CN113727466B - Method and system for completing RRC connection establishment in 5G NR - Google Patents

Method and system for completing RRC connection establishment in 5G NR Download PDF

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Publication number
CN113727466B
CN113727466B CN202111074550.4A CN202111074550A CN113727466B CN 113727466 B CN113727466 B CN 113727466B CN 202111074550 A CN202111074550 A CN 202111074550A CN 113727466 B CN113727466 B CN 113727466B
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base station
information
pucch
scheduling request
rrc connection
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CN113727466A (en
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谭文婷
张飞
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Shanghai Zhongxing Yilian Communication Co ltd
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Shanghai Zhongxing Yilian Communication Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method and a system for establishing RRC connection in 5G NR, which comprises the steps that a base station issues RRCSetup messages, and physical uplink control channel resource configuration information PUCCH-Config is configured in the messages; the user terminal UE receives RRCSetup information; the base station detects ACK on a physical uplink control channel common resource PUCCH-ResourceCommon, and detects a scheduling request SR on a scheduling request SR resource at the same time; the base station detects whether ACK information fed back by the UE is received or not; if the ACK information is not received and the scheduling request SR information sent by the user terminal UE is detected, the base station continues to perform radio resource control RRC to establish connection so as to complete connection. Meanwhile, a system for establishing RRC connection in 5G NR is also provided, which comprises a base station and a user terminal, when the base station does not receive ACK information and detects scheduling request SR information sent by user terminal UE, the base station continues to establish connection in RRC, so that the effect of establishing RRC connection can be successfully completed without depending on the ACK information fed back by the UE, and the probability of success of establishing RRC connection is improved.

Description

Method and system for completing RRC connection establishment in 5G NR
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and system for completing connection establishment of radio resource control (Radio Resource Control, RRC) in 5G NR, and an electronic device.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
With the development of the mobile internet, more and more devices are accessed into the mobile network, and new services and applications are endless. The surge in mobile data traffic will pose a serious challenge to the network. To meet the increasing mobile traffic demands, fifth generation (5th Generation,5G) mobile communication networks have evolved. The data transmission rate of a 5G network is 100 times faster than the wired internet, faster than the previous 4G LTE cellular network, and has lower network latency.
In an NR communication system, before communication is implemented between a base station and a user terminal UE, both are required to first complete connection establishment, i.e., RRC connection establishment. The radio resource control (Radio Resource Control, RRC) manages, controls and schedules radio resources by a certain strategy and means, and fully utilizes limited radio network resources as much as possible under the condition of meeting the requirement of service quality, ensures reaching the planned coverage area, and improves service capacity and resource utilization rate as much as possible. After completing the RRC connection setup, the UE can send an attach message to the base station.
Currently, the conventional method for the base station to complete RRC connection establishment is: the base station sends RRCSetup (radio resource control establishment) information to the UE until the ACK information fed back by the UE is detected, and the UE is confirmed to successfully receive RRCSetup information; and then the base station detects the SR information sent by the UE, and issues DCI 0-0 to schedule uplink to complete RRC connection establishment. In RRCSetup messages sent by the base station to the UE, dedicated PUCCH resources of physical uplink control channel resource configuration information PUCCH-Config are typically configured. Before the UE is not configured with PUCCH-Config, PUCCH-ResourceCommon is used for the UE to feed back ACK/NACK. Once the UE obtains the dedicated resource PUCCH-Config, the common resource PUCCH-ResourceCommon is discarded and the dedicated PUCCH-Config is used. At this time, if the UE side has validated PUCCH-Config and the base station still detects ACK on PUCCH-ResourceCommon, the base station cannot receive ACK information according to the conventional method, and RRC connection establishment is not completed, resulting in UE access failure.
