CN101212741B - Dual-mode terminal switching method, system, and the dual-mode terminal - Google Patents
Dual-mode terminal switching method, system, and the dual-mode terminal Download PDFInfo
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- CN101212741B CN101212741B CN2006101698745A CN200610169874A CN101212741B CN 101212741 B CN101212741 B CN 101212741B CN 2006101698745 A CN2006101698745 A CN 2006101698745A CN 200610169874 A CN200610169874 A CN 200610169874A CN 101212741 B CN101212741 B CN 101212741B
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Abstract
The invention discloses a method for realizing switching of a double module terminal, which is used in a first network, a second network and a double module terminal system. The method comprises the following steps: A. the first network broadcasts position deviation parameters between the second network and an upstream pilot channel time slot to the double module terminal; B. after the double module terminal connected to the first network receives the position deviation parameters, the double module terminal counts and obtains time slot position information of the upstream pilot channel sent by the second network according to the position deviation parameters and is attached to the second network according to the time slot position information, thus realizing the switching among networks. The method of the invention guarantees that the double module terminal can be upstream connected correctly and realizes the normal switching among the double module terminal systems to provide relatively good experience to users. A system and the double module terminal which realizes the switching of the double module terminal are disclosed either.
Description
Technical field
The present invention relates to the data transmission technology of the communications field, relate in particular to a kind of method, system and dual-mode terminal of realizing that dual-mode terminal switches.
Background technology
The construction of 3-G (Generation Three mobile communication system) (3G) at present also must rely on existing the 2/2.5th third-generation mobile communication system (2/2.5G) to solve the problem of the network coverage and roaming, and therefore existing 3G terminal adopts global system for mobile communications (GSM)/General Packet Radio Service System (GPRS) and the bimodulus multifrequency of 3G to design more.In this way, the user can obtain the high-speed data service of 3G and the service of speech business in the overlay area of 3G network, the zone that does not temporarily also have to cover at 3G network utilizes existing 2/2.5G network that service is provided, and realizes in dual-mode terminal that therefore the correct switching between the adjacent different system is very important.
Existing TD SDMA (TD-SCDMA) network using TDD mode; between different base stations, keep synchronous transmission; but increase along with transmission range; the downlink business time slot (TS0) of telepoint base station and downlink pilot frequency channel time slot (DwPTS) can produce propagation delay when arriving target BS; accumulation along with signal; ascending pilot channel time slot (UpPTS) even uplink service time slot to target BS produce interference; influence the operate as normal of system; as shown in Figure 1; wherein TS0 and TS1 are the generic downlink business time-slot, and GP is the translation and protection time slot.
Consider that the above-mentioned echo reflection and the DwPTS of telepoint base station in the networking of TD-SCDMA postpones interference to the up access of target BS, the TD-SCDMA network may adopt ascending pilot channel conversion (UpPCH shifting) method, and promptly ascending pilot channel (UpPCH) can send at the time slot position outside the UpPTS of acquiescence.As shown in Figure 2, each wireless sub-frame is by seven common time slots (TS0～TS6) constitute with three special time slots.Wherein, common time slot is used for transmitting data, and three special time slots are respectively DwPTS, UpPTS and translation and protection time slot (GP).UpPCH can also go up transmission at uplink service time slot (as: TS1, TS2 etc.) except sending on the UpPTS, and among Fig. 2, UpPCH sends at the end of business time-slot TS1.
In the existing TD-SCDMA network, added the signaling of supporting UpPCH shifting in physical layer.Can utilize following formula (1) if in physical layer, will obtain to send the time slot position information of UpPCH:
T
TX-UpPCH＝T
RX-DwPCH-2Δt
p+12*16T
C+n
UpPCHShift*16T
C ......(1)
Wherein:
T
TX-UpPCHIt is the transmitting time of UpPCH; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel (DwPCH); Δ t
pThe express time deviation; T
CThe time span of representing a chip (chip); n
UpPCHShiftThe position deviation parameter of expression and UpPTS, this value step-length is 16chips, and the value size is an integer value in (0,127), and this integer value is by the upper-layer protocol assignment, and this upper-layer protocol assignation information is as shown in table 1.
