CN103124429B

CN103124429B - Be synchronized to the method and apparatus of non-master standard service carrying channel

Info

Publication number: CN103124429B
Application number: CN201110369341.2A
Authority: CN
Inventors: 王济勇; 房明; 赵旸
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2015-12-02
Anticipated expiration: 2031-11-18
Also published as: CN103124429A

Abstract

The embodiment of the present invention provides the method, device and the communication system that are synchronized to non-master standard service carrying channel, so that terminal is needing on the Radio Resource that can switch to non-master standard when accessing non-master standard by non-master standard bearer service.Described method comprises: terminal obtains determines the parameter being linked into the non-master standard service carrying channel moment; Described terminal determines according to described the parameter being linked into the non-master standard service carrying channel moment, determines the moment being linked into non-master standard service carrying channel; Described terminal, according to the described moment being linked into non-master standard service carrying channel, accesses described non-master standard service carrying channel.Method provided by the invention can realize the service carrying channel accessing to non-master standard from the service carrying channel of main standard exactly, and the Radio Resource of non-master standard can be utilized to carry out the transmission of business.

Description

Method and device for synchronizing to non-main service bearing channel

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for synchronizing to a non-primary service bearer channel.

Background

Since the spectrum resources of wireless communication have become very scarce resources at present, with the deployment of a fourth generation mobile communication network (4G), such as evolved universal terrestrial mobile telecommunications system (UMTS) radio access network (E-UTRAN), the network resources originally used for a second generation mobile communication network (2G), such as global system for mobile communications/enhanced data rates for GSM evolution (GSM evolution/enhanced data access for GSM evolution) or for a third generation mobile communication network (3G), such as Universal Terrestrial Radio Access Network (UTRAN), are reallocated, i.e., the spectrum resources of 2G or 3G are reduced to reserve the spectrum resources for the network, thereby reserving the spectrum resources for the network. 2G, 3G, and 4G are collectively referred to as different standards or Radio Access Technologies (RATs).

The GERAN network is deployed in units of 0.2 megahertz (MHz), the spectrum is divided into 8 slots (slots) for Time Division Multiplexing (TDMA), multiple 0.2MHz may share a set of common control channels, the set of common control channels is configured on a spectrum of 0.2MHz and occupies one or more slots, and the spectrum of 0.2MHz configured with the common control channels is called a broadcast control channel (BCCh, BroadcastControlChannel) carrier frequency. The common control channel is shared by a plurality of 0.2MHz channels, so that the overhead for channel control is reduced. In other words, one GERAN cell may be deployed over multiple 0.2MHz frequency spectrums, with only one BCCH carrier frequency being used to configure common control channels. UTRAN network deployment is currently in units of 5MHz bandwidth, while E-UTRAN network deployment is currently specified with spectrum bandwidths of 1.4MHz, 3MHz, 5MHz, 10MHz, 20MHz, etc., i.e., the bandwidth of one E-UTRAN cell is one of the fixed bandwidths described above. Whether GERAN, UTRAN or E-UTRAN, a cell has at least one complete set of common control channels. For example, in UTRAN, the common control channel occupies about 30% of the transmission power.

If an operator has deployed a 5.4MHz spectrum resource to a GERAN network, the reallocated 5MHz is used to deploy an E-UTRAN network, and this 0.4MHz spectrum can only be used for GERAN network deployment in order to utilize the remaining 0.4MHz spectrum. According to the current specification, a set of common control channels are allocated to the 5MHz E-UTRAN cell and the 0.4MHz GERAN cell respectively. The two sets of common control channels not only occupy time-frequency resources, but also occupy transmission power, and therefore, a method of a Multi-system cell (Multi-RATcell) is provided, namely, one cell supports two systems or more systems, and a plurality of systems share one set of common control channel to provide wireless services borne by the systems. In this way, spectrum resources for the common control channel are saved to improve spectrum utilization, and transmit power for the common control channel is saved to reduce interference to improve system capacity and system throughput. Specifically, a multi-system cell is deployed on a section of frequency spectrum, one system is selected as a master system, a set of completed common control channels is configured for the master system, a non-master system only provides a service channel and a dedicated control channel, and the service channel and the dedicated control channel provided by the non-master system are collectively referred to as a service-bearing channel (hereinafter referred to as a "service-bearing channel").

The division of the main system and the non-main system in the multi-system cell enables the common control channel and the service bearing channel to respectively perform their own functions. Specifically, the wireless connection initially established by the service is completed through the common control channel of the master system, and the service is actually carried by the selected service system. The access of the terminal from the common control channel of the master system to the service bearer channel allocated by the network needs to have the synchronization information synchronized to the service bearer channel. Similarly, if the terminal is switched from the master mode of the multi-mode cell to the non-master mode of the multi-mode cell, it also needs to have the synchronization information synchronized to the non-master mode service bearer channel. However, there is no scheme in the prior art for providing synchronization information from a synchronization channel to a non-master service bearer, which is required when a terminal switches from a master to a non-master of a multi-mode cell, or for providing a scheme for switching from a master to a non-master of a multi-mode cell.

Disclosure of Invention

The embodiment of the invention provides a method and a device for synchronizing to a non-master type service bearer channel, so that a terminal can switch to a non-master type wireless resource to bear a service by the non-master type when needing to access the non-master type service.

The embodiment of the invention provides a method for synchronizing to a non-master service bearer channel, which comprises the following steps: a terminal acquires a parameter for determining the moment of accessing to a non-master service bearer channel;

the terminal determines the moment of accessing the non-master service bearer channel according to the parameter determining the moment of accessing the non-master service bearer channel;

and the terminal accesses the non-master service bearer channel according to the moment of accessing the non-master service bearer channel.

The embodiment of the invention provides a method for synchronizing to a non-master service bearer channel, which comprises the following steps: the wireless access network node receives the request message or the measurement report;

and the wireless access network node sends a parameter for determining the moment when the terminal is accessed to the non-master service bearer channel according to the request message or the measurement report, so that the terminal determines the moment when the terminal is accessed to the non-master service bearer channel according to the parameter for determining the moment when the terminal is accessed to the non-master service bearer channel, and accesses the non-master service bearer channel according to the moment when the terminal is accessed to the non-master service bearer channel.

The embodiment of the invention provides a device for synchronizing to a non-master service bearer channel, wherein the device is a terminal device and comprises: the parameter acquisition module is used for acquiring parameters for determining the moment of accessing to the non-master service bearer channel;

the determining module is used for determining the moment of accessing the non-master service bearer channel according to the parameter which is acquired by the parameter acquiring module and is used for determining the moment of accessing the non-master service bearer channel;

and the access module is used for accessing the non-master service bearer channel according to the moment of accessing the non-master service bearer channel calculated by the calculation module.

The embodiment of the invention provides a device for synchronizing to a non-master service bearer channel, wherein the device is a wireless access network node and comprises: a receiving module, configured to receive a request message or a measurement report;

and the sending module is used for sending a parameter for determining the moment when the terminal is accessed to the non-master service bearer channel according to the request message or the measurement report, so that the terminal determines the moment when the terminal is accessed to the non-master service bearer channel according to the parameter for determining the moment when the terminal is accessed to the non-master service bearer channel, and accesses the non-master service bearer channel according to the moment when the terminal is accessed to the non-master service bearer channel.

It can be known from the foregoing embodiments of the present invention that, because the terminal can calculate the time of accessing to the non-primary service bearer channel according to the parameter that determines the time of accessing to the non-primary service bearer channel. Therefore, in a cell with multiple systems, the synchronization information of the non-master system service bearer channel is obtained equivalently by the terminal, the service bearer channel of the master system is accurately accessed to the service bearer channel of the non-master system, and the service can be transmitted by using the wireless resource of the non-master system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed in the prior art or the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art.

Fig. 1 is a schematic flowchart of a method for synchronizing to a non-master service bearer channel according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for synchronizing to a non-primary service bearer channel according to another embodiment of the present invention;

fig. 3 is a schematic view of an interaction flow between a terminal and a network device in a service establishment process of a multi-system cell according to an embodiment of the present invention;

fig. 4 is a schematic view of an interaction flow between a terminal and a network side device in a process of switching a multi-mode cell to a non-master mode according to an embodiment of the present invention;

fig. 5 is a schematic view of an interaction flow between a terminal and a network side device in a process of switching a multi-mode cell to a non-master mode according to an embodiment of the present invention;

fig. 6 is a schematic view of an interaction flow between a terminal and a network device in a process of switching a multi-mode cell to a non-master mode according to another embodiment of the present invention;

fig. 7 is a schematic view of an interaction flow between a terminal and a network device in a process of switching a multi-mode cell to a non-master mode according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of an apparatus for synchronizing to a non-master service bearer channel according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an apparatus for synchronizing to a non-primary traffic bearer channel according to another embodiment of the present invention;

fig. 10 is a schematic structural diagram of an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention;

fig. 11 is a schematic structural diagram of an apparatus for synchronizing to a non-primary traffic bearer channel according to another embodiment of the present invention;

fig. 12 is a schematic structural diagram of an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention;

fig. 13 is a schematic structural diagram of an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention;

fig. 14 is a schematic structural diagram of an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention;

fig. 15 is a schematic structural diagram of an apparatus for synchronizing to a non-primary traffic bearer channel according to another embodiment of the present invention;

fig. 16 is a schematic structural diagram of an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention;

fig. 17 is a schematic structural diagram of an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention;

fig. 18 is a schematic structural diagram of an apparatus for synchronizing to a non-primary traffic bearer according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one skilled in the art from the embodiments given herein are intended to be within the scope of the invention.

