CN112954777B - Random access method and device - Google Patents
Random access method and device Download PDFInfo
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- CN112954777B CN112954777B CN201911260810.XA CN201911260810A CN112954777B CN 112954777 B CN112954777 B CN 112954777B CN 201911260810 A CN201911260810 A CN 201911260810A CN 112954777 B CN112954777 B CN 112954777B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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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
- H04W74/002—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a random access method and a random access device, and belongs to the technical field of wireless communication. The random access method is applied to the terminal and comprises the following steps: selecting at least one downlink receiving beam for random access according to the uplink beam selection capability of the device; random access is initiated on at least one uplink transmit beam that matches at least one of the downlink receive beams. By the technical scheme, the problems of increased power consumption or random access failure caused by failure of uplink beam transmission can be solved.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a random access method and apparatus.
Background
Currently, two terminal capabilities are defined in the related communication protocol according to the active selection or scanning selection of the uplink transmission beam aiming at the millimeter wave frequency band, wherein the two terminal capabilities are respectively the capability of supporting uplink automatic beam selection (beam correspondence capability) and the capability of supporting beam selection based on uplink beam scanning. The beam selection capability based on uplink beam scanning means that the terminal cannot autonomously determine the optimal uplink transmission beam, but needs to send sounding information on corresponding resources based on sounding reference signal (Sounding Reference Signal, SRS) information configured by the base station, the base station determines the optimal uplink beam of the terminal (UE) after receiving the information, and notifies the UE of the uplink beam finally selected, and the UE selects to send uplink data at the corresponding optimal uplink beam position according to the base station.
Disclosure of Invention
The embodiment of the invention provides a random access method and a device, which can solve the problems of increased power consumption or random access failure caused by uplink beam transmission failure.
The embodiment of the invention provides the following technical scheme:
the embodiment of the invention provides a random access method, which is applied to a terminal and comprises the following steps:
selecting at least one downlink receiving beam for random access according to the uplink beam selection capability of the device;
random access is initiated on at least one uplink transmit beam that matches at least one of the downlink receive beams.
Optionally, the initiating random access on at least one uplink transmission beam matched with at least one downlink reception beam includes:
sequencing at least one downlink receiving beam according to the performance parameters of the reference signals to obtain the serial number of each downlink receiving beam;
generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
Optionally, before the selecting at least one downlink receiving beam for random access according to the uplink beam selection capability of the method, the method further includes:
receiving a Radio Resource Control (RRC) message of network side equipment, wherein the RRC message comprises a candidate reference signal list;
and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
Optionally, after sending the random access message msg1, the method further comprises:
the random access message msg2 sent by the network side device on one beam is received.
Optionally, after receiving the random access message msg2, the method further comprises:
and sending a random access message msg3 on an uplink sending beam consistent with the beam direction.
Optionally, after sending the random access message msg3, the method further comprises:
and receiving a random access message msg4 sent by the network side equipment.
Optionally, after sending the random access message msg1, the method further comprises:
after the random access message msg2 or the random access message msg4 is not received, the transmission power of the random access message msg1 is increased.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
The embodiment of the invention provides a random access method which is applied to network side equipment and comprises the following steps:
a receiving terminal sends a random access message msg1 on at least one uplink sending beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink sending beam;
and selecting an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmitting a random access message msg2 on a downlink beam corresponding to the optimal uplink transmission beam.
Optionally, selecting the optimal uplink transmission beam includes any one of:
selecting an uplink transmitting wave beam with the optimal performance parameter of the reference signal;
when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
Optionally, after sending the random access message msg2, the method further comprises:
and receiving a random access message msg3 sent by the terminal on an uplink sending beam, wherein the direction of the uplink sending beam is consistent with the direction of a downlink beam for sending the random access message msg 2.
Optionally, after receiving the random access message msg3, the method further comprises:
and sending a random access message msg4 to the terminal.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
Optionally, the reference signal comprises a synchronization signal block and/or a channel state information reference signal.
