CN112383928A - Cell reselection method, terminal equipment and storage medium - Google Patents

Cell reselection method, terminal equipment and storage medium Download PDF

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Publication number
CN112383928A
CN112383928A CN202011136900.0A CN202011136900A CN112383928A CN 112383928 A CN112383928 A CN 112383928A CN 202011136900 A CN202011136900 A CN 202011136900A CN 112383928 A CN112383928 A CN 112383928A
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cell
reselection
terminal device
reselection priority
priority
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CN202011136900.0A
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CN112383928B (en
Inventor
杨兴随
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Oppo Chongqing Intelligent Technology Co Ltd
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Oppo Chongqing Intelligent Technology Co Ltd
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Priority to CN202211087912.8A priority Critical patent/CN116321213A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the invention discloses a cell reselection method, terminal equipment and a storage medium, which are applied to the technical field of communication and can solve the problem of low transmission rate of services. The method comprises the following steps: if the RRC connection of the terminal equipment in the first cell fails to be established, the terminal equipment does not try to establish the RRC connection in the first cell within a first preset time length, and the first reselection priority of the first cell is modified into a second reselection priority; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection; the first cell is a cell where the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.

Description

Cell reselection method, terminal equipment and storage medium
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a cell reselection method, terminal equipment and a storage medium.
Background
At present, according to the specification of the 3GPP protocol, before a User Equipment (UE) initiates a Mobile Originating (MO) service, an access barring check needs to be performed, an RRC connection can be established after the check passes, and then the MO service is initiated normally, if the UE does not pass the access barring check, the UE needs to wait for a preset time period before performing next retry in a current cell, so that within the preset time period, the UE cannot establish an RRC connection in a first cell, thereby implementing normal transmission of the service, and thus the service transmission rate is low.
Disclosure of Invention
The embodiment of the invention provides a cell reselection method, a device and a system, which are used for solving the problem of low transmission rate of services in the prior art. In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:
in a first aspect, a cell reselection method is provided, and the method includes:
if the RRC connection of the terminal equipment in the first cell fails to be established, the terminal equipment does not attempt to establish the RRC connection in the first cell within a first preset time length, and the first reselection priority of the first cell is modified into a second reselection priority;
in response to a change in reselection priority of the first cell, the terminal device performing cell reselection;
wherein the first cell is a cell in which the terminal device currently resides, and the second reselection priority is lower than the first reselection priority,
and the second reselection priority is lower than a reselection priority of at least one neighboring cell of the first cell.
In a second aspect, a terminal device is provided, which includes:
a processing module for
The processing module is configured to, if the RRC connection establishment of the terminal device in the first cell fails, not attempt to establish the RRC connection in the first cell by the terminal device within a first preset time period, and modify a first reselection priority of the first cell to a second reselection priority; in response to a change in reselection priority of the first cell, the terminal device performing cell reselection;
the first cell is a cell in which the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.
In a third aspect, a terminal device is provided, including:
a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing a cell reselection method as described in the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, which stores a computer program, and the computer program enables a computer to execute the cell reselection method in the first aspect of the embodiment of the present invention.
In a fifth aspect, there is provided a computer program product which, when run on a computer, causes the computer to perform the cell reselection method of the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, if the RRC connection establishment of the terminal equipment in the first cell fails, the terminal equipment does not try to establish the RRC connection in the first cell within a first preset time length, and the first reselection priority of the first cell is modified into the second reselection priority; in response to a change in reselection priority of the first cell, the terminal device performing cell reselection; the first cell is a cell in which the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell. By this scheme, if the terminal equipment fails to establish the RRC connection in the cell where the terminal equipment currently resides, the terminal device can not try to access the first cell to initiate the calling service or receive the called service within the first preset time length, and at this time, the terminal device does not need to wait for a first preset time length to retry in the first cell, the terminal device may be triggered to perform cell reselection by modifying the first reselection priority of the currently camped first cell to a second, smaller reselection priority (lower than the first reselection priority, and lower than the reselection priority of the at least one neighboring cell of the first cell), so that it may have an opportunity to reselect to another cell, and attempting to establish RRC connection on other cells to initiate MO service or receive called service, thereby ensuring timely transmission of service and improving the transmission rate of service.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a system architecture diagram of a wireless communication system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a cell reselection method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a reselection rule provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of a mobile phone according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first" and "second," and the like, in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first cell and the second cell, etc. are for distinguishing different cells, rather than for describing a particular order of the two cells.
The terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
According to the 3GPP protocol, before a User Equipment (UE) initiates an MO service, an access barring check needs to be performed. The MO service can be initiated normally only after the access barring check is passed, or after the access barring check, if the access barring is barred from the current cell (i.e. after being dropped by Bar), the UE needs to wait for the access barring time (Tbarring) to perform the next retry (retry).
The MO service may include: calling Data (MO-Data) service, calling Signaling (MO-Signaling) service, calling long term evolution voice Call (MO-VoLTE Call) service, and calling long term evolution video Call (MO-ViLTE Call) service.
The Access barring check may include an Access Control Bar (AC Bar) check or a Special Service Access Control Bar (SSAC Bar) check.
For MO-Data service or MO-Signaling service, RRC connection can be initiated only after AC Bar check, thereby realizing MO-Data service or MO-Signaling service; for MO-VoLTE or MO-ViLTE Call service, the Call management module (CallManager) in the UE can be informed to initiate calling Call service only after SSAC Bar check.
The Access Control (AC) may be storing access class information in a Subscriber Identity Module (SIM) or universal Subscriber Identity card (UMTS) of the UE, defining different priority access levels of the user. Normally, a UE may be assigned one of the access levels AC 0-AC 9, and a particular high priority user may additionally be assigned one or more special access levels (AC 11-AC 15); AC 10 represents an emergency call; the AC11 is used for network operation; the AC 12 is a security service; AC 13 is a public service category, such as water, gas suppliers; AC 14 represents emergency services; AC15 represents an operator staff. A terminal may be configured as one level of AC0-9, or one or more levels of AC 11-15.
Although the existing protocol is to ensure that a high-priority user under an operator network can access the network to the maximum extent, the MO service initiated by the high-priority user may not be limited by the access barring check, for a general user, the MO service cannot pass the access barring check (which may include an AC Bar check or an SSAC Bar check), and is prohibited from accessing the cell, which affects the transmission of the calling service and the user experience.
In the related art, if the UE fails the access barring check, the UE needs to wait for a preset time period before performing the next retry in the current cell, so that the UE cannot realize the normal transmission of the MO service within the preset time period, thereby reducing the transmission rate of the MO service.
In order to solve the above problem, an embodiment of the present invention provides a cell reselection method, where when an MO service to be initiated exists in a terminal device, the method detects whether the terminal device passes an access barring check of a first cell, where the first cell is a cell in which the terminal device currently resides; if the terminal equipment does not pass the access barring check of the first cell, the terminal equipment does not attempt to initiate the MO service in the first cell within a first preset time length, and modifies the first reselection priority of the first cell into a second reselection priority, wherein the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one adjacent cell of the first cell; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection; and if the terminal equipment reselects to the second cell within the first preset time length, the terminal equipment tries to initiate the MO service in the second cell. By the scheme, before the terminal equipment initiates the calling service, if the terminal equipment is found not to pass the access prohibition check, the terminal equipment can not try to access the first cell to initiate the MO service within the first preset time length, and at this time, the terminal equipment does not need to wait for a first preset time length to retry in the first cell, the terminal device may be triggered to perform cell reselection by modifying a first reselection priority of a currently camped first cell to a second, smaller reselection priority (lower than the first reselection priority, and lower than reselection priorities of at least one neighboring cell of the first cell), and when the terminal device can reselect to the second cell within the first preset time, the terminal device can attempt to initiate the MO service in the second cell, therefore, the MO service can be transmitted in time, and the transmission rate of the MO service is improved.
The cell reselection method in the embodiment of the invention can be applied to terminal equipment. The terminal device in the embodiments of the present invention may be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, a user equipment, or the like.
The terminal device may be a Station (ST) in a WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next generation communication system such as an NR Network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) Network, and the like.
In the embodiment of the invention, the terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.).
In the embodiment of the present invention, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self driving (self driving), a wireless terminal device in remote medical treatment (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like.
By way of example, and not limitation, in embodiments of the present invention, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.
The technical scheme of the embodiment of the invention can be applied to various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an Advanced Long Term Evolution (LTE-A) System, a New Radio (NR) System, an Evolution System of an NR System, an LTE (LTE-based Access to unlicensed spectrum, an LTE-U) System on an unlicensed spectrum, an NR (NR-based Access to unlicensed spectrum, an NR-U) System on an unlicensed spectrum, a Non-Terrestrial communication network (UMTS-based network, UMTS) System, a Universal Mobile telecommunications network (UMTS) System, WLAN), Wireless Fidelity (WiFi), a fifth Generation communication (5th-Generation, 5G) system, or other communication systems, etc.
