CN102487538B - Cell switching method, device and system based on single frequency network - Google Patents
Cell switching method, device and system based on single frequency network Download PDFInfo
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Abstract
The invention discloses a cell switching method, a device and a system based on a single frequency network. The method comprises the following steps of: receiving the signal-to-noise ratios, reported by at least two base stations, of a same mobile terminal; arranging the signal-to-noise ratios of the same mobile terminal according to the size sequence and selecting the base station corresponding to the maximum signal-to-noise ratio, as a target base station of the mobile terminal; allocating a corresponding communication time slot which is positioned in a cell covered by the target base station to the mobile terminal; informing at least two base stations of sending a broadcast message, wherein the broadcast message at least carries a mobile terminal identifier, a target base station identifier and the communication time slot allocated to the mobile terminal; and after receiving the broadcast message and determining that the mobile terminal identifier is the same as the mobile terminal identifier carried by the broadcast message, enabling the mobile terminal to switch to the cell covered by the target base station and report data by use of the communication time slot. According to the invention, under the condition that the mobile terminal is not needed to report the wireless link quality test report, the cell switching of the single frequency network can be realized, and the uplink link resource loss can be reduced.
Description
Technical field
The present invention relates to Single Frequency Network field, be specifically related to a kind of cell switching method based on Single Frequency Network and device, system.
Background technology
Single Frequency Network (Single Frequency Network, SFN) be a radio network, in SFN several transmitting stations (referring generally to base station) at one time, launch identical wireless signal in same frequency, to realize the reliable covering to certain coverage.With traditional multi-frequency network (Multiple Frequency Network, MFN) compare, because Single Frequency Network does not need channeling in overlay area, wireless signal in the area of coverage can take the communication bandwidth of system complete, therefore can improve significantly the spectrum efficiency of wireless network.
In Single Frequency Network, in the time that a mobile terminal moves to the coverage of another community from the coverage of some communities, for not being interrupted, call need to carry out community switching, to ensure the communication quality of mobile terminal.Wherein.Existing a kind of cell switching method is as follows: in the time that move to another community mobile terminal Cong Yige community, mobile terminal need to be measured the radio link quality of neighbor cell, and measurement report is reported to the radio network controller in community, place, determine by this radio network controller whether mobile terminal needs to carry out community switching, and how to switch.
In practice, find, above-mentioned cell switching method needs the test report of mobile terminal reporting radio link quality, and mobile terminal is measured the downlink pilot support that the radio link quality of neighbor cell needs some, in the Single Frequency Network of time division multiple access, although can obtain downlink pilot by allocation of downlink, can lose uplink resource.Therefore, for Single Frequency Network, how to design a kind of test report without mobile terminal reporting radio link quality and realize community switch method become those skilled in the art's problem urgently to be resolved hurrily.
Summary of the invention
Embodiment of the present invention technical problem to be solved is to provide a kind of cell switching method based on Single Frequency Network and device, system, without mobile terminal reporting radio link quality test report in the situation that, can realize community and switch, reduce the loss of uplink resource.
Based on a cell switching method for Single Frequency Network, comprising:.
Receive the signal to noise ratio of the same mobile terminal that at least two base stations report;
The signal to noise ratio of the same mobile terminal that described at least two base stations are reported is arranged according to size order, and chooses the target BS of base station corresponding to maximum signal to noise ratio as described mobile terminal;
Be distributed in the communication time slot of correspondence in the community that described target BS covers to described mobile terminal;
Described in notice, at least two base stations send broadcast, described broadcast is at least carried the mark of the mark of described mobile terminal, described target BS and the communication time slot that described mobile terminal is assigned with, make described mobile terminal receive described broadcast and after the mark of confirming the mobile terminal that self identification carries with described broadcast is identical, switches to the community of described target BS covering and use described communication time slot uploading data.
A community switching device shifter based on Single Frequency Network, comprising:.
Receiving element, for receiving the signal to noise ratio of the same mobile terminal that at least two base stations report;
Choose unit, the signal to noise ratio of the same mobile terminal reporting for described at least two base stations that described receiving element is received is arranged according to size order, and chooses the target BS of base station corresponding to maximum signal to noise ratio as described mobile terminal;
Allocation units, for being distributed in corresponding communication time slot in the community that described target BS covers to described mobile terminal;
Notification unit, described in being used for notifying, at least two base stations send broadcast, described broadcast is at least carried the mark of the mark of described mobile terminal, described target BS and the communication time slot that described mobile terminal is assigned with, make described mobile terminal receive described broadcast and after the mark of confirming the mobile terminal that self identification carries with described broadcast is identical, switches to the community of described target BS covering and use described communication time slot uploading data.
A community switched system based on Single Frequency Network, comprising:.
At least two base stations, mobile terminal and above-mentioned community switching device shifters;
Described at least two base stations, for the signal to noise ratio of described mobile terminal is reported to described community switching device shifter, and sending broadcast according to the notice of described community switching device shifter, described broadcast is at least carried the mark of described mobile terminal, the mark of target BS and the communication time slot that described mobile terminal is assigned with;
Described mobile terminal, at least two broadcasts that base station sends described in being used for receiving, and after the mark of confirming the mobile terminal that self identification carries with described broadcast is identical, switches to the community of described target BS covering and use described communication time slot uploading data.