An embodiment of the present invention provides a random access device, which is applied to a terminal, and includes:
the processing module is used for selecting at least one downlink receiving beam for random access according to the uplink beam selection capacity of the processing module;
and the sending module is used for initiating random access on at least one uplink sending beam matched with at least one downlink receiving beam.
Optionally, the sending module is specifically configured to sort at least one downlink receiving beam according to a performance parameter of a reference signal, so as to obtain a sequence number of each downlink receiving beam; generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
Optionally, the apparatus further comprises:
a receiving module, configured to receive a radio resource control RRC message of a network side device, where the RRC message includes a candidate reference signal list; and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
Optionally, the receiving module is further configured to receive a random access message msg2 sent by the network side device on a beam.
Optionally, the sending module is further configured to send a random access message msg3 on an uplink sending beam consistent with the beam direction.
Optionally, the receiving module is further configured to receive a random access message msg4 sent by the network side device.
Optionally, the processing module is further configured to increase the transmit power of the random access message msg1 after the random access message msg2 or the random access message msg4 is not received.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
An embodiment of the present invention provides a random access apparatus, which is applied to a terminal, including a processor and a transceiver,
The processor is used for selecting at least one downlink receiving beam for random access according to the uplink beam selection capacity of the processor;
the transceiver is configured to initiate random access on at least one uplink transmit beam that matches at least one of the downlink receive beams.
Optionally, the transceiver is specifically configured to sort at least one of the downlink reception beams according to a performance parameter of the reference signal, so as to obtain a sequence number of each downlink reception beam; generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
Optionally, the transceiver is further configured to receive a radio resource control RRC message of the network side device, where the RRC message includes a candidate reference signal list; and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
Optionally, the transceiver is further configured to receive a random access message msg2 sent by the network side device on a beam.
Optionally, the transceiver is further configured to transmit a random access message msg3 on an uplink transmission beam that coincides with the beam direction.
Optionally, the transceiver is further configured to receive a random access message msg4 sent by the network side device.
Optionally, the processor is further configured to increase the transmit power of the random access message msg1 after not receiving the random access message msg2 or the random access message msg4.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
The embodiment of the invention provides a random access device which is applied to network side equipment and comprises:
a receiving module, configured to receive a random access message msg1 sent by a terminal on at least one uplink sending beam, where msg1 includes a sequence number corresponding to the at least one uplink sending beam;
and the sending module is used for selecting an optimal uplink sending beam from the at least one uplink sending beam according to the random access message msg1 and sending a random access message msg2 on a downlink beam corresponding to the optimal uplink sending beam.
Optionally, the sending module is specifically configured to select an uplink sending beam with an optimal performance parameter of the reference signal; when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
Optionally, the receiving module is further configured to receive a random access message msg3 sent by the terminal on an uplink sending beam, where a direction of the uplink sending beam is consistent with a direction of a downlink beam for sending the random access message msg 2.
Optionally, the sending module is further configured to send a random access message msg4 to the terminal.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
Optionally, the reference signal comprises a synchronization signal block and/or a channel state information reference signal.
An embodiment of the present invention provides a random access apparatus, applied to a network side device, including a processor and a transceiver,
the transceiver is configured to receive a random access message msg1 sent by a terminal on at least one uplink sending beam, where msg1 includes a sequence number corresponding to the at least one uplink sending beam; and selecting an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmitting a random access message msg2 on a downlink beam corresponding to the optimal uplink transmission beam.
Optionally, the transceiver is specifically configured to select an uplink transmission beam with an optimal performance parameter of the reference signal; when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
Optionally, the transceiver is further configured to receive a random access message msg3 sent by the terminal on an uplink transmission beam, where a direction of the uplink transmission beam is consistent with a direction of a downlink beam on which the random access message msg2 is sent.
Optionally, the transceiver is further configured to send a random access message msg4 to the terminal.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
Optionally, the reference signal comprises a synchronization signal block and/or a channel state information reference signal.
An embodiment of the present invention provides a communication apparatus including: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps in the random access method as described above.
Embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in a random access method as described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, the terminal selects at least one downlink receiving beam for random access according to its own uplink beam selection capability, and initiates random access on at least one uplink transmitting beam matched with at least one downlink receiving beam. The technical solution of the embodiment considers the uplink beam selection capability of the terminal in the random access process, which is not considered in the current random access process, and may cause the increase of uplink random access power consumption and random access failure, and the technical solution of the embodiment can solve the problems of the increase of power consumption or random access failure caused by the failure of uplink beam transmission.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of candidate beams;
fig. 2 is a flow chart of a random access method of a terminal according to an embodiment of the present invention;
fig. 3 is a flow chart of a random access method of a network side device according to an embodiment of the present invention;
fig. 4 is a flow chart of a random access method according to an embodiment of the present invention;
fig. 5 is a block diagram of a random access device of a terminal according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a random access device of a terminal according to an embodiment of the present invention;
fig. 7 is a block diagram of a random access device of a network side device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a random access device of a network side device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments.
Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. "and/or" in the specification and claims means at least one of the connected objects.
The techniques described herein are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems and may also be used for various wireless communication systems such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, universal terrestrial radio access (Universal Terrestrial Radio Access, UTRA), and the like. UTRA includes wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as the global system for mobile communications (Global System for Mobile Communication, GSM). OFDMA systems may implement radio technologies such as ultra mobile broadband (UltraMobile Broadband, UMB), evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, and the like. UTRA and E-UTRA are parts of the universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS). LTE and higher LTE (e.g., LTE-a) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-a and GSM are described in the literature from an organization named "third generation partnership project" (3rd Generation Partnership Project,3GPP). CDMA2000 and UMB are described in the literature from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. However, the following description describes an NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.
The following description provides examples and does not limit the scope, applicability, or configuration as set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
Currently, two terminal capabilities are defined in the related communication protocol according to the active selection or scanning selection of the uplink transmission beam aiming at the millimeter wave frequency band, wherein the two terminal capabilities are respectively the capability of supporting uplink automatic beam selection (beam correspondence capability) and the capability of supporting beam selection based on uplink beam scanning. The beam selection capability based on uplink beam scanning means that the terminal cannot autonomously determine the optimal uplink transmission beam, but needs to send sounding information on corresponding resources based on sounding reference signal (Sounding Reference Signal, SRS) information configured by the base station, the base station determines the optimal uplink beam of the terminal (UE) after receiving the information, and notifies the UE of the uplink beam finally selected, and the UE selects to send uplink data at the corresponding optimal uplink beam position according to the base station.
In the related art, the terminal may not find the optimal uplink transmission beam, and the main reasons include: 1) Downlink receiving optimal wave beam evaluating error; 2) The generated uplink transmission beam is not matched with the downlink reception beam, and the uplink transmission beam comprises phase and antenna gain errors and the like. Wherein compared with the reason 1), the influence of the reason 2) is larger, for the terminal which determines the uplink beam capability based on the scanning mode, under the condition of lacking the assistance of the base station configuration parameters, the millimeter wave scene has inconformity of the uplink transmission beam and the downlink reception beam, and even has the condition that the generated uplink transmission beam and the selected downlink reception beam have two beam intervals.
In the current random access procedure, it is assumed that the terminal has the capability of generating an uplink transmission beam matching with a synchronization Signal block (Synchronization Signal Block, SSB) and/or a channel state information Reference Signal (Channel State Information-Reference Signal, CSI-RS) according to the downlink beam, but in the related art, there is a case that the uplink transmission beam is inconsistent with the downlink reception beam, and even there is a case that the generated uplink transmission beam and the selected downlink reception beam have two beam intervals, so that the problem of error in selecting the uplink beam in the random access uplink procedure occurs.
If the difference of antenna gain, path loss and the like between the generated uplink error beam and the theoretical beam is small, the gain loss can be compensated by increasing the random access transmitting power, but higher transmitting power can generate higher power consumption. If the difference of antenna gain, path loss, etc. between the generated uplink error beam and the theoretical beam is large, the difference cannot be compensated by the existing random access flow, so that the random access fails, and the terminal cannot perform normal communication.
