CN101257338A - Method and device for transmitting signal with distributed aerial - Google Patents
Method and device for transmitting signal with distributed aerial Download PDFInfo
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- CN101257338A CN101257338A CNA2007100378000A CN200710037800A CN101257338A CN 101257338 A CN101257338 A CN 101257338A CN A2007100378000 A CNA2007100378000 A CN A2007100378000A CN 200710037800 A CN200710037800 A CN 200710037800A CN 101257338 A CN101257338 A CN 101257338A
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Abstract
The invention aims at providing a technical project which uses distributed antenna to transmit signal in wireless communication network, combines the uplink signal in steps, and transmits the downlink signal in unicast. A wireless communication system using the technical project of the invention provides larger capacity and thuoughput than the traditional cellular WiMAX system and provides larger range for the low density/traffic area.
Description
Technical field
The present invention relates to cordless communication network, relate in particular to the distributing antenna system in the cordless communication network.
Background technology
IEEE 802.16WiMAX (micro-wave access global inter communication) system uses the frequency spectrum of high band, and serious decline has limited the coverage of each base station.In the WiMAX system, the distribution of bandwidth is relevant with channel quality with the distance between base station and the subscriber station.Although the throughput of each base station 280Mbps of suggestion in IEEE802.16, in real system, because the random distribution of subscriber station in the sub-district, the certain user stands and adopts QPSK or 16QAM modulation, and the base station can not reach the peak value of the throughput of above-mentioned suggestion.
Relay station/repeater may be an inexpensive solution of expanding the coverage area and increasing power system capacity, but owing to be operated in identical wireless frequency, relay station/repeater is subjected to disturbing in the very big frequency range.
The superminiature honeycomb is to address these problems the most feasible method, and problem but more is following.At first, network configuration and the cost of superminiature honeycomb own are very high, especially when the area extension coverage of low traffic.The second, the inevitable overlapping waste of radio resources that directly causes between the sub-district.The 3rd, frequent switching has proposed challenge to mobility.Even in the superminiature honeycomb, the centralized collection of wireless signal can not provide bigger capacity than distributed signal collection system.
Summary of the invention
The purpose of this invention is to provide a kind of technical scheme of in cordless communication network, utilizing spaced antenna to carry out the signal transmission and signal is progressively merged.
According to a first aspect of the invention, a kind of method that is used to transmit upward signal in the fringe node of cordless communication network is provided, wherein, described fringe node directly or via other fringe nodes is connected to the network equipment in the described cordless communication network, and this method may further comprise the steps: i. receives via one or more spaced antennas and/or one or more last and jumps the same source signal of the multichannel from a subscriber station that fringe node transmits; Ii. described multichannel is merged processing with source signal, treat output signal to obtain one the tunnel; Iii. treat that with described output signal is transmitted to next and jumps the fringe node or the described network equipment.
According to a second aspect of the invention, a kind of method that is used for converting downlink signal in the fringe node of cordless communication network is provided, wherein, described fringe node is connected to the network equipment in the described cordless communication network, and this method may further comprise the steps: A. receives and to treat forward signal and path indication information from the described network equipment; B. according to described path indication information, the described forward signal for the treatment of is sent to spaced antenna or next jumping fringe node of the indication information appointment of described path.
According to a third aspect of the invention we, a kind of method of communicating with subscriber station of being used in the network equipment of cordless communication network is provided, wherein, comprising: control the described network equipment and communicate via coupled one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node and described subscriber station.
According to a forth aspect of the invention, a kind of uplink device that is used to transmit upward signal in the fringe node of cordless communication network is provided, wherein, described fringe node directly or via other fringe nodes is connected to the network equipment in the described cordless communication network, comprise: first receiving device is used to receive the same source signal of the multichannel from a subscriber station of jumping the fringe node transmission via one or more spaced antennas and/or one or more last; Merge processing unit, be used for described multichannel is merged processing with source signal, treat output signal to obtain one the tunnel; And first dispensing device, be used for described treat output signal be transmitted to described next jump fringe node or described network equipment.
According to a fifth aspect of the invention, a kind of downlink transfer device that is used for converting downlink signal in the fringe node of cordless communication network is provided, wherein, described fringe node is connected to the network equipment in the described cordless communication network, this downlink transfer device comprises: second receiving system is used to receive and treats forward signal and path indication information from the described network equipment; Second dispensing device is used for according to described path indication information, and the described forward signal for the treatment of is sent to spaced antenna or next jumping fringe node of the indication information appointment of described path.
According to a sixth aspect of the invention, a kind of communication control unit of communicating with subscriber station of being used in the network equipment of cordless communication network is provided, wherein, controlling the described network equipment communicates via coupled one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node and described subscriber station.
The present invention is because the technical scheme that adopted many antennas progressively to merge, compares with traditional honeycomb WiMAX system, provides bigger capacity and throughput, for low-density/traffic carrying capacity area provides bigger coverage.Compare with existing repeater, obtain better space diversity gain.And for subscriber station provides more level and smooth switching, need just between antenna, not switch and can support mobility, even uncertain moving, and lower to the power requirement of subscriber station.
Description of drawings
By reading the following detailed description of non-limiting example being done with reference to accompanying drawing, it is more obvious that other features, objects and advantages of the present invention will become.
Fig. 1 is the network topology structure figure according to the cordless communication network of a specific embodiment of the present invention;
Fig. 2 is for being used to transmit the method flow diagram of upward signal in the fringe node of cordless communication network according to a specific embodiment of the present invention;
The method flow diagram of Fig. 3 for being used in wireless communication network base station according to a specific embodiment of the present invention communicating with subscriber station;
Fig. 4 a reduces the scheme schematic diagram that disturbs between the sub-district in the single frequency network for utilize the spaced antenna cell radio resource to distribute according to a specific embodiment of the present invention in wireless communication network base station;
Fig. 4 b is the statistics schematic diagram according to a specific embodiment of the present invention neighbor cell uplink interference factor in the distributing antenna system of cordless communication network;
Fig. 5 is for being used for the method flow diagram of converting downlink signal in the fringe node of cordless communication network according to a specific embodiment of the present invention;
Fig. 6 is for being used to transmit the uplink device block diagram of upward signal in the fringe node of cordless communication network according to a specific embodiment of the present invention;
The communication control unit block diagram of Fig. 7 for being used in wireless communication network base station according to a specific embodiment of the present invention communicating with subscriber station;
Fig. 8 is for being used for the downlink transfer device block diagram of converting downlink signal in the fringe node of cordless communication network according to a specific embodiment of the present invention;
Fig. 9 a is the WiMAX error rate of system schematic diagram that does not adopt spaced antenna in the prior art;
Fig. 9 b is the error rate schematic diagram that adopts the WiMAX system of four spaced antennas according to a specific embodiment of the present invention;
Figure 10 a is the correct estimated probability schematic diagram of WiMAX system that does not adopt spaced antenna in the prior art;
Figure 10 b is the correct estimated probability schematic diagram that adopts the WiMAX system of five spaced antennas according to a specific embodiment of the present invention;
Figure 11 a is a correct estimated probability schematic diagram when adopting the WiMAX system of five spaced antennas to adopt maximum ratio to merge according to a specific embodiment of the present invention;
Figure 11 b is a correct estimated probability schematic diagram when adopting the WiMAX system of five spaced antennas to adopt the soft merging of log-likelihood ratio according to a specific embodiment of the present invention.