As shown in fig. 1, an application scenario diagram is shown, and the cell reselection method provided in the embodiment of the present invention may be applied in the application scenario, where a plurality of cells exist around an end device 11 for access, for example, a cell a, a cell B, a cell C, and a cell D shown in fig. 1. Assuming that at some time, the network device 12 detects that network congestion occurs in excess of terminal devices accessing the cell a, the network device may open the AC Bar or the SSAC Bar of the cell a to perform access barring check on the user of the cell a, so as to limit the user from accessing the cell a. If the terminal device 11 is camped on the cell a and wants to initiate an MO service in the cell a, the terminal device needs to check whether the MO service can be initiated through the access barring check of the cell a, and if the MO service cannot be initiated, the terminal device may modify the reselection priority of the cell a to a lower reselection priority (for example, may be the lowest reselection priority) by using the scheme provided in the embodiment of the present invention, so that the terminal device may be forcibly triggered to perform cell reselection, and if the terminal device may reselect to another cell (for example, cell B, cell C, or cell D) within the first preset time period, the terminal device may attempt to initiate the MO service in the other cell.
The cell reselection method provided by the embodiment of the invention comprises the following steps: if the RRC connection of the terminal equipment in the first cell fails to be established, the terminal equipment does not try to establish the RRC connection in the first cell within a first preset time length, and the first reselection priority of the first cell is modified into a second reselection priority; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection; the first cell is a cell where the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.
Optionally, if the terminal device does not pass the access barring check of the first cell, the RRC connection establishment in the first cell by the terminal device fails, and the terminal device does not perform a cell access attempt in the first cell within the first preset time duration any more, and forcibly triggers cell reselection by modifying the priority of the currently camped first cell.
Optionally, the cell reselection method provided in the embodiment of the present invention may be applied to a scenario in which a calling service is initiated, and may also be applied to a scenario in which a called service is received.
In a scenario of receiving a called service, when a terminal device receives the called service, if the terminal device is in an idle state, the terminal device may first receive a paging message, and attempt to establish an RRC connection after receiving the paging message, and if the RRC connection is established, the terminal device may receive the service, thereby implementing transmission of the called service.
Optionally, the failure of RRC connection establishment in the first cell by the terminal device includes:
if the terminal device attempts to initiate the MO service in the first cell and the terminal device does not pass the access barring check of the first cell, the RRC connection establishment of the terminal device in the first cell fails, and the terminal device does not attempt to initiate the MO service in the first cell within the first preset time period.
Further, after the terminal device is triggered to perform cell reselection, if the terminal device reselects to another cell within the first preset time period, the MO service may be attempted to be initiated in the other cell.
Optionally, in this embodiment of the present invention, the RRC connection establishment failure may be caused by a failure of the access barring check.
Optionally, in the embodiment of the present invention, the RRC connection establishment failure may also be caused by other reasons, for example:
(1) the terminal equipment cannot receive an RRC Connection Setup message (RRC Connection Setup) message;
(2) co-frequency interference;
for example, if there is a same-frequency same-interference scrambling code in an adjacent cell of a certain cell, a situation of RRC connection establishment failure may occur;
(3) the signal strength in the coverage area of the current cell is small. In the embodiment of the invention, if the RRC connection establishment of the terminal equipment in the first cell fails, the terminal equipment does not try to establish the RRC connection in the first cell within a first preset time length, and the first reselection priority of the first cell is modified into the second reselection priority; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection; the first cell is a cell where the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell. By this scheme, if the terminal equipment fails to establish the RRC connection in the cell where the terminal equipment currently resides, the terminal device can not try to access the first cell to initiate the calling service or receive the called service within the first preset time length, and at this time, the terminal device does not need to wait for a first preset time length to retry in the first cell, the terminal device may be triggered to perform cell reselection by modifying the first reselection priority of the currently camped first cell to a second, smaller reselection priority (lower than the first reselection priority, and lower than the reselection priority of the at least one neighboring cell of the first cell), so that it may have an opportunity to reselect to another cell, and attempting to establish RRC connection on other cells to initiate MO service or receive called service, thereby ensuring timely transmission of service and improving the transmission rate of service.
As shown in fig. 2, a cell reselection method provided in an embodiment of the present invention includes:
201. the terminal equipment has MO service to be initiated.
Wherein the terminal device may be in an RRC idle state.
In the embodiment of the present invention, for a terminal device in an RRC idle state, before initiating an MO service, it needs to detect whether to pass an access barring check of a currently camped cell. For the terminal device in the RRC connected state, the MO service can be directly initiated without detecting whether the access barring check of the currently camped cell is passed.
In the embodiment of the present invention, when an MO service to be initiated exists in a terminal device, the MO service may be attempted to be initiated on a first cell where the terminal device resides, and specific ways of attempting to initiate the MO service are as shown in following 202 to 206.