| UpPCH positional information (UpPCH position info) | OP | Integer (0,127) | In the time division duplex of 1.28M,, UpPCH just need not get parms n if taking the UpPTS of acquiescence UpPCHShift, otherwise utilize this calculation of parameter UpPCH positional information.In?the?1.28M?TDD，if UpPCH?occupies?UpPTS， the?parameter?is?not?need. Or?the?parameter?is caculated?for?the?uplink access?position?of?a?cell. |
Table 1
Just can be when terminal is known the positional information of UpPCH according to formula (1) by system message or hand off signaling after according to this positional information at the assigned address access slot, thus the success that inserts guaranteed, and described positional information can be time slot position information.But for above-mentioned dual-mode terminal, when system's use UpPCH shifting method and when dual-mode terminal is operated in the GSM/GPRS network schemer, this dual-mode terminal can't be known the accurate time slot position information that UpPCH sends in the TD-SCDMA system in advance, can only send uplink pilot signal at the UpPTS time slot of acquiescence, if the detection window of target BS is not in this position at this moment, then can't detect the access of this ascending pilot frequency and next step business time-slot, make access failure, thereby cause handoff failure between terminal system, influence performance and user experience that dual-mode terminal switches from 2G to 3G.
Summary of the invention
The invention provides a kind of method, system and dual-mode terminal of realizing that dual-mode terminal switches, in order to solve the accurate time slot position information that to know UpPCH when the dual-mode terminal that exists in the prior art is operated in first network system in advance, make and insert second network failure, thereby cause the problem of handoff failure between terminal system.
The invention provides a kind of method that realizes that dual-mode terminal switches, be applied to comprise in the system of second network of first network, TDD mode and dual-mode terminal, this method may further comprise the steps:
A0, described second network send in described second network position deviation parameter with the ascending pilot channel time slot to described first network, or described first network obtains described position deviation parameter from described second network;
A. described first network is broadcasted in described second network position deviation parameter with the ascending pilot channel time slot to described dual-mode terminal;
B. after the dual-mode terminal that has inserted first network receives described position deviation parameter, according to this position deviation calculation of parameter and obtain in described second network to send the time slot position information of ascending pilot channel, and insert this second network according to described time slot position information, realize switching between network.
First network described in the steps A is broadcasted described position deviation parameter by system message to described dual-mode terminal.
The information of time slot position described in the step B is according to formula T
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate acquisition,
Wherein, T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot.
The present invention also provides a kind of system that realizes that dual-mode terminal switches, and this system comprises second network and the dual-mode terminal of first network, TDD mode, wherein,
Described first network, be used for linking to each other with described dual-mode terminal, and broadcast in described second network position deviation parameter with the ascending pilot channel time slot to described dual-mode terminal, the acquiring unit in first network is used for obtaining described position deviation parameter from described second network;
Described dual-mode terminal, be used to insert described first network, and receive described position deviation parameter, according to this position deviation calculation of parameter and obtain in described second network to send the time slot position information of ascending pilot channel, and insert this second network according to described time slot position information, realize switching between network;
Described second network is used for being connected with described dual-mode terminal, and the transmitting element in described second network is used for sending described position deviation parameter to described first network.
Described first network also comprises:
First linkage unit is used for linking to each other with described dual-mode terminal;
Radio unit is used for broadcasting described position deviation parameter to described dual-mode terminal.
Described dual-mode terminal comprises:
Receiving element, be used to insert described first network after, receive described position deviation parameter;
Operating unit is used for according to the described position deviation calculation of parameter that receives and obtains described time slot position information, and inserts described second network according to described time slot position information, realizes switching between network.
Described second network also comprises:
Second linkage unit is used for linking to each other with described dual-mode terminal.
Described operating unit comprises:
Computing unit is used for according to the described position deviation parameter and the formula T that receive
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate and obtain described time slot position information,
Wherein, T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot;
Switch unit is used for inserting this second network according to the time slot position information of described acquisition, realizes switching between network.
Described radio unit also is further used for broadcasting described position deviation parameter by system message to described dual-mode terminal.
The present invention also provides a kind of dual-mode terminal, is applied to comprise in the system of second network of first network and TDD mode, it is characterized in that this dual-mode terminal comprises:
Receiving element, after being used to insert described first network, receive in described second network of this first Web broadcast position deviation parameter with the ascending pilot channel time slot, described position deviation parameter is that described second network sends to described first network, or described first network obtains from described second network;
Operating unit is used for according to the described position deviation calculation of parameter that receives and obtains described time slot position information, and inserts described second network according to described time slot position information, realizes switching between network.
