CN102883331A - Network coverage method, base station, network accessing method, and base station - Google Patents
Network coverage method, base station, network accessing method, and base station Download PDFInfo
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- CN102883331A CN102883331A CN2011101926278A CN201110192627A CN102883331A CN 102883331 A CN102883331 A CN 102883331A CN 2011101926278 A CN2011101926278 A CN 2011101926278A CN 201110192627 A CN201110192627 A CN 201110192627A CN 102883331 A CN102883331 A CN 102883331A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
Abstract
The embodiment of the invention provides a network coverage method, a base station, a network accessing method, and a base station; the network coverage method comprises the following steps: when performing network coverage, on the basis that a continuously covered first layer of network is established by using a differ-frequency networking scheme, and establishing a discontinuously covered second layer of same-frequency network by using frequency band which is different from each frequency band of the first layer of network, thereby improving the communication property of users at cell edge and meanwhile giving consideration to the handling capacity of whole network. The embodiment of the invention further provides a scheme for accessing the network which is formed by the above network coverage scheme.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to method, the base station of a kind of network coverage method, base station and access network.
Background technology
According to third generation partner program (third generation partnership project, 3GPP) agreement regulation, for 3G (Third Generation) Moblie technology (3rd-generation, 3G) and follow-up technical standard, Long Term Evolution (TD-SCDMA Long Term Evolution such as TD-SCDMA, TD-LTE) technology, the frequency duplex factor as one of network can be 1, be that network can be realized the whole network identical networking, utilize the identical networking technology can obtain the higher availability of frequency spectrum.But according to existing simulation result, behind the identical networking, because the impact of co-channel interference between each neighbor cell, at each cell edge, user's communication performance descends serious, causes thus the communication performance of whole network to be affected.
For the problem of co-channel interference that identical networking exists, prior art provides a kind of frequency shift channeling (Frequency Shifted Frequency Reuse, FSFR) networking plan.In the FSFR networking plan, can adopt frequency range division methods as shown in Figure 1, this frequency range is divided into partly overlapping each frequency sub-band, each frequency sub-band that utilizes any one frequency range division methods as shown in Figure 1 to mark off can form network as shown in Figure 2.
The subject matter of FSFR networking plan is, after the networking, be not fully with frequently in each neighbor cell edge, therefore the communication performance of comparing each Cell Edge User of identical networking scheme improves, but owing to still have frequency overlap in each neighbor cell edge, so that the problem that still exists adjacent cell frequencies to collide in each neighbor cell edge, the communication performance of each Cell Edge User still can not be guaranteed preferably.
Summary of the invention
The embodiment of the invention provides method, the base station of a kind of network coverage method, base station and access network, is used for solving the relatively poor problem of communication performance of each Cell Edge User of prior art.
A kind of network coverage method, the method comprises:
Determine mutually all non-overlapping at least three one-level frequency ranges, in treating any two neighbor cells of overlay area, use different one-level frequency ranges to cover, form the ground floor network of continuous covering in the described overlay area for the treatment of;
Determine and the equal non-overlapping secondary frequency range of described at least three one-level frequency ranges, in the first subregion of described at least one residential quarter for the treatment of the overlay area, use this secondary frequency range to cover, the the first subregion zero lap that uses this secondary frequency range to cover in described any two neighbor cells for the treatment of the overlay area forms the second layer network of discontinuous covering in the described overlay area for the treatment of.
A kind of base station, this base station comprises:
The first overlay module is used for determining mutually all non-overlapping at least three one-level frequency ranges, uses different one-level frequency ranges to cover in treating any two neighbor cells of overlay area, forms the ground floor network of continuous covering in the described overlay area for the treatment of;
The second overlay module, be used for to determine and the equal non-overlapping secondary frequency range of described at least three one-level frequency ranges, in the first subregion of described at least one residential quarter for the treatment of the overlay area, use this secondary frequency range to cover, the the first subregion zero lap that uses this secondary frequency range to cover in described any two neighbor cells for the treatment of the overlay area forms the second layer network of discontinuous covering in the described overlay area for the treatment of.
