CN103002447A - Uplink interference elimination method - Google Patents
Uplink interference elimination method Download PDFInfo
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- CN103002447A CN103002447A CN 201110276349 CN201110276349A CN103002447A CN 103002447 A CN103002447 A CN 103002447A CN 201110276349 CN201110276349 CN 201110276349 CN 201110276349 A CN201110276349 A CN 201110276349A CN 103002447 A CN103002447 A CN 103002447A
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- frequency spectrum
- rru
- data
- spectrum resource
- uplink interference
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Abstract
The invention discloses an uplink interference elimination method. The method includes: UE (user equipment) transmits data on spectrum resources to RRUs (radio remote units); and the RRUs only receive the data on the spectrum resources of the UE. By applying the uplink interference elimination method, interference among multiple uplink terminals is avoided, and receptivity is improved.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to a kind of uplink interference removing method.
Background technology
Need the application distribution antenna in communication system, for example high-speed railways adopts spaced antenna to enlarge the scope of residential quarter in order to solve the problem of frequent switching.Distributing antenna system adopts the network configuration of baseband processing unit (BBU)+Remote Radio Unit (RRU) to merge to realize many residential quarters.A BBU can send by a plurality of RRU the data of data or receiving terminal transmission to terminal (UE).
In distributing antenna system, because UE is different to the distance of a plurality of RRU, so asynchronism(-nization) of UE Electromagnetic Wave Propagation in the RRU the transmission of data process, it is also different that each RRU receives the time of signal, it is different then to go up line delay, has caused the signal of multiple terminals can not arrive simultaneously the base station.Referring to accompanying drawing 1, terminal A is different to the distance of RRU1 from terminal B to the distance of RRU1; The distance of terminal A to the distance of RRU2 and terminal B to RRU2 also is different.
The upward signal of multiple terminals in the LTE system owing to adopted single-carrier frequency division multiple access (SC-FDMA), requires the uplink signal synchronization of a plurality of terminals to arrive.And in the LTE system, use spaced antenna, terminal is different from the distance of each RRU, can't adjust the time advance value (TA) of UE, just can't guarantee that the upper multi-user data that receives of RRU can be synchronous, thereby causes the interference between up multiple terminals.
Summary of the invention
The embodiment of the invention proposes a kind of uplink interference removing method, avoids the interference between up multiple terminals, improves receptivity.
The technical scheme of the embodiment of the invention is as follows:
A kind of uplink interference removing method, the method comprises:
Terminal UE on frequency spectrum resource to the radio frequency remote unit RRU the transmission of data;
RRU only receives the data on the frequency spectrum resource of UE place.
Described frequency spectrum resource sets in advance fixing.
Described frequency spectrum resource comprises the frequency spectrum resource of the position different frequency range that varies in size.
Described UE was further comprising before the RRU the transmission of data on the frequency spectrum resource: frequency range is distributed for UE in the base station in described frequency spectrum resource.
The data that described RRU only receives on the frequency spectrum resource of UE place comprise: RRU carries out filtering according to UE place frequency spectrum resource to the data that receive, and RRU only receives the data on the frequency spectrum resource of UE place.
Described method is applied to distributed system.
Described method is applied to non-distributed system.
For different UE different described frequency spectrum resources is set.
Can find out that from technique scheme in embodiments of the present invention, to the RRU the transmission of data, RRU only receives the data on the frequency spectrum resource of UE place to UE on frequency spectrum resource.The signal distinguishing of different UEs is come, thereby it is upper because the asynchronous interference that brings of different UEs has further improved receptivity to have eliminated RRU.
Description of drawings
Fig. 1 be different terminals arrive different RRUs apart from schematic diagram;
Fig. 2 is embodiment of the invention uplink interference removing method schematic flow sheet;
Fig. 3 is embodiment of the invention RRU data receiver handling process schematic diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In embodiments of the present invention, to the RRU the transmission of data, RRU only receives the data on the frequency spectrum resource of UE place to UE on frequency spectrum resource.Come by the signal distinguishing of different frequency spectrum resources with different UEs, thereby it is upper because the asynchronous interference that brings of different UEs has further improved receptivity to have eliminated RRU.Technical scheme of the present invention is not only applicable to distributed system, can distinguish by different frequency spectrum resources the signal of UE in non-distributed system yet.
