CN113784434A - Communication method, device and terminal equipment - Google Patents
Communication method, device and terminal equipment Download PDFInfo
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- CN113784434A CN113784434A CN202111005628.7A CN202111005628A CN113784434A CN 113784434 A CN113784434 A CN 113784434A CN 202111005628 A CN202111005628 A CN 202111005628A CN 113784434 A CN113784434 A CN 113784434A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
Abstract
The application discloses a communication method, a communication device and terminal equipment. When the connection establishment of the terminal equipment fails, the connection establishment process can be initiated again according to the trial waiting time of the terminal equipment and/or the connection establishment trial times of the terminal equipment. By the method, the terminal equipment adopts a 'waiting' mechanism and a 'retrying' mechanism, so that the success rate of the connection establishment can be effectively increased, the connection establishment is triggered without depending on new data transmission or new paging information, and the service delay is effectively reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication method, an apparatus, and a terminal device.
Background
With the rapid development of the technology of the internet of things, after a large number of terminals of the internet of things appear, due to the limitation of network capacity and the access principle (e.g., communication method) of wireless communication, it is expected that access rejection caused by network congestion and connection establishment failure with the network caused by access collision will occur. For example, a terminal in the internet of things actively initiates connection establishment with a network and data transmission by initiating a random access process. When the terminal connection establishment fails, the terminal terminates the connection establishment procedure as described in the 3GPP specification. The terminal waits for the network to issue a new page and then initiates a new connection establishment request again. However, this approach may result in too long service delay or service failure, which affects the user experience.
Disclosure of Invention
The embodiment of the application provides a communication method, a communication device and terminal equipment, when the connection establishment between a terminal and a network fails, the method can initiate a connection establishment process again according to the trial waiting time of the terminal equipment and/or the connection establishment trial times of the terminal equipment, and the service delay is favorably reduced.
In a first aspect, an embodiment of the present application provides a communication method, where the method is performed by a terminal device. The method comprises the following steps: the terminal equipment initiates a connection establishment procedure, wherein the connection establishment procedure comprises a connection establishment procedure triggered based on a paging message from the first cell and/or a connection establishment procedure initiated based on uplink data transmission. And when the connection establishment of the terminal equipment fails, initiating the connection establishment flow again according to the attempt waiting time of the terminal equipment and/or the connection establishment attempt times of the terminal equipment. By the method, under the scenes of access failure and access rejection of the terminal equipment caused by the network congestion problem, the terminal equipment can quickly establish connection with the network and a data link, and the service delay is favorably reduced.
In an optional implementation manner, when there is uplink data to be sent by the terminal device or the terminal device receives a paging message from the first cell, a connection establishment request message is sent to the first cell, and the number of connection establishment attempts of the terminal device is updated.
In an optional implementation manner, when the connection establishment of the terminal device fails and the connection establishment attempt number of the terminal device is greater than the attempt number threshold, the first cell is added to a blacklist, and a storage time threshold of the first cell in the blacklist is set. Optionally, the terminal device requests to camp on the second cell.
In an optional implementation manner, when the reason of the connection establishment failure of the terminal device is that non-access is forbidden and the connection establishment attempt number of the terminal device is less than or equal to the attempt number threshold, the attempt waiting time of the terminal device is recorded. And when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment flow to the first cell again.
In an optional implementation manner, when the reason of the connection establishment failure of the terminal device is that access is forbidden and the connection establishment attempt number of the terminal device is less than or equal to the attempt number threshold, the forbidden time of the terminal device is recorded. And when the forbidden time of the terminal equipment is greater than the forbidden time threshold, adding the first cell into a blacklist, and setting a storage time threshold of the first cell in the blacklist. And initiating a connection establishment process to the second cell.
In an alternative embodiment, when the forbidden time of the terminal device is less than or equal to the forbidden time threshold, the trial waiting time of the terminal device is recorded, and the trial waiting time threshold is set according to the forbidden time of the terminal device. And when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment flow to the first cell again.
In an optional implementation manner, when the storage time of the first cell in the blacklist is greater than the storage time threshold of the first cell in the blacklist, the first cell is removed from the blacklist, and the first cell is requested to camp on.
In an alternative embodiment, the attempt waiting time of the terminal device and/or the number of connection establishment attempts of the terminal device are determined according to the service type of the terminal device.
In a second aspect, an embodiment of the present application provides a communication apparatus, which includes a transceiver unit. The receiving and sending unit is configured to initiate a connection establishment procedure, where the connection establishment procedure includes a connection establishment procedure triggered based on a paging message from the first cell and/or a connection establishment procedure initiated based on uplink data transmission. The transceiving unit is further configured to initiate a connection establishment procedure again according to the attempt waiting time of the terminal device and/or the number of connection establishment attempts of the terminal device when the connection establishment of the terminal device fails.
In addition, other alternative embodiments of the communication device provided in the second aspect can be found in the related contents of the first aspect, and are not described in detail here.
