CN101370197B - Dual-standby terminal and method for switching between dual-module dual-standby terminal modes - Google Patents
Dual-standby terminal and method for switching between dual-module dual-standby terminal modes Download PDFInfo
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Abstract
The invention discloses a dual-mode dual-standby terminal in which both a mode A non-access layer protocol stack and a mode B non-access layer protocol stack can access and update a Number 1 non-access layer information unit and a Number 2 non-access layer information unit, and also can perform a non-access layer processing to data flows and events of the Number 1 and the Number 2; both a mode A access layer protocol stack and a mode B access layer protocol stack can access and update a Number 1 access layer information unit and a Number 2 access layer information unit, and also can perform the access layer processing to the data flows and events of the Number 1 and the Number 2; besides, the mode A access layer protocol stack and the mode B access layer protocol stack can carry out information interaction. Switching between the modes can be accomplished by using the invention. Meanwhile, the invention also provides a method for switching between the modes of the dual-mode dual-standby terminal, and a single-mode dual-standby terminal.
Description
Technical Field
The invention relates to the technical field of mobile terminals, in particular to a dual-mode dual-standby terminal, a single-mode dual-standby terminal and a method for switching modes of the dual-mode dual-standby terminal.
Background
With the demands of users on terminals, such as the desire to separate work and life when using terminals, two numbers are required to be used for standby and communication in a network, and dual standby terminals are produced. From the technical point of view, particularly from the point of distinguishing whether the access technologies are the same or not, dual standby terminals include two major categories, one category is single-mode dual standby terminals, such as GSM (global system for mobile communications) dual standby terminals; the other is a dual mode dual standby terminal, such as TD-SCDMA (time division synchronous code division multiple access technology)/GSM dual standby terminal. From the perspective of a user, the dual-mode dual-standby terminal not only meets the requirement of dual-number standby of the user, but also can provide different tariff strategies and different service qualities for the user, so that the dual-mode dual-standby terminal has more functional advantages than a single-mode dual-standby terminal.
Referring to fig. 1, a schematic structural diagram of a single mode dual standby terminal, which is exemplified by a GSM dual standby terminal, includes two sets of GSM wireless receivers and transmitters, which are respectively responsible for standby and communication of two numbers in a GSM network. Referring to fig. 2, a schematic structural diagram of a dual-mode dual-standby terminal, which is exemplified by a TD-SCDMA/GSM dual-standby terminal, includes a set of TD-SCDMA wireless receiver and transmitter, and a set of GSM wireless receiver and transmitter, which are respectively used for two numbers to stand by and communicate in a TD-SCDMA network and a GSM network. In the existing two types of dual standby terminals, each communication protocol stack (access stratum protocol stack and non-access stratum protocol stack) only reads the relevant information of the number from one number interface and provides standby and communication services for only one number, the two communication protocol stacks are basically independent from each other, and the application layer coordinates the input and output of each number in standby and communication states.
Due to the adoption of the technology, the two types of dual standby terminals have some problems.
1. The dual-mode dual-standby terminal is still not perfect.
1.1, firstly, the condition of realizing 'dual standby' by the existing dual-mode dual-standby terminal is that the networks in the two modes are required to be normal, and if a certain network has a problem, the dual-standby function cannot be realized.
1.2, furthermore, the existing dual-mode dual-standby terminal does not support switching between modes, so-called switching between modes refers to that a service of a number is switched from one mode to another mode, the service is the service of the number before and after switching, and the switching is directed at one number. In the existing dual-mode single-standby terminal, switching between two modes can be performed, which is obvious because only one number is in the dual-mode single-standby terminal, and when one mode provides service, the other mode is idle, so that switching between modes can be realized. However, this approach is not suitable for the existing dual-mode dual-standby terminal. This is because the communication protocol stack of each mode of the existing dual-mode dual-standby terminal only provides standby and communication services for one number, and under the condition of dual-number standby, the protocol stack of each mode already provides services for one number, so that it is impossible to provide services for another number any more, and then the requirement of the user cannot be better met under certain conditions, for example, when the service of the user in one mode is about to be unable to continue communication due to poor coverage, the service cannot be switched to another mode to continue, and service interruption is likely to be caused, which affects the normal communication of the user.
In order to solve the problem of service interruption caused by the fact that the existing dual-mode dual-standby terminal cannot switch between modes, a scheme for transferring the voice service of one number in one mode to another number in another mode to continue in a call transfer mode is provided. The following describes the scheme by taking the current situation that the terminal is transferred from TD-SCDMA mode to GSM mode as an example. Referring to fig. 2, a call forwarding diagram of a dual-mode dual-standby terminal is shown.
First, the network needs to define a "dedicated conditional call forwarding service" for transferring from TD-SCDMA mode to GSM mode, which can transfer the current voice service from TD-SCDMA mode to GSM mode and associate TD-SCDMA number of the terminal with GSM number, regardless of whether the current terminal is a calling or called terminal.