Compared with prior art, the embodiment of the present invention has following beneficial effect:
In the embodiment of the present invention, the signal to noise ratio of the same mobile terminal being reported by least two base stations of switching device shifter reception, community based on Single Frequency Network, and choose the target BS of base station corresponding to maximum signal to noise ratio as mobile terminal, be distributed in communication time slot corresponding in the community of target BS covering to mobile terminal after, notify at least two base stations to send broadcast, make mobile terminal receive broadcast after the mark of confirming the mobile terminal that self identification carries with broadcast is identical, switch to the community of target BS covering and use above-mentioned communication time slot uploading data.The cell switching method based on Single Frequency Network that the embodiment of the present invention provides and device, system can realize community without mobile terminal reporting radio link quality test report in the situation that to be switched, and reduces the loss of uplink resource.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is existing a kind of Single Frequency Network structural representation;
The schematic flow sheet of a kind of cell switching method based on Single Frequency Network that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet of the cell switching method of the another kind that Fig. 3 provides for the embodiment of the present invention based on Single Frequency Network;
Fig. 4 is for switching schematic diagram in a kind of community based on Single Frequency Network that the embodiment of the present invention provides;
Schematic diagram is switched in the community of the another kind that Fig. 5 provides for the embodiment of the present invention based on Single Frequency Network;
The structural representation of a kind of community switching device shifter based on Single Frequency Network that Fig. 6 provides for the embodiment of the present invention;
The structural representation of a kind of community switched system based on Single Frequency Network that Fig. 7 provides for the embodiment of the present invention.
Embodiment
For the ease of understanding, the embodiment of the present invention, before discussing cell switching method, device and the system based on Single Frequency Network in detail, first describes existing Single Frequency Network.Refer to Fig. 1, Fig. 1 is existing a kind of Single Frequency Network structural representation.As shown in Figure 1, several communities such as (for example 3,4,7) can form a region bunch, can have the mobile terminals such as mobile phone, travelling carriage, palmtop PC in each community; Wherein, between the base station of each community and central control unit, be connected by optical fiber, central control equipment is for controlling base station, and for example, central control equipment can be controlled base station and send broadcast, control signal etc.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 2, the schematic flow sheet of a kind of cell switching method based on Single Frequency Network that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the cell switching method based on Single Frequency Network that the embodiment of the present invention provides can comprise the following steps:
The signal to noise ratio (Signal to Noise Ratio, SNR) of the same mobile terminal that 201, at least two base stations of reception report;
In the embodiment of the present invention, can be received by central control equipment the SNR of the same mobile terminal that at least two base stations report.
In Single Frequency Network, mobile terminal can send to the base station of its community, place base station requests access message, and on the communication time slot distributing uploading data.
Wherein, for same mobile terminal, the base station requests message of its transmission, except being arrived by the base station monitors of its community, place, can also be arrived by the base station monitors of neighbor cell.
Wherein, for same mobile terminal, its data of uploading on the communication time slot distributing, except received the row decoding processing of going forward side by side by the base station of its community, place, can also be received the row decoding processing of going forward side by side by the base station of neighbor cell.
Therefore, as an execution mode alternatively, the SNR of the above-mentioned same mobile terminal that central control equipment receives can be obtained by the network insertion request message of monitoring same mobile terminal transmission by least two base stations, and reports to central control equipment;
Or the data acquisition that the SNR of the above-mentioned same mobile terminal that central control equipment receives can be sent by the same mobile terminal of decoding by least two base stations also reports to central control equipment.
The SNR of the same mobile terminal 202, at least two above-mentioned base stations being reported arranges according to size order, and chooses base station that maximum S/N R the is corresponding target BS as mobile terminal;
In the embodiment of the present invention, central control equipment is after receiving the SNR of the same mobile terminal that each base station reports, the SNR of the same mobile terminal that each base station can be reported arranges according to size order, and chooses base station that maximum S/N R the is corresponding target BS as mobile terminal.
As an optional execution mode, central control equipment, after selecting maximum S/N R, can first judge whether the maximum S/N R choosing is greater than default threshold value, if so, chooses base station that maximum S/N R the is corresponding target BS as mobile terminal; If not, the current community switching condition that do not meet of mobile terminal is described, should finishes flow process of the present invention.
For instance, suppose that the default threshold value of central control equipment is 4dB, the SNR that 4 base stations report to the same mobile terminal of central control equipment is arranged as SNR=-1dB according to size order, SNR=2dB, SNR=4dB, SNR=6dB, central control equipment is after selecting SNR=6dB, the SNR=6dB that discovery selects is greater than default threshold value 4dB, and central control equipment can be chosen base station that SNR=6dB the is corresponding target BS as mobile terminal.
In the embodiment of the present invention, central control equipment is after selecting maximum S/N R, whether the maximum S/N R that first judgement is chosen is greater than default threshold value, if, choose base station that maximum S/N R the is corresponding target BS as mobile terminal, if not, the current community switching condition that do not meet of mobile terminal is described, should finishes flow process of the present invention.In this way, only, in the time that maximum S/N R is greater than default threshold value, central control equipment just starts the community switching of mobile terminal, thereby can reduce the community switching that starts continually mobile terminal, reduces network resources waste.
