CN101990301A - Diversity receiving system and method under multi-carrier network - Google Patents
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Abstract
The invention provides a diversity receiving system and a diversity receiving method under a multi-carrier network. The method comprises that: a service base station and a cooperative base station of a user receive signals transmitted by the user; the cooperative base station sends the received signals to the service base station; and the service base station combines the received paths of signals and demodulates the signals. By the system and the method, through beneficial characteristics of realizing cooperative diversity reception of different cells, avoiding inter-cell interference and improving spectrum utilization efficiency and edge spectrum utilization efficiency of the system, the signal receiving quality is effectively improved under the condition of a different frequency network; besides, in the scheme, new signaling and control signals are not needed to be uploaded, and an over-the-air transmission protocol is not needed to be modified at all; in addition, in the scheme, one kind of receiver structure is only needed, different receivers realize frequency reuse by adopting a scheduling mode, soft configuration can be implemented according to requirements, and the invention has the characteristics that the system and the method are easy to implement and the like.
Description
Technical field
The present invention relates to the communications field, be specifically related to diversity system and method under a kind of multi-carrier networking.
Background technology
The data transfer rate that existing cell mobile communication systems (as the 3G system) provides has very big difference at center of housing estate and cell edge, not only influence the capacity of whole system, and the service quality that the user is obtained at diverse location has very great fluctuation process.Therefore, the new generation broadband wireless communication system of studying at present all coincidentally will improve cell-edge performance as one of main demand parameter.
(Inter-Cell Interference ICI) is an intrinsic problem of cell mobile communication systems to presence of intercell interference, and traditional solution is to adopt channeling, and multiplexing coefficient has several specific selections, as 1,3,7 etc.Multiplexing coefficient is 1 o'clock, and neighbor cell all uses identical frequency resource, and is at this moment very serious in the interference of cell edge.Lower multiplexing coefficient (3 or 7) can effectively suppress ICI, but spectrum efficiency is reduced to 1/3 or 1/7.
Summary of the invention
The technical problem to be solved in the present invention provides diversity system and the method under a kind of multi-carrier networking, can suppress presence of intercell interference, has improved the spectrum utilization efficiency and the edge spectrum utilization efficiency of system.
In order to address the above problem, the invention provides the diversity receiving method under a kind of multi-carrier networking, comprise: user's serving BS and cooperative base station all receive the signal of described user's emission, described cooperative base station is sent to serving BS with the signal that receives, and carries out demodulation after each road signal that described serving BS will receive merges.
Further, described serving BS detects at disturbed condition on its working frequency range and described user the channel response on its working frequency range, and carries out rate prediction and resource allocation according to described disturbed condition and channel response.
Further, described cooperative base station detects at disturbed condition on the working frequency range of serving BS and described user the channel response on the working frequency range at serving BS, and described disturbed condition and channel response fed back to serving BS, described serving BS carries out rate prediction and resource allocation according to the channel response and the disturbed condition of serving BS and cooperative base station detection.
Further, described each road signal is merged is meant, the signal of described user's emission that the signal that the described user that described serving BS receives serving BS launches and each cooperative base station receive merges by maximum ratio.
Further, described user is according to the pilot signal measurement of each base station path loss to each base station, and with the base station of path loss minimum as its serving BS;
Described serving BS selects path loss to be less than or equal to the cooperative base station of the base station of path loss threshold value as this user.
The present invention also provides the diversity system under a kind of multi-carrier networking, and described system comprises user, serving BS and cooperative base station;
Described cooperative base station is used to receive the signal of described user's emission, and the signal that receives is sent to described serving BS;
Described serving BS is used to receive the signal of described user's emission, and receives behind the signal that cooperative base station sends and to carry out demodulation after each road signal merged.
Further, described serving BS also is used to detect disturbed condition and the channel response of described user on its working frequency range on its working frequency range, and according to the channel response and the disturbed condition that detect, carries out rate prediction and resource allocation.
Further, described cooperative base station also is used to detect the channel response on the working frequency range at serving BS at disturbed condition on the working frequency range of serving BS and described user, and described disturbed condition and channel response are fed back to serving BS;
Described serving BS also is used to detect disturbed condition and the channel response of described user on its working frequency range on its working frequency range, and, carry out rate prediction and resource allocation according to the channel response and the disturbed condition of described serving BS according to serving BS and cooperative base station detection.