Described operating unit comprises:
Computing unit is used for according to the described position deviation parameter and the formula T that receive
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate and obtain described time slot position information,
Wherein, T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot;
Switch unit is used for inserting this second network according to the time slot position information of described acquisition, realizes switching between network.
The present invention receives in second network of this first Web broadcast the position deviation parameter with the ascending pilot channel time slot by the dual-mode terminal that inserts first network, and according to this position deviation calculation of parameter and obtain in described second network to send the time slot position information of ascending pilot channel, and insert this second network according to described time slot position information, the method of switching between the realization network, guaranteed that dual-mode terminal can carry out up access exactly, realize the normal switching between the dual-mode terminal system, make better user experience.
Description of drawings
Fig. 1 is a self-interference principle schematic in the TD-SCDMA system described in the background technology;
Fig. 2 is an ascending pilot channel conversion method schematic diagram in the TD-SCDMA system described in the background technology;
Fig. 3 realizes the method step schematic diagram that dual-mode terminal switches described in the embodiment of the invention;
Fig. 4 (a) and Fig. 4 (b) realize the system configuration schematic diagram that dual-mode terminal switches described in the embodiment of the invention.
Embodiment
The present invention's design is, first network is broadcasted in described second network position deviation parameter with the ascending pilot channel time slot to described dual-mode terminal, after the dual-mode terminal that has inserted first network receives the position deviation parameter, according to this position deviation calculation of parameter and obtain in second network to send the time slot position information of ascending pilot channel, and insert this second network according to described time slot position information, realize switching between network, guarantee that this dual-mode terminal can insert second network at correct time slot position, thereby guarantee the correct switching between system in the dual-mode terminal.In the present invention, the network that setting GSM or GPRS etc. belong to 2G/2.5G is first network, contain above-mentioned position deviation parameter in the 3G networks such as TD-SCDMA network, and be second network according to the network that the time slot position information of ascending pilot channel can be calculated and be obtained to send to this position deviation parameter.The present invention is described in further detail below in conjunction with Figure of description.In the methods of the invention,
As shown in Figure 3, be the method step schematic flow sheet of the embodiment of the invention, in the present embodiment, setting first network is the GSM network, and second network is the TD-SCDMA network, and dual-mode terminal has inserted this first network, and this method mainly may further comprise the steps:
Step 301:GSM network in dual-mode terminal broadcasting TD-SCDMA network with the position deviation parameter of ascending pilot channel time slot.
In the present embodiment, this step can be implemented in the following manner, in GSM and the common zone that covers of TD-SCDMA, the GSM network can be to this dual-mode terminal broadcasting gsm system message, comprise in this message: Broadcast Control Channel (BCCH) sequence number is distributed Indication message, 3G sequence number Indication message, the time division duplex bandwidth information, the absolute radio channel of time division duplex number and ascending pilot channel conversion (UpPCHshifting) information etc., wherein, UpPCH shifting information is to issue by add new indication bit method in gsm system message, be used in reference to the transmission positional information that is shown in UpPCH in the TD-SCDMA system, the bit number that takies in UpPCH shifting information is 7, in the middle of comprised formula T
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CAnd with the position deviation parameter of ascending pilot channel time slot, i.e. n
UpPCHShiftValue, this value is an integer in 0 to 127.This gsm system message is broadcast to dual-mode terminal after being encoded by the network based predefined coded system of GSM.
In the prior art, the GSM network does not comprise the n in the above-mentioned UpPCH shifting information in the gsm system of dual-mode terminal broadcasting
UpPCHShiftValue.And in the present invention, this n
UpPCHShiftValue can be to add new indication bit method by high level in gsm system message to issue, and promptly the TD-SCDMA network sends to the GSM network, also can obtain from described TD-SCDMA network by described GSM network.
Step 302: after the dual-mode terminal that has inserted this GSM network receives described position deviation parameter, according to this position deviation calculation of parameter and obtain in the TD-SCDMA network to send the time slot position information of ascending pilot channel, and insert this TD-SCDMA network according to described time slot position information, realize switching between network.
