CN102065438A - Method and equipment for acquiring and networking frequency point sets - Google Patents
Method and equipment for acquiring and networking frequency point sets Download PDFInfo
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- CN102065438A CN102065438A CN2010106018443A CN201010601844A CN102065438A CN 102065438 A CN102065438 A CN 102065438A CN 2010106018443 A CN2010106018443 A CN 2010106018443A CN 201010601844 A CN201010601844 A CN 201010601844A CN 102065438 A CN102065438 A CN 102065438A
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Abstract
The invention discloses a method and equipment for acquiring and networking frequency point sets. The method comprises the following steps of: determining a frequency point set comprising a plurality of frequency points in a frequency range used by a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system; acquiring at least one frequency point set through carrying out frequency deviation on the frequency point set; and furthermore, networking on the basis of the acquired frequency point sets. The invention does not introduce any computational complexity on realization, and the same frequency interference level of the whole network is effectively reduced through reasonable carrier frequency deviation in a given frequency range; and furthermore, through the scheme that carrier frequencies in different sets are networked in adjacent cells and non-adjacent cells can be networked with the same frequency, the same frequency interference of service channels between cells can be effectively reduced on the premise of no increase of the expense of the equipment.
Description
Technical field
The present invention relates to wireless communication technology, the obtaining of particularly a kind of frequency set, network-building method and equipment.
Background technology
On algorithm principle, as TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, TD SDMA) distinctive joint-detection, intelligent antenna technology are used when good, TD-SCDMA system cell breath can alleviate greatly, it can think this moment no longer be interference-limited system, but the code channel limited systems.But practical application at present be it seems, because equipment, many reasons such as the network planning, joint-detection and smart antenna do not obtain the performance of expection, particularly in order to improve frequency spectrum resource utilization rate, the TD-SCDMA system has adopted identical networking, because the TD-SCDMA system base-station must operate on the identical frequency with the terminal transceiver, this causes neighbor cell common signal channel and Traffic Channel when overloading is used frequently will inevitably suffer serious co-channel interference, because the TD-SCDMA scrambler is shorter, so presence of intercell interference is serious with the white noise of constant power to the influence ratio of Radio Link.And then cause network capacity to reduce and coverage is shunk, the TD-SCDMA system is interference-limited system equally, thus must consider the elimination co-channel interference to the influence of system to improve network quality.
Also adopt identical carrier frequency emission if consider the neighbor cell common signal channel, then because the demodulation threshold that influences common signal channel of co-channel interference will lifting, terminal can not reliably be obtained broadcast message, and descending access performance worsens, and the coverage of sub-district will be difficult to guarantee.So during the network planning now all available carrier frequencies are divided into two classes, a class is a main carrier frequency, only at TS0 and DwPTS slot transmission common signal channel; Another kind of is assistant carrier frequency, and main transport service channel does not use TS0 and DwPTS time slot.Main carrier frequency and assistant carrier frequency are different frequent points.Terminal is at first finished access by main carrier frequency, and synchronous and open loop power control obtains the business carrier frequency position by FACH (Forward Access Channel, forward access channel) channel then and switches to the enterprising industry affair of assistant carrier frequency transmitting-receiving again.Neighbor cell main carrier frequency difference, guarantee that the terminal access is not influenced by adjacent sub-district co-channel interference, but a plurality of carrier frequency of neighbor cell belong to same frequency set during owing to the network planning at present, between the neighbor cell assistant carrier frequency, certainly exist co-channel interference between assistant carrier frequency and the main carrier frequency.
Fig. 1 is for being example identical networking schematic diagram with S666, Fig. 2 adopts TFFR (TD-SCDMA Fractional Frequency Reuse for the N frequency point cell, the TD-SCDMA channeling) technology identical networking exemplary plot, as shown in the figure, with outdoor utility 6 carrier frequency, 3 sector cells, promptly S666 is configured to example, and Fig. 1 provides typical clover website layout structure.The corresponding bold box enclosing region of A10 is A12 coverage, base station, sector that A11 indication zone is served for base station A12 or sub-district, in the sector (sub-district) of each A11 indication, the numeral of the font representation that A13 indication black is bigger is the main carrier frequency of respective cell, and the numeral that A14 indication black normal font is represented is the assistant carrier frequency of respective cell.
