and updating the first access sequence according to the beam quality after the first target beam is deflected.
When the data transmission rate requirement is higher than the coverage requirement, namely the terminal is more sensitive to the data transmission rate, the terminal accesses the target cell through the first random access resource corresponding to the first beam according to the updated first access sequence; and if the target cell fails to be accessed, continuing to access the target cell through a second random access resource corresponding to the second beam according to a second access sequence after the first target beam is removed.
In this embodiment, the terminal preferentially uses the random access resource corresponding to the CSI-RS, but when the terminal detects that the beam quality of the second beam for transmitting the SSB exceeds the threshold value available for the beam corresponding to the CSI-RS by a preset offset value (delta) (the detla value may be obtained from a cell handover command sent by a target cell or obtained from a broadcasted system message), the random access resource corresponding to the SSB may also be preferentially used without waiting until the terminal has tried all the random access resources corresponding to the CSI-RS. As for the use method of the random access resource corresponding to the CSI-RS and the SSB preferentially used, one of the above-described manners in which the UE uses the random access resource may be adopted.
Wherein, according to the beam quality after the first target beam is shifted, updating the first access sequence can be realized as follows: and updating the first access sequence according to the beam quality after the first target beam is shifted and the beam quality of the first beam from high to low.
Therefore, for a terminal with a data transmission rate higher than a coverage requirement, the random access resource corresponding to the CSI-RS is preferentially used, and when the quality of the random access resource corresponding to the SSB is far higher than that of the random access resource corresponding to the CSI-RS, the random access resource corresponding to the SSB can be preferentially used, so that the data transmission rate can be ensured, and the reliability of data transmission can be ensured.
When the coverage requirement is higher than the data transmission rate requirement, namely the terminal is more sensitive to the coverage, the terminal can access the target cell through a second random access resource corresponding to a second beam according to a second access sequence; and if the access of the target cell fails, continuing to access the target cell through the first random access resource corresponding to the first wave beam according to the first access sequence.
Specifically, for a terminal which is more sensitive to coverage, dedicated random access resources corresponding to the SSBs are preferentially used, and when all available random access resources corresponding to the SSBs are unsuccessful, dedicated random access resources corresponding to the CSI-RS are used again.
Particularly, if the target cell reserves at least two random access resources associated with the SSB for the terminal, the terminal may sequentially access the target cell through the at least two random access resources according to the beam quality of the downlink beam corresponding to the at least two random access resources; or, the terminal may also perform access to the target cell sequentially through the at least two random access resources according to the time sequence of detecting the at least two random access resources; or how the terminal uses the at least two random access resources to give the terminal implementation, for example: and according to the random sequence, sequentially passing through at least two random access resources to access the target cell.
Preferably, the method for the terminal to use the random access resource associated with the CSI-RS is similar to the method for the terminal to use the random access resource corresponding to the SSB; however, the specific usage order may be the same as or different from the usage order of the random access resources corresponding to the SSB.
In another preferred embodiment, after determining the second access order of the second beam according to the beam quality of the second beam transmitting the SSB among the available beams, the method further comprises: in the first beam, acquiring a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission SSB; and updating the second access sequence according to the beam quality after the second target beam is deflected.
When the coverage requirement is higher than the data transmission rate requirement, that is, the terminal is more sensitive to the coverage, the terminal may perform access to the target cell through a second random access resource corresponding to the second beam according to the updated second access sequence; and if the access of the target cell fails, continuing to access the target cell through the first random access resource corresponding to the first beam according to the first access sequence after the second target beam is removed.
In this embodiment, the terminal preferentially uses the dedicated random access resource corresponding to the SSB, but when the terminal detects that the beam quality of the first beam for transmitting the CSI-RS exceeds the threshold value available for the beam corresponding to the SSB by a preset offset value (delta) (the detla value is obtained from a cell handover command sent by a target cell or obtained from a broadcasted system message), the random access resource corresponding to the CSI-RS may also be preferentially used without waiting for the terminal to try all the random access resources corresponding to the SSB. As for the method of using the random access resource corresponding to the SSB and the CSI-RS that is preferentially used, one of the above-described manners of using the random access resource by the UE may be adopted.
Wherein, according to the beam quality after the second target beam offset, updating the second access sequence can be realized as follows: and updating the second access sequence according to the beam quality after the second target beam is deflected and the beam quality of the second beam from high to low.
