CN113115385B - Reselection method and device for new radio terminal in control connection recovery - Google Patents
Reselection method and device for new radio terminal in control connection recovery Download PDFInfo
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- CN113115385B CN113115385B CN202110341628.8A CN202110341628A CN113115385B CN 113115385 B CN113115385 B CN 113115385B CN 202110341628 A CN202110341628 A CN 202110341628A CN 113115385 B CN113115385 B CN 113115385B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00837—Determination of triggering parameters for hand-off
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention aims to provide a reselection method and equipment for a new radio terminal in control connection recovery, and provides a cell reselection evaluation processing method in the process of migrating an NR terminal from an inactive state to a connection state aiming at the risk of reselection in the process of migrating the NR terminal from the inactive state to the connection state, so that the service risk caused by reselection in the process of migrating the NR terminal from the inactive state to the connection state is reduced, unnecessary reselection processes are avoided, and the telephone service success rate and user satisfaction of the NR terminal are improved.
Description
Technical Field
The invention relates to a reselection method and equipment for a new radio terminal in control connection recovery.
Background
New Radio (NR) is a global fifth generation mobile communication system standard based on a completely new air interface design of Orthogonal Frequency Division Multiplexing (OFDM), and is also a very important cellular mobile technology base of the next generation; compared with 4G LTE, which has two RRC states, namely RRC IDLE and RRC CONNECTED, 5G NR introduces a new state, namely RRC INACTIVE; devices supporting the 5G NR protocol may perform state transitions between three states, RRC IDLE, RRC CONNECTED, and RRC INACTIVE.
The terminal equipment can keep the context of the core network when entering the RRC_INACTIVE state and cannot release the context; if there is data to be received or transmitted in the rrc_inactive state, it is necessary to transition to the rrc_connected state through a RRC connection resume procedure; the first step of RRC connection resume is to send RRC connection resume request a message to an access network in SRB0 through an uplink logical channel UL-CCCH in a random access process, and wait for the access network to issue RRC connection resume message or RRC connection setup, RRC connection reject message after successful sending; the reselection may occur in the process according to the 3GPP protocol 38.331 requirements.
If a New Radio (NR) terminal device reselects during a transition from an inactive state (RRC inactive) to a connected state (RRC connected), there is a risk that the traffic triggering the NR terminal to migrate will be:
(1) The NR terminal reselection process is influenced by the network real-time signal quality, the synchronization of a target cell and the time of the channel establishment process can be longer, the overall service time consumption is increased, and the telephone service use experience satisfaction of a terminal user is reduced;
(2) When the NR terminal reselects the target NR cell and the current resident NR cell do not belong to the same gNB, the incoming call answering flow fails;
(3) When the NR terminal reselects the target cell and belongs to another access network notification area (RAN-based Notification Area, RNA for short), an additional access network notification area update (RNA update) process exists after the reselection is successful; in the process of updating the notification area of the access network, the dialing process may fail under the condition that the complexity of the process is increased due to network compatibility or network lack of optimization and other factors.
Disclosure of Invention
An object of the present invention is to provide a reselection method and apparatus for a new radio terminal in controlling connection restoration.
According to one aspect of the present invention, there is provided a reselection method and system for a new radio terminal in controlling connection recovery, the method comprising:
the new radio terminal initiates service requirements in a radio resource control inactive state;
the new radio terminal sends a migration request to the wireless data network from implementing the inactive state of radio resource control to the connected state of radio resource control so as to subsequently complete the service requirement in the connected state of radio resource control;
the new radio terminal, while waiting for the wireless data network to reply to the migration request, determines whether there are reselectable neighboring cells,
if there are adjacent cells that can be reselected, it is determined whether the signal combination value of the cell where the new radio terminal currently resides is lower than a preset threshold combination value,
if the combination value is higher than or equal to the preset threshold combination value and the service requirement is telephone service, the new radio terminal does not execute the reselection operation of the adjacent cell and keeps camping on the cell where the new radio terminal is currently camping.
Further, in the above method, it is determined whether the signal combination value of the cell in which the new radio terminal currently resides is lower than a preset threshold combination value,
if the combination value is lower than the preset threshold combination value, the new radio terminal executes the reselection operation of the adjacent cell so as to switch the cell which is currently resident into the reselectable adjacent cell.
Further, in the above method, determining whether there is a reseltable neighbor cell includes:
determining whether there is a neighboring cell having a higher priority than the cell in which the new radio terminal is currently camping, or whether there is a neighboring cell having a better signal measurement value than the signal measurement value of the cell in which the new radio terminal is currently camping,
if yes, a reselectable adjacent cell exists;
if not, there are adjacent cells which can be reselected.
