CN110475304B

CN110475304B - Radio resource control connection method and device

Info

Publication number: CN110475304B
Application number: CN201910615748.5A
Authority: CN
Inventors: 庞高昆; 华军喜; 金乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2021-10-26
Anticipated expiration: 2039-07-09
Also published as: CN110475304A

Abstract

A radio resource control connection method and device are used for solving the problem that no relevant mechanism is available to process RRC establishment failure in an uplink and downlink decoupling scene. The method comprises the following steps: the method comprises the steps that user equipment receives a first message sent by network equipment, wherein the first message is used for indicating the RRC connection establishment failure of the user equipment; the user equipment reestablishes the RRC connection based on the first timer and/or the second timer, wherein the first timer indicates that the supplemental uplink is not allowed to be used if the first timer is in an active period, the supplemental uplink is allowed to be used if the first timer is in an inactive period, the non-supplemental uplink is not allowed to be used if the second timer is in an active period, and the non-supplemental uplink is allowed to be used if the second timer is in an inactive period.

Description

Radio resource control connection method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for radio resource control connection.

Background

Currently, in a Long Term Evolution (LTE) network, a cell generally has an uplink and a downlink, where the uplink and the downlink use the same frequency band, but the uplink coverage is usually very limited due to limited terminal transmission power.

The 5G NR standard proposes uplink and downlink decoupling, which is characterized by having two uplinks and a downlink for a cell, where the two uplinks include a Supplemental Uplink (SUL) and a non-supplemental uplink (NUL), where the SUL uses a lower frequency and the NUL uses a higher frequency.

When a terminal device accesses a base station, a Radio Resource Control (RRC) establishment failure may occur continuously. In the LTE network, the terminal device may choose to access another cell or abandon establishment after continuous RRC establishment fails, but in an uplink and downlink decoupling scenario, there is no relevant mechanism to handle the RRC establishment failure.

Disclosure of Invention

The application provides a radio resource control connection method and device, which are used for solving the problem that no relevant mechanism is available to process RRC establishment failure in an uplink and downlink decoupling scene.

In a first aspect, a method for radio resource control connection provided in an embodiment of the present application includes: the method comprises the steps that user equipment receives a first message sent by network equipment, wherein the first message is used for indicating the RRC connection establishment failure of the user equipment; the user equipment reestablishes the RRC connection based on the first timer and/or the second timer, wherein the first timer indicates that the supplemental uplink is not allowed to be used if the first timer is in an active period, the supplemental uplink is allowed to be used if the first timer is in an inactive period, the non-supplemental uplink is not allowed to be used if the second timer is in an active period, and the non-supplemental uplink is allowed to be used if the second timer is in an inactive period. In the embodiment of the application, the user equipment maintains the two timers, so that the channel quality of the supplementary uplink and the non-supplementary uplink can be judged according to the states of the two timers after the RRC is failed to be established, and the uplink is determined to be used for reestablishing the RRC connection.

In one possible design, when the user equipment re-establishes the RRC connection based on the first timer and/or the second timer, if the second timer is in an active period and the first timer is in an inactive period, the user equipment may re-establish the RRC connection using the supplemental uplink. In the above design, the state of the second timer may indicate whether the non-supplemental uplink of the user equipment is suitable for establishing the RRC connection, and the second timer may be activated when the non-supplemental uplink is not suitable for establishing the RRC connection, so that the user equipment selects the supplemental uplink to establish the RRC connection when the non-supplemental uplink is not allowed to be used.

In one possible design, the user equipment may measure the downlink signal quality value before the user equipment re-establishes the RRC connection based on the first timer and/or the second timer. Therefore, when the user equipment reestablishes the RRC connection based on the first timer and/or the second timer, if the first timer is in an active period, the second timer is in an inactive period, and the downlink signal quality value is greater than or equal to the first threshold, the user equipment may reestablish the RRC connection using the non-supplemental uplink. In the above design, the supplemental uplink is not allowed to be used, and when the downlink signal quality value is greater than or equal to the first threshold, it may indicate that the channel status of the non-supplemental uplink is relatively good, so that the user equipment may select the non-supplemental uplink to establish the RRC connection.

In one possible design, when the ue reestablishes the RRC connection based on the first timer and/or the second timer, if both the first timer and the second timer are in the active period, the ue may choose to reestablish the RRC connection using the uplink of the neighboring cell. In the above design, when both the first timer and the second timer are in the activation period, it may be indicated that the channel quality of the supplemental uplink and the channel quality of the non-supplemental uplink are not good enough, so that the user equipment selects another cell for access, which may improve the accuracy of access, thereby improving the user experience.

In one possible design, the downlink signal quality value may be measured before the user equipment re-establishes the RRC connection based on the first timer and/or the second timer. Therefore, when the user equipment reestablishes the RRC connection based on the first timer and/or the second timer, if the first timer and the second timer are both in the inactive period and the downlink signal quality value is smaller than the first threshold, the user equipment may reestablish the RRC connection using the supplemental uplink. If the first timer and the second timer are both in the inactive period and the downlink signal quality value is greater than or equal to the first threshold, the ue may reestablish the RRC connection using the non-supplemental uplink. In the above design, the channel quality of the non-supplemental uplink is characterized by the downlink signal quality value, so that the user equipment can determine which uplink to select for establishing the RRC connection according to the channel quality of the non-supplemental uplink.

In one possible design, the ue may activate the first timer if the ue fails to establish the RRC connection N consecutive times on the supplemental uplink, where N is an integer greater than 0. In the design, the RRC connection is continuously established for N times on the supplementary uplink and fails, which indicates that the channel quality of the supplementary uplink is not good enough, and the first timer is activated, so that the user equipment does not need to repeatedly establish the RRC connection on the supplementary uplink when the RRC connection fails, the random access efficiency and accuracy are improved, and the user experience is improved.