And, the 5G NR protocol stack does not explicitly indicate the RRC message in which the PUCCH-Config is configured, and whether the corresponding ACK/NACK feedback employs the dedicated PUCCH-Config or the common PUCCH-ResourceCommon. Thus, when dedicated PUCCH-Config is active depends on UE implementation. However, whether the ACK feedback of RRCSetup messages adopts the common PUCCH resource or the dedicated PUCCH resource is unknown to the base station. Thus, when ACK information is not detected, the base station cannot perform the next RRC connection establishment.
Therefore, there is a need to provide a method and system for RRC connection establishment that can smoothly complete the subsequent procedure without depending on ACK information fed back by the UE, so as to solve the above-mentioned problems.
Term interpretation:
NR is New Radio, new air interface.
ACK: acknowledgement Character, confirm characters. In data communication, a transmission type control character is sent to a transmitting end by a receiving end, which indicates that the transmitted data is confirmed to be received without errors.
SR Schedule Request, scheduling Request.
DCI: downlink Control Information downlink control information, carried by the downlink physical control channel, the downlink control information sent by the base station to the UE includes uplink and downlink resource allocation, HARQ information, power control, and the like. DCI 0_0 is used to provide control information related to a physical uplink shared channel when scheduling transmission of the physical uplink shared channel in an uplink direction.
PUCCH: physical Uplink Control Channel, a physical uplink control channel, is used for the terminal to send information related to uplink scheduling, such as scheduling request SR (Scheduling Request), ACK/NACK feedback, and channel condition information CSI (Channel Status Information), to the base station.
Disclosure of Invention
In order to solve at least one of the above problems, the present invention provides a method and a system for completing RRC connection establishment in 5G NR, so that a base station not only relies on ACK/NACK information fed back by a UE for RRC messages, but also detects SR sent by the UE, thereby completing RRC connection establishment and validating dedicated PUCCH resources. The method is also suitable for completing the connection reconfiguration process when the special PUCCH resource is configured in the RRC reconfiguration RRCReconfig message.
The method for completing the establishment of the Radio Resource Control (RRC) connection in the 5G NR comprises the following steps:
s1, a base station issues a radio resource control establishment RRCSetup message, and physical uplink control channel resource configuration information PUCCH-Config is configured in the message;
S2, receiving a radio resource control establishment RRCSetup message by User Equipment (UE);
S3, the base station detects ACK on a physical uplink control channel public resource pucch-ResourceCommon, and detects a scheduling request SR on a scheduling request SR resource at the same time;
s4: the base station detects whether ACK information fed back by the UE is received or not;
and S5, if the ACK information is not received and the scheduling request SR sent by the user terminal UE is detected, the base station continues to establish RRC connection to complete connection.
Optionally, the following procedure is further included after step S4:
S4-1: if the base station detects that the UE feeds back the ACK information, the base station confirms that the physical uplink control channel resource configuration information PUCCH-Config takes effect, and continues to establish the radio resource control RRC connection to complete the connection.
Optionally, the step S4-1 specifically includes the following steps:
S4-11: if the base station detects that the UE feeds back the ACK information, confirming that the configuration of physical uplink control channel resource configuration information (PUCCH-Config) takes effect;
s4-12, if the base station further detects a scheduling request SR, the base station transmits downlink control information DCI 0-0 for uplink scheduling;
s4-13, a user terminal (UE) receives Downlink Control Information (DCI) 0-0 and sends uplink data;
and S4-14, the radio resource control RRC at the base station side receives a message of completing the establishment of the radio resource control RRCSetupComplete, and the establishment of the radio resource control RRC is successful.
Optionally, step S5 specifically includes the following procedures:
S5-1: if the base station does not receive the ACK information, further detecting a scheduling request SR sent by the user terminal UE;
S5-2: if the base station detects a scheduling request SR, transmitting downlink control information DCI 0-0 for uplink scheduling;
s5-3, a user terminal (UE) receives Downlink Control Information (DCI) 0-0 and sends uplink data;
S5-4, the MAC of the base station side multimedia access control layer receives a first uplink data uplink dedicated control channel UL-DCCH, and if the CRC passes, the configuration of physical uplink control channel resource configuration information PUCCH-Config is confirmed to be effective;
s5-5, the base station side radio resource control RRC receives the radio resource control establishment completion RRCSetupComplete message, and the radio resource control RRC is successfully established.