In a third aspect, an embodiment of the present application provides a terminal device, which includes a processor and a memory, where the processor and the memory are connected to each other. Wherein the memory is configured to store a computer program comprising program instructions and the processor is configured to invoke the program instructions to perform the method of the first aspect and any one of its alternative embodiments.
In a fourth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a data interface, and the processor reads instructions stored in a memory through the data interface to execute the method in the first aspect and any optional implementation manner thereof.
In a fifth aspect, an embodiment of the present application provides a chip module, which includes the chip as provided in the fourth aspect.
In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium. The computer program comprises program instructions which, when executed by the processor, cause the processor to perform the method as in the first aspect and any one of its alternative embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application;
fig. 3 is a flowchart illustrating an application embodiment of a communication method according to an embodiment of the present application;
fig. 4 is a schematic diagram of a communication device according to an embodiment of the present application;
fig. 5 is a schematic diagram of a terminal device according to an embodiment of the present application.
Detailed Description
The technical solution in the embodiments of the present application will be explained below with reference to the drawings in the embodiments of the present application.
It should be noted that, in the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and further, where similarly-named elements, features, or elements in different embodiments of the disclosure may have the same meaning, or may have different meanings, that particular meaning should be determined by their interpretation in the embodiment or further by context with the embodiment.
It should be understood that, in the embodiment of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.
It should be understood that the appearance of "a plurality" in the embodiments of the present application means two or more.
It should be understood that, in the embodiments of the present application, the descriptions of the first, the second, etc. are only used for illustrating and differentiating the description objects, and the descriptions are not in sequence, and do not represent the special limitation of the number of the devices in the embodiments of the present application, and cannot constitute any limitation to the embodiments of the present application.
It should be understood that, in the embodiment of the present application, the occurrence of "connection" refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, and this is not limited in this embodiment of the present application.
It should be understood that, in this embodiment of the present application, a unidirectional communication link from a terminal device to a cell is defined as an uplink, data transmitted on the uplink is uplink data, and a transmission direction of the uplink data is referred to as an uplink direction. A unidirectional communication link from a cell to a terminal device is defined as a downlink, data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called as a downlink direction.
Along with the rapid development of the internet of things technology, various internet of things terminals integrated with communication modules are integrated into the aspects of our lives, and great convenience is brought to our daily lives and trips. For example, the service types implemented by the existing internet of things terminal may include, but are not limited to, the following two types:
the service type I: when downlink data are sent to the terminal of the Internet of things by the server, the terminal of the Internet of things receives paging first, initiates establishment of network connection, and then establishes an uplink and a downlink, so that data interaction between the terminal of the Internet of things and the server is realized.
And the service type II: when uplink data are sent to the server by the Internet of things terminal, the Internet of things terminal actively initiates communication with the server. For example, the internet of things terminal completes the establishment of network connection and the establishment of a data link by initiating a random access process, thereby realizing data interaction between the internet of things terminal and the server.
However, after a large number of terminals of the internet of things are present, due to the limitation of network capacity and the access principle (e.g., communication method) of wireless communication, it is expected that access rejection due to network congestion and connection establishment failure with the network due to access collision may occur. For example, a terminal in the internet of things actively initiates connection establishment with a network and data transmission by initiating a random access process. When the terminal connection establishment fails, the terminal terminates the connection establishment procedure as described in the 3GPP specification. The terminal waits for the network to issue a new page and then initiates a new connection establishment request again. However, this approach may result in too long service delay or service failure, which affects the user experience.
In order to solve the above problem, an embodiment of the present application provides a communication method, where the communication method is applied in a scenario where connection establishment between a terminal device and a network fails. The method can initiate the connection establishment flow again according to the trial waiting time of the terminal equipment and/or the connection establishment trial number of the terminal equipment, and is beneficial to reducing the service delay.
The communication method provided by the embodiment of the application can be applied to a third generation mobile communication (3th generation, 3G) system and a fourth generation mobile communication (4)thgeneration, 4G) system, and can also be applied to fifth generation mobile communication (5)thgeneration, 5G) system, which may also be referred to as New Radio (NR) system, or sixth generation mobile communication (6)thgeneration, 6G) or other future communication systems. The technical solution of the present application is also applicable to different network architectures, including but not limited to a relay network architecture, a Vehicle-to-any-object communication (Vehicle-to-event) architecture.
For example, fig. 1 is a schematic diagram of a communication system provided in an embodiment of the present application, where the communication system includes a network device and a terminal device. The connection establishment between the network device and the terminal device includes establishing an uplink/downlink communication link between the network device and the terminal device, as shown in fig. 1. It should be noted that fig. 1 only shows one network device and three terminal devices, which is only an example, and the communication system may also include other multiple network devices and terminal devices, and is not limited herein.
In the embodiment of the present application, a terminal device may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber Station, a Mobile Station (MS), a remote Station, a remote terminal, a Mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a 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 5G Network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which is not limited in this embodiment.