203, be distributed in corresponding communication time slot in the community that target BS covers to mobile terminal;
As an optional execution mode, central control equipment is after selecting base station that maximum S/N R the is corresponding target BS as mobile terminal, if there is idle communication time slot in the community that discovery current goal base station covers, the idle communication time slot in the community that central control equipment can cover target BS be distributed to mobile terminal.
Or, as an optional execution mode, central control equipment is after selecting base station that maximum S/N R the is corresponding target BS as mobile terminal, if if the mobile terminal in the community that the communication time slot in the community that discovery current goal base station covers has been covered by target BS takies, the step-length of the community that central control equipment can cover distance objective base station be that the idle communication time slot of a neighbor cell is distributed to mobile terminal.
Wherein, above-mentioned step-length is that the idle communication time slot of a neighbor cell does not conflict mutually with the communication time slot of other neighbor cells of the community of target BS covering, prevents to disturb.
Or, as an optional execution mode, central control equipment is after selecting base station that maximum S/N R the is corresponding target BS as mobile terminal, if if the communication time slot in the community that discovery current goal base station covers is called by neighbor cell, notify the communication time slot in the community that release target BS covers, neighbor cell, and distribute to mobile terminal.
In Single Frequency Network, central control equipment is connected with each base station by optical fiber, be used for controlling each base station, central control equipment can judge in the community that any one base station covers whether have idle communication time slot, or whether communication time slot is called by neighbor cell, the embodiment of the present invention is not done detailed discussion herein.
In the embodiment of the present invention, central control equipment can upgrade network slot service condition table be distributed in communication time slot corresponding in the community of target BS covering to mobile terminal after.Wherein, above-mentioned network slot service condition table is for the corresponding relation between the mark ID of the mark (Identity, ID) of record move terminal, target BS and communication time slot that mobile terminal is assigned with.For instance, the mark ID of mobile terminal can be international mobile subscriber identity (International Mobile Subscriber Identification Number, IMSI) or the telephone number of mobile terminal; The mark ID of target BS can be base station number etc.
204, notify at least two above-mentioned base stations to send broadcast, wherein, this broadcast is at least carried the mark ID of mobile terminal, the mark ID of target BS and the communication time slot that mobile terminal is assigned with, make mobile terminal receive broadcast and after the mark ID that confirms the mobile terminal that self identification carries with broadcast is identical, switches to the community of target BS covering and use above-mentioned communication time slot uploading data.
As an optional execution mode, central control equipment be mobile terminal choose target BS, be distributed in target BS cover community in correspondence communication time slot after, can send a notification message to each base station, this notification message can carry the mark ID of mobile terminal, the ID of target BS and the communication time slot that mobile terminal is assigned with.
Wherein, for each base station, after receiving the notification message of central control equipment transmission, can send broadcast to the community of its covering, this broadcast is at least carried the mark ID of mobile terminal, the mark ID of target BS and the communication time slot that mobile terminal is assigned with.
Wherein, for mobile terminal, after receiving the broadcast of base station transmission, whether the mark ID of the mobile terminal that relatively self identification ID carries with broadcast is identical, if comparative result is identical, switches to the community of target BS covering and use above-mentioned communication time slot uploading data; Otherwise if comparative result is not identical, mobile terminal is not carried out cell handover operations.
In the cell switching method based on Single Frequency Network that the embodiment of the present invention provides, the SNR of the same mobile terminal that at least two base stations of central control equipment reception report, and choose base station that maximum S/N R the is corresponding target BS as mobile terminal, be distributed in communication time slot corresponding in the community of target BS covering to mobile terminal after, notify at least two base stations to send broadcast, make mobile terminal receive broadcast after the mark ID that confirms the mobile terminal that self identification ID carries with broadcast is identical, switch to the community of target BS covering and use above-mentioned communication time slot uploading data.The cell switching method based on Single Frequency Network that the embodiment of the present invention provides switches without realizing community in the situation of mobile terminal reporting radio link quality test report, reduces the loss of uplink resource.
Embodiment for a better understanding of the present invention, is elaborated below by specific embodiment.
Embodiment mono-:
Refer to Fig. 3, the schematic flow sheet of a kind of cell switching method based on Single Frequency Network that Fig. 3 provides for the present embodiment one.As shown in Figure 3, the method can comprise the following steps:
301, central control equipment receives the SNR of the same mobile terminal that each base station reports;
Wherein, the SNR of the above-mentioned same mobile terminal that central control equipment receives can be obtained by the network insertion request message of monitoring same mobile terminal transmission by each base station, and reports to central control equipment; Or, the data acquisition that can be sent by the same mobile terminal of decoding by each base station, and report to central control equipment.