Embodiment
Fig. 1 shows the network topology structure figure according to the cordless communication network of a specific embodiment of the present invention.Comprise base station 21, a plurality of fringe nodes that link to each other with base station 21, a plurality of spaced antennas that link to each other with each fringe node and a plurality of subscriber station among Fig. 1.Multiple connected mode can be used for connecting between spaced antenna and fringe node, fringe node and base station 21 and the fringe node, as optical fiber, microwave, copper cash (Category-5 twisted pair), E-band, free space optical communication and 60GHz microwave communication.Preferably, connected mode is used optical fiber, and numeral such as copper cash connects.Therefore in spaced antenna, need analog digital converter and digital to analog converter, at this moment, fringe node detects the digitlization uplink signal from the spaced antenna that is connected with fringe node, and it is carried out demodulation, and possible merging is handled after the demodulation.When hope used analog link as microwave link to reduce the link lower deployment cost, analog digital converter/digital to analog converter then was arranged in fringe node.
As shown in Figure 1, fringe node can be regarded central authorities' processing/merge node of spaced antenna as, and fringe node can link to each other with the another one fringe node by the digital fiber backbone network, to return.Therefore, may receive the signal from subscriber station on the spaced antenna that same common fringe node links to each other, also may be the signal that receives on the spaced antenna that the fringe node adjacent with this common fringe node links to each other from this subscriber station.Under these circumstances, progressively to merge be to carry out the solution that serial merges at continuous fringe node to many antennas.The upward signal of subscriber station 5 as shown in fig. 1.
In down link, consider and compared radio hookup, multicast and clean culture.Here Lian Bo notion is exactly that a plurality of antennas send identical signal simultaneously to same subscriber station.Clean culture is a full blast in down link.And because the different skews of spaced antenna, radio hookup and multicast may cause the decreased performance of subscriber station.Another advantage of unicast transmission is do not require strictness synchronous in the downlink transfer, and this helps reducing cost and making things convenient for network design.
The judgement of signal bit can be finished in fringe node, also can be finished by the base station.In some cases, if when the merging of the signal in fringe node effect is good especially, reach predetermined requirement etc. as signal to noise ratio, also can in fringe node, do bit decision, can reduce between the fringe node like this and the service load quantity between fringe node and the base station.In fringe node,, then need not to carry out again union operation if bit is adjudicated.
Fully connected topology has been taked in connection among Fig. 1 between fringe node and the base station.Can certainly take to be the stelliform connection topology configuration at center or to be the mixed structure of the tree topology of root or stelliform connection topology configuration and tree topology coexistence with base station 21 with base station 21.When normal data transfer, preferably, adopt hub-and-spoke configuration or tree, for example among Fig. 1 between fringe node 12 and the fringe node 15 be connected and fringe node 13 and fringe node 15 between be connected (wireless or wired) disconnect or when removing shown in topological structure.
In the practical application,, can on physical connection, introduce certain redundancy, network topology structure is reticulated in order to increase the robustness of network topology structure.For example increase among Fig. 1 between fringe node 12 and the fringe node 15 be connected and fringe node 13 and fringe node 15 between be connected.Like this, if when being connected between fringe node 12 and the fringe node 13 breaks down, fringe node 12 can be via communicating between fringe node 15 and fringe node 16 and the base station 21; Perhaps when being connected between fringe node 13 and the base station 21 broke down, fringe node 13 can be communicated by letter with base station 21 via fringe node 15 and fringe node 16.
In the uplink, the next-hop node of each fringe node can be good according to the prior static configuration of network topology structure by base station 21.In Fig. 1, the next-hop node of fringe node 11 is fringe nodes 12, and the next-hop node of fringe node 12 is fringe nodes 13, and the next-hop node of fringe node 13 is base stations 21.The next-hop node of fringe node 14 is fringe nodes 15, and the next-hop node of fringe node 15 is fringe nodes 16, and the next-hop node of fringe node 16 is base stations 21.
Come in the key diagram 1 respectively the process of 5 subscriber stations below in conjunction with Fig. 1 with communication between the base station 21.
The uplink and downlink communication process of subscriber station 1 and base station 21
As shown in Figure 1, in uplink, fringe node 11 receives the upward signal of two-way from subscriber station 1 via antenna 111 and 112, and described two paths of signals is merged after the processing, sends to base station 21 via fringe node 12 and 13.Simultaneously, fringe node 11 is according to the quality of this two paths of signals, the perhaps channel quality of communication link between the channel quality of communication link and antenna 112 and the subscriber station 1 between antenna 111 and the subscriber station 1, determine the optimal path of downlink communication, for example via the signal quality of antenna 112 significantly better than signal quality via antenna 111, determine that then the path that communicates via antenna 112 and subscriber station 1 is descending optimal path, and can the variance and the described channel condition information of descending optimal path information and two-way upward signal be issued base station 21 with aforementioned signal.
When downlink transfer, the base station is according to described descending optimal path and the variance of described two-way upward signal and the optimal path that channel condition information is determined actual transmission downstream signal about subscriber station 1 from fringe node 11.Because 1 of subscriber station is in the region within the jurisdiction of the antenna 111,112 that links to each other with fringe node 11, therefore, the base station can determine directly that the descending optimal path from fringe node 11 is the descending optimal path of actual transmission.In Fig. 1, subscriber station 5 is in two fringe nodes 15 and 16 zones of being had jurisdiction over, and then base station 21 will be taken all factors into consideration from the descending optimal path information of fringe node 15 and 16 and determine the actual descending optimal path that sends downstream signal to subscriber station 5.
Base station 21 sends to fringe node 13 with the path indication information of downstream signal and this signal, fringe node 13 is transmitted to fringe node 12 according to described path indication information with the path indication information of described downstream signal and this signal, fringe node 12 is transmitted to fringe node 11 according to this path indication information with the path indication information of described downstream signal and this signal, fringe node 11 is according to described path indication information, described downstream signal is issued antenna 112, at last, antenna 112 sends to subscriber station 1 with described downstream signal.