Optionally, when there is an MO service to be initiated, the terminal device may first detect whether the terminal device is in an RRC idle state, and if the terminal device is in an RRC space state, continue to execute the following method flows 202 to 206, and if the terminal device is in an RRC connected state, directly execute the following method 206.
202. And detecting whether the terminal equipment passes the access prohibition check of the first cell.
The first cell is a cell where the terminal device currently resides.
The access barring check may include: an access control barring (AC Bar) check, or a special service access control barring (SSAC Bar) check.
Optionally, in the foregoing access barring check manner, the terminal device may receive an access barring check parameter indicated by the network device, generate a random parameter by the terminal device, compare the random number with the access barring check parameter, indicate that the access barring check of the cell passes if a relationship between the random parameter and the access barring check parameter satisfies a passing condition of the access barring check, and indicate that the access barring check of the cell fails if the relationship does not satisfy the passing condition of the access barring check. For example, the network device indicates an access barring check parameter of 50%, while the terminal device generates a random parameter of 60%, 60% being greater than 50%, thus indicating an access barring check through the cell.
If the terminal device does not pass the access barring check of the first cell, executing the following steps 203 to 205; if the terminal device passes the access barring check of the first cell, the following is performed 206.
203. The terminal equipment does not initiate the MO service in the first cell within a first preset time length, and modifies the first reselection priority of the first cell into a second reselection priority.
Optionally, if the terminal device does not pass the access barring check of the first cell, the terminal device is prevented from accessing the first cell within the first preset time duration, and the performance is no longer that the first cell initiates the MO service.
Optionally, the first preset time period may be implemented by a timer. It may be determined that the terminal device does not pass the access barring check of the first cell, and a timer may be triggered to wait for an access barring time (Tbarring), after the timer expires, the terminal device may retry again, that is, it may detect whether the access barring check of the first cell passes again.
Wherein the second reselection priority is lower than the first reselection priority and the second reselection priority is lower than the reselection priority of the at least one neighboring cell of the first cell.
Optionally, the second reselection priority may be the lowest priority.
Generally, when the reselection priority of the cell in which the terminal device currently resides is lower than that of the neighboring cell (i.e., the neighboring cell of the camped cell), the UE may be triggered to perform cell reselection.
204. The terminal device performs cell reselection in response to the change in the reselection priority of the first cell.
In the embodiment of the invention, the terminal equipment modifies the first reselection priority of the first cell into the second reselection priority, can forcibly trigger the measurement of the adjacent cells of the first cell to obtain the measurement result of the adjacent cells, and selects the cell meeting the target reselection condition from the adjacent cells as the reselection cell according to the measurement result of the adjacent cells.
The neighboring cells in the embodiments of the present invention are also referred to as neighboring cells, and the like.
Optionally, for an intra-frequency cell of the first cell, the target reselection condition may include one of the following (1) and (2):
(1) satisfying the cell selection S criterion;
(2) the cell selection S-criteria are satisfied, and a duration of time for which the cell selection S-criteria are satisfied is greater than a cell reselection hysteresis time.
Optionally, the target reselection condition may include one of the following (a), (b) and (c) for the inter-frequency cell of the first cell:
(a) satisfying the cell selection S criterion;
(b) satisfying a cell selection S criterion, wherein the duration satisfying the cell selection S criterion is longer than the cell reselection hysteresis time;
(c) the cell selection S value is larger than a preset threshold, and the duration of the cell selection S value larger than the preset threshold is larger than the cell reselection delay duration.
The preset threshold may be a decision threshold (ThreshX-Low) for a Low priority inter-system reselection Universal Terrestrial Radio Access (UTRA) cell.
Optionally, a rule for performing cell reselection in the embodiment of the present invention may be the same as a reselection rule in the prior art, for example, may be the same as a reselection rule in a 3GPP communication protocol, and the reselection rule may also be set according to an actual situation.
In the embodiment of the invention, the rules for measuring the adjacent cell and selecting the reselected cell can be relaxed on the basis of the original 3GPP reselection rule to obtain the optimized reselection rule, and the cell reselection is carried out according to the optimized reselection rule.
Illustratively, a 3GPP reselection rule, as well as an optimized reselection rule, is shown in fig. 3. As shown in fig. 3, when performing cell reselection according to the optimized reselection rule, the terminal device is easier to start measuring the neighboring cell because the condition for measuring the neighboring cell is modified.
Further, when cell reselection is performed according to the optimized reselection rule, the condition for selecting the reselected cell is modified, so that the terminal device can more easily select the reselected cell from the neighboring cells.