When Fig. 2 then provides S666 shown in Figure 1 configuration Huawei Company's suggestion utilize dynamic frequency multiplex technique TFFR networking plan example, the main carrier frequency while of N frequency also is the business carrier frequency of Cell Edge User, all the other N-1 assistant carrier frequency is served Cell Center User.Side algorithm Network Based is selected different assistant carrier frequencies for corresponding terminal again according to the terminal measurement result, has suppressed the co-channel interference on the Traffic Channel to a certain extent.
The deficiencies in the prior art are: dynamic frequency multiplex technique TFFR needs the base station to judge according to the channel status of terminal and the interference level of network which carrier frequency is this terminal should reside on, realize bringing bigger signaling consumption to system, moreover, increased the difficulty of planning during adjacent the arranging net of other vendor equipment that He Tongcheng does not adopt this technology.
Do not adopt the networking plan of TFFR technology then more can't avoid the influence of co-channel interference on the business carrier frequency.
Summary of the invention
Technical problem solved by the invention has been to provide the obtaining of a kind of frequency set, network-building method and equipment.In order to reduce the influence of co-channel interference on the business carrier frequency.。
A kind of acquisition methods of frequency set is provided in the embodiment of the invention, has comprised the steps:
In the frequency range of TD-SCDMA system applies, determine to comprise the frequency set of a plurality of frequencies;
Described frequency set is obtained at least one frequency set by deviation frequency.
Method based on the frequency set networking of obtaining is provided in the embodiment of the invention, has comprised the steps:
Different frequency set is used in each base station;
Same frequency set, the main carrier frequency frequency difference that each sector of each base station services is selected are used in the sector of each base station services;
Each sector of each base station services is different with the main carrier frequency of adjacent sub-district adjacent sectors.
Method based on the frequency set networking of obtaining is provided in the embodiment of the invention, has it is characterized in that, comprised the steps:
Different frequency set is used in the sector of each base station services;
Each sector of each base station services is different with the frequency set of adjacent sub-district adjacent sectors.
A kind of equipment that obtains of frequency set is provided in the embodiment of the invention, has comprised:
Frequency set determination module is used in the frequency range of TD-SCDMA system applies, determines to comprise the frequency set of a plurality of frequencies;
Offset module is used for described frequency set is obtained at least one frequency set by deviation frequency.
Communication network based on the frequency set of obtaining is provided in the embodiment of the invention, has comprised several base stations, wherein:
Different frequency set is used in each base station;
Same frequency set, the main carrier frequency frequency difference that each sector of each base station services is selected are used in the sector of each base station services;
Each sector of each base station services is different with the main carrier frequency of adjacent sub-district adjacent sectors.
Communication network based on the frequency set of obtaining is provided in the embodiment of the invention, has comprised several base stations, wherein:
Different frequency set is used in the sector of each base station services;
Each sector of each base station services is different with the frequency set of adjacent sub-district adjacent sectors.
Beneficial effect of the present invention is as follows:
The technical scheme that the embodiment of the invention provides is not introduced any computation complexity in realization, by rationally be offset the co-channel interference level that carrier frequency effectively reduces whole network in given frequency range.
Further, by adopting the carrier frequency networking in the different sets at neighbor cell, the scheme that non-conterminous sub-district can identical networking need not to increase the co-channel interference that effectively reduces the inter-cell traffic channel under the prerequisite of cost of device.
