CN102264121B - Multi-mode terminal network reselection method, multi-mode terminal equipment and communication system - Google Patents
Multi-mode terminal network reselection method, multi-mode terminal equipment and communication system Download PDFInfo
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- CN102264121B CN102264121B CN201010188695.2A CN201010188695A CN102264121B CN 102264121 B CN102264121 B CN 102264121B CN 201010188695 A CN201010188695 A CN 201010188695A CN 102264121 B CN102264121 B CN 102264121B
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Abstract
The invention discloses a multi-mode terminal network reselection method, multi-mode terminal equipment and a communication system. The method comprises the following steps: when a multi-mode terminal processes a service in a first network, measuring RSSI (Received Signal Strength Indication) values corresponding to each main carrier frequency point of a second network; according to a measuring result, selecting a main carrier frequency point whose RSSI value exceeds a main carrier frequency point of a first reselection threshold; when the multi-mode terminal receives a channel release message sent by the first network after end of the service in the first network, determining whether exists at least one RSCP (Received Signal Code Power) value exceeding a second reselection threshold among selected RSCP values corresponding to the main carrier frequency point respectively; when determining that at least one RSCP value exceeding the second reselection threshold exists, reselecting and entering the second network. By employing a technical scheme of the invention, problems that system resource consumption is large in a process of network reselection by a multi-mode terminal, interference among cells is enhanced, system capacity is reduced and the like in the prior art are solved.
Description
Technical field
The present invention relates to mobile communication technology field, relate in particular to a kind of network reselection method, multi-mode terminal equipment and communication system of multimode terminal.
Background technology
In global range, commercial digital mobile communication system largest, that coverage is the widest is global system for mobile communications (GSM, Global System for Mobile Communication) at present.Gsm system is commonly referred to as Generation Mobile Telecommunication System (2G, The 2nd Generation Mobile Communication) system.Development along with mobile communication technology, adopt code division multiple access access (CDMA, Code DivisionMultiple Access) 3G (Third Generation) Moblie of technology (3G, The 3rd Generation MobileCommunication) system also maybe will enter commercial stage.3G system is mainstream technology with wideband CDMA (WCDMA, Wideband CDMA) standard, time-division synchronization CDMA (TD-SCDMA, TimeDivision-Synchronous CDMA) standard and CDMA 2000 standards.
At present, 3G network (for example WCDMA network, TD-SCDMA network, CDMA2000 network) and GSM network exists simultaneously and increasingly merge, makes dual-mode terminal occur in a large number and be widely applied.So-called " bimodulus " just refers to that terminal equipment can be operated under two network schemers, for example, TD-SCDMA/GSM dual-mode terminal can be operated in TD-SCDMA network and GSM network, and WCDMA/GSM dual-mode terminal can be operated in WCDMA network and GSM network, etc.
The TD-SCDMA/GSM dual-mode terminal (hereinafter to be referred as TD terminal) of take describes as example.In prior art, stipulated following principle: the preferential resident TD-SCDMA network of TD terminal, the preferential bearing data service of TD-SCDMA network, the preferential carry voice traffic of GSM network.According to the preferential resident TD-SCDMA network principle of TD terminal, TD terminal is initiated speech business in TD-SCDMA network.According to the preferential carry voice traffic principle of GSM network, current speech business is switched to GSM network from TD-SCDMA network.When current speech service ending, TD terminal resides in GSM network, wireless access network (the RAT of TD terminal now, Radio Access Network) type changes, by universal mobile telecommunications system terrestrial access network (UTRAN, Universal Mobile Telecommunication SystemTerritorial Radio Access Network) become GSM/ enhanced data rates for gsm evolution system Radio Access Network (GERAN, GSM/EDGE Radio Access Network; EDGE:Enhanced Datarates for GSM Evolution).TD terminal is in the situation that RAT type changes, Location Area Code (LAC no matter, Location Area Code) whether change and all need to carry out location area updating (LAU, Location Area Update) and Routing Area Update (RAU, Routing Area Update), so TD terminal will be carried out LAU and RAU in GSM network, general 5-10 consuming time second.According to the preferential resident TD-SCDMA network principle of TD terminal, TD terminal enters TD-SCDMA network by gravity treatment, the RAT type of TD terminal will change again, from GERAN, become UTRAN, in like manner TD terminal will be carried out LAU and RAU in TD-SCDMA network, general 5-10 consuming time second, concrete sequential schematic diagram refers to Fig. 1.
