CN102264121A - 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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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 the 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
Commercial digital mobile communication system largest, that coverage is the widest is global system for mobile communications (GSM, Global System for Mobile Communication) in the global range at present.Gsm system is commonly referred to as second generation mobile communication (2G, The 2nd Generation Mobile Communication) system.Continuous development along with mobile communication technology, adopt code division multiple access to insert (CDMA, Code DivisionMultiple Access) 3G (Third Generation) Moblie of technology (3G, The 3rd Generation MobileCommunication) system also maybe will enter commercial stage.The 3G system is a 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 the GSM network exists simultaneously and merge day by day makes dual-mode terminal occur in a large number and has obtained extensive use.So-called " bimodulus " just is meant that terminal equipment can be operated under two network schemers, for example, the TD-SCDMA/GSM dual-mode terminal can be operated in TD-SCDMA network and GSM network, and the WCDMA/GSM dual-mode terminal can be operated in WCDMA network and GSM network, or the like.
With TD-SCDMA/GSM dual-mode terminal (hereinafter to be referred as the TD terminal) is that example describes.Stipulated following principle in the prior art: 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, the TD terminal is initiated speech business in the TD-SCDMA network.According to the preferential carry voice traffic principle of GSM network, the current speech business switches to the GSM network from the TD-SCDMA network.When the current speech service ending, the TD terminal resides in the GSM network, this moment the TD terminal wireless access network (RAT, Radio Access Network) type changes, by universal mobile telecommunications system terrestrial access network (UTRAN, Universal Mobile Telecommunication SystemTerritorial Radio Access Network) becomes GSM/ enhanced data rates for gsm evolution system Radio Access Network (GERAN, GSM/EDGE Radio Access Network; EDGE:Enhanced Datarates for GSM Evolution).The TD terminal is under the situation that the RAT type changes, Location Area Code (LAC no matter, Location Area Code) whether changes and all need to carry out location area updating (LAU, Location Area Update) and Routing Area Update (RAU, Routing Area Update), so the TD terminal will be carried out LAU and RAU in the GSM network, general 5-10 consuming time second.According to the preferential resident TD-SCDMA network principle of TD terminal, the TD terminal enters the TD-SCDMA network with gravity treatment, the RAT type of TD terminal will change once more, become UTRAN from GERAN, in like manner the TD terminal will be carried out LAU and RAU in the TD-SCDMA network, general 5-10 consuming time second, concrete sequential schematic diagram sees also Fig. 1.
Finish the scheme that gravity treatment enters the TD-SCDMA network after the current speech business according to existing TD terminal, a large amount of TD terminals is behind each conclusion sound business, all need to carry out 10-20 LAU and the RAU of second, make system resources consumption bigger, 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 the 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 the current speech business enters the CDMA2000 network and have the problems referred to above equally.
Summary of the invention
The embodiment of the invention provides a kind of network reselection method and multi-mode terminal equipment of multimode terminal, bigger in order to solve the system resources consumption that multimode terminal exists in the prior art in the network reselection process, and problems such as presence of intercell interference enhancing, power system capacity reduction.
The embodiment of the invention also provides a kind of communication system.
Embodiment of the invention technical scheme is as follows:
A kind of network reselection method of multimode terminal, the method comprising the steps of: when multimode terminal is managed business in first network, measure the corresponding respectively received signal intensity indicating RSSI value of each main carrier frequency point of second network; And, select the main carrier frequency point that the RSSI value surpasses the first gravity treatment threshold value according to measurement result; When described multimode terminal receives the channel release message that first network issues after described service ending, determine whether exist at least one RSCP value above the second gravity treatment threshold value in the corresponding respectively received signal code power RSCP value of the main carrier frequency point selected; Described multimode terminal is when determining at least one RSCP value of existence above the second gravity treatment threshold value, and gravity treatment enters described second network.