Further, described serving BS merges each road signal and is meant, the signal of described user's emission that serving BS receives serving BS and the signal of described user's emission that each cooperative base station receives merge by maximum ratio.
Further, described user also is used for according to the pilot signal measurement of each base station path loss to each base station, and with the base station of path loss minimum as its serving BS;
Described serving BS also is used to select path loss to be less than or equal to the cooperative base station of the base station of path loss threshold value as described user.
In sum, the invention provides diversity system and method under a kind of multi-carrier networking, collaboration diversity by different districts receives, and avoid presence of intercell interference, therefore the beneficial characteristics of the spectrum utilization efficiency of raising system and edge spectrum utilization efficiency can effectively improve signal receiving quality under the situation of inter-frequency networking; And this programme need not to load new signaling and control signal, need not aerial host-host protocol is carried out any modification, in addition, this programme only needs a kind of receiver structure, different receivers adopts the mode of scheduling to realize channeling, can implement soft configuration as requested, possesses the characteristics such as simple that realize.
Description of drawings
Fig. 1 is that a kind of typical channeling is 3 plot planning schematic diagram;
Fig. 2 is that multicarrier system is 3 o'clock subcarrier allocation figure at channeling;
Fig. 3 is a system configuration schematic diagram of the present invention;
Fig. 4 is the inventive method flow chart;
Fig. 5 is existing multiplex mode and the present invention program's a scheduling SINR comparison diagram;
Fig. 6 is existing multiplex mode and the present invention program's a UE average throughput comparison diagram.
Embodiment
The invention provides diversity system and method under a kind of multi-carrier networking, user's serving BS and cooperative base station all receive the signal of this user's emission, cooperative base station is sent to serving BS with the signal that receives, and carries out demodulation after each road signal that serving BS will receive merges.
Present embodiment provides the diversity system under a kind of multi-carrier networking, as shown in Figure 3, comprises serving BS, one or more cooperative base station and user;
Cooperative base station is used to receive the signal of user's emission, and the signal that receives is sent to serving BS;
Serving BS is used to receive the signal of user's emission, and receives behind the signal that cooperative base station sends and to carry out demodulation after each road signal merged.
Cooperative base station also is used to detect the channel response on the working frequency range at serving BS at disturbed condition on the working frequency range of serving BS and user, and disturbed condition and channel response are fed back to serving BS;
Serving BS also is used to detect disturbed condition and the channel response of described user on its working frequency range on its working frequency range, and according to the channel response and the disturbed condition that detect, carry out rate prediction and resource allocation, perhaps, according to channel response and the disturbed condition of serving BS, carry out rate prediction and resource allocation according to serving BS and cooperative base station detection.
Serving BS also is used to select path loss to be less than or equal to the cooperative base station of the base station of path loss threshold value as this user, and has selected to notify selected each base station as cooperative base station after user's the cooperative base station, and carries user ID.
Serving BS merges each road signal and is meant, the signal of user's emission that serving BS receives serving BS and the signal of user's emission that each cooperative base station receives merge by maximum ratio.
The schedule information emission data that the user is used for issuing according to serving BS also are used for according to the pilot signal measurement of each base station path loss to each base station, and with the base station of path loss minimum as its serving BS.
The receiver of all base stations all has identical receiver structure and working frequency range, realizes simple; And system is a synchro system, realizes receiving and sending messages synchronously in all base stations.
Present embodiment provides the diversity receiving method under a kind of multi-carrier networking, as shown in Figure 4, may further comprise the steps:
When scheduling, the frequency duplex factor as one N that adopts during according to frequency planning is split as N alien frequencies part with the multicarrier system frequency range, and serving BS is only implemented scheduling in its frequency range that is assigned to; Can but be not limited to the multicarrier system frequency range is divided into the N five equilibrium;
Step 401: serving BS and the cooperative base station of determining certain UE in the sub-district;
The serving BS of determining UE is meant, UE is according to the pilot signal measurement of each base station path loss to each base station, and with the base station of path loss minimum as its serving BS; The cooperative base station of determining UE is meant, serving BS is selected the cooperative base station of one or more base stations as this UE according to UE to the path loss of each base station, can be the threshold value that a path loss is set, serving BS selects path loss to be less than or equal to the cooperative base station of the base station of this threshold value as this UE;
Serving BS knows that UE to the mode of the path loss of each base station can be, for receiving the base station that this UE transmits, this UE of Sounding signal testing that sends according to UE arrives its antenna port path loss, and the path loss of test is sent to the serving BS of this UE, perhaps, UE is according to the pilot signal measurement of each base station path loss to each base station, and the path loss of measuring is sent to serving BS;
Serving BS is notified selected each base station as cooperative base station after the cooperative base station of having selected UE, and carries user ID.