According to existing TD terminal, finish the scheme that gravity treatment enters TD-SCDMA network after current speech business, a large amount of TD terminals is after each conclusion sound business, all need to carry out 10-20 LAU and the RAU of second, make system resources consumption larger, cause presence of intercell interference to strengthen simultaneously, power system capacity reduces, thereby has had a strong impact on service quality.Similarly, existing WCDMA/GSM dual-mode terminal finishes gravity treatment after current speech business and enters the scheme of WCDMA network and CDMA 2000/GSM dual-mode terminal and finish the scheme that gravity treatment after current speech business enters CDMA2000 network and have equally the problems referred to above.
Summary of the invention
The embodiment of the present invention provides a kind of network reselection method and multi-mode terminal equipment of multimode terminal, larger in order to solve the system resources consumption that in prior art, multimode terminal exists in network reselection process, and the problem such as presence of intercell interference enhancing, power system capacity reduction.
The embodiment of the present invention also provides a kind of communication system.
Embodiment of the present invention technical scheme is as follows:
A network reselection method for multimode terminal, the method comprising the steps of: when multimode terminal is processed business in first network, measure the received signal strength indicator RSSI value corresponding to each main carrier frequency point difference of second network; And according to measurement result, select the main carrier frequency point that RSSI value surpasses the first gravity treatment threshold value; When described multimode terminal receives the channel release message that first network issues after described service ending, determine whether the main carrier frequency point selected respectively in corresponding received signal code power RSCP value, exists at least one RSCP value over the second gravity treatment threshold value; Described multimode terminal is when determining at least one RSCP value of existence over the second gravity treatment threshold value, and gravity treatment enters described second network.
A multi-mode terminal equipment, comprising: measuring unit, for described multi-mode terminal equipment, when first network is processed business, measure the received signal strength indicator RSSI value corresponding to each main carrier frequency point difference of second network; Selected cell, for each main carrier frequency point at second network, according to the measurement result of measuring unit, selects the main carrier frequency point that the RSSI value of measuring surpasses the first gravity treatment threshold value; Receiving element, the channel release message issuing after described service ending for receiving first network; Determining unit, for when receiving element receives described channel release message, determines whether main carrier frequency point that selected cell selects respectively in corresponding received signal code power RSCP value, exists at least one RSCP value over the second gravity treatment threshold value; Gravity treatment unit, for the definite result in determining unit, when being, gravity treatment enters described second network.
A kind of communication system, comprise system message transmitting apparatus and at least one multimode terminal, wherein: system message transmitting apparatus, before residing in described communication system at described multimode terminal, entering other communication systems, each main carrier frequency point, the first gravity treatment threshold value and the second gravity treatment threshold value of described communication system are handed down to described multimode terminal by system message, multimode terminal, for when described other communication systems are processed business, the received signal strength indicator RSSI value corresponding to each main carrier frequency point difference of carrying in the described system message that measurement receives, and according to measurement result, select the main carrier frequency point that RSSI value surpasses the first gravity treatment threshold value of carrying in described system message, and while receiving the channel release message that described other communication systems issue after described service ending, definite main carrier frequency point of selecting is distinguished in corresponding received signal code power RSCP value, whether exist at least one RSCP value to surpass the second gravity treatment threshold value of carrying in described system message, when determining at least one RSCP value of existence over described the second gravity treatment threshold value, gravity treatment enters described communication system.
In embodiment of the present invention technical scheme, when multimode terminal is processed business in first network, measure the RSSI value corresponding to each main carrier frequency point difference of second network, and select RSSI value over the main carrier frequency point of the first gravity treatment threshold value, when receiving the channel release message that first network issues after above-mentioned service ending, determine whether to exist at least one RSCP value to surpass the second gravity treatment threshold value, in definite result when being, this multimode terminal gravity treatment enters second network, therefore, multimode terminal finishes after current business in first network, without carrying out RAU and LAU, it is re eligible access second network, can effectively reduce system resources consumption, reduce presence of intercell interference, capacity, thereby improve service quality.