A kind of multi-mode terminal equipment comprises: measuring unit, be used for described multi-mode terminal equipment when first network is managed business, and measure the corresponding respectively received signal intensity indicating RSSI value of each main carrier frequency point of second network; Selected cell is used for each the 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 is used to receive the channel release message that first network issues after described service ending; Whether determining unit is used for when receiving element receives described channel release message, determine to exist at least one RSCP value to surpass the second gravity treatment threshold value in the received signal code power RSCP value of the main carrier frequency point difference correspondence that selected cell is selected; The gravity treatment unit is used in definite result of 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: the system message transmitting apparatus, before being used for residing in described communication system, 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 is handed down to described multimode terminal by system message at described multimode terminal; Multimode terminal, be used for when described other communication systems are managed business, the received signal intensity indicating RSSI value that each the main carrier frequency point that carries in the described system message that measurement receives is corresponding respectively, and according to measurement result, select the main carrier frequency point that the RSSI value surpasses the first gravity treatment threshold value of carrying in the described system message, and when receiving the channel release message that described other communication systems issue after described service ending, determine in the corresponding respectively received signal code power RSCP value of the main carrier frequency point selected, whether exist at least one RSCP value to surpass the second gravity treatment threshold value of carrying in the described system message, determining when having at least one RSCP value above the described second gravity treatment threshold value, gravity treatment enters described communication system.
In the embodiment of the invention technical scheme, when multimode terminal is managed business in first network, measure the corresponding respectively RSSI value of each main carrier frequency point of second network, and select the main carrier frequency point that the RSSI value surpasses 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 the result who determines when being, this multimode terminal gravity treatment enters second network, therefore, multimode terminal finishes current business in first network after, need not to carry out RAU and LAU is that re eligible inserts second network, can effectively reduce system resources consumption, reduce presence of intercell interference, the elevator system capacity, thus improve service quality.
Description of drawings
Fig. 1 is in the 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 invention, the network reselection method schematic flow sheet of multimode terminal;
Fig. 3 is in the 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 invention, the network reselection method specific implementation schematic flow sheet of multimode terminal;
Fig. 5 is in the embodiment of the invention, the multi-mode terminal equipment structural representation;
Fig. 6 is in the embodiment of the invention, the communication system architecture schematic diagram.
Embodiment
At length set forth to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
Multimode terminal in the embodiment of the invention can but be not limited to dual-mode terminal, for example can also be three mould terminals.
At multimode terminal, stipulated its preferential resident network schemer in the prior art, the embodiment of the invention is called preferential residing network with the mobile communications network of this network schemer correspondence; At multimode terminal, also stipulated the network schemer of preferential its speech business of carrying in the prior art, the embodiment of the invention is called the preferential bearer network of speech business with the mobile communications network of this network schemer correspondence; At multimode terminal, also stipulated the network schemer of preferential its data service of carrying in the prior art, the mobile communications network with this network schemer correspondence in the embodiment of the invention is called the preferential bearer network of data service.Generally speaking, 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 the TD-SCDMA/GSM multimode terminal, the preferential bearer network of speech business is the GSM network, and preferential residing network is that the preferential bearer network of data service is the TD-SCDMA network; For the WCDMA/GSM multimode terminal, the preferential bearer network of speech business is the GSM network, and preferential residing network is that the preferential bearer network of data service is the WCDMA network; For CDMA 2000/GSM multimode terminal, the preferential bearer network of speech business is the GSM network, and preferential residing network is that the preferential bearer network of data service is CDMA 2000 networks.Certainly, can stipulate that also the preferential bearer network of preferential residing network and speech business is a consolidated network, this moment, preferential residing network and the preferential bearer network of data service were heterogeneous networks.If it is inequality that network is preferentially carried in the preferential residing network of multimode terminal and professional (speech business or data service), then multimode terminal is after finishing this business, all can adopt the scheme that provides in the prior art to carry out network reselection, cause system resources consumption bigger, and cause presence of intercell interference enhancing, power system capacity to reduce.
The embodiment of the invention provides a kind of network reselection method of multimode terminal, and as shown in Figure 2, its concrete processing procedure is as follows:
When step 21, multimode terminal are managed business, measure corresponding respectively received signal intensity indication (RSSI, the Received Signal Strength Indication) value of each main carrier frequency point of second network in first network;
Wherein if the business that multimode terminal is handled is speech business, then first network is the preferential bearer network of speech business, second network is the preferential bearer network of data service, it also is preferential residing network, if the business that multimode terminal is handled is data service, then 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 but be not limited to adopt following dual mode to obtain each main carrier frequency point of second network:
First kind of mode, 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 multimode terminal in advance, follow-up multimode terminal is when carrying out network reselection, can directly carry out gravity treatment according to the above-mentioned information of storage, when the main carrier frequency point of second network changes, need upgrade canned data in the multimode terminal;
The second way, multimode terminal enters before first network, when residing in second network, second network can be notified to multimode terminal with all main carrier frequency points, the first gravity treatment threshold value and the second gravity treatment threshold value of second network by system message, second network can insert above-mentioned information in the redundant bit position of existing systems 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 the system message also can respective change, and this has just realized the renewal of information.