Step 402: serving BS detects disturbed condition on its working frequency range and UE at the channel response of this serving BS on working frequency range, and carry out rate prediction and resource allocation according to the disturbed condition and the channel response that detect, and, can adopt PF equity dispatching mode during resource allocation to UE enforcement scheduling;
In this step, each cooperative base station also detects disturbed condition on the working frequency range of serving BS and UE at the channel response of this serving BS on working frequency range, and disturbed condition and the channel response that detects fed back to serving BS, disturbed condition, channel response that the disturbed condition that serving BS then detects according to each cooperative base station, channel response and serving BS detect carry out rate prediction and resource allocation;
Modes such as each cooperative base station can adopt multiple mode to realize that the disturbed condition and the channel response that will detect feed back to serving BS during concrete enforcement, and for example cable transmission, NodeB be shared;
The schedule information emission data that step 403:UE issues according to serving BS;
Step 404: serving BS and cooperative base station receive the signal of UE emission, and cooperative base station transmission received signal is to serving BS, and demodulation is implemented in the assistance services base station.Modes such as each cooperative base station can adopt multiple mode to realize that the signal that will receive transfers to serving BS during concrete enforcement, and for example cable transmission, NodeB be shared.
Step 405: serving BS merges the demodulation of back enforcement to signal with each road signal (comprising the signal of serving BS reception and the signal that each cooperative base station receives).
During merging can but the mode that is not limited to adopt maximum ratio to merge, promptly the best proportion of signal is big more.
Below further specify the present invention program by application example
Provided 7 websites, 3 set of sectors specific embodiments off the net below in standard; Actual networking situation is comparatively complicated, as long as but have the inter-frequency networking of multicarrier system, this scheme just can be suitable for, so this programme includes but not limited to embodiment given below.
Application example one, different districts when networking, the rate prediction of cooperating, scheduling of resource and diversity reception, implementation step is:
(1) sub-district is according to 7 websites, 3 sectors, 21 sub-districts mode networking of standard, and multicarrier system adopts the mode of alien frequencies synchronous network to carry out, and channeling is 3, realizes receiving and sending messages synchronously in all base stations; Its networking parameter is as shown in table 1:
Table 1: should use each parameter configuration in the example
(2) for the UE1 among the A of sub-district determines serving BS and cooperative base station, its serving BS is serving BS A, and the cooperative base station of establishing selection is cooperative base station B, cooperative base station C, cooperative base station D;
(3) supposition serving BS A is operated in frequency range 1, serving BS A detects its channel response on frequency range 1 that is operated in the disturbed condition on the frequency range 1 and treats UE1 at serving BS A, each cooperative base station (being cooperative base station B, cooperative base station C and cooperative base station D) also detects its channel response on frequency range 1 that is operated in the disturbed condition on the frequency range 1 and treats UE1 at serving BS A, and disturbed condition and channel response are fed back to serving BS A;
(4) serving BS carries out rate prediction and resource allocation according to the disturbed condition and the channel response of UE1 on this frequency range 1 at working frequency range 1 of each base station (comprising serving BS and each cooperative base station) detection, and UE is implemented scheduling;
(5) cooperative base station B, cooperative base station C, cooperative base station D implement to receive to the signal of UE1, and the transmission received signal arrives serving BS A, the enforcement demodulation of assistance services base station.Because cooperative base station B, cooperative base station C, cooperative base station D and Serving cell A are inter-frequency networking, so can't exert an influence each other;
(6) serving BS A merges the signal that serving BS A, cooperative base station B, cooperative base station C and cooperative base station D detect, and implements the demodulation to signal afterwards.
The mode that can adopt maximum ratio to merge during merging, promptly the best proportion of signal is big more.