Some of the parameters involved in fig. 3 are explained as follows:
sintrasearch: measuring threshold values of cells with the same frequency;
selection: a cell reselection hysteresis time (also referred to as a cell reselection timer time; a cell reselection hysteresis time; a cell reselection evaluation time);
snonintrasearch: a measurement threshold value of a pilot frequency cell;
ThreshServing-Low: a low-priority different system reselects a service cell judgment threshold;
ThreshX-Low: and the low-priority inter-system reselection Universal Terrestrial Radio Access (UTRA) cell decision threshold.
In the embodiment of the present invention, the S criterion is a cell selection S criterion, the S value is a cell selection S value, and the access criterion condition of the resident cell meets the cell selection S criterion, which is specifically as follows:
Srxlev＞0；
Srxlev＝Qrxlevmeas-(Qrxlevmin+Qrxlevminoffset)-Pcompensation；
pcompensation ═ max (PMax-UE Maximum output, 0). Wherein, the meaning of each parameter is as follows:
1. srxlev: selecting the S value in dB by the cell;
2. qrxlevmeas, the RSRP value of the measuring cell, unit dBm;
3. qrxlevmin, cell minimum received level, unit dBm (this parameter may affect user access);
4. qrxlevminooffset: reducing ping-pong selections between Public Land Mobile Networks (PLMNs), the parameter being used only when a terminal device is camped on a visited PLMN, periodically searching for a higher level PLMN;
5. PMax: the maximum uplink transmission power allowed by the terminal equipment in the cell;
6. UE Maximum Outpower: maximum uplink transmit power determined by the terminal device capabilities.
205. And if the terminal equipment reselects to the second cell within the first preset time length, the terminal equipment tries to initiate the MO service in the second cell.
The second cell may be a cell that is determined to satisfy the target reselection condition from among neighboring cells of the first cell.
Optionally, when there are multiple cells satisfying the target reselection condition in neighboring cells of the first cell, the second cell may be any one of the multiple cells satisfying the target reselection condition.
Optionally, when there are multiple cells that satisfy the target reselection condition in the neighboring cells of the first cell, the second cell may also be a cell with the highest reselection priority among the multiple cells that satisfy the target reselection condition.
It should be noted that, similarly to the case of attempting to initiate the MO service in the first cell, the second cell attempts to initiate the MO service, and details thereof are not repeated here.
206. The terminal equipment initiates the MO service in the first cell.
In the embodiment of the invention, when the MO service to be initiated exists in the terminal equipment, whether the terminal equipment passes the access prohibition check of a first cell is detected, wherein the first cell is a cell in which the terminal equipment currently resides; if the terminal equipment does not pass the access barring check of the first cell, the terminal equipment does not attempt to initiate the MO service in the first cell within a first preset time length, and modifies the first reselection priority of the first cell into a second reselection priority, wherein the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one adjacent cell of the first cell; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection; and if the terminal equipment reselects to the second cell within the first preset time length, the terminal equipment tries to initiate the MO service in the second cell. By the scheme, before the terminal equipment initiates the calling service, if the terminal equipment is found not to pass the access prohibition check, the terminal equipment can not try to access the first cell to initiate the MO service within the first preset time length, and at this time, the terminal equipment does not need to wait for a first preset time length to retry in the first cell, the terminal device may be triggered to perform cell reselection by modifying a first reselection priority of a currently camped first cell to a second, smaller reselection priority (lower than the first reselection priority, and lower than reselection priorities of at least one neighboring cell of the first cell), and when the terminal device can reselect to the second cell within the first preset time, the terminal device can attempt to initiate the MO service in the second cell, therefore, the MO service can be transmitted in time, and the transmission rate of the MO service is improved.
In addition, before the terminal device initiates the calling service, if the terminal device is found to pass the access barring check, the MO service can be directly initiated on the cell where the terminal device resides currently.
Optionally, after the terminal device modifies the first reselection priority of the first cell to the second reselection priority, if the terminal device does not reselect any cell after the first preset time period, the terminal device may detect whether the terminal device passes through the access barring check of the first cell again, so as to attempt to initiate an MO service in the first cell.
That is, after modifying the reselection priority of the first cell, if the terminal device does not reselect a cell that can be accessed, the terminal device may attempt to initiate the MO service again in the camped first cell. For example, it may be checked again whether the terminal device passes the access barring check of the first cell.
Optionally, after the terminal device modifies the first reselection priority of the first cell to the second reselection priority, and after a first preset time, modifies the second reselection priority of the first cell to the first reselection priority.
In the embodiment of the invention, after the first preset time, the reselection priority of the first cell is recovered, so that unnecessary reselection processes caused subsequently can be avoided.