After when this dual-mode terminal is operated in the GSM pattern, receiving the gsm system message of GSM Web broadcast, this system message is decoded according to predefined mode, obtain the information that comprises in this gsm system message, and according to indicated n in the UpPCH shifting information that obtains
UpPCHShiftValue and formula (1) are T
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate the accurate transmission position of ascending pilot channel in the TD-SCDMA network, wherein, T
TX-UpPCHIt is the transmitting time of UpPCH; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel (DwPCH); Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftThe position deviation parameter of expression and UpPTS, this value step-length is 16chips, and the value size is an integer value in (0,127), and this integer value is by the upper-layer protocol assignment, and this upper-layer protocol assignation information is as shown in table 1.
This dual-mode terminal can insert the TD-SCDMA network at correct time slot position subsequently, thereby has realized the correct switching between system in the dual-mode terminal.
Pass through the inventive method, the feasible dual-mode terminal that is operated in first network can be known the time slot position information of the transmission uplink pilot signal in second network in advance, guarantee that this dual-mode terminal can insert second network at correct time slot position, realize correctly switching in the dual-mode terminal.
Method based on above-mentioned realization dual-mode terminal switching, the invention allows for a kind of system that realizes that dual-mode terminal switches, shown in Fig. 4 (a) and Fig. 4 (b), this system comprises first network, second network and dual-mode terminal, wherein, the position deviation parameter of second network and ascending pilot channel time slot is broadcasted in first network back that is used for linking to each other with dual-mode terminal to this dual-mode terminal; Dual-mode terminal is used to insert first network, and receive described position deviation parameter, according to this position deviation calculation of parameter and obtain in second network to send the time slot position information of ascending pilot channel, and insert this second network, realize switching between network according to described time slot position information; Second network is used for being connected with described dual-mode terminal.
Described first network comprises first linkage unit 11 and radio unit 12, and wherein, first linkage unit 11 is used for linking to each other with described dual-mode terminal; Radio unit 12 is used for broadcasting described position deviation parameter to described dual-mode terminal.Described radio unit 12 also is further used for broadcasting described position deviation parameter by system message to described dual-mode terminal.
Described dual-mode terminal comprises receiving element 21 and operating unit 22, wherein, after receiving element 21 is used to insert described first network, receives described position deviation parameter; Operating unit 22 is used for according to the described position deviation calculation of parameter that receives and obtains described time slot position information, and inserts described second network according to described time slot position information, realizes switching between network.
Described operating unit comprises computing unit 31 and switch unit 32, and wherein, computing unit 31 is used for according to the described position deviation parameter and the formula T that receive
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculating also obtains described time slot position information, wherein, and T
TX-UpPCH is a calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot; Switch unit 32 is used for inserting this second network according to the time slot position information of described acquisition, realizes switching between network.
Described second network comprises second linkage unit 41, is used for linking to each other with described dual-mode terminal.
Shown in Fig. 4 (a), first network in the system of the present invention also comprises acquiring unit 13, is used for obtaining described position deviation parameter from described second network.Shown in Fig. 4 (b),, be used for sending described position deviation parameter to described first network for second network in the system of the present invention also comprises transmitting element 42.
Based on aforementioned the inventive method and system, the present invention also provides a kind of dual-mode terminal, be applied to comprise in the system of first network and second network, its structure is shown in the part of the dual-mode terminal among Fig. 4 (a) and Fig. 4 (b), this dual-mode terminal comprises receiving element and operating unit equally, wherein, after receiving element is used to insert described first network, receive in described second network of this first Web broadcast position deviation parameter with the ascending pilot channel time slot; Operating unit is used for according to the described position deviation calculation of parameter that receives and obtains described time slot position information, and inserts described second network according to described time slot position information, realizes switching between network.
Described operating unit also comprises computing unit and switch unit, and wherein, computing unit is used for according to the described position deviation parameter and the formula T that receive
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculating also obtains described time slot position information, wherein, and T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot; Switch unit is used for inserting this second network according to the time slot position information of described acquisition, realizes switching between network.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. method that realizes that dual-mode terminal switches is applied to comprise in the system of second network of first network, TDD mode and dual-mode terminal, it is characterized in that this method may further comprise the steps:
A0, described second network send in described second network position deviation parameter with the ascending pilot channel time slot to described first network, or described first network obtains described position deviation parameter from described second network;
A. described first network is broadcasted in described second network position deviation parameter with the ascending pilot channel time slot to described dual-mode terminal;
B. after the dual-mode terminal that has inserted first network receives described position deviation parameter, according to this position deviation calculation of parameter and obtain in described second network to send the time slot position information of ascending pilot channel, and insert this second network according to described time slot position information, realize switching between network.
