CN113727466A - Method and system for completing RRC (radio resource control) connection establishment in 5G NR (noise reduction) - Google Patents

Method and system for completing RRC (radio resource control) connection establishment in 5G NR (noise reduction) Download PDF

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Publication number
CN113727466A
CN113727466A CN202111074550.4A CN202111074550A CN113727466A CN 113727466 A CN113727466 A CN 113727466A CN 202111074550 A CN202111074550 A CN 202111074550A CN 113727466 A CN113727466 A CN 113727466A
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base station
pucch
resource
rrc
information
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CN113727466B (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 has recorded RRC connection establishment method and system in a 5G NR, send down RRCSetup message through the base transceiver station, dispose physical uplink control channel resource configuration information PUCCH-Config in the message; a user terminal UE receives an RRCSetup message; the base station detects ACK on a physical uplink control channel public resource PUCCH-ResourceCommon and simultaneously detects a scheduling request SR on a scheduling request SR resource; the base station detects whether ACK information fed back by the UE is received; and 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 establish the connection of the radio resource control RRC to complete the connection. Meanwhile, a system for establishing RRC connection in the 5G NR is also provided, and comprises a base station and a user terminal, wherein when the base station does not receive ACK information and detects Scheduling Request (SR) information sent by User Equipment (UE), the base station continues to establish RRC connection, so that the effect of successfully completing the establishment of the RRC connection without depending on the ACK information fed back by the UE is achieved, and the probability of successful establishment of the RRC connection is improved.

Description

Method and system for completing RRC (radio resource control) connection establishment in 5G NR (noise reduction)
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and a system for completing Radio Resource Control (RRC) connection establishment in a 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 connected to the mobile network, and new services and applications emerge endlessly. The explosion of mobile data traffic will present a serious challenge to the network. To meet the increasing demand of mobile traffic, a fifth Generation (5th Generation, 5G) mobile communication network has been developed. The data transmission rate of the 5G network is faster than the wired internet, 100 times faster than the previous 4G LTE cellular network, and has a lower network delay.
In the NR communication system, before communication is performed between the base station and the user terminal UE, the base station and the user terminal UE need to complete connection establishment, i.e. RRC connection establishment, first. Radio Resource Control (RRC) performs Radio Resource management, Control and scheduling through a certain strategy and means, and makes full use of limited Radio network resources as much as possible under the condition of meeting the requirement of service quality, thereby ensuring that the Radio Resource Control (RRC) reaches a planned coverage area and improving service capacity and Resource utilization rate as much as possible. After the RRC connection setup is completed, 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 ACK information fed back by the UE is detected, and the UE is confirmed to successfully receive the RRCSetup information; and then the base station detects the SR information sent by the UE, issues DCI 0-0 to schedule uplink, and completes the establishment of RRC connection. In the RRCSetup message sent by the base station to the UE, a dedicated PUCCH resource of the physical uplink control channel resource configuration information PUCCH-Config is typically configured. The PUCCH-ResourceCommon is used for UE feedback ACK/NACK before the UE is not configured with PUCCH-Config. Once the UE has acquired 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 the PUCCH-Config and the base station still detects ACK on the PUCCH-ResourceCommon, the base station cannot receive ACK information according to the conventional method, and the RRC connection establishment cannot be completed, resulting in a failure in UE access.
And, the 5G NR protocol stack does not explicitly indicate the RRC message configured with PUCCH-Config, and whether the corresponding ACK/NACK feedback is by dedicated PUCCH-Config or common PUCCH-ResourceCommon. Therefore, when the dedicated PUCCH-Config takes effect depends on the UE implementation. However, the base station cannot know whether the ACK feedback of the RRCSetup message uses the common PUCCH resource or the dedicated PUCCH resource. Therefore, when the ACK information is not detected, the base station cannot perform the next RRC connection establishment.
Therefore, it is desirable to provide a method and a system for RRC connection establishment capable of smoothly completing the subsequent procedure without depending on ACK information fed back by the UE to solve the above problems.
Interpretation of terms:
NR New Radio, New air interface.
And ACK: acknowledgement Character, confirm Character. In data communication, the receiving end sends a transmission control character to the sending end, which indicates that the sent data is confirmed to be received without errors.
And SR, scheduling Request.