In one possible design, the ue may activate the second timer if the ue fails to establish the RRC connection M consecutive times on the non-supplemental uplink, where M is an integer greater than 0. In the above design, the RRC connection is failed to be established on the non-supplemental uplink M times, which indicates that the channel quality of the non-supplemental uplink is not good enough, and the second timer is activated, so that the user equipment does not need to repeatedly establish the RRC connection on the non-supplemental uplink when the RRC establishment fails, thereby improving the efficiency and accuracy of random access, and further improving the user experience.

In one possible design, the user equipment may activate a second timer if a transmit power of the user equipment on the non-supplemental uplink reaches a second threshold. In the above design, when the transmit power of the ue on the non-supplemental uplink reaches the second threshold, it indicates that the channel state of the non-supplemental uplink is not good enough, and by activating the second timer, the ue does not need to repeatedly establish RRC connection on the non-supplemental uplink when RRC establishment fails, so that the efficiency and accuracy of random access are improved, and user experience is improved.

In one possible design, the user equipment may activate the first timer and the second timer if a sum of a first number and a second number is greater than a third threshold, where the first number is a number of times that the user equipment fails to establish the RRC connection on the supplemental uplink, and the second number is a number of times that the user equipment fails to establish the RRC connection on the non-supplemental uplink. In the above design, when the total number of times of RRC connection establishment failures of the ue on the non-supplemental uplink and the supplemental uplink is too many, it indicates that the ue does not have a coverage area of the cell, or the ue is in an edge area of the coverage area of the cell, and by activating the first timer and the second timer, the ue does not need to repeatedly establish an RRC connection on the uplink of the cell when the RRC establishment fails, but selects another cell to establish an RRC connection, thereby improving the efficiency and accuracy of random access, and further improving user experience.

In a second aspect, a method for radio resource control connection provided in an embodiment of the present application includes: the method comprises the steps that user equipment receives a first message sent by network equipment, wherein the first message is used for indicating that the user equipment Radio Resource Control (RRC) fails to be established on a first uplink, the first message carries first information, and the first information is a waiting duration or a failure reason, wherein the first uplink is a supplementary uplink or a non-supplementary uplink; the user equipment reestablishes the RRC connection based on the first information. In the embodiment of the application, the network device informs the user equipment of a waiting time or a failure reason after the RRC connection is failed to be established, so that the user equipment can determine which uplink is used for reestablishing the RRC connection according to the waiting time or the failure reason.

In one possible design, the first information may be a waiting duration, and when the ue reestablishes the RRC connection based on the first information, if the waiting duration is equal to 0, the ue may reestablish the RRC connection using the first uplink; if the waiting time is longer than 0, the user equipment uses a second uplink to reestablish RRC connection, wherein if the first uplink is a supplementary uplink, the second uplink is a non-supplementary uplink; alternatively, if the first uplink is a non-supplemental uplink, the second uplink is a supplemental uplink. In the above design, by judging the value of the wait time, if the wait time is not 0, the SUL is directly used to initiate the RRC connection after the RRC connection is failed to be established on the NUL, so that the NUL and the SUL are alternately used, and the accuracy of establishing the RRC connection between the user equipment and the network equipment is improved.

In one possible design, after the user equipment reestablishes the RRC connection using the second uplink, the user equipment may receive a second message sent by the network equipment, the second message indicating that the user equipment RRC connection failed to be established on the second uplink. And after the waiting time length is overtime, the user equipment uses the first uplink to reestablish RRC connection. In the design, by judging the value of the wait time, if the wait time is not 0, the SUL is directly used for initiating RRC connection after the RRC connection established on the NUL fails; and after the wait time is overtime, the NUL is used for establishing RRC connection, so that the NUL and the SUL are alternately used, and the accuracy of establishing RRC connection between the user equipment and the network equipment is improved.

In one possible design, the user equipment may determine that a number of failures to establish the RRC connection on the first uplink is not greater than a first threshold before the user equipment reestablishes the RRC connection using the first uplink. The user equipment may determine that a number of times the RRC connection was failed to be established on the second uplink is not greater than a first threshold before the user equipment reestablishes the RRC connection using the second uplink. In the above design, when the number of times of RRC connection establishment failures on the supplemental uplink and the non-supplemental uplink is too large, the user equipment may avoid using the corresponding uplink to establish the RRC connection, so that the accuracy of establishing the RRC connection between the user equipment and the network device may be improved.

In one possible design, if the number of times of failure to establish the RRC connection on the first uplink is greater than a first threshold and the number of times of failure to establish the RRC connection on the second uplink is greater than a second threshold, the user equipment reestablishes the RRC connection using the uplink of the neighboring cell. In the above design, when the number of times of RRC connection establishment failures on the supplemental uplink and the non-supplemental uplink is too many, the ue may avoid using the cell to establish the RRC connection, and directly select another cell to establish the RRC connection, so that the accuracy of establishing the RRC connection between the ue and the network device may be improved.

In one possible design, the first message is a failure cause. When the user equipment reestablishes the RRC connection based on the first information, if the failure reason is that the distance between the user equipment and the network equipment exceeds a threshold value, or the failure reason is that the network equipment fails to decode, the user equipment reestablishes the RRC connection by using a second uplink, wherein if the first uplink is a supplementary uplink, the second uplink is a non-supplementary uplink; alternatively, if the first uplink is a non-supplemental uplink, the second uplink is a supplemental uplink. Through the design, after the user equipment knows that the specific reason of the RRC establishment failure is that the distance between the user equipment and the network equipment exceeds the threshold value or the network equipment fails to decode, the user equipment can determine that the user equipment is not in the coverage range of the non-supplementary uplink, so that the user equipment can select the supplementary uplink to establish the RRC connection, the user equipment can avoid repeatedly establishing the RRC connection on the non-supplementary uplink for many times, and the efficiency and the accuracy of establishing the RRC connection can be improved.