Optionally, the physical uplink control channel resource configuration information PUCCH-Config is used for a scheduling request SR, channel state information CSI, a physical uplink control channel resource set 0PUCCH Resource SET0, a physical uplink control channel resource set 1PUCCH Resource SET1.
Optionally, the uplink control information UCI < =2bit of the physical uplink control channel resource set 0PUCCH Resource SET0, and the uplink control information UCI >2bit of the physical uplink control channel resource set 1PUCCH Resource SET1.
In addition, the invention also provides a system for completing the establishment of the Radio Resource Control (RRC) connection in the 5G NR, which comprises the following steps:
A base station, configured to issue a radio resource control setup RRCSetup message to a UE, where physical uplink control channel resource configuration information PUCCH-Config is configured in the message; detecting ACK on a physical uplink control channel common resource pucch-ResourceCommon, and simultaneously detecting a scheduling request SR on a scheduling request SR resource; when the ACK information is not received and the scheduling request SR sent by the UE is detected, continuing the RRC connection establishment to complete the connection;
A user terminal UE, configured to receive a radio resource control setup RRCSetup message sent by a base station; feeding back ACK and SR information to the base station; and sending uplink data based on the uplink scheduling requirement of the base station.
Optionally, when the base station receives the ACK fed back by the UE, the PUCCH-Config is considered to be effective; the base station further detects the SR and sends DCI 0-0 for uplink scheduling; the UE receives DCI 0-0 and sends uplink data; the base station successfully receives RRCSetupComplete message and the RRC establishment is successful.
Optionally, if the base station does not receive the ACK information and detects a scheduling request SR sent by the user terminal UE, the base station sends downlink control information DCI 0-0 for uplink scheduling; the User Equipment (UE) receives Downlink Control Information (DCI) 0-0 and sends uplink data; the MAC of the base station side receives the first uplink data uplink dedicated control channel (UL-DCCH) and confirms that the configuration of physical uplink control channel resource configuration information (PUCCH-Config) takes effect if the CRC passes; the base station side radio resource control RRC receives the radio resource control establishment completion RRCSetupComplete message, and the radio resource control RRC is successfully established.
In addition, the invention also provides electronic equipment, which comprises:
a memory for storing a computer program;
And a processor for executing the computer program stored in the memory, and realizing the method for completing the RRC connection establishment in the 5G NR when the computer program is executed.
The invention has the advantages and beneficial effects that:
Compared with the method that the RRC connection establishment can be successfully completed only by feeding back the ACK information by the UE in the prior art, the invention provides the method and the system for completing the RRC connection establishment in the 5G NR, and the base station configures the PUCCH-Config in RRCSetup information for SR, CSI, PUCCH Resource SET0 and PUCCH Resource SET1, so that the ACK is detected on a public resource PUCCH-ResourceCommon, the SR is detected on an SR resource, the ACK information which does not depend on the feedback of the UE is achieved, the effect of successfully completing the RRC connection establishment flow is still achieved, and the communication efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only a partial description of some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 schematically shows an overall flow diagram of a method for completing RRC connection establishment in 5G NR in an embodiment.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. It should be understood that these embodiments are presented merely to enable those skilled in the art to better understand and practice the invention and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Those skilled in the art will appreciate that embodiments of the invention may be implemented as a method, system, apparatus, device, or computer program product, etc. Accordingly, the present disclosure may be embodied in the following forms, namely: complete hardware, complete software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
In one embodiment, the present invention provides a method for completing RRC connection establishment in NR, which is applied to a 5G communication system. When the invention establishes the RRC connection, the base station detects the ACK on the PUCCH-ResourceCommon and detects the SR on the SR resource at the same time, and even if the base station does not detect the ACK on the PUCCH-ResourceCommon, the base station can continue establishing the RRC connection as long as the SR is detected on the SR resource, thereby greatly improving the success rate of establishing the RRC connection.