The SNR of the same mobile terminal that 302, central control equipment reports above-mentioned each base station arranges according to size order;
303, central control equipment is chosen base station that maximum S/N R the is corresponding target BS as mobile terminal;
304, central control equipment judges that whether the community that target BS covers exists idle communication time slot, if not, performs step 305; If so, the idle communication time slot in the community target BS being covered is distributed to mobile terminal, and performs step 308;
305, central control equipment judges that the mobile terminal in the community whether communication time slot of community that target BS covers covered by target BS takies, and if so, performs step 306; If not, call the neighbor cell that the community that the communication time slot of community that target BS covers covered by target BS is described, central control equipment need to be regained invoked communication time slot in the community that target BS covers, and distributes to mobile terminal, and then execution step 308;
Wherein, after call the neighbor cell of the community that the communication time slot of central control equipment in the community of judging target BS covering covered by target BS, the neighbor cell of the community can notification target base station covering discharges the communication time slot of the community that target BS covers, and the communication time slot of the community that the target BS of release is covered is redistributed to mobile terminal.
306, central control equipment judges whether that the step-length of the community that has the covering of distance objective base station is the idle communication time slot of a neighbor cell, if so, performs step 307; If not, refuse mobile terminal and carry out community switching, finish flow process of the present invention;
307, to call the step-length of community that distance objective base station covers be the idle communication time slot of a neighbor cell to central control equipment, and distribute to mobile terminal;
Wherein, central control equipment is after the step-length of judging the community that has the covering of distance objective base station is the idle communication time slot of a neighbor cell, central control equipment can notify the neighbor cell that this free time communication time slot is corresponding to stop using this free time communication time slot, and this free time communication time slot is distributed to mobile terminal, thereby the step-length that realizes the community of calling the covering of distance objective base station is the idle communication time slot of a neighbor cell, and distributes to mobile terminal.
308, central control equipment notifies each base station to send broadcast, wherein, this broadcast is at least carried the mark ID of mobile terminal, the mark ID of target BS and the communication time slot that mobile terminal is assigned with, make mobile terminal receive broadcast and after the mark ID that confirms the mobile terminal that self identification carries with broadcast is identical, switches to the community of target BS covering and use above-mentioned communication time slot uploading data;
Wherein, for mobile terminal, after receiving the broadcast of base station transmission, whether the mark ID of the mobile terminal that relatively self identification ID carries with broadcast is identical, if comparative result is identical, switches to the community of target BS covering and use above-mentioned communication time slot uploading data; Otherwise if comparative result is not identical, mobile terminal is not carried out cell handover operations.
309, central control equipment upgrades network slot service condition table.
Wherein, central control equipment can upgrade network slot service condition table be distributed in communication time slot corresponding in the community of target BS covering to mobile terminal after.Above-mentioned network slot service condition table is for the corresponding relation between the mark ID of the mark ID of record move terminal, target BS and communication time slot that mobile terminal is assigned with.
It should be noted that between above-mentioned steps 308 and step 309, there is no the restriction of sequencing.
Embodiment bis-:
Refer to Fig. 4, Fig. 4 is for switching schematic diagram in a kind of community based on Single Frequency Network providing in the present embodiment two.As shown in Figure 4, alphabetical A, B, C, D, E, F, G, H, I, the J marking on each community represents respectively the label (or Base Station Identification) of each community, and wherein, the numeral 1～7 marking is expressed as the communication time slot that each community is distributed.As shown in Figure 4,7 neighbor cell A, B, C, D, E, F, G, region bunch of formation, and copy all single frequency network areas of seamless coverage with this.
Wherein, Single Frequency Network adopts time division multiplexing (Time Division Multiplexer, TDM) technology, and the communication time slot in Single Frequency Network is distributed, and reduces to reach the co-channel interference object producing with time slot communication between each community.Adopt after TDM technology, the community in adjacent region bunch with same communication time slot is geographically at a distance of enough far, can effectively reduce these communities co-channel interference of bringing of simultaneously communicating by letter.
As shown in Figure 4, suppose in each community and all have a mobile terminal, the communication time slot of each community all distributes.In embodiment bis-, suppose that the mobile terminal that is positioned at A district moves to D district, describes the cell switching method based on Single Frequency Network providing in the embodiment of the present invention below in conjunction with Fig. 4:
The first step, mobile terminal send access request message to base station, A district by access slot in A district, and distribute the communication time slot 1 that obtains A district; Mobile terminal passes through communication time slot 1 to A district base-station transmission data;
The data that transmit by communication time slot 1 mobile terminal second step, base station, A district are carried out decoding processing, obtain the SNR of mobile terminal, and report central control equipment; Simultaneously, base station, B district, base station, C district, base station, D district, base station, E district, base station, F district, base station, G district also can receive the data of the mobile terminal transmission in A district, and carry out respectively decoding processing and the SNR of this mobile terminal obtaining is reported to central control equipment, so that the SNR of the same mobile terminal that central control equipment reports according to base station, base station～G district of A district carries out cell switch determining;
The SNR of the same mobile terminal that the 3rd step, central control equipment report base station, base station～G district of A district sorts according to size order, and the signal energy that the SNR of the same mobile terminal that central control equipment can report according to base station, base station～G district of A district draws out the received same mobile terminal in base station, base station～G district of A district changes tendency; After sequence, central control equipment is found, the SNR maximum of the mobile terminal that base station, D district reports, and maximum S/N R is greater than default threshold value, CCC makes mobile terminal community handover decisions, discharge the communication time slot 1 in mobile terminal shared A district before switching, upgrade network slot resource service condition table, to change broadcasted content next time;
The 4th step, central control equipment are chosen the target BS of base station, D district as the mobile terminal in A district, the communication time slot 4 that central control equipment is judged current D district is occupied by the mobile terminal in D district, and the step-length that central control equipment calls distance B district is the free timeslot resource of a neighbor cell A, C, H, I, J, E; And only have the available free communication time slot 1 in A district that just discharges service in neighbor cell A, C, H, I, J, E, and therefore central control equipment distributes new communication time slot 1 to the mobile terminal in A district, and target BS is base station, D district.