Accompanying drawing explanation
Fig. 1 is in prior art, and the gravity treatment of TD terminal enters the sequential schematic diagram of TD-SCDMA network;
Fig. 2 is in the embodiment of the present invention, the network reselection method schematic flow sheet of multimode terminal;
Fig. 3 is in prior art, the sequential schematic diagram of the Fast Return function of R6 version 3 GPP agreement regulation;
Fig. 4 is in the embodiment of the present invention, the network reselection method specific implementation schematic flow sheet of multimode terminal;
Fig. 5 is in the embodiment of the present invention, multi-mode terminal equipment structural representation;
Fig. 6 is in the embodiment of the present invention, communication system architecture schematic diagram.
Embodiment
Below in conjunction with each accompanying drawing, embodiment of the present invention technical scheme main realized to principle, embodiment and the beneficial effect that should be able to reach is at length set forth.
Multimode terminal in the embodiment of the present invention can be, but not limited to as dual-mode terminal, for example, can also be three mould terminals.
For multimode terminal, in prior art, stipulated its preferential resident network schemer, the embodiment of the present invention is called preferential residing network by mobile communications network corresponding to this network schemer; For multimode terminal, in prior art, also stipulated the network schemer of preferential its speech business of carrying, the embodiment of the present invention is called the preferential bearer network of speech business by mobile communications network corresponding to this network schemer; For multimode terminal, in prior art, also stipulated the network schemer of preferential its data service of carrying, in the embodiment of the present invention, mobile communications network corresponding to this network schemer is called to the preferential bearer network of data service.Generally, preferential residing network and the preferential bearer network of data service are consolidated networks, and preferential residing network and the preferential bearer network of speech business are heterogeneous networks.For example, for TD-SCDMA/GSM multimode terminal, the preferential bearer network of speech business is GSM network, and preferential residing network is that the preferential bearer network of data service is TD-SCDMA network; For WCDMA/GSM multimode terminal, the preferential bearer network of speech business is GSM network, and preferential residing network is that the preferential bearer network of data service is WCDMA network; For CDMA 2000/GSM multimode terminal, the preferential bearer network of speech business is GSM network, and preferential residing network is that the preferential bearer network of data service is CDMA 2000 networks.Certainly, also can stipulate that the preferential bearer network of preferential residing network and speech business is consolidated network, now preferential residing network and the preferential bearer network of data service are heterogeneous networks.If it is not identical that the preferential residing network of multimode terminal and business (speech business or data service) are preferentially carried network, multimode terminal is after finishing this business, all can adopt the scheme providing in prior art to carry out network reselection, cause system resources consumption larger, and cause presence of intercell interference enhancing, power system capacity to reduce.
The embodiment of the present invention provides a kind of network reselection method of multimode terminal, and as shown in Figure 2, its concrete processing procedure is as follows:
Step 21, when multimode terminal is processed business in first network, measures received signal strength indicator (RSSI, the Received Signal Strength Indication) value corresponding to each main carrier frequency point difference of second network;
If the business that wherein multimode terminal is processed is speech business, first network is the preferential bearer network of speech business, second network is the preferential bearer network of data service, also be preferential residing network, if the business that multimode terminal is processed is data service, second network is the preferential bearer network of data service, and second network is the preferential bearer network of speech business, and second network is preferential residing network.
Multimode terminal can be, but not limited to adopt following two kinds of modes to obtain each main carrier frequency point of second network:
First kind of way, all main carrier frequency points, the first gravity treatment threshold value and the second gravity treatment threshold value of storage second network are set in advance in multimode terminal, follow-up multimode terminal is when carrying out network reselection, can directly according to the above-mentioned information of storage, carry out gravity treatment, when the main carrier frequency point of second network changes, need to upgrade canned data in multimode terminal;
The second way, before multimode terminal enters first network, while residing in second network, second network can be notified all main carrier frequency points, the first gravity treatment threshold value and the second gravity treatment threshold value of second network to multimode terminal by system message, second network can insert above-mentioned information in the redundant bit position of existing system message, also can send special-purpose system message and send above-mentioned information, when the main carrier frequency point of second network changes, main carrier frequency point in system message also can respective change, and this has just realized the renewal of information.
In the embodiment of the present invention, in the process of multimode terminal processing business (data service or speech business) in first network, measure the RSSI value of each main carrier frequency point of second network, if second network has 9 main carrier frequency points, second network measures 9 RSSI values, can be, but not limited to as shown in table 1.