In one possible design, the first message is a failure cause. When the user equipment reestablishes the RRC connection based on the first information, if the failure reason is that the network equipment is overloaded, the user equipment may switch to another network equipment to reestablish the RRC connection. Through the design, the user equipment can select other network equipment to establish the RRC connection after knowing that the specific reason of the RRC establishment failure is network equipment overload, so that the RRC connection can be prevented from being established with the network equipment repeatedly, and the efficiency and the accuracy of establishing the RRC connection can be improved.

In a third aspect, the present application provides a radio resource control connection apparatus, which may be a user equipment, or may be a chip or a chipset in the user equipment. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a user equipment, the processing unit may be a processor, and the transceiving unit may be a communication interface; the apparatus may further include a storage unit, which may be a memory; the storage unit is used for storing instructions, and the processing unit executes the instructions stored in the storage unit so as to enable a user to execute corresponding functions in the first aspect and the second aspect. When the apparatus is a chip or chipset within a user equipment, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit to enable the user equipment to execute the first aspect and the second aspect. The memory unit may be a memory unit (e.g., register, cache, etc.) within the chip or chipset, or a memory unit (e.g., read only memory, random access memory, etc.) external to the chip or chipset within the communication device.

In a fourth aspect, the present application also provides a computer-readable storage medium including instructions which, when executed on a computer, cause the computer to perform the method of the above aspects.

In a fifth aspect, the present application also provides a computer program product comprising instructions which, when executed, cause the method of the above aspects to be performed.

In a sixth aspect, the present application provides a chip comprising a processor and a communication interface for receiving code instructions and transmitting them to the processor. The processor is used for calling the code instructions transmitted by the communication interface to execute the method of the aspects.

Drawings

Fig. 1 is a schematic diagram of uplink and downlink decoupling provided in the present application;

fig. 2 is a schematic structural diagram of a communication system provided in the present application;

fig. 3 is a schematic structural diagram of a user equipment provided in the present application;

fig. 4 is a schematic structural diagram of a network device provided in the present application;

fig. 5 is a flowchart illustrating an RRC connection method according to the present application;

FIG. 6 is a schematic diagram of SUL coverage and NUL coverage provided herein;

fig. 7A is a diagram illustrating RRC connection establishment according to the present application;

fig. 7B is a diagram illustrating another RRC connection establishment provided herein;

fig. 8 is a flowchart illustrating an RRC connection method based on waiting duration according to the present application;

fig. 9 is a schematic diagram of an RRC connection based on a waiting duration according to the present application;

fig. 10 is a flowchart illustrating an RRC connection method based on a failure cause according to the present application;

fig. 11A is a schematic diagram of an RRC connection based on a failure cause according to the present application;

fig. 11B is a diagram illustrating another RRC connection based on a failure cause according to the present application;

fig. 12 is a schematic structural diagram of a user equipment provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

If the low-latency service is not well handled, it not only brings a bad user experience to the client, but also causes an economic loss to the client, which is not acceptable. For example, for a trading company in an electronic trading market, if the processing time (including latency) of its trading system is 5ms (milliseconds) slower than the competing partner, it will lose 1% of its profit, and if it is 10ms slower, the loss is extended to 10%. A terminal device accessing a network device needs to establish Radio Resource Control (RRC) connection with the network device, and if the RRC connection fails, a large time delay is certainly caused, and user experience is deteriorated.

Because the uplink coverage of a New Radio (NR) is very limited due to limited terminal transmit power, sometimes the uplink coverage of a terminal in an NR scenario is only about half of the downlink coverage of a base station, the 5G NR standard proposes uplink and downlink decoupling, where the uplink and downlink decoupling is decoupling for a relationship between frequency spectrums used by NR uplink and downlink, and the uplink and downlink decoupling is characterized by having two uplinks and a downlink for one cell, where the two uplinks include a Supplemental Uplink (SUL) and a non-supplemental uplink (non-SUL, NUL), where the SUL uses a lower frequency and the NUL uses a higher frequency. The frequency of the SUL is less than that of the NUL, and since the SUL has a lower frequency and less attenuation than the NUL, signals are transmitted at the same power and the signals are transmitted farther apart using the SUL than they are transmitted using the NUL, it can also be understood that the coverage area using the SUL is larger than that using the NUL. As shown in fig. 1, the area 1 is the coverage area of the SUL, such as: 1.8GHz to solve or improve the problem of uplink coverage limitation, the terminal device located in the area 1 may use the SUL to access the base station. The area 2 is the range covered by the NUL, and the terminal equipment located in the area 2 can access the base station by the NUL. In the NR, the SUL (such as a low frequency band) can be utilized to solve the problem of insufficient uplink coverage of the non-SUL (high frequency band), which is beneficial to providing continuous coverage and enhancing mobile experience.

Where the NUL and the downlink (NR DL) may use the same frequency band (e.g., Time Division Duplex (TDD)) or form a pair of frequency bands (e.g., Frequency Division Duplex (FDD)), the SUL may use the existing LTE low frequency (e.g., 1.8GHz) according to the frequency band combination specified by the standard and the operator's plan.

When a terminal device accesses a base station, a Radio Resource Control (RRC) establishment failure may occur continuously. In the LTE network, the terminal device may choose to access another cell or abandon establishment after continuous RRC establishment fails, but in an uplink and downlink decoupling scenario, there is no relevant mechanism to handle the RRC establishment failure. Based on this, embodiments of the present application provide a method and an apparatus for RRC connection, so as to solve a problem how a terminal device handles RRC establishment failure in an uplink and downlink decoupling scenario, where the method and the apparatus are based on the same technical concept, and because the principles of the method and the apparatus for solving the problem are similar, the apparatus and the method may be implemented by referring to each other, and repeated details are not repeated.

The embodiment of the present application may be applied to various communication systems, for example, Long Term Evolution (LTE), fifth generation (5G) communication systems, Universal Terrestrial Radio Access (UTRA), evolved UTRA (E-UTRAN), new radio technology (NR), and Radio Access Network (RAN) based on NG interface. The communication system and the like which come out in the future communication development can also be a mixed architecture of a plurality of communication systems, such as a mixed architecture of LTE and 5G.