A kind of method of access network, the method comprises:
The access request that receiving terminal is initiated;
When this terminal only is positioned at the ground floor network coverage regional, with this terminal access ground floor network, when this terminal is positioned at ground floor network and common cover regional of any non-ground floor network of one deck, this terminal is accessed non-ground floor network in the common overlay area, when this terminal is positioned at common cover regional of three-layer network at least, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
A kind of base station, this base station comprises:
Receiver module is used for the access request that receiving terminal is initiated;
Access module, be used for when this terminal only is positioned at the ground floor network coverage regional, with this terminal access ground floor network, when this terminal is positioned at ground floor network and common cover regional of any non-ground floor network of one deck, this terminal is accessed non-ground floor network in the common overlay area, when this terminal is positioned at common cover regional of three-layer network at least, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
The scheme that provides according to the embodiment of the invention, when carrying out the network coverage, make up in the mode of utilizing inter-frequency networking on the basis of ground floor network of continuous covering, utilize with each frequency range of ground floor network all not identical frequency range make up the second layer common-frequency network of discontinuous covering, thereby in the communication performance that promotes Cell Edge User, can also take into account the throughput of the whole network.The embodiment of the invention also provides a kind of access to utilize the scheme of the network of above network coverage scheme composition.
Description of drawings
Fig. 1 is the frequency range division methods schematic diagram in the FSFR networking plan in the prior art;
Fig. 2 is the network diagram of utilizing the FSFR networking plan to form in the prior art;
The flow chart of steps of a kind of network coverage method that Fig. 3 provides for the embodiment of the invention one;
The communication system frequency range dividing mode schematic diagram that Fig. 4 (a) provides for the embodiment of the invention one;
The communication system frequency range dividing mode schematic diagram that Fig. 4 (b) provides for the embodiment of the invention one;
The structural representation of the base station that Fig. 5 provides for the embodiment of the invention two;
Fig. 6 covers schematic diagram for the base station network that the embodiment of the invention two provides;
The base station working method schematic diagram that Fig. 7 (a) provides for the embodiment of the invention two;
The base station working method schematic diagram that Fig. 7 (b) provides for the embodiment of the invention two;
The flow chart of steps of the method for a kind of access network that Fig. 8 provides for the embodiment of the invention three;
The structural representation of the base station that Fig. 9 provides for the embodiment of the invention four.
Embodiment
In order to solve TD-LTE system problem of co-channel interference in the networking process, promote the Cell Edge User communication performance, guarantee the communication performance of whole network, the embodiment of the invention provides a kind of Hierarchical Network network strategy based on the concentric circles framework, utilize the mode of common-frequency network of the discontinuous covering of all standing network building-out of inter-frequency networking, in the communication performance that promotes Cell Edge User, take into account the throughput of the whole network, simultaneously, the scheme of utilizing the embodiment of the invention to provide can also guarantee that the realization of engineering networking is simple.
Below in conjunction with each embodiment and accompanying drawing technical solution of the present invention is described.
Embodiment one,
The embodiment of the invention one provides a kind of network coverage method, is illustrated in figure 3 as the flow chart of steps of the method, comprising:
This step specifically comprises: use different one-level frequency ranges to cover in treating any two neighbor cells of overlay area, form the ground floor network of continuous covering in the described overlay area for the treatment of.
This step specifically comprises: use this secondary frequency range to cover in the first subregion of described at least one residential quarter for the treatment of the overlay area, the the first subregion zero lap that uses this secondary frequency range to cover in described any two neighbor cells for the treatment of the overlay area forms the second layer network of discontinuous covering in the described overlay area for the treatment of.