After activating the call forwarding service, the terminal executes the following steps in the process of voice service:
[1] the terminal reports a measurement report in a TD-SCDMA mode according to the requirement of network test control information;
[2] when RNC (radio network controller) determines that the terminal signal is not good and needs to be switched according to the measurement report, a relocation request containing calling GSM identification is sent to MSC Server (Mobile service center Server), and the voice service is triggered to be transferred from TD-SCDMA mode to GSM mode;
[3] MSC Server sends the message that the appointed number of 'special condition call forwarding service' is the calling party and the associated GSM number is the called party to MSC/VLR (visitor location register), initiates the call of the associated GSM number;
[4] MSC/VLR inquires the location information of the relevant GSM number from HLR (home location register) of GSM network;
[5] MSC/VLR initiates paging to GSM number of terminal, and assigns ground resource;
[6] after receiving the paging, the GSM module of the terminal returns a paging response, judges whether the calling number is a number appointed by a special conditional call forwarding service, if so, sends a response message to put through the call, and then provides peripheral equipment (such as a receiver, a microphone and the like) related to the voice service in the terminal for the voice service in the GSM mode;
[7] MSC Server receives successful establishment transfer message fed back by MSC/VLR, switches channel to GSM calling, and informs RNC to release TD-SCDMA network resource distributed for voice service of TD-SCDMA number.
However, the above-described call forwarding scheme has some problems:
long time and low success rate
The scheme includes a procedure of accessing a target mode HLR to determine current location information of the mode number, paging the number and establishing a voice service call in the target mode network during a call forwarding procedure, which is equivalent to a procedure of a voice service call in the target mode network. Moreover, since the procedure is performed in the original mode, the quality of the voice service is not good, and the time of the transfer procedure is long, the voice service may be interrupted due to the quality deterioration before the completion of the voice service transfer procedure, and the call transfer of the voice service may also fail, or the voice quality may be degraded in this time. If the success rate of service forwarding is improved by setting the threshold of call forwarding, the number of call forwarding processes between the modes in the network may be increased, and the processing load of the network with two modes is increased.
② sensitivity reduction of dual-mode dual-standby terminal
Before the scheme is successfully transferred, the terminal needs to continue to maintain up-and-down communication in the original mode on one hand, and also needs to receive paging and establish a call in the target mode on the other hand, that is, in the process of the dual-mode dual-standby terminal, the wireless transceivers in both modes receive and transmit wireless signals. When two modes of wireless transceivers in the dual-standby terminal simultaneously transmit signals, a transmitter in one wireless transceiver transmits a wireless signal to generate interference on a receiver in the other wireless transceiver, so that the sensitivities of the two modes of wireless receivers are reduced, and the service quality is affected. When the call transfer between the modes is needed, the quality of the voice service in the original mode is not good, and the sensitivity is suddenly reduced at the moment, so that the voice service is easily interrupted before the call transfer is successful; in the target mode, the reduction of the sensitivity may also cause that the terminal cannot receive paging information of the network in the target mode, or the call establishment process of the voice service cannot be completed, resulting in a call failure, and especially in the case that the cells of the two modes are co-sited, when the terminal needs to perform call transfer between the two modes for the voice service, the terminal is usually located at the edge of the cell of the two modes, and at this time, the failure probability of the call transfer process of the voice service is higher.
Thirdly, the supported service types are limited
At present, the above scheme can only be used for voice service, but is not applicable to call forwarding for data service, for example, short messages and multimedia information cannot be forwarded.
2. For a single-mode dual-standby terminal, each number is respectively communicated with a network based on the same access technology through different wireless transceivers, if two numbers are simultaneously communicated with the network, when an emitter in one set of wireless transceivers transmits a dotted line signal, interference can be generated on a receiver in the other set of wireless transceivers, so that the sensitivity of the two receivers is reduced, the service quality is influenced, and the requirement that the sensitivity reduction range of the dual-standby terminal in the current industry standard is within 6dB is difficult to meet.
Disclosure of Invention
In view of this, the present invention provides a dual-mode dual-standby terminal, which can implement a dual-standby function even when a network failure occurs in a certain mode, and more importantly, can implement switching between modes; meanwhile, the invention also provides a method for switching between the modes of the dual-mode dual-standby terminal; the problem of interference existing when the existing dual-mode dual-standby terminal carries out call transfer of services between different modes can be effectively solved.
In addition, the invention also provides a single-mode dual-standby terminal which can effectively solve the interference problem of the existing single-mode dual-standby terminal.
Therefore, the embodiment of the invention adopts the following technical scheme:
a dual-mode dual-standby terminal, comprising: mode A non-access stratum protocol stack, mode B non-access stratum protocol stack, mode A access stratum protocol stack and mode B access stratum protocol stack, still include: a first number non-access layer information unit, a second number non-access layer information unit, a first number access layer information unit and a second number access layer information unit; the mode A non-access layer protocol stack and the mode B non-access layer protocol stack can access and update a number one non-access layer information unit and a number two non-access layer information unit, and can perform non-access layer processing on data streams and events of the number one and the number two; the mode A access layer protocol stack and the mode B access layer protocol stack can access and update a number one access layer information unit and a number two access layer information unit, and can perform access layer processing on data streams and events of the number one and the number two; and the mode A access layer protocol stack and the mode B access layer protocol stack can carry out information interaction.
And the mode A access layer protocol stack is used for acquiring a mode B cell measurement result adjacent to the mode A service cell from the mode B access layer protocol stack.
The method comprises the steps that a mode A access layer protocol stack providing service for a number one is used for sending an inter-mode switching notification to a mode B access layer protocol stack after receiving an inter-mode switching instruction sent by a network side; and after receiving the notification of switching between the modes, the mode B access layer protocol stack for providing service for the number two accesses and updates the number one access layer information unit, and notifies the mode B non-access layer protocol stack to access and update the number one non-access layer information unit.