Table 1:
| Main carrier frequency point 1 | RSSI1 value |
| Main |
RSSI2 value |
| Main carrier frequency point 3 | RSSI3 value |
| Main carrier frequency point 4 | RSSI4 value |
| Main carrier frequency point 5 | RSSI5 value |
| Main carrier frequency point 6 | RSSI6 value |
| Main carrier frequency point 7 | RSSI7 value |
| Main carrier frequency point 8 | RSSI8 value |
| Main carrier frequency point 9 | RSSI9 value |
The RSSI value representation of each main carrier frequency point in this main carrier frequency point, drop on the summation of the signal power in bin width, the power that comprises the power of useful signal, the power of interference signal and background noise, if the RSSI value of main carrier frequency point surpasses the first gravity treatment threshold value, to drop on the summation of the signal power in bin width larger for proof, but can not prove that the power of useful signal is larger.
Each RSSI value in table 1 and the first gravity treatment threshold value are compared, and the RSSI value that relatively obtains 5 main carrier frequency points has surpassed the first gravity treatment threshold value, is respectively main carrier frequency point 1,3,4,5,7, obtains table 2.
Table 2:
| Main carrier frequency point 1 |
| Main carrier frequency point 3 |
| Main carrier frequency point 4 |
| Main carrier frequency point 5 |
| Main carrier frequency point 7 |
First network is handled at multimode terminal after the business (speech business or data service) of the preferential carrying of first network, can send Channel Release message to this multimode terminal.
R6 version 3 GPP agreement is made following regulation: TD terminal is after GSM network conclusion sound business, GSM network judgement terminal capability, if TD-SCDMA/GSM multimode terminal carries the cell reselection of whole transmission channels and Separate Dedicated Control Channel and indicates (cell selection indicator afterrelease of all TCH and SDCCH in the Channel Release message sending to this TD terminal; TCH:Traffic Channel; SDCCH:Stand-Alone Dedicated Control Channel) information, this Indication message comprises optimum TD-SCDMA information of adjacent cells, information such as frequency, code word, synchronization timing, indication TD terminal does not reside in GSM network, and directly gravity treatment accesses TD-SCDMA network, TD terminal is according to the Channel Release message gravity treatment access TD-SCDMA network receiving, concrete sequential schematic diagram refers to Fig. 3, and wherein R6 version 3 GPP agreement is referred to as fast return (Fast Return) function.
But existing GSM network is seldom held in and in Channel Release message, carries cell selectionindicator after release of all TCH and SDCCH information, secondly, existing GSM network not back-up system message comprises the frequency point information list of different system, if and carry cell selection indicator after release of all TCH and SDCCH information in Channel Release message, just need to comprise an optimum TD-SCDMA information of adjacent cells, need GSM network by system message, to issue the frequency point information list of different system, that is to say, in order to realize the FastReturn function of R6 version 3 GPP agreement regulation, existing GSM network side and end side are all needed to carry out upgrading to support relevant signaling process, upgrading for GSM network air interface involves a wide range of knowledge, compatibility has a big risk, cost is high, cycle is long, be difficult for realizing.
If by existing GSM network side and end side are all carried out to upgrading, make to carry cell selection indicator after release of all TCH and SDCCH information in ChannelRelease message, multimode terminal can directly enter second network according to the second network adjacent cell list gravity treatment in the cell selection indicator after release of allTCH and SDCCH information receiving.
If step 22 is not selected RSSI to the main carrier frequency point that surpasses the first gravity treatment threshold value, multimode terminal is when receiving the Channel Release message that first network issues after above-mentioned service ending, can be according to the mode of prior art, multimode terminal carries out LAU and RAU in first network, reside in first network, and after LAU and RAU complete, gravity treatment enters second network, carries out LAU and RAU in second network.
If in step 22, select at least one RSSI value surpass the main carrier frequency point of the first gravity treatment threshold value, multimode terminal when receiving the Channel Release message that first network issues after above-mentioned service ending, determine whether to exist at least one main carrier frequency of selecting to put corresponding RSCP value and surpass the second gravity treatment threshold value, wherein determine whether to exist at least one main carrier frequency of selecting to put corresponding RSCP value and can be, but not limited to as following two kinds of performances over the process of the second gravity treatment threshold value:
The first performance, first measure RSCP value corresponding to each main carrier frequency point difference of selecting, each RSCP value of measuring and the second gravity treatment threshold value are compared, according to comparative result, determine whether to exist at least one RSCP value of measuring to surpass the second gravity treatment threshold value, for example, the RSCP value of each main carrier frequency point in difference meter 2, obtain the corresponding relation of the main carrier frequency point shown in table 3 and RSCP value, then each RSCP value respectively with the second gravity treatment threshold value is compared, finally determine 3 RSCP values and surpassed the second gravity treatment threshold value, be respectively main carrier frequency point 1, the RSCP value of main carrier frequency point 4 and main carrier frequency point 7, as shown in table 4.