The 5th step, central control equipment upgrade broadcasted content, notify each base station to send broadcast, wherein, this broadcast is at least carried the communication time slot 1 that the mobile terminal in mark ID and the A district of mark ID, base station, D district of the mobile terminal in A district is assigned with, make mobile terminal in A district receive broadcast and after the mark ID that confirms the mobile terminal that self identification carries with broadcast is identical, switch to D district and use above-mentioned communication time slot 1 uploading data, complete community and switch.Wherein, base station, D district can receive the uploading data from the mobile terminal in D district by communication time slot 1 and communication time slot 4.
Wherein, " 0 " after the switching shown in Fig. 4 in A district represents that the communication time slot 1 in A district is called, that is to say that switching rear A district does not exist communication time slot 1.
Embodiment tri-:
Refer to Fig. 5, Fig. 5 is for switching schematic diagram in the another kind that provides in the present embodiment three community based on Single Frequency Network.As shown in Figure 5, alphabetical A, B, C, D, E, F, G, H, I, the J marking on each community represents respectively the label (or Base Station Identification) of each community, and wherein, the numeral 1～4 marking is expressed as the communication time slot that each community is distributed.As shown in Figure 4,4 neighbor cell A, B, F, G form a region bunch, and copy all single frequency network areas of seamless coverage with this.
Wherein, Single Frequency Network adopts TDM technology, and the communication time slot in Single Frequency Network is distributed, and reduces to reach the co-channel interference object producing with time slot communication between each community.Adopt after TDM technology, the community in adjacent region bunch with same communication time slot is geographically at a distance of enough far, can effectively reduce these communities co-channel interference of bringing of simultaneously communicating by letter.
As shown in Figure 5, suppose in each community and all have a mobile terminal, the communication time slot of each community all distributes.In embodiment tri-, suppose that the mobile terminal that is positioned at A district moves to D district, describes the cell switching method based on Single Frequency Network providing in the embodiment of the present invention below in conjunction with Fig. 5:
The first step, mobile terminal send access request message to base station, A district by access slot in A district, and distribute the communication time slot 2 that obtains A district; Mobile terminal passes through communication time slot 2 to A district base-station transmission data;
The data that transmit by communication time slot 2 mobile terminal second step, base station, A district are carried out decoding processing, obtain the SNR of mobile terminal, and report central control equipment; Simultaneously, base station, B district, base station, C district, base station, D district, base station, E district, base station, F district, base station, G district also can receive the data of the mobile terminal transmission in A district, and carry out respectively decoding processing and the SNR of this mobile terminal obtaining is reported to central control equipment, so that the SNR of the same mobile terminal that central control equipment reports according to base station, base station～G district of A district carries out cell switch determining;
The SNR of the same mobile terminal that the 3rd step, central control equipment report base station, base station～G district of A district sorts according to size order, and the signal energy that the SNR of the same mobile terminal that central control equipment can report according to base station, base station～G district of A district draws out the received same mobile terminal in base station, base station～G district of A district changes tendency; After sequence, central control equipment is found, the SNR maximum of the mobile terminal that base station, D district reports, and maximum S/N R is greater than default threshold value, CCC makes mobile terminal community handover decisions, discharge the communication time slot 2 in mobile terminal shared A district before switching, upgrade network slot resource service condition table, to change broadcasted content next time;
The 4th step, central control equipment are chosen the target BS of base station, D district as the mobile terminal in A district, the communication time slot 3 that central control equipment is judged current D district is occupied by the mobile terminal in D district, and the step-length that central control equipment calls distance B district is the free timeslot resource of a neighbor cell A, C, H, I, J, E; And only has the available free communication time slot 2 in A district that just discharges service in neighbor cell A, C, H, I, J, E, if but central control equipment distributes new communication time slot 2 to the mobile terminal in A district, to produce and conflict with the communication time slot of neighbor cell I, therefore central control equipment be refused to this mobile terminal allocate communications time slot;
Therefore, the cell switching method based on Single Frequency Network providing in order to realize the embodiment of the present invention, when the idle communication time slot that central control equipment is a neighbor cell in the step-length of the community that distance objective base station is covered is distributed to mobile terminal, above-mentioned step-length is that the idle communication time slot of a neighbor cell does not conflict with the communication time slot of other neighbor cells of the community of target BS covering mutually with order, prevents to disturb.