The mode B access layer protocol stack supports the service of a number two while the service of the number one is switched; or, the mode B access layer protocol stack suspends the number two service after receiving the inter-mode switching notification, and resumes the number two service after the number one service switching process is finished.
The mode A non-access stratum protocol stack and the mode B non-access stratum protocol stack are integrated functional entities.
A method for switching between modes of a dual-mode dual-standby terminal comprises the following steps: after receiving an inter-mode switching instruction sent by a network side, a mode A access layer protocol stack sends an inter-mode switching notification to a mode B access layer protocol stack; after the mode B access layer protocol stack receives the notification of the switching between the modes, the mode B access layer protocol stack accesses the number I access layer information unit of the mode A service, and notifies the mode B non-access layer protocol stack to access the number I non-access layer information unit, and takes over the service of the number I.
The method further comprises the following steps: the mode A access layer protocol stack acquires a mode B cell measurement result adjacent to a mode A service cell from the mode B access layer protocol stack, and the acquired mode B adjacent cell measurement result and the self-mode measurement result are combined into a measurement report to be sent to the network side.
Further comprising: the method comprises the steps of supporting the service of a number two while switching the service of the number one; or, the number two service is suspended after the inter-mode switching notification is received, and the number two service is resumed after the number one service switching process is finished.
A method for changing packet service cell between modes of dual-mode dual-standby terminal includes: after receiving an inter-mode cell change instruction sent by a network side, a mode A access layer protocol stack sends an inter-mode cell change notification to a mode B access layer protocol stack; and after receiving the inter-mode cell change notification, the mode B access layer protocol stack accesses the number I access layer information unit, notifies the mode B non-access layer protocol stack to access the number I non-access layer information unit, and takes over the service of the number I.
A method for reselecting a packet service cell between modes of a dual-mode dual-standby terminal comprises the following steps: when the mode A access layer protocol stack needs to perform packet service cell reselection, sending an inter-mode cell reselection notification to a mode B access layer protocol stack; and after receiving the inter-mode cell reselection notification, the mode B access layer protocol stack accesses the number one access layer information, notifies the mode B non-access layer protocol stack to access the number one non-access layer information, and takes over the number one service.
A multimode multi-standby terminal can provide three modes of service for at least three numbers, wherein each mode corresponds to a non-access layer protocol stack and an access layer protocol stack; the non-access layer protocol stack corresponding to each mode can access and update the non-access layer information of each number, and can perform non-access layer processing on data streams and events of each number; the access layer protocol stack corresponding to each mode can access and update the access layer information of each number, and can perform access layer processing on the data stream and event of each number, and the access layer protocol stacks corresponding to each mode can perform information interaction.
A single mode dual standby terminal, comprising: a first number non-access stratum information element, a second number non-access stratum information element, a first number access stratum information element and a second number access stratum information element, and: the non-access layer protocol stack is used for accessing and updating the first number non-access layer information unit or the second number non-access layer information unit and is also responsible for carrying out non-access layer processing on data streams and events of the first number and the second number; the access layer protocol stack is used for accessing and updating the first number access layer information unit or the second number access layer information unit, and is also responsible for performing access layer processing on data streams and events of the first number and the second number; the terminal also includes a transceiver responsible for receiving or transmitting the signaling and traffic data streams of the two numbers.
A single mode multi-standby terminal can at least provide uniform mode service for three numbers, wherein each number corresponds to the same non-access layer protocol stack, access layer protocol stack and transceiver, and each number corresponds to a non-access layer information unit and an access layer information unit; the non-access layer protocol stack can access and update non-access layer information units corresponding to all numbers, and is also responsible for performing non-access layer processing on data streams and events of all numbers; the access layer protocol stack can access and update the access layer information units corresponding to all numbers, and is also responsible for performing access layer processing on data streams and events of all numbers.
The technical effect analysis of the technical scheme is as follows:
(1) the invention separates the relative information of each number from the protocol stack, so that the protocol stacks in different modes can access and update the relative information of each number to provide standby and communication services for the number, and meanwhile, the protocol stacks can access and update the relative information units of different numbers to provide standby and communication services for different numbers according to the content of the relative information units of different numbers.
(2) The inter-mode switching provided by the invention is similar to hard switching, compared with the existing call transfer-based scheme, the switching time is short, and in the switching process, when the terminal receives and sends information in the target mode, the information receiving and sending is stopped in the original mode, so that the interference between two mode wireless transceivers can not be generated, and the switching success rate is high. Different from the existing call transfer scheme which can only switch voice services, the dual-mode dual-standby terminal can realize various service switching through CS service switching and PS service cell reselection or cell change (cell change).
(3) When the dual-mode dual-standby terminal provided by the invention realizes the switching between the modes, any network equipment or the working flow of the network side does not need to be changed, unlike the scheme based on call forwarding in the prior art, the switching can be realized only by adding new functions to the network equipment such as MSC Server and the like on the network side.
(4) The invention executes the standard switching process, does not relate to the charging of a plurality of numbers, does not need additional charging strategies and does not need to modify a charging system.