As shown in fig. 4, an embodiment of the present invention provides a terminal device, where the terminal device includes:
a processing module 401, configured to, if the RRC connection establishment in the first cell by the terminal device fails, the terminal device does not attempt to establish the RRC connection in the first cell within a first preset time duration, and modifies a first reselection priority of the first cell to a second reselection priority; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection;
the first cell is a cell where the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.
Optionally, if the terminal device fails the access barring check of the first cell, the terminal device fails to establish the RRC connection in the first cell.
Optionally, if the terminal device attempts to initiate the MO service in the first cell and the terminal device does not pass the access barring check of the first cell, the RRC connection establishment of the terminal device in the first cell fails;
the processing module 401 is further configured to, within the first preset time duration, the terminal device does not attempt to initiate the MO service in the first cell.
Optionally, the second reselection priority is the lowest priority.
The processing module 401 is further configured to, after performing cell reselection, if the terminal device reselects to the second cell within the first preset time duration, attempt to initiate an MO service in the second cell.
The processing module 401 is further configured to, after performing cell reselection, if the terminal device does not reselect any cell after the first preset time period, try to initiate an MO service in the first cell again.
Optionally, the processing module 401 is specifically configured to measure, in response to a change of the reselection priority of the first cell, a neighboring cell of the first cell, and obtain a measurement result of the neighboring cell;
selecting a cell meeting a target reselection condition from the adjacent cells as a reselection cell according to the measurement result of the adjacent cells;
optionally, for a co-frequency cell of the first cell, the target reselection condition includes:
satisfying the cell selection S criterion;
alternatively, the first and second electrodes may be,
the cell selection S-criteria are satisfied, and a duration of time for which the cell selection S-criteria are satisfied is greater than a cell reselection hysteresis time.
Optionally, for the inter-frequency cell of the first cell, the target reselection condition includes:
satisfying the cell selection S criterion;
alternatively, the first and second electrodes may be,
satisfying a cell selection S criterion, wherein the duration satisfying the cell selection S criterion is longer than the cell reselection hysteresis time;
alternatively, the first and second electrodes may be,
the cell selection S value is larger than a preset threshold, and the duration of the cell selection S value larger than the preset threshold is larger than the cell reselection delay duration.
Optionally, the processing module 401 is further configured to modify the first reselection priority of the first cell into a second reselection priority, and then modify the second reselection priority of the first cell into the first reselection priority after a first preset time.
Optionally, the access barring check includes: access control barring check, or, special service access control barring check.
An embodiment of the present invention provides a terminal device, where the terminal device includes:
a memory storing executable program code;
a processor coupled to the memory;
the processor calls the executable program code stored in the memory to execute the cell reselection method executed by the terminal device in each method embodiment.
The terminal device in the embodiment of the present invention may be a mobile phone, and as shown in fig. 5, for example, the mobile phone may include: radio Frequency (RF) circuit 55, memory 520, input unit 530, display unit 540, sensor 550, audio circuit 560, wireless fidelity (WiFi) module 570, processor 580, and power supply 590. Therein, the radio frequency circuit 510 includes a receiver 511 and a transmitter 512. Those skilled in the art will appreciate that the handset configuration shown in fig. 5 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
RF circuit 510 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, for processing downlink information of a base station after receiving the downlink information to processor 580; in addition, the data for designing uplink is transmitted to the base station. In general, RF circuit 510 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, RF circuit 510 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to global system for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), etc.
The memory 520 may be used to store software programs and modules, and the processor 580 executes various functional applications and data processing of the mobile phone by operating the software programs and modules stored in the memory 520. The memory 520 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 520 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The input unit 530 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. Specifically, the input unit 530 may include a touch panel 531 and other input devices 532. The touch panel 531, also called a touch screen, can collect touch operations of a user on or near the touch panel 531 (for example, operations of the user on or near the touch panel 531 by using any suitable object or accessory such as a finger or a stylus pen), and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 531 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor 580, and can receive and execute commands sent by the processor 580. In addition, the touch panel 531 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 530 may include other input devices 532 in addition to the touch panel 531. In particular, other input devices 532 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 540 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 540 may include a display panel 541, and optionally, the display panel 541 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-Emitting diode (OLED), or the like. Further, the touch panel 531 may cover the display panel 541, and when the touch panel 531 detects a touch operation on or near the touch panel 531, the touch panel is transmitted to the processor 580 to determine the type of the touch event, and then the processor 580 provides a corresponding visual output on the display panel 541 according to the type of the touch event. Although the touch panel 531 and the display panel 541 are shown as two separate components in fig. 5 to implement the input and output functions of the mobile phone, in some embodiments, the touch panel 531 and the display panel 541 may be integrated to implement the input and output functions of the mobile phone.