The embodiment of the application can be applied to the following scenes but not limited to: a single robbing scene: red envelope robbing, train ticket robbing, double 11 order robbing, mobile phone robbing money, special price robbing, dripping, beauty group and other businesses; red packet robbing and other services; it may also be a game play scenario: the game needing low time delay, such as chicken game, the royal glory, equipment robbery, and the like; financial and electronic transaction types; AR, VR, etc.

For convenience of description, the embodiments of the present application take an NR system as an example for illustration, and an LTE system is similar. As shown in fig. 2, the NR system may include a Core network device with a new air interface, such as a new radio new radio access technology Core (NR _ new rat-Core), an access network device with a new air interface (where a functional entity is mainly a network device), and a user equipment connected to the network device in the access network device with a new air interface, and further, may further include a relay device and a user equipment connected to the relay. The relay device establishes a connection with the network device through the link 2, and thus, the relay device can also be regarded as a user equipment with respect to the network device; the relay device establishes a connection with the user equipment 2 via the link 3, and thus the relay device can also be considered as a kind of network device with respect to the user equipment. Therefore, those skilled in the art can understand that the network device described in the embodiment of the present application may also include a relay device, and the user equipment described in the embodiment of the present application may also include a relay device.

The network device may specifically be any one or a combination of several of a gNB, a New radio base station (New radio eNB), a transmission point (TRP), a macro base station, a micro base station, a high frequency base station, an LTE macro or micro eNB, a Customer Premise Equipment (CPE), a Wireless Local Area Network (WLAN) Access Point (AP), a WLAN group leader (GO), and the like, for example, the network device may be a gNB, and the gNB completes functions related to the network device in the embodiment of the present application, or the network device may be a combination of a gNB and a TRP, for example, the gNB completes a resource configuration function of the network device in the embodiment of the present application, and the TRP completes a sending and receiving function of the network device in the embodiment of the present application, which is not limited in this application. The user equipment may be a mobile phone, a tablet, a smart car, a sensing device, an internet of things (IoT) device, a CPE, etc., a relay base station, etc.

For another example, the LTE system may include Core network equipment of an LTE air interface, such as a radio access technology Core (RAT-Core), access network equipment of an LTE air interface (where a functional entity is mainly network equipment), and user equipment of network equipment in the access network equipment connected to the LTE air interface, where the network equipment may specifically be any one or a combination of some of an eNB, a New radio base station (New radio eNB), a TRP, a macro base station, a micro base station, a high frequency base station, an LTE macro or micro eNB, a CPE, a WLAN AP, a WLAN GO, and the like, for example, the network equipment may be an eNB, and the eNB completes a function related to the network equipment in the embodiment of the present application, or the network equipment is a combination of the eNB and the TRP, for example, the eNB completes a resource configuration function of the network equipment in the embodiment of the present application, and the TRP completes a sending and receiving function of the network equipment in the embodiment of the present application, the embodiments of the present application are not limited thereto. The user equipment can be a mobile phone, a tablet, an intelligent automobile, sensing equipment, IOT equipment, CPE and the like, a relay base station and the like.

In the embodiment of the present application, the UE 100 may be a 5G UE (UE supporting the next generation mobile communication standard), or other 5G terminal device, or a 4G UE. As illustrated in fig. 3, the user equipment 100 may include: one or more transceivers 101, one or more antennas 104, one or more processors 102, and one or more memories 103.

The network device 200 may be a 5G gbb (base station in a next generation mobile communication network), or a Transmission and Reception Point (TRP), or a network device of another 5G access network (e.g. a micro base station), or a 4G eNB. As illustrated in fig. 4, the network device 200 may include: one or more transceivers 201, one or more antennas 204, one or more processors 202, one or more memories 203, and further, may include one or more other interfaces 205 (e.g., fiber link interfaces, ethernet interfaces, and/or copper wire interfaces, etc.).

The RRC connection method provided by the embodiment of the present application is specifically described below with reference to the user equipment shown in fig. 3 and the network equipment shown in fig. 4.

The first embodiment is as follows:

fig. 5 shows a RRC connection method provided in an embodiment of the present application, where the method specifically includes:

s501, the network device sends a first message to the user device, wherein the first message is used for indicating that the RRC connection establishment of the user device fails. Correspondingly, the user equipment receives a first message sent by the network equipment. Illustratively, the first message may be an RRC reject (reject) message (indicating rejection of the RRC connection of the UE).

And the user equipment may send an RRC connection request (RRC connection request) message to the network equipment before receiving the first message, where the RRC connection request is used to request the network equipment to establish an RRC connection with the user equipment. The network device responds to an RRC reject message if the network device fails to establish an RRC connection.

S502, the ue reestablishes the RRC connection based on the first timer and/or the second timer, wherein the first timer indicates that the supplemental uplink is not allowed to be used if the first timer is in the active period, the supplemental uplink is allowed to be used if the first timer is in the inactive period, the non-supplemental uplink is not allowed to be used if the second timer is in the active period, and the non-supplemental uplink is allowed to be used if the second timer is in the inactive period.

For example, in a 5G scenario, the UE may maintain two timers (i.e., a first Timer and a second Timer, where the first Timer and the second Timer are only an exemplary illustration, the first Timer may also be referred to as a SUL bar Timer, and the second Timer may also be referred to as a NUL bar Timer, and a physical meaning of the Timer is that the UE prohibits to access the NUL or the SUL of the corresponding cell when the two timers are activated, specifically, the UE prohibits to access the SUL of the corresponding cell when the first Timer is activated, and the UE prohibits to access the NUL of the corresponding cell when the second Timer is activated.

For example, the ue may activate the first timer when the RRC connection is failed to be established N consecutive times on the SUL, where N is an integer greater than 0. The ue may also activate a second timer when the RRC connection is failed to be established M consecutive times on the NUL, where M is an integer greater than 0, where N and M may be the same or different. The user equipment may also activate a second timer when the transmit power on the NUL reaches a second threshold, at which point the remaining retransmissions on the NUL may be terminated prematurely. The user equipment activates the first timer and the second timer when a sum of a number of times that the RRC connection can be established on the SUL and a number of times that the RRC connection can be established on the NUL is greater than a third threshold.