In this embodiment, a method for completing radio resource control RRC connection establishment in 5G NR is provided, including the following steps:
S1, a base station issues RRCSetup messages, and PUCCH-Config is configured in the messages;
s2, receiving RRCSetup information by User Equipment (UE);
S3, the base station detects ACK on the PUCCH-ResourceCommon and detects SR on the SR resource at the same time;
s4: the base station detects whether ACK information fed back by the UE is received or not;
And S5, if the ACK information is not received and the scheduling request SR information sent by the user terminal UE is detected, the base station continues to perform Radio Resource Control (RRC) connection establishment to complete connection.
Among them, 32 PUCCH-resources are configured in maximum in PUCCH-Config (Physical Uplink Control Channel-Config, physical uplink control channel Resource configuration information configuration) information, and information such as PUCCH format information, a starting RB (Resource Block) position, and whether to hop frequency indication is indicated in the PUCCH-resources.
PUCCH-ResourceCommon (Physical Uplink Control Channel-ResourceCommon, physical uplink control channel-common resource) is mainly used for feedback HARQ-ACK.
Preferably, step S4 is followed by the following procedure:
s4-1: if the base station detects that the user terminal UE feeds back the ACK information, confirming that the PUCCH-Config is effective, and continuing to establish the RRC connection to complete the connection.
Preferably, the step S4-1 specifically comprises the following procedures:
s4-11: if the base station detects that the UE feeds back the ACK information, confirming that the PUCCH-Config configuration is effective;
S4-12, if the base station further detects the SR, the base station sends DCI 0-0 for uplink scheduling;
s4-13, receiving DCI 0-0 by User Equipment (UE) and sending uplink data;
S4-14, the RRC at the base station side receives RRCSetupComplete information, and the RRC is established successfully.
The DCI (Downlink Control Information) includes uplink and downlink resource allocation, HARQ information, power control, and the like.
Preferably, step S5 specifically includes the following procedures:
S5-1: if the base station does not receive the ACK information, further detecting the SR sent by the user terminal UE;
s5-2: if the base station detects the SR, the base station sends DCI 0-0 for uplink scheduling;
S5-3, receiving DCI 0-0 by User Equipment (UE) and sending uplink data;
S5-4, a base station side MAC (MEDICAL ACCESS Control, multimedia access Control) layer receives a first uplink data UL-DCCH, and if CRC check is passed, confirming that PUCCH-Config configuration is effective;
s5-5, the RRC at the base station side receives RRCSetupComplete information, and the RRC is established successfully.
The CRC (Cyclic Redundancy Check, cyclic redundancy check code) is a cyclic code, and is a check code with the capability of error detection and error correction. Cyclic redundancy checks are defined by some mathematical operation to establish a contracted relationship between data bits and check bits.
Preferably, the PUCCH-Config is used for SR, CSI, PUCCH Resource SET0, PUCCH Resource SET1.
Among them, CSI (CHANNEL STATE Information) is a channel attribute of a communication link, which can adapt a communication system to a current channel condition, and provides a guarantee for high-reliability and high-rate communication in a multi-antenna system.
PUCCH Resource SET0 (Physical Uplink Control Channel Resource Set, physical uplink control channel resource set 0), PUCCH Resource SET1 (Physical Uplink Control Channel Resource Set, physical uplink control channel resource set 1) are used to configure the dedicated resource PUCCH-Config. Up to 4 PUCCH Resource Set PUCCH-Config are configured, and each Set contains a plurality of PUCCH resources.
Preferably, UCI < = 2 bits (bits) of PUCCH Resource SET, UCI >2 bits of PUCCH Resource SET 1.
The UCI (Uplink Control Information ) may be transmitted in the PUCCH or PUSCH.