For example, for random access caused by beam fault recovery (beam failure recovery), the terminal can only select one SSB from the candidate beam list with a synchronization signal reference signal received power (SS-RSRP) greater than the threshold, and if uplink beam selection fails, there may be a case where the SS-RSRP of the downlink SSB corresponding to the actually generated transmission uplink beam is less than the threshold and even does not belong to the reference signal list configured by the radio resource control (Radio Resource Control, RRC) message, although the SS-RSRP of the selected downlink SSB is greater than the threshold, thereby causing a random access failure problem. Taking fig. 1 as an example, assume that SS-RSRP of beams numbered 1,2,3, and 4 are all greater than the threshold and are among RRC configured candidate beams, but SS-RSRP of beam numbered 5 is less than the threshold and does not belong to RRC configured candidate beam, and the reception beam actually selected by the UE is the optimal beam 2, but the generated transmission beam is beam 5, resulting in random access failure.
In the random access process, the terminal does not report the terminal capability actually supported by the terminal, so the base station has no specific terminal capability, namely, whether the terminal supports autonomous uplink beam selection or uplink beam selection based on a scanning mode.
In order to solve the above problems, embodiments of the present invention provide a random access method and apparatus, which can solve the problem of increased power consumption or random access failure caused by uplink beam transmission failure.
The embodiment of the invention provides a random access method applied to a terminal, as shown in fig. 2, comprising the following steps:
step 101: selecting at least one downlink receiving beam for random access according to the uplink beam selection capability of the device;
step 102: random access is initiated on at least one uplink transmit beam that matches at least one of the downlink receive beams.
In this embodiment, the terminal selects at least one downlink reception beam for random access according to its uplink beam selection capability, and initiates random access on at least one uplink transmission beam that matches with at least one of the downlink reception beams. The technical solution of the embodiment considers the uplink beam selection capability of the terminal in the random access process, which is not considered in the current random access process, and may cause the increase of uplink random access power consumption and random access failure, and the technical solution of the embodiment can solve the problems of the increase of power consumption or random access failure caused by the failure of uplink beam transmission.
Optionally, the initiating random access on at least one uplink transmission beam matched with at least one downlink reception beam includes:
sequencing at least one downlink receiving beam according to the performance parameters of the reference signals to obtain the serial number of each downlink receiving beam;
generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
Optionally, before the selecting at least one downlink receiving beam for random access according to the uplink beam selection capability of the method, the method further includes:
receiving a Radio Resource Control (RRC) message of network side equipment, wherein the RRC message comprises a candidate reference signal list;
and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
Optionally, after sending the random access message msg1, the method further comprises:
the random access message msg2 sent by the network side device on one beam is received.
Optionally, after receiving the random access message msg2, the method further comprises:
and sending a random access message msg3 on an uplink sending beam consistent with the beam direction.
Optionally, after sending the random access message msg3, the method further comprises:
and receiving a random access message msg4 sent by the network side equipment.
Optionally, after sending the random access message msg1, the method further comprises:
after the random access message msg2 or the random access message msg4 is not received, the transmission power of the random access message msg1 is increased.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
The embodiment of the invention provides a random access method applied to network side equipment, as shown in fig. 3, comprising the following steps:
step 201: a receiving terminal sends a random access message msg1 on at least one uplink sending beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink sending beam;
Step 202: and selecting an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmitting a random access message msg2 on a downlink beam corresponding to the optimal uplink transmission beam.
Optionally, selecting the optimal uplink transmission beam includes any one of:
selecting an uplink transmitting wave beam with the optimal performance parameter of the reference signal;
when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
Optionally, after sending the random access message msg2, the method further comprises:
and receiving a random access message msg3 sent by the terminal on an uplink sending beam, wherein the direction of the uplink sending beam is consistent with the direction of a downlink beam for sending the random access message msg2.