DCI: downlink Control Information, is carried by a Downlink physical Control channel, and the Downlink Control Information sent to the UE by the base station 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 the uplink direction.
PUCCH: physical Uplink Control Channel, which is used for the terminal to send information related to Uplink scheduling, such as scheduling request sr (scheduling request), ACK/NACK feedback, and Channel Status 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 can detect an SR sent by a UE without relying on ACK/NACK information fed back by the UE for an RRC message, thereby completing RRC connection establishment and taking effect of dedicated PUCCH resources. The method is also suitable for completing the connection reconfiguration process when the dedicated PUCCH resources are configured in the RRC reconfiguration RRCReconfig message.
The above method for completing RRC connection establishment in 5G NR includes the following steps:
s1, the base station sends down a radio resource control to establish RRCSetup message, and the message is configured with physical uplink control channel resource configuration information PUCCH-Config;
s2, user terminal UE receives radio resource control establishment RRCSetup message;
s3, the base station detects ACK on the common resource pucch-ResourceCommon of the physical uplink control channel, and simultaneously detects the scheduling request SR on the scheduling request SR resource;
s4: the base station detects whether ACK information fed back by the UE is received;
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 the connection.
Optionally, step S4 is followed by the following steps:
s4-1: and if the base station detects that the UE feeds back the ACK information, confirming that the physical uplink control channel resource configuration information PUCCH-Config is effective, and continuing to establish the radio resource control RRC connection to complete the connection.
Optionally, 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 physical uplink control channel resource configuration information PUCCH-Config configuration is effective;
s4-12, if the base station further detects the scheduling request SR, the base station sends the downlink control information DCI 0-0 for uplink scheduling;
s4-13, the user terminal UE receives the downlink control information DCI 0-0 and sends the uplink data;
s4-14, 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, step S5 specifically includes the following steps:
s5-1: if the base station does not receive the ACK information, the scheduling request SR sent by the user terminal UE is further detected;
s5-2: if the base station detects a scheduling request SR, sending downlink control information DCI 0-0 for uplink scheduling;
s5-3, the user terminal UE receives the downlink control information DCI 0-0 and sends the uplink data;
s5-4, if the MAC receives the UL-DCCH and the CRC passes, it confirms that the PUCCH-Config configuration takes effect;
s5-5, the base station side radio resource control RRC receives the message of completing the establishment of the radio resource control RRCSetupcomplete, and the establishment of the radio resource control RRC is successful.
Optionally, 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 0PUCCH Resource SET0, physical uplink control channel Resource SET 1PUCCH Resource SET 1.
Optionally, the uplink control information UCI of the physical uplink control channel Resource SET 0PUCCH Resource SET0 is less than 2 bits, and the uplink control information UCI of the physical uplink control channel Resource SET 1PUCCH Resource SET1 is greater than 2 bits.
In addition, the present invention also provides a system for completing RRC connection establishment in 5G NR, comprising:
the base station is used for sending a radio resource control (RRCSetup) establishing message to the UE, and the message is configured with physical uplink control channel resource configuration information PUCCH-Config; detecting ACK on a physical uplink control channel public 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, the RRC connection establishment is continued to complete the connection;
the user equipment UE is used for receiving a radio resource control establishment RRCSetup message sent by the 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 valid; the base station further detects the SR and sends DCI 0-0 for uplink scheduling; UE receives DCI 0-0 and transmits uplink data; the base station successfully receives the RRCSetupcomplete message, and RRC is successfully established.
Optionally, 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 downlink control information DCI 0-0 for uplink scheduling; a user terminal UE receives downlink control information DCI 0-0 and transmits uplink data; the base station side multimedia access control layer MAC receives a first uplink data uplink dedicated control channel UL-DCCH, and if the cyclic redundancy check code CRC passes, the physical uplink control channel resource configuration information PUCCH-Config configuration is confirmed to be effective; and the base station side radio resource control RRC receives the message of completing the establishment of the radio resource control RRCSetupcomplete, and the establishment of the radio resource control RRC is successful.
In addition, the present invention also provides an electronic device including:
a memory for storing a computer program;
and a processor for executing the computer program stored in the memory, wherein when the computer program is executed, the method for completing the RRC connection establishment in the 5G NR is implemented.