In the embodiment of the application, the user equipment maintains the two timers, so that after the RRC is established unsuccessfully, which uplink is used for reestablishing the RRC connection can be determined according to the states of the two timers.

Generally, when the ue randomly accesses the network device, the ue may first measure a DL Reference Signal Received Power (RSRP), and if the DL RSRP is greater than or equal to a first Threshold (in this embodiment, the first Threshold is referred to as SUL-RSRP-Threshold, but the name of the Threshold is not specifically limited), the ue establishes an RRC connection with the network device using the NUL. If DL RSRP is less than SUL-RSRP-Threshold, the user equipment may establish an RRC connection with the network device using SUL.

In the embodiment of the present invention, the user equipment may further measure DL RSRP before the user equipment re-establishes RRC based on the first timer and/or the second timer. In this way, the user equipment may determine, through the two timers maintained, which uplink to use to reestablish the RRC connection according to states of the two timers after the RRC establishment fails, and there may be several cases as follows:

the first condition is as follows: and if the first timer and the second timer are both in the inactive period and the DL RSRP is less than SUL-RSRP-Threshold, the user equipment reestablishes the RRC connection by using the SUL.

Case two: and if the first timer and the second timer are both in the inactive period and the DL RSRP is greater than or equal to SUL-RSRP-Threshold, the user equipment reestablishes the RRC connection by using the NUL.

Case three: if the second timer is in the active period and the first timer is in the inactive period, the ue may reestablish the RRC connection using the NUL. That is, when the first timer is inactive and the second timer is active, the UE may reattempt access on the SUL regardless of the relationship between NR DL RSRP and SUL-RSRP-Threshold.

Case four: if the first timer is in an active period, the second timer is in an inactive period, and the downlink signal quality value is greater than or equal to the first threshold, the ue may reestablish the RRC connection using the NUL. That is, when the first timer is in the active period and the second timer is in the inactive period, and the UE measures dl RSRP ═ sul-RSRP-Threshold, the UE re-attempts to access on the NUL.

Case five: if the first timer and the second timer are both in the active period, the ue may choose to reestablish the RRC connection using the uplink of the neighboring cell.

In addition, when the sum of the number of times of the RRC connection establishment failure on the NUL + the number of times of the RRC connection establishment failure on the SUL is greater than N, where N is a number of consecutive times that the UE fails to establish the RRC connection on the SUL, the UE may attempt access through other cells. In addition, when the UE transmits power on the NUL to the maximum, the UE may terminate the remaining retransmissions on the NUL in advance and switch to the SUL to re-perform the RRC access.

By the method, the user equipment can measure DL RSRP before random access, and if the DL RSRP is larger than or equal to SUL-RSRP-Threshold, the access can be selected according to the sequence of NUR-SUL-adjacent cell uplink when RRC connection is established with the network equipment. If DL RSRP < SUL-RSRP-Threshold, access may be selected in the order of SUL-neighbor cell uplink when establishing RRC connection with the network device. While the corresponding uplink may be skipped when a certain timer is activated, for example, the user equipment may skip SUL to re-establish the RRC connection when the first timer is activated. For another example, when the second timer is activated, the ue may skip the NUL to re-establish the RRC connection. For another example, when both the first timer and the second timer are activated, the ue may skip the NUL and the SUL to reestablish the RRC connection, and select the uplink of the other cell to reestablish the RRC connection, as shown in fig. 6.

When the UE establishes RRC connection with the network device by using the RRC connection method provided in the embodiment of the present application, the coverage of NR NUL in the SUL scenario is substantially the same as the coverage of NR DL. As shown in fig. 7A, when the UE measures DLRSRP > -sum-RSRP-Threshold, it may access in the order of NUL-SUL-neighbor cells. At this time, the UE is located in the NRNUL coverage area, the UE is closer to the network device in the cell 1, and is further from the network device in the neighboring cell (e.g., the cell 2 or the cell 3), and the SUL has at least some advantage in terms of path loss, so it is reasonable for the UE to attempt to access the network device in the cell 1 closest to the SUL first after the RRC connection on the NUL fails, which is helpful to improve the RRC connection success rate. As shown in fig. 7B, access may be in SUL-neighbor cell order when DL RSRP < SUL-RSRP-Threshold. At this time, when the UE is located outside the NR NUL coverage and within the NR SUL coverage, the path loss of the network device in the scenario where the UE accesses the cell 1 through the NR NUL with a higher frequency is large, so it is reasonable that the UE may attempt to access the network device in the neighboring cell after the SUL access fails. If the first timer and/or the second timer are in the active period, the UE skips the procedure of performing random access in the corresponding UL, for example, when the first timer is activated, the UE may skip the SUL to re-establish the RRC connection. For another example, when the second timer is activated, the ue may skip the NUL to re-establish the RRC connection. For another example, when both the first timer and the second timer are activated, the ue may skip the NUL and the SUL to reestablish the RRC connection, and select the uplink of the other cell to reestablish the RRC connection.

Example two:

the RRC connection method provided in embodiment two of the present application may be as shown in fig. 8, and the method specifically includes:

s801, a network device sends a first message to a user equipment, wherein the first message is used for indicating that the user equipment RRC is failed to establish on a first uplink, and the first message carries a waiting duration, and the first uplink is SUL or NUL. Correspondingly, the user equipment receives a first message sent by the network equipment. Illustratively, the first message may be an RRC reject message (indicating rejection of the RRC connection of the UE).

Before the user equipment receives the first message, the user equipment may further send an RRC connection request message to the network equipment, where the RRC connection request is used to request the network equipment to establish an RRC connection with the user equipment. If the network device fails to establish the RRC connection, an RRC reject message is responded to the user equipment.