Optionally, after receiving the random access message msg3, the method further comprises:
And sending a random access message msg4 to the terminal.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
Optionally, the reference signal comprises a synchronization signal block and/or a channel state information reference signal.
In one embodiment, as shown in fig. 4, the random access method includes the following steps:
1. the UE selects corresponding SSB or CSI-RS according to a certain criterion, and the specific method comprises the following steps: if the RRC configures a candidate reference signal list, selecting from the corresponding list, and if SSB or CSI-RS with SS-RSRP larger than a threshold value exists, selecting the corresponding SSB or CSI-RS;
2. the UE selects one or more downlink receiving beams according to the uplink beam selection capacity of the UE, sorts the downlink beams according to the signal intensity and quality of the SSB and/or the CSI-RS, and records the sorting sequence number; one or more uplink transmit beams are then generated that match, and a random access message msg1 is transmitted on a corresponding physical random access channel (Physical Random Access Channel, PRACH) occasion (occalasion) and the rank order number of that beam is contained therein. For example, for a terminal supporting weak uplink beam selection capability, although the optimal downlink reception beam may be determined according to the index of SSB signal quality, strength, etc., since its own uplink beam generation capability is weak and the optimal uplink beam cannot be generated, 3 beams with the strongest downlink reception beam strength and quality are selected, and the three beams are ranked according to signal strength and quality, for example, the ranking sequence is SSB2, SSB1, SSB3. The terminal respectively transmits msg1 information on three uplink beams corresponding to SSB2, SSB1 and SSB3, wherein the information comprises beam sequencing serial numbers 1, 2 and 3;
3. The base station receives a random access preamble (preamble) transmitted by the terminal on one or more beams, selects a corresponding downlink beam, and transmits a random access response signal msg2. Wherein the selection of the corresponding downstream beam selection principle comprises:
transmitting msg2 in the downlink beam direction corresponding to the beam with the best uplink signal quality and strength;
only when the quality difference or the intensity difference between the optimal uplink received signal and the suboptimal uplink received signal is larger than a certain threshold value, selecting the downlink beam direction corresponding to the optimal uplink beam, and transmitting msg2; otherwise, comprehensively considering the received uplink beam signals and the beam sequencing sequence number reported by the terminal, selecting the optimal downlink beam direction, and sending msg2;
the signal evaluation indexes comprise indexes such as RSRP\RSRQ\SINR;
4. the UE monitors a corresponding random access response signal msg2 in the downlink beam direction selected in the step 2, and the current random access is considered to be successful as long as the msg2 on one beam is received;
5. the UE transmits msg3 information, wherein the uplink beam direction of the msg3 is consistent with the beam for receiving the msg2;
6. the base station transmits competition resolving information msg4;
7. if the msg2 in the step 2 or the msg4 in the step 6 fails to receive the information, the terminal increases the random access probability by increasing the transmitting power.
In this embodiment, the UE selects one or more downlink reception beams according to its uplink beam selection capability, sorts the multiple downlink beams according to SSB and/or CSI-RS signal strength and quality, and records the sorting sequence number; one or more uplink transmission beams matched with the uplink transmission beams are then generated, the random access msg1 is transmitted on the corresponding PRACH occasin, and the sequence number of the beam is contained in the random access msg 1. The base station receives random access preamble sent by the terminal on one or more beams, selects a corresponding downlink beam, and sends a random access response signal msg2, wherein the selection principle of the corresponding downlink beam comprises: transmitting msg2 in the downlink beam direction corresponding to the beam with the best uplink signal quality and strength; only when the quality difference or the intensity difference between the optimal uplink received signal and the suboptimal uplink received signal is larger than a certain threshold value, selecting the downlink beam direction corresponding to the optimal uplink beam, and transmitting msg2; otherwise, comprehensively considering the received uplink beam signals and the beam sequencing sequence number reported by the terminal, selecting the optimal downlink beam direction, and transmitting msg2. The technical solution of the embodiment considers the uplink beam selection capability of the terminal in the random access process, which is not considered in the current random access process, and may cause the increase of uplink random access power consumption and random access failure, so as to solve the problem of power consumption increase or random access failure caused by uplink beam transmission failure.