Fig. 5 has provided scheduling SINR (Signal-to-Interference and Noise Ratio under the multiplex mode that adopts existing multiplex mode and should use example, signal disturbs and noise ratio) comparison diagram, be scheduling SINR distribution map under the existing multiplex mode shown in the dotted line wherein, shown in the solid line is the scheduling SINR distribution map that should use under the multiplex mode of example, as can be seen from the figure, adopt this programme can largely improve the performance of scheduling SINR, therefore can improve the availability of frequency spectrum largely;
Fig. 6 has provided and has adopted existing multiplex mode and the UE average throughput comparison diagram that should use under the multiplex mode of example, be UE average throughput distribution map under the existing multiplex mode shown in the dotted line wherein, shown in the solid line is the UE average throughput distribution map that should use under the multiplex mode of example, as can be seen from the figure adopt the multiplex mode of this programme, improved the UE average throughput largely.
Table 2 item has provided under the different station spacings, should have the lifting effect of multiplex mode on the availability of frequency spectrum and the cell edge availability of frequency spectrum relatively now with example, as can be seen, no matter station spacing how, the scheme of application example one existing relatively scheme on the availability of frequency spectrum and the cell edge availability of frequency spectrum all has very big lifting.
Table 2: the main simulation result of existing multiplex mode and application example one:
Application example two, consider between the different base station if by cable transmission message, transmission delay may cause in time implementing rate prediction, and this programme can be only carries out the diversity scheduling of resource according to the channel response and the disturbed condition of serving BS, and concrete implementation step is:
(1) sub-district is according to 7 websites, 3 sectors, 21 sub-districts mode networking of standard, and multicarrier system adopts the mode of alien frequencies synchronous network to carry out, and channeling is 3, realizes receiving and sending messages synchronously in all base stations; Its networking parameter such as application example one;
(2) for the UE1 among the A of sub-district determines serving BS and cooperative base station, its serving BS is serving BS A, and the cooperative base station of establishing selection is cooperative base station B, cooperative base station C, cooperative base station D;
(3) serving BS A detects its disturbed condition on working frequency range 1 and UE1 at the channel response of this serving BS on working frequency range, and carry out rate prediction and resource allocation according to the disturbed condition and the channel response that detect, and, can adopt PF equity dispatching mode during resource allocation to UE enforcement scheduling;
(4) cooperative base station B, cooperative base station C, cooperative base station D implement to receive to the UE signal of Serving cell A, and transmit received signal to serving BS A, and assistance services base station A implements demodulation.Because cooperative base station B, cooperative base station C, cooperative base station D and Serving cell A are inter-frequency networking, so can't exert an influence each other;
(5) serving BS A merges the signal that serving BS A, cooperative base station B, cooperative base station C and cooperative base station D detect, and implements the demodulation to signal afterwards.
The mode that can adopt maximum ratio to merge during merging.
Table 3 has provided under the different station spacings, the existing relatively lifting effect of multiplex mode on the availability of frequency spectrum and the cell edge availability of frequency spectrum of application example two, as can be seen, no matter station spacing how, the scheme of application example two existing relatively scheme on the availability of frequency spectrum and the cell edge availability of frequency spectrum all has very big lifting.
Table 3: the main simulation result of existing multiplex mode and application example two:
It is 3 plot planning schematic diagram that Fig. 1 has provided a kind of typical channeling.It is the subcarrier allocation figure that can call in 3 o'clock at channeling that Fig. 2 has provided multicarrier system.From Fig. 1 and Fig. 2 as can be seen, the signal that UE1 sends can be received by the service antenna of sub-district A, and simultaneously, neighbor cell B and C can receive the signal that UE1 sends equally, and this signal can normally be received, and can not form the service UE of sub-district B and C and disturb.In like manner, the signal that UE2 sends not only can be received by the service antenna of sub-district A, and simultaneously, neighbor cell D and E can receive the signal that UE2 sends equally, can not form the service UE of sub-district D and E and disturb.At this moment, sub-district B, C, D, E can become the cooperation cell of sub-district A, can improve the quality of received signal.
From simulation result, as can be seen,, can under the situation of not obvious increase presence of intercell interference, improve the spectrum utilization efficiency of system and the beneficial characteristics of edge spectrum utilization efficiency with the cooperation multiplex mode.This cooperation mode is particularly useful for the densely inhabited district that station spacing is nearer, interference is bigger.Simultaneously, this programme also has and need not in the air to load new signaling and control signal, need not aerial host-host protocol is carried out any modification, realizes characteristics such as simple.This programme only needs a kind of receiver structure, and different receivers adopts the mode of scheduling to realize channeling, can implement soft configuration as requested, possesses the characteristics such as simple that realize.