The following is a description of the related terms related to the embodiments of the present application.
1. The "wait" and "retry" mechanisms: when the connection establishment between the terminal device and the network fails, the terminal device may not immediately initiate a new connection establishment procedure, but may wait for a period of time and initiate a connection establishment procedure to the same network again.
2. Trial waiting time (T-Retry) of terminal device: in the embodiment of the present application, the terminal device uses "waiting" and "retry" mechanisms, and the terminal device may wait for a period of time and then try to establish a connection with the network again, where the period of time is referred to as an attempt waiting time of the terminal device.
3. Trial wait time threshold (T-Max-Retry): i.e. the maximum trial waiting time of the terminal device for the same service. Wherein the attempt waiting time threshold is determined according to the forbidden time of the terminal device when the terminal device is forbidden to access and the forbidden time is less than the forbidden time threshold.
4. Number of connection establishment attempts of terminal device (C-TryCounter): when the terminal equipment initiates a connection establishment flow to the network, the terminal equipment records one time of flow execution every time, and the time is the connection establishment attempt time of the terminal equipment. In the embodiment of the present application, the terminal device employs a "waiting" mechanism and a "retry" mechanism, and the connection establishment attempt times of the terminal device include the first time of initiating a connection establishment procedure by the terminal device and the retry times of the terminal device.
5. Number of attempts threshold (N-Max-Retry): i.e. the maximum number of attempts by the terminal device for the same service. In the embodiment of the present application, when the number of connection establishment attempts of the terminal device is limited to reach the maximum number of attempts of the terminal device, the terminal device will not perform connection establishment attempts of the same service any more.
6. Forbidden time (T-Access barred-Length) of terminal equipment: when the terminal device initiates the connection establishment procedure but access is forbidden, the terminal device calculates the forbidden time of the terminal device. The forbidden time of the terminal device is determined by the network device, and the specific implementation manner refers to the description in the following embodiments.
7. Forbidden time Threshold (T-Access barred-Threshold): that is, when the terminal device requests to access a cell, access is forbidden, and the cell is set by the terminal device for the maximum value of the forbidden time of the terminal device.
8. Cell retention time on BlackList (T-BlackList-Length): when the access forbidden time of the terminal equipment is larger than the forbidden time threshold, the terminal equipment adds the cell with the forbidden access into a blacklist (namely, the terminal equipment does not try to access the cell any more), and records the storage time of the cell in the blacklist.
9. A cell retention time Threshold on the BlackList (T-BlackList-Threshold): i.e. the maximum value of the time for which the cell is kept in the black list, is set by the terminal device.
Fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application. The communication method is executed by the terminal equipment and comprises the following steps:
201, the terminal device initiates a connection establishment procedure.
In the embodiment of the present application, a connection establishment procedure initiated by a terminal device includes, but is not limited to, the following two scenarios:
scene one: a connection establishment procedure triggered based on a paging message from the first cell.
When the network needs to send downlink data to the terminal device, the network may send a paging message to the terminal device first, where the paging message is used to trigger the terminal device to initiate a connection establishment procedure. For example, the terminal device receives the paging message, and if the paging message carries the identifier of the terminal device, the terminal device may initiate a connection establishment procedure according to the paging message.
Scene two: a connection establishment procedure initiated based on the uplink data transmission.
When the terminal device needs to send uplink data, the terminal device can actively initiate communication with the network device. For example, when the terminal device needs to send uplink data, the terminal device may initiate a random access procedure to the first cell. The terminal device can access the first cell through a random access process.
In one possible implementation, when the terminal device receives a paging message from the first cell or when there is uplink data to be sent by the terminal device, the terminal device sends a connection establishment request message to the first cell, where the connection establishment request message is used for requesting establishment of a connection and a communication link (including an uplink and a downlink) with the first cell. If the terminal equipment receives the connection establishment response message and the connection establishment response message indicates that the connection establishment is successful, the terminal equipment determines that the connection establishment is successful and establishes an uplink and a downlink.
In a possible implementation manner, when the terminal device initiates a connection establishment procedure, the terminal device will update the connection establishment attempt number of the terminal device. That is, the number of connection establishment attempts of the terminal device will increase once every time the terminal device initiates the connection establishment procedure. For example, the terminal device may set an attempt number counter C-TryCounter that records zero times (i.e., initializes C-TryCounter ═ 0). The number of times recorded by the number of attempts counter C-TryCounter will be incremented by one each time the terminal device initiates a connection establishment procedure. For example, after the terminal device initiates the connection establishment procedure for the first time, the number of times recorded by the number-of-attempts counter C-TryCounter is incremented by one, that is, the terminal device updates C-TryCounter to 1. If the terminal device fails to establish the connection for the first time and the terminal device initiates the connection establishment procedure again, the number of times recorded by the trial number counter C-TryCounter is increased by one again, that is, the terminal device updates C-TryCounter to 2.