In the embodiment of the invention, multimode terminal is managed business in first network in the process of (data service or speech business), measures the RSSI value of each main carrier frequency point of second network, if second network has 9 main carrier frequency points, second network measure to 9 a RSSI value then, can but be not limited to as shown in table 1.
Table 1:
| Main carrier frequency point 1 | The RSSI1 value |
| Main carrier frequency point 2 | The RSSI2 value |
| Main carrier frequency point 3 | The RSSI3 value |
| Main carrier frequency point 4 | The RSSI4 value |
| Main carrier frequency point 5 | The RSSI5 value |
| Main carrier frequency point 6 | The RSSI6 value |
| Main carrier frequency point 7 | The RSSI7 value |
| Main carrier frequency point 8 | The RSSI8 value |
| Main carrier frequency point 9 | The 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 the bin width, comprise the power of useful signal, the power of interference signal and the power of background noise, if the RSSI value of main carrier frequency point surpasses the first gravity treatment threshold value, prove that then the summation that drops on the signal power in the bin width is bigger, but can not prove that the power of useful signal is bigger.
Each the RSSI value in the 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 can send Channel Release message to this multimode terminal after multimode terminal is handled the preferential loaded service of first network (speech business or data service).
R6 version 3 GPP agreement is made following regulation: the TD terminal is behind GSM network conclusion sound business, the GSM network is judged terminal capability, if the TD-SCDMA/GSM multimode terminal then carries the sub-district gravity treatment 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 that sends to this TD terminal; TCH:Traffic Channel; SDCCH:Stand-Alone Dedicated Control Channel) information, comprise optimum TD-SCDMA information of adjacent cells in this Indication message, information such as frequency, code word, synchronization timing for example, indication TD terminal does not reside in the GSM network, and directly gravity treatment inserts the TD-SCDMA network, the TD terminal inserts the TD-SCDMA network according to the Channel Release message gravity treatment that receives, concrete sequential schematic diagram sees also Fig. 3, and wherein R6 version 3 GPP agreement is referred to as fast return (Fast Return) function.
But existing GSM network seldom is held in and carries cell selectionindicator after release of all TCH and SDCCH information in the Channel Release message; Secondly, existing GSM network does not comprise the frequency point information tabulation of different system in the back-up system message, if and in Channel Release message, carry cell selection indicator after release of all TCH and SDCCH information, the TD-SCDMA information of adjacent cells that just need comprise an optimum, then need the GSM network to issue the frequency point information tabulation of different system by system message, that is to say, in order to realize the FastReturn function of R6 version 3 GPP agreement regulation, all need carry out the signaling process of upgrading to existing GSM network side and end side to support to be correlated with, upgrading at GSM network air interface involves a wide range of knowledge, compatibility has a big risk, the cost height, cycle is long, is difficult for realizing.
If by existing GSM network side and end side are all carried out upgrading, make and carry cell selection indicator after release of all TCH and SDCCH information in the ChannelRelease message that then 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 that receives.
If step 22 is not selected RSSI to the main carrier frequency point that surpasses the first gravity treatment threshold value, then 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 gravity treatment enters second network after LAU and RAU finish, and carries out LAU and RAU in second network.