Table 3:
| Main carrier frequency point 1 | RSCP1 value |
| Main carrier frequency point 3 | RSCP3 value |
| Main carrier frequency point 4 | RSCP4 value |
| Main carrier frequency point 5 | RSCP5 value |
| Main carrier frequency point 7 | RSCP7 value |
Table 4:
| Main carrier frequency point 1 | RSCP1 value |
| Main carrier frequency point 4 | RSCP4 value |
| Main carrier frequency point 7 | RSCP7 value |
The second performance, first according to the main carrier frequency point of the selecting corresponding descending order of RSSI value respectively, each main carrier frequency point of selecting is sorted, then measure successively the RSCP value of each main carrier frequency point, often measure the RSCP value of a main carrier frequency point, whether the RSCP value that just judgement measures surpasses the second gravity treatment threshold value, if the determination result is NO, continue to measure the RSCP value of next main carrier frequency point, if the determination result is YES, stop measuring, determine and exist at least one RSCP value to surpass the second gravity treatment threshold value, this main carrier frequency point is the main carrier frequency point that the RSCP value of determining surpasses the second gravity treatment threshold value, for example, according to the order that RSSI value is descending, main carrier frequency point in table 2 is arranged, obtain the main carrier frequency point list shown in table 5, first measure main carrier frequency and put the RSCP value of 4 correspondences, whether the RSCP value that then judgement is measured has surpassed the second gravity treatment threshold value, if, stop measuring, if not, continue to measure main carrier frequency point 1.
Table 5:
| Main carrier frequency point 4 |
| Main carrier frequency point 1 |
| Main carrier frequency point 3 |
| Main carrier frequency point 7 |
| Main carrier frequency point 5 |
For above-mentioned the first performance, when multimode terminal gravity treatment enters second network, can in main carrier frequency point corresponding to the RSCP value that surpasses the second gravity treatment threshold value, choose at random a main carrier frequency point, then gravity treatment enters the second network Zhong community of current this main carrier frequency point of use; Also can be in surpassing the RSCP value of the second gravity treatment threshold value, select maximum RSCP value, then in second network, determine main carrier frequency Dian community corresponding to RSCP value that current use is selected, gravity treatment enters the community of determining, the available signal power that shows the main carrier frequency Dian community that current use is corresponding because RSCP value is maximum is maximum, thus gravity treatment to enter this community be optimal selection.
For above-mentioned the second performance, when multimode terminal gravity treatment enters second network, can be first in second network, determine main carrier frequency Dian community corresponding to RSCP value that surpasses the second gravity treatment threshold value that current use is determined, and gravity treatment enters the community of determining, due to the maximum words of RSSI value of main carrier frequency point generally, it is also maximum that this main carrier frequency is put corresponding RSCP value, therefore according to the descending order of RSSI value, measure successively RSCP value, the RSCP value that surpasses the second gravity treatment thresholding of determining is so just maximum RSCP value.
Each main carrier frequency point that in above-mentioned the second performance, multimode terminal need to not selected for step 22 is measured, and therefore can effectively save system resource.
If step 23 is not determined the RSCP value that surpasses the second gravity treatment threshold value, multimode terminal can carry out LAU and RAU according to the mode of prior art in first network, resides in first network, and after LAU and RAU complete, gravity treatment enters second network, carries out LAU and RAU in second network.
Suppose that multimode terminal resident community in second network is community A, when multimode terminal processed voice business, can switch to first network processed voice business (first network is the preferential bearer network of speech business), after speech business finishes, the technical scheme gravity treatment that multimode terminal adopts the embodiment of the present invention to propose enters second network, if multimode terminal gravity treatment enters second network Zhong community A, this multimode terminal is without carrying out RAU and LAU again, if multimode terminal gravity treatment enters second network Zhong community B, this multimode terminal still needs to carry out RAU and LAU.