Description of drawings
Fig. 1 is for being example identical networking schematic diagram with S666 in the background technology;
Fig. 2 is that the N frequency point cell adopts TFFR technology identical networking exemplary plot in the background technology;
Fig. 3 is the acquisition methods implementing procedure schematic diagram of embodiment of the invention intermediate-frequeney point set;
Fig. 4 is the set of the frequency after a deviation frequency schematic diagram in the embodiment of the invention;
Fig. 5 is for gathering the method one implementing procedure schematic diagram of networking based on the frequency that obtains in the embodiment of the invention;
Fig. 6 is the networking schematic diagram of method one in the embodiment of the invention;
Fig. 7 is for gathering the method two implementing procedure schematic diagram of networking based on the frequency that obtains in the embodiment of the invention;
Fig. 8 is the networking schematic diagram of method two in the embodiment of the invention;
The adjacent schematic diagram of interference reduction effect frequently when Fig. 9 is offset for embodiment of the invention intermediate-frequeney point;
Figure 10 obtains the device structure schematic diagram for embodiment of the invention intermediate-frequeney point set;
Communication network one structural representation of Figure 11 for gathering based on the frequency that obtains in the embodiment of the invention;
Communication network two structural representations of Figure 12 for gathering based on the frequency that obtains in the embodiment of the invention.
Embodiment
A kind of overloading networking plan after the transmission bandwidth compression during TD-SCDMA system group network frequently that is applied to will be proposed in the embodiment of the invention.Obtain different available frequency set by suitable skew carrier frequency frequency, neighbor cell adopts the carrier frequency networking in the different sets, different frequency collection inter-frequency networking can also can be adopted by identical networking in the interlayer sub-district, need not to increase the co-channel interference that effectively reduces the inter-cell traffic channel under the prerequisite of cost of device.Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Adopted compression carrier frequency separation (Channel Spacing) thus the scheme that increases the useful carrier frequency number in the given bandwidth improves in the scheme of the availability of frequency spectrum, this scheme is owing to more adjacent the interference frequently of the asymmetric introducing of up-downgoing transmission bandwidth (Occupied Bandwidth) cause network performance to descend.
And then increase under the prerequisite when reducing asymmetric the transmission at interval the main carrier frequency signal to the influence of downlink capacity and covering by expansion main carrier frequency and assistant carrier frequency at the carrier frequency number.But these effort have only improved the co-channel interference of the common signal channel that transmits on main carrier frequency, and between the assistant carrier frequency of neighbor cell bearer service channels, the main carrier frequency of bearer service channels and the co-channel interference between the assistant carrier frequency still are not inhibited.
Fig. 3 is the acquisition methods implementing procedure schematic diagram of frequency set, has provided a kind of scheme of new reduction co-channel interference in the embodiment of the invention, distributes in the bandwidth all carrier frequency frequencies to obtain more than the combination of frequency of frequency number at present by suitable skew.As shown in the figure, in acquisition process, can comprise the steps:
Step 301, in the frequency range of TD-SCDMA system applies, determine to comprise the frequency set of a plurality of frequencies;
Step 302, the set of described frequency is obtained at least one frequency set by deviation frequency.
Describe as follows below with example:
With CCSA (China Communications Standards Association, CCSA) the 10MHZ frequency spectrum resource of 2015MHz-2025MHz is an example in Ding Yi the A frequency range (2010MHz-2025MHz), carrier frequency separation is 1.6MHz, keeps consistent with network application at present.Consider that present TD-SCDMA terminal carrier search step-length (Channel Raster) is 200KHz, so all frequencies are the integral multiple of 200KHz.
Obtaining available frequency set can be as follows:
At first, when deviation frequency, be offset to a direction.Concrete, guarantee that the consistency of frequency shift (FS) between the different frequent points set is necessary, promptly simultaneously to a direction skew, if not like this, frequency planning will be very chaotic, be difficult to obtain available frequency set.
Secondly, in the frequency set, the isolation strip is arranged between the adjacent carrier frequency.Concrete, needing certain isolation strip between the adjacent carrier frequency, the isolation strip is wide as far as possible under the condition that frequency band allows.
Further, the isolation strip can obtain by the compression transmission bandwidth.