202, when the connection establishment of the terminal equipment fails, initiating the connection establishment flow again according to the trial waiting time of the terminal equipment and/or the connection establishment trial number of the terminal equipment.
The terminal device connection establishment failure includes but is not limited to the following situations:
the first condition is as follows: the connection setup with the network fails due to the terminal device access being disabled. The forbidden access of the terminal equipment means that the terminal equipment is not allowed to access the specified cell. For example, the network sets that the first cell does not allow the terminal device with the lower access level to access, and the terminal device with the lower access level requests to access the first cell, and then the access is forbidden.
Case two: the connection setup with the network fails due to terminal device access failure (non-access is disabled). The access failure includes an access failure in a random access process initiated by the terminal device actively, an access failure in an access process triggered by the terminal device based on the paging message, and the like.
Under the above condition, the terminal device determines whether to continue initiating the connection establishment procedure to the first cell according to the reason for the connection establishment failure of the terminal device, the attempt waiting time of the terminal device, and the connection establishment attempt times of the terminal device. Wherein, the trial waiting time of the terminal equipment and/or the connection establishment trial number of the terminal equipment are determined according to the service type of the terminal equipment. For example, the attempt waiting time of the terminal device may be specifically set according to the "forbidden time" carried in the network rejection message or according to a service model, so as to achieve the balance between power consumption and service delay. Specifically, when the length of the attempt waiting time set by the terminal device is shorter, that is, the number of connection establishment attempts of the terminal device is increased, power consumption is increased, but the service delay is shorter. When the length of the waiting time for the attempt set by the terminal device is longer, that is, the number of connection establishment attempts of the terminal device is reduced, the power consumption can be reduced, but the service delay is longer.
In a possible implementation manner, when the connection establishment of the terminal equipment fails and the connection establishment attempt times of the terminal equipment are greater than the attempt time threshold, the terminal equipment adds the first cell into a blacklist and sets a storage time threshold of the first cell in the blacklist; and requesting to camp on the second cell.
That is, when the connection establishment of the terminal device fails and the connection establishment attempt number of the terminal device is greater than the attempt number threshold, the terminal device will not continue to initiate the connection establishment procedure to the first cell, add the first cell to the blacklist, and reselect another cell (e.g., the second cell) for camping. When the terminal device adds the first cell to the blacklist, a storage time threshold of the first cell in the blacklist needs to be set. For example, the terminal device may set a time threshold for the first cell to be kept on the blacklist according to the quality of the signal received from the first cell. When the received signal quality from the first cell is high, the storage time of the first cell in the blacklist is set to be short, that is, the first cell can provide service for the terminal device again after a short time. When the received signal quality from the first cell is poor, the first cell is set to be stored in the blacklist for a longer time, namely, the terminal equipment preferentially selects to attempt to provide service through other cells.
For example, table 1 is a blacklist of a terminal device provided in an embodiment of the present application. The blacklist list comprises cell identifications added into the blacklist, the storage time of the cells in the blacklist and a corresponding storage time threshold value.
Table 1: blacklist of terminal equipment
When the first cell is added into the blacklist, the terminal device continuously records the storage time of the first cell in the blacklist.
Optionally, when the storage time of the first cell in the blacklist is greater than the storage time threshold of the first cell in the blacklist, the terminal device removes the blacklist from the first cell. In this case, the terminal device may attempt to camp back on the first cell.
In one possible implementation, when the reason of the connection establishment failure of the terminal device is that non-access is forbidden and the connection establishment attempt number of the terminal device is less than or equal to the attempt number threshold, the terminal device records the attempt waiting time. And when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, the terminal equipment initiates the connection establishment flow to the first cell again.
When the reason of the connection establishment failure of the terminal equipment is that non-access is forbidden, the terminal equipment records the waiting time of the attempt. For example, the terminal device sets an attempt wait timer T-Retry, and sets the length of time of T-Retry (i.e., sets the attempt wait time threshold). The time length of the T-Retry can be set according to the actual scene, for example, the terminal device can set the time length of the T-Retry according to a predefined value. And after the T-Retry is overtime, the terminal equipment can initiate the connection establishment flow to the first cell again. When the terminal device initiates the connection establishment procedure to the first cell again, the terminal device will update the number of connection establishment attempts of the terminal device (e.g., C-TryCounter + 1).
In one possible implementation, when the reason for the connection establishment failure of the terminal device is that access is forbidden and the number of connection establishment attempts of the terminal device is less than or equal to the threshold number of attempts, the terminal device records the forbidden time. And when the forbidden time of the terminal equipment is greater than the forbidden time threshold, the terminal equipment adds the first cell into a blacklist and sets a storage time threshold of the first cell in the blacklist. The terminal device will attempt to camp on the second cell and initiate a connection establishment request in the second cell.