The invention has the advantages and beneficial effects that:
compared with the prior art that the RRC connection establishment can be successfully completed only by depending on the ACK information fed back by the UE, the invention provides a method and a system for completing the RRC connection establishment of the radio Resource control in the 5G NR, and the base station configures PUCCH-Config in the RRCSetup message for SR, CSI, PUCCH Resource SET0 and PUCCH Resource SET1, so that not only the ACK is detected on the public Resource PUCCH-ResourceCommon, but also the SR is detected on the SR Resource, thereby achieving the effect of successfully completing the RRC connection establishment process without depending on the ACK information fed back by the UE, and improving the communication efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only part of the descriptions of some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 schematically shows a general flow diagram of a method for completing RRC connection establishment in 5G NR in an embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to 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.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a method, system, apparatus, device, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely 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 RRC connection is established, the base station not only detects ACK on the PUCCH-ResourceCommon, but also detects SR on the SR resource, and even if the base station does not detect ACK on the PUCCH-ResourceCommon, the RRC connection can be continuously established as long as the SR is detected on the SR resource, thereby greatly improving the success rate of the RRC connection establishment.
In this embodiment, a method for completing RRC connection establishment in 5G NR is provided, which includes the following steps:
s1, the base station sends down RRCSetup message, PUCCH-Config is configured in the message;
s2, the user terminal UE receives RRCSetup message;
s3, the base station detects ACK on PUCCH-ResourceCommon and detects SR on SR resources at the same time;
s4: the base station detects whether ACK information fed back by the UE is received;
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 establish the RRC connection to complete the connection.
The Physical Uplink Control Channel-configuration (PUCCH-Resource) information includes at most 32 PUCCH-resources, and the PUCCH-resources indicate information such as PUCCH format information, a starting RB (Resource Block) position, and whether to perform frequency hopping indication.
A PUCCH-resource common (Physical Uplink Control Channel-resource common resource) is mainly used for feeding back HARQ-ACK.
Preferably, the following process is further included after step S4:
s4-1: and if the base station detects that the user terminal UE feeds back the ACK information, confirming that the PUCCH-Config takes effect, and continuing to establish the RRC connection to complete the connection.
Preferably, 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 the SR, the base station sends DCI 0-0 for uplink scheduling;
s4-13, the user terminal UE receives DCI 0-0 and sends uplink data;
s4-14, the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
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 steps:
s5-1: if the base station does not receive the ACK information, further detecting an SR sent by the user terminal UE;
s5-2: if the base station detects the SR, the DCI 0-0 is sent for uplink scheduling;
s5-3, the user terminal UE receives DCI 0-0 and sends uplink data;
s5-4, the MAC (media Access Control) layer at the base station side receives the first uplink data UL-DCCH, and if the CRC passes, the PUCCH-Config configuration is confirmed to be effective;
s5-5, the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
The CRC (Cyclic Redundancy Check) is a Cyclic code and is a Check code having error detection and correction capabilities. Cyclic redundancy checks establish a convention between data bits and check bits through some mathematical operation.
Preferably, the PUCCH-Config is for SR, CSI, PUCCH Resource SET0, PUCCH Resource SET 1.
The CSI (Channel State Information) is a Channel attribute of a communication link, and can make a communication system adapt to a current Channel condition, thereby providing a guarantee for high-reliability and high-rate communication in a multi-antenna system.
PUCCH Resource SET0(Physical Uplink Control Channel SET0, Physical Uplink Control Channel Resource SET 0), PUCCH Resource SET1(Physical Uplink Control Channel SET1, Physical Uplink Control Channel Resource SET 1) is used to configure dedicated Resource PUCCH-Config. At most 4 PUCCH Resource sets are configured in the PUCCH-Config, and each Set comprises a plurality of PUCCH resources.
Preferably, UCI of the PUCCH Resource SET0 is 2 bits, and UCI of the PUCCH Resource SET1 is 2 bits.
Among them, UCI (Uplink Control Information) may be transmitted in PUCCH or PUSCH.
In an embodiment, a method for completing RRC connection establishment in 5G NR provided by the present invention includes the following specific steps:
s1, the base station sends down RRCSetup message, PUCCH-Config is configured in the message and is used for scheduling request SR, channel state information CSI, physical uplink control channel Resource SET 0PUCCH Resource SET0, physical uplink control channel Resource SET 1PUCCH Resource SET 1;
preferably, UCI of the PUCCH Resource SET0 is ═ 2bit, and UCI of the PUCCH Resource SET1 is >2 bit.