Further, in the above method, the signal combination value includes: a reference signal received power value, a reference signal received quality value, and a signal to noise value.
According to another aspect of the present invention, there is also provided a new radio terminal, wherein the new radio terminal includes:
an initiating unit, configured to initiate a service requirement in a radio resource control inactive state;
a migration unit, configured to send a migration request to the wireless data network from implementing inactive state migration of radio resource control to a radio resource control connection state, so as to complete the service requirement in the radio resource control connection state later;
and the judging unit is used for judging whether a reselectable adjacent cell exists in the process of waiting for the reply message of the migration request by the wireless data network, judging whether the signal combination value of the cell where the new radio terminal currently resides is lower than a preset threshold combination value if the reselectable adjacent cell exists, and if the signal combination value of the cell where the new radio terminal currently resides is higher than or equal to the preset threshold combination value and the service requirement is telephone service, not executing the reselection operation of the adjacent cell and continuously keeping the cell where the new radio terminal currently resides.
Further, in the above new radio terminal, the determining unit is further configured to, if the combination value is lower than a preset threshold combination value, perform a reselection operation of the neighboring cell by the new radio terminal, so as to switch the currently camping cell to a reselectable neighboring cell.
Further, in the above new radio terminal, the determining unit is configured to determine whether there is a neighboring cell having a higher priority than a cell in which the new radio terminal currently resides, or whether there is a neighboring cell having a signal measurement value better than a signal measurement value of a cell in which the new radio terminal device currently resides, and if so, there is a neighboring cell that is selectable; if not, there are adjacent cells which can be reselected.
Further, in the above new radio terminal, the signal combination value includes: a reference signal received power value, a reference signal received quality value, and a signal to noise value.
According to another aspect of the present invention there is also provided a computer readable medium having stored thereon computer readable instructions executable by a processor to implement the method of any one of the above.
According to another aspect of the present invention there is also provided an apparatus for information processing at a network device, the apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to perform the method of any of the preceding claims.
Compared with the prior art, the invention provides a processing method for the NR terminal from the inactive state (RRC inactive) to the connected state (RRC connected) in the process of the NR terminal from the inactive state (RRC inactive) to the connected state (RRC connected), so that the service risk caused by the reselection of the NR terminal from the inactive state (RRC inactive) to the connected state (RRC connected) is reduced, the unnecessary reselection process is avoided, and the telephone service success rate and the user satisfaction of the NR terminal are improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic diagram of a reselection method in controlling connection recovery for a new radio terminal according to an embodiment of the present invention.
The same or similar reference numbers in the drawings refer to the same or similar parts.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
In one typical configuration of the present application, the terminal, the device of the service network, and the trusted party each include one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer readable media, as defined herein, does not include non-transitory computer readable media (transmission media), such as modulated data signals and carrier waves.
The invention provides a reselection method of a new radio terminal in control connection recovery, which comprises the following steps:
step S1, a new radio terminal initiates service requirements in a radio resource control inactivity (RRC inactive);
step S2, the new radio terminal sends a migration request from the implementation radio resource control inactive state (RRC inactive) to the radio resource control connected state (RRC connected) to the wireless data network so as to complete the service requirement in the radio resource control connected state subsequently;
step S3, the new radio terminal judges whether a reselectable adjacent cell exists in the process of waiting for the reply message of the wireless data network to the migration request,
if there are adjacent cells that can be reselected, it is determined whether the signal combination value of the cell where the new radio terminal currently resides is lower than a preset threshold combination value,
if the combination value is higher than or equal to the preset threshold combination value and the service requirement is telephone service, the new radio terminal does not execute the reselection operation of the adjacent cell and keeps camping on the cell where the new radio terminal is currently camping.
The key point of the present invention is to prevent unnecessary reselection in the initiated phone related service process in the process of transferring a New Radio (NR) terminal device initiated by a phone service from a radio resource control inactive state (RRC inactive) to a radio resource control connected state (RRC connected), and maintain the stability of the terminal device in a cell where the terminal device resides as much as possible in the state transfer process, thereby improving the success rate of the phone service.
The invention prevents unnecessary reselection in the process of initiating telephone related service when a New Radio (NR) terminal device is migrated from a radio resource control inactive state (RRC inactive) to a radio resource control connected state (RRC connected), and maintains the stability of the residence cell of the terminal device as much as possible in the state migration process, thereby improving the success rate of NR terminal telephone service.
In one embodiment of the reselection method in controlling connection restoration of the new radio terminal of the present invention, it is determined whether the signal combination value of the cell in which the new radio terminal currently resides is lower than a preset threshold combination value,
if the combination value is lower than the preset threshold combination value, the new radio terminal executes the reselection operation of the adjacent cell so as to switch the cell which is currently resident into the reselectable adjacent cell.