Therefore, for a terminal with a coverage requirement higher than a data transmission rate requirement, the random access resource corresponding to the SSB is preferentially used, and when the quality of the random access resource corresponding to the CSI-RS is far higher than that of the random access resource corresponding to the SSB, the random access resource corresponding to the CSI-RS can be preferentially used, so that the coverage performance of the terminal can be ensured, and the reliability of data transmission can be ensured.
In the random access method of the embodiment of the invention, when the terminal detects the available wave beams for transmitting the CSI-RS and the SSB, the access sequence of the special random access resource based on the SSB and the special random access resource based on the CSI-RS is determined according to the wave beam quality of the available wave beams, so that the terminal reasonably utilizes the two special random access resources to access the target cell, and the problem of cell access failure caused by improper resource use is avoided.
The foregoing embodiments are respectively introduced to the random access method of the present invention, and the following embodiments will further describe a corresponding terminal with reference to the accompanying drawings.
Specifically, as shown in fig. 2, the terminal according to the embodiment of the present invention includes:
a first obtaining module 210, configured to obtain a beam quality of an available beam for transmitting a target signal; wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB;
a determining module 220, configured to determine an access order of the available beams according to the beam quality of the available beams;
the access module 230 is configured to perform access to the target cell sequentially through the random access resources corresponding to the available beams according to the access sequence.
Wherein, the determining module 220 comprises:
and the first determining submodule is used for determining the access sequence of the available beams from high to low according to the beam quality of the available beams for transmitting the CSI-RS and the SSB.
Wherein, the determining module 220 further comprises:
a second determining submodule, configured to determine a first access order of a first beam for transmitting the CSI-RS among the available beams, according to a beam quality of the first beam;
and/or the presence of a gas in the gas,
and a third determining sub-module, configured to determine a second access order of a second beam of the SSBs according to a beam quality of the second beam among the available beams.
Wherein, the determining module 220 further comprises:
the first obtaining sub-module is used for obtaining a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission CSI-RS in the second beam;
and the first updating submodule is used for updating the first access sequence according to the beam quality after the first target beam is deflected.
Wherein, the access module 230 includes:
the first access sub-module is used for accessing the target cell through a first random access resource corresponding to the first beam according to a first access sequence when the data transmission rate requirement is higher than the coverage requirement;
and the second access sub-module is used for continuing to access the target cell through a second random access resource corresponding to the second beam according to a second access sequence if the access of the target cell fails.
Wherein, the determining module 220 further comprises:
the second obtaining sub-module is used for obtaining a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission SSB in the first beam;
and the second updating submodule is used for updating the second access sequence according to the beam quality after the second target beam is deflected.
Wherein, the access module 230 further includes:
the third access submodule is used for accessing the target cell through a second random access resource corresponding to the second wave beam according to a second access sequence when the coverage requirement is higher than the data transmission rate requirement;
and the fourth access sub-module is used for continuing to access the target cell through the first random access resource corresponding to the first beam according to the first access sequence if the access of the target cell fails.
Wherein the preset offset value is obtained from a cell handover command sent by the target cell or from a broadcasted system message.
When the available beam for transmitting a reference signal corresponds to at least two random access resources, the access module 230 further includes:
the fifth access sub-module is used for performing access of the target cell sequentially through the at least two random access resources according to the beam quality of the downlink beam corresponding to the at least two random access resources;
alternatively, the first and second electrodes may be,
the sixth access submodule is used for performing access of the target cell sequentially through the at least two random access resources according to the time sequence of detecting the at least two random access resources;
alternatively, the first and second electrodes may be,
and the seventh access submodule is used for performing access of the target cell sequentially through at least two random access resources according to the random sequence.
Wherein, the terminal 200 further includes:
and the second acquisition module is used for acquiring the random access resource corresponding to the available beam.
Wherein, the second acquisition module includes:
and the third obtaining submodule is used for obtaining the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
The terminal embodiment of the invention is corresponding to the embodiment of the method, all implementation means in the method embodiment are applicable to the embodiment of the terminal, and the same technical effect can be achieved. When the terminal detects available wave beams for transmitting the CSI-RS and the SSB, the access sequence of the special random access resource based on the SSB and the special random access resource based on the CSI-RS is determined according to the wave beam quality of the available wave beams, so that the terminal reasonably utilizes the two special random access resources to access a target cell, and the problem of cell access failure caused by improper resource use is avoided.