The uplink and downlink communication process of subscriber station 2 and base station 21
In uplink, fringe node 12 is via the upward signal of antenna 121 from subscriber station 2, send to base station 21 via fringe node 13, simultaneously, fringe node 12 is with the quality of described upward signal, and perhaps the channel conditions of communication link is issued base station 21 with aforementioned upward signal between antenna 121 and the subscriber station 2.
When downlink transfer, because subscriber station 2 is only in antenna 121 regions within the jurisdiction, so base station 21 can directly be determined via antenna 121 transmission downstream signals to subscriber station 2.
Base station 21 at first sends to fringe node 13 with downstream signal and this signal path indication information, fringe node 13 is transmitted to fringe node 12 according to this path indication information with described downstream signal and path indication information, fringe node 12 sends to antenna 121 according to described path indication information with described downstream signal, and last antenna 121 sends to subscriber station 3 with described downstream signal.
The uplink and downlink communication process of subscriber station 3 and base station 21
In up link, fringe node 13 receives the upward signal of two-way from subscriber station 3 via antenna 131 and 132, and described two paths of signals is merged after the processing, directly sends to base station 21.Simultaneously, fringe node 13 is according to the quality of this two paths of signals, the perhaps channel quality of communication link between the channel quality of communication link and antenna 132 and the subscriber station 3 between antenna 131 and the subscriber station 3, determine the optimal path of downlink communication, such as via the signal quality of antenna 131 and similar via the signal quality of antenna 132, then determine via antenna 131,132 and the path that communicates of subscriber station 3 be all descending optimal path, and can the variance and the described channel condition information of descending optimal path information and two-way upward signal be issued base station 21 with aforementioned signal.
When downlink transfer, the base station is according to described descending optimal path and the variance of described two-way upward signal and the optimal path that channel condition information is determined actual transmission downstream signal about subscriber station 3 from fringe node 13.Because 3 of subscriber stations are in the region within the jurisdiction of the antenna 131,132 that links to each other with fringe node 13, therefore, the base station can determine directly that the descending optimal path from fringe node 13 is the descending optimal path of actual transmission.
Base station 21 sends to fringe node 13 with downstream signal and this signal path indication information, and fringe node 13 sends to antenna 131,132 according to this path indication information with this downstream signal then, by antenna 131,132 signal is sent to subscriber station 3 at last.
The uplink and downlink communication process of subscriber station 4 and base station 21
As shown in Figure 1, in uplink, fringe node 14 sends this signal to fringe node 15 then via the signal of antenna 141 reception subscriber stations 4.Fringe node 15 receives the signal from subscriber station 4 that transmits via antenna 151,152, and from the signal of fringe node 14 via the subscriber station 4 of antenna 141 receptions, 15 pairs of above-mentioned three road signals of fringe node merge after the processing, send to base station 21 via fringe node 16.
For fringe node 4, only within antenna 141 regions within the jurisdiction, antenna 141 is the descending optimal path of subscriber station 4 to subscriber station 4.Fringe node 14 is with the above-mentioned quality from the upward signal of subscriber station 4 that receives via antenna 141, and perhaps the channel conditions of communication link is issued fringe node 15 with aforementioned upward signal between antenna 141 and the subscriber station 4.
For fringe node 15, only within antenna 151 regions within the jurisdiction, antenna 151 is the descending optimal path of subscriber station 4 to subscriber station 4 equally.Fringe node 15 is the above-mentioned quality from the upward signal of subscriber station 4 that receives via antenna 151, and perhaps the channel conditions of communication link is issued base station 21 with the upward signal after the aforementioned merging and from fringe node 14 about the channel conditions from communication link between the quality of the upward signal of subscriber station 4 or antenna 141 and the subscriber station 4 that antenna 141 receives between antenna 151 and the subscriber station 4.
When downlink transfer, base station 21 is according to described descending optimal path and the variance of described two-way upward signal and the optimal path that channel condition information is determined actual transmission downstream signal about subscriber station 4 from fringe node 15 and fringe node 14.If the channel conditions between subscriber station 4 and the antenna 141 is better than the channel conditions between subscriber station 4 and the antenna 151, then base station 21 selects antenna 141 to send.If the channel conditions between subscriber station 4 and the antenna 141 is better than the channel conditions between subscriber station 4 and the antenna 151, then base station 21 selects antenna 141 to send.
The uplink and downlink communication process of subscriber station 5 and base station 21
As shown in Figure 1, in uplink, the two paths of signals that fringe node 15 receives from subscriber station 5 via antenna 151 and antenna 152 merges after the processing two paths of signals, then with this signal together with sending fringe node 16 to.Simultaneously, fringe node 15 is according to the quality of this two paths of signals, the perhaps channel quality of communication link between the channel quality of communication link and antenna 152 and the subscriber station 5 between antenna 151 and the subscriber station 5, determine the optimal path of downlink communication, if be worse than signal quality via antenna 152 via the signal quality of antenna 151, determine that then the path that communicates via antenna 152 and subscriber station 5 is descending optimal path, and the variance and the described channel condition information of descending optimal path information and two-way upward signal are issued base station 21 via fringe node 16 with aforementioned signal.
Certainly, for fringe node 15 and 16, the transmission means of the another possibility of the upstream data of subscriber station 5 is: when the signal quality from user 5 stations that receives when fringe node 15 is enough good, fringe node 15 is directly done the signal bit judgement, like this, when fringe node 16 receives from fringe node 15 about the signal after the bit decision of subscriber station 5, directly it is transmitted to the base station, and need not to merge with the signal of the subscriber station 5 that receives via antenna 161.
When downlink transfer, base station 21 is according to described descending optimal path information and the variance of described three road upward signals or the optimal path that channel condition information is determined actual transmission downstream signal about subscriber station 5 from fringe node 16 and fringe node 15.If the channel conditions between subscriber station 5 and the antenna 152 is better than channel conditions between subscriber station 5 and the antenna 151 and the channel conditions between subscriber station 5 and the antenna 161, then base station 21 selects antennas 152 to send.
Base station 21 also can be according to the position of subscriber station, the next-hop node of each fringe node of dynamic-configuration.For example work as subscriber station 6 and be positioned in antenna 153 and antenna 133 regions within the jurisdiction, for the signal of subscriber station 6, the next-hop node of configuration fringe node 15 is a fringe node 13.For the signal from subscriber station 5, the next-hop node of configuration fringe node 15 is a fringe node 16.
Another optional configuration mode is: many passback paths according to possible, dispose a plurality of next-hop nodes.For example, 21 path has three to fringe node 15 to the base station, is respectively to arrive base stations 21 via fringe node 12, fringe node 13 and fringe node 16.So but the next-hop node of base station 21 static configuration fringe nodes 15 comprises fringe node 12, fringe node 13 and fringe node 16.Fringe node 15 all forwards the signal that receives via this three paths.The 21 pairs of same signals that receive via different paths in base station are selected or are merged processing.