If select in the step 22 at least one RSSI value above the main carrier frequency point of the first gravity treatment threshold value, then multimode terminal when receiving the Channel Release message that first network issues after above-mentioned service ending, determine whether to exist the corresponding RSCP value of at least one main carrier frequency point of selecting to surpass the second gravity treatment threshold value, the RSCP value that wherein determines whether to exist at least one main carrier frequency point of selecting correspondence above the process of the second gravity treatment threshold value can but be not limited to following two kinds of performances:
First kind of performance, at first measure the corresponding respectively RSCP value of selecting of each main carrier frequency point, each the RSCP value and the second gravity treatment threshold value measured 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 the main carrier frequency point in the difference meter 2, obtain the corresponding relation of main carrier frequency point shown in the table 3 and RSCP value, then each RSCP value is compared with the second gravity treatment threshold value respectively, determine 3 RSCP values at last 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 | The RSCP1 value |
| Main carrier frequency point 3 | The RSCP3 value |
| Main carrier frequency point 4 | The RSCP4 value |
| Main carrier frequency point 5 | The RSCP5 value |
| Main carrier frequency point 7 | The RSCP7 value |
Table 4:
| Main carrier frequency point 1 | The RSCP1 value |
| Main carrier frequency point 4 | The RSCP4 value |
| Main carrier frequency point 7 | The RSCP7 value |
Second kind of performance, at first according to the corresponding respectively descending order of RSSI value of the main carrier frequency point of selecting, each main carrier frequency point of selecting is sorted, measure the RSCP value of each main carrier frequency point then successively, whenever measure the RSCP value of a main carrier frequency point, just judge whether the RSCP value that measures surpasses the second gravity treatment threshold value, if judged result is for denying, then continue to measure the RSCP value of next main carrier frequency point, if judged result then stops to measure for being, determine to 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, the point of the main carrier frequency in the table 2 is arranged, obtained the main carrier frequency point tabulation shown in the table 5 according to the order that the RSSI value is descending, at first measure main carrier frequency and put the RSCP value of 4 correspondences, judge then whether the RSCP value of measuring has surpassed the second gravity treatment threshold value, if then stop to measure, if not, then 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 |
At above-mentioned first kind of performance, when the multimode terminal gravity treatment enters second network, can choose at random a main carrier frequency point in the main carrier frequency point of the RSCP value correspondence that surpasses the second gravity treatment threshold value, gravity treatment enters the sub-district in second network of current this main carrier frequency point of use then; Also can be in surpassing the RSCP value of the second gravity treatment threshold value, select maximum RSCP value, then in second network, determine the sub-district of the main carrier frequency point of the RSCP value correspondence that current use is selected, gravity treatment enters the sub-district of determining, show the available signal power maximum of the sub-district of the current main carrier frequency point that uses correspondence because RSCP value is maximum, thus gravity treatment to enter this sub-district be optimal selection.
At above-mentioned second kind of performance, when the multimode terminal gravity treatment enters second network, can be at first in second network, determine the sub-district of the main carrier frequency point of the RSCP value correspondence that surpasses the second gravity treatment threshold value that current use is determined, and gravity treatment enters the sub-district of determining, because the words of the RSSI value maximum of main carrier frequency point generally speaking, the RSCP value that this main carrier frequency point is corresponding is also maximum, therefore according to the descending order of RSSI value measure R SCP value successively, the RSCP value of determining so that surpasses the second gravity treatment thresholding just is the RSCP value of maximum.
Multimode terminal need all not measured at each main carrier frequency point that step 22 is selected in above-mentioned second kind of performance, therefore can save system resource effectively.
If step 23 is not determined the RSCP value that surpasses the second gravity treatment threshold value, then multimode terminal can carry out LAU and RAU according to the mode of prior art in first network, resides in first network, and gravity treatment enters second network after LAU and RAU finish, and carries out LAU and RAU in second network.
Suppose that multimode terminal resident sub-district in second network is sub-district A, when the multimode terminal processed voice is professional, can switch to the first network processes speech 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 invention to propose enters second network, if the multimode terminal gravity treatment enters the sub-district A in second network, then this multimode terminal need not to carry out RAU and LAU again, if the multimode terminal gravity treatment enters the sub-district B in second network, then this multimode terminal still need carry out RAU and LAU.
In the embodiment of the invention, first network can but be not limited to the preferential bearer network of speech business, second network can but be not limited to preferential residing network, the business handled in first network of multimode terminal is speech business so, wherein the multimode terminal in the embodiment of the invention can but be not limited to the TD-SCDMA/GSM multimode terminal, the WCDMA/GSM multimode terminal, CDMA 2000/GSM multimode terminal, when being the TD-SCDMA/GSM multimode terminal, first network is the GSM network, second network is the TD-SCDMA network, when being the WCDMA/GSM multimode terminal, first network is the GSM network, second network is the WCDMA network, when being CDMA 2000/GSM multimode terminal, first network is the GSM network, and second network is the CDMA2000 network.
By above-mentioned processing procedure as can be known, in the embodiment of the invention technical scheme, when multimode terminal is managed business in first network, measure the corresponding respectively RSSI value of each main carrier frequency point of second network, and select the main carrier frequency point that the RSSI value surpasses 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 the result who determines when being, this multimode terminal gravity treatment enters second network, therefore, multimode terminal finishes current business in first network after, need not to carry out RAU and LAU is that re eligible inserts second network, can effectively reduce system resources consumption, reduce presence of intercell interference, the elevator system capacity, thus improve service quality.
Provide more specifically execution mode below.