When the reason of the connection establishment failure of the terminal equipment is that the access is forbidden and the connection establishment attempt number of the terminal equipment is less than or equal to the attempt number threshold, the terminal equipment records the forbidden time (T-access barred-Length). The calculation method of T-Access barred-Length can include, but is not limited to, the following two methods:
the method comprises the following steps: if the reason why the access of the terminal device is forbidden is that the access is rejected by the network, for example, the terminal device receives an RRC Connection Reject message from the network device, and the terminal device may calculate T-access barred-Length according to the RRC Connection Reject message. Wherein the RRC Connection Reject message carries a wait time field indicating that no access can be initiated within the time period indicated by the terminal wait time field. The terminal device determines the prohibited time to be the time period indicated by the wait time field, i.e., T-access barred-Length ═ wait time.
The second method comprises the following steps: if the reason for Access prohibition of the terminal device is Access Barred in the system message, the Access Barred is used for indicating that the terminal device cannot initiate any Access within the time T305. Where T305 is broadcast in a system message. The terminal device determines the forbidden time to be T305 time broadcasted in the system message, i.e. T-access barred-Length ═ T305.
Through the method, the terminal equipment can determine the access forbidden time. And when the access forbidden time of the terminal equipment is greater than the forbidden time threshold, the terminal equipment adds the first cell into the blacklist and sets the storage time threshold of the first cell in the blacklist. In a specific embodiment, reference is made to the description of the step of adding the first cell to the blacklist and setting the storage time threshold of the first cell in the blacklist in the terminal device in the foregoing embodiment, which is not described herein again.
After the terminal device adds the first cell to the blacklist, the terminal device will try to camp on the second cell. When the number of connection establishment attempts of the terminal device is less than or equal to the attempt number threshold, the terminal device will retry to initiate a connection establishment procedure to other cells, for example, by reselecting the camped second cell and reinitiating the connection establishment procedure in the second cell. When the connection establishment attempt number of the terminal device is larger than the attempt number threshold, the terminal device does not perform the connection establishment attempt of the current service any more.
Optionally, when the forbidden time of the terminal device is less than or equal to the forbidden time threshold, the terminal device records the trial waiting time. And when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, the terminal equipment initiates the connection establishment flow to the first cell again. For example, the terminal device sets an attempt wait timer T-Retry, and sets the length of time of T-Retry (i.e., sets the attempt wait time threshold). And after the T-Retry is overtime, the terminal equipment can initiate the connection establishment flow to the first cell again. In this case, the attempt wait time threshold is determined based on the prohibited time of the terminal device. For example, the set attempt wait time threshold is greater than or equal to the forbidden time for the terminal device. Assuming that the access prohibited time of the terminal device is 500ms, the terminal device may set the attempt wait time threshold to 501 ms. It should be noted that it is not advisable to set the prohibited time larger than the terminal device too much when setting the trial wait time threshold.
Optionally, when the storage time of the first cell in the blacklist is greater than the storage time threshold of the first cell in the blacklist, the terminal device removes the blacklist from the first cell. In this case, the terminal device may attempt to camp on the first cell again.
The embodiment of the application provides a communication method, which is applied to terminal equipment. When the connection establishment of the terminal equipment fails, the connection establishment process can be initiated again according to the trial waiting time of the terminal equipment and/or the connection establishment trial times of the terminal equipment. By the method, the terminal equipment adopts a 'waiting' mechanism and a 'retrying' mechanism, so that the success rate of the connection establishment can be effectively increased, the connection establishment is triggered without depending on new data transmission or new paging information, and the service delay is effectively reduced.
Specifically, the embodiment of the present application defines the number of connection establishment attempts of the terminal device and a threshold of the number of connection establishment attempts, and when the number of connection establishment attempts of the terminal device is greater than the threshold, the terminal device may temporarily place a cell that cannot currently provide a service in a blacklist, and attempt to camp on a new cell to recover a service. Therefore, the terminal equipment can effectively avoid the abnormal cells with congestion, reduce the cell load and improve the service success rate of the terminal equipment. In addition, the embodiment of the application also defines the trial waiting time and the trial waiting time threshold of the terminal equipment. The terminal device may set the trial waiting time threshold according to the "forbidden time" carried in the network rejection message or according to the service model, thereby achieving the balance of power consumption and service delay.
The following describes in detail a specific procedure when the communication method provided by the embodiment of the present application is applied to an actual communication scenario (for example, a terminal device initiates a connection establishment procedure through random access). Fig. 3 is a flowchart illustrating an application embodiment of a communication method according to an embodiment of the present application, which specifically includes the following steps:
1. when the terminal equipment has application data to be sent to the network equipment or receives a paging message from the network equipment, the terminal triggers a service establishment request and tries to initiate a connection establishment flow.
2. Initializing C-TryCounter to be 0, and adding one to C-TryCounter when the terminal equipment initiates a connection establishment flow.
3. After the terminal equipment initiates a connection establishment flow, judging whether the connection establishment is successful: if the connection is successfully established, resetting the value of the C-TryCounter to 0, and transmitting data through the established connection without initiating a connection establishment flow by the terminal equipment; if the connection establishment fails, step 4 is executed.