Fig. 4 is the frequency set schematic diagram after the deviation frequency, and as shown in the figure, FS1, FS2 and FS3 are illustrated respectively in 3 available frequency set that the A frequency range obtains by skew.In Fig. 3 example, the isolation strip between the adjacent frequency is 200KHz.
Below the enforcement based on available frequency set networking is described.
Fig. 5 as shown in the figure, can comprise the steps: when networking for the method one implementing procedure schematic diagram based on the frequency set networking of obtaining
Step 501, frequency set is obtained a plurality of frequencies set by deviation frequency;
Different frequency set is used in step 502, each base station;
Same frequency set, the main carrier frequency frequency difference that each sector of each base station services is selected are used in the sector of step 503, each base station services;
Each sector of step 504, each base station services is different with the main carrier frequency of adjacent sub-district adjacent sectors.
Fig. 6 is the networking schematic diagram of method one, is that example describes with the S666 networking that obtains three frequencies set shown in Figure 4 by deviation frequency among the figure, and as shown in the figure, website is typical cloverleaf structure.A, B, C are the base station of serving 3 sub-districts, and the frequency points corresponding set is respectively FS1, FS2 and FS3 shown in Figure 4, and the identical networking mode is adopted in 3 sectors of each sub-district.
Among the figure, same frequency set is used in 3 sectors of each base station services, is the main carrier frequency frequency difference of selecting separately, and each sector is also different with the main carrier frequency of adjacent sub-district adjacent sectors simultaneously.When guaranteeing neighbor cell main carrier frequency alien frequencies, guaranteed that also assistant carrier frequency has the skew of 200KHz at least like this, with the 1.4MHz transmission bandwidth is example, co-channel interference can reduce 10 * log (1.4MHz/1.2MHz)=0.7dB between rough estimate FS1-FS2, the FS2-FS3, and co-channel interference can reduce 10 * log (1.4MHz/1MHz)=1.5dB between the FS1-FS3.With the S666 networking mode of Fig. 4 example, only consider neighbor cell, because the co-channel interference level that FS1 suffers has just alleviated 2 * 0.7+2 * 1.5=4.4dB at least.So in whole network because each can bring bigger KPI (Key Performance Indicator, Key Performance Indicator) to improve to reducing of disturbing frequently of neighbour.
Fig. 7 as shown in the figure, can comprise the steps: when networking for the method two implementing procedure schematic diagram based on the frequency set networking of obtaining
Different frequency set is used in the sector of step 701, each base station services;
Each sector of step 702, each base station services is different with the frequency set of adjacent sub-district adjacent sectors.
Fig. 8 is the networking schematic diagram of method two, is that example describes with the S666 networking that obtains three frequencies set shown in Figure 4 by deviation frequency among the figure, and as shown in the figure, website is typical cloverleaf structure.3 sectors of each base station services and adjacent sub-district adjacent sectors use different frequency set, and the frequency reuse of same sub-district is greater than 1 at this moment.Compare with the S666 networking mode of Fig. 6 example, if antenna beam ideal (front and back lobe ratio infinity), fan antenna metallic reflection foliation is thought (adjacent sector beam does not overlap), be example with the 1.4MHz transmission bandwidth equally, the co-channel interference level that FS1 suffers has just alleviated 3 * 0.7+3 * 1.5=6.6dB at least, further improves 2.2dB than networking mode shown in Figure 6.So in whole network because each can bring bigger KPI to improve to reducing of disturbing frequently of neighbour.
The adjacent schematic diagram of interference reduction effect frequently when Fig. 9 is offset for frequency, as shown in the figure, adjacent interference reduction schematic diagram frequently when Fig. 9 provides frequency and suitably is offset.Δ F is a carrier frequency separation, and σ is a frequency offset, also is the isolation strip width.Suppose that f0 disturbs carrier frequency, f0+ σ and f0+2 σ are disturbed carrier frequency, from interference example shown in Figure 9 as can be seen, the co-channel interference of coming self-interference carrier frequency f0 that on behalf of carrier frequency f0+ σ, the square frame that A50 points to receive, the co-channel interference of coming self-interference carrier frequency f0 that on behalf of carrier frequency f0+2 σ, the square frame that A51 points to receive.Every carrier frequency transmission bandwidth is Δ F-σ.