For example, the value of the waiting time (wait time) can be divided into 2 types, 0 or non-0, wherein the unit of the wait time of non-0 can be seconds, and if the scene is non-0, the wait time can reach 16 s.

S802, the ue reestablishes the RRC connection based on the waiting duration.

In the embodiment of the application, the network device informs the user equipment of a waiting time or a failure reason after the RRC connection is failed to be established, so that the user equipment can determine which uplink is used for reestablishing the RRC connection according to the waiting time or the failure reason.

For convenience of description, the first uplink is taken as NUL as an example.

When the user equipment reestablishes the RRC connection based on the first information, it may determine that the wait time value in the received first message is: if the wait time length is equal to 0, the user equipment continues to reestablish the RRC connection by using the NUL. The counter value corresponding to the NUL continues to count, and when the counter value of the NUL reaches a maximum value (i.e., is greater than a threshold value), the SUL is used to establish the RRC connection. Wherein, the counter value of NUL refers to the number of RRC connection failures on NUL. If the wait time is greater than 0, the user equipment does not use the NUL to initiate RRC connection. The direct jump uses the SUL to establish the RRC connection, corresponding to the counter value of the SUL to continue counting. Wherein the counter value of the SUL refers to the number of RRC connection failures on the SUL.

Further, if the RRC connection establishment is successful on the SUL, the RRC connection is not re-established, i.e., the following procedure is terminated. If the RRC connection establishment fails on the SUL, it may wait for wait time out before attempting to establish the RRC connection using the NUL.

Further, before the user equipment reestablishes the RRC connection using the first uplink, it may be determined that the number of times the RRC connection fails to be established on the first uplink is not greater than the first threshold. The number of times the RRC connection was established on the second uplink may be determined to be not greater than the first threshold before the user equipment reestablishes the RRC connection using the second uplink.

If the count of both the NUL and the SUL reaches the maximum value, the ue may switch the cell to establish the RRC connection. That is, if the number of times of the RRC connection establishment failure on the first uplink is greater than the first threshold and the number of times of the RRC connection establishment failure on the second uplink is greater than the second threshold, the ue may reestablish the RRC connection using the uplink of the neighboring cell.

In the second embodiment of the application, by judging the value of the wait time, if the wait time is not 0, the user equipment directly uses the SUL to initiate RRC connection after the RRC connection established on the NUL fails; after the wait time is out of time, the NUL is used to establish the RRC connection, and if the NUL and the counter of the SUL both reach the maximum value, the user equipment may switch the cell to establish the RRC connection, thereby implementing the NUL and the SUL to be used alternately, and further improving the accuracy of establishing the RRC connection between the user equipment and the network equipment, as shown in fig. 9.

Example three: currently, after the UE receives the RRC reject message, the UE side typically starts a Timer (e.g. 300s) and adds the cell to the blacklist, and the UE will not attempt to access the cell until the Timer ends. The user equipment is not aware of specific reasons for the RRC connection establishment failure, such as: a long-distance super-large radius; physical Uplink Control CHannel (PUCCH) resources are insufficient, cHannel Sounding Reference Signal (SRS) resources are insufficient, the number of users is excessive, flow control, power is insufficient, and other reasons are judged and identified by the network device side, for example, RRC establishment fails due to excessive users, Central Processing Unit (CPU) overload, and other reasons, and the network device may send an RRC reject message to the user device. In the third embodiment of the present application, the network device carries the failure reason (for example, may indicate through idex) when sending the RRC reject message, and tells the user equipment to send the reason for the RRC establishment failure: the user equipment can execute the next action according to the failure reason indicated by the network equipment instead of repeated RRC connection for many times blindly, so that the accuracy of establishing RRC connection between the user equipment and the network equipment can be improved, and the user experience can be further improved.

The RRC connection method provided in the third embodiment of the present application may be as shown in fig. 10, and the method specifically includes:

s1001, a network device sends a first message to a user equipment, wherein the first message is used for indicating that the user equipment has a failure in establishing RRC connection on a first uplink, and the first message carries a reason of the failure in establishing RRC connection, and the first uplink is SUL or NUL. Correspondingly, the user equipment receives a first message sent by the network equipment. Illustratively, the first message may be an RRC reject message (indicating rejection of the RRC connection of the UE).

Before receiving the first message, the ue may further send an RRC connection request message to the network device, where the RRC connection request is used to request the network device to establish an RRC connection with the ue. The ue may also receive an RRC reject message sent back from the network device if the network device fails to establish the RRC connection.

In specific implementation, the first message may carry an index number corresponding to the failure cause, so that the user equipment may determine the specific cause of the RRC establishment failure according to the index number. Or, the first message may also carry the specific content of the failure reason, so that the user equipment may acquire the specific reason of the failure after receiving the first message. Of course, the first message may also carry the failure reason in other manners, which is not specifically limited herein.

S1002, the ue reestablishes the RRC connection based on the reason for the RRC establishment failure.

In the embodiment of the application, the network device informs the user equipment of the reason of the failure after the RRC connection is failed to be established, so that the user equipment can determine which uplink is used for reestablishing the RRC connection according to the waiting time or the reason of the failure, and the RRC connection is not established repeatedly and blindly.

For convenience of description, the first uplink is taken as NUL as an example.

For example, the failure cause may be that the distance between the user equipment and the network equipment exceeds a threshold value or the network equipment fails to decode. Accordingly, the ue may reduce the number of times of RRC connection repetition according to the failure reason, increase power to perform RRC connection, or directly switch to the SUL for RRC connection. As shown in fig. 11A.

Also for example, the failure cause may be an overload of the CPU of the network device. Accordingly, the user equipment can be directly switched to other network equipment according to the failure reason, namely, switched to a cell covered by other network equipment. As shown in fig. 11B.

Of course, the failure reason may also be other reasons, for example, PUCCH resources are insufficient, SRS resources are insufficient, the number of users is too many, flow control, power is insufficient, and the like, and correspondingly, the user equipment may select a scheme for establishing RRC connection according to a specific reason, which is not described here one by one.