In order to explain the method for synchronizing to the non-master service bearer channel provided by the present invention, the present invention takes the example that the master mode in the existing multi-mode cell is E-UTRAN Frequency Division Duplex (FDD), and the non-master mode is UTRAN frequency division duplex and GERAN. It should be noted that, although the example is that the primary standard is E-UTRANFDD, and the non-primary standard is utran fdd and GERAN, those skilled in the art can understand that the method provided in the embodiment of the present invention may also be applied to a multi-standard cell in which the primary standard is not E-UTRANFDD, and the non-primary standard is not utran fdd and GERAN. Therefore, taking the E-UTRANFDD as the primary standard, the utran fdd as the non-primary standard, and the GERAN as examples, should not be taken as a limitation to the method for synchronizing to the non-primary standard service bearer channel provided by the present invention.

Referring to fig. 1, a schematic flow chart of a method for synchronizing to a non-master service bearer channel according to an embodiment of the present invention is shown, which mainly includes the following steps:

s101, a terminal acquires a parameter for determining the moment of accessing to a non-master service bearer channel.

For any system, there is a defined timing relationship between the common control channel and the traffic bearer channel, in other words, the common control channel and the traffic bearer channel within one system are synchronous, so as long as the time information of the radio frame of the common control channel (for example, the frame number of the radio frame and the start time thereof) is obtained, the time information of the traffic bearer channel can be obtained. In a multi-mode cell formed by E-UTRANFDD (master mode), UTRANFDD (non-master mode) and GERAN (non-master mode), the non-master mode does not have a corresponding common control channel. After the terminal obtains the timing information of the common control channel of the primary system of a multi-system cell, if the terminal wants to access to the service bearer channel of the non-primary system, the terminal needs to obtain the timing information between the common control channel of the primary system and the service bearer channel of the non-primary system, the information (such as the radio frame number and the starting time thereof) of the reference radio frame of the common control channel of the primary system and the information (such as the radio frame number) of the radio frame accessed to the service channel of the non-primary system, and the obtaining of the information is actually related to the parameter for determining the time of accessing to the service bearer channel of the non-primary system.

In the embodiment of the present invention, the determining the parameter of the moment of accessing to the non-master service bearer channel includes: master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERANAnd so on. Here, master reference frame number N_E-UTRANI.e. radio frame number, primary radio frame period T of E-UTRANFDD_{PeriodE-UTRAN}The time length of the radio frame is equal to that of the master mode E-UTRANFDD, namely 10ms (millisecond), and the period T of the radio frame of the non-master mode is T_PeriodGERANEqual to the duration of the non-master GERAN radio frame, i.e., 60/13ms (milliseconds), non-master referral frame number N_CurrentGERANI.e. non-master GERAN current radio frame number, non-master access frame number N_AccessGERANIs the radio frame number accessed to the non-master GERAN service bearing channel, and the value is from 0 to (N)_AccessRange-1).

Intuitively, if the current frame number and the starting time of the target channel are known, the target channel can be accessed from the source channel according to the current frame number and the starting time. However, the radio frame period and the frame number cycle period of the source channel and the target channel are sometimes different, and therefore, only knowing the current frame number and the starting time of the target channel sometimes cannot determine the time of accessing the target channel, and the target channel cannot be accessed accurately. In other words, if the frame number cycle periods of the source channel and the target channel can be integrated into the "same frame number cycle period", for example, the three frame number cycle periods of the source channel are converted into one frame number cycle period of the target channel by one parameter (that is, the time for the frame number of the source channel to cycle 3 times according to the original period is the same as the time for the frame number of the target channel to cycle 1 time according to the original period), the time for accessing the target channel can be determined by combining the obtained current frame number of the target channel, the starting time of the current frame number, and other parameters. Frame number matching parameter N in the preamble_CounterThe parameter is the parameter for converting the three frame number cycle periods of the source channel into the target channel through one parameter, or the frame number is matched with the parameter N_CounterThe role of the method is to match the frame number of the primary system (namely E-UTRANFDD) with the frame number of the non-primary system (namely GERAN),

matching parameter N for interpretation of frame number_CounterThe matching function of the invention is explained by taking the example that the main system is E-UTRANFDD, and the non-main systems are UTRANFDD and GERAN, and combining the related concepts.

The radio frames of all systems in a cell are assumed to have a common starting time, and the least common multiple of each radio frame period is taken as a least common multiple period, so that the starting time of each least common multiple period is the starting time of the radio frames of each system. If there is not a common wireless frame for all systems in a cellThe starting time, the starting time of each least common multiple period and the starting time of the wireless frame of each system correspondingly have a fixed offset P_o. In this case, when the time of accessing to the channel of the target bearer service is calculated, the calculation is performed according to the method that the radio frames of each system have a common starting time, and then a fixed offset P is correspondingly added to the calculation result_oAnd (4) finishing.

The periodicity of the E-UTRANFDD radio frame is 10ms (milliseconds), the periodicity of the UTRANFDD radio frame is also 10ms (milliseconds), and the periodicity of the GERAN radio frame is 60/13ms (milliseconds). The 60ms is the least common multiple period of the radio frames of the three systems, that is, the starting time of the radio frames of the three systems every 60ms is the same.

As the radio frame period of the primary E-UTRANFDD is the same as that of the non-primary UTRANFDD, as long as the frame number of the E-UTRAN radio frame and the starting time thereof are obtained, if the same frame number is assumed to be used by the UTRANFDD and the E-UTRANFDD, the starting time of the UTRANFDD service channel radio frame can be determined according to the frame number of the E-UTRANFDD channel.

The radio frame period of the E-UTRANFDD is different from that of the GERAN in the non-master mode, the System Frame Number (SFN) broadcasted by the E-UTRANFDD is 0-1023 (1023 is 1024-1), namely, the radio frame is circulated once every 1024 frames, and the radio frame is numbered from 0 to 1023; the frame numbers of GERAN broadcasts are 0-2715647 (2715647 ═ 2048 × 26 × 51-1), i.e. every 2715648 frames are cycled, and the radio frames are numbered from 0 to 2715647. From the frame number point of view, the E-utran fdd is identical every 3 cycles, i.e. a period of 3 1024 frames, to the period of 13 × 512 GERAN radio frames. Thus, a parameter N is set_CounterA loop for counting 1024E-UTRA FDD radio frames. N is a radical of_CounterIs 0, N every time the system frame number SFN of the E-utran fdd broadcast goes from 1023 to 0_CounterThe value of (c) is increased by 1 and modulo, i.e.,

N_Counter＝0，N_Counter＝(N_Counter+1)％3，if(((N_SFN+1)％1024)＝＝0)。

it should be noted that, since the time length of 3 × 1024E-UTRANFDD radio frames is 30.72s, this time length is sufficient for assigning a command for a channel carrying traffic or a handover command.

And S102, the terminal determines the moment of accessing the non-master service bearer channel according to the parameter determining the moment of accessing the non-master service bearer channel.

Because the parameter for determining the time when the terminal is accessed to the non-master service bearer channel can uniquely determine the time when the terminal is accessed to the non-master service bearer channel, in the embodiment of the invention, the time when the terminal is accessed to the non-master service bearer channel can be determined as long as the terminal obtains the parameter for determining the time when the terminal is accessed to the non-master service bearer channel. For convenience of explanation, the time of accessing to the non-primary traffic bearer is referred to as T in the following_AccessGERANAnd (4) showing.

As an embodiment of the invention, the time T of accessing to the non-main system service bearing channel_AccessGERANMay be calculated as:

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

...

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

N in equation 1_AccessGERAN、N_CurrentGERAN、N_AccessRangeAnd T_PeriodGERANThe parameters for determining the moment of accessing to the non-master service bearer channel, i.e. the non-master access frame number, the non-master reference frame number, the non-master access frame number value range and the non-master radio frame period, and T_CurrentGERANThe starting time of a specific radio frame of non-master mode (GERAN) is the time T of calculating the access to a non-master mode service bearing channel_AccessGERANAn intermediate parameter of (2). T is_CurrentGERANThis can be obtained from the following equation 2:

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

… … … (equation 2)

+(N_CurrentGERAN％13)×T_PeriodGERAN

T in equation 2_E-UTRAN、N_Counter、N_E-UTRANAnd T_{PeriodE-UTRAN}The parameters for determining the moment of accessing to the non-master service bearer channel, i.e. the starting moment of the master radio frame (here, E-UTRANFDD), the frame number matching parameter, the master reference frame number and the master radio frame period, respectively, wherein the starting moment T of the master radio frame is_E-UTRANMaster-capable reference frame number N_E-UTRANParameter N matched with frame number_CounterAnd (4) determining.

For a non-multi-system cell, a terminal can obtain the starting time of each radio frame of a serving cell (or an adjacent cell) through a cell identification process, and also can obtain the radio frame number of a common control channel. If the radio frame number of the accessed target channel is given in the assigned message, the time of accessing the target channel can be determined after the current frame number of the target channel and the starting time thereof are obtained.