(5) In the single-mode dual-standby terminal provided by the invention, the protocol stack corresponding to each number is unified with the transceiver, so that the problem of interference generated when two numbers are communicated is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a single-mode dual-standby terminal in the prior art;
FIG. 2 is a schematic structural diagram of a dual-mode dual-standby terminal in the prior art;
fig. 3 is a schematic view of call forwarding of a dual-mode dual-standby terminal in the prior art;
FIG. 4 is a schematic structural diagram of a dual-mode dual-standby terminal according to the present invention;
FIG. 5 is a second structural diagram of a dual-mode dual-standby terminal according to the present invention;
FIG. 6 is a flow chart of switching between modes of the dual-mode dual-standby terminal according to the present invention;
fig. 7 is a schematic structural diagram of a single-mode dual-standby terminal according to the present invention.
Detailed Description
As analyzed above, the existing single-mode dual-standby terminal and dual-mode dual-standby terminal both include two sets of independent protocol stacks and wireless transceivers, each set of protocol stack corresponds to a number, that is, each set of protocol stack includes related information of a number, and the protocol stacks utilize the information to control the wireless transceivers to perform communication of the number, which determines the problem of interference between the two wireless transceivers when two numbers are communicated simultaneously, and also determines the limitation that switching between modes cannot be realized in the dual-mode dual-standby terminal. The present invention provides a dual-mode dual-standby terminal, a method for switching between modes of the dual-mode dual-standby terminal, and a single-mode dual-standby terminal, starting from the defects of the existing dual-standby terminal, and the core of the present invention is to separate the protocol stack and the user number information in the dual-standby terminal, so that each protocol stack can access and update the related information of two numbers, and provide standby and communication services for a plurality of numbers.
The following describes the dual-mode dual-standby terminal, the inter-mode switching method of the dual-mode dual-standby terminal, and the single-mode dual-standby terminal provided by the present invention in detail with reference to the accompanying drawings.
Referring to fig. 4, a schematic structural diagram of the dual-mode dual-standby terminal provided by the present invention is shown, in which a number one of the terminal operates in a mode a, and a number two operates in a mode B, wherein a dashed frame is a key improvement of the present invention.
As can be seen, the system includes an input/output module 401, an application layer module 402, a number one interface 403, a number two interface 404, a mode a non-access stratum protocol stack 405, a mode B non-access stratum protocol stack 406, a mode a access stratum protocol stack 407, a mode B access stratum protocol stack 408, a mode a transceiver 409, a mode B transceiver 410, a number one non-access stratum information unit 411, a number two non-access stratum information unit 412, a number one access stratum information unit 413, and a number two access stratum information unit 414. In addition, since the "dual mode" of the dual mode dual standby terminal only refers to the access stratum and the functions at the non-access stratum are similar, the functions of the non-access stratum protocol stacks of the two modes are substantially similar, so that preferably, the mode a non-access stratum protocol stack 405 and the mode B non-access stratum protocol stack 406 in fig. 4 can be taken as a whole, and referring to fig. 5, the non-access stratum protocol stack 501 is in charge of the processing of the non-access stratum protocols of the mode a and the mode B in a unified manner.
Wherein,
the input/output module 401 is responsible for inputting and outputting information in two modes of the dual-mode dual-standby terminal; the application layer module 402 is responsible for performing application layer processing on the input information and then sending the processed information to the non-access layer protocol stack, or performing application layer processing on the processed information of the non-access layer protocol stack and then sending the processed information through the input/output module 401; the first number interface 403 and the second number interface 404 are respectively used for acquiring relevant information of the first number and the second number and providing the relevant information to corresponding information units; the mode a transceiver 409 and the mode B transceiver 410 are used for wireless transceiving of number one and number two signals, respectively.
In addition to this, the present invention is,
a mode a non-access stratum protocol stack 405 for accessing and updating the number one non-access stratum information element 411 and the number two non-access stratum information element 412, and for performing non-access stratum processing on data streams and events (events) of the number one and the number two; similarly, the mode B non-access stratum protocol stack 406 is used to access and update the number one non-access stratum information element 411 and the number two non-access stratum information element 412, and also to perform non-access stratum processing on the number one and number two data streams and events. As is well known to those skilled in the art, events are the mechanism by which programs communicate with each other. An event is a notification that something has occurred, and when something has occurred, an event notification is sent and the program concerned about the event performs corresponding processing. Such as keyboard or mouse clicks, timer starts, stops and times out, hardware status changes (e.g., SIM/UICC card is unplugged), measurement requests from other protocol stacks, etc.
A mode a access layer protocol stack 407, configured to access and update the number one access layer information unit 413 and the number two access layer information unit 414, and further configured to perform access layer processing on data streams and events of the number one and the number two; similarly, the mode B access layer protocol stack 408 is used to access and update the number one access layer information element 413 and the number two access layer information element 414, and is also used to perform access layer processing on the data streams and events of the number one and the number two; furthermore, information interaction can be performed between the mode a access layer protocol stack 407 and the mode B protocol stack 408.
The number one non-access stratum information unit 411 and the number two non-access stratum information unit 412 are respectively configured to store a part of the non-access stratum information acquired from the number one interface 403 and the number two interface 404, and also receive a part of the non-access stratum information from the non-access stratum protocol stack, that is, the non-access stratum information is updated under the control of the non-access stratum protocol stack. The number one access stratum information unit 413 and the number two access stratum information unit 414 are respectively configured to store a part of the access stratum information acquired from the number one interface 403 and the number two interface 404, and also receive a part of the access stratum information from the access stratum protocol stack, that is, the access stratum information is updated under the control of the access stratum protocol stack. In the present invention, the access stratum information and the non-access stratum information of each number may include the state, parameter values, timer values and identifiers of the state machine of the number in the relevant protocol layer.