Based on same inventive concept, the equipment that obtains of a kind of frequency set also is provided in the embodiment of the invention, based on the communication network of the frequency set of obtaining, because the acquisition methods of these equipment principle of dealing with problems and a kind of frequency set, to gather the method for networking based on the frequency that obtains similar, therefore the enforcement of these equipment can repeat part and repeat no more referring to the enforcement of method.
Figure 10 obtains the device structure schematic diagram for frequency set, as shown in the figure, can comprise in the equipment:
Frequency set determination module 1001 is used in the frequency range of TD-SCDMA system applies, determines to comprise the frequency set of a plurality of frequencies;
Offset module 1002 is used for described frequency set is obtained at least one frequency set by deviation frequency.
In the enforcement, offset module can also be further used for when deviation frequency to a direction skew.
In the enforcement, frequency set determination module can also be further used in the frequency set of determining the isolation strip being arranged between the adjacent carrier frequency.
In the enforcement, frequency set determination module can also be further used for determining that the isolation strip in the frequency set obtains by the compression transmission bandwidth.
Figure 11 as shown in the figure, can comprise several base stations for communication network one structural representation based on the frequency set of obtaining in the communication network, wherein:
Different frequency set is used in each base station;
Same frequency set, the main carrier frequency frequency difference that each sector of each base station services is selected are used in the sector of each base station services;
Each sector of each base station services is different with the main carrier frequency of adjacent sub-district adjacent sectors.
Among the figure in order to example be to be that example describes with the S666 networking that obtains three frequencies set shown in Figure 4 by deviation frequency, website is typical cloverleaf structure.A, B, C are the base station of serving 3 sub-districts, and the frequency points corresponding set is respectively FS1, FS2 and FS3 shown in Figure 4, and the identical networking mode is adopted in 3 sectors of each sub-district.
Figure 12 as shown in the figure, can comprise several base stations for communication network two structural representations based on the frequency set of obtaining in the communication network, wherein:
Different frequency set is used in the sector of each base station services;
Each sector of each base station services is different with the frequency set of adjacent sub-district adjacent sectors.
Among the figure in order to example be to be that example describes with the S666 networking that obtains three frequencies set shown in Figure 4 by deviation frequency, website is typical cloverleaf structure.3 sectors of each base station services and adjacent sub-district adjacent sectors use different frequency set.
As seen from the above-described embodiment, in the embodiment of the invention, in the frequency range of TD-SCDMA system applies, obtain a plurality of frequency set by deviation frequency;
Further, use a plurality of frequency set the carrying out inter-frequency networkings that obtain at neighbor cell;
Concrete, when obtaining the frequency set, keep the thought of certain isolation strip at the transmission bandwidth cut-off frequency between the adjacent carrier frequency;
Can obtain the method for carrier frequency separation by the compression transmission bandwidth from band;
Reduced the TD-SCDMA co-channel interference by such scheme.
The technical scheme that the embodiment of the invention provides is not introduced any computation complexity in realization, by rationally be offset the co-channel interference level that carrier frequency effectively reduces whole network in given frequency range.By adopting the carrier frequency networking in the different sets at neighbor cell, the scheme that non-conterminous sub-district can identical networking need not to increase the co-channel interference that effectively reduces the inter-cell traffic channel under the prerequisite of cost of device.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
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 acquisition methods of a frequency set is characterized in that, comprises the steps:
In the frequency range of TD-SCDMA system applies, determine to comprise the frequency set of a plurality of frequencies;
Described frequency set is obtained at least one frequency set by deviation frequency.
2. the method for claim 1 is characterized in that, is offset to a direction when deviation frequency.