For subscriber station 6, when the next-hop node static configuration of fringe node 15 is a fringe node 16, and when the next-hop node static configuration of fringe node 13 is base station 21, the upward signal one tunnel of subscriber station 6 arrives base station 21 via antenna 133, fringe node 13, and another road arrives base station 21 via antenna 153, fringe node 15 and fringe node 16.This two paths of signals that 21 pairs of base stations receive merges processing.
In addition, owing to the mobility of subscriber station, also can in time exchange the information of its subscriber station of having jurisdiction between the fringe node mutually, then, fringe node is according to the topological structure of this information and network itself, its next-hop node of Dynamic Selection (base station or fringe node).Those skilled in the art will appreciate that network topology structure of the present invention is not limited to the combination in any of above-mentioned star-like, tree type, netted or these three kinds of structures, next selection of jumping fringe node simultaneously also is not limited to example listed above.Because the variation of network topology structure and the mobility of subscriber station will be selected optimum next-hop node in conjunction with concrete application scenarios.
More than several application scenarioss of the present invention are had been described in detail, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Fig. 2 is for being used to transmit the method flow diagram of upward signal in fringe node according to a specific embodiment of the present invention.Wherein, fringe node links to each other with spaced antenna by for example wired or wireless modes such as twisted-pair feeder, coaxial cable, optical fiber or microwave.Step shown in Fig. 2 is applicable to that fringe node receives the situation of coming incessantly from the same source signal of same subscriber station via coupled spaced antenna.If fringe node only receives the signal of coming from a subscriber station, then need not to carry out above-mentioned union operation, directly give next-hop node or base station with this signal forwarding; When perhaps receiving the signal of having adjudicated, also need not to carry out union operation, the signal forwarding of having adjudicated that directly will receive is given next-hop node.
At first, in step S101, receive the same source signal of the multichannel from a subscriber station of jumping the fringe node transmission via one or more spaced antennas and/or one or more last.The cordless communication network of working as here is non-sign indicating number subsystem, discerns the same source signal of described multichannel from a subscriber station by the time and frequency shift amount in each road signal; When cordless communication network is the sign indicating number subsystem, discern the same source signal of described multichannel by the scrambler and the spreading code of each road signal from a subscriber station, fringe node can be known scrambler and the spreading code with each subscriber station correspondence in advance from the base station.
Then, described multichannel is merged processing with source signal, treat output signal to obtain one the tunnel.Here the mode of He Binging is not limit, and it is all suitable to merge (MRC), the soft merging of log-likelihood ratio, selectivity merging or equal gain combining etc. as maximum ratio.At last, treat that with described output signal is transmitted to next and jumps the fringe node or the described network equipment.As step S102 among Fig. 2 to shown in the step S108.
In step S102, detect the signal quality of the described every road that receives with source signal, the standard of Jian Ceing includes but not limited to that each road is with the variance of source signal, each road various parameters with the gauge signal quality such as signal to noise ratio of the channel conditions of source signal, each road signal here.
In step S103, according to the testing result among the step S102, from described multichannel with selecting two-way the source signal or multiple signals are top-quality merges processing with source signal, to generate one road combined signal.Certainly, those skilled in the art will appreciate that and not necessarily leave no choice but select top-quality signal, also the second best in quality signal can be merged.
In step S104, detect the signal quality of combined signal among the step S103, take with step S102 in the similar detection standard.
In step S105, according to the testing result of S102 and S104, the signal quality of the signal quality of more described combined signal and described two-way that is used to merge or multiple signals.
When the signal quality of described combined signal is worse than or equal the described two-way that is used to merge or multichannel with the signal quality of source signal, then in step S106, with the described two-way that is used for merging or multichannel with source signal top-quality a tunnel as the described output signal for the treatment of, be transmitted to next and jump fringe node or base station.
When the signal quality of described combined signal is better than the described two-way that is used to merge or multichannel with the signal quality of source signal, then in step S107, judge whether to satisfy predetermined condition, if satisfy predetermined condition, then in step S108 with described combined signal as the described output signal for the treatment of, be transmitted to next and jump fringe node or base station.In the network topology structure of reality, the base station can be come the next-hop node of each fringe node of static configuration or come the next-hop node of each fringe node of dynamic-configuration in conjunction with the position of subscriber station according to network topology structure.For example, among Fig. 1, configuration fringe node 13 is the next-hop node of fringe node 12.
The predetermined condition here includes but not limited to following several situation:
1. the multichannel of described reception has all merged processing with source signal;
2. the merging number of processes of having carried out has surpassed first predetermined value, and first predetermined value needs to set in advance here, for example exists under the situation of multichannel with source signal, and in order to improve the processing speed of fringe node, can set the merging number of times is three times;
The signal quality of described combined signal and the described two-way that is used for merging or multichannel with the difference of the signal quality on the every road of source signal all less than second predetermined value, for example, when the variance of combined signal with merge before two-way or the variance of multiple signals all less than 0.01 the time; Perhaps the variance of combined signal with merge before quality preferably the variance of that road signal less than 0.01.The physical significance here mainly is when merging can not obviously improve signal quality, then need not to proceed to merge.
When judgement is not satisfied predetermined condition in step S107, then in step S109, with described combined signal as the one tunnel new same source signal that is used for merging with a tunnel or multiple signals quality of all the other same source signals that merge preferably with source signal, repeating step S103 is to step S107, until satisfying predetermined condition.
As the embodiment of a variation, also can save step S104 to S109, the signal after directly will merging for the first time treats that as described output signal is transmitted to next and jumps fringe node or base station.
Certainly, the signal way when at every turn merging is not limit, and can be that two paths of signals merges together, can be that three tunnel even four road signals merge together yet.
Above step S101 to S109 has done detailed explanation to the handling process from the upward signal of the spaced antenna that links to each other with fringe node.Preferably, in the transmission upward signal (before or after also can), can also will report to the base station from the multichannel of same subscriber station with the signal quality relevant information of source signal via each spaced antenna.The signal quality relevant information can comprise the optimal path set that is used to indicate downlink path, each road with the variance of source signal, each road with the channel conditions of source signal etc.
When downlink transfer, the signal quality relevant information of each the road signal the when base station can be according to uplink is selected optimum downlink transmission path, and the indication fringe node carries out downstream signal and transmits.
Fig. 3 shows according to a specific embodiment of the present invention and be used for the method flow diagram that communicates with subscriber station in wireless communication network base station.
At first, in step S201, the base station receives the report message from described one or more fringe nodes, and this report message comprises and the corresponding signal quality relevant information of described subscriber station.Here the signal quality relevant information comprise the optimal path set that is used for indicating downlink path, each road with the variance of source signal, channel conditions each or appoint multinomial information.Be connected wireless connections such as wired connections such as comprising twisted-pair feeder, coaxial cable, optical fiber and microwave between base station and the one or more fringe nodes.