The 5th step, central control equipment upgrade broadcasted content, notify each base station to send broadcast, by the distribution condition notice mobile terminal of communication time slot, target BS; Mobile terminal is receiving after broadcast, if find not have the communication time slot of coupling and self identification, stops carrying out community and switches, and stops transmitting data.
Wherein, base station, A district can retain the ownership of communication time slot 2 and wait for that new mobile terminal enters Huo Wei neighbor cell, A district and calls, base station, the D district data that original mobile terminal is uploaded in communication time slot 3 continues to receive from D district.
Wherein, after the switching shown in Fig. 5, " 0 " in A district represents that A district does not exist communication time slot 2.
In the cell switching method based on Single Frequency Network that the embodiment of the present invention provides, central control equipment receives the SNR of the same mobile terminal that each base station reports, and choose base station that maximum S/N R the is corresponding target BS as mobile terminal, be distributed in communication time slot corresponding in the community of target BS covering to mobile terminal after, notify each base station to send broadcast, make mobile terminal receive broadcast after the mark ID that confirms the mobile terminal that self identification ID carries with broadcast is identical, switch to the community of target BS covering and use above-mentioned communication time slot uploading data.The cell switching method based on Single Frequency Network that the embodiment of the present invention provides switches without realizing community in the situation of mobile terminal reporting radio link quality test report, reduces the loss of uplink resource.
Refer to Fig. 6, the structural representation of a kind of community switching device shifter based on Single Frequency Network that Fig. 6 provides for the embodiment of the present invention, this switching device shifter is for realizing the function of above-mentioned central control equipment.As shown in Figure 6, the community switching device shifter based on Single Frequency Network that the embodiment of the present invention provides can comprise:
Receiving element 601, for receiving the SNR of the same mobile terminal that at least two base stations report;
As an execution mode alternatively, the SNR of the above-mentioned same mobile terminal that receiving element 601 receives can be obtained by the network insertion request message of monitoring same mobile terminal transmission by least two base stations, and reports to receiving element 601; Or the data acquisition that the SNR of the above-mentioned same mobile terminal that receiving element 601 receives can be sent by the same mobile terminal of decoding by least two base stations also reports to receiving element 601.
Choose unit 602, the SNR of the same mobile terminal reporting at least two base stations that receiving element 601 is received arranges according to size order, and chooses base station that maximum S/N R the is corresponding target BS as mobile terminal;
As an optional execution mode, the SNR that chooses the same mobile terminal that unit specifically can report at least two base stations that receiving element 601 is received arranges according to size order, and in the time that maximum S/N R is greater than default threshold value, choose base station that maximum S/N R the is corresponding target BS as above-mentioned mobile terminal.In this way, only in the time that maximum S/N R is greater than default threshold value, choose unit 602 and just choose base station that maximum S/N R the is corresponding target BS as above-mentioned mobile terminal, thereby switch the community that starts mobile terminal, can reduce the community switching that starts continually mobile terminal, reduce network resources waste.
Allocation units 603, for being distributed in corresponding communication time slot in the community that target BS covers to above-mentioned mobile terminal;
As an optional execution mode, allocation units 603 specifically can, in the community covering in current goal base station while there is idle communication time slot, be distributed to mobile terminal by idle communication time slot.
As another optional execution mode, when mobile terminal in the community that allocation units 603 specifically can have been covered by target BS for the communication time slot in the community covering in current goal base station takies, the step-length of the community that distance objective base station is covered is that the idle communication time slot of a neighbor cell is distributed to mobile terminal.
Wherein, above-mentioned step-length is that the communication time slot of other neighbor cells of the community that covers of idle communication time slot and the target BS of a neighbor cell does not conflict mutually.
As another optional execution mode, when allocation units 603 specifically can be called by neighbor cell for the communication time slot in the community covering in current goal base station, communication time slot in the community that release target BS in notice neighbor cell covers, and distribute to mobile terminal.
Notification unit 604, send broadcast at least two base stations of notice, wherein, this broadcast is at least carried the mark ID of above-mentioned mobile terminal, the mark ID of target BS and the communication time slot that above-mentioned mobile terminal is assigned with, make above-mentioned mobile terminal receive broadcast and after the mark ID that confirms the mobile terminal that self identification carries with broadcast is identical, switches to the community of target BS covering and use above-mentioned communication time slot uploading data.
In the community switching device shifter based on Single Frequency Network that the embodiment of the present invention provides, receiving element 601 receives the SNR of the same mobile terminal that at least two base stations report, choose unit 602 and choose base station that maximum S/N R the is corresponding target BS as mobile terminal, allocation units 603 are distributed in communication time slot corresponding in the community of target BS covering to mobile terminal after, notification unit 604 notifies at least two base stations to send broadcast, make mobile terminal receive broadcast after the mark of confirming the mobile terminal that self identification carries with broadcast is identical, switch to the community of target BS covering and use above-mentioned communication time slot uploading data.The community switching device shifter based on Single Frequency Network that the embodiment of the present invention provides switches without realizing community in the situation of mobile terminal reporting radio link quality test report, reduces the loss of uplink resource.