2. the method for claim 1 is characterized in that, first network described in the steps A is broadcasted described position deviation parameter by system message to described dual-mode terminal.
3. the method for claim 1 is characterized in that, the information of time slot position described in the step B is according to formula T
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate acquisition,
Wherein, T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot.
4. a system that realizes that dual-mode terminal switches is characterized in that this system comprises second network and the dual-mode terminal of first network, TDD mode, wherein,
Described first network, be used for linking to each other with described dual-mode terminal, and broadcast in described second network position deviation parameter with the ascending pilot channel time slot to described dual-mode terminal, the acquiring unit in first network is used for obtaining described position deviation parameter from described second network;
Described dual-mode terminal, be used to insert described first network, and receive described position deviation parameter, according to this position deviation calculation of parameter and obtain in described second network to send the time slot position information of ascending pilot channel, and insert this second network according to described time slot position information, realize switching between network;
Described second network is used for being connected with described dual-mode terminal, and the transmitting element in described second network is used for sending described position deviation parameter to described first network.
5. system as claimed in claim 4 is characterized in that, described first network also comprises:
First linkage unit is used for linking to each other with described dual-mode terminal;
Radio unit is used for broadcasting described position deviation parameter to described dual-mode terminal.
6. system as claimed in claim 4 is characterized in that, described dual-mode terminal comprises:
Receiving element, be used to insert described first network after, receive described position deviation parameter;
Operating unit is used for according to the described position deviation calculation of parameter that receives and obtains described time slot position information, and inserts described second network according to described time slot position information, realizes switching between network.
7. system as claimed in claim 4 is characterized in that, described second network also comprises:
Second linkage unit is used for linking to each other with described dual-mode terminal.
8. system as claimed in claim 6 is characterized in that, described operating unit comprises:
Computing unit is used for according to the described position deviation parameter and the formula T that receive
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate and obtain described time slot position information,
Wherein, T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot;
Switch unit is used for inserting this second network according to the time slot position information of described acquisition, realizes switching between network.
9. system as claimed in claim 5 is characterized in that, described radio unit also is further used for broadcasting described position deviation parameter by system message to described dual-mode terminal.
10. dual-mode terminal is applied to comprise in the system of second network of first network and TDD mode, it is characterized in that this dual-mode terminal comprises:
Receiving element, after being used to insert described first network, receive in described second network of this first Web broadcast position deviation parameter with the ascending pilot channel time slot, described position deviation parameter is that second network sends to described first network, or first network obtains from described second network;
Operating unit is used for according to the described position deviation calculation of parameter that receives and obtains described time slot position information, and inserts described second network according to described time slot position information, realizes switching between network.
11., it is characterized in that described operating unit comprises as dual-mode terminal as described in the claim 10:
Computing unit is used for according to the described position deviation parameter and the formula T that receive
TX-UpPCH=T
RX-DwPCH-2 Δ t
p+ 12*16T
C+ n
UpPCHShift* 16T
CCalculate and obtain described time slot position information,
Wherein, T
TX-UpPCHBe calculated value, the transmitting time of expression ascending pilot channel; T
RX-DwPCHIt is the time of reception of downlink pilot frequency channel; Δ t
pThe express time deviation; T
CThe time span of a chip of expression; n
UpPCHShiftRepresent described and the position deviation parameter ascending pilot channel time slot;
Switch unit is used for inserting this second network according to the time slot position information of described acquisition, realizes switching between network.
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|---|---|---|---|
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|---|---|---|---|
| CN2006101698745A CN101212741B (en) | 2006-12-29 | 2006-12-29 | Dual-mode terminal switching method, system, and the dual-mode terminal |
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| CN102014394B (en) * | 2009-09-08 | 2014-04-09 | 中兴通讯股份有限公司 | Method and device for dynamically configuring uplink pilot channel |
| CN101753202A (en) * | 2010-01-07 | 2010-06-23 | 中兴通讯股份有限公司 | Up synchronous method and terminal. |
| CN108174423B (en) * | 2016-12-07 | 2021-08-06 | 中国移动通信有限公司研究院 | Circuit resource reservation method and node |
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