The handset may also include at least one sensor 550, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 541 according to the brightness of ambient light, and the proximity sensor may turn off the display panel 541 and/or the backlight when the mobile phone is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here. In the embodiment of the present invention, the terminal device may include an acceleration sensor, a depth sensor, a distance sensor, or the like.
Audio circuitry 560, speaker 561, and microphone 562 may provide an audio interface between a user and a cell phone. The audio circuit 560 may transmit the electrical signal converted from the received audio data to the speaker 561, and convert the electrical signal into a sound signal by the speaker 561 for output; on the other hand, the microphone 562 converts the collected sound signals into electrical signals, which are received by the audio circuit 560 and converted into audio data, which are then processed by the audio data output processor 580, and then passed through the RF circuit 510 to be sent to, for example, another cellular phone, or output to the memory 520 for further processing.
WiFi belongs to short distance wireless transmission technology, and the mobile phone can help the user to send and receive e-mail, browse web pages, access streaming media, etc. through the WiFi module 570, which provides wireless broadband internet access for the user. Although fig. 5 shows the WiFi module 570, it is understood that it does not belong to the essential constitution of the handset, and can be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 580 is a control center of the mobile phone, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 520 and calling data stored in the memory 520, thereby performing overall monitoring of the mobile phone. Alternatively, processor 580 may include one or more processing units; preferably, the processor 580 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 580.
The handset also includes a power supply 590 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 580 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption. Although not shown, the mobile phone may further include a camera, a bluetooth module, etc., which are not described herein.
In an embodiment of the invention, processor 580 is configured to
A processor 580, configured to, if the RRC connection establishment in the first cell by the terminal device fails, the terminal device does not attempt to establish the RRC connection in the first cell within a first preset time duration, and modifies the first reselection priority of the first cell to the second reselection priority; in response to a change in the reselection priority of the first cell, the terminal device performs cell reselection;
the first cell is a cell where the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.
Optionally, if the terminal device fails the access barring check of the first cell, the terminal device fails to establish the RRC connection in the first cell.
Optionally, if the terminal device attempts to initiate the MO service in the first cell and the terminal device does not pass the access barring check of the first cell, the RRC connection establishment of the terminal device in the first cell fails;
the processor 580 is further configured to not attempt, by the terminal device, to initiate the MO service in the first cell within the first preset time duration.
Optionally, the second reselection priority is the lowest priority.
The processor 580 is further configured to, after performing cell reselection, if the terminal device reselects to the second cell within the first preset time duration, attempt to initiate an MO service in the second cell.
The processor 580 is further configured to, after performing cell reselection, if the terminal device does not reselect any cell after the first preset time duration, try to initiate an MO service in the first cell again.
Optionally, the processor 580 is specifically configured to, in response to a change in reselection priority of the first cell, measure a neighboring cell of the first cell to obtain a measurement result of the neighboring cell;
and selecting a cell meeting the target reselection condition from the adjacent cells as a reselection cell according to the measurement result of the adjacent cells.
Optionally, for a co-frequency cell of the first cell, the target reselection condition includes:
satisfying the cell selection S criterion;
alternatively, the first and second electrodes may be,
the cell selection S-criteria are satisfied, and a duration of time for which the cell selection S-criteria are satisfied is greater than a cell reselection hysteresis time.
Optionally, for the inter-frequency cell of the first cell, the target reselection condition includes:
satisfying the cell selection S criterion;
alternatively, the first and second electrodes may be,
satisfying a cell selection S criterion, wherein the duration satisfying the cell selection S criterion is longer than the cell reselection hysteresis time;
alternatively, the first and second electrodes may be,
the cell selection S value is larger than a preset threshold, and the duration of the cell selection S value larger than the preset threshold is larger than the cell reselection delay duration.
Optionally, the processor 580 is further configured to modify the second reselection priority of the first cell to the first reselection priority after the first preset time duration after the first reselection priority of the first cell is modified to the second reselection priority.
Optionally, the access barring check includes: access control barring check, or, special service access control barring check.
Embodiments of the present invention also provide a computer program product, wherein the computer program product, when run on a computer, causes the computer to perform some or all of the steps of the method as in the above method embodiments.
Embodiments of the present invention further provide an application publishing platform, where the application publishing platform is configured to publish a computer program product, where the computer program product, when running on a computer, causes the computer to perform some or all of the steps of the method in the above method embodiments.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are exemplary and alternative embodiments, and that the acts and modules illustrated are not required in order to practice the invention.