If first network is the preferential bearer network of speech business, be specially the GSM network, second network is the preferential bearer network of data service, it also is preferential residing network, be specially the TD-SCDMA network, multimode terminal is the TD terminal, as shown in Figure 4, be the network reselection method specific implementation flow chart of multimode terminal in the embodiment of the invention, its concrete processing procedure is as follows:
When step 41, TD terminal reside in the TD-SCDMA network, receive the system message that the TD-SCDMA network issues, comprise each main carrier frequency point, the first gravity treatment threshold value and the second gravity treatment threshold value of TD-SCDMA network in this system message;
When step 45, TD terminal finish the current speech business, receive the ChannelRelease message that the GSM network issues;
Accordingly, the embodiment of the invention also proposes a kind of multi-mode terminal equipment, and its structure comprises measuring unit 51, selected cell 52, receiving element 53, determining unit 54 and gravity treatment unit 55 as shown in Figure 5:
Measuring unit 51 is used for above-mentioned multi-mode terminal equipment when first network is managed business, and measures the corresponding respectively RSSI value of each main carrier frequency point of second network;
Receiving element 53 is used to receive the Channel Release message that first network issues after above-mentioned service ending;
Whether determining unit 54 is used for when receiving element 53 receives Channel Release message, determine to exist at least one RSCP value to surpass the second gravity treatment threshold value in the RSCP value of the main carrier frequency point difference correspondence that selected cell 52 is selected;
Preferably, determining unit 54 comprises that first measures subelement, comparison subelement and first definite subelement, wherein:
First measures subelement, is used to measure the corresponding respectively RSCP value of each main carrier frequency point that selected cell 52 is selected;
Relatively subelement is used for each the RSCP value and the second gravity treatment threshold value that the first measurement subelement is measured are compared;
First determines subelement, is used 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 that second measures subelement, judgment sub-unit and second definite subelement, wherein:
Second measures subelement, the main carrier frequency point that is used for selecting according to selected cell 52 is distinguished the corresponding descending order of RSSI value, measure the corresponding RSCP value of each main carrier frequency point that selected cell 52 is selected successively, judge the RSCP value that measures until judgment sub-unit and surpassed the second gravity treatment threshold value;
Judgment sub-unit is used to judge whether the RSCP value that the second measurement subelement measures surpasses the second gravity treatment threshold value;
Second determines subelement, is used for determining to exist at least one RSCP value above the second gravity treatment threshold value when judgment sub-unit is judged the RSCP value that measures and surpassed the second gravity treatment threshold value.
Preferably, gravity treatment unit 55 comprises chooser unit, the 3rd definite subelement and gravity treatment subelement, wherein:
The chooser unit is used for selecting maximum RSCP value in the RSCP value that surpasses the second gravity treatment threshold value;
The 3rd determines to be used for subelement at second network, determines the sub-district of the main carrier frequency point of the RSCP value correspondence selected current use chooser unit;
The gravity treatment subelement is used for gravity treatment and enters the sub-district that the 3rd definite 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 the Channel Release message.
The embodiment of the invention also provides a kind of communication system, and its structure comprises system message transmitting apparatus 61 and at least one multimode terminal 62 as shown in Figure 6, wherein:
System message transmitting apparatus 61, be used for before described multimode terminal 62 enters other communication systems, when 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 is handed down to described multimode terminal 62 by system message;
Multimode terminal 62, be used for when described other communication systems are managed business, the RSSI value that each the main carrier frequency point that carries in the described system message that measurement receives is corresponding respectively, and according to measurement result, select the main carrier frequency point that the RSSI value surpasses the first gravity treatment threshold value of carrying in the described system message, and when receiving the Channel Release message that described other communication systems issue after described service ending, determine in the corresponding respectively RSCP value of the main carrier frequency point selected, whether exist at least one RSCP value to surpass the second gravity treatment threshold value of carrying in the described system message, determining when having at least one RSCP value above the described second gravity treatment threshold value, gravity treatment enters described communication system.
Wherein, the business that multimode terminal is handled in described other communication systems can but be not limited to speech business, this moment described other communication systems be that communication system is preferentially carried in speech business, described communication system is preferential resident communication system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the network reselection method of a multimode terminal is characterized in that, comprising:
When multimode terminal is managed business, measure the corresponding respectively received signal intensity indicating RSSI value of each main carrier frequency point of second network in first network; And
According to measurement result, select the main carrier frequency point that the 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 exist at least one RSCP value above the second gravity treatment threshold value in the corresponding respectively received signal code power RSCP value of the main carrier frequency point selected;
Described multimode terminal is when determining at least one RSCP value of existence above the second gravity treatment threshold value, and gravity treatment enters described second network.