As shown in fig. 3, the present embodiment provides a terminal, including:
a processor 31; and a memory 33 connected to the processor 31 through a bus interface 32, wherein the memory 33 is used for storing programs and data used by the processor 31 in executing operations, and when the processor 31 calls and executes the programs and data stored in the memory 33, the following processes are performed.
Wherein a transceiver 34 is connected to the bus interface 32 for receiving and transmitting data under control of the processor 31.
The processor 31 is configured to obtain a beam quality of an available beam for transmitting a target signal; wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB;
determining the access sequence of the available beams according to the beam quality of the available beams;
and the transceiver 34 is configured to access the target cell sequentially through the random access resources corresponding to the available beams according to the access sequence.
Wherein the processor 31 is configured to:
and determining the access sequence of the available beams from high to low according to the beam quality of the available beams for transmitting the CSI-RS and the SSB.
Wherein the processor 31 is configured to:
determining a first access order of first beams for transmitting CSI-RS according to the beam quality of the first beams among available beams;
and/or the presence of a gas in the gas,
a second access order for a second beam of the available beams is determined according to a beam quality of the second beam for transmitting the SSB.
Wherein the processor 31 is configured to:
in the second beam, acquiring a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission CSI-RS;
and updating the first access sequence according to the beam quality after the first target beam is deflected.
Wherein the transceiver 34 is configured to:
when the data transmission rate requirement is higher than the coverage requirement, accessing the target cell through a first random access resource corresponding to the first beam according to a first access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through a second random access resource corresponding to the second wave beam according to a second access sequence.
Wherein the processor 31 is configured to:
in the first beam, acquiring a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the transmission SSB;
and updating the second access sequence according to the beam quality after the second target beam is deflected.
Wherein the transceiver 34 is configured to:
when the coverage requirement is higher than the data transmission rate requirement, accessing the target cell through a second random access resource corresponding to the second beam according to a second access sequence;
and if the access of the target cell fails, continuing to access the target cell through the first random access resource corresponding to the first wave beam according to the first access sequence.
Wherein the preset offset value is obtained from a cell handover command sent by the target cell or from a broadcasted system message.
Wherein, when the available beam for transmitting a reference signal corresponds to at least two random access resources, the transceiver 34 is configured to:
according to the beam quality of the downlink beams corresponding to the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
according to the time sequence of detecting at least two random access resources, sequentially passing through the at least two random access resources to access the target cell;
alternatively, the first and second electrodes may be,
and according to the random sequence, sequentially passing through at least two random access resources to access the target cell.
Wherein the processor 31 is configured to: and acquiring the random access resource corresponding to the available wave beam.
Wherein the processor 31 is configured to: and acquiring the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
It should be noted that in fig. 3, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 31 and various circuits of memory represented by memory 33 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 34 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 35 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 31 is responsible for managing the bus architecture and general processing, and the memory 33 may store data used by the processor 31 in performing operations.
Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.
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 foregoing embodiment of the random access method, 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.
Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, 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 appended claims.
Claims (21)
1. A random access method applied to a terminal is characterized by comprising the following steps:
acquiring beam quality of an available beam transmitting a target signal, wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB;
determining an access order of the available beams according to the beam quality of the available beams, comprising: determining a first access order of first beams of the available beams for transmitting the CSI-RS according to the beam quality of the first beams, and/or determining a second access order of second beams of the available beams for transmitting the SSB according to the beam quality of the second beams;
and according to the access sequence, sequentially passing through the random access resources corresponding to the available wave beams to access the target cell.
2. The random access method of claim 1, wherein the step of determining the access order of the available beams according to the beam quality of the available beams comprises:
and determining the access sequence of the available beams from high to low according to the beam quality of the available beams for transmitting the CSI-RS and the SSB.
3. The random access method of claim 1, wherein after the step of determining a first access order for a first beam of the available beams for transmitting the CSI-RS according to a beam quality of the first beam, further comprising:
acquiring a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the CSI-RS in the second beam;
and updating the first access sequence according to the beam quality after the first target beam is deflected.
4. The random access method according to claim 1 or 3, wherein the step of performing access to the target cell sequentially through the random access resources corresponding to the available beams according to the access order comprises:
when the data transmission rate requirement is higher than the coverage requirement, accessing the target cell through a first random access resource corresponding to the first beam according to the first access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through the second random access resource corresponding to the second beam according to the second access sequence.
5. The random access method of claim 1, wherein the step of determining a second access order for a second beam of the SSBs according to the beam quality of the second beam among the available beams further comprises:
acquiring a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the SSB in the first beam;
and updating the second access sequence according to the beam quality after the second target beam is deflected.