The non-access stratum information of each number includes a context of MM/GMM/CC/SS (set of control protocols between UE and CN) of the number, and the non-access stratum information can distinguish the contexts of two numbers by using any one of TI (transaction identifier), TMSI (mobile subscriber identity), P-TMSI (temporary mobile subscriber identity), and the like.
The access stratum information of each number includes access stratum related information in each mode, such as RRC (radio access control) layer status, PDU number, etc., and the access stratum information can distinguish the context of two numbers by using identification. Taking TD-SCDMA as an example, the Identifier can be distinguished by IMSI (international mobile subscriber identity), TMSI, P-TMSI, or RNTI (Radio Network Temporary Identifier, number Temporary Identifier in wireless Network).
As described above, the four protocol stacks can perform relevant protocol processing on data streams and events of the number one and the number two. Taking the access layer as an example, each access layer protocol stack can distinguish which number corresponds to a message on a common channel or a shared channel through access layer identifiers of different numbers, process in combination with the context of the corresponding number, when a number requires the terminal to send data on the common channel or the shared channel, the terminal will also insert the access layer identifier of the number and other required identifiers into the message, when the terminal performs service for a number, if the network allocates a dedicated channel to the terminal, a mapping relationship is established between the dedicated channel and the number, and the terminal receives a message or a data block from the dedicated channel each time in the subsequent process, the context of the corresponding number is combined for processing, and when the terminal needs to send a message or data block related to a certain number to the network through a dedicated channel, the message or data block is sent on the dedicated channel corresponding to the number.
When receiving message, data block or overtime event of timer, the protocol stack in the dual-mode dual-standby terminal provided by the invention judges which number the event is related to first, then accesses the context of the number, acquires the required information, such as state of state machine, state of timer or related parameter value, and further processes the event. When no event occurs, the terminal protocol stack also executes operation according to the related information of the two numbers, for example, when the TD-SCDMA access layer protocol stack in the terminal provides service for the two numbers, if the RRC state in the access layer information of one number is the CELL-PCH state, the physical layer in the access layer needs to monitor the PCH (paging channel), and the RRC state in the access layer information of the other number is the CEL-FACH state, and the physical layer in the access layer needs to monitor the FACH (forward access channel), in the present invention, the PCH and FACH need to be monitored to provide service for the two numbers.
Because the communication protocol stack and the number information in the terminal are separated, and each protocol stack module can access, save or update each number information and process the data stream and the event of each number, each protocol stack module can provide service for two numbers, when a network corresponding to a certain mode cannot be accessed, for example, when the terminal cannot be accessed to a network of a mode A, the mode B protocol stack can be used for accessing, saving or updating the information of the two numbers, the data stream and the event of each number are processed, and the two numbers are all accessed to the network corresponding to the mode B, so that dual standby can be realized when a network of a certain mode fails.
Moreover, each access layer protocol stack can provide services for two numbers, when the cell signal of the mode network where a certain number is located in the standby state is poor, and the adjacent cell of the other mode network accords with the cell reselection condition, the cell can be reselected and resided in the cell of the other mode network through the cell reselection strategy; when a certain number is in service and the signal of the cell of the network in the mode where the certain number is located is poor, the certain number can be switched to work in another mode according to the command of the network, or the certain number is switched to work in another mode through the process of cell reselection or cell change, and the certain number is served by the protocol stack of the access layer in another mode, so that the cell switching between the modes of the service can be realized.
In addition, when only one card is available in the terminal, any access layer protocol stack of the terminal can provide service for the terminal, so that the function of the dual-mode single-standby terminal is realized, and the card number can be in standby in any mode or switched between the two modes.
It should be noted that the present invention is only an improvement to the inside of the mobile terminal, and does not relate to the adjustment of the external network or network device of the mobile terminal, and the procedures for handover, cell reselection and cell change outside the mobile terminal are the same as the corresponding procedures of the standard in the prior art.
Next, a method for switching between modes of the dual-mode dual-standby terminal is described.
By using the dual-mode dual-standby terminal shown in fig. 4 or fig. 5, switching between modes can be realized. Specifically, the method includes inter-mode cell reselection, CS (circuit switched) service handover, PS (packet switched) service cell reselection, and the like. Those skilled in the art know that the real-time requirements of CS services such as voice are high, and the real-time requirements of PS services such as file downloading and internet surfing are low.
Each mode in the dual-mode terminal can provide a measurement report of a neighbor cell of the other mode to the network side, so that the network side can start a switching process and a cell changing process between the modes by using the measurement report. In the invention, the access layer protocol stacks of two modes acquire the measurement result of the adjacent cell of the other mode through the interface between the two modes. For example, for a TD-SCDMA/GSM dual standby terminal, the measurement result of the TD-SCDMA access layer protocol stack to the GSM neighbor cell of the TD-SCDMA serving cell can be obtained through the GSM access layer protocol stack: the TD-SCDMA access layer protocol stack informs the GSM adjacent cells to be measured to the GSM access layer protocol stack through an interface between the TD-SCDMA access layer protocol stack and the GSM access layer protocol stack, and the GSM access layer protocol stack measures the GSM cells and feeds back the measurement result to the TD-SCDMA access layer protocol stack; otherwise, the GSM access layer protocol stack can also obtain the measurement result of the TD-SCDMA neighboring cell of the GSM service cell through the TD-SCDMA access layer protocol stack.