On the basis that forms second layer network, treat the throughput of overlay area in order further to improve, can treat that the overlay area further covers the 3rd layer, the 4th layer ... the N layer network:
The frequency range of determining and having determined is a non-overlapping m level frequency range all, in the m-1 subregion of described at least one residential quarter for the treatment of the overlay area, use this m level frequency range to cover, the m-1 subregion zero lap that described any two neighbor cells for the treatment of the overlay area use this m level frequency range to cover forms the m layer network of discontinuous covering in the described overlay area for the treatment of.
For each residential quarter, the zone of any one deck network coverage in the 2nd～N layer network can be fully overlapping, also can be partly overlapping, also can be fully nonoverlapping.
In the present embodiment, except covering, treats the overlay area ground floor complete network, treat in the overlay area, the 2nd～N layer network is the network of discontinuous covering, can determine by the following method the described area for the treatment of the subregion that the n layer network covers in i residential quarter, overlay area, described n is the positive integer greater than 1:
Wherein:
It is the area of overlay area of the 1st layer network of i residential quarter;
T
iIt is the total throughout of i residential quarter;
I
iBe i the co-channel interference that the residential quarter is subject to;
α, beta, gamma are the coefficient factor, are used for adjusting correlative factor for the impact of overlay area.
For fear of the co-channel interference between the same layer network (any layer network in the 2nd～N layer network) of neighbor cell, zero lap between the zone of this same layer network coverage of use in any two neighbor cells.More excellent, for each residential quarter, the center that is centered close to this residential quarter in the zone of any one deck network coverage in the 2nd～N layer network can be set, thereby further reduce the possibility that produces co-channel interference between the neighbor cell.
In the present embodiment, can be to determine from the communication system frequency range of dividing in advance for the frequency range of carrying out each layer network covering.Take treat the overlay area can with the communication system frequency range as 2570～2620MHz as example, this communication system frequency range can be divided into four frequency ranges and be used for follow-up therefrom determine one-level frequency range (3) and secondary frequency range (1), four frequency ranges that mark off can be respectively with frequency f1, f2, f3, f4 identifies, and is concrete, can carry out frequency range by following dual mode and divide:
First kind of way,
Shown in Fig. 4 (a); respectively reserve the protection interval of 5MHz at communication system frequency range 2570～2620MHz two ends to be divided; 2575～2615MHz evenly is divided into 4 frequency ranges (also can inhomogeneously dividing), and after the division, the frequency range of each frequency sign is 10MHz.Follow-up can be with frequency f1, f2, the frequency range of f3 sign is as the one-level frequency range, with the frequency range of frequency f4 sign as the secondary frequency range.
The second way,
Shown in Fig. 4 (b), communication system frequency range 2570～2620MHz to be divided is divided into 4 frequency ranges (also can evenly divide), after the division, frequency f1, f2, the frequency range of f3 sign is 10MHz, and the frequency range of frequency f4 sign is 20MHz.Follow-up can be with frequency f1, f2, the frequency range of f3 sign is as the one-level frequency range, with the frequency range of frequency f4 sign as the secondary frequency range.
In above two kinds of communication system frequency range dividing mode, the first dividing mode has been reserved the protection bandwidth with other system, and the second way is stronger to the antijamming capability of neighbour's frequency system relatively, but total throughout is lower; The communication system frequency range that the second way is divided is 50MHz, and with respect to first kind of way, total throughout is high, but relatively poor to the antijamming capability of neighbour's frequency system.
The scheme that the embodiment of the invention one provides is at the problem of co-channel interference that has solved Cell Edge User, when having promoted the communication performance of Cell Edge User, because each cell edge only has the alien frequencies network coverage, therefore the user is when access network, can automatically reside in the network of alien frequencies, save the link that base station side is judged, the time that can save user access network.The scheme that the embodiment of the invention one provides can also guarantee the total throughout of residential quarter, has simultaneously the simple advantage of realization.