Claims (10)
1. the diversity receiving method under the multi-carrier networking, comprise: user's serving BS and cooperative base station all receive the signal of described user's emission, described cooperative base station is sent to serving BS with the signal that receives, and carries out demodulation after each road signal that described serving BS will receive merges.
2. the method for claim 1 is characterized in that, described method also comprises:
Described serving BS detects at disturbed condition on its working frequency range and described user the channel response on its working frequency range, and carries out rate prediction and resource allocation according to described disturbed condition and channel response.
3. the method for claim 1 is characterized in that, described method also comprises:
Described cooperative base station detects at disturbed condition on the working frequency range of serving BS and described user the channel response on the working frequency range at serving BS, and described disturbed condition and channel response fed back to serving BS, described serving BS carries out rate prediction and resource allocation according to the channel response and the disturbed condition of serving BS and cooperative base station detection.
4. the method for claim 1 is characterized in that:
Described each road signal is merged is meant, the signal of described user's emission that the signal that the described user that described serving BS receives serving BS launches and each cooperative base station receive merges by maximum ratio.
5. the method for claim 1 is characterized in that, described method also comprises:
Described user is according to the pilot signal measurement of each base station path loss to each base station, and with the base station of path loss minimum as its serving BS;
Described serving BS selects path loss to be less than or equal to the cooperative base station of the base station of path loss threshold value as this user.
6. the diversity system under the multi-carrier networking, it is characterized in that: described system comprises user, serving BS and cooperative base station;
Described cooperative base station is used to receive the signal of described user's emission, and the signal that receives is sent to described serving BS;
Described serving BS is used to receive the signal of described user's emission, and receives behind the signal that cooperative base station sends and to carry out demodulation after each road signal merged.
7. system as claimed in claim 6 is characterized in that:
Described serving BS also is used to detect disturbed condition and the channel response of described user on its working frequency range on its working frequency range, and according to the channel response and the disturbed condition that detect, carries out rate prediction and resource allocation.
8. system as claimed in claim 6 is characterized in that:
Described cooperative base station also is used to detect the channel response on the working frequency range at serving BS at disturbed condition on the working frequency range of serving BS and described user, and described disturbed condition and channel response are fed back to serving BS;
Described serving BS also is used to detect disturbed condition and the channel response of described user on its working frequency range on its working frequency range, and, carry out rate prediction and resource allocation according to the channel response and the disturbed condition of described serving BS according to serving BS and cooperative base station detection.
9. system as claimed in claim 6 is characterized in that:
Described serving BS merges each road signal and is meant, the signal of described user's emission that serving BS receives serving BS and the signal of described user's emission that each cooperative base station receives merge by maximum ratio.
10. system as claimed in claim 6 is characterized in that:
Described user also is used for according to the pilot signal measurement of each base station path loss to each base station, and with the base station of path loss minimum as its serving BS;
Described serving BS also is used to select path loss to be less than or equal to the cooperative base station of the base station of path loss threshold value as described user.
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| CN102204116A (en) * | 2011-05-20 | 2011-09-28 | 华为技术有限公司 | Data merging method, service base station, collaboration base station and system |
| CN102957450A (en) * | 2011-08-26 | 2013-03-06 | 华为技术有限公司 | Method and device for improving network quality, wireless network controller and chip |
| CN102958115A (en) * | 2011-08-30 | 2013-03-06 | 中兴通讯股份有限公司 | Signal processing method and device |
| CN103747487A (en) * | 2013-12-30 | 2014-04-23 | 大唐移动通信设备有限公司 | Upstream data processing method and device in CoMP (Coordinated Multiple Points) system |
| CN106664589A (en) * | 2014-07-22 | 2017-05-10 | 高通股份有限公司 | Ultra reliable link design |
| US10972925B2 (en) | 2014-07-22 | 2021-04-06 | Qualcomm Incorporated | Ultra reliable link design |
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| CN103747487A (en) * | 2013-12-30 | 2014-04-23 | 大唐移动通信设备有限公司 | Upstream data processing method and device in CoMP (Coordinated Multiple Points) system |
| CN106664589A (en) * | 2014-07-22 | 2017-05-10 | 高通股份有限公司 | Ultra reliable link design |
| CN106664589B (en) * | 2014-07-22 | 2020-06-09 | 高通股份有限公司 | Method and apparatus for ultra-reliable link design |
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