Refer to Fig. 7, the structural representation of a kind of community switched system based on Single Frequency Network that Fig. 7 provides for the embodiment of the present invention.As shown in Figure 7, the community switched system based on Single Frequency Network that the embodiment of the present invention provides can comprise:
Community switching device shifter based on Single Frequency Network 701, at least two base stations 702 and mobile terminals 703;
Wherein, mobile terminal 703 can be mobile phone, travelling carriage, palmtop PC etc., and the dotted line between mobile terminal 703 and at least two base stations 702 represents wireless connections; Realization between at least two base stations 702 and the community switching device shifter 701 based on Single Frequency Network represents wired connection, such as optical fiber etc.
Wherein, community switching device shifter 701 based on Single Frequency Network, for receiving the SNR of the mobile terminal 703 that at least two base stations 702 report, the SNR of the mobile terminal 703 that at least two base stations 702 are reported arranges according to size order, and chooses the target BS of the base station that maximum S/N R is corresponding (i.e. some base stations at least two base stations 702) as mobile terminal 702; And give mobile terminal 703 be distributed in target BS cover community in correspondence communication time slot; Notify at least two base stations 702 to send broadcast, wherein, this broadcast is at least carried the mark ID of mobile terminal 703, the mark ID of target BS and the communication time slot that mobile terminal 703 is assigned with;
Wherein, at least two base stations 702 are for reporting community switching device shifter 701 by the SNR of mobile terminal 703, and send broadcast according to the notice of community switching device shifter 701, wherein, this broadcast is at least carried the mark ID of mobile terminal 703, the mark ID of target BS and the communication time slot that mobile terminal 703 is assigned with;
Wherein, the broadcast that mobile terminal 703 sends for receiving at least two base stations 702, and after the mark ID that confirms the mobile terminal 703 that self identification carries with broadcast is identical, switches to the community of target BS covering and use above-mentioned communication time slot uploading data.
Wherein, the network insertion request message that the SNR of mobile terminal 703 is sent by monitoring mobile terminal 703 by least two base stations 702 obtains, or the data acquisition being sent by decoding mobile terminal 703 by least two base stations 702.
In the embodiment of the present invention, the structure of the community switching device shifter 701 based on Single Frequency Network is identical with Fig. 6, and the embodiment of the present invention is not repeated herein.
In the community switched system based on Single Frequency Network that the embodiment of the present invention provides, received the SNR of the same mobile terminal 703 that at least two base stations 702 report by the community switching device shifter 701 based on Single Frequency Network, and choose base station that maximum S/N R the is corresponding target BS as mobile terminal 703, be distributed in communication time slot corresponding in the community of target BS covering to mobile terminal 703 after, notify at least two base stations 702 to send broadcast, make mobile terminal 703 receive broadcast and after the mark ID that confirms the mobile terminal 703 that self identification carries with broadcast is identical, switch to the community of target BS covering and use above-mentioned communication time slot uploading data.The community switched system based on Single Frequency Network that the embodiment of the present invention provides switches without realizing community in the situation of mobile terminal reporting radio link quality test report, reduces the loss of uplink resource.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: flash disk, read-only memory (Read-Only Memory, ROM), the various media that can be program code stored such as random access device (Random Access Memory, RAM), magnetic disc or CD.
Above a kind of cell switching method based on Single Frequency Network providing in the embodiment of the present invention and device, system are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (13)
1. the cell switching method based on Single Frequency Network, is characterized in that, comprising:
Receive the signal to noise ratio of the same mobile terminal that at least two base stations report;
The signal to noise ratio of the same mobile terminal that described at least two base stations are reported is arranged according to size order, and chooses the target BS of base station corresponding to maximum signal to noise ratio as described mobile terminal;
Be distributed in the communication time slot of correspondence in the community that described target BS covers to described mobile terminal;
Described in notice, at least two base stations send broadcast, described broadcast is at least carried the mark of the mark of described mobile terminal, described target BS and the communication time slot that described mobile terminal is assigned with, make described mobile terminal receive described broadcast and after the mark of confirming the mobile terminal that self identification carries with described broadcast is identical, switches to the community of described target BS covering and use described communication time slot uploading data;
The signal to noise ratio of described same mobile terminal is obtained by the network insertion request message of monitoring same mobile terminal transmission by described at least two base stations, or the data acquisition being sent by the same mobile terminal of decoding by described at least two base stations.
2. method according to claim 1, is characterized in that, described in choose base station corresponding to maximum signal to noise ratio and comprise as the target BS of described mobile terminal:
If maximum signal to noise ratio is greater than default threshold value, choose the target BS of base station corresponding to maximum signal to noise ratio as described mobile terminal.
3. cell switching method according to claim 1 and 2, is characterized in that, in the described community that is distributed in described target BS covering to described mobile terminal, corresponding communication time slot comprises:
If there is idle communication time slot in the community that current described target BS covers, the communication time slot of described free time distributed to described mobile terminal.
4. cell switching method according to claim 1 and 2, is characterized in that, in the described community that is distributed in described target BS covering to described mobile terminal, corresponding communication time slot comprises:
If the mobile terminal in the community that the communication time slot in the community that current described target BS covers has been covered by described target BS takies, the step-length of the community described distance target BS being covered is that the idle communication time slot of a neighbor cell is distributed to described mobile terminal.