4. The terminal equipment judges whether the connection establishment attempt times are larger than an attempt time threshold value: if C-TryCount r is larger than N-Max-Retry, the terminal equipment reaches the maximum number of attempts, the connection establishment of the service is not attempted later, the terminal equipment resets the value of C-TryCount to 0, and step 11 is executed; if the C-TryCounter is less than or equal to the N-Max-Retry, the terminal device may further continue to attempt to initiate the connection establishment procedure, and perform step 5.
5. The terminal equipment judges whether the reason of the connection establishment failure is access forbidden: if the reason for the connection establishment failure of the terminal equipment is that the non-access is forbidden, executing the step 6; if the reason for the connection establishment failure of the terminal device is that the access is forbidden, step 8 is executed.
6. The terminal device sets the length of the timer T-Retry and starts the timer. The time length of the T-Retry can be set according to the actual scene. For example, when the reason for the connection establishment failure of the terminal device is that access is prohibited, the terminal device sets T-Retry as the time when access is prohibited. Otherwise, the terminal equipment sets T-Retry according to the predefined value.
7. And when the T-Retry is overtime, the terminal equipment tries to initiate the connection establishment flow again.
8. The terminal device calculates T-access barred-Length, and the detailed description refers to the description of corresponding steps in the embodiment of fig. 2, which is not described herein again.
9. The terminal equipment judges whether the forbidden time is greater than a forbidden time threshold value: if T-Access barred-Length is greater than T-Access barred-Threshold, executing step 10; if T-Access barred-Length is less than or equal to T-Access barred-Threshold, then step 6 is executed.
10. The terminal equipment adds the current cell into a BlackList, stops recording T-Retry, and sets the storage time T-BlackList-Length of the cell in the BlackList and the storage time Threshold (T-BlackList-Threshold) of the cell in the BlackList. And the terminal equipment selects to re-reside in the new cell, namely, initiates a connection establishment process to the new cell.
When the time that the first cell is stored in the BlackList exceeds the T-BlackList-Threshold corresponding to the first cell, the terminal device may move the first cell out of the BlackList. At this time, the terminal device may initiate a procedure of re-camping on the first cell once, in order to attempt to camp on the currently optimal cell. That is, the first cell is the optimal cell (e.g., the highest signal strength) for which the terminal device currently requests to camp on, but is not available due to temporary congestion. By the method, the terminal equipment can recover to reside in the first cell after forbidding the first cell for a period of time, thereby being beneficial to improving the service performance of the terminal equipment.
11. The terminal equipment adds the current cell into a BlackList, stops recording T-Retry, and sets the storage time T-BlackList-Length of the cell in the BlackList and the storage time Threshold (T-BlackList-Threshold) of the cell in the BlackList. And the terminal equipment selects to camp on the new cell again. It should be noted that, compared to step 10, since the number of connection establishment attempts of the terminal device has exceeded the attempt number threshold, the terminal device will not make connection establishment attempts for the same service any more.
The following describes in detail the apparatus and the terminal device according to the embodiments of the present application.
Fig. 4 is a schematic diagram of a communication device according to an embodiment of the present application. The communication apparatus 400 includes: a transceiving unit 401 and a processing unit 402. The transceiver 401 is configured to initiate a connection establishment procedure, where the connection establishment procedure includes a connection establishment procedure triggered based on a paging message from the first cell and/or a connection establishment procedure initiated based on uplink data transmission. The transceiving unit 401 is further configured to initiate a connection establishment procedure again according to the attempt waiting time of the terminal device and/or the number of connection establishment attempts of the terminal device when the connection establishment of the terminal device fails.
In an optional implementation manner, the transceiver unit 401 is configured to initiate a connection establishment procedure, and includes:
when uplink data to be sent exist in the terminal equipment or the terminal equipment receives a paging message from a first cell, sending a connection establishment request message to the first cell;
the processing unit 402 is configured to update the number of connection establishment attempts of the terminal device.
In an optional implementation manner, the processing unit 402 is further configured to add the first cell to a blacklist and set a storage time threshold of the first cell in the blacklist when the connection establishment of the terminal device fails and the connection establishment attempt number of the terminal device is greater than the attempt number threshold; and requesting to camp on the second cell.
In an alternative embodiment, the processing unit 402 is further configured to record the attempt waiting time of the terminal device when the reason for the connection establishment failure of the terminal device is that non-access is disabled and the number of connection establishment attempts of the terminal device is less than or equal to the number of attempts threshold. The transceiver unit 401 is further configured to initiate the connection establishment procedure to the first cell again when the attempt waiting time of the terminal device is greater than the attempt waiting time threshold.
In an optional embodiment, the processing unit 402 is further configured to record the forbidden time of the terminal device when the reason for the connection establishment failure of the terminal device is that access is forbidden and the number of connection establishment attempts of the terminal device is less than or equal to the number of attempts threshold; and when the forbidden time of the terminal equipment is greater than the forbidden time threshold, adding the first cell into a blacklist, and setting a storage time threshold of the first cell in the blacklist. The transceiving unit 401 is further configured to initiate a connection establishment procedure to the second cell.