The terminal device provided by the embodiment of the present invention can implement each process shown in the above method embodiments, and is not described herein again to avoid repetition.
In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not imply an inevitable order of execution, and the execution order of the processes should be determined by their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated units, if implemented as software functional units and sold or used as a stand-alone product, may be stored in a computer accessible memory. Based on such understanding, the technical solution of the present invention, which is a part of or contributes to the prior art in essence, or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several requests for causing a computer device (which may be a personal computer, a server, a network device, or the like, and may specifically be a processor in the computer device) to execute part or all of the steps of the above-described method of each embodiment of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by hardware instructions of a program, and the program may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM), or other Memory, such as a magnetic disk, or a combination thereof, A tape memory, or any other medium readable by a computer that can be used to carry or store data.

Claims (14)

1. A cell reselection method is applicable to a terminal device, and is characterized by comprising the following steps:
if the RRC connection of the terminal equipment in the first cell fails to be established, the terminal equipment does not attempt to establish the RRC connection in the first cell within a first preset time length, and the first reselection priority of the first cell is modified into a second reselection priority;
in response to a change in reselection priority of the first cell, the terminal device performing cell reselection;
the first cell is a cell in which the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.
2. The method of claim 1, wherein the terminal device fails to establish the RRC connection in the first cell, and wherein the method comprises:
and if the terminal equipment does not pass the access prohibition check of the first cell, the terminal equipment fails to establish the RRC connection in the first cell.
3. The method of claim 2, wherein the terminal device fails to establish the RRC connection in the first cell, and wherein the method comprises:
if the terminal equipment tries to initiate the MO service in the first cell and the terminal equipment does not pass the access prohibition check of the first cell, the RRC connection establishment of the terminal equipment in the first cell fails;
the method further comprises the following steps:
and the terminal equipment does not attempt to initiate the MO service in the first cell within the first preset time length.
4. The method of claim 3, wherein after the terminal device performs cell reselection, the method further comprises: and if the terminal equipment reselects to a second cell within the first preset time length, attempting to initiate the MO service in the second cell.
5. The method of claim 3, wherein after the terminal device performs cell reselection, the method further comprises:
and if the terminal equipment does not reselect any cell after the first preset time length, trying to initiate the MO service in the first cell again.
6. The method of claim 1, wherein the performing, by the terminal device, cell reselection in response to the change in the reselection priority of the first cell comprises:
measuring a neighboring cell of the first cell in response to the change of the reselection priority of the first cell, resulting in a measurement result of the neighboring cell;
and selecting a cell meeting a target reselection condition from the adjacent cells as a reselection cell according to the measurement result of the adjacent cells.
7. The method of claim 6, wherein the target reselection condition comprises, for an intra-frequency cell of the first cell:
satisfying the cell selection S criterion;
alternatively, the first and second electrodes may be,
the cell selection S-criteria are satisfied, and a duration of time for which the cell selection S-criteria are satisfied is greater than a cell reselection hysteresis time.
8. The method of claim 6, wherein the target reselection condition comprises, for an inter-frequency cell of the first cell:
satisfying the cell selection S criterion;
alternatively, the first and second electrodes may be,
satisfying a cell selection S criterion, wherein the duration satisfying the cell selection S criterion is longer than the cell reselection hysteresis time;
alternatively, the first and second electrodes may be,
the cell selection S value is larger than a preset threshold, and the duration of the cell selection S value larger than the preset threshold is larger than the cell reselection delay duration.
9. The method of claim 1, wherein after the terminal device modifies the first reselection priority of the first cell to the second reselection priority, the method further comprises:
modifying the second reselection priority of the first cell to the first reselection priority after a first preset duration.
10. The method of claim 2, wherein the access barring check comprises: access control barring check, or, special service access control barring check.
11. The method of any of claims 1 to 10, wherein the second reselection priority is the lowest priority.
12. A terminal device, comprising:
the processing module is configured to, if the RRC connection establishment of the terminal device in the first cell fails, not attempt to establish the RRC connection in the first cell by the terminal device within a first preset time period, and modify a first reselection priority of the first cell to a second reselection priority; in response to a change in reselection priority of the first cell, the terminal device performing cell reselection;
the first cell is a cell in which the terminal device currently resides, the second reselection priority is lower than the first reselection priority, and the second reselection priority is lower than the reselection priority of at least one neighboring cell of the first cell.
13. A terminal device, comprising:
a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing a cell reselection method as claimed in any of claims 1 to 11.
14. A computer-readable storage medium, comprising: computer instructions which, when run on a computer, cause the computer to perform the cell reselection method of any of claims 1 to 11.
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