In the embodiment of the present invention, first network can be, but not limited to as the preferential bearer network of speech business, second network can be, but not limited to as preferential residing network, the business that multimode terminal is processed in first network is so speech business, wherein the multimode terminal in the embodiment of the present invention can be, but not limited to the multimode terminal into TD-SCDMA/GSM, WCDMA/GSM multimode terminal, CDMA 2000/GSM multimode terminal, when being TD-SCDMA/GSM multimode terminal, first network is GSM network, second network is TD-SCDMA network, when being WCDMA/GSM multimode terminal, first network is GSM network, second network is WCDMA network, when being CDMA 2000/GSM multimode terminal, first network is GSM network, second network is CDMA2000 network.
From above-mentioned processing procedure, in embodiment of the present invention technical scheme, when multimode terminal is processed business in first network, measure the RSSI value corresponding to each main carrier frequency point difference of second network, and select RSSI value over the main carrier frequency point of the first gravity treatment threshold value, when receiving the channel release message that first network issues after above-mentioned service ending, determine whether to exist at least one RSCP value to surpass the second gravity treatment threshold value, in definite result when being, this multimode terminal gravity treatment enters second network, therefore, multimode terminal finishes after current business in first network, without carrying out RAU and LAU, it is re eligible access second network, can effectively reduce system resources consumption, reduce presence of intercell interference, capacity, thereby improve service quality.
Provide more specifically execution mode below.
If first network is the preferential bearer network of speech business, be specially GSM network, second network is the preferential bearer network of data service, also be preferential residing network, be specially TD-SCDMA network, multimode terminal is TD terminal, as shown in Figure 4, for the network reselection method specific implementation flow chart of multimode terminal in the embodiment of the present invention, its concrete processing procedure is as follows:
Accordingly, the embodiment of the present invention also proposes a kind of multi-mode terminal equipment, and its structure as shown in Figure 5, comprises measuring unit 51, selected cell 52, receiving element 53, determining unit 54 and gravity treatment unit 55:
Measuring unit 51, when first network is processed business, measures the RSSI value corresponding to each main carrier frequency point difference of second network for above-mentioned multi-mode terminal equipment;
Receiving element 53, the Channel Release message issuing after above-mentioned service ending for receiving first network;
Determining unit 54, when receiving Channel Release message at receiving element 53, determines whether main carrier frequency point that selected cell 52 selects respectively in corresponding RSCP value, exists at least one RSCP value over the second gravity treatment threshold value;
Preferably, determining unit 54 comprises the first measurement subelement, comparison subelement and first definite subelement, wherein:
First measures subelement, RSCP value corresponding to each main carrier frequency point difference of selecting for measuring selected cell 52;
Relatively subelement, compares for each RSCP value and the second gravity treatment threshold value that the first measurement subelement is measured;
First determines subelement, for according to the comparative result that compares subelement, determines whether to exist at least one RSCP value to surpass the second gravity treatment threshold value.
Preferably, determining unit 54 comprises the second measurement subelement, judgment sub-unit and second definite subelement, wherein:
Second measures subelement, for the main carrier frequency point selected according to the selected cell 52 corresponding descending order of RSSI value respectively, measure successively each main carrier frequency that selected cell 52 selects and put corresponding RSCP value, until judgment sub-unit is judged the RSCP value measuring, surpassed the second gravity treatment threshold value;
Judgment sub-unit, for judging whether the RSCP value that the second measurement subelement measures surpasses the second gravity treatment threshold value;
Second determines subelement, while having surpassed the second gravity treatment threshold value for judge the RSCP value measuring in judgment sub-unit, determines and exists at least one RSCP value to surpass the second gravity treatment threshold value.
Preferably, gravity treatment unit 55 comprises chooser unit, the 3rd definite subelement and gravity treatment subelement, wherein:
Chooser unit, for the RSCP value surpassing the second gravity treatment threshold value, selects maximum RSCP value;
The 3rd determines subelement, at second network, determines main carrier frequency Dian community corresponding to RSCP value of selecting current use chooser unit;
Gravity treatment subelement, enters the 3rd for gravity treatment and determines the community that subelement is determined.
Preferably, above-mentioned gravity treatment unit 55 enters second network according to cell selectionindicator after release of all TCH and SDCCH information gravity treatment of carrying in Channel Release message.