When the terminal performs CS service switching between modes, if the target cell is the same as the original cell of the target mode and the original service is in progress in the target mode, the ongoing service in the target mode can not be suspended during switching; if the target cell is different from the original cell in the target mode, and the terminal does not support residing in different cells in the target mode, for the condition that the original service in the target mode is in progress, the service in progress in the target mode should be suspended during switching, the suspended service should be resumed in the target cell after the completion of switching, and for the condition that no service in progress in the target mode is in progress, the original number in the target mode should reside in the target cell after the completion of switching; if the terminal is supported to reside in different cells in the target mode and there is originally a service in the target mode, the service in the target mode may not be suspended during the handover. When the terminal performs cell reselection or cell change of the PS service between modes, the terminal does not support residing in different cells in the target mode for the difference between the target cell and the original cell of the target mode, and the original CS service is in progress in the target mode; for other cases, reference may be made to the handling of CS traffic handover.
The following describes the inter-mode switching of the dual-mode dual-standby terminal provided by the present invention with a specific example.
Now, assume that number 1 performs CS service, such as call, in mode a; number 2 is idle in the first cell of the mode B network or is performing PS services, e.g. internet access. For the example of the number 1 service being switched from the B cell in the mode a to the B cell, the switching process is shown in fig. 6.
It should be briefly explained here that those skilled in the art understand that the real-time performance of the CS service (e.g., voice service) is strong, but the real-time performance requirement of the PS service is not very strong, the PS service in the target mode may be suspended when the CS service is switched to the target mode, and resume after the CS service is switched, which is allowable for the PS service with low real-time performance requirement.
Fig. 6 includes:
step 601: in the dual-mode dual-standby terminal, a mode A access layer protocol stack acquires a measurement result of a mode B cell adjacent to a mode A service cell from a mode B access layer protocol, and the measurement result of the mode A service cell adjacent to the mode A cell form a measurement report together, and the measurement report is sent to a network side of the mode A through a wireless transceiver of the mode A;
step 602: the network side of the mode A utilizes the received measurement report to carry out switching judgment, and if the mode A needs to be switched to the second cell of the mode B, an instruction for switching the number 1 from the mode A to the second cell in the mode B is sent to the dual-mode dual-standby terminal;
step 603: after a mode A access layer protocol stack in the dual-mode dual-standby terminal acquires a switching instruction from a receiver, on one hand, a mode A non-access layer protocol stack is reported, and on the other hand, related parameters in the switching instruction are notified to a mode B access layer protocol stack, so that the mode B access layer protocol stack performs switching according to the related parameters and stops receiving and sending of a mode A wireless receiver;
step 604: after a mode B access layer protocol stack in the dual-mode dual-standby terminal receives a switching instruction from a mode A access layer protocol stack, if the terminal performance allows, the number 2 service can not be suspended, otherwise, the ongoing PS service of the number 2 should be suspended firstly, then the access layer information of the number 1 is accessed, and the access layer information resides in a mode B cell, meanwhile, the switching is executed according to the requirement of the mode B access layer switching flow, the information is received on a downlink channel specified by the switching instruction, the information is sent on an uplink channel specified by the switching instruction, and the mode B non-access layer protocol stack is informed to take over the CS service of the number 1;
step 605: after completing the three functions in step 604, the mode B access layer protocol stack in the dual-mode dual-standby terminal sends a switch completion instruction to the network side,
step 606: after receiving the switching completion instruction, the network side informs the mode A related network equipment to release related resources of the CS service of the number 1 in the mode A network;
step 607: and after the terminal succeeds in switching the number 1, the number 2 also resides in the B cell of the mode B. If the number 2 has the suspended PS service, the terminal performs a 'cell update' process on the number 2 in the second cell after selecting the second cell of the mode B, and recovers the PS service. If the location areas or routing areas of the first cell and the second cell are different, the updating process of the location area or routing area of the number 2 is needed.
Assuming that the target cell for number 1 handover is the a cell of mode B, i.e. the cell is in the same cell as the number 2 service, since each protocol stack can provide standby and communication services for multiple numbers in this scheme, if the capability of the terminal permits, the ongoing service of number 2 in mode B can be not suspended while performing handover.
The inter-mode switching provided by the invention is similar to hard switching, compared with the existing call transfer-based scheme, the switching time is short, and in the switching process, when the terminal receives and sends information in the target mode, the information receiving and sending is stopped in the original mode, so that the interference between the two modes can not be generated, and the switching success rate is high.
Different from the existing call transfer scheme which can only switch the voice service, the dual-mode dual-standby terminal can realize various service switching by CS service switching and PS service cell reselection or cell change.
As mentioned above, the switching process outside the terminal is the same as the existing switching process, for example, the switching mode of the existing dual-mode single standby terminal can be adopted, and just because the switching process is consistent with the prior art, the switching between the modes of the dual-mode dual-standby terminal provided by the invention does not need to change any network equipment or the working process thereof on the network side, unlike the scheme based on call transfer in the prior art, which needs to add a new function to the network equipment such as MSC Server on the network side, the invention only improves the terminal, does not need to modify the equipment such as RNC, MSC and HLR on the network side, has small influence, and can be well combined with the existing system.