S2, the user terminal UE receives RRCSetup message;
s3, the base station detects ACK on PUCCH-ResourceCommon and detects SR on SR resources at the same time;
s4: the base station detects whether ACK information fed back by the UE is received;
s4-1: and if the base station detects that the user terminal UE feeds back the ACK information, confirming that the PUCCH-Config takes effect, 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, the user terminal UE receives the downlink control information DCI 0-0 and sends the uplink data;
s4-14, 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.
S5, if the ACK information is not received, and the scheduling request SR information sent by the user terminal UE is detected;
s5-2: the base station sends DCI 0-0 for uplink scheduling;
s5-3, the user terminal UE receives DCI 0-0 and sends uplink data;
s5-4, the MAC (media Access Control) layer at the base station side receives the first uplink data UL-DCCH, and if the CRC passes, the PUCCH-Config configuration is confirmed to be effective;
s5-5, the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
In addition, in an embodiment, the present invention further provides a system for completing RRC connection establishment in 5G NR, including:
the base station is used for issuing an RRCSetup message to the User Equipment (UE), and the PUCCH-Config is configured in the message; detecting ACK on PUCCH-ResourceCommon, and simultaneously detecting SR on SR resources; when the ACK information is not received and the SR sent by the UE is detected, the RRC connection establishment is continued to complete the connection;
the user equipment UE is used for receiving the RRCSetup message sent by the 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 equipment UE, the PUCCH-Config is considered to be valid; the base station further detects the SR and sends DCI 0-0 for uplink scheduling; UE receives DCI 0-0 and transmits uplink data; the base station successfully receives the RRCSetupcomplete message, and RRC is successfully established.
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; the user terminal UE receives the DCI 0-0 and transmits uplink data; the MAC on the base station side receives the first uplink data UL-DCCH, and if the CRC passes, the PUCCH-Config configuration is confirmed to be effective; and the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
Specifically, the system for completing establishment of RRC connection in 5G NR provided by the present invention specifically operates as follows:
s1, the base station sends down RRCSetup message, PUCCH-Config is configured in the message and is used for scheduling request SR, channel state information CSI, physical uplink control channel Resource SET 0PUCCH Resource SET0, physical uplink control channel Resource SET 1PUCCH Resource SET 1;
preferably, UCI of the PUCCH Resource SET0 is ═ 2bit, and UCI of the PUCCH Resource SET1 is >2 bit.
S2, the user terminal UE receives RRCSetup message;
s3, the base station detects ACK on PUCCH-ResourceCommon and detects SR on SR resources at the same time;
s4: the base station detects whether ACK information fed back by the UE is received;
s4-1: and if the base station detects that the user terminal UE feeds back the ACK information, confirming that the PUCCH-Config takes effect, 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, the user terminal UE receives the downlink control information DCI 0-0 and sends the uplink data;
s4-14, 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.
S5, if the ACK information is not received, and the scheduling request SR information sent by the user terminal UE is detected;
s5-2: the base station sends DCI 0-0 for uplink scheduling;
s5-3, the user terminal UE receives DCI 0-0 and sends uplink data;
s5-4, the MAC (media Access Control) layer at the base station side receives the first uplink data UL-DCCH, and if the CRC passes, the PUCCH-Config configuration is confirmed to be effective;
s5-5, the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
Furthermore, in an embodiment, the present invention also provides an electronic device, including:
a memory for a computer program;
and a processor configured to execute the computer program stored in the storage, and when the computer program is executed, the method for completing establishment of Radio Resource Control (RRC) connection in 5G NR is implemented.
The electronic device of this embodiment may be an integrated circuit board, a PC (Personal Computer), or a portable Computer 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 executing a computer program stored in the memory, and in particular, the processor may execute the computer program stored in the memory, and when the computer program is executed, at least the following instructions are executed:
s1, the base station sends down RRCSetup message, PUCCH-Config is configured in the message;
s2, the user terminal UE receives RRCSetup message;
s3, the base station detects ACK on PUCCH-ResourceCommon and detects SR on SR resources at the same time;
s4: the base station detects whether ACK information fed back by the UE is received;
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 establish the RRC connection to complete the connection.