Are uplink interference removing method schematic flow sheets referring to accompanying drawing 2, specifically may further comprise the steps:
UE is setting in advance on the fixing frequency spectrum resource to the RRU the transmission of data.RRU just can receive the data that UE sends at fixing frequency spectrum resource like this.Wherein, for different UE different frequency spectrum resources is set.
Also can be, fix in advance several sizes frequency range different with the position, then the base station be selected the frequency range of suitable size and position as required for UE, and selected frequency spectrum resource is informed RRU, and its distribution method is frequency selection technology of the prior art.Same, RRU receives the data that UE sends at the frequency spectrum resource that UE distributes.
RRU only receives the data on the frequency spectrum resource of UE place, only is received in data on the corresponding frequency spectrum resource for a RRU.The data that RRU only receives on the frequency spectrum resource of UE place have various ways, for example RRU carries out filtering according to UE place frequency spectrum resource to the data that receive, filtering other data except the data that UE sends, owing to for different UE different frequency spectrum resources is set, RRU only receives the data on the frequency spectrum resource of corresponding UE place like this.
Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing 3.It is UE1 and UE2 that two users are arranged in accompanying drawing 2, four RRU, i.e. RRU1, RRU2, RRU3 and RRU4.
UE1 sends data to all RRU.RRU1 carries out the UE1 signal filtering to the received signal on the frequency spectrum of UE1 place, fast fourier transform (FFT) is separated resource mapping, and balanced and inverse Fourier transform (IDFT) obtains the data that UE1 sends.Accordingly, RRU1 carries out the UE2 signal filtering to the received signal on the frequency spectrum of UE2 place, obtains the data that UE2 sends through same process.
For each RRU, obtain the data that two users of UE1 and UE2 send.The data that the UE1 that each RRU is obtained sends merge, and obtain the data that UE1 sends after demodulation, descrambling and the decoding.The data that the UE2 that each RRU is obtained sends merge, and obtain the data that UE2 sends after demodulation, descrambling and the decoding.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. uplink interference removing method is characterized in that the method comprises:
Terminal UE on frequency spectrum resource to the radio frequency remote unit RRU the transmission of data;
RRU only receives the data on the frequency spectrum resource of UE place.
2. uplink interference removing method according to claim 1 is characterized in that described frequency spectrum resource sets in advance fixing.
3. uplink interference removing method according to claim 1 is characterized in that described frequency spectrum resource comprises the frequency spectrum resource of the position different frequency range that varies in size.
4. uplink interference removing method according to claim 3, it is characterized in that described UE was further comprising before the RRU the transmission of data on the frequency spectrum resource: the base station is that UE distributes frequency range in described frequency spectrum resource.
5. uplink interference removing method according to claim 1, it is characterized in that, the data that described RRU only receives on the frequency spectrum resource of UE place comprise: RRU carries out filtering according to UE place frequency spectrum resource to the data that receive, and RRU only receives the data on the frequency spectrum resource of UE place.
6. uplink interference removing method according to claim 1 is characterized in that described method is applied to distributed system.
7. uplink interference removing method according to claim 1 is characterized in that described method is applied to non-distributed system.
8. uplink interference removing method according to claim 1 is characterized in that, for different UE different described frequency spectrum resources is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110276349 CN103002447A (en) | 2011-09-16 | 2011-09-16 | Uplink interference elimination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110276349 CN103002447A (en) | 2011-09-16 | 2011-09-16 | Uplink interference elimination method |
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| CN103002447A true CN103002447A (en) | 2013-03-27 |
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| CN 201110276349 Pending CN103002447A (en) | 2011-09-16 | 2011-09-16 | Uplink interference elimination method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980382A (en) * | 2015-06-29 | 2015-10-14 | 上海华为技术有限公司 | Data processing method and apparatus of multiple cell-shared radio remote units (RRU) |
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2011
- 2011-09-16 CN CN 201110276349 patent/CN103002447A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980382A (en) * | 2015-06-29 | 2015-10-14 | 上海华为技术有限公司 | Data processing method and apparatus of multiple cell-shared radio remote units (RRU) |
| CN104980382B (en) * | 2015-06-29 | 2018-10-30 | 上海华为技术有限公司 | A kind of data processing method and device of multiple RRU of cell altogether |
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