CN102123430A - Web searching method and terminal - Google Patents
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- CN102123430A CN102123430A CN2011100721143A CN201110072114A CN102123430A CN 102123430 A CN102123430 A CN 102123430A CN 2011100721143 A CN2011100721143 A CN 2011100721143A CN 201110072114 A CN201110072114 A CN 201110072114A CN 102123430 A CN102123430 A CN 102123430A
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Abstract
The invention discloses a web searching method and terminal, belonging to the field of a global system for mobile communications (GSM). The web searching method comprises the following steps of: measuring each frequency point to obtain frequency point energy; performing cell synchronization on corresponding cells of the frequency points in a sequence from large frequency point energy to small frequency point energy; after performing cell synchronization on each cell, judging whether the time difference between a first time point and a second time point is greater than or equal to the cell synchronization required time, wherein the first time point is the synchronization finish time of the latest cell on which cell synchronization is performed, and the second time point is the soonest time when the system message scheduling cycle of all the cells in a synchronized state arrives; if the time difference between the first time point and the second time point is greater than or equal to the cell synchronization required time, performing cell synchronization on the cell corresponding to the next frequently point; and if the time difference between the first time point and the second time point is less than the cell synchronization required time, waiting till the second time point and reading the system message when the second time point arrives. According to the web searching method disclosed by the invention, the synchronization tasks of other frequency points are performed in advance during the idle time after the synchronization is finished before the system message is read, thus increasing the web searching speed.
Description
Technical field
The present invention relates to GSM (Global System for Mobile Communications, the global system for mobile communications) communications field, particularly a kind of method for searching network and terminal.
Background technology
In radio communication, wireless terminal needs first search network (net searched in abbreviation), finds access network after the suitable network, just can enjoy the service that operator provides.The access speed of wireless terminal has directly influenced user's stand-by period.
The existing network process of searching is: at first each frequency is carried out RSSI (Received Signal Strength Indication, the indication of received signal intensity) and measure, obtain the frequency energy; According to frequency energy order from big to small, each frequency respective cell is carried out searched network process successively then.The network process of searching of each frequency respective cell comprises two steps, and step 1 is that the sub-district is synchronous, and step 2 is a reading cell system message.Referring to the net scheduling graph of searching shown in Figure 1, select a frequency behind the rssi measurement, it is synchronous that this frequency respective cell 1 is carried out the sub-district, after one period free time, reads sub-district 1 system message, and judge by system message whether this sub-district is proper cell, if proper cell is then searched network process and is finished, if not proper cell, again next frequency respective cell is carried out and searched network process, until finding proper cell.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:
Each frequency all has one period free time from being accomplished to read system message synchronously in searching network process, about 300 milliseconds of this free time, cause that to search net spee slower this free time.
Summary of the invention
In order to accelerate to search net spee, the embodiment of the invention provides a kind of method for searching network and terminal.Described technical scheme is as follows:
A kind of method for searching network, described method comprises:
Each frequency is measured, obtained the frequency energy;
According to frequency energy order from big to small, synchronous to frequency respective cell execution sub-district;
Whenever the sub-district that executes a sub-district is synchronous, judge first constantly and second time period between constantly whether more than or equal to sub-district required time synchronously, described first is a nearest synchronous finish time that executes synchronous sub-district, sub-district constantly, described second moment that constantly arrives the earliest dispatching cycle for the system message of the sub-district of all synchronous regimes, the sub-district of described synchronous regime be meant execute the sub-district synchronously and system message also not have the sub-district of arrival dispatching cycle;
If more than or equal to the synchronous required time of sub-district, synchronous to next frequency respective cell execution sub-district, if less than the synchronous required time of sub-district, wait for up to described second moment, read the system message of described second moment arrival.