An embodiment of the present invention provides a random access device, which is applied to a terminal, as shown in fig. 5, including:
a processing module 31, configured to select at least one downlink reception beam for random access according to its uplink beam selection capability;
a transmitting module 32, configured to initiate random access on at least one uplink transmission beam matching at least one of the downlink reception beams.
In this embodiment, the terminal selects at least one downlink reception beam for random access according to its uplink beam selection capability, and initiates random access on at least one uplink transmission beam that matches with at least one of the downlink reception beams. The technical solution of the embodiment considers the uplink beam selection capability of the terminal in the random access process, which is not considered in the current random access process, and may cause the increase of uplink random access power consumption and random access failure, and the technical solution of the embodiment can solve the problems of the increase of power consumption or random access failure caused by the failure of uplink beam transmission.
Optionally, the sending module 32 is specifically configured to sort at least one of the downlink receiving beams according to the performance parameter of the reference signal, so as to obtain a sequence number of each downlink receiving beam; generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
Optionally, the apparatus further comprises:
a receiving module, configured to receive a radio resource control RRC message of a network side device, where the RRC message includes a candidate reference signal list; and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
Optionally, the receiving module is further configured to receive a random access message msg2 sent by the network side device on a beam.
Optionally, the sending module 32 is further configured to send a random access message msg3 on an uplink sending beam consistent with the beam direction.
Optionally, the receiving module is further configured to receive a random access message msg4 sent by the network side device.
Optionally, the processing module 31 is further configured to increase the transmit power of the random access message msg1 after the random access message msg2 or the random access message msg4 is not received.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
An embodiment of the present invention provides a random access apparatus, applied to a terminal, as shown in fig. 6, including a processor 41 and a transceiver 42,
The processor 41 is configured to select at least one downlink reception beam for random access according to its uplink beam selection capability;
the transceiver 42 is configured to initiate random access on at least one uplink transmit beam that matches at least one of the downlink receive beams.
In this embodiment, the terminal selects at least one downlink reception beam for random access according to its uplink beam selection capability, and initiates random access on at least one uplink transmission beam that matches with at least one of the downlink reception beams. The technical solution of the embodiment considers the uplink beam selection capability of the terminal in the random access process, which is not considered in the current random access process, and may cause the increase of uplink random access power consumption and random access failure, and the technical solution of the embodiment can solve the problems of the increase of power consumption or random access failure caused by the failure of uplink beam transmission.
Optionally, the transceiver 42 is specifically configured to sort at least one of the downlink reception beams according to a performance parameter of a reference signal, so as to obtain a sequence number of each downlink reception beam; generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
Optionally, the transceiver 42 is further configured to receive a radio resource control RRC message of a network side device, where the RRC message includes a candidate reference signal list; and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
Optionally, the transceiver 42 is further configured to receive a random access message msg2 sent by a network side device on a beam.
Optionally, the transceiver 42 is further configured to transmit a random access message msg3 on an uplink transmission beam that coincides with the beam direction.
Optionally, the transceiver 42 is further configured to receive a random access message msg4 sent by the network side device.
Optionally, the processor 41 is further configured to increase the transmit power of the random access message msg1 after not receiving the random access message msg2 or the random access message msg4.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
The embodiment of the invention provides a random access device, which is applied to network side equipment, as shown in fig. 7, and comprises:
A receiving module 51, configured to receive a random access message msg1 sent by a terminal on at least one uplink sending beam, where msg1 includes a sequence number corresponding to the at least one uplink sending beam;
a transmitting module 52, configured to select an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmit a random access message msg2 on a downlink beam corresponding to the optimal uplink transmission beam.
Optionally, the transmitting module 52 is specifically configured to select an uplink transmission beam with an optimal performance parameter of the reference signal; when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
Optionally, the receiving module 51 is further configured to receive a random access message msg3 sent by the terminal on an uplink sending beam, where a direction of the uplink sending beam is consistent with a direction of a downlink beam for sending the random access message msg2.
