CN100571427C

CN100571427C - The network selecting method of TD-SCDMA and GSM dual-mode handset

Info

Publication number: CN100571427C
Application number: CNB2006101504877A
Authority: CN
Inventors: 杨起; 丁克忠; 马爱芬
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2006-11-02
Filing date: 2006-11-02
Publication date: 2009-12-16
Anticipated expiration: 2026-11-02
Also published as: CN101068402A

Abstract

The invention discloses the network selecting method of a kind of TD-SCDMA and GSM dual-mode handset, step is as follows: when needs are selected net, search the 900MHz frequency range network or the 1800MHz frequency range network that satisfy communicating requirement; When the 900MHz frequency range network of communicating requirement is satisfied in existence, with the job network of this 900MHz frequency range network as dual-mode handset; When selecting the 1800MHz network as the work network segment, start timer, when described timer was operated in the 1800MHz network as GSM, timing search satisfied the 900MHz network of communicating requirement.The situation that technical solution of the present invention has avoided DCS1800 and TD-SCDMA to work simultaneously, thus interfering with each other between the heterogeneous networks signal reduced effectively, improved the result of use of TD-SCDMA and GSM dual-mode and dual-idle mobile phone.

Description

The network selecting method of TD-SCDMA and GSM dual-mode handset

Technical field

The present invention relates to a kind of wireless communication terminal technology, specifically, relate to the network selecting method of a kind of TD-SCDMA and GSM dual-mode handset.

Background technology

Along with TD-SCDMA (TD-SCDMA, Time Division-Synchronous CodeDivision Multiple Access) moves towards commercial gradually, the TD-SCDMA network is had in the face of the comprehensive inadequately problem of the network coverage at first stage of construction, if can not resolve this realistic problem, to greatly influence TD-SCDMA user's development, and then have influence on the development of TD-SCDMA in the China and even the world.And address this problem, at present best solution is nothing more than mending net by other network for the TD-SCDMA network, the GSM network just in time satisfies above condition, and needs corresponding TD-SCDMA and GSM dual-mode and dual-idle mobile phone to satisfy the demand of TD-SCDMA and GSM network on terminal.

The working frequency range of TD-SCDMA network is 2010～2015MHz.And GSM is a Dual Band network, and promptly GSM mobile handset has taken 900MHZ and two frequency ranges of 1800MHZ, and they all are GSM standard.Two network system function are identical, mainly are the frequency differences, and GSM900 is operated in 900MHZ, and DCS1800 is operated in 1800MHZ.That use the earliest is GSM900, along with developing rapidly of communication network scale and number of users, original GSM900 network growing tension that becomes, for satisfying the demand that the user increases better, introduced DCS1800, and to adopt with the GSM900 network be support, the networking mode of DCS1800 network for replenishing, constitute the GSM900/DCS1800 dual-frequency network, to relax the situation that is becoming tight high traffic compact district wireless channel day.Like this, the user just can freely be switched between the two at GSM900/DCS1800, selects preferable channel to converse automatically, has improved user's call completing rate greatly, and this handoff procedure can not have influence on user's normal talking.

Because the working frequency range of GSM network has comprised 1800MHz, though therefore TD-SCDMA and GSM dual-mode handset have above-mentioned advantage, but because the frequency range of TD-SCDMA working frequency range and DCS1800 is very approaching, so can produce interference physically, when gsm module is in DCS1800, cause this TD-SCDMA and GSM dual-mode handset result of use not good.

Summary of the invention

Technical problem solved by the invention provides the network selecting method of a kind of TD-SCDMA and GSM dual-mode handset, has reduced interfering with each other between the heterogeneous networks signal effectively.

Technical scheme is as follows:

The network selecting method of TD-SCDMA and GSM dual-mode handset may further comprise the steps:

(1) when needs are selected net, searches the 900MHz frequency range network or the 1800MHz frequency range network that satisfy communicating requirement;

(2) when the 900MHz frequency range network of communicating requirement is satisfied in existence, with the job network of this 900MHz frequency range network as dual-mode handset; Otherwise, continue to search 1800MHz frequency range network;

(3) when existence meets the 1800MHz frequency range network of communicating requirement, then select the job network of 1800MHz frequency range network as dual-mode handset; When not existing, then return step (1).

Further, in the step (1), when start or mode switch, gsm module starts and begins to search satisfactory GSM network.

Further, in the step (2),, judge then whether it satisfies communicating requirement, then finish to look for net, gsm module to be operated in the 900MHz network if satisfy communicating requirement if there is the 900MHz network.

Further, in the step (2), when gsm module does not find the 900MHz network, perhaps the 900MHz network signal can't proper communication, then abandons using the 900MHz network, begins to search the 1800MHz network.