The embodiment of the present invention also provides a kind of communication system, and its structure as shown in Figure 6, comprises system message transmitting apparatus 61 and at least one multimode terminal 62, wherein:
System message transmitting apparatus 61, for before described multimode terminal 62 enters other communication systems, while residing in described communication system, each main carrier frequency point, the first gravity treatment threshold value and the second gravity treatment threshold value of described communication system are handed down to described multimode terminal 62 by system message;
Multimode terminal 62, for when described other communication systems are processed business, the RSSI value corresponding to each main carrier frequency point difference of carrying in the described system message that measurement receives, and according to measurement result, select the main carrier frequency point that RSSI value surpasses the first gravity treatment threshold value of carrying in described system message, and while receiving the Channel Release message that described other communication systems issue after described service ending, definite main carrier frequency point of selecting is distinguished in corresponding RSCP value, whether exist at least one RSCP value to surpass the second gravity treatment threshold value of carrying in described system message, when determining at least one RSCP value of existence over described the second gravity treatment threshold value, gravity treatment enters described communication system.
Wherein, the business that multimode terminal is processed in described other communication systems can be, but not limited to as speech business, and now described other communication systems are that communication system is preferentially carried in speech business, and described communication system is preferential resident communication system.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (12)
1. a network reselection method for multimode terminal, is characterized in that, comprising:
When multimode terminal is processed business in first network, measure the received signal strength indicator RSSI value corresponding to each main carrier frequency point difference of second network; And
According to measurement result, select the main carrier frequency point that RSSI value surpasses the first gravity treatment threshold value;
When described multimode terminal receives the channel release message that first network issues after described service ending, determine whether the main carrier frequency point selected respectively in corresponding received signal code power RSCP value, exists at least one RSCP value over the second gravity treatment threshold value;
Described multimode terminal is when determining at least one RSCP value of existence over the second gravity treatment threshold value, and gravity treatment enters described second network;
Wherein, the preferential residing network that described second network is described multimode terminal.
2. whether the network reselection method of multimode terminal as claimed in claim 1, is characterized in that, definite main carrier frequency point of selecting is distinguished in corresponding received signal code power RSCP value, exist at least one RSCP value to surpass the second gravity treatment threshold value, comprising:
RSCP value corresponding to each main carrier frequency point difference that measurement is selected;
Respectively each RSCP value of measuring and the second gravity treatment threshold value are compared;
According to comparative result, determine whether to exist at least one RSCP value to surpass the second gravity treatment threshold value.
3. whether the network reselection method of multimode terminal as claimed in claim 1, is characterized in that, definite main carrier frequency point of selecting is distinguished in corresponding received signal code power RSCP value, exist at least one RSCP value to surpass the second gravity treatment threshold value, comprising:
According to the main carrier frequency point of the selecting corresponding descending order of RSSI value respectively, measure successively each main carrier frequency of selecting and put corresponding RSCP value; And
Whether the RSCP value that measures of judgement surpasses the second gravity treatment threshold value, until when judging the RSCP value measuring and having surpassed the second gravity treatment threshold value, determine that at least one RSCP value of existence is over the second gravity treatment threshold value.
4. the network reselection method of multimode terminal as claimed in claim 1, is characterized in that, described multimode terminal gravity treatment enters described second network, comprising:
Described multimode terminal, in surpassing the RSCP value of the second gravity treatment threshold value, is selected maximum RSCP value; And
In second network, determine main carrier frequency Dian community corresponding to RSCP value that current use is selected;
Described multimode terminal gravity treatment enters the community of determining.
5. the network reselection method of multimode terminal as claimed in claim 1, is characterized in that, described multimode terminal gravity treatment enters described second network, comprising:
Described multimode terminal enters described second network according to the cell reselection indication information gravity treatment of the whole transmission channels that carry in described channel release message and Separate Dedicated Control Channel.
6. the network reselection method of multimode terminal as claimed in claim 1, it is characterized in that, each main carrier frequency point, the first gravity treatment threshold value and the second gravity treatment threshold value of described second network be before described multimode terminal enters first network, while residing in described second network, by second network, by system message, be handed down to described multimode terminal.