Embodiment two,
With the embodiment of the invention one based on same inventive concept, the embodiment of the invention two provides a kind of base station, is illustrated in figure 5 as the structural representation of this base station, comprises the first overlay module 11 and the second overlay module 12, wherein:
The first overlay module 11 is used for determining mutually all non-overlapping at least three one-level frequency ranges, uses different one-level frequency ranges to cover in treating any two neighbor cells of overlay area, forms the ground floor network of continuous covering in the described overlay area for the treatment of; The second overlay module 12 is used for determining and the equal non-overlapping secondary frequency range of described at least three one-level frequency ranges, in the first subregion of described at least one residential quarter for the treatment of the overlay area, use this secondary frequency range to cover, the the first subregion zero lap that uses this secondary frequency range to cover in described any two neighbor cells for the treatment of the overlay area forms the second layer network of discontinuous covering in the described overlay area for the treatment of.
This base station also comprises the m overlay module, m=3, and 4......M identifies with 13,14......1M respectively:
The m overlay module, be used for all non-overlapping m level frequency ranges of definite frequency range with having determined, in the m-1 subregion of described at least one residential quarter for the treatment of the overlay area, use this m level frequency range to cover, the m-1 subregion zero lap that described any two neighbor cells for the treatment of the overlay area use this m level frequency range to cover forms the m layer network of discontinuous covering in the described overlay area for the treatment of.
N overlay module in the base station, concrete being used for determined the described area for the treatment of the subregion that i residential quarter, overlay area n layer network covers by the following method, described n is the positive integer greater than 1:
Wherein:
It is the area of overlay area of the n layer network of i residential quarter;
It is the area of overlay area of the 1st layer network of i residential quarter;
T
iIt is the total throughout of i residential quarter;
I
iBe i the co-channel interference that the residential quarter is subject to;
α, beta, gamma are the coefficient factor, are used for adjusting correlative factor for the impact of overlay area.
In the present embodiment, the base station can adopt directional antenna to carry out the network coverage, to form two-tier network as example, as shown in Figure 6, each base station can be used for realizing the network coverage of three residential quarters, supposes that three residential quarters corresponding to each base station utilize respectively frequency f1, f2, the different frequency range that f3 is corresponding is carried out the ground floor network coverage, utilizes frequency range corresponding to frequency f4 to carry out the second layer network coverage.The intensity of f1, f2, three frequency signals of f3 can be determined according to the network actual conditions in each base station, form the ground floor network coverage in each residential quarter that utilizes this base station to carry out in three residential quarters of the network coverage, and can be according to the signal of existing frequency range situation emission f4 frequency, guarantee that this signal strength signal intensity will be lower than the intensity of the used frequency of each residential quarter ground floor network in three residential quarters, the signal of f4 frequency only needs the core of coverage cell to get final product, to reduce the possibility that produces co-channel interference between the neighbor cell.Concrete, can by adjusting relevant parameter, as adjusting the frequency transmitting power and/or adopting the different modes such as antenna lower decline angle, guarantee that the base station forms ground floor network and the required signal strength signal intensity of second layer network in each residential quarter.
The residential quarter that it covers for needs, a base station needs to support two above carrier waves, if base station ability is only supported single carrier, then can adopt the mode of two base station parallel connections, guarantees that the base station can support two carrier waves at least.The working method of base station can be shown in Fig. 7 (a) and Fig. 7 (b).
Embodiment three,
The hierarchical network that the network coverage method that provides for the embodiment of the invention one forms, the embodiment of the invention three provides a kind of method that accesses hierarchical network, is illustrated in figure 8 as the flow chart of steps of the method, comprising:
This step specifically comprises: the access request that receiving terminal is initiated, when the terminal of this initiation access request only is positioned at the ground floor network coverage regional, with this terminal access ground floor network, when this terminal is positioned at ground floor network and common cover regional of any non-ground floor network of one deck, this terminal is accessed non-ground floor network in the common overlay area, when this terminal is positioned at common cover regional of three-layer network at least, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
Concrete, Signal to Interference plus Noise Ratio that can be current according to each layer network in the common overlay area of three-layer network (Signal to Interference plus Noise Ratio, SINR) or according to SINR and Reference Signal Received Power (the Reference Signal Receiving Power of current each layer network, RSRP), this terminal is accessed at random the layer network except the ground floor network in the common overlay area of three-layer network.