For a multi-system cell, the access time of a target channel needs to be obtained according to the formula 1 and the formula 2, and the value range N of the non-master access frame number_AccessRangeRadio frame period T of main system_{PeriodE-UTRAN}And non-master radio frame period T_PeriodGERANThe parameters are constant or predefinable, rather than master access frame number N_AccessGERANUsually given by a command from the network, the master reference frame number N_E-UTRANUsually given by a command from the network or read by the terminal from the system message of the master. Thus, determining access to non-hosted trafficTime T of bearer channel_AccessGERANThe key is to know the current frame number and the starting time of the target channel (here, the non-master traffic bearer channel), i.e. the non-master reference frame number N_CurrentGERANAnd the starting time T of a certain non-master specific wireless frame_CurrentGERAN。

S103, the terminal accesses the non-master service bearer channel according to the calculated time when the terminal accesses the non-master service bearer channel.

It can be known from the foregoing embodiments of the present invention that, because the terminal can calculate the time of accessing to the non-primary service bearer channel according to the parameter that determines the time of accessing to the non-primary service bearer channel. Therefore, in the multi-system cell, the synchronous information of the non-main-system service bearer channel is obtained equivalently by the terminal, the service bearer channel or the control channel of the main system is accurately accessed to the service bearer channel of the target non-main system, and the service bearer channel of the target non-main system can also be accessed from the service bearer channel of the source non-main system, so that the service transmission is realized by using the wireless resource of the target non-main system.

As an embodiment of the present invention, the parameter for determining the time when the terminal accesses the non-primary service bearer channel may be an assignment radio channel command or a handover command issued by a network side device (for example, a radio access network node, etc.) received by the terminal. Here, the wireless channel assignment command is issued by the access network device when directly loading the service onto the non-primary channel in the service establishment process of the multi-system cell, and the switching command is issued by the access network device (e.g., a wireless access network node, etc.) of the source cell when the terminal switches between the primary system and the non-primary system (between the primary system and the non-primary system of the same cell or different cells, or between the non-primary systems). In this embodiment, the assignment of the radio channel command or the handover command may include a master type referral frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERANWherein, the radio frame period T of the main system_{PeriodE-UTRAN}The time length of the radio frame is equal to that of the master mode E-UTRANFDD, namely 10ms (millisecond), and the period T of the radio frame of the non-master mode is T_PeriodGERANThe time length of the non-master GERAN radio frame is equal to 60/13ms (millisecond), and the value range N of the non-master access frame number_AccessRangeIs the value range of the radio frame number of the accessed GERAN target channel.

In the service establishment process of the multi-system cell, another way for the terminal to obtain the parameter for determining the moment of accessing to the non-main-system service bearer channel may be: the terminal receives an assignment wireless channel command and a broadcast message sent by network side equipment, wherein the assignment wireless channel command comprises a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANFrame number matching parameter N_CounterAnd non-master access frame number value range N_AccessRange。

Radio frame period T due to master mode_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThe three parameters may be predefined, and therefore, in the service establishment process of the multi-system cell, another way for the terminal to obtain the parameter for determining the time when the terminal accesses the non-master-system service bearer channel may be: terminal acquires predefined master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThe rest parameters can be obtained through the wireless channel assignment command or the wireless channel assignment command and the broadcast message issued by the network side equipment, that is, the terminal receives the wireless channel assignment command issued by the network side equipment, and the wireless channel assignment command is issued by the network side equipmentThe command contains a non-master reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN(ii) a Or, the terminal receives an assignment wireless channel command and a broadcast message sent by the network side equipment, wherein the assignment wireless channel command comprises a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains the master reference frame number N_E-UTRANParameter N matched with frame number_Counter. In the service establishment process of the multi-system cell, a fourth way for the terminal to acquire the parameter at the time of determining the access to the non-main-system service bearer channel may be: the terminal receives a wireless channel assignment command issued by the network side equipment, wherein the wireless channel assignment command comprises a non-master reference frame number N_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_CounterAnd obtaining the predefined main system radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

When the terminal is switched between the master system and the non-master system or the non-master system, the terminal acquires the parameters for determining the moment of accessing the target non-master system service bearer channel, which have the following three modes:

the first method is as follows: the terminal receives a switching command and a broadcast message issued by the network side equipment, wherein the switching command comprises the non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains the master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANFrame number matching parameter N_CounterAnd non-master access frame number value range N_AccessRange；

The second method comprises the following steps: service establishment procedure in multi-system cellThe middle terminal obtains the parameters for determining the moment of accessing to the non-main service bearing channel, because the main wireless frame period T is similar_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThe three parameters can be predefined, so that the terminal acquires a predefined master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeAnd acquiring a parameter for determining the moment of accessing to a target non-master service bearer channel by receiving a switching command and a broadcast message issued by a network side, wherein the switching command comprises a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains the master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

The third method comprises the following steps: similar to the second method, the radio frame period T is determined by the master system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThe three parameters can be predefined, so that the terminal acquires a predefined master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange. Different from the second mode, the terminal may obtain the remaining parameters only by receiving the handover command issued by the network side device, that is, the terminal receives the handover command issued by the network side device, where the handover command includes the non-master reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

The terminal calculates the time of accessing the target non-master service bearer channel according to the parameter of determining the time of accessing the target non-master service bearer channel, and one embodiment of the terminal is that:

s1021, by master referenceFrame number N_E-UTRANParameter N matched with frame number_CounterDetermining the starting time T of the wireless frame of the main system_E-UTRAN；

After identifying the cell, the terminal refers to the frame number N according to the main system_E-UTRANParameter N matched with frame number_CounterI.e. determining the starting time T of the radio frame of the main system_E-UTRAN。

S1022, according to the starting time T of the wireless frame of the main system_E-UTRANFrame number matching parameter N_CounterMaster reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master reference frame number N_CurrentGERANAnd non-master radio frame period T_PeriodGERANCalculating the starting time T of a specific wireless frame of a target non-master system_CurrentGERANThe calculation formula is as follows:

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN；

s1023, according to the starting time T of a specific wireless frame of the non-main system_CurrentGERANNon-master access frame number N_AccessGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeAnd non-master radio frame period T_PeriodGERANCalculating the time T of accessing to the non-main service bearing channel_AccessGERANThe calculation formula is as follows:

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN。

for the terminal switching to the target non-master system, the terminal obtains two modes of determining the parameter of the moment of accessing to the target non-master system service bearer channel, and another embodiment of calculating the moment of accessing to the non-master system service bearer channel by the terminal according to the parameter of determining the moment of accessing to the target non-master system service bearer channel is as follows:

s' 1021, obtaining frame number N of current wireless frame of main system by synchronization of terminal and main system_SFNAnd a starting time T of the current radio frame_SFN；

S' 1022, the frame number N of the current wireless frame of the master mode_SFNAnd a starting time T of the current radio frame_SFNCalculating the starting time T of the wireless frame of the main system_E-UTRANThe calculation formula is as follows:

T_E-UTRAN＝T_SFN-((N_SFN-N_E-UTRAN+1024)％1024)×T_{PeriodE-UTRAN}；

s' 1023, according to the starting time T of the wireless frame of the main system_E-UTRANFrame number matching parameter N_CounterMaster reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master reference frame number N_CurrentGERANAnd non-master radio frame period T_PeriodGERANCalculating the starting time T of a specific wireless frame of a non-master system_CurrentGERANThe calculation formula is as follows:

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN；

s' 1024, according to the starting time T of a specific wireless frame of the non-master mode_CurrentGERANNon-master access frame number N_AccessGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeAnd non-master radio frame period T_PeriodGERANComputing access to non-hosted servicesTime T of bearer channel_AccessGERANThe calculation formula is as follows:

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

wherein the symbol "%" is a modulo arithmetic symbol.

Referring to fig. 2, a schematic flow chart of a method for synchronizing to a non-primary service bearer channel according to another embodiment of the present invention is shown, which mainly includes the following steps:

s201, the radio access network node receives a request message or a measurement report.

In the embodiment of the invention, the request message comprises a bearer establishment request message, the bearer establishment request message is issued to the radio access network node after a core network node receives a service request sent by a terminal in the service establishment process of a multi-system cell, and when a measurement report is switched to a non-master-system service bearer channel (including switching from a master system to a non-master system and between non-master systems in the same cell and switching from one cell to a non-master system of a target cell), the terminal measures a service cell, an adjacent cell and the current service bearer channel according to measurement control information provided by a network to obtain and upload the measurement control information to the radio access network node.

And S202, the wireless access network node sends and determines the parameter of the moment when the terminal is accessed to the non-main service bearing channel according to the request message or the measurement report.

In the conventional handover procedure, the handover command generally includes information about the time when the target channel is accessed, e.g., the number of the accessed radio frame. For the intra-cell switching, the terminal already obtains the time sequence relation between the common control channel and the service channel of the service cell, the frame number of the current wireless frame and the initial time thereof, and the terminal can determine the time to access the target channel according to the information; for the switching between the cells, the terminal can determine the frame number and the initial time of the wireless frame of the current common control channel of the adjacent target cell according to the information obtained in the cell identification and/or measurement process before the switching, and then can determine the time for accessing the target channel according to the frame number of the accessed target channel in the switching command. If the terminal cannot determine the time information of the common control channel of the target cell before handover, the time information of the common control channel of the target cell is determined first, for example, through a cell identification procedure. The mode of determining the time of accessing the target channel in the service establishment process is the same as the switching process in the cell.