Then, in step S202, the pairing path of the downstream signal indication information of described subscriber station is determined to send to according to the signal quality relevant information of described subscriber station in the base station.The path indication information comprise the indication described treat forward signal via one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node.
As shown in fig. 1, be example with the communication process between subscriber station 5 and the base station 21.When receiving the upward signal of subscriber station 5 or before or after, base station 21 receives the report message from fringe node 15 and fringe node 16, comprises the signal quality relevant information from subscriber station 5 that receives via antenna 151,152 respectively in the report message of fringe node 15.Comprise the signal quality relevant information that receives via antenna 161 in the report message of fringe node 16 from subscriber station 5.By comparing the signal quality of three Radio Links (antenna 151 and subscriber station 5, antenna 152 and subscriber station 5 and antenna 161 and subscriber station 5), determine a best downlink path.Here our hypothesis is best via the signal quality from the signal of subscriber station 5 that antenna 152 receives.Then the base station 21 pairing optimal path of downstream signal of determining to issue subscriber station 5 is for sending to subscriber station 5 via fringe node 16,15 by antenna 152.
When described cordless communication network is multicarrier system, OFDMA system for example, can also be according to the signal quality relevant information of described subscriber station, determine the geographical position of described subscriber station, then according to the position of this subscriber station, the Time And Frequency resource of scheduling when this subscriber station communications, thus reduce in the sub-district and disturb between neighbor cell.
For example, be example with the subscriber station among Fig. 12,, can determine that subscriber station 2 is positioned within antenna 121 administrative areas according to from the signal quality relevant information of fringe node 12 about subscriber station 2.
According to the geographical position of this subscriber station 2, dispatch the time and the frequency resource of communicating by letter then with this subscriber station 2.When fixed-frequency configuration that each spaced antenna in the sub-district uses, then come the used communication frequency in configure user station 2 according to the employed frequency of spaced antenna of communicating by letter with subscriber station 2.When each spaced antenna uses dynamic frequency configuration in the sub-district, then need the associating neighbor cell, integrated configuration, make at one time in, the adjacent antenna of same sub-district or neighbor cell uses different subcarriers, and the sub-carrier frequencies of the antenna that communicates with is used at dispatched users station 2.Thereby in the minimizing sub-district and interference among adjacent cells, shown in Fig. 4 a.
Fig. 4 b has provided at portable terminal and has satisfied under the equally distributed condition, and uplink interference is along with the variation schematic diagram of fading channel index k.Here select the Microcell channel model (urban micro cell) of definition among the IEEE 802.16 for use, wherein large scale decline model comprise path attenuation 41.0+k * 1g (d) and separate variance be 2.3dB cover decay at random, wherein d is a propagation distance; And the hypothesis communication environments is sighting distance (LOS).The traditional base station system of 1 antenna, the contrast schematic diagram that adopts the distributing antenna system of 3 antennas and adopt the distributing antenna system of 7 antennas composition have been provided among Fig. 4 b.Adopt the time and the frequency resource method of the many distributing antenna systems and the scheduling spaced antenna of proposition of the present invention from Fig. 4 b as can be seen, inter-cell uplink interference is little a lot.
Fig. 5 shows the method flow diagram that is used for converting downlink signal according to a specific embodiment of the present invention in fringe node.Here, the network equipment of the cordless communication network of supposing fringe node and being connected to is the base station.Connected mode between fringe node and base station, fringe node and the spaced antenna comprises wireless connections modes such as wired connections such as twisted-pair feeder, coaxial cable, optical fiber or microwave.
At first, in step S191, receive and to treat converting downlink signal and path indication information from the base station.Here can be directly receive from the base station treat converting downlink signal and path indication information, as the fringe node 13,16 that directly links to each other with the base station among Fig. 1; Also can be via other fringe nodes receive from the base station treat converting downlink signal and path indication information, as the fringe node among Fig. 1 12,11 etc.Described path indication information comprise the indication described treat forward signal via one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node.
Then, in step S192,, the described forward signal for the treatment of is sent to spaced antenna or next jumping fringe node of the indication information appointment of described path according to described path indication information.
As shown in fig. 1, for the downstream signal that is sent to subscriber station 5, fringe node 16 receives from base station 21 and sends to the signal of subscriber station 5 and indication information (according to the hypothesis of front, the pairing optimal path of downstream signal that subscriber station 5 is determined to issue in base station 21 is for sending to subscriber station 5 via fringe node 16,15 by antenna 152), according to indication information this signal and indication information are transmitted to fringe node 15.Fringe node 15 receives the signal and the indication information that send to subscriber station 5 from base station 21 via fringe node 16, learns according to indication information, selects antenna 152 to transmit a signal to subscriber station 5.
Here be that example is illustrated converting downlink signal in the fringe node only with the downlink communication process between base station 21 and the subscriber station 5, for the downlink communication process between other subscriber stations and the base station 21, those skilled in the art can analogize according to the downlink communication process between base station 21 and the subscriber station 2, repeats no more here.
Fig. 6 shows the uplink device that is used to transmit upward signal according to a specific embodiment of the present invention in fringe node.This uplink device 10 comprises first receiving device 101, merges processing unit 102, determines the device 103 and first dispensing device 104.Wherein first receiving device also comprises first recognition device 1011 and second recognition device 1012, merges processing unit 102 and also comprises checkout gear 1021, merges device 1022, comparison means 1023, control device 1024.
At first, first receiving device 101 receives the same source signal of the multichannel from a subscriber station of jumping the fringe node transmission via one or more spaced antennas and/or one or more last.When cordless communication network is a non-sign indicating number subsystem, first recognition device 1011 is discerned the same source signal of described multichannel from a subscriber station by the time and frequency shift amount in each road signal; When cordless communication network is the sign indicating number subsystem, second recognition device 1012 is discerned the same source signal of described multichannel from a subscriber station by the scrambler and the spreading code of each road signal, and second recognition device 1012 can be known scrambler and the spreading code with each subscriber station correspondence in advance from the base station.
Then, merge 102 pairs of described multichannels of processing unit and merge processing, treat output signal to obtain one the tunnel with source signal; And, determine that device 103 is according to the same source signal of described multichannel from certain subscriber station, determine the corresponding signal quality relevant information of this subscriber station, the signal quality relevant information comprise the optimal path set, each road in indicating downlink path with in the variance of source signal, the channel conditions each or appoint multinomial.
At last, first dispensing device 104 is transmitted to described next jumping fringe node or described network equipment with described output signal and the signal quality relevant information treated, preferably, sends combined signal and signal quality relevant information simultaneously, also can separately send certainly.