In an embodiment, the method for completing RRC connection establishment in 5G NR provided by the present invention includes the following specific operation procedures:
The method comprises the following steps that S1, a base station issues RRCSetup a message, and PUCCH-Config is configured in the message and used for scheduling request SR, channel state information CSI, a physical uplink control channel resource set 0PUCCH Resource SET0 and a physical uplink control channel resource set 1PUCCH Resource SET1;
preferably, UCI < = 2 bits of PUCCH Resource SET, UCI >2 bits of PUCCH Resource SET 1.
S2, receiving RRCSetup information by User Equipment (UE);
S3, the base station detects ACK on the PUCCH-ResourceCommon and detects SR on the SR resource at the same time;
s4: the base station detects whether ACK information fed back by the UE is received or not;
s4-1: if the base station detects that the user terminal UE feeds back the ACK information, confirming that the PUCCH-Config is effective, and continuing to establish the RRC connection to complete the connection. The method specifically comprises the following steps:
s4-11: if the base station detects that the UE feeds back the ACK information, confirming that the PUCCH-Config configuration is effective;
S4-12, if the base station further detects the SR, the base station sends DCI 0-0 for uplink scheduling;
s4-13, a user terminal (UE) receives Downlink Control Information (DCI) 0-0 and sends uplink data;
and S4-14, the radio resource control RRC at the base station side receives a message of completing the establishment of the radio resource control RRCSetupComplete, and the establishment of the radio resource control RRC is successful.
S5, if the ACK information is not received, detecting scheduling request SR information sent by User Equipment (UE);
S5-2: a base station transmits DCI 0-0 for uplink scheduling;
S5-3, receiving DCI 0-0 by User Equipment (UE) and sending uplink data;
S5-4, a base station side MAC (MEDICAL ACCESS Control, multimedia access Control) layer receives a first uplink data UL-DCCH, and if CRC check is passed, confirming that PUCCH-Config configuration is effective;
s5-5, the radio resource control RRC at the base station side receives RRCSetupComplete information, and the radio resource control RRC is successfully established.
In addition, in an embodiment, the present invention also provides a system for completing radio resource control RRC connection establishment in 5G NR, where the system includes:
The base station is used for transmitting RRCSetup a message to the User Equipment (UE), and configuring a PUCCH-Config in the message; detecting an ACK on the PUCCH-ResourceCommon while detecting an SR on the SR resource; when the ACK information is not received and the SR sent by the UE is detected, continuing the RRC connection establishment to complete the connection;
A user terminal UE, configured to receive RRCSetup messages sent by a base station; feeding back ACK and scheduling request SR information to the base station; and sending uplink data based on the uplink scheduling requirement of the base station.
Preferably, when the base station receives the ACK fed back by the user terminal UE, the PUCCH-Config is considered to be effective; the base station further detects the SR and sends DCI 0-0 for uplink scheduling; the UE receives DCI 0-0 and sends uplink data; the base station successfully receives RRCSetupComplete message and the RRC establishment is successful.
Preferably, if the base station does not receive the ACK information and detects a scheduling request SR sent by the user equipment UE, the base station sends DCI 0-0 for uplink scheduling; a user terminal (UE) receives DCI 0-0 and sends uplink data; the MAC at the base station side receives the first uplink data UL-DCCH, and confirms that the PUCCH-Config configuration is effective if the CRC passes; the RRC at the base station side receives RRCSetupComplete information, and the RRC is established successfully.
Specifically, the system for completing the establishment of the Radio Resource Control (RRC) connection in the 5G NR provided by the invention has the following specific operation flow:
The method comprises the following steps that S1, a base station issues RRCSetup a message, and PUCCH-Config is configured in the message and used for scheduling request SR, channel state information CSI, a physical uplink control channel resource set 0PUCCH Resource SET0 and a physical uplink control channel resource set 1PUCCH Resource SET1;
preferably, UCI < = 2 bits of PUCCH Resource SET, UCI >2 bits of PUCCH Resource SET 1.