A kind of terminal, described terminal comprises:
Measurement module is used for each frequency is measured, and obtains the frequency energy;
Synchronization module is used for according to frequency energy order from big to small, and is synchronous to frequency respective cell execution sub-district;
Judge module, the sub-district that is used for whenever executing a sub-district is synchronous, judge first constantly and second time period between constantly whether more than or equal to sub-district required time synchronously, described first is a nearest synchronous finish time that executes synchronous sub-district, sub-district constantly, described second moment that constantly arrives the earliest dispatching cycle for the system message of the sub-district of all synchronous regimes, the sub-district of described synchronous regime be meant execute the sub-district synchronously and system message also not have the sub-district of arrival dispatching cycle;
Processing module, synchronous if be used for to next frequency respective cell execution sub-district more than or equal to the synchronous required time of sub-district, if less than the synchronous required time of sub-district, wait for up to described second moment, read the system message of described second moment arrival.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:
By utilize finish synchronously after to the free time between the read system message, make the synchronous task of other frequencies in advance, can accelerate to search net spee.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 be prior art provide search the net scheduling graph;
Fig. 2 is the method for searching network flow chart that one embodiment of the invention provides;
Fig. 3 is the method for searching network flow chart that another embodiment of the present invention provides;
Fig. 4 be the embodiment of the invention provide search the net scheduling graph;
Fig. 5 is the terminal structure schematic diagram that another embodiment of the present invention provides;
Fig. 6 is the terminal structure schematic diagram that another embodiment of the present invention provides.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Referring to Fig. 2, an example of the present invention provides a kind of method for searching network, comprising:
101: each frequency is measured, obtained the frequency energy;
102:, synchronous to frequency respective cell execution sub-district according to frequency energy order from big to small;
103: the sub-district that whenever executes a sub-district is synchronous, judge first constantly and second time period between constantly whether more than or equal to sub-district required time synchronously, first is a nearest synchronous finish time that executes synchronous sub-district, sub-district constantly, second moment that constantly arrives the earliest dispatching cycle for the system message of the sub-district of all synchronous regimes, the sub-district of synchronous regime be meant execute the sub-district synchronously and system message also not have the sub-district of arrival dispatching cycle;
104: synchronous if more than or equal to the synchronous required time of sub-district to next frequency respective cell execution sub-district, if, wait for, read the system message of second moment arrival up to second moment less than the synchronous required time of sub-district.
Referring to Fig. 3, read after second system message that arrives constantly, comprising:
105:, judge whether the second system message corresponding district that arrives constantly is proper cell according to second system message that arrives constantly that reads;
106: if proper cell, then insert this sub-district, this is searched network process and finishes, if not proper cell, it is synchronous to judge whether all frequency respective cell have all executed the sub-district, if it is synchronous all to have executed the sub-district, this is searched network process and finishes, illustrating that terminal is searched at this does not find proper cell in network process, can initiate once to search network process again after a period of time, execute synchronous sub-district, sub-district if having or not, judge the 3rd constantly and the 4th time period between constantly whether more than or equal to sub-district required time synchronously, the 3rd constantly is the moment of system message end dispatching cycle of second moment arrival, and the 4th constantly is the moment of the second afterwards next constantly system message arrival, if more than or equal to the synchronous required time of sub-district, synchronous to next frequency respective cell execution sub-district, if less than the synchronous required time of sub-district, wait for, read the 4th system message that arrives constantly up to the 4th moment.
Further, the sub-district that whenever executes a sub-district synchronously after, comprising: the update of district status that will execute synchronous sub-district, sub-district is a synchronous regime.
Further, read after second system message that arrives constantly, perhaps read after the 4th system message that arrives constantly, comprising: with the update of district status of second moment or the 4th system message respective cell that arrives constantly is the read system message state.
To the free time between the read system message, make the synchronous task of other frequencies in advance after present embodiment is finished synchronously by utilization, can accelerate to search net spee.