In specific implementation, when the user equipment executes different RRC connection establishment schemes, the success rate of RRC (the success rate of different schemes corresponding to different reasons) may be recorded, so that a suitable execution policy may be formulated in combination with the failure reason and the success rate corresponding to each scheme.

Based on the same technical concept as that of the method embodiment, the embodiment of the present application provides a radio resource control connection apparatus, which may have a structure as shown in fig. 12 and includes a processing unit 1201 and a transceiving unit 1202. The apparatus is specifically configured to implement the functions of the user equipment in the embodiments of fig. 1 to 11B, and the apparatus may be the user equipment itself, or may also be a chip or a chip set in the user equipment or a part of the chip for executing the functions of the related method.

The processing unit 1201 and the transceiving unit 1202 cooperate with each other to implement two RRC connection procedures, which will be described in detail below.

The first embodiment is as follows:

a transceiving unit 1202, configured to receive a first message sent by a network device, where the first message is used to indicate that a radio resource control, RRC, connection of a user equipment is failed to be established. A processing unit 1201, configured to reestablish the RRC connection based on a first timer and/or a second timer, where the first timer indicates that the supplemental uplink is not allowed to be used if the first timer is in an active period, the supplemental uplink is allowed to be used if the first timer is in an inactive period, the non-supplemental uplink is not allowed to be used if the second timer is in an active period, and the non-supplemental uplink is allowed to be used if the second timer is in an inactive period.

In one implementation, the processing unit may be specifically configured to: and if the second timer is in the active period and the first timer is in the inactive period, reestablishing the RRC connection by using the supplementary uplink.

In another implementation manner, the processing unit may be further configured to: and measuring the downlink signal quality value to obtain the downlink signal quality value before the RRC connection is reestablished based on the first timer and/or the second timer. Thus, the processing unit, when re-establishing the RRC connection based on the first timer and/or the second timer, may specifically be configured to: and if the first timer is in the active period, the second timer is in the inactive period, and the downlink signal quality value is greater than or equal to the first threshold value, reestablishing the RRC connection by using the non-supplementary uplink.

In another implementation manner, when the RRC connection is reestablished based on the first timer and/or the second timer, the processing unit may be further specifically configured to: and if the first timer and the second timer are both in the active period, the user equipment selects to use the uplink of the adjacent cell to reestablish the RRC connection.

In another implementation manner, the processing unit may be further configured to: and measuring the downlink signal quality value to obtain the downlink signal quality value before the RRC connection is reestablished based on the first timer and/or the second timer. Thus, the processing unit, when re-establishing the RRC connection based on the first timer and/or the second timer, may specifically be configured to: if the first timer and the second timer are both in the inactive period and the downlink signal quality value is smaller than the first threshold value, reestablishing the RRC connection by using the supplementary uplink; and if the first timer and the second timer are both in the inactive period and the downlink signal quality value is greater than or equal to the first threshold value, reestablishing the RRC connection by using the non-supplementary uplink.

In some embodiments, the processing unit may be further configured to: if the user equipment fails to establish RRC connection on the supplementary uplink for N times, activating a first timer, wherein N is an integer greater than 0; and/or if the user equipment fails to establish RRC connection on the non-supplementary uplink for M times, activating a second timer, wherein M is an integer greater than 0; and/or activating a second timer if the transmit power of the user equipment on the non-supplemental uplink reaches a second threshold; and/or if the sum of the first times and the second times is greater than a third threshold, activating a first timer and a second timer, wherein the first times is the times of failure of the user equipment in establishing the RRC connection on the supplementary uplink, and the second times is the times of failure of the user equipment in establishing the RRC connection on the non-supplementary uplink.

Example two:

a transceiving unit 1202, configured to receive a first message sent by a network device, where the first message is used to indicate that a radio resource control RRC connection of a user equipment fails to be established on a first uplink, and the first message carries first information, where the first information is a waiting duration or a failure cause, and the first uplink is a supplemental uplink or a non-supplemental uplink. A processing unit 1201 configured to reestablish the RRC connection based on the first information.

Taking the first information as the waiting duration as an example, the processing unit may be specifically configured to: if the waiting time length is equal to 0, reestablishing RRC connection by using the first uplink; if the waiting time is longer than 0, reestablishing RRC connection by using a second uplink, wherein if the first uplink is a supplementary uplink, the second uplink is a non-supplementary uplink; alternatively, if the first uplink is a non-supplemental uplink, the second uplink is a supplemental uplink.

The transceiver unit may further be configured to: and after the processing unit reestablishes the RRC connection by using the second uplink, receiving a second message sent by the network equipment, wherein the second message is used for indicating that the RRC connection of the user equipment fails to be established on the second uplink. A processing unit, further operable to: after the waiting time period expires, the RRC connection is reestablished using the first uplink.

Further, the processing unit may be further configured to: determining that a number of failures to establish the RRC connection on the first uplink is not greater than a first threshold before reestablishing the RRC connection using the first uplink. Determining that a number of failures to establish the RRC connection on the second uplink is not greater than a first threshold before reestablishing the RRC connection using the second uplink.

A processing unit, also operable to: and if the times of the RRC connection establishment failure on the first uplink are larger than a first threshold value and the times of the RRC connection establishment failure on the second uplink are larger than a second threshold value, reestablishing the RRC connection by using the uplink of the adjacent cell.