3. method as claimed in claim 1 or 2 is characterized in that, in the frequency set, the isolation strip is arranged between the adjacent carrier frequency.
4. method as claimed in claim 3 is characterized in that, the isolation strip obtains by the compression transmission bandwidth.
5. based on the method for the frequency set networking of obtaining as described in arbitrary as claim 1 to 4, it is characterized in that, comprise the steps:
Different frequency set is used in each base station;
Same frequency set, the main carrier frequency frequency difference that each sector of each base station services is selected are used in the sector of each base station services;
Each sector of each base station services is different with the main carrier frequency of adjacent sub-district adjacent sectors.
6. based on the method for the frequency set networking of obtaining as described in arbitrary as claim 1 to 4, it is characterized in that, comprise the steps:
Different frequency set is used in the sector of each base station services;
Each sector of each base station services is different with the frequency set of adjacent sub-district adjacent sectors.
7. the equipment that obtains of a frequency set is characterized in that, comprising:
Frequency set determination module is used in the frequency range of TD-SCDMA system applies, determines to comprise the frequency set of a plurality of frequencies;
Offset module is used for described frequency set is obtained at least one frequency set by deviation frequency.
8. equipment as claimed in claim 7 is characterized in that, offset module is further used for when deviation frequency to a direction skew.
9. as claim 7 or 8 described equipment, it is characterized in that frequency set determination module is further used in the frequency set of determining the isolation strip being arranged between the adjacent carrier frequency.
10. equipment as claimed in claim 9 is characterized in that, frequency set determination module is further used for determining that the isolation strip in the frequency set obtains by the compression transmission bandwidth.
11. the communication network based on the frequency set of obtaining as described in arbitrary as claim 1 to 4 is characterized in that, comprises several base stations, wherein:
Different frequency set is used in each base station;
Same frequency set, the main carrier frequency frequency difference that each sector of each base station services is selected are used in the sector of each base station services;
Each sector of each base station services is different with the main carrier frequency of adjacent sub-district adjacent sectors.
12. the communication network based on the frequency set of obtaining as described in arbitrary as claim 1 to 4 is characterized in that, comprises several base stations, wherein:
Different frequency set is used in the sector of each base station services;
Each sector of each base station services is different with the frequency set of adjacent sub-district adjacent sectors.
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| CN2010106018443A CN102065438A (en) | 2010-12-22 | 2010-12-22 | Method and equipment for acquiring and networking frequency point sets |
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| CN2010106018443A CN102065438A (en) | 2010-12-22 | 2010-12-22 | Method and equipment for acquiring and networking frequency point sets |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016150144A1 (en) * | 2015-03-23 | 2016-09-29 | 中兴通讯股份有限公司 | Inter-system same-frequency networking method and device |
| CN108616994A (en) * | 2018-05-11 | 2018-10-02 | 东南大学 | A kind of method for channel allocation suitable for multifrequency point Internet of things system |
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| CN101014156A (en) * | 2007-01-22 | 2007-08-08 | 协同智迅通信技术（深圳）有限公司 | Digital cluster communication method with the control channel frequency hopping function |
| CN101815300A (en) * | 2009-02-24 | 2010-08-25 | 大唐移动通信设备有限公司 | Cell frequency assignment method and device in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101014156A (en) * | 2007-01-22 | 2007-08-08 | 协同智迅通信技术（深圳）有限公司 | Digital cluster communication method with the control channel frequency hopping function |
| CN101815300A (en) * | 2009-02-24 | 2010-08-25 | 大唐移动通信设备有限公司 | Cell frequency assignment method and device in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016150144A1 (en) * | 2015-03-23 | 2016-09-29 | 中兴通讯股份有限公司 | Inter-system same-frequency networking method and device |
| CN108616994A (en) * | 2018-05-11 | 2018-10-02 | 东南大学 | A kind of method for channel allocation suitable for multifrequency point Internet of things system |
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Application publication date: 20110518 |