S2, receiving RRCSetup information by User Equipment (UE);
S3, the base station detects ACK on the PUCCH-ResourceCommon and detects SR on the SR resource at the same time;
s4: the base station detects whether ACK information fed back by the UE is received or not;
s4-1: if the base station detects that the user terminal UE feeds back the ACK information, confirming that the PUCCH-Config is effective, and continuing to establish the RRC connection to complete the connection. The method specifically comprises the following steps:
s4-11: if the base station detects that the UE feeds back the ACK information, confirming that the PUCCH-Config configuration is effective;
S4-12, if the base station further detects the SR, the base station sends DCI 0-0 for uplink scheduling;
s4-13, a user terminal (UE) receives Downlink Control Information (DCI) 0-0 and sends uplink data;
and S4-14, the radio resource control RRC at the base station side receives a message of completing the establishment of the radio resource control RRCSetupComplete, and the establishment of the radio resource control RRC is successful.
S5, if the ACK information is not received, detecting scheduling request SR information sent by User Equipment (UE);
S5-2: a base station transmits DCI 0-0 for uplink scheduling;
S5-3, receiving DCI 0-0 by User Equipment (UE) and sending uplink data;
S5-4, a base station side MAC (MEDICAL ACCESS Control, multimedia access Control) layer receives a first uplink data UL-DCCH, and if CRC check is passed, confirming that PUCCH-Config configuration is effective;
s5-5, the radio resource control RRC at the base station side receives RRCSetupComplete information, and the radio resource control RRC is successfully established.
In addition, in an embodiment, the present invention further provides an electronic device, including:
A memory for a computer program;
and a processor, configured to execute the computer program stored in the memory, and when the computer program is executed, implement the method for completing radio resource control RRC connection establishment in the 5G NR.
The electronic device of this embodiment may be an integrated circuit board, a PC (Personal Computer ), or a portable computing or other electronic device with a processor.
The memory may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) and/or cache memory. The processor executes various functional applications and data processing by running a computer program stored in the memory, and in particular, the processor can execute the computer program stored in the memory, and when the computer program is executed, at least the following instructions are executed:
S1, a base station issues RRCSetup messages, and PUCCH-Config is configured in the messages;
s2, receiving RRCSetup information by User Equipment (UE);
S3, the base station detects ACK on the PUCCH-ResourceCommon and detects SR on the SR resource at the same time;
s4: the base station detects whether ACK information fed back by the UE is received or not;
And S5, if the ACK information is not received and the scheduling request SR information sent by the user terminal UE is detected, the base station continues to perform Radio Resource Control (RRC) connection establishment to complete connection.
Furthermore, while the operations of the method of the present invention are described in a particular order in the embodiments, this does not require or imply that the operations must be performed in the particular order or that all of the illustrated operations be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
While the spirit and principles of the present invention have been described with reference to the above-described embodiments, it is to be understood that the invention is not limited to the disclosed embodiments nor does it imply that features in the various aspects are not useful in combination, which is done for convenience of description. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (9)

1. A method for completing RRC connection establishment in 5G NR, comprising the steps of:
s1, a base station issues a radio resource control establishment RRCSetup message, and physical uplink control channel resource configuration information PUCCH-Config is configured in the message;
S2, receiving a radio resource control establishment RRCSetup message by User Equipment (UE);
S3, the base station detects ACK information on a physical uplink control channel public resource pucch-ResourceCommon, and detects a scheduling request SR on a scheduling request SR resource at the same time;
s4: the base station detects whether ACK information fed back by the UE is received or not;
S5, if the ACK information is not received and a scheduling request SR sent by the user terminal UE is detected, the base station continues to establish RRC connection to complete connection;
The step S5 specifically comprises the following steps:
S5-1: if the base station does not receive the ACK information, further detecting a scheduling request SR sent by the user terminal UE;
S5-2: if the base station detects a scheduling request SR, transmitting downlink control information DCI 0-0 for uplink scheduling;
s5-3: a user terminal (UE) receives DCI 0-0 and sends uplink data;
s5-4: the MAC of the base station side multimedia access control layer receives a first uplink data uplink dedicated control channel (UL-DCCH) and confirms that the configuration of the PUCCH-Config is effective if the CRC passes;
S5-5: the RRC at the base station side receives RRCSetupComplete information, and the RRC is established successfully.