In an alternative embodiment, the processing unit 402 is further configured to record the forbidden time of the terminal device when the reason for the connection establishment failure of the terminal device is that the access is forbidden and the number of connection establishment attempts of the terminal device is less than or equal to the number of attempts threshold. When the forbidden time of the terminal equipment is smaller than or equal to the forbidden time threshold value, the trial waiting time of the terminal equipment is recorded, and the trial waiting time threshold value is set according to the forbidden time of the terminal equipment. And when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment flow to the first cell again.
In an alternative embodiment, the processing unit 402 is further configured to move the first cell out of the blacklist when the storage time of the first cell in the blacklist is greater than the storage time threshold of the first cell in the blacklist. The transceiving unit 401 is further configured to request camping on the first cell.
In an alternative embodiment, the attempt waiting time of the terminal device and/or the number of connection establishment attempts of the terminal device are determined according to the service type of the terminal device.
The relevant content in the above optional implementation can be referred to the relevant content in the above method embodiment, and is not described in detail here.
Fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device 500 includes: the processor 501, the memory 502, the processor 501 and the memory 502 are connected by one or more communication buses.
The Processor 501 may be a Central Processing Unit (CPU), and may also be other general purpose processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field-Programmable Gate arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (Static RAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (Synchronous DRAM, SDRAM), Double Data Rate SDRAM (Double Data Rate SDRAM, DDR SDRAM), Enhanced SDRAM (Enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct bus RAM (DR RAM).
The processor 501 is configured to support the terminal device to perform the corresponding functions of the terminal device in the communication method shown in fig. 2 and 3. The memory 502 may include read-only memory and random access memory, and provides computer programs and data to the processor 501. A portion of the memory 502 may also include non-volatile random access memory. When the processor 501 calls the computer program, it is configured to:
initiating a connection establishment procedure, wherein the connection establishment procedure comprises a connection establishment procedure triggered based on a paging message from the first cell and/or a connection establishment procedure initiated based on uplink data transmission;
and when the connection establishment of the terminal equipment fails, initiating the connection establishment flow again according to the attempt waiting time of the terminal equipment and/or the connection establishment attempt times of the terminal equipment.
In an alternative embodiment, the processor 501, when invoking the computer program, is configured to perform:
when uplink data to be sent exist in the terminal equipment or the terminal equipment receives a paging message from a first cell, sending a connection establishment request message to the first cell;
the number of connection establishment attempts of the terminal device is updated.
In an alternative embodiment, the processor 501, when invoking the computer program, is configured to perform:
when the connection establishment of the terminal equipment fails and the connection establishment attempt times of the terminal equipment are greater than the attempt time threshold, adding the first cell into a blacklist, and setting a storage time threshold of the first cell in the blacklist;
and requesting to camp on the second cell.
In an alternative embodiment, the processor 501, when invoking the computer program, is configured to perform:
when the reason of the connection establishment failure of the terminal equipment is that non-access is forbidden and the connection establishment attempt number of the terminal equipment is less than or equal to the attempt number threshold, recording the attempt waiting time of the terminal equipment;
and when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment flow to the first cell again.
In an alternative embodiment, the processor 501, when invoking the computer program, is configured to perform:
when the reason of the connection establishment failure of the terminal equipment is that the access is forbidden and the connection establishment attempt times of the terminal equipment are less than or equal to the attempt time threshold, recording the forbidden time of the terminal equipment;
when the forbidden time of the terminal equipment is greater than the forbidden time threshold, adding the first cell into a blacklist, and setting a storage time threshold of the first cell in the blacklist;
and initiating a connection establishment process to the second cell.
In an alternative embodiment, the processor 501, when invoking the computer program, is configured to perform:
when the reason of the connection establishment failure of the terminal equipment is that the access is forbidden and the connection establishment attempt times of the terminal equipment are less than or equal to the attempt time threshold, recording the forbidden time of the terminal equipment;
when the forbidden time of the terminal equipment is less than or equal to the forbidden time threshold, recording the trial waiting time of the terminal equipment;
setting an attempt waiting time threshold according to the forbidden time of the terminal equipment;
and when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment flow to the first cell again.
In an alternative embodiment, the processor 501, when invoking the computer program, is configured to perform:
and when the storage time of the first cell in the blacklist is greater than the storage time threshold of the first cell in the blacklist, removing the first cell from the blacklist and requesting to reside in the first cell.
In an alternative embodiment, the attempt waiting time of the terminal device and/or the number of connection establishment attempts of the terminal device are determined according to the service type of the terminal device.
The relevant content in the above optional implementation can be referred to the relevant content in the above method embodiment, and is not described in detail here.
The embodiment of the application provides a chip. The chip includes: a processor and a memory. The number of processors may be one or more, and the number of memories may be one or more. The processor may perform the communication method shown in fig. 2 or fig. 3, and the steps performed by the related embodiments, by reading the instructions and data stored in the memory.