In an embodiment provided by the present invention, the parameter for the radio access network node to determine the time when the terminal accesses the non-primary service bearer channel according to the request or the measurement report transmission may be: and the wireless access network node issues a wireless channel assignment command to the terminal according to the bearing establishment request message or issues a switching command to the terminal according to the measurement report. The bearing establishment request message comprises an indication that the terminal supports the multi-system cell, wherein the assigned wireless channel command or the switching command comprises a main system reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN. Therefore, the wireless access network node can send and determine the parameter of the moment when the terminal accesses to the target non-main service bearer channel according to the bearer establishment request message in the mode.

Radio frame period T due to master mode_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters may be predefined. Therefore, in another embodiment of the invention, the radio access network node determines from said request message or measurement report transmissionThe parameters of the moment when the terminal accesses the non-main service bearer channel may be: a wireless access network node sends a broadcast message to a terminal and sends an assignment wireless channel command to the terminal according to a bearing establishment request message, wherein the bearing establishment request message comprises an indication that the terminal supports a multi-mode cell, and the assignment wireless channel command comprises a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_CounterIn this way, the parameter for determining the moment when the terminal accesses to the non-main service bearer channel can be sent according to the bearer establishment request message.

In another embodiment of the present invention, the radio access network node does not need to send a broadcast message, and only needs to send an assignment radio channel command to the terminal according to the bearer establishment request message, or send a handover command to the terminal according to the measurement report, where the bearer establishment request message includes an indication that the terminal supports a multi-mode cell, and the assignment radio channel command or the handover command includes a non-master mode reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN. By the method, the parameter of the moment when the terminal is accessed to the non-main service bearer channel can be determined according to the bearer establishment request message, the switching request message or the measurement report.

Obviously, if the radio frame period T of the main system is T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeIf the three parameters are not given in a predefined manner, in an embodiment where the radio access network node issues a broadcast message to the terminal and issues an assignment radio channel command to the terminal according to the bearer establishment request message, the broadcast message issued by the radio access network node to the terminal still needs to include the radio frame period T of the master system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters.

In one embodiment of the invention, when the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeWhen the three parameters are predefined, the parameters for determining the moment of accessing to the non-main service bearing channel are issued to the terminal by the wireless access network node according to the measurement report, and the parameters comprise: the wireless access network node determines a target cell for switching according to the measurement report; the wireless access network node sends a switching command and a broadcast message to the terminal, wherein the switching command comprises an indication that a target system is a non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

If the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeIf the three parameters are not given in a predefined manner, in an embodiment in which the radio access network node issues a parameter to the terminal according to the measurement report, the parameter determining the time when the radio access network node accesses to the non-master service bearer channel, the broadcast message issued by the radio access network node to the terminal further includes a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

For the situation of the non-master type between cells and switching to the target cell, the radio access network node in the above embodiment may be a source cell radio access network node, and the request message received by the radio access network node includes a switching request message and a switching request response message, at this time, the parameter that the radio access network node sends and determines the time when the terminal accesses to the non-master type service bearer channel according to the request message or the measurement report includes: s2021, thenThe source cell radio access network node determines that a target cell to be switched is a multi-standard cell according to the measurement report and sends a switching request message to the source cell core network node; s2022, the source cell wireless access network node generates a switching command according to a switching request response message sent by the source cell core network node; s2023, the source cell wireless access network node sends a broadcast message and a switching command to the terminal, and the switching command comprises an indication that the target mode is a non-master mode and a non-master mode reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_CounterThe switching command may further include a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

It should be noted that the radio frame period T is determined by the master radio system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters may be predefined, and therefore, in the embodiments from step S2021 to step S2023, the broadcast message sent by the source cell radio access network node may not include the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters. If the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeIf the three parameters are not given in a predefined manner, in the embodiments from step S2021 to step S2023, the broadcast message sent by the source cell radio access network node should also include the radio frame period T of the primary system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters.

For the situation of the non-master type between cells and switching to the target cell, the radio access network node in the above embodiment may be a target cell radio access network node, and the request message received by the radio access network node includes a switching request message and a switching request response message, at this time, the parameter that the radio access network node determines the time when the terminal accesses to the non-master type service bearer channel according to the request message or the measurement report includes: s' 2021, the target cell wireless access network node receives a switching request message sent by the target cell core network node; s' 2022, the target cell wireless access network node generates a switching request response message according to the switching request message sent by the target cell core network node; and S' 2023, the target cell wireless access network node sends the switching request response message to a target cell core network node, so that the target cell core network node issues a parameter, which is included in the switching request response message and determines a time when the terminal is accessed to a non-main service bearer channel, to the terminal through a source cell core network node and the wireless access network node.

It should be noted that the radio frame period T is determined by the master radio system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters may be predefined, and therefore, in the embodiment of step S' 2023, the request response message issued by the target radio access network node may not include the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThe three parameters only need to contain an indication that the target system is a non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_CounterAnd sending down through broadcast messages. Of course, the information may not be sent through a broadcast message, that is, the request response message sent by the target radio access network node needs to include an indication that the target system is the non-master system and the non-master system reference frame number N_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANMatching with frame numberParameter N_Counter。

The method for synchronizing to the non-master service bearer channel provided by the embodiment of the invention is further described by interaction between the terminal and the network side device, taking the service establishment process of the multi-standard cell, switching to the non-master in the multi-standard cell and switching to the non-master between the multi-standard cells as examples.

Referring to fig. 3, a schematic view of an interaction flow between a terminal and a network device in a service establishment process of a multi-system cell according to an embodiment of the present invention is shown, which mainly includes the following steps:

s301, the terminal acquires information required by the access master system through the broadcast message;

in this embodiment, the terminal is a terminal supporting a multi-system cell, and the terminal uses a flow of a conventional terminal residing in a main-system conventional cell to reside in a multi-system cell, and reads broadcast information of the cell, thereby acquiring information required for accessing the main system. Optionally, if the broadcast information of the cell includes the parameter N_E-UTRANAnd parameter N_CounterThen the terminal can also obtain the reference frame number N of the main system_E-UTRANParameter N matched with frame number_Counter。

S302, the terminal uploads the wireless access capability;

the terminal uploads the wireless access capability of the terminal is mainly completed by the process of establishing wireless connection to the master system on the common control channel of the master system. In the process of establishing the wireless connection, the terminal uploads the wireless access capability of the terminal to the core network node, wherein the wireless access capability comprises an indication that the terminal supports a multi-mode cell. Optionally, the radio access capability of the terminal may also be transferred to the radio access network node by the core network node after being uploaded to the core network node.

S303, the terminal sends a service request to the wireless access network node;

the service request sent by the terminal to the radio access network node is then passed to the core network node via said radio access network node.

S304, the core network node sends a bearing establishment request message to the wireless access network node;

the bearer establishment request message sent by the core network node to the radio access network node contains service quality information of a service and/or the radio access capability of the terminal, wherein the radio access capability of the terminal comprises an indication that the terminal supports a multi-mode cell.

S305, the wireless access network node sends a wireless channel assignment command to the terminal;

and the wireless access network node selects a service standard (servingRAT) and distributes a service bearing channel for the selected service standard according to one or more of the service quality requirement of the requested service, the wireless access capability of the terminal and the load information of each standard. The wireless access network node issues the information of the selected service system and the service bearing channel distributed on the service system to the terminal by assigning a wireless channel command, wherein the assigned wireless channel command comprises a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThese two parameters. Optionally, if the broadcast information of the cell in step S301 does not include the primary system reference frame number N_E-UTRANParameter N matched with frame number_CounterThe wireless channel assignment command issued by the node of the wireless access network to the terminal may also include the primary reference frame number N_E-UTRANParameter N matched with frame number_CounterThese two parameters.

S306, the terminal accesses to the service bearing channel of the service system according to the information contained in the wireless channel assignment command.

In this embodiment, the service system is the master system.

Fig. 4 is a schematic view of an interaction flow between a terminal and a network device in a process of switching a multi-mode cell to a non-master mode according to an embodiment of the present invention.

To say thatIt is clear that, if the terminal switches in the same non-master system, since the channels in one system are all synchronous and the terminal has already obtained the frame number of the current radio frame and its starting time, at this time, as long as the accessed frame number is given in the switching command, the terminal can determine the time of accessing to the target channel, and this process is the same as the conventional process. In such intra-cell handover, the SourceRAN assumes two roles of a source cell radio access network node and a target radio access network node, the source cell radio access network node is responsible for selecting a target cell, and the target radio access network node is responsible for selecting a target system in the target cell, allocating a channel for carrying a service, and providing parameters for calculating a time for accessing to the target channel. If the modes are switched in a multi-mode cell and the target mode is a non-master mode, the terminal needs to acquire a master mode reference frame number N_E-UTRANFrame number matching parameter N_CounterNon-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe parameters are used to determine the time to access the target channel, and the detailed steps are shown in fig. 4 and described as follows:

s401, the terminal uploads a measurement report to a wireless access network node;

the terminal supporting the multi-system cell (except for special description, the terminals mentioned in the embodiment of the present invention refer to terminals supporting the multi-system cell) measures the serving cell, the neighboring cell and the current service bearer channel according to the measurement control information provided by the network, and reports the measurement report to the radio access network node. Optionally, the primary standard of the serving cell may also be used as a conventional neighbor cell for measurement and reporting, where the measurement process includes procedures required for conventional neighbor cell measurement, such as cell identification, signal strength measurement, and signal quality measurement. The measurement control information may be provided by a broadcast message transmitted by a broadcast channel and/or a measurement control command transmitted by a dedicated channel. If the broadcast message contains the master reference frame number N_E-UTRANParameter N matched with frame number_CounterThe terminal can also obtain the two parameters through a command issued by a special channelMaster reference frame number N_E-UTRANParameter N matched with frame number_Counter。

S402, the wireless access network node determines a target cell for switching;

and the access network node supporting the multi-mode cell determines the mode of the switched target cell to be a non-master mode according to the measurement report reported by the terminal.