2. The method for completing RRC connection establishment in 5G NR according to claim 1, further comprising the following procedure after step S4:
S4-1: if the base station detects that the UE feeds back the ACK information, the PUCCH-Config is confirmed to be effective, and the RRC connection establishment is continued to complete the connection.
3. The method for completing RRC connection establishment in 5G NR according to claim 2, wherein step S4-1 specifically includes the following steps:
S4-11: if the base station detects that the UE feeds back the ACK information, confirming that the PUCCH-Config configuration is effective; s4-12, if the base station further detects a scheduling request SR, the base station transmits downlink control information DCI 0-0 for uplink scheduling;
s4-13, receiving DCI 0-0 by User Equipment (UE) and sending uplink data;
s4-14, the base station side radio resource control RRC receives the radio resource control establishment completion RRCSetupComplete message, and the RRC establishment is successful.
4. The method for completing RRC connection setup in 5G NR according to claim 1, wherein the physical uplink control channel resource configuration information PUCCH-Config is used for scheduling request SR, channel state information CSI, physical uplink control channel resource set 0PUCCHResource SET0, physical uplink control channel resource set 1PUCCH Resource SET1.
5. The method for completing RRC connection establishment in 5G NR according to claim 4, wherein uplink control information UCI < = 2 bits of PUCCH Resource SET a0, uplink control information UCI >2 bits of PUCCHResource SET a 1.
6. A system for completing RRC connection establishment in 5G NR, comprising:
A base station, configured to issue a radio resource control setup RRCSetup message to the UE, where dedicated physical uplink control channel resource configuration information PUCCH-Config is configured in the message; detecting ACK information on a physical uplink control channel common resource pucch-ResourceCommon, and simultaneously detecting a scheduling request SR on a scheduling request SR resource; when the ACK information is not received and the scheduling request SR sent by the UE is detected, continuing the RRC connection establishment to complete the connection; the base station performs the steps of:
S5-1: if the base station does not receive the ACK information, further detecting a scheduling request SR sent by the user terminal UE;
S5-2: if the base station detects a scheduling request SR, transmitting downlink control information DCI 0-0 for uplink scheduling;
s5-3: a user terminal (UE) receives DCI 0-0 and sends uplink data;
s5-4: the MAC of the base station side multimedia access control layer receives a first uplink data uplink dedicated control channel (UL-DCCH) and confirms that the configuration of the PUCCH-Config is effective if the CRC passes;
s5-5: the RRC at the base station side receives RRCSetupComplete information, and the RRC is established successfully;
A user terminal UE, configured to receive a radio resource control setup RRCSetup message sent by a base station; feeding back ACK and SR information to the base station; and sending uplink data based on the uplink scheduling requirement of the base station.
7. The system for completing RRC connection establishment in 5G NR according to claim 6, wherein PUCCH-Config is considered valid when the base station receives an ACK fed back by the UE; the base station further detects the SR and sends DCI 0-0 for uplink scheduling; the UE receives DCI 0-0 and sends uplink data; the base station successfully receives RRCSetupComplete message and the RRC establishment is successful.
8. The system for completing RRC connection establishment in 5G NR according to claim 6, wherein if the base station does not receive ACK information and detects a scheduling request SR sent by the user equipment UE, the base station sends downlink control information DCI 0-0 for uplink scheduling; a user terminal (UE) receives DCI 0-0 and sends uplink data; the MAC of the base station side receives the first uplink data uplink dedicated control channel (UL-DCCH) and confirms that the configuration of the PUCCH-Config is effective if the CRC passes; the RRC at the base station side receives RRCSetupComplete information, and the RRC is established successfully.
9. An electronic device, comprising:
a memory for storing a computer program;
A processor for executing a computer program stored in a memory, and when the computer program is executed, implementing the method of completing RRC connection establishment in a 5G NR according to any of claims 1-5.
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