6. The random access method according to claim 1 or 5, wherein the step of performing access to the target cell sequentially through the random access resources corresponding to the available beams according to the access order comprises:
when the coverage requirement is higher than the data transmission rate requirement, accessing the target cell through a second random access resource corresponding to the second beam according to the second access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through the first random access resource corresponding to the first wave beam according to the first access sequence.
7. A random access method according to claim 3 or 5, wherein the preset offset value is obtained from a cell handover command sent by the target cell or from a broadcasted system message.
8. The random access method of claim 1, wherein when at least two random access resources correspond to an available beam for transmitting a reference signal, the step of performing access to the target cell through the random access resource corresponding to the available beam comprises:
according to the beam quality of the downlink beams corresponding to the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
according to the time sequence of the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
and according to the random sequence, sequentially accessing the target cell through the at least two random access resources.
9. The random access method according to claim 1, wherein before the step of sequentially passing through the random access resources corresponding to the available beams according to the access order to perform access to the target cell, the method further comprises:
and acquiring the random access resource corresponding to the available wave beam.
10. The random access method of claim 9, wherein the step of acquiring the random access resource corresponding to the available beam comprises:
and acquiring the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
11. A terminal, comprising: a processor; the transceiver is connected with the processor, wherein the processor is used for calling and executing the programs and data stored in the memory, and the following steps are realized:
acquiring the beam quality of an available beam for transmitting a target signal; wherein the target signal comprises: a channel state indication reference signal CSI-RS and a synchronization signal block SSB;
determining an access sequence of the available beams according to the beam quality of the available beams;
the transceiver is used for sequentially passing through the random access resources corresponding to the available wave beams according to the access sequence to access the target cell;
the processor is configured to:
determining a first access order of a first beam of the available beams for transmitting the CSI-RS according to the beam quality of the first beam;
and/or the presence of a gas in the gas,
determining a second access order for a second beam of said SSBs according to a beam quality of said second beam of said available beams.
12. The terminal of claim 11, wherein the processor is configured to:
and determining the access sequence of the available beams from high to low according to the beam quality of the available beams for transmitting the CSI-RS and the SSB.
13. The terminal of claim 11, wherein the processor is configured to:
acquiring a first target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the CSI-RS in the second beam;
and updating the first access sequence according to the beam quality after the first target beam is deflected.
14. A terminal according to claim 11 or 13, wherein the transceiver is configured to:
when the data transmission rate requirement is higher than the coverage requirement, accessing the target cell through a first random access resource corresponding to the first beam according to the first access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through the second random access resource corresponding to the second beam according to the second access sequence.
15. The terminal of claim 11, wherein the processor is configured to:
acquiring a second target beam of which the beam quality after being offset according to a preset offset value exceeds a beam available threshold value corresponding to the SSB in the first beam;
and updating the second access sequence according to the beam quality after the second target beam is deflected.
16. A terminal according to claim 11 or 15, wherein the transceiver is configured to:
when the coverage requirement is higher than the data transmission rate requirement, accessing the target cell through a second random access resource corresponding to the second beam according to the second access sequence;
and if the target cell fails to be accessed, continuing to access the target cell through the first random access resource corresponding to the first wave beam according to the first access sequence.
17. A terminal according to claim 13 or 15, wherein the preset offset value is obtained from a cell handover command sent by the target cell or from a broadcasted system message.
18. The terminal of claim 11, wherein when the available beams for transmitting a reference signal correspond to at least two random access resources, the transceiver is configured to:
according to the beam quality of the downlink beams corresponding to the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
according to the time sequence of the at least two random access resources, sequentially accessing the target cell through the at least two random access resources;
alternatively, the first and second electrodes may be,
and according to the random sequence, sequentially accessing the target cell through the at least two random access resources.
19. The terminal of claim 11, wherein the processor is configured to:
and acquiring the random access resource corresponding to the available wave beam.
20. The terminal of claim 19, wherein the processor is configured to:
and acquiring the random access resource corresponding to the available wave beam from the cell switching command sent by the target cell.
21. 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 10.
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| CN114667767A (en) * | 2019-11-30 | 2022-06-24 | 华为技术有限公司 | Method and device for broadcasting synchronous signal/broadcast signal block |
| CN113645685B (en) * | 2020-05-11 | 2022-09-16 | 深圳市万普拉斯科技有限公司 | Initial access method, device, mobile terminal and computer readable storage medium |
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