Be example with the GSM network below, the above-mentioned network process of searching is described.Present embodiment is established candidate's frequency 4, comprises frequency 1, frequency 2, frequency 3 and frequency 4, respectively respective cell 1, sub-district 2, sub-district 3, sub-district 4.In conjunction with the net scheduling graph of searching shown in Figure 4, method for searching network comprises:
201: the physical layer of terminal is behind candidate's frequency that the Access Layer of receiving terminal issues, obtain a Cell searching (Cell Search) table, and the cell status State of each sub-district is initialized as NOT_SYNC, and frame number deviation FnOffset is initialized as FN_INVALID.It is as shown in table 1 that plain table status initialization is searched in the sub-district.
Table 1 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| State | NOT_SYNC | NOT_SYNC | NOT_SYNC | NOT_SYNC |
| FnOffset | FN_INVALID | FN_INVALID | FN_INVALID | FN_INVALID |
Each territory is defined as follows in the Cell searching table:
Frequency: be subdistrict frequency point information;
State: the recording cell state is divided into not synchronous regime (NOT_SYNC), synchronous regime (SYNC) and read system message state (BCCH);
FnOffset: the frame number deviation of recording cell, be used for the position of calculation plot system message (as SI3 or SI4), after finishing synchronously, the sub-district obtains.FN_INVALID represents not read system message.
202: the physical layer of terminal measures the frequency energy to each frequency, synchronous according to frequency energy order (being followed successively by sub-district 1, sub-district 2, sub-district 3 and sub-district 4) from big to small to frequency respective cell execution sub-district, at first selection mode is the sub-district (sub-district 1) of NOT_SYNC, do the synchronous task of sub-district 1, after finishing the synchronous task of sub-district 1, the cell status of sub-district 1 is revised as SYNC, and the frame number deviation of recording cell 1 is FnOffset1.It is as shown in table 2 that plain table status change is searched in the sub-district.
Table 2 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| State | SYNC | NOT_SYNC | NOT_SYNC | NOT_SYNC |
| FnOffset | FnOffset?1 | FN_INVALID | FN_INVALID | FN_INVALID |
203: the physical layer of terminal judges that whether time period between the moment that a nearest system message that executes the synchronous finish time of synchronous sub-district, sub-district (current for sub-district 1) and the sub-district of all synchronous regimes (current be sub-district 1) arrives dispatching cycle the earliest is more than or equal to the synchronous required time of sub-district, if more than or equal to, referring to Fig. 4, then selection mode is the sub-district 2 of NOT_SYNC, do the synchronous task of sub-district 2, after finishing the synchronous task of sub-district 2, the cell status of sub-district 2 is revised as SYNC, and the frame number deviation of recording cell 2 is FnOffset2.It is as shown in table 3 that plain table status change is searched in the sub-district.
Table 3 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| State | SYNC | ?SYNC | NOT_SYNC | NOT_SYNC |
| FnOffset | FnOffset?1 | ?FnOffset2 | FN_INVALID | FN_INVALID |
204: the physical layer of terminal judges that whether time period between the moment that a nearest system message that executes the synchronous finish time of synchronous sub-district, sub-district (current for sub-district 2) and the sub-district of all synchronous regimes (current be sub-district 1 and sub-district 2) arrives dispatching cycle the earliest is more than or equal to the synchronous required time of sub-district, if more than or equal to, referring to Fig. 4, then selection mode is the sub-district 3 of NOT_SYNC, do the synchronous task of sub-district 3, after finishing the synchronous task of sub-district 3, the cell status of sub-district 3 is revised as SYNC, and the frame number deviation of recording cell 3 is FnOffset3.It is as shown in table 4 that plain table status change is searched in the sub-district.