Taking the first message as an example of the failure reason, the processing unit, when reestablishing the RRC connection based on the first message, may specifically be configured to: if the failure reason is that the distance between the user equipment and the network equipment exceeds a threshold value, or the failure reason is that the network equipment fails to decode, reestablishing RRC connection by using a second uplink, wherein if the first uplink is a supplementary uplink, the second uplink is a non-supplementary uplink; or, if the first uplink is a non-supplemental uplink, the second uplink is a supplemental uplink; or, if the failure reason is that the network equipment is overloaded, switching to other network equipment to reestablish the RRC connection.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

When the integrated module may be implemented in the form of hardware, the functions of the transceiver unit 1202 may be implemented by the transceiver 101 of the user equipment shown in fig. 3, and the functions of the processing unit 1201 may be implemented by the processor 102 of the user equipment shown in fig. 3.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 apparatus 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A radio resource control connection method, comprising:

the method comprises the steps that user equipment receives a first message sent by network equipment, wherein the first message is used for indicating the RRC connection establishment failure of the user equipment;

the user equipment reestablishes the RRC connection based on a first timer, or reestablishes the RRC connection based on the first timer and a second timer, wherein if the first timer is in an active period, the user equipment indicates that supplementary uplink is not allowed to be used, if the first timer is in an inactive period, the user equipment indicates that supplementary uplink is allowed to be used, if the second timer is in an active period, the user equipment indicates that non-supplementary uplink is not allowed to be used, and if the second timer is in an inactive period, the user equipment indicates that non-supplementary uplink is allowed to be used.

2. The method of claim 1, wherein the user equipment re-establishing the RRC connection based on the first timer and the second timer comprises:

if the second timer is in an active period and the first timer is in an inactive period, the UE reestablishes the RRC connection using the supplemental uplink.

3. The method of claim 1, further comprising, before the user equipment reestablishes the RRC connection based on the first timer and the second timer:

the user equipment measures a downlink signal quality value;

the user equipment reestablishes the RRC connection based on the first timer and the second timer, comprising:

and if the first timer is in an active period, the second timer is in a non-active period, and the downlink signal quality value is greater than or equal to a first threshold value, the user equipment reestablishes the RRC connection by using the non-supplementary uplink.

4. The method of claim 1, wherein the user equipment re-establishing the RRC connection based on the first timer and the second timer comprises:

and if the first timer and the second timer are both in the active period, the UE selects to use the uplink of the neighbor cell to reestablish RRC connection.

5. The method of claim 1, further comprising, before the user equipment reestablishes the RRC connection based on the first timer and the second timer:

the user equipment measures a downlink signal quality value;

if the first timer and the second timer are both in the inactive period and the downlink signal quality value is smaller than a first threshold, the UE reestablishes the RRC connection by using the supplemental uplink;

and if the first timer and the second timer are both in a non-active period and the downlink signal quality value is greater than or equal to the first threshold value, the UE reestablishes the RRC connection by using the non-supplementary uplink.

6. The method of any of claims 1 to 5, further comprising:

if the user equipment fails to establish RRC connection on the supplementary uplink for N times continuously, the user equipment activates the first timer, wherein N is an integer greater than 0; and/or

If the user equipment fails to establish RRC connection on the non-supplementary uplink for M times continuously, the user equipment activates the second timer, wherein M is an integer greater than 0; and/or

Activating, by the UE, the second timer if the transmit power of the UE on the non-supplemental uplink reaches a second threshold; and/or

And if the sum of the first time and the second time is greater than a third threshold, the user equipment activates the first timer and the second timer, wherein the first time is the time for which the user equipment fails to establish the RRC connection on the supplementary uplink, and the second time is the time for which the user equipment fails to establish the RRC connection on the non-supplementary uplink.

7. A radio resource control connection apparatus, comprising:

a receiving and sending unit, configured to receive a first message sent by a network device, where the first message is used to indicate that RRC connection establishment of user equipment is failed;

a processing unit, configured to reestablish an RRC connection based on a first timer, or reestablish an RRC connection based on the first timer and a second timer, where the first timer indicates that supplementary uplink is not allowed to be used if the first timer is in an active period, the first timer indicates that supplementary uplink is allowed to be used if the first timer is in an inactive period, the second timer indicates that non-supplementary uplink is not allowed to be used if the second timer is in an active period, and the second timer indicates that non-supplementary uplink is allowed to be used if the second timer is in an inactive period.

8. The apparatus as claimed in claim 7, wherein said processing unit is specifically configured to:

and if the second timer is in an active period and the first timer is in an inactive period, reestablishing the RRC connection by using the supplementary uplink.

9. The apparatus as recited in claim 7, said processing unit to further: measuring a downlink signal quality value prior to re-establishing the RRC connection based on the first and second timers;

the processing unit, when re-establishing the RRC connection based on the first timer and the second timer, is specifically configured to:

and if the first timer is in an active period, the second timer is in a non-active period, and the downlink signal quality value is larger than or equal to a first threshold value, reestablishing the RRC connection by using the non-supplementary uplink.

10. The apparatus of claim 7, wherein the processing unit, when re-establishing the RRC connection based on the first timer and the second timer, is specifically configured to:

11. The apparatus as recited in claim 7, said processing unit to further: measuring a downlink signal quality value prior to re-establishing the RRC connection based on the first and second timers;

if the first timer and the second timer are both in the inactive period and the downlink signal quality value is less than a first threshold, reestablishing the RRC connection by using the supplementary uplink;

and if the first timer and the second timer are both in a non-active period and the downlink signal quality value is greater than or equal to the first threshold value, reestablishing the RRC connection by using the non-supplementary uplink.

12. The apparatus of any of claims 7 to 11, wherein the processing unit is further configured to:

if the user equipment fails to establish RRC connection on the supplementary uplink for N times, activating the first timer, wherein N is an integer greater than 0; and/or

If the user equipment fails to establish RRC connection on the non-supplementary uplink for M times continuously, activating the second timer, wherein M is an integer greater than 0; and/or

Activating the second timer if the transmit power of the UE on the non-supplemental uplink reaches a second threshold; and/or

And if the sum of the first time and the second time is greater than a third threshold, activating the first timer and the second timer, wherein the first time is the time for which the user equipment fails to establish the RRC connection on the supplementary uplink, and the second time is the time for which the user equipment fails to establish the RRC connection on the non-supplementary uplink.

13. A computer readable storage medium, in which a program or instructions are stored, which when read and executed by one or more processors, implement the method of any one of claims 1 to 6.