Optionally, the sending module 52 is further configured to send a random access message msg4 to the terminal.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
Optionally, the reference signal comprises a synchronization signal block and/or a channel state information reference signal.
The embodiment of the invention provides a random access device, which is applied to network side equipment, as shown in fig. 8, and comprises a processor 61 and a transceiver 62,
the transceiver 62 is configured to receive a random access message msg1 sent by a terminal on at least one uplink transmission beam, where msg1 includes a sequence number corresponding to the at least one uplink transmission beam; and selecting an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmitting a random access message msg2 on a downlink beam corresponding to the optimal uplink transmission beam.
Optionally, the transceiver 62 is specifically configured to select an uplink transmission beam with an optimal performance parameter of the reference signal; when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
Optionally, the transceiver 62 is further configured to receive a random access message msg3 sent by the terminal on an uplink transmission beam, where the direction of the uplink transmission beam is identical to the direction of the downlink beam on which the random access message msg2 is sent.
Optionally, the transceiver 62 is further configured to send a random access message msg4 to the terminal.
Optionally, the performance parameter includes at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
Optionally, the reference signal comprises a synchronization signal block and/or a channel state information reference signal.
An embodiment of the present invention provides a communication apparatus including: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps in the random access method as described above.
Embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in a random access method as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (DSP devices, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
It will be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, user terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing user terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing user terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing user terminal device to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing user terminal device to cause a series of operational steps to be performed on the computer or other programmable user terminal device to produce a computer implemented process such that the instructions which execute on the computer or other programmable user terminal device provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or user terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or user terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude that an additional identical element is present in a process, method, article or user terminal device comprising the element.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and such modifications and changes are intended to be within the scope of the present invention.
Claims (19)
1. A random access method, applied to a terminal, comprising:
selecting at least one downlink receiving beam for random access according to the uplink beam selection capability of the device;
initiating random access on at least one uplink transmit beam matched to at least one of the downlink receive beams;
the initiating random access on at least one uplink transmit beam matched to at least one of the downlink receive beams comprises:
sequencing at least one downlink receiving beam according to the performance parameters of the reference signals to obtain the serial number of each downlink receiving beam;
generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
2. The random access method according to claim 1, wherein before selecting at least one downlink reception beam for random access according to its own uplink beam selection capability, the method further comprises:
Receiving a Radio Resource Control (RRC) message of network side equipment, wherein the RRC message comprises a candidate reference signal list;
and selecting a synchronous signal block and/or a channel state information reference signal with synchronous signal reference signal receiving power SS-RSRP larger than a preset first threshold value from the candidate reference signal list as the reference signal.
3. The random access method according to claim 1, characterized in that after transmitting the random access message msg1, the method further comprises:
the random access message msg2 sent by the network side device on one beam is received.
4. A random access method according to claim 3, characterized in that after receiving the random access message msg2, the method further comprises:
and sending a random access message msg3 on an uplink sending beam consistent with the beam direction.
5. The random access method according to claim 4, wherein after transmitting the random access message msg3, the method further comprises:
and receiving a random access message msg4 sent by the network side equipment.
6. The random access method according to claim 5, wherein after transmitting the random access message msg1, the method further comprises:
After the random access message msg2 or the random access message msg4 is not received, the transmission power of the random access message msg1 is increased.
7. The random access method of claim 1, wherein the performance parameter comprises at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
8. The random access method is characterized by being applied to network side equipment and comprising the following steps:
a receiving terminal sends a random access message msg1 on at least one uplink sending beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink sending beam;
selecting an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmitting a random access message msg2 on a downlink reception beam corresponding to the optimal uplink transmission beam; the at least one uplink sending beam is matched with at least one downlink receiving beam for random access selected by the terminal according to the uplink beam selection capability of the terminal; and the sequence number corresponding to the uplink transmission beam is the sequence number of the downlink reception beam matched with the uplink transmission beam.