Further, in the step (3), when selecting the 1800MHz network as the work network segment, start timer, when described timer was operated in the 1800MHz network as GSM, timing search satisfied the 900MHz network of communicating requirement.

Further, step (3) is specially:

(31) when selecting the 1800MHz network, start timer as the work network segment;

(32) judge whether gsm module and network have information interaction; When gsm module and network have information interaction, execution in step (31), otherwise execution in step (33);

(33) when not having information interaction between gsm module and the network, preserve the 1800MHz network information, stop the connection of gsm module between 1800MHz network and base station, search the 900MHz network;

(34) when finding the 900MHz network, and the 900MHz network that finds is when satisfying the communication needs, timeing closing device then, and gsm module switches to the 900MHz network work.

Further, step (31) is specially:

When selecting the 1800MHz network as the work network segment, start timer, when described timer was operated in the 1800MHz network as GSM, timing search satisfied the 900MHz network of communicating requirement.

Further, the 1800MHz network information comprises described in the step (33):

The position area information at the carrier frequency of the 1800MHz network information and gsm module place.

Further, step (34) further comprises:

When not finding the 900MHz network, when the 900MHz network that perhaps finds can not satisfy the communication needs, then finish Network Search, and return to being connected of 1800MHz network with position area information according to the 1800MHz network carrier frequency of preserving, start timer simultaneously, execution in step (31).

Further, control the frequency of searching of searching 900MHz frequency range network by the timing length of setting described timer.

The present invention is by being provided with the gsm module of TD-SCDMA and GSM dual-mode handset, make this module use 900MHz frequency range network work as much as possible, promptly the preferential 900MHz network of selecting under the situation that 900MHz and 1800MHz network all exist is only just selected the 1800MHz network when can not find the 900MHz network.Like this, the situation of having avoided DCS1800 and TD-SCDMA to work simultaneously most possibly, thus reduced interfering with each other between the heterogeneous networks signal effectively, improved the result of use of TD-SCDMA and GSM dual-mode and dual-idle mobile phone.

Description of drawings

Fig. 1 is a groundwork flow chart of the present invention;

Fig. 2 is the flow chart that gsm module of the present invention is selected net when being operated in the 1800MHz network segment.

Embodiment

With reference to the accompanying drawings the preferred embodiments of the present invention are described in detail.

TD-SCDMA and GSM dual-mode handset comprise TD-SCDMA module and gsm module simultaneously.

With reference to shown in Figure 1, the network selecting method of TD-SCDMA and GSM dual-mode handset specifically may further comprise the steps:

1, when needs are selected net, searches the 900MHz frequency range network or the 1800MHz frequency range network that satisfy communicating requirement.

Step S101: when start or mode switch, gsm module starts, and begins to look for net, searches satisfactory GSM network.

Step S102: search 900MHz frequency range network.

2, when the 900MHz frequency range network of communicating requirement is satisfied in existence, with the job network of this 900MHz frequency range network as dual-mode handset; Otherwise, continue to search 1800MHz frequency range network.

Step S103: judge whether to find the 900MHz frequency range network that satisfies communicating requirement.

When finding the 900MHz frequency range network that satisfies communicating requirement, execution in step S104, otherwise, execution in step S105.

Step S104: if there is the 900MHz network, judge then whether it satisfies communicating requirement, then finish to look for net, gsm module to be operated in the 900MHz network if satisfy communicating requirement.

3, when existence meets the 1800MHz frequency range network of communicating requirement, then select the job network of 1800MHz frequency range network as dual-mode handset.

When gsm module does not find the 900MHz network, perhaps the 900MHz network signal can't proper communication, then abandon using the 900MHz network, though perhaps found the 900MHz network, but owing to network signal is more weak etc. reason causes can't proper communication, then abandon using the 900MHz network, begin to search the 1800MHz network.

Step S105: search the 1800MHz network.

Step S106: judge whether to find the 1800MHz network that meets communicating requirement.

If find the 1800MHz network that meets communicating requirement, execution in step S107; If do not find the 1800MHz network that meets communicating requirement, execution in step S101 looks for net again.

Step S107: when selecting the 1800MHz network, then select the job network of 1800MHz frequency range network, and start timer as dual-mode handset as the work network segment.

With reference to shown in Figure 2, when selecting the 1800MHz network, start timer as the work network segment, when GSM was operated in the 1800MHz network, the timer timing search satisfied the 900MHz network of communicating requirement.

Step S201: when selecting the 1800MHz network as the work network segment, timer starts, and gsm module selects the 1800MHz network as the work network segment.

Step S202: timer work.

The timing length of timer can rule of thumb be set (as 10 minutes), also can set arbitrarily as required.By setting the timing length of timer, can control the frequency of searching of searching 900MHz frequency range network.