Table 4 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| State | SYNC | ?SYNC | ?SYNC | NOT_SYNC |
| FnOffset | FnOffset?1 | ?FnOffset2 | ?FnOffset3 | FN_INVALID |
205: the physical layer of terminal judges that whether time period between the moment that a nearest system message that executes the synchronous finish time of synchronous sub-district, sub-district (current for sub-district 3) and the sub-district of all synchronous regimes (current be sub-district 1, sub-district 2 and sub-district 3) arrives dispatching cycle the earliest is more than or equal to the synchronous required time of sub-district, if less than, referring to Fig. 4, arrive the dispatching cycle of the system message of sub-district 2, then do the read system message task of sub-district 2, after finishing the read system message task of sub-district 2, the cell status of revising sub-district 2 is BCCH.It is as shown in table 5 that plain table status change is searched in the sub-district.
Table 5 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| ?State | SYNC | BCCH | SYNC | NOT_SYNC |
| ?FnOffset | FnOffset?1 | FnOffset2 | FnOffset3 | FN_INVALID |
206: read after the system message of sub-district 2, the physical layer of terminal judges whether sub-district 2 is proper cell, if sub-district 2 is proper cell, then insert this sub-district, this is searched network process and finishes, if sub-district 2 is not a proper cell, it is synchronous to judge whether all frequency respective cell have all executed the sub-district, if it is synchronous all to have executed the sub-district, this is searched network process and finishes, illustrating that terminal is searched at this does not find proper cell in network process, can initiate once to search network process again after a period of time, execute synchronous sub-district, sub-district if having or not, whether the time period between the moment of system message (current is the system message of sub-district 2) end dispatching cycle that judgement arrives the earliest and the moment that next system message arrives is more than or equal to the synchronous required time of sub-district, if more than or equal to, referring to Fig. 4, then selection mode is the sub-district (sub-district 4) of NOT_SYNC, do the synchronous task of sub-district 4, behind the synchronous task of finishing sub-district 4, the cell status of revising sub-district 4 is SYNC, and the frame number deviation of recording cell 4 is FnOffset4.It is as shown in table 6 that plain table status change is searched in the sub-district.
Table 6 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| State | SYNC | BCCH | SYNC | SYNC |
| FnOffset | FnOffset?1 | FnOffset2 | FnOffset3 | FnOffset4 |
207: the physical layer of terminal judges that whether time period between the moment that a nearest system message that executes the synchronous finish time of synchronous sub-district, sub-district (current for sub-district 4) and the sub-district of all synchronous regimes (current be sub-district 1, sub-district 3 and sub-district 4) arrives dispatching cycle the earliest is more than or equal to the synchronous required time of sub-district, if less than, referring to Fig. 4, the system message of sub-district 1 arrives dispatching cycle, then do sub-district 1 system message and read task, after finishing the read system message task of sub-district 1, the cell status of revising sub-district 1 is BCCH.It is as shown in table 7 that plain table status change is searched in the sub-district.
Table 7 Cell searching table
| ?Frequency | Sub-district 1 | Sub-district 2 | Sub-district 3 | Sub-district 4 |
| State | BCCH | BCCH | SYNC | NOT_SYNC |
| FnOffset | FnOffset?1 | FnOffset2 | FnOffset3 | FN_INVALID |
Read after the system message of sub-district 1, sub-district 1 is handled according to the method for step 206.
208: press such scheme and carry out, till finding suitable frequency.
Comparison diagram 1 and Fig. 4 are as can be seen, prior art shown in Figure 1 one search net only can finish in dispatching cycle a sub-district synchronously and system message read, the embodiment of the invention shown in Figure 4 can be finished reading with the system messages of 2 sub-districts synchronously of 4 sub-districts at the same net of searching in dispatching cycle.Therefore, present embodiment can accelerate to search net spee with respect to prior art.
After searching the net spee quickening, for some little operators, frequency is less, the edge zone in the sub-district, and dtr signal, this programme can be accelerated the resident speed of wireless terminal, reduce period of reservation of number; Terminal is residing network fast, initiates business faster, has promoted the resident performance of network and the network access performance of terminal.