Further, while operations of the methods of the present invention are described in the embodiments in a particular order, this does not require or imply that the operations must be performed in that particular order, or that all illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
While the spirit and principles of the invention have been described with reference to the above specific embodiments, it is to be understood that the invention is not limited to the specific embodiments disclosed, nor is the division of the aspects, which is for convenience only as the features in these aspects cannot be combined to advantage. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. A method for completing RRC connection establishment in a 5G NR, comprising:
s1, the base station sends down a radio resource control to establish RRCSetup message, and the message is configured with physical uplink control channel resource configuration information PUCCH-Config;
s2, user terminal UE receives radio resource control establishment RRCSetup message;
s3, the base station detects ACK information on the common resource pucch-ResourceCommon of the physical uplink control channel, and detects a scheduling request SR on the resource of the scheduling request SR;
s4: the base station detects whether ACK information fed back by the UE is received;
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 the connection.
2. The method of claim 1, wherein the step S4 is followed by the following steps:
s4-1: and if the base station detects that the UE feeds back the ACK information, confirming that the PUCCH-Config takes effect, and continuing to establish the RRC connection to complete the connection.
3. The method according to claim 2, wherein 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 PUCCH-Config configuration is effective;
s4-12, if the base station further detects the scheduling request SR, the base station sends the downlink control information DCI 0-0 for uplink scheduling;
s4-13, the user terminal UE receives DCI 0-0 and sends uplink data;
s4-14, the RRC at the base station side receives the RRCSetupcomplete message of the RRC establishment, and the RRC establishment is successful.
4. The method according to claim 1, wherein the step S5 specifically includes the following steps:
s5-1: if the base station does not receive the ACK information, the scheduling request SR sent by the user terminal UE is further detected;
s5-2: if the base station detects a scheduling request SR, sending downlink control information DCI 0-0 for uplink scheduling;
s5-3, the user terminal UE receives DCI 0-0 and sends uplink data;
s5-4, the base station side multimedia access control layer MAC receives the first uplink data uplink dedicated control channel UL-DCCH, and if the cyclic redundancy check code CRC passes, the PUCCH-Config configuration is confirmed to be effective;
s5-5, the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
5. The method of claim 1, wherein the PUCCH-Config is used for scheduling request SR, channel state information CSI, PUCCH Resource SET 0PUCCH Resource SET0, physical uplink control channel Resource SET 1PUCCH Resource SET 1.
6. The method of claim 5 in the 5G NR for completing RRC connection setup, wherein uplink control information UCI of the PUCCH Resource SET0 is 2 bits, and uplink control information UCI of the PUCCH Resource SET1 is >2 bits.
7. A system for completing RRC connection establishment in a 5G NR, comprising:
the base station is used for sending a radio resource control (RRCSetup) establishing message to the UE, and the message is configured with special physical uplink control channel resource configuration information PUCCH-Config; 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, the RRC connection establishment is continued to complete the connection;
the user equipment UE is used for receiving a radio resource control establishment RRCSetup message sent by the 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.
8. The system of claim 7, wherein the base station considers the PUCCH-Config to be valid when receiving ACK fed back from the UE; the base station further detects the SR and sends DCI 0-0 for uplink scheduling; UE receives DCI 0-0 and transmits uplink data; the base station successfully receives the RRCSetupcomplete message, and RRC is successfully established.
9. The system according to claim 7, wherein if the base station does not receive ACK information and detects a scheduling request SR sent by a user equipment UE, the base station sends downlink control information DCI 0-0 for uplink scheduling; the user terminal UE receives the DCI 0-0 and transmits uplink data; the base station side media access control layer MAC receives a first uplink data uplink dedicated control channel UL-DCCH, and if the cyclic redundancy check code CRC passes, the PUCCH-Config configuration is confirmed to be effective; and the RRC at the base station side receives the RRCSetupcomplete message, and the RRC is successfully established.
10. An electronic device, comprising:
a memory for storing a computer program;
a processor for executing a computer program stored in the memory, and when the computer program is executed, implementing the method of completing RRC connection establishment in a 5G NR according to any one of claims 1 to 6.
CN202111074550.4A 2021-09-14 Method and system for completing RRC connection establishment in 5G NR Active CN113727466B (en)

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