Step S203: judge whether gsm module and network have information interaction.

Whether timer is judged to have between this moment gsm module and the network and is called out and by information interaction behaviors such as calling, conversation, data transmit-receive, transmitting-receiving short message or network registries behind setting-up time.

If gsm module and network have information interaction, execution in step S202 does not initiate to look for net, and restarts timer; If gsm module and network do not have information interaction, execution in step S204.

Step S204: preserve network settings, disconnect and being connected of 1800MHz network.

When not having information interaction between gsm module and the network, preserve the 1800MHz network information, stop the connection of gsm module between 1800MHz network and base station, begin to search the 900MHz network.

The 1800MHz network information comprises the carrier frequency of the 1800MHz network information and the position area information at gsm module place.

Step S205: search the 900MHz network.

Step S206: judge whether to find and search the 900MHz network.

When finding the 900MHz network, execution in step S207; Otherwise, execution in step S208.

Step S207:GSM module switches to the 900MHz network work.

When finding the 900MHz network, and the 900MHz network that finds is when satisfying the communication needs, timeing closing device then, and gsm module switches to the 900MHz network work.

Step S208: according to the setting of preserving, return to the connection of 1800MHz network, restart timer, execution in step S201.

When not finding the 900MHz network, when the 900MHz network that perhaps finds can not satisfy the communication needs, then finish Network Search, and return to being connected of 1800MHz network with position area information according to the 1800MHz network carrier frequency of preserving, start timer simultaneously, search for the 900MHz network again.

Claims

1, the network selecting method of a kind of TD-SCDMA and GSM dual-mode handset may further comprise the steps:

(1) when needs were selected net, the gsm module of described mobile phone was searched 900MHz frequency range network or the 1800MHz frequency range network that satisfies communicating requirement;

(3) when not having the 1800MHz frequency range network that meets communicating requirement, return step (1); When existence meets the 1800MHz frequency range network of communicating requirement, then select the job network of 1800MHz frequency range network as dual-mode handset, wherein:

(31) when selecting 1800MHz frequency range network, start timer as job network;

(32) judge whether gsm module and 1800MHz frequency range network have information interaction; When gsm module and 1800MHz frequency range network have information interaction, execution in step (31), otherwise execution in step (33);

(33) when not having information interaction between gsm module and the 1800MHz frequency range network, preserve the 1800MHz frequency range network information, stop gsm module in 1800MHz frequency range network and the connection between the base station, search 900MHz frequency range network;

(34) when finding 900MHz frequency range network, and the 900MHz frequency range network that finds is when satisfying the communication needs, timeing closing device then, and gsm module switches to 900MHz frequency range network work.

2, the network selecting method of TD-SCDMA according to claim 1 and GSM dual-mode handset is characterized in that, in the step (1), when start or mode switch, gsm module starts and begin to search satisfactory GSM network.

3, the network selecting method of TD-SCDMA according to claim 1 and GSM dual-mode handset is characterized in that, in the step (2), if there is 900MHz frequency range network, judge then whether it satisfies communicating requirement, then finish to look for net, gsm module to be operated in 900MHz frequency range network if satisfy communicating requirement.

4, the network selecting method of TD-SCDMA according to claim 1 and GSM dual-mode handset, it is characterized in that, in the step (2), when gsm module does not find 900MHz frequency range network, perhaps 900MHz frequency range network signal can't proper communication, then abandon using 900MHz frequency range network, begin to search 1800MHz frequency range network.

5, the network selecting method of TD-SCDMA according to claim 1 and GSM dual-mode handset is characterized in that, step (31) is specially:

When selecting 1800MHz frequency range network as job network, start timer, when described timer was operated in 1800MHz frequency range network when gsm module, timing search satisfied the 900MHz frequency range network of communicating requirement.

6, the network selecting method of TD-SCDMA according to claim 1 and GSM dual-mode handset is characterized in that, the 1800MHz frequency range network information comprises described in the step (33):

The carrier frequency of 1800MHz frequency range network and the position area information at gsm module place.

7, the network selecting method of TD-SCDMA according to claim 6 and GSM dual-mode handset is characterized in that, step (34) further comprises:

When not finding 900MHz frequency range network, when the 900MHz frequency range network that perhaps finds can not satisfy the communication needs, then finish Network Search, and return to being connected of 1800MHz frequency range network according to the 1800MHz frequency range network carrier frequency of preserving and the position area information at gsm module place, start timer simultaneously and come execution in step (31).

8, according to the network selecting method of each described TD-SCDMA of claim 1 to 7 and GSM dual-mode handset, it is characterized in that, control the frequency of searching of searching 900MHz frequency range network by the timing length of setting described timer.