According to the network load of this layer network of current terminal access and/or the position of terminal, terminal is switched the network that is linked into other layers.
In the scheme of the access network that present embodiment provides, can according to the situation at network load and terminal place, select access and resident network.
Embodiment four,
The embodiment of the invention four provides a kind of base station, is illustrated in figure 9 as the structural representation of this base station, comprises receiver module 21 and access module 22, wherein:
This base station also comprises handover module 23:
The base station that provides among the base station that provides in the present embodiment and the embodiment two can be same base station.
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. network coverage method is characterized in that the method comprises:
Determine mutually all non-overlapping at least three one-level frequency ranges, in treating any two neighbor cells of overlay area, use different one-level frequency ranges to cover, form the ground floor network of continuous covering in the described overlay area for the treatment of;
Determine and the equal non-overlapping secondary frequency range of described at least three one-level frequency ranges, in the first subregion of described at least one residential quarter for the treatment of the overlay area, use this secondary frequency range to cover, the the first subregion zero lap that uses this secondary frequency range to cover in described any two neighbor cells for the treatment of the overlay area forms the second layer network of discontinuous covering in the described overlay area for the treatment of.
2. the method for claim 1 is characterized in that, described treat that the overlay area forms the second layer network of discontinuous covering after, the method also comprises:
Carry out the following step, and the following step of every execution, the m value adds 1, until the m value reaches set point M, finishes the execution of the following step, and the initial value of m is set as 3:
The frequency range of determining and having determined is a non-overlapping m level frequency range all, in the m-1 subregion of described at least one residential quarter for the treatment of the overlay area, use this m level frequency range to cover, the m-1 subregion zero lap that described any two neighbor cells for the treatment of the overlay area use this m level frequency range to cover forms the m layer network of discontinuous covering in the described overlay area for the treatment of.
3. method as claimed in claim 2 is characterized in that, determines by the following method the described area for the treatment of the subregion that the n layer network covers in i residential quarter, overlay area, and described n is the positive integer greater than 1:
Wherein:
It is the area of overlay area of the 1st layer network of i residential quarter;
T
iIt is the total throughout of i residential quarter;
I
iBe i the co-channel interference that the residential quarter is subject to;
α, beta, gamma are the coefficient factor, are used for adjusting correlative factor for the impact of overlay area.
4. a base station is characterized in that, this base station comprises:
The first overlay module is used for determining mutually all non-overlapping at least three one-level frequency ranges, uses different one-level frequency ranges to cover in treating any two neighbor cells of overlay area, forms the ground floor network of continuous covering in the described overlay area for the treatment of;
The second overlay module, be used for to determine and the equal non-overlapping secondary frequency range of described at least three one-level frequency ranges, in the first subregion of described at least one residential quarter for the treatment of the overlay area, use this secondary frequency range to cover, the the first subregion zero lap that uses this secondary frequency range to cover in described any two neighbor cells for the treatment of the overlay area forms the second layer network of discontinuous covering in the described overlay area for the treatment of.
5. base station as claimed in claim 4 is characterized in that, this base station also comprises the m overlay module, m=3, and 4......M:
The m overlay module, be used for all non-overlapping m level frequency ranges of definite frequency range with having determined, in the m-1 subregion of described at least one residential quarter for the treatment of the overlay area, use this m level frequency range to cover, the m-1 subregion zero lap that described any two neighbor cells for the treatment of the overlay area use this m level frequency range to cover forms the m layer network of discontinuous covering in the described overlay area for the treatment of.
6. base station as claimed in claim 5 is characterized in that,
Described n overlay module, concrete being used for determined the described area for the treatment of the subregion that i residential quarter, overlay area n layer network covers by the following method, described n is the positive integer greater than 1:
Wherein:
T
iIt is the total throughout of i residential quarter;
I
iBe i the co-channel interference that the residential quarter is subject to;
α, beta, gamma are the coefficient factor, are used for adjusting correlative factor for the impact of overlay area.