In addition, the existing call forwarding scheme involves two numbers in one call, especially for the case that the user starts to be the calling party, when the call is forwarded to another mode, the original calling party of the call becomes the called party at this time, the charging process is very complicated, great pressure is brought to the charging system, the charging system is likely to need to specially design a charging strategy, and if the call occurs in the middle of one charging unit time interval, the call forwarding scheme can also cause one more charge to the user. The invention executes the standard switching process, does not relate to the charging of a plurality of numbers, does not need additional charging strategies and does not need to modify a charging system.
Similar to the mode switching, the invention also provides a method for changing the packet service cell between the modes of the dual-mode dual-standby terminal, which comprises the following steps: after receiving an inter-mode cell change instruction sent by a network side, a mode A access layer protocol stack sends an inter-mode cell change notification to a mode B access layer protocol stack; and after receiving the inter-mode cell change notification, the mode B access layer protocol stack accesses the first number access layer information, notifies the mode B non-access layer protocol stack to access the first number non-access layer information, and takes over the first number service.
Moreover, the invention also provides a method for reselecting the packet service cell between the modes of the dual-mode dual-standby terminal, which comprises the following steps: when the mode A access layer protocol stack needs to perform packet service cell reselection, sending an inter-mode cell reselection notification to a mode B access layer protocol stack; and after receiving the inter-mode cell reselection notification, the mode B access layer protocol stack accesses the number one access layer information, notifies the mode B non-access layer protocol stack to access the number one non-access layer information, and takes over the number one service.
While the dual-mode dual-standby terminal and the switching between the modes thereof are described above, it should be understood by those skilled in the art that the solution of the present invention is equally applicable to a multi-mode multi-number terminal, for example, a terminal with three modes and three numbers, and the implementation principle and details thereof are consistent with those of the dual-mode dual-standby terminal, and are not described herein again.
Finally, the single-mode dual-standby terminal provided by the present invention is introduced, and fig. 7 is a schematic diagram thereof, wherein a dashed line frame is a key improvement. The single mode dual standby terminal comprises an input/output unit 701, an application layer unit 702, a first number interface 703 and a second number interface 704, in addition, a non-access stratum protocol stack 705, an access stratum protocol stack 706, a transceiver 707, and a first number non-access stratum information unit 708, a second number non-access stratum information unit 709, a first number access stratum information unit 710 and a second number access stratum information unit 711, because the non-access information and the access layer information of the two numbers are separated from the protocol stack, the protocol stack can access and update the non-access information and the access layer information of the two numbers, provide standby and communication services for the two numbers, realize the dual standby function, and the originally separate two transceivers are merged together, when two numbers are communicating with the network at the same time, the interference between wireless transceivers can not exist, and the problem that the service quality is influenced by the reduction of the sensitivity can not be caused.
It should be understood by those skilled in the art that the technology of the present invention is equally applicable to a single-mode multi-number terminal, for example, a terminal with a certain mode of three numbers, and the implementation principle and details thereof are consistent with those of a single-mode dual-standby terminal, and are not described herein again.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (13)
1. A dual-mode dual-standby terminal, comprising: a mode A non-access stratum protocol stack, a mode B non-access stratum protocol stack, a mode A access stratum protocol stack and a mode B access stratum protocol stack,
it is characterized by also comprising: a first number non-access layer information unit, a second number non-access layer information unit, a first number access layer information unit and a second number access layer information unit;
the mode A non-access layer protocol stack and the mode B non-access layer protocol stack can access and update a number one non-access layer information unit and a number two non-access layer information unit, and can perform non-access layer processing on data streams and events of the number one and the number two;
the mode A access layer protocol stack and the mode B access layer protocol stack can access and update a number one access layer information unit and a number two access layer information unit, and can perform access layer processing on data streams and events of the number one and the number two; and the mode A access layer protocol stack and the mode B access layer protocol stack can carry out information interaction.
2. The dual-mode dual-standby terminal as claimed in claim 1, wherein the mode a access layer protocol stack is configured to obtain a mode B cell measurement result adjacent to the mode a serving cell from the mode B access layer protocol stack.
3. A dual mode dual standby terminal according to claim 1 or 2,
the method comprises the steps that a mode A access layer protocol stack providing service for a number one is used for sending an inter-mode switching notification to a mode B access layer protocol stack after receiving an inter-mode switching instruction sent by a network side;
and after receiving the notification of switching between the modes, the mode B access layer protocol stack for providing service for the number two accesses and updates the number one access layer information unit, and notifies the mode B non-access layer protocol stack to access and update the number one non-access layer information unit.
4. A dual mode dual standby terminal according to claim 3,
the mode B access layer protocol stack supports the service of a number two while performing the service switching process of the number one;
or,
and the mode B access layer protocol stack suspends the number two service after receiving the inter-mode switching notification, and resumes the number two service after the service switching process of the number one is finished.
5. A dual-mode dual-standby terminal according to any of claims 1 to 4, characterized in that said mode A non-access stratum protocol stack and mode B non-access stratum protocol stack are integrated functional entities.
6. A method for switching between modes of a dual-mode dual-standby terminal is characterized by comprising the following steps:
after receiving an inter-mode switching instruction sent by a network side, a mode A access layer protocol stack sends an inter-mode switching notification to a mode B access layer protocol stack;
after the mode B access layer protocol stack receives the notification of the switching between the modes, the mode B access layer protocol stack accesses the number I access layer information unit of the mode A service, and notifies the mode B non-access layer protocol stack to access the number I non-access layer information unit, and takes over the service of the number I.