9. The random access method of claim 8, wherein selecting an optimal uplink transmit beam comprises any one of:
selecting an uplink transmitting wave beam with the optimal performance parameter of the reference signal;
when the difference between the optimal performance parameter and the suboptimal performance parameter of the reference signal of the at least one uplink transmission beam is larger than a preset threshold, selecting the uplink transmission beam with the optimal performance parameter of the reference signal; and when the difference value between the optimal performance parameter and the suboptimal performance parameter is smaller than or equal to a preset threshold value, selecting an uplink transmission beam according to the corresponding sequence number of the uplink transmission beam and the performance parameter of the reference signal of the uplink transmission beam.
10. The random access method according to claim 8, characterized in that after transmitting the random access message msg2, the method further comprises:
and receiving a random access message msg3 sent by the terminal on an uplink sending beam, wherein the direction of the uplink sending beam is consistent with the direction of a downlink receiving beam for sending the random access message msg 2.
11. The random access method according to claim 10, characterized in that after receiving the random access message msg3, the method further comprises:
And sending a random access message msg4 to the terminal.
12. The random access method of claim 9, wherein the performance parameter comprises at least one of:
reference signal received power RSRP;
reference signal received quality RSRQ;
signal to interference plus noise ratio SINR.
13. The random access method according to claim 9, wherein,
the reference signals include synchronization signal blocks and/or channel state information reference signals.
14. A random access device, for use in a terminal, comprising:
the processing module is used for selecting at least one downlink receiving beam for random access according to the uplink beam selection capacity of the processing module;
a transmitting module, configured to initiate random access on at least one uplink transmission beam that matches at least one of the downlink reception beams;
the sending module is specifically configured to sort at least one downlink receiving beam according to a performance parameter of a reference signal, so as to obtain a sequence number of each downlink receiving beam; generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
15. A random access device is characterized by being applied to a terminal and comprising a processor and a transceiver,
the processor is used for selecting at least one downlink receiving beam for random access according to the uplink beam selection capacity of the processor;
the transceiver is configured to initiate random access on at least one uplink transmit beam that matches at least one of the downlink receive beams;
the transceiver is specifically configured to sort at least one downlink reception beam according to a performance parameter of a reference signal, so as to obtain a sequence number of each downlink reception beam; generating at least one uplink transmission beam matched with at least one downlink reception beam, and transmitting a random access message msg1 on the at least one uplink transmission beam, wherein the msg1 comprises a sequence number corresponding to the at least one uplink transmission beam, and the sequence number corresponding to the uplink transmission beam is a sequence number of a downlink reception beam matched with the uplink transmission beam.
16. A random access apparatus, applied to a network side device, comprising:
a receiving module, configured to receive a random access message msg1 sent by a terminal on at least one uplink sending beam, where msg1 includes a sequence number corresponding to the at least one uplink sending beam;
A transmitting module, configured to select an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmit a random access message msg2 on a downlink reception beam corresponding to the optimal uplink transmission beam; the at least one uplink sending beam is matched with at least one downlink receiving beam for random access selected by the terminal according to the uplink beam selection capability of the terminal; and the sequence number corresponding to the uplink transmission beam is the sequence number of the downlink reception beam matched with the uplink transmission beam.
17. A random access device is characterized by being applied to network side equipment and comprising a processor and a transceiver,
the transceiver is configured to receive a random access message msg1 sent by a terminal on at least one uplink sending beam, where msg1 includes a sequence number corresponding to the at least one uplink sending beam; selecting an optimal uplink transmission beam from the at least one uplink transmission beam according to the random access message msg1, and transmitting a random access message msg2 on a downlink reception beam corresponding to the optimal uplink transmission beam; the at least one uplink sending beam is matched with at least one downlink receiving beam for random access selected by the terminal according to the uplink beam selection capability of the terminal; and the sequence number corresponding to the uplink transmission beam is the sequence number of the downlink reception beam matched with the uplink transmission beam.
18. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor realizes the steps in the random access method according to any of claims 1 to 13.
19. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps in the random access method according to any of claims 1 to 13.
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