7. an access utilizes the method for the network that the arbitrary described method of claim 1～3 covers, and it is characterized in that the method comprises:
The access request that receiving terminal is initiated;
When this terminal only is positioned at the ground floor network coverage regional, with this terminal access ground floor network, when this terminal is positioned at ground floor network and common cover regional of any non-ground floor network of one deck, this terminal is accessed non-ground floor network in the common overlay area, when this terminal is positioned at common cover regional of three-layer network at least, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
8. method as claimed in claim 7 is characterized in that, after accessing terminal to network, the method also comprises:
According to the network load of this layer network of current terminal access and/or the position of terminal, terminal is switched the network that is linked into other layers.
9. method as claimed in claim 7 is characterized in that, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random, specifically comprises:
According to the current Signal to Interference plus Noise Ratio SINR of each layer network in the common overlay area of three-layer network or according to SINR and the Reference Signal Received Power RSRP of current each layer network, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
10. a base station is characterized in that, this base station comprises:
Receiver module is used for the access request that receiving terminal is initiated;
Access module, be used for when this terminal only is positioned at the ground floor network coverage regional, with this terminal access ground floor network, when this terminal is positioned at ground floor network and common cover regional of any non-ground floor network of one deck, this terminal is accessed non-ground floor network in the common overlay area, when this terminal is positioned at common cover regional of three-layer network at least, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
11. base station as claimed in claim 10 is characterized in that, this base station also comprises:
Handover module for the network load of this layer network that accesses according to current terminal and/or the position of terminal, switches terminal on the network that is linked into other layers.
12. base station as claimed in claim 10 is characterized in that,
Described access module, concrete being used for according to the current Signal to Interference plus Noise Ratio SINR of each layer network of the common overlay area of three-layer network or according to SINR and the Reference Signal Received Power RSRP of current each layer network, this terminal is accessed the layer network except the ground floor network in the common overlay area of three-layer network at random.
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| CN201110192627.8A CN102883331B (en) | 2011-07-11 | 2011-07-11 | Network coverage method, base station, network accessing method, and base station |
| PCT/CN2012/078472 WO2013007192A1 (en) | 2011-07-11 | 2012-07-11 | Network coverage method and base station, and network access method and base station |
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| CN104254080A (en) * | 2013-06-28 | 2014-12-31 | 中国移动通信集团公司 | Different-frequency networking method |
| CN107371197A (en) * | 2016-05-11 | 2017-11-21 | 中国移动通信有限公司研究院 | A kind of switching method and base station |
| CN111586733A (en) * | 2020-05-22 | 2020-08-25 | 中国联合网络通信集团有限公司 | Method and device for determining edge rate |
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| WO2005125250A1 (en) * | 2004-06-22 | 2005-12-29 | Nortel Networks Limited | Soft handoff in ofdma system |
| CN101621805A (en) * | 2008-06-30 | 2010-01-06 | 展讯通信（上海）有限公司 | Method for improving edge performance of wireless communication system |
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| CN104254080A (en) * | 2013-06-28 | 2014-12-31 | 中国移动通信集团公司 | Different-frequency networking method |
| CN104254080B (en) * | 2013-06-28 | 2018-07-27 | 中国移动通信集团公司 | A kind of inter-frequency networking method |
| CN107371197A (en) * | 2016-05-11 | 2017-11-21 | 中国移动通信有限公司研究院 | A kind of switching method and base station |
| CN111586733A (en) * | 2020-05-22 | 2020-08-25 | 中国联合网络通信集团有限公司 | Method and device for determining edge rate |
| CN111586733B (en) * | 2020-05-22 | 2023-05-30 | 中国联合网络通信集团有限公司 | Edge rate determining method and device |
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| Publication number | Publication date |
|---|---|
| WO2013007192A1 (en) | 2013-01-17 |
| CN102883331B (en) | 2014-12-31 |
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