In an embodiment of a reselection method in controlling connection recovery, the method for determining whether there is a reselectable neighboring cell by a new radio terminal includes:
determining whether there is a neighboring cell having a higher priority than a cell in which a New Radio (NR) terminal is currently camping, or whether there is a neighboring cell having a signal measurement value better than a signal measurement value of a cell in which a New Radio (NR) terminal is currently camping,
if yes, a reselectable adjacent cell exists;
if not, there are adjacent cells which can be reselected.
In an embodiment of the reselection method in controlling connection recovery for a new radio terminal of the present invention, the signal combination value includes: a Reference Signal Received Power (RSRP) value, a Reference Signal Received Quality (RSRQ) value, and a signal-to-noise ratio (SINR) value.
In the process of transferring a New Radio (NR) terminal device caused by telephone service from a radio resource control inactive state (RRC inactive) to a radio resource control connected state (RRC connected), when performing reselection evaluation, the signal value of a cell where the New Radio (NR) terminal device resides, namely, reference Signal Received Power (RSRP), reference Signal Received Quality (RSRQ) and signal to noise ratio (SINR), is worse than a certain fixed combination threshold value, and the reselection is not performed otherwise. The accuracy of reselection evaluation is ensured.
Specifically, the detailed implementation flow of the present invention is described below in conjunction with the following figures:
(1) Initially, a New Radio (NR) terminal device controls inactivity (RRCinactive) from radio resources;
(2) Because the New Radio (NR) terminal device has a service request, including but not limited to, making a call by a user, receiving an incoming notification message (paging), surfing the internet by the user, initiating automatic update by some application programs on the terminal device, etc., data and signaling transmission and reception need to occur with the network, which cannot be completed in a radio resource control inactive state (RRC inactive), and the New Radio (NR) terminal device needs to be migrated to a radio resource control connected state (RRC connected); to accomplish this, the New Radio (NR) terminal device sends RRC connection resume request a message to the wireless data network over the uplink logical channel UL-CCCH at SRB0 and then waits for a wireless data network side reply message; the New Radio (NR) terminal device continues to maintain neighbor cell signal measurements and reselection evaluations at this time;
(3) Due to the change of wireless data network signals, the adjacent cells have higher priority than the cell where the New Radio (NR) terminal equipment currently resides or the signal measurement value is better than the cell where the New Radio (NR) terminal equipment currently resides, and the reselection evaluation condition is met to carry out the subsequent step (4);
(4) The New Radio (NR) terminal device evaluates signal combination values of a currently camping New Radio (NR) cell, i.e. Reference Signal Received Power (RSRP), reference Signal Received Quality (RSRQ), signal to noise ratio (SINR), and if the signal combination values are worse than a certain preset threshold combination value, performs the cell reselection procedure; if the signal combination value is better than a certain preset threshold combination value and the service initiated in the process (2) is a telephone related service such as making a call, receiving an incoming call and the like, the reselection operation is not executed, and the residence is kept on the cell.
According to another aspect of the present invention, there is also provided a new radio terminal, wherein the new radio terminal includes:
an initiating unit, configured to initiate a service requirement in a radio resource control inactive state;
a migration unit, configured to send a migration request to the wireless data network from implementing inactive state migration of radio resource control to a radio resource control connection state, so as to complete the service requirement in the radio resource control connection state later;
and the judging unit is used for judging whether a reselectable adjacent cell exists in the process of waiting for the reply message of the migration request by the wireless data network, judging whether the signal combination value of the cell where the new radio terminal currently resides is lower than a preset threshold combination value if the reselectable adjacent cell exists, and if the signal combination value of the cell where the new radio terminal currently resides is higher than or equal to the preset threshold combination value and the service requirement is telephone service, not executing the reselection operation of the adjacent cell and continuously keeping the cell where the new radio terminal currently resides.
Further, in the above new radio terminal, the determining unit is further configured to, if the combination value is lower than a preset threshold combination value, perform a reselection operation of the neighboring cell by the new radio terminal, so as to switch the currently camping cell to a reselectable neighboring cell.
Further, in the above new radio terminal, the determining unit is configured to determine whether there is a neighboring cell having a higher priority than a cell in which the new radio terminal currently resides, or whether there is a neighboring cell having a signal measurement value better than a signal measurement value of a cell in which the new radio terminal device currently resides, and if so, there is a neighboring cell that is selectable; if not, there are adjacent cells which can be reselected.
Further, in the above new radio terminal, the signal combination value includes: a reference signal received power value, a reference signal received quality value, and a signal to noise value.
According to another aspect of the present invention there is also provided a computer readable medium having stored thereon computer readable instructions executable by a processor to implement the method of any one of the above.