Wherein, the merging processing procedure that merges processing unit 102 at length can be realized by four sub-devices such as checkout gear 1021, merging device 1022, comparison means 1023 and control device 1024.
At first, checkout gear 1021 detects every road of receiving signal quality with source signal.
Then, merge device 1022 with two or multiple signals are top-quality merges processing with source signal, generating one road combined signal, and checkout gear 1021 detects the signal quality of combined signals.Certainly, those skilled in the art will appreciate that and not necessarily leave no choice but select top-quality signal, also the second best in quality signal can be merged.
Comparison means 1023 compares the signal quality of described combined signal and the described two-way that is used to merge or the multichannel signal quality with source signal according to the testing result of checkout gear 1021, to generate comparative result.
When the comparative result of comparison means 1023 is that the signal quality of described combined signal is worse than or when equaling the described two-way that is used to merge or multichannel with the signal quality of source signal, then with the described two-way that is used for merging or multichannel with source signal top-quality a tunnel as the described output signal for the treatment of, be transmitted to next by first dispensing device 104 and jump fringe node or base station.
When the comparative result of comparison means 1023 is that the signal quality of described combined signal is better than the described two-way that is used to merge or the multichannel signal quality with source signal, and when not reaching predetermined condition, the described merging device 1022 of control device 1024 control merges processing with one or more better quality of signal of all the other same source signals that merge with source signal as the one tunnel new same source signal that is used for merging with described combined signal, to generate a new combined signal.Checkout gear 1021 detects the signal quality of new combined signal more then, and comparison means 1023 repeats aforementioned comparison procedure until satisfying predetermined condition.
The predetermined condition here includes but not limited to following several situation:
1. the multichannel of described reception has all merged processing with source signal;
2. the merging number of processes of having carried out has surpassed first predetermined value, and first predetermined value needs to set in advance here, for example exists under the situation of multichannel with source signal, and in order to improve the processing speed of fringe node, can set the merging number of times is three times;
The signal quality of described combined signal and the described two-way that is used for merging or multichannel with the difference of the signal quality on the every road of source signal all less than second predetermined value, for example, when the variance of combined signal with merge before two-way or the variance of multiple signals all less than 0.01 the time; Perhaps the variance of combined signal with merge before quality preferably the variance of that road signal less than 0.01.The physical significance here mainly is when merging can not obviously improve signal quality, then need not to proceed to merge.
As the embodiment of a variation, also can save comparison means 1023 and control device 1024, directly will merge device merging 1022 first time signal afterwards and treat that as described output signal is transmitted to next and jumps fringe node or base station.
Certainly, the signal way when at every turn merging is not limit, and can be that two paths of signals merges together, can be that three tunnel even four road signals merge together yet.
If first receiving device 101 receives the signal of coming from a subscriber station, then need not to carry out above-mentioned union operation, directly give next-hop node or base station with this signal forwarding by first dispensing device 104; When perhaps receiving the signal of having adjudicated, also need not to carry out union operation, the signal forwarding of having adjudicated that first dispensing device 104 directly will receive is given next-hop node.The base station can be come the next-hop node of each fringe node of static configuration or come the next-hop node of each fringe node of dynamic-configuration in conjunction with the position of subscriber station according to network topology structure.For example, among Fig. 1, configuration fringe node 16 is the next-hop node of fringe node 15.
Fig. 7 shows according to a specific embodiment of the present invention and be used for the communication control unit that communicates with subscriber station in the base station.This communication control unit 20 is used to control the base station and communicates via coupled one or more fringe nodes and the one or more spaced antennas that are connected with fringe node and described subscriber station.Be connected wireless connections such as wired connections such as comprising twisted-pair feeder, coaxial cable, optical fiber and microwave between fringe node and base station and/or other fringe nodes and/or the described spaced antenna.
This communication control unit 20 comprises that the 3rd receiving system 201, path determine device 202, position determining means 203 and dispatching device 204.
The report message that the 3rd receiving system 201 receives from described one or more fringe nodes, this report message comprise and corresponding each the road signal quality relevant information of described subscriber station.Described signal quality relevant information comprise the optimal path set that is used for indicating downlink path, each road with the variance of source signal, channel conditions each or appoint multinomial information.
Then, device 202 is determined according to described signal quality relevant information in the path, determines to send to the pairing path of the downstream signal indication information of described subscriber station.Described path indication information comprise the indication described treat forward signal via one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node.
With the downlink communication process between subscriber station shown in Fig. 13 and the base station is example.When receiving the upward signal of subscriber station 3 or before or after, receiving system 201 in the base station 21 receives the report message from fringe node 13, comprises the signal quality relevant information from subscriber station 3 that receives via antenna 131,132 in the report message of fringe node 13.By comparing the signal quality of two Radio Links (antenna 131 and subscriber station 3 and antenna 132 and subscriber station 3), device 202 definite best downlink path are determined in the path.Here our hypothesis is best via the signal quality from the signal of subscriber station 3 that antenna 132 receives.Then the path determines that device 202 determines to issue the pairing optimal path of downstream signal of subscriber station 3 for to send to subscriber station 3 via fringe node 13 by antenna 132.
When described cordless communication network is multicarrier system, OFDMA system for example, the signal quality relevant information of the described subscriber station that position determining means 203 can also receive according to the 3rd receiving system 201 is determined the geographical position of described subscriber station; Dispatching device 204 is according to the geographical position of this subscriber station then, the time and the frequency resource of scheduling and the spaced antenna of this subscriber station communications.Thereby in the minimizing sub-district and interference among adjacent cells.
For example, be example with the subscriber station among Fig. 12, according to from the signal quality relevant information of fringe node 12 about subscriber station 2, position determining means 203 can determine that subscriber station 2 is positioned within antenna 121 administrative areas.
Then, according to the geographical position of this subscriber station 2, time and frequency resource that dispatching device 204 scheduling are communicated by letter with this subscriber station 2.When fixed-frequency configuration that each spaced antenna in the sub-district uses, then come the used communication frequency in dispatched users station 2 according to the employed frequency of spaced antenna of communicating by letter with subscriber station 2.When each spaced antenna uses dynamic frequency configuration in the sub-district, then need associating neighbor cell integrated dispatch, in making at one time, the adjacent antenna of same sub-district or neighbor cell uses different subcarriers, and the sub-carrier frequencies of the antenna that communicates with is used at dispatched users station 2.Thereby in the minimizing sub-district and interference among adjacent cells.
Fig. 8 shows the downlink transfer device that is used for converting downlink signal according to a specific embodiment of the present invention in the fringe node of cordless communication network.Be connected wireless connections such as comprising twisted-pair feeder, coaxial cable, optical fiber wired connection and microwave between fringe node and base station and/or other fringe nodes and/or the described spaced antenna.