7. The method of claim 6, further comprising:
the mode A access layer protocol stack acquires a mode B cell measurement result adjacent to a mode A service cell from the mode B access layer protocol stack, and the acquired mode B adjacent cell measurement result and the self-mode measurement result are combined into a measurement report to be sent to the network side.
8. The method of claim 6 or 7, further comprising:
the method comprises the steps of supporting the service of a number two while switching the service of the number one;
or,
and pausing the number two service after receiving the inter-mode switching notification, and resuming the number two service after the service switching process of the number one is finished.
9. A method for changing packet service cell between modes of dual-mode dual-standby terminal is characterized by comprising the following steps:
after receiving an inter-mode cell change instruction sent by a network side, a mode A access layer protocol stack sends an inter-mode cell change notification to a mode B access layer protocol stack;
and after receiving the inter-mode cell change notification, the mode B access layer protocol stack accesses the number I access layer information unit, notifies the mode B non-access layer protocol stack to access the number I non-access layer information unit, and takes over the service of the number I.
10. A method for reselecting a packet service cell between modes of a dual-mode dual-standby terminal is characterized by comprising the following steps:
when the mode A access layer protocol stack needs to perform packet service cell reselection, sending an inter-mode cell reselection notification to a mode B access layer protocol stack;
and after receiving the inter-mode cell reselection notification, the mode B access layer protocol stack accesses the number one access layer information unit, notifies the mode B non-access layer protocol stack to access the number one non-access layer information unit, and takes over the service of the number one.
11. A multimode multi-standby terminal can provide three modes of service for at least three numbers, wherein each mode corresponds to a non-access layer protocol stack and an access layer protocol stack; it is characterized in that the preparation method is characterized in that,
the non-access layer protocol stack corresponding to each mode can access and update the non-access layer information unit of each number, and can perform non-access layer processing on the data stream and the event of each number;
the access layer protocol stack corresponding to each mode can access and update the access layer information unit of each number, and can perform access layer processing on the data stream and event of each number, and the access layer protocol stacks corresponding to each mode can perform information interaction.
12. A single mode dual standby terminal, comprising:
a first number non-access stratum information element, a second number non-access stratum information element, a first number access stratum information element and a second number access stratum information element, and:
the non-access layer protocol stack is used for accessing and updating the first number non-access layer information unit or the second number non-access layer information unit and is also responsible for carrying out non-access layer processing on data streams and events of the first number and the second number;
the access layer protocol stack is used for accessing and updating the first number access layer information unit or the second number access layer information unit, and is also responsible for performing access layer processing on data streams and events of the first number and the second number;
the terminal also includes a transceiver responsible for receiving or transmitting the signaling and traffic data streams of the two numbers.
13. A single mode multi-standby terminal capable of providing a unified mode of service for at least three numbers,
each number corresponds to the same non-access layer protocol stack, access layer protocol stack and transceiver, and each number corresponds to a non-access layer information unit and an access layer information unit;
the non-access layer protocol stack can access and update non-access layer information units corresponding to all numbers, and is also responsible for performing non-access layer processing on data streams and events of all numbers; the access layer protocol stack can access and update the access layer information units corresponding to all numbers, and is also responsible for performing access layer processing on data streams and events of all numbers.
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| CN102065521B (en) * | 2009-11-17 | 2016-05-04 | 美国博通公司 | A kind of communication means and communication system |
| CN102209370B (en) * | 2010-03-31 | 2015-09-02 | 重庆重邮信科通信技术有限公司 | LTE multimode terminal has issued the method for circuit domain voice call at LTE access module |
| CN102421156B (en) * | 2011-08-05 | 2015-07-08 | 展讯通信（上海）有限公司 | Multi-card multi-standby mobile terminal and communication method thereof |
| CN102421206B (en) * | 2011-09-22 | 2014-11-19 | 展讯通信（上海）有限公司 | Multi-card multi-standby mobile terminal and communication method thereof |
| CN103313292B (en) * | 2012-03-15 | 2018-02-09 | 马维尔国际有限公司 | Inter-system measuring method based on single baseband chip dual link framework |
| CN102647763A (en) * | 2012-05-02 | 2012-08-22 | 中兴通讯股份有限公司 | Method and terminal used for conversion among models |
| CN104349410B (en) * | 2013-08-02 | 2018-03-23 | 中国移动通信集团公司 | Method for processing business, base station and multimode terminal |
| CN109743770A (en) * | 2013-08-30 | 2019-05-10 | 华为技术有限公司 | Processing method, user equipment and the network side equipment of non-access layer information |
| EP4075832B1 (en) | 2014-10-03 | 2024-07-10 | InterDigital Patent Holdings, Inc. | Device and method for restricted direct discovery |
| KR20160073171A (en) * | 2014-12-16 | 2016-06-24 | 삼성전자주식회사 | Method for providing communication service and electronic device thereof |
| CN108063834B (en) * | 2016-11-08 | 2021-05-11 | 展讯通信（上海）有限公司 | User terminal and method and device for providing mobile communication service |
| CN110138492B (en) * | 2018-02-08 | 2021-02-12 | 华为终端有限公司 | Cell search method and related equipment |
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