S403, the wireless access network node issues a switching command to the terminal;

in this embodiment, the handover command issued by the radio access network node to the terminal includes indication information of the non-master system (i.e. target system), information of the service bearer channel allocated for the non-master system, and a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. Optionally, the master reference frame number N may also be used_E-UTRANParameter N matched with frame number_CounterThese two parameters are included in the issued handover command.

S404, the terminal determines the access time of the access target channel according to the information in the switching command and accesses the target channel at the access time;

the terminal determines the non-main system and the service bearing channel distributed for the non-main system according to the information in the switching command, and the terminal refers to the frame number N according to the non-main system_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_CounterThe parameters are calculated to obtain the access time of the access target channel, and the access target channel (i.e. the traffic bearer channel allocated in the non-primary mode) is accessed at the calculated access time, and the specific calculation formula may refer to formula 2 illustrated in fig. 1, which is not described herein again.

It should be noted that, if the terminal cannot obtain the frame number N referred by the master system_E-UTRANParameter N matched with frame number_CounterDetermined starting time T of master system radio frame_E-UTRANIf the terminal needs to acquire the master system synchronously with the master systemFrame number N of standard current radio frame_SFNAnd its starting time. Then, from the formula T_E-UTRAN＝T_SFN-((N_SFN-N_E-UTRAN+1024)％1024)×T_{PeriodE-UTRAN}Calculating the starting time T of the wireless frame of the main system_E-UTRANAnd the time instant of accessing the target channel is calculated by equation 2 illustrated in fig. 1.

Fig. 5 is a schematic view of an interaction flow between a terminal and a network device in a process of switching a multi-mode cell to a non-master mode according to an embodiment of the present invention. Fig. 5 illustrates a cross-cell handover, where a target system of the handover is a non-master system of a target multi-system cell, and a source cell and a target cell do not belong to the same core network node, that is, the source cell belongs to a source cell core network node, and the target cell belongs to a target cell core network node. The switching between the multi-mode cells illustrated in fig. 5 to the non-master mode mainly includes the following steps:

s501, the terminal measures adjacent cells of multiple systems;

and the terminal measures the adjacent cells of the multi-system according to the measurement control information provided by the network. Optionally, the measurement and report may also be performed on a conventional neighboring cell using the primary standard of the serving cell as the primary standard, where the measurement process includes procedures required for the conventional neighboring cell measurement, such as cell identification, signal strength measurement, and signal quality measurement. The measurement control information may be provided by a broadcast message transmitted by a broadcast channel and/or a measurement control command transmitted by a dedicated channel.

S502, the terminal uploads a measurement report to a source cell wireless access network node;

the measurement report uploaded by the terminal to the source cell radio access network node comprises measurement information obtained when the multi-system adjacent cell is measured.

S503, the source cell wireless access network node determines a target cell for switching;

and the source cell wireless access network node supporting the multi-system cell determines that the switched target cell is the multi-system cell according to the measurement report reported by the terminal.

S504, the source cell wireless access network node sends a first switching request message to the source core network node;

the first switching request message contains a target multi-system cell to be switched and can also contain an indication that the terminal supports the multi-system cell.

S505, the source core network node generates a forward relocation request (Forwardrelocation request) message and sends the forward relocation request message to the target core network node;

and the source core network node generates a 'forwardRelocationRequest' message according to the first switching request message and sends the message to the target core network node.

S506, the target core network node generates a second switching request message and sends the second switching request message to the target wireless access network node;

and the target core network node generates a second switching request message according to the received ForwardRelocationRequest message and sends the second switching request message to the target wireless access network node.

S507, the target wireless access network node generates a second switching request response message and sends the second switching request response message to the target core network node;

and the target radio access network node determines the target mode of the handover to be the non-master mode according to information in the second handover request message, for example, information such as the radio access capability (including an indication for supporting a multi-mode cell) of the target cell and the terminal, the load of the target cell and the like, and generates a "second handover request response (HandoverRequestAck)" message to be sent to the target core network node. The message of 'HandoverRequestAck' comprises indication information of a target non-master system, information of a service bearing channel distributed in the target non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. Optionally, a master reference frame number N_E-UTRANParameter N matched with frame number_CounterThese two parameters may also be included inThe second handover request response message.

S508, the target core network node sends a forward relocation response (Forward relocation response) message to the source core network node;

and the target core network node generates a forward relocation response (forwardrelocation response) message according to the second switching request response message and sends the forward relocation response message to the source core network node.

S509, the source core network node sends a first switching request response message to the source cell wireless access network node;

and the source core network node generates a first switching request response (HandoverRequiredJack) message according to the forward relocation response message and sends the first switching request response (HandoverRequiredJack) message to the source cell radio access network node.

S510, the source cell wireless access network node issues a switching command to the terminal;

the source cell radio access network node generates a switching command according to a 'first switching request response (HandoverRequiredDick)' message and sends the switching command to a terminal, wherein the switching command comprises indication information of a non-master system (namely a target system), information of a service bearing channel allocated for the non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. Optionally, the master reference frame number N may also be used_E-UTRANParameter N matched with frame number_CounterThese two parameters are included in the issued handover command.

S511, the terminal determines the access time of the access target channel according to the information in the switching command and accesses the target channel at the access time;

It should be noted that, if the terminal cannot obtain the frame number N referred by the master system_E-UTRANParameter N matched with frame number_CounterDetermined starting time T of master system radio frame_E-UTRANIf the terminal needs to obtain synchronization with the master system to obtain the frame number N of the current radio frame of the master system_SFNAnd its starting time. Then, from the formula T_E-UTRAN＝T_SFN-((N_SFN-N_E-UTRAN+1024)％1024)×T_{PeriodE-UTRAN}Calculating the starting time T of the wireless frame of the main system_E-UTRANAnd the time instant of accessing the target channel is calculated by equation 2 illustrated in fig. 1.

Fig. 6 is a schematic view of an interaction flow between a terminal and a network device in a process of switching a multi-mode cell to a non-master mode according to an embodiment of the present invention. Fig. 6 illustrates a cross-cell handover, where the target system of the handover is a non-master system of a target multi-system cell. Unlike the example of fig. 5, in the cross-cell handover illustrated in fig. 6, the source cell and the target cell belong to the same core network node, and at this time, signaling interaction between the source core network node and the target core network node is not required, however, the core network node at this time plays roles of the source core network node and the target core network node, that is, plays a role of the source core network node when interacting with the source cell radio access network node in signaling, and plays a role of the target core network node when interacting with the target radio access network in signaling. The switching between the multi-mode cells illustrated in fig. 6 to the non-master mode mainly includes the following steps:

s601, the terminal measures adjacent cells of multiple systems;

S602, the terminal uploads a measurement report to a source cell wireless access network node;

S603, the source cell wireless access network node determines a target cell for switching;

S604, the source cell wireless access network node sends a first switching request message to a core network node;

S605, the core network node generates a second switching request message and sends the second switching request message to a target wireless access network node;

and the core network node generates a second switching request message according to the first switching request message and sends the second switching request message to the target wireless access network node.

S606, the target wireless access network node generates a second switching request response message and sends the second switching request response message to the core network node;

the target radio access network node determines the target mode of the handover to be the non-primary mode according to the information in the second handover request message, for example, the information of the target cell, the wireless access capability of the terminal (including the indication of supporting the multi-mode cell) and the information of the target cell, such as the information of the load of the target cell, and the likeAnd generating a second switching request response (HandoverRequestAck) message and sending the message to the core network node. The message of 'HandoverRequestAck' comprises indication information of a target non-master system, information of a service bearing channel distributed in the target non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. Optionally, a master reference frame number N_E-UTRANParameter N matched with frame number_CounterThese two parameters may also be included in the second handover request response message.

S607, the core network node sends a first switching request response message to the source cell wireless access network node;

and the core network node generates a first handover request response (HandoverRequireddAck) message according to the second handover request response message and sends the message to the source cell radio access network node.

S608, the source cell wireless access network node issues a switching command to the terminal;

S609, the terminal determines the access time of the access target channel according to the information in the switching command and accesses the target channel at the access time;

the terminal determines the non-main system and the service bearing channel distributed for the non-main system according to the information in the switching command, and the terminal refers to the frame number N according to the non-main system_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANAnd frame numberMatching parameter N_CounterThe parameters are calculated to obtain the access time of the access target channel, and the access target channel (i.e. the traffic bearer channel allocated in the non-primary mode) is accessed at the calculated access time, and the specific calculation formula may refer to formula 2 illustrated in fig. 1, which is not described herein again.