2. whether the network reselection method of multimode terminal as claimed in claim 1 is characterized in that, determine to exist at least one RSCP value above the second gravity treatment threshold value in the corresponding respectively received signal code power RSCP value of the main carrier frequency point selected, to comprise:
The RSCP value that each main carrier frequency point that measurement is selected is corresponding respectively;
Each the RSCP value and the second gravity treatment threshold value that to measure respectively compare;
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, determine to exist at least one RSCP value above the second gravity treatment threshold value in the corresponding respectively received signal code power RSCP value of the main carrier frequency point selected, to comprise:
According to the corresponding respectively descending order of RSSI value of the main carrier frequency point of selecting, measure the corresponding RSCP value of selecting of each main carrier frequency point successively; And
Judge whether the RSCP value measure surpasses the second gravity treatment threshold value, when judging the RSCP value that measures and surpassed the second gravity treatment threshold value, determine that at least one RSCP value of existence is above 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 is selected maximum RSCP value in surpassing the RSCP value of the second gravity treatment threshold value; And
In second network, determine the sub-district of the main carrier frequency point of the RSCP value correspondence that current use is selected;
Described multimode terminal gravity treatment enters the sub-district 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 sub-district gravity treatment indication information gravity treatment of whole transmission channels that carry in the 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 is that described multimode terminal enters before first network, when residing in described second network, is handed down to described multimode terminal by second network by system message.
7. a multi-mode terminal equipment is characterized in that, comprising:
Measuring unit is used for described multi-mode terminal equipment when first network is managed business, and measures the corresponding respectively received signal intensity indicating RSSI value of each main carrier frequency point of second network;
Selected cell is used for each the 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 is used to receive the channel release message that first network issues after described service ending;
Whether determining unit is used for when receiving element receives described channel release message, determine to exist at least one RSCP value to surpass the second gravity treatment threshold value in the received signal code power RSCP value of the main carrier frequency point difference correspondence that selected cell is selected;
The gravity treatment unit is used in definite result of 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, is used to measure the corresponding respectively RSCP value of each main carrier frequency point that selected cell is selected;
Compare subelement, each the RSCP value and the second gravity treatment threshold value that are used for respectively the first measurement subelement being measured compare;
First determines subelement, is used 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, the main carrier frequency point that is used for selecting according to selected cell is distinguished the corresponding descending order of RSSI value, measure the corresponding RSCP value of each main carrier frequency point that selected cell is selected successively, judge the RSCP value that measures until judgment sub-unit and surpassed the second gravity treatment threshold value;
Judgment sub-unit is used to judge whether the RSCP value that the second measurement subelement measures surpasses the second gravity treatment threshold value;
Second determines subelement, is used for determining to exist at least one RSCP value above the second gravity treatment threshold value when judgment sub-unit is judged the RSCP value that measures and surpassed 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:
The chooser unit is used for selecting maximum RSCP value at the RSCP that surpasses the second gravity treatment threshold value;
The 3rd determines to be used for subelement at second network, determines the sub-district of the main carrier frequency point of the RSCP value correspondence selected current use chooser unit;
The gravity treatment subelement is used for gravity treatment and enters the described sub-district that the 3rd definite subelement is determined.
11. multi-mode terminal equipment as claimed in claim 7 is characterized in that, described gravity treatment unit enters described second network according to the sub-district gravity treatment indication information gravity treatment of whole transmission channels that carry in the described channel release message and Separate Dedicated Control Channel.
12. a communication system is characterized in that, comprises system message transmitting apparatus and at least one multimode terminal, wherein:
The system message transmitting apparatus, be used for before described multimode terminal enters other communication systems, when 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 is handed down to described multimode terminal by system message;
Multimode terminal, be used for when described other communication systems are managed business, the received signal intensity indicating RSSI value that each the main carrier frequency point that carries in the described system message that measurement receives is corresponding respectively, and according to measurement result, select the main carrier frequency point that the RSSI value surpasses the first gravity treatment threshold value of carrying in the described system message, and when receiving the channel release message that described other communication systems issue after described service ending, determine in the corresponding respectively received signal code power RSCP value of the main carrier frequency point selected, whether exist at least one RSCP value to surpass the second gravity treatment threshold value of carrying in the described system message, determining when having at least one RSCP value above the described second gravity treatment threshold value, gravity treatment enters described communication system.
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