5. cell switching method according to claim 4, is characterized in that, described step-length is that the idle communication time slot of a neighbor cell does not conflict mutually with the communication time slot of other neighbor cells of the community of described target BS covering.
6. cell switching method according to claim 1 and 2, is characterized in that, in the described community that is distributed in described target BS covering to described mobile terminal, corresponding communication time slot comprises:
If the communication time slot in the community that current described target BS covers is called by neighbor cell, notify described neighbor cell to discharge the communication time slot in the community that described target BS covers, and distribute to described mobile terminal.
7. the community switching device shifter based on Single Frequency Network, is characterized in that, comprising:
Receiving element, for receiving the signal to noise ratio of the same mobile terminal that at least two base stations report;
Choose unit, the signal to noise ratio of the same mobile terminal reporting for described at least two base stations that described receiving element is received is arranged according to size order, and chooses the target BS of base station corresponding to maximum signal to noise ratio as described mobile terminal;
Allocation units, for being distributed in corresponding communication time slot in the community that described target BS covers to described mobile terminal;
Notification unit, described in being used for notifying, at least two base stations send broadcast, described broadcast is at least carried the mark of the mark of described mobile terminal, described target BS and the communication time slot that described mobile terminal is assigned with, make described mobile terminal receive described broadcast and after the mark of confirming the mobile terminal that self identification carries with described broadcast is identical, switches to the community of described target BS covering and use described communication time slot uploading data;
The signal to noise ratio of described same mobile terminal is obtained by the network insertion request message of monitoring same mobile terminal transmission by described at least two base stations, or the data acquisition being sent by the same mobile terminal of decoding by described at least two base stations.
8. community according to claim 7 switching device shifter, is characterized in that,
The described unit of choosing, the signal to noise ratio of the same mobile terminal reporting specifically for described at least two base stations that described receiving element is received is arranged according to size order, and in the time that maximum signal to noise ratio is greater than default threshold value, choose the target BS of base station corresponding to maximum signal to noise ratio as described mobile terminal.
9. according to the community switching device shifter described in claim 7 or 8, it is characterized in that,
Described allocation units, when there is idle communication time slot in the community covering at current described target BS, distribute to described mobile terminal by the communication time slot of described free time.
10. according to the community switching device shifter described in claim 7 or 8, it is characterized in that,
Described allocation units, when mobile terminal in the community having been covered by described target BS specifically for the communication time slot in the community covering at current described target BS takies, the step-length of the community that described distance target BS is covered is that the idle communication time slot of a neighbor cell is distributed to described mobile terminal.
11. community according to claim 10 switching device shifters, is characterized in that, described step-length is that the idle communication time slot of a neighbor cell does not conflict mutually with the communication time slot of other neighbor cells of the community of described target BS covering.
12. according to the community switching device shifter described in claim 7 or 8, it is characterized in that,
Described allocation units, while being called, notify described neighbor cell to discharge the communication time slot in the community that described target BS covers, and distribute to described mobile terminal specifically for the communication time slot in the community covering at current described target BS by neighbor cell.
13. 1 kinds of community switched systems based on Single Frequency Network, is characterized in that, comprise the community switching device shifter described at least two base stations, mobile terminal and the claims 7～12 any one;
Described at least two base stations, for the signal to noise ratio of described mobile terminal is reported to described community switching device shifter, and sending broadcast according to the notice of described community switching device shifter, described broadcast is at least carried the mark of described mobile terminal, the mark of target BS and the communication time slot that described mobile terminal is assigned with;
Described mobile terminal, at least two broadcasts that base station sends described in being used for receiving, and after the mark of confirming the mobile terminal that self identification carries with described broadcast is identical, switches to the community of described target BS covering and use described communication time slot uploading data;
The signal to noise ratio of described mobile terminal is obtained by the network insertion request message of monitoring described mobile terminal transmission by described at least two base stations, or the data acquisition being sent by mobile terminal described in decoding by described at least two base stations.
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| CN109327869A (en) * | 2017-07-31 | 2019-02-12 | 中兴通讯股份有限公司 | Terminal network switching method, device, system and computer storage medium |
| CN112689256A (en) * | 2020-12-23 | 2021-04-20 | 云南兆讯科技有限责任公司 | Wireless communication system and method based on 2.4G or 433M and wireless body temperature acquisition system |
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| CN1080974C (en) * | 1994-05-11 | 2002-03-13 | 诺基亚电信公司 | Control of handover and transmission power control of mobile station in a mobile telecommunications system |
| CN1578482A (en) * | 2003-07-28 | 2005-02-09 | 中兴通讯股份有限公司 | Method for estimating cell in GSM complex network |
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| CN1080974C (en) * | 1994-05-11 | 2002-03-13 | 诺基亚电信公司 | Control of handover and transmission power control of mobile station in a mobile telecommunications system |
| CN1578482A (en) * | 2003-07-28 | 2005-02-09 | 中兴通讯股份有限公司 | Method for estimating cell in GSM complex network |
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