Fig. 7 is a schematic view of an interaction flow between a terminal and a network device in a process of switching a multi-mode cell to a non-master mode according to an embodiment of the present invention. Unlike the examples of fig. 4 to 6, fig. 7 illustrates a cross-cell handover based on an interface between access network nodes, and a target system of the handover is a non-master system of a multi-system cell. The terminal can obtain the synchronous information of the adjacent target multi-system cell master system according to the currently defined procedure, namely the initial time of each wireless frame, and can also obtain the master system reference frame number N by reading the system information_E-UTRANParameter N matched with frame number_Counter. The switching between the multi-mode cells illustrated in fig. 7 to the non-master mode mainly includes the following steps:

s701, the terminal measures adjacent cells of multiple systems;

S702, the terminal uploads a measurement report to a source cell wireless access network node;

S703, the source cell wireless access network node determines a target cell for switching;

S704, the source cell wireless access network node sends a switching request message to the target wireless access network node;

the switching request message contains a target multi-system cell to be switched and can also contain an indication that the terminal supports the multi-system cell.

S705, the target wireless access network node generates a switching request response message and sends the switching request response message to the source cell wireless access network node;

and the target radio access network node determines the target mode of the handover to be a non-master mode according to information in the handover request message, such as information of the target cell, the radio access capability of the terminal (including an indication for supporting the multi-mode cell), the load of the target cell and the like, and generates a handover request response (HandoverRequestAck) message to be sent to the source cell radio access network node. The message of 'HandoverRequestAck' comprises indication information of a target non-master system, information of a service bearing channel distributed in the target non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. Optionally, a master reference frame number N_E-UTRANParameter N matched with frame number_CounterThese two parameters may also be included in the handover requestAnd solving the response message.

S706, the source cell wireless access network node sends a switching command to the terminal;

the source cell radio access network node generates a switching command according to a handover request response (HandoverRequiredRack) message and sends the switching command to the terminal, wherein the switching command comprises indication information of a non-master system (namely a target system), information of a service bearing channel allocated for the non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. Optionally, the master reference frame number N may also be used_E-UTRANParameter N matched with frame number_CounterThese two parameters are included in the issued handover command.

S707, the terminal determines the access time of the access target channel according to the information in the switching command and accesses the target channel at the access time;

It should be noted that, if the terminal cannot obtain the frame number N referred by the master system_E-UTRANParameter N matched with frame number_CounterDetermined starting time T of master system radio frame_E-UTRANIf the terminal needs to obtain synchronization with the master system to obtain the frame number N of the current radio frame of the master system_SFNAnd its starting time. Then, from the formula T_E-UTRAN＝T_SFN-((N_SFN-N_E-UTRAN+1024)％1024)×T_{PeriodE-UTRAN}Calculating the starting time T of the wireless frame of the main system_E-UTRANAnd is illustrated by the accompanying figure 1Equation 2 calculates the time when the target channel is accessed.

The common control channel of the main system in a multi-system cell and the service channel of the main system are directly synchronous. In general, a common control channel and a traffic channel of one system are driven by the same clock according to a predefined timing relationship. Since the radio frame period (and/or slot period) of other traffic in non-master mode is different from that in master mode, different clocks may be used in different modes. Due to a certain degree of deviation between different clocks, the reason for this may be due to the different crystal oscillators used.

In order to maintain a predetermined timing relationship between radio frames of different systems, for example, the radio frames of each system use the starting time of each least common multiple period as their respective starting times, and it is necessary to synchronize clocks of each system at certain time intervals. For example, each clock of the non-master system is synchronized with the clock of the master system once according to the predefined number of least common multiple cycles as the synchronization interval. If a multi-system cell has a plurality of main systems, one main system is selected as a synchronous reference at first, and other systems are synchronous with the main system as the synchronous reference at a certain time interval. In addition, a mode exists, namely, each system adopts a clock of a GPS, and thus, the GPS is used as a reference clock to ensure the synchronization of wireless frames of different systems.

Fig. 8 is a schematic structural diagram of a device for synchronizing to a non-primary service bearer channel according to an embodiment of the present invention. For convenience of explanation, only portions related to the embodiments of the present invention are shown. The apparatus for synchronizing to a non-master service bearer channel illustrated in fig. 8 may be a terminal device, and includes a parameter obtaining module 801, a determining module 802, and an access module 803, where:

a parameter obtaining module 801, configured to obtain a parameter at a time when a non-master service bearer channel is determined to be accessed;

a determining module 802, configured to determine, according to the parameter obtained by the parameter obtaining module 801, a time when the non-master service bearer channel is accessed;

an access module 803, configured to access the non-primary service bearer channel according to the time, calculated by the determination module 802, of accessing the non-primary service bearer channel;

in the apparatus for synchronizing to a non-primary service bearer channel illustrated in fig. 8, determining a parameter at a time when the non-primary service bearer channel is accessed includes: master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

The parameter obtaining module 801 illustrated in fig. 8 may include a first receiving unit 901, which is an apparatus for synchronizing to a non-primary traffic bearer according to another embodiment of the present invention shown in fig. 9. The first receiving unit 901 is configured to receive an assignment radio channel command or a handover command issued by a network side device.

The parameter obtaining module 801 illustrated in fig. 8 may further include a predefined parameter obtaining unit 1001 and a second receiving unit 1002, as shown in fig. 10, the apparatus for synchronizing to a non-master service bearer channel according to another embodiment of the present invention, where:

a predefined parameter obtaining unit 1001 configured to obtain a predefined parameter;

the second receiving unit 1002 is configured to receive a broadcast message sent by a network side device.

The non-master reference frame number N is carried in the command for assigning radio channels or the command for switching sent by the first receiving unit 901 in the example of fig. 9_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message received by the second receiving unit 1002 in the example of fig. 10 carries the master mode referenceFrame number N_E-UTRANParameter N matched with frame number_CounterThe predefined parameter acquired by the predefined parameter acquiring unit 1001 includes a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

In another embodiment of the present invention, the radio channel assignment command or the handover command issued by the first receiving unit 901 shown in fig. 9 carries the radio frame period T of the primary system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

In another embodiment of the present invention, the non-master reference frame number N is carried in the command for assigning a radio channel or the command for switching sent by the first receiving unit 901 shown in fig. 9_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message received by the second receiving unit 1002 in the example of fig. 10 carries the master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANFrame number matching parameter N_CounterAnd non-master access frame number value range N_AccessRange。

In yet another embodiment of the present invention, the non-master reference frame number N in the command for assigning radio channels or the command for switching sent by the first receiving unit 901 shown in fig. 9_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_CounterThe predefined parameter acquired by the predefined parameter acquiring unit 1001 in the example shown in fig. 10 includes a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

The determining module 802 provided in any embodiment of fig. 8 to fig. 10 may include a determining unit 1101, a first calculating unit 1102 and a second calculating unit 1103, as shown in fig. 11, the apparatus for synchronizing to a non-primary service bearer channel according to another embodiment of the present invention, where:

a determining unit 1101 for referring to a frame number N by the master system_E-UTRANParameter N matched with frame number_CounterDetermining the starting time T of the wireless frame of the main system_E-UTRAN；

A first calculating unit 1102, configured to calculate a start time T according to the wireless frame of the primary system_E-UTRANFrame number matching parameter N_CounterMaster reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master reference frame number N_CurrentGERANAnd non-master radio frame period T_PeriodGERANCalculating the starting time T of a specific wireless frame of a non-master system_CurrentGERANThe calculation formula is as follows:

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN；

a second calculating unit 1103, configured to calculate a starting time T of a specific wireless frame according to the non-master type_CurrentGERANNon-master access frame number N_AccessGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeAnd non-master radio frame period T_PeriodGERANCalculating the time T of accessing to the non-main service bearing channel_AccessGERANThe calculation formula is as follows:

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

wherein the symbol "%" is a modulo arithmetic symbol.

The determining module 802 provided in any embodiment of fig. 8 to fig. 11 may include a first obtaining unit 1201, a third calculating unit 1202, a fourth calculating unit 1203, and a fifth calculating unit 1204, as shown in fig. 12, the apparatus for synchronizing to a non-master service bearer channel provided in another embodiment of the present invention, where:

a first obtaining unit 1201, configured to obtain a frame number N of a current radio frame of a master system through synchronization between the terminal and the master system_SFNAnd a starting time T of the current radio frame_SFN；

A third calculating unit 1202 for calculating the frame number N of the current radio frame from the master system_SFNAnd a starting time T of the current radio frame_SFNCalculating the starting time T of the wireless frame of the main system_E-UTRANThe calculation formula is as follows:

T_E-UTRAN＝T_SFN-((N_SFN-N_E-UTRAN+1024)％1024)×T_{PeriodE-UTRAN}；

a fourth calculating unit 1203, configured to calculate a start time T of the wireless frame according to the master system_E-UTRANFrame number matching parameter N_CounterMaster reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master reference frame number N_CurrentGERANAnd non-master radio frame period T_PeriodGERANCalculating the starting time T of a specific wireless frame of a non-master system_CurrentGERANThe calculation formula is as follows:

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN；

a fifth calculating unit 1204, configured to calculate a starting time T of a specific wireless frame according to the non-master system_CurrentGERANNon-master access frame number N_AccessGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeAnd non-master radio frame period T_PeriodGERANCalculating the time T of accessing to the non-main service bearing channel_AccessGERANThe calculation formula is as follows:

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

wherein the symbol "%" is a modulo arithmetic symbol.