7. a multi-mode terminal equipment, is characterized in that, comprising:
Measuring unit, be used for described multi-mode terminal equipment when first network is processed business, measure the received signal strength indicator RSSI value corresponding to each main carrier frequency point difference of second network, wherein, the preferential residing network that described second network is described multi-mode terminal equipment;
Selected cell, for each main carrier frequency point at second network, according to the measurement result of measuring unit, selects the main carrier frequency point that the RSSI value of measuring surpasses the first gravity treatment threshold value;
Receiving element, the channel release message issuing after described service ending for receiving first network;
Determining unit, for when receiving element receives described channel release message, determines whether main carrier frequency point that selected cell selects respectively in corresponding received signal code power RSCP value, exists at least one RSCP value over the second gravity treatment threshold value;
Gravity treatment unit, for the definite result in determining unit, when being, gravity treatment enters described second network.
8. multi-mode terminal equipment as claimed in claim 7, is characterized in that, described determining unit comprises:
First measures subelement, RSCP value corresponding to each main carrier frequency point difference of selecting for measuring selected cell;
Relatively subelement, compares for each RSCP value and the second gravity treatment threshold value of respectively the first measurement subelement being measured;
First determines subelement, for according to the comparative result that compares subelement, determines whether to exist at least one RSCP value to surpass the second gravity treatment threshold value.
9. multi-mode terminal equipment as claimed in claim 7, is characterized in that, described determining unit comprises:
Second measures subelement, for the main carrier frequency point selected according to the selected cell corresponding descending order of RSSI value respectively, measure successively each main carrier frequency that selected cell selects and put corresponding RSCP value, until judgment sub-unit is judged the RSCP value measuring, surpassed the second gravity treatment threshold value;
Judgment sub-unit, for judging whether the RSCP value that the second measurement subelement measures surpasses the second gravity treatment threshold value;
Second determines subelement, while having surpassed the second gravity treatment threshold value for judge the RSCP value measuring in judgment sub-unit, determines and exists at least one RSCP value to surpass the second gravity treatment threshold value.
10. multi-mode terminal equipment as claimed in claim 7, is characterized in that, described gravity treatment unit comprises:
Chooser unit, the RSCP for surpassing the second gravity treatment threshold value, selects maximum RSCP value;
The 3rd determines subelement, at second network, determines main carrier frequency Dian community corresponding to RSCP value of selecting current use chooser unit;
Gravity treatment subelement, enters the 3rd for gravity treatment and determines the described community that subelement is determined.
11. multi-mode terminal equipments as claimed in claim 7, is characterized in that, described gravity treatment unit enters described second network according to the cell reselection indication information gravity treatment of the whole transmission channels that carry in described channel release message and Separate Dedicated Control Channel.
12. 1 kinds of communication systems, is characterized in that, comprise system message transmitting apparatus and at least one multimode terminal, wherein:
System message transmitting apparatus, for before described multimode terminal enters other communication systems, while residing in described communication system, each main carrier frequency point, the first gravity treatment threshold value and the second gravity treatment threshold value of described communication system are handed down to described multimode terminal by system message, wherein, the preferential resident communication system that described communication system is described multimode terminal;
Multimode terminal, for when described other communication systems are processed business, the received signal strength indicator RSSI value corresponding to each main carrier frequency point difference of carrying in the described system message that measurement receives, and according to measurement result, select the main carrier frequency point that RSSI value surpasses the first gravity treatment threshold value of carrying in described system message, and while receiving the channel release message that described other communication systems issue after described service ending, definite main carrier frequency point of selecting is distinguished in corresponding received signal code power RSCP value, whether exist at least one RSCP value to surpass the second gravity treatment threshold value of carrying in described system message, when determining at least one RSCP value of existence over described the second gravity treatment threshold value, gravity treatment enters described communication system.
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| CN104519510B (en) * | 2013-09-30 | 2018-02-23 | 中国移动通信集团北京有限公司 | A kind of optimization method and device of cell reselection parameters |
| CN104717708B (en) * | 2013-12-13 | 2018-03-13 | 深圳市海思半导体有限公司 | The method and apparatus for quickly returning to former network |
| EP3057359B1 (en) * | 2014-06-23 | 2019-06-19 | Huawei Technologies Co. Ltd. | Network switching method and terminal |
| US20220264385A1 (en) * | 2019-07-16 | 2022-08-18 | Beijing Xiaomi Mobile Software Co., Ltd. | Information processing method and apparatus, and computer storage medium |
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