Referring to Fig. 5, another embodiment of the present invention provides a kind of terminal, comprising:
Measurement module 301 is used for each frequency is measured, and obtains the frequency energy;
Synchronization module 302 is used for according to frequency energy order from big to small, and is synchronous to frequency respective cell execution sub-district;
Judge module 303, the sub-district that is used for whenever executing a sub-district is synchronous, judge first constantly and second time period between constantly whether more than or equal to sub-district required time synchronously, first is a nearest synchronous finish time that executes synchronous sub-district, sub-district constantly, second moment that constantly arrives the earliest dispatching cycle for the system message of the sub-district of all synchronous regimes, the sub-district of synchronous regime be meant execute the sub-district synchronously and system message also not have the sub-district of arrival dispatching cycle;
Processing module 304, synchronous if be used for to next frequency respective cell execution sub-district more than or equal to the synchronous required time of sub-district, if, wait for, read the system message of second moment arrival up to second moment less than the synchronous required time of sub-district.
Referring to Fig. 6, processing module reads after second system message that arrives constantly, and terminal also comprises:
Second judge module 305 is used for judging according to second system message that arrives constantly that reads whether the second system message corresponding district that arrives constantly is proper cell;
Second processing module 306, be used for if proper cell, then insert this sub-district, this is searched network process and finishes, if not proper cell, it is synchronous to judge whether all frequency respective cell have all executed the sub-district, if it is synchronous all to have executed the sub-district, this is searched network process and finishes, execute synchronous sub-district, sub-district if having or not, judge the 3rd constantly and the 4th time period between constantly whether more than or equal to sub-district required time synchronously, the 3rd constantly is the moment of second system message end dispatching cycle that arrives constantly, the 4th constantly is the moment that the second afterwards next constantly system message arrives, if more than or equal to the synchronous required time of sub-district, synchronous to next frequency respective cell execution sub-district, if less than the synchronous required time of sub-district, wait is read the 4th system message that arrives constantly up to the 4th moment.
Terminal also comprises: first update module 307, the sub-district that is used for whenever executing a sub-district synchronously after, be synchronous regime with the update of district status that executes synchronous sub-district, sub-district.
Terminal also comprises: second update module 308, be used to read after second system message that arrives constantly, perhaps read after the 4th system message that constantly arrives, with second constantly or the update of district status of the 4th system message respective cell that arrives constantly be the read system message state.
To the free time between the read system message, make the synchronous task of other frequencies in advance after present embodiment is finished synchronously by utilization, can accelerate to search net spee.
After searching the net spee quickening, for some little operators, frequency is less, the edge zone in the sub-district, and dtr signal, this programme can be accelerated the resident speed of wireless terminal, reduce period of reservation of number; Terminal is residing network fast, initiates business faster, has promoted the resident performance of network and the network access performance of terminal.
All or part of content in the technical scheme that above embodiment provides can realize that its software program is stored in the storage medium that can read by software programming, storage medium for example: the hard disk in the computer, CD or floppy disk.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a method for searching network is characterized in that, described method comprises:
Each frequency is measured, obtained the frequency energy;
According to frequency energy order from big to small, synchronous to frequency respective cell execution sub-district;
Whenever the sub-district that executes a sub-district is synchronous, judge first constantly and second time period between constantly whether more than or equal to sub-district required time synchronously, described first is a nearest synchronous finish time that executes synchronous sub-district, sub-district constantly, described second moment that constantly arrives the earliest dispatching cycle for the system message of the sub-district of all synchronous regimes, the sub-district of described synchronous regime be meant execute the sub-district synchronously and system message also not have the sub-district of arrival dispatching cycle;
If more than or equal to the synchronous required time of sub-district, synchronous to next frequency respective cell execution sub-district, if less than the synchronous required time of sub-district, wait for up to described second moment, read the system message of described second moment arrival.