Fig. 13 is a schematic structural diagram of a device for synchronizing to a non-primary service bearer channel according to an embodiment of the present invention. For convenience of explanation, only portions related to the embodiments of the present invention are shown. The apparatus for synchronizing to a non-master traffic bearer channel illustrated in fig. 13 may be a radio access network node, which includes a receiving module 1301 and a transmitting module 1302, where:

a receiving module 1301, configured to receive a request message or a measurement report;

a sending module 1302, configured to send a parameter that determines a time when the terminal accesses the non-primary-system service bearer channel according to the request message or the measurement report, so that the terminal determines a time when the terminal accesses the non-primary-system service bearer channel according to the parameter that determines the time when the terminal accesses the non-primary-system service bearer channel, and accesses the non-primary-system service bearer channel according to the time when the terminal accesses the non-primary-system service bearer channel.

The request message received by the receiving module 1301 may include a bearer establishment request message, and the transmitting module 1302 in the example in fig. 13 may include a first issuing unit 1401, which is an apparatus for synchronizing to a non-master traffic bearer channel according to another embodiment of the present invention shown in fig. 14. The first issuing unit 1401 is configured to issue an assignment radio channel command to the terminal according to the bearer establishment request message, or issue a handover command to the terminal according to the measurement report.

The transmitting module 1302 shown in fig. 14 may further include a broadcasting unit 1501, such as the apparatus for synchronizing to the non-master traffic bearer channel provided in another embodiment of the present invention shown in fig. 15. The broadcast unit 1501 is used to transmit broadcast messages.

The bearer establishment request message received by the receiving module 1301 in the example in fig. 13 includes an indication that the terminal supports a multi-system cell, and the assignment radio channel command or the handover command issued by the first issuing unit 1401 in the example in fig. 14 includes a master system reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

If the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters are predefined by the terminal, and the command for assigning radio channels or the command for switching sent by the first issuing unit 1401 in the example of fig. 14 may only include the non-master type referral frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANIn the example shown in fig. 15, the broadcast message sent by the broadcast unit 1501 may only include the master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

If the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters are not predefined by the terminal, thenBroadcast unit 1501 of the example of fig. 15 issues a broadcast message except that it contains a master-mode referral frame number N_E-UTRANParameter N matched with frame number_CounterBesides, it also needs to contain the radio frame period T of the master system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

If the radio access network node illustrated in fig. 13 is a source cell radio access network node, the request message received by the receiving module 1301 includes a handover request message and a handover request response message, the apparatus for synchronizing to a non-host service bearer channel illustrated in fig. 13 further includes a handover request message sending unit 1601 and a handover command generating unit 1602, as shown in fig. 16, the apparatus for synchronizing to a non-host service bearer channel according to another embodiment of the present invention is provided, wherein:

a handover request message sending unit 1601, configured to determine a target cell to be handed over according to a measurement report and send a handover request message to the source cell core network node;

a handover command generating unit 1602, configured to generate a handover command according to a handover request response message sent by the source cell core network node.

The sending module 1302 shown in fig. 16 may include a broadcasting unit 1701 and a handover command sending unit 1702, as shown in fig. 17, of an apparatus for synchronizing to a non-host traffic bearer channel according to another embodiment of the present invention, wherein:

the broadcast unit 1701 is used for sending a broadcast message containing a master reference frame number N_E-UTRANParameter N matched with frame number_Counter；

The handover command sending unit 1702 is configured to issue a handover command to the terminal, where the handover command includes an indication that a target format is a non-primary format and a non-primary format reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN。

If the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThese three parameters are not terminal-predefined, and the broadcast message sent by the broadcast unit 1701 as an example in fig. 17 is a broadcast message other than the master-system referral frame number N_E-UTRANParameter N matched with frame number_CounterBesides, it also includes main system radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

If the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeThe three parameters are predefined by the terminal, and the handover command sending unit 1702 is configured to issue a handover command to the terminal, where the handover command includes a non-master reference frame number N_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_Counter。

Fig. 13 illustrates a radio access network node as a target cell radio access network node, where a request message received by the receiving module 1301 includes a handover request message and a handover request response message, and the apparatus for synchronizing to a non-primary service bearer channel illustrated in fig. 13 further includes a handover request sending unit 1801 and a response message forming unit 1802, as shown in fig. 18, the apparatus for synchronizing to a non-primary service bearer channel according to another embodiment of the present invention is provided, where:

the handover request sending unit 1801 is configured to receive a handover request message sent by a core network node of a target cell;

the response message generating unit 1802 is configured to generate a handover request response message according to a handover request message sent by a core network node of a target cell.

At this time, the transmitting module 1302 includes a response message transmitting unit 1803. The response message sending unit 1803 is configured to send a handover request response message to the target cell coreThe core network node of the target cell enables the core network node of the target cell to issue parameters which are contained in the switching request response message and used for determining the moment when the terminal is accessed to the non-master service bearing channel through the core network node of the source cell and the wireless access network node to the terminal, and the switching request response message contains an indication that the target system is the non-master system and a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN. The handover request response message may further include a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

It should be noted that, because the contents of information interaction, execution process, and the like between the modules/units of the apparatus are based on the same concept as the method embodiment of the present invention, the technical effect brought by the contents is the same as the method embodiment of the present invention, and specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.

The method and apparatus for synchronizing to a non-master service bearer channel provided in the embodiments of the present invention are described in detail above, and a specific example is applied in the description to explain the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understand the method and core ideas of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method for synchronizing to a non-master traffic bearer channel, the method comprising:

a terminal acquires a parameter for determining the moment of accessing to a non-master service bearer channel;

the terminal accesses the non-main system service bearing channel according to the moment of accessing the non-main system service bearing channel;

the parameter for determining the moment of accessing the non-master service bearer channel comprises a master reference frame number N_E-UTRANNon-master reference frame number N_CurrentGERANFrame number matching parameter N_CounterNon-master access frame number N_AccessGERANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange；

The terminal determines the moment of accessing the non-master service bearer channel according to the parameter for determining the moment of accessing the non-master service bearer channel, and the determining the moment of accessing the non-master service bearer channel comprises the following steps:

the terminal determines the moment of accessing to the non-main-system service bearing channel

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

Wherein,

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN

T_E-UTRANis the starting time of the wireless frame of the main system.

2. The method of claim 1, wherein the obtaining, by the terminal, the parameter for determining the time for accessing to the non-primary service bearer channel comprises:

the terminal receives an assignment wireless channel command or a switching command sent by network side equipment and a broadcast message; and acquiring a predefined master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange；

The assignment radio channel command or the handover command is carried inThe non-master access frame number N_AccessGERANAnd non-master reference frame number N_CurrentGERAN；

The broadcast message carries the master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

3. The method of claim 1, wherein the obtaining, by the terminal, the parameter for determining the time for accessing to the non-primary service bearer channel comprises: the terminal receives an assignment wireless channel command or a switching command issued by network side equipment, wherein the assignment wireless channel command or the switching command comprises the master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

4. The method of claim 1, wherein the obtaining, by the terminal, the parameter for determining the time for accessing to the non-primary service bearer channel comprises:

the terminal receives an assignment wireless channel command or a switching command issued by network side equipment and acquires a predefined master wireless frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange；

The wireless channel assignment command or the switching command comprises the non-master reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

5. The method of claim 1, wherein the obtaining, by the terminal, the parameter for determining the time for accessing to the non-primary service bearer channel comprises:

the terminal receives a wireless channel assignment command and a broadcast message issued by network side equipment, or the terminal receives a switching command and a broadcast message issued by the network side equipment;

the wireless channel assignment command or the switching command comprises the non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains the master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANFrame number matching parameter N_CounterAnd non-master access frame number value range N_AccessRange。

6. A method for synchronizing to a non-master traffic bearer channel, the method comprising:

the wireless access network node receives the request message or the measurement report;

the wireless access network node sends a parameter for determining the moment when the terminal is accessed to the non-master service bearer channel according to the request message or the measurement report, so that the terminal determines the moment when the terminal is accessed to the non-master service bearer channel according to the parameter for determining the moment when the terminal is accessed to the non-master service bearer channel, and accesses the non-master service bearer channel according to the moment when the terminal is accessed to the non-master service bearer channel;

the parameter for determining the moment when the terminal accesses the non-master service bearer channel comprises a master reference frame number N_E-UTRANNon-master reference frame number N_CurrentGERANFrame number matching parameter N_CounterNon-master access frame number N_AccessGERANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeSo that the terminal determines the moment of accessing to the non-main service bearing channel

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

Wherein,

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN

T_E-UTRANis the starting time of the wireless frame of the main system.