This downlink transfer device 19 comprises second receiving system 191, second dispensing device 192.
The path indication information that second dispensing device 192 receives according to second receiving system 191 sends to spaced antenna or next jumping fringe node of the indication information appointment of described path with the described forward signal for the treatment of.
Here be example still with the downlink communication situation between fringe node shown in Fig. 13 and the base station 21.For the downstream signal that is sent to subscriber station 3, fringe node 13 receives from base station 21 and sends to the signal of subscriber station 3 and indication information (according to the hypothesis of front, the pairing optimal path of downstream signal of subscriber station 3 is determined to issue for sending to subscriber station 3 via fringe node 13 by antenna 132 in base station 21), learn according to indication information, select antenna 132 to transmit a signal to subscriber station 3.
When it should be noted that specific implementation, the above-mentioned functions of fringe node also can be placed in the network equipment of base station for example and realize.
Fig. 9 a, 9b and Figure 10 a, 10b have provided the performance comparison schematic diagram that adopts spaced antenna WiMAX system and existing WiMAX system according to a specific embodiment of the present invention respectively.
Here the antenna coordinate of supposing the base station is (0.5,0.5), and the coordinate of four spaced antennas is respectively (0.25,0.25), (0.25,0.75), (0.75,0.25), (0.75,0.75), and encodes when adopting the 64QAM modulation, and signal to noise ratio is 6dB.Wherein select the Microcell channel model (urban micro cell) that defines among the IEEE802.16 for use, its large scale decline model comprise path attenuation 41.0+22.71g (d) and separate variance be 2.3dB cover decay at random, d is a propagation distance here; And suppose that communication environments is sighting distance (LOS), propagation distance is carried out normalization; Carrier frequency 3.5GHz, user are static, adopt the PUSC arrangement mode, 1024 FFT, 1/8 Cyclic Prefix, and sample frequency 11.424MHz does not consider chnnel coding.
Fig. 9 a is the existing WiMAX error rate of system schematic diagram that does not adopt spaced antenna, and Fig. 9 b is the error rate schematic diagram of the WiMAX system of aforementioned five spaced antennas of employing.Figure 10 a is the existing correct estimated probability schematic diagram of WiMAX system that does not adopt spaced antenna, and Figure 10 b is the correct estimated probability schematic diagram of the WiMAX system of aforementioned five spaced antennas of employing.From Fig. 9 a, 9b, 10a and 10b, can find out significantly, adopt the base station range of the WiMAX system of spaced antenna obviously to enlarge a lot.
Another one need to prove, in fringe node, the merging mode that take with source signal on each road is not done concrete qualification, both can adopt maximum ratio to merge (MRC), also can adopt the soft merging of log-likelihood ratio, or modes such as selectivity merging, equal gain combining.Preferably, the present invention recommends to use log-likelihood ratio to merge mode.Adopt respectively maximum ratio merging and log-likelihood ratio that Figure 11 has provided the WiMAX system that adopts 5 spaced antennas among Fig. 9 b and Figure 10 b merge the probability schematic diagram of the correct estimation that mode obtained.Can find out obviously that from figure the coverage of the probability of the correct estimation that the soft merging of employing log-likelihood ratio is obtained is more smooth.
More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the appended claims.
Claims (26)
1. method that in the fringe node of cordless communication network, is used to transmit upward signal, wherein, described fringe node directly or via other fringe nodes is connected to the network equipment in the described cordless communication network, and this method may further comprise the steps:
I. receive the same source signal of the multichannel from a subscriber station of jumping the fringe node transmission via one or more spaced antennas and/or one or more last;
Ii. described multichannel is merged processing with source signal, treat output signal to obtain one the tunnel;
Iii. treat that with described output signal is transmitted to next and jumps the fringe node or the described network equipment.
2. method according to claim 1, wherein, described step I i may further comprise the steps:
A. detect the signal quality of the described every road that receives with source signal;
B. according to the signal quality that is detected, with selection in the source signal two-way or multiple signals quality are merged processing with source signal preferably by described multichannel, to generate one road combined signal, as the described output signal for the treatment of.
3. method according to claim 2, wherein, described step I i is further comprising the steps of:
C. detect the signal quality of described combined signal;
D. the signal quality of described combined signal and the described two-way that is used to merge or multiple signals quality are compared with the signal quality of source signal preferably, to generate comparative result;
E. carry out following steps according to described comparative result:
If the signal quality of-described combined signal is better than the described two-way that is used for merging or the multichannel signal quality with the every road of source signal, then with described combined signal as the one tunnel new same source signal that is used for merging with one or more better quality of signal of all the other same source signals that merge with source signal, repeat above-mentioned steps b to d, until reaching predetermined condition, and with described combined signal as the described output signal for the treatment of.
4. method according to claim 3, wherein, described step e is further comprising the steps of:
If the signal quality of-described combined signal is not better than the described two-way that is used for merging or the multichannel signal quality with each road of source signal, then with the described two-way that is used for merging or multichannel with source signal better quality of signal one tunnel as the described output signal for the treatment of.
5. according to claim 3 or 4 described methods, wherein, described predetermined condition comprises in the following each:
The multichannel of-described reception has all merged processing with source signal;
-merging the number of processes of having carried out is above first predetermined value;
The signal quality of-described combined signal and the described two-way that is used for merging or multichannel with the difference of the signal quality on the every road of source signal all less than second predetermined value.
6. according to each described method in the claim 2 to 5, wherein, further comprising the steps of:
-according to the same source signal of the multichannel from described subscriber station of described reception, determine the corresponding signal quality relevant information of this subscriber station;
-described signal quality relevant information is sent to the described network equipment.
7. uplink device that in the fringe node of cordless communication network, is used to transmit upward signal, wherein, described fringe node directly or via other fringe nodes is connected to the network equipment in the described cordless communication network, and this uplink device comprises:
First receiving device is used to receive the same source signal of the multichannel from a subscriber station of jumping the fringe node transmission via one or more spaced antennas and/or one or more last;
Merge processing unit, be used for described multichannel is merged processing with source signal, treat output signal to obtain one the tunnel;
First dispensing device is used for the described output signal for the treatment of is transmitted to described next jumping fringe node or described network equipment.
8. uplink device according to claim 7 wherein, also comprises:
Checkout gear is used to detect every road of receiving signal quality with source signal;
Merge device, be used for two or the multiple signals quality merge processing with source signal preferably, treat output signal to generate one the tunnel.