According to another aspect of the present invention there is also provided an apparatus for information processing at a network device, the apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to perform the method of any of the preceding claims.
Details of each device and storage medium embodiment of the present invention may refer to corresponding parts of each method embodiment, and are not described herein.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
It should be noted that the present invention may be implemented in software and/or a combination of software and hardware, e.g., using Application Specific Integrated Circuits (ASIC), a general purpose computer or any other similar hardware device. In one embodiment, the software program of the present invention may be executed by a processor to perform the steps or functions described above. Likewise, the software programs of the present invention (including associated data structures) may be stored on a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. In addition, some steps or functions of the present invention may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.
Furthermore, portions of the present invention may be implemented as a computer program product, such as computer program instructions, which when executed by a computer, may invoke or provide methods and/or techniques in accordance with the present invention by way of operation of the computer. Program instructions for invoking the inventive methods may be stored in fixed or removable recording media and/or transmitted via a data stream in a broadcast or other signal bearing medium and/or stored within a working memory of a computer device operating according to the program instructions. An embodiment according to the invention comprises an apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to operate a method and/or a solution according to the embodiments of the invention as described above.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. A plurality of units or means recited in the apparatus claims can also be implemented by means of one unit or means in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
Claims (10)
1. A method of reselection of a new radio terminal in controlling connection recovery, wherein the method comprises:
the new radio terminal initiates service requirements in a radio resource control inactive state;
the new radio terminal sends a migration request to the wireless data network from implementing the inactive state of radio resource control to the connected state of radio resource control so as to subsequently complete the service requirement in the connected state of radio resource control;
the new radio terminal, while waiting for the wireless data network to reply to the migration request, determines whether there are reselectable neighboring cells,
if there are adjacent cells that can be reselected, it is determined whether the signal combination value of the cell where the new radio terminal currently resides is lower than a preset threshold combination value,
if the service requirement is telephone service and the service requirement is higher than or equal to the preset threshold combination value, the new radio terminal does not execute the reselection operation of the adjacent cell, and continues to stay resident in the cell where the new radio terminal is currently resident so as to prevent unnecessary reselection.
2. The method of claim 1, wherein it is determined whether a signal combination value of a cell in which the new radio terminal currently camps is lower than a preset threshold combination value,
if the combination value is lower than the preset threshold combination value, the new radio terminal executes the reselection operation of the adjacent cell so as to switch the cell which is currently resident into the reselectable adjacent cell.
3. The method of claim 1, wherein determining whether there are reselectable neighbor cells comprises:
determining whether there is a neighboring cell having a higher priority than the cell in which the new radio terminal is currently camping, or whether there is a neighboring cell having a better signal measurement value than the signal measurement value of the cell in which the new radio terminal is currently camping,
if yes, a reselectable adjacent cell exists;
if not, there are adjacent cells which can be reselected.
4. The method of claim 1, wherein the signal combination value comprises: a reference signal received power value, a reference signal received quality value, and a signal to noise value.
5. A new radio terminal, wherein the new radio terminal comprises:
an initiating unit, configured to initiate a service requirement in a radio resource control inactive state;
a migration unit, configured to send a migration request to the wireless data network from implementing inactive state migration of radio resource control to a radio resource control connection state, so as to complete the service requirement in the radio resource control connection state later;
and the judging unit is used for judging whether a reselectable adjacent cell exists in the process of waiting for the wireless data network to reply the message, judging whether the signal combination value of the cell where the new radio terminal currently resides is lower than a preset threshold combination value if the reselectable adjacent cell exists, and if the signal combination value of the cell where the new radio terminal currently resides is higher than or equal to the preset threshold combination value and the service requirement is telephone service, not executing the reselection operation of the adjacent cell, and continuously keeping the cell where the new radio terminal currently resides so as to prevent unnecessary reselection.
6. The new radio terminal of claim 5, wherein the judging unit is further configured to perform a reselection operation of the neighboring cell if the combination value is lower than a preset threshold combination value, so as to switch the currently camping cell to a reselectable neighboring cell.
7. The new radio terminal according to claim 5, wherein the judging unit is configured to judge whether there is a neighboring cell having a higher priority than a cell in which the new radio terminal is currently camping, or whether there is a neighboring cell whose signal measurement value is better than a signal of a cell in which the new radio terminal device is currently camping, and if so, there is a neighboring cell which is selectable; if not, there are adjacent cells which can be reselected.
8. The new radio terminal of claim 5, wherein the signal combination value comprises: a reference signal received power value, a reference signal received quality value, and a signal to noise value.
9. A computer readable medium having stored thereon computer readable instructions executable by a processor to implement the method of any one of claims 1 to 4.
10. An apparatus for information processing at a network device, the apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to perform the method of any one of claims 1 to 4.
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