7. The method of claim 6, wherein the request message comprises a bearer establishment request message;

the parameter that the wireless access network node sends and determines the moment when the terminal is accessed to the non-main service bearing channel according to the request or the measurement report comprises the following steps:

the radio access network node sends a wireless channel assignment command to the terminal according to the bearing establishment request message, or the radio access network node sends a switching command to the terminal according to the measurement report, the bearing establishment request message comprises an indication that the terminal supports a multi-system cell, and the wireless channel assignment command or the switching command comprises a main system reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

8. The method of claim 6, wherein the request message comprises a bearer establishment request message;

the parameter that the wireless access network node sends and determines the moment when the terminal is accessed to the non-main type service bearing channel according to the request message or the measurement report comprises:

the wireless connectionThe network access node issues a broadcast message and issues an assignment wireless channel command to the terminal according to the bearing establishment request message, the bearing establishment request message comprises an indication that the terminal supports a multi-mode cell, and the assignment wireless channel command comprises a non-master reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

9. The method of claim 8, wherein the broadcast message further comprises a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

10. The method of claim 6, wherein the request message comprises a bearer establishment request message;

the radio access network node sends a wireless channel assignment command to the terminal according to the bearing establishment request message, or the radio access network node sends a switching command to the terminal according to the measurement report, the bearing establishment request message comprises an indication that the terminal supports a multi-system cell, and the wireless channel assignment command or the switching command comprises a non-master-system reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

11. The method of claim 6, wherein the parameter for the radio access network node to determine the moment when the terminal accesses the non-primary service bearer channel according to the request message or the measurement report transmission comprises:

the wireless access network node determines a target cell for switching according to the measurement report;

the wireless access network node sends a switching command and a broadcast message to the terminal, wherein the switching command comprises an indication that a target system is a non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

12. The method of claim 11, wherein the broadcast message further includes a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

13. The method of claim 6, wherein the radio access network node is a source cell radio access network node, the request message comprising a handover request message and a handover request response message;

the source cell wireless access network node determines that a target cell to be switched is a multi-system cell according to the measurement report and sends a switching request message to a source cell core network node;

the source cell wireless access network node generates a switching command according to a switching request response message sent by the source cell core network node;

the source cell wireless access network node sends a broadcast message and the switching command to the terminal, wherein the switching command comprises an indication that the target mode is a non-master mode and a non-master mode reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

14. The method of claim 13, wherein the broadcast message further comprises a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

15. The method of claim 6, wherein the radio access network node is a target cell radio access network node, the request message comprising a handover request message and a handover request response message;

the target cell wireless access network node generates a switching request response message according to the switching request message sent by the target cell core network node;

the target cell wireless access network node sends the switching request response message to a target cell core network node, so that the target cell core network node sends a parameter which is contained in the switching request response message and used for determining the moment when the terminal is accessed to a non-main service bearing channel to the terminal through a source cell core network node and the wireless access network node;

the switching request response message comprises an indication that the target system is a non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN。

16. The method of claim 15, wherein the handover request response message further includes a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

17. A device for synchronizing to a non-master service bearer channel is characterized in that the device is a terminal device, and the device comprises:

the parameter acquisition module is used for acquiring parameters for determining the moment of accessing to the non-master service bearer channel;

the access module is used for accessing the non-master service bearer channel according to the moment of accessing the non-master service bearer channel calculated by the determination module;

The determining module is used for determining the moment of accessing to the non-main-system service bearing channel

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

The determining module is further configured to determine

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN

T_E-UTRANIs the starting time of the wireless frame of the main system.

18. The apparatus of claim 17, wherein the parameter obtaining module comprises a first receiving unit, configured to receive a command for assigning a radio channel or a handover command sent by a network side device;

the parameter acquisition module also comprises a second receiving unit used for receiving the broadcast message sent by the network side equipment;

the parameter acquisition module further comprises a predefined parameter acquisition unit for acquiring predefined parameters.

19. The apparatus of claim 18, wherein the non-master reference frame number N is carried in the assign radio channel command or handover command_CurrentGERANAnd non-master access frame number N_AccessGERAN；

The broadcast message carries the master reference frame number N_E-UTRANParameter N matched with frame number_Counter；

The predefined parameter comprises a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

20. The apparatus of claim 18 wherein the assignment radio channel command or switch command includes the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

21. The apparatus of claim 18, wherein the non-master reference frame number N is included in the assign radio channel command or switch command_CurrentGERANAnd non-master access frame number N_AccessGERAN；

The broadcast message contains the master reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANFrame number matching parameter N_CounterAnd non-master access frame number value range N_AccessRange。

22. The apparatus of claim 18, wherein the predefined parameter comprises the master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange；

The wireless channel assignment command or the switching command comprises the non-master reference frame number N_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_Counter。

23. An apparatus for synchronizing to a non-primary-mode traffic bearer channel, the apparatus being a radio access network node, the apparatus comprising:

a receiving module, configured to receive a request message or a measurement report;

a sending module, configured to send a parameter that determines a time when the terminal accesses the non-primary-system service bearer channel according to the request message or the measurement report, so that the terminal determines a time when the terminal accesses the non-primary-system service bearer channel according to the parameter that determines the time when the terminal accesses the non-primary-system service bearer channel, and accesses the non-primary-system service bearer channel according to the time when the terminal accesses the non-primary-system service bearer channel;

wherein, the parameter for determining the moment when the terminal accesses the non-master service bearer channel comprises a master reference frame number N_E-UTRANNon-master reference frame number N_CurrentGERANFrame number matching parameter N_CounterNon-master access frame number N_AccessGERANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRangeSo that the terminal can determine to access to the non-master serviceTime of bearer channel

T_AccessGERAN＝T_CurrentGERAN+((N_AccessGERAN-(N_CurrentGERAN％N_AccessRange)

+N_AccessRange)％N_AccessRange)×T_PeriodGERAN

Wherein,

T_CurrentGERAN＝T_E-UTRAN-((1024×N_Counter+N_E-UTRAN)％6)×T_{PeriodE-UTRAN}

+(N_CurrentGERAN％13)×T_PeriodGERAN

T_E-UTRANis the starting time of the wireless frame of the main system.

24. The apparatus of claim 23, wherein the request message comprises a bearer establishment request message;

the sending module comprises a first issuing unit, which is used for issuing an assignment wireless channel command to the terminal according to the bearing establishment request message or issuing a switching command to the terminal according to the measurement report;

the sending module further comprises a broadcasting unit for sending a broadcast message.

25. The apparatus of claim 24, wherein the bearer setup request message comprises an indication that the terminal supports multi-mode cells, and wherein the assign radio channel command or handover command comprises a master mode reference frame number N_E-UTRANRadio frame period T of main system_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANNon-master reference frame number N_CurrentGERANNon-master access frame number value range N_AccessRangeFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

26. The apparatus of claim 24, wherein the request message comprises a bearer establishment request message;

the bearing establishment request message comprises an indication that the terminal supports multi-mode cells, and the wireless channel assignment command or the switching command comprises a non-master mode reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERANThe broadcast message contains a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。

27. The apparatus of claim 26, wherein the broadcast message further comprises a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

28. The apparatus of claim 24, wherein the bearer setup request message comprises an indication that the terminal supports multi-mode cells, and wherein the assign radio channel command or handover command comprises a non-master reference frame number N_CurrentGERANMaster reference frame number N_E-UTRANFrame number matching parameter N_CounterAnd non-master access frame number N_AccessGERAN。

29. The apparatus of claim 23, wherein the radio access network node is a source cell radio access network node, the request message comprising a handover request message and a handover request response message;

the device also comprises a switching request message sending unit, which is used for determining a switched target cell according to the measurement report and sending a switching request message to the core network node of the source cell;

and the switching command generating unit is used for generating a switching command according to the switching request response message sent by the core network node of the source cell.

30. The apparatus of claim 29, wherein the transmitting module comprises a broadcasting unit and a handover command transmitting unit;

the broadcast unit is used for sending broadcast messages, and the broadcast messages contain master mode reference frame numbers N_E-UTRANParameter N matched with frame number_Counter；

The switching command sending unit is used for sending a switching command to the terminal, and the switching command comprises an indication that the target system is a non-master system and a non-master system reference frame number N_CurrentGERANAnd non-master access frame number N_AccessGERAN。

31. The apparatus of claim 30, wherein the broadcast message further comprises a master radio frame period T_{PeriodE-UTRAN}Non-master radio frame period T_PeriodGERANAnd non-master access frame number value range N_AccessRange。

32. The apparatus of claim 23, wherein the sending module comprises a handover command sending unit, and the handover command sending unit is configured to send a handover command, where the handover command includes an indication that the target system is a non-master system, and a non-master system reference frame number N_CurrentGERANNon-master access frame number N_AccessGERANMaster reference frame number N_E-UTRANParameter N matched with frame number_Counter。

33. The apparatus of claim 23, wherein the radio access network node is a target cell radio access network node, the request message comprising a handover request message and a handover request response message;

the device further comprises:

a switching request sending unit, configured to receive a switching request message sent by a core network node of a target cell;

a response message generating unit, configured to generate a handover request response message according to a handover request message sent by a target cell core network node;

the sending module comprises:

a response message sending unit, configured to send the handover request response message to a target cell core network node, so that the target cell core network node issues, to a terminal, a parameter that determines a time when the terminal included in the handover request response message is accessed to a non-primary service bearer channel through a source cell core network node and a wireless access network node;

34. The apparatus of claim 33, wherein the handover request response message further comprises a master reference frame number N_E-UTRANParameter N matched with frame number_Counter。