9. uplink device according to claim 8, wherein,
Described checkout gear also is used to detect the signal quality of combined signal;
Wherein, also comprise:
Comparison means is used for the signal quality of described combined signal and the described two-way that is used to merge or the multichannel signal quality with source signal is compared, to generate comparative result;
Control device, be used for when described comparative result be that the signal quality of described combined signal is better than the described two-way that is used to merge or the multichannel signal quality with source signal, and when not reaching predetermined condition, then control described merging device and carry out following operation:
Described combined signal is merged processing with one or more better quality of signal of all the other same source signals that merge with source signal as the one tunnel new same source signal that is used for merging, to generate a new combined signal.
10. uplink device according to claim 9, wherein,
Described control device also be used for when described comparative result be that the signal quality of described combined signal is not when being better than the described two-way that is used to merge or multichannel with the signal quality on each road of source signal, select described two-way that is used for merging or multichannel with source signal better quality of signal one tunnel as the described output signal for the treatment of, with send to described next jump fringe node or described network equipment.
11. according to claim 9 or 10 described uplink devices, wherein, described predetermined condition comprises in the following each:
The multichannel of-described reception has all merged processing with source signal;
-merging the number of processes of having carried out is above first predetermined value;
The signal quality of-described combined signal and the described two-way that is used for merging or multichannel with the difference of the signal quality on the every road of source signal all less than second predetermined value.
12. each described uplink device in 11 according to Claim 8 wherein, also comprises:
Determine device, be used for determining the corresponding signal quality relevant information of this subscriber station according to the same source signal of described multichannel from certain subscriber station;
Wherein, described first dispensing device also is used for described signal quality relevant information is directly sent to the described network equipment or sends to the described network equipment via one or more fringe nodes.
13. a method that is used for converting downlink signal in the fringe node of cordless communication network, wherein, described fringe node is connected to the network equipment in the described cordless communication network, and this method may further comprise the steps:
A. receive and treat forward signal and path indication information from the described network equipment;
B. according to described path indication information, the described forward signal for the treatment of is sent to spaced antenna or next jumping fringe node of the indication information appointment of described path.
14. method according to claim 13, wherein, described steps A is:
-receive by last one jump that fringe node transmits treat forward signal and path indication information from the described network equipment.
15. a downlink transfer device that is used for converting downlink signal in the fringe node of cordless communication network, wherein, described fringe node is connected to the network equipment in the described cordless communication network, and this downlink transfer device comprises:
Second receiving system is used to receive and treats forward signal and path indication information from the described network equipment;
Second dispensing device is used for according to described path indication information, and the described forward signal for the treatment of is sent to spaced antenna or next jumping fringe node of the indication information appointment of described path.
16. downlink transfer device according to claim 15, wherein, described first receiving device also be used to receive by last one jump that fringe node transmits treat forward signal and path indication information from the described network equipment.
17. one kind is used for the method that communicates with subscriber station, wherein, comprises in the network equipment of cordless communication network:
Controlling the described network equipment communicates via coupled one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node and described subscriber station.
18. method according to claim 17 wherein, may further comprise the steps:
-receiving report message from described one or more fringe nodes, this report message comprises and the corresponding signal quality relevant information of described subscriber station;
-according to the signal quality relevant information of described subscriber station, determine to send to the pairing path of the downstream signal indication information of described subscriber station.
19., wherein, when described cordless communication network is multicarrier system, further comprising the steps of according to claim 17 or 18 described methods:
-according to the signal quality relevant information of described subscriber station, determine the geographical position of described subscriber station;
-according to the geographical position of this subscriber station, dispatch time and frequency resource with this subscriber station communications.
20. one kind is used for the communication control unit that communicates with subscriber station in the network equipment of cordless communication network, wherein, controlling the described network equipment communicates via coupled one or more fringe nodes and the one or more spaced antennas that are connected with described fringe node and described subscriber station.
21. communication control unit according to claim 20 wherein, comprising:
Receiving system is used to receive the report message from described one or more fringe nodes, and this report message comprises and corresponding each the road signal quality relevant information of described subscriber station;
Device is determined in the path, is used for according to described signal quality relevant information, determines to send to the pairing path of the downstream signal indication information of described subscriber station.
22. according to claim 20 or 21 described communication control units, wherein, when described cordless communication network was multicarrier system, this communication control unit also comprised:
Position determining means according to described signal quality relevant information, is determined the geographical position of described subscriber station;
Dispatching device, according to the geographical position of described subscriber station, the time and the frequency resource of scheduling and this subscriber station communications.
23. the fringe node in the cordless communication network wherein, comprises as each described uplink device and claim 15 in the claim 7 to 12 or 16 described downlink transfer devices.
24. the network equipment in the cordless communication network wherein, comprises as each described communication control unit in the claim 20 to 22.
25. the communication system in the cordless communication network, wherein, comprise the network equipment as claimed in claim 24 and one or more fringe nodes as claimed in claim 23 that link to each other with this network equipment, and the one or more spaced antennas that link to each other with each fringe node.
26. communication system according to claim 25, wherein, when a plurality of fringe nodes were connected to the described network equipment, described fringe node was directly connected to this network equipment, perhaps was connected to this network equipment via other fringe nodes.
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| CN2007100378000A CN101257338B (en) | 2007-03-02 | 2007-03-02 | Method and device for transmitting signal with distributed aerial |
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| CN102082622A (en) * | 2009-11-27 | 2011-06-01 | 电子科技大学 | UL CoMP (Uplink Coordinated Multi-Point) efficient data merging method based on direct transmission after judgment |
| WO2014071620A1 (en) * | 2012-11-09 | 2014-05-15 | 华为技术有限公司 | Method for uplink softer handover, ue and base station |
| CN105356919A (en) * | 2015-11-25 | 2016-02-24 | 北京佰才邦技术有限公司 | Distributed antenna system, and distributed antenna signal processing method and apparatus |
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| WO2016149871A1 (en) * | 2015-03-20 | 2016-09-29 | 华为技术有限公司 | Receiving device and signal receiving processing method |
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| CN1162021C (en) * | 1999-06-01 | 2004-08-11 | 诺基亚公司 | Massage routing in case of multiple network subscription |
| US7505426B2 (en) * | 2000-12-29 | 2009-03-17 | Tropos Networks | Multi-channel mesh network |
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| WO2014071620A1 (en) * | 2012-11-09 | 2014-05-15 | 华为技术有限公司 | Method for uplink softer handover, ue and base station |
| CN104025651A (en) * | 2012-11-09 | 2014-09-03 | 华为技术有限公司 | Method for uplink softer handover, ue and base station |
| WO2016149871A1 (en) * | 2015-03-20 | 2016-09-29 | 华为技术有限公司 | Receiving device and signal receiving processing method |
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| CN105848188A (en) * | 2016-05-17 | 2016-08-10 | 协同通信技术有限公司 | Wireless network access method, system and device |
| CN112564795A (en) * | 2020-12-09 | 2021-03-26 | 中国计量大学 | MIMO-OSTBC parallel relay free space optical communication system and method based on GFDM |
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