2. method according to claim 1 is characterized in that, described reading after described second system message that arrives constantly comprises:
According to described second system message that arrives constantly that reads, judge whether the described second system message corresponding district that arrives constantly is proper cell;
If proper cell then inserts this sub-district, this searches the network process end,
If not proper cell, it is synchronous to judge whether all frequency respective cell have all executed the sub-district, if it is synchronous all to have executed the sub-district, this is searched network process and finishes, execute synchronous sub-district, sub-district if having or not, judge the 3rd constantly and the 4th time period between constantly whether more than or equal to sub-district required time synchronously, the described the 3rd constantly is the moment of described second system message end dispatching cycle that arrives constantly, the described the 4th constantly is the moment that the described second afterwards next constantly system message arrives, if more than or equal to the synchronous required time of sub-district, synchronous to next frequency respective cell execution sub-district, if less than the synchronous required time of sub-district, wait is read the described the 4th system message that arrives constantly up to described the 4th moment.
3. method according to claim 1 and 2 is characterized in that, the sub-district that whenever executes a sub-district synchronously after, comprising:
With the described update of district status that executes synchronous sub-district, sub-district is synchronous regime.
4. method according to claim 1 and 2 is characterized in that, reads after described second system message that arrives constantly, perhaps reads after the described the 4th system message that arrives constantly, comprising:
With the update of district status of described second moment or the described the 4th system message respective cell that arrives constantly is the read system message state.
5. a terminal is characterized in that, described terminal comprises:
Measurement module is used for each frequency is measured, and obtains the frequency energy;
Synchronization module is used for according to frequency energy order from big to small, and is synchronous to frequency respective cell execution sub-district;
Judge module, the sub-district that is used for whenever executing a sub-district is synchronous, judge first constantly and second time period between constantly whether more than or equal to sub-district required time synchronously, described first is a nearest synchronous finish time that executes synchronous sub-district, sub-district constantly, described second moment that constantly arrives the earliest dispatching cycle for the system message of the sub-district of all synchronous regimes, the sub-district of described synchronous regime be meant execute the sub-district synchronously and system message also not have the sub-district of arrival dispatching cycle;
Processing module, synchronous if be used for to next frequency respective cell execution sub-district more than or equal to the synchronous required time of sub-district, if less than the synchronous required time of sub-district, wait for up to described second moment, read the system message of described second moment arrival.
6. terminal according to claim 5 is characterized in that, described processing module reads after described second system message that arrives constantly, and described terminal also comprises:
Second judge module is used for judging according to described second system message that arrives constantly that reads whether the described second system message corresponding district that arrives constantly is proper cell;
Second processing module, be used for if proper cell, then insert this sub-district, this is searched network process and finishes, if not proper cell, it is synchronous to judge whether all frequency respective cell have all executed the sub-district, if it is synchronous all to have executed the sub-district, this is searched network process and finishes, execute synchronous sub-district, sub-district if having or not, judge the 3rd constantly and the 4th time period between constantly whether more than or equal to sub-district required time synchronously, the described the 3rd constantly is the moment of described second system message end dispatching cycle that arrives constantly, the described the 4th constantly is the moment that the described second afterwards next constantly system message arrives, if more than or equal to the synchronous required time of sub-district, synchronous to next frequency respective cell execution sub-district, if less than the synchronous required time of sub-district, wait is read the described the 4th system message that arrives constantly up to described the 4th moment.
7. according to claim 5 or 6 described terminals, it is characterized in that described terminal also comprises:
Update module, the sub-district that is used for whenever executing a sub-district synchronously after, be synchronous regime with the described update of district status that executes synchronous sub-district, sub-district.
8. according to claim 5 or 6 described terminals, it is characterized in that described terminal also comprises:
Second update module, be used to read after described second system message that arrives constantly, perhaps read after the described the 4th system message that constantly arrives, with described second constantly or the update of district status of the described the 4th system message respective cell that arrives constantly be the read system message state.
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Application publication date: 20110713 |