The embodiment of the present application further provides a chip module, where the chip module includes the above chip, and can execute the communication method shown in fig. 2 or fig. 3, and the steps executed by the related embodiments.
The embodiment of the application also provides a computer readable storage medium. The computer readable storage medium stores a computer program comprising program instructions that, when executed by a processor, perform the communication method shown in fig. 2 or fig. 3 and the steps performed by the related embodiments.
The computer readable storage medium may be an internal storage unit of the terminal device or the access network device according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer readable storage medium may also be an external storage device of the terminal device or the access network device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the device. Further, the computer readable storage medium may also include both an internal storage unit and an external storage device of the terminal device or the access network device. The computer readable storage medium is used for storing the computer program and other programs and data required by the terminal device or the access network device. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
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.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each physical unit may separately include the functional units, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (13)
1. A communication method is applied to a terminal device, and the method comprises the following steps:
initiating a connection establishment procedure, the connection establishment procedure comprising a connection establishment procedure triggered based on a paging message from a first cell and/or a connection establishment procedure initiated based on uplink data transmission;
and when the connection establishment of the terminal equipment fails, initiating a connection establishment process again according to the trial waiting time of the terminal equipment and/or the connection establishment trial times of the terminal equipment.
2. The method of claim 1, wherein the initiating the connection establishment procedure comprises:
when uplink data to be sent exists in the terminal equipment or the terminal equipment receives a paging message from the first cell, sending a connection establishment request message to the first cell;
and updating the connection establishment attempt times of the terminal equipment.
3. The method according to claim 1 or 2, wherein when the connection establishment of the terminal device fails, the initiating the connection establishment procedure again according to the attempt waiting time of the terminal device and/or the connection establishment attempt number of the terminal device comprises:
when the connection establishment of the terminal equipment fails and the connection establishment attempt times of the terminal equipment are larger than the attempt time threshold, adding the first cell into a blacklist, and setting a storage time threshold of the first cell in the blacklist;
and requesting to camp on the second cell.
4. The method according to claim 1 or 2, wherein when the connection establishment of the terminal device fails, the initiating the connection establishment procedure again according to the attempt waiting time of the terminal device and/or the connection establishment attempt number of the terminal device comprises:
when the reason of the connection establishment failure of the terminal equipment is that non-access is forbidden and the connection establishment attempt number of the terminal equipment is less than or equal to the attempt number threshold, recording the attempt waiting time of the terminal equipment;
and when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment process to the first cell again.
5. The method according to claim 1 or 2, wherein when the connection establishment of the terminal device fails, the initiating the connection establishment procedure again according to the attempt waiting time of the terminal device and/or the connection establishment attempt number of the terminal device comprises:
when the reason of the connection establishment failure of the terminal equipment is that access is forbidden and the connection establishment attempt number of the terminal equipment is less than or equal to the attempt number threshold, recording the forbidden time of the terminal equipment;
when the forbidden time of the terminal equipment is greater than a forbidden time threshold, adding the first cell into a blacklist, and setting a storage time threshold of the first cell in the blacklist;
and initiating a connection establishment process to the second cell.
6. The method of claim 5, wherein after the recording of the forbidden time of the terminal device, the method further comprises:
when the forbidden time of the terminal equipment is less than or equal to a forbidden time threshold value, recording the trial waiting time of the terminal equipment;
setting an attempt waiting time threshold according to the forbidden time of the terminal equipment;
and when the attempt waiting time of the terminal equipment is greater than the attempt waiting time threshold, initiating the connection establishment process to the first cell again.
7. The method according to claim 3 or 5, characterized in that the method further comprises:
when the storage time of the first cell in the blacklist is larger than the storage time threshold of the first cell in the blacklist, removing the first cell from the blacklist;
requesting camping on the first cell.
8. The method according to any of claims 1-7, characterized in that the attempt waiting time of the terminal device and/or the number of connection setup attempts of the terminal device is determined according to the traffic type of the terminal device.
9. A communications apparatus, comprising:
a transceiving unit, configured to initiate a connection establishment procedure, where the connection establishment procedure includes a connection establishment procedure triggered based on a paging message from a first cell and/or a connection establishment procedure initiated based on uplink data transmission;
the transceiver unit is further configured to initiate a connection establishment procedure again according to the attempt waiting time of the terminal device and/or the number of connection establishment attempts of the terminal device when the connection establishment of the terminal device fails.
10. A terminal device, characterized in that the terminal device comprises a processor and a memory, the processor and the memory being interconnected, wherein the memory is configured to store a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the method according to any one of claims 1 to 8.
11. A chip comprising a processor and a data interface, the processor reading instructions stored on a memory through the data interface to perform the method of any one of claims 1 to 8.
12. A chip module, characterized in that it comprises a chip as claimed in claim 11.
13. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the method according to any one of claims 1 to 8.
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