CN102415167B - The method of allocation of downlink through-put power and corresponding device - Google Patents
The method of allocation of downlink through-put power and corresponding device Download PDFInfo
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- CN102415167B CN102415167B CN200980159102.5A CN200980159102A CN102415167B CN 102415167 B CN102415167 B CN 102415167B CN 200980159102 A CN200980159102 A CN 200980159102A CN 102415167 B CN102415167 B CN 102415167B
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- resource unit
- base station
- transmission
- via node
- user equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/46—TPC being performed in particular situations in multi hop networks, e.g. wireless relay networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes a kind of scheme for allocation of downlink through-put power in the cordless communication network with via node.A kind of method for allocation of downlink through-put power in the cordless communication network with via node, comprise the following steps: for for from base station to its via node RN of subordinate or the subframe of user equipment (UE) signal transmission, for the through-put power that different resource unit allocation is different.According to the present invention, can system interference level be reduced, and improved system performance.
Description
Technical field
The present invention relates to the communications field.More specifically, the present invention relates to the method for allocation of downlink through-put power in the cordless communication network with via node and corresponding base station.
Background technology
Relaying technique accept by the Long Term Evolution project LTE-Advanced of 3GPP (the 3rd Generation Partnership Project) and adopt, for forwarding service/signaling data between base station eNodeB and user equipment (UE), better cover or better throughput to obtain.Certainly, adopt via node RN can the covering of Extended Cell.But from the viewpoint of power system capacity, due to the loss of spectral efficiency on back haul link, can obtain advantage from relaying be also a problem.But the important feature that cellular network introduces relaying is AF panel.On some frequency spectrum resource, system can arrange via node RN send wireless signal and close base station eNodeB, because the transmitted power of via node RN is much smaller than the transmitted power of base station eNodeB, the interference of system will obtain suppression to a certain extent, thus the performance of raising system.At R1-091456 (" Initial evaluation of relay performanceon DL ", Qualcomm Europe, Seoul, March 2009) in, to propose for junction network by interference coordination technique to obtain the improvement of systematic function.
Summary of the invention
The present invention proposes a kind of scheme for allocation of downlink through-put power in the cordless communication network with via node.
According to a first aspect of the invention, propose a kind of method for allocation of downlink through-put power in the cordless communication network with via node, comprise step:
For for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission, for the through-put power that different resource unit allocation is different.
According to a second aspect of the invention, propose a kind of base station, comprising:
Power distributing unit, for for for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission, for the through-put power that different resource unit allocation is different.
According to a third aspect of the invention we, propose a kind of method, comprise step:
Based on the respective transmissions power information of respective resources unit received, correctly receive and demodulate from base station for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission.
According to a forth aspect of the invention, propose a kind of via node RN or user equipment (UE), comprising:
Receive and demodulate unit, for based on the respective transmissions power information of respective resources unit received, correctly receive and demodulate from base station for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission.
According to the present invention, can system interference level be reduced, and improved system performance.
Accompanying drawing explanation
By below in conjunction with the description of the drawings, and understand more comprehensively along with to of the present invention, other objects of the present invention and effect will become clearly and easy to understand, wherein:
Fig. 1 schematically shows the example of the environment that the present invention can implement wherein;
Fig. 2 shows the example of a subframe;
Fig. 3 shows the schematic diagram of the association of the UE based on received power;
Fig. 4 schematically shows the block diagram of the base station eNodeB according to an embodiment of the invention.
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment
Basic thought of the present invention is for for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission, for the through-put power that different resource unit allocation is different.
Fig. 1 schematically shows the example of the environment that the present invention can implement wherein.
As shown in Figure 1, this environment 100 comprises base station eNodeB 101 and belongs to via node RN 102, the user equipment (UE) 103 of this base station eNodeB 101, and belongs to the user equipment (UE) 104 of via node RN 102.
In the downstream direction, base station eNodeB 101 transmits CRS (cell specific reference signal), control signal and data-signal to via node RN 102, user equipment (UE) 103, and via node RN 102 transmits CRS (for Type II relaying, can not transmit CRS), control signal and data-signal to user equipment (UE) 104.
In the present invention, institute is it is of concern that how base station eNodeB 101 transmits CRS, control signal and data-signal to via node RN102, user equipment (UE) 103.
Wherein those skilled in the art will appreciate that CRS is for carrying out channel estimating, and control signal is used for controlling accordingly relaying node RN or user equipment (UE).
In addition, for simple object, merely illustrate a base station eNodeB 101 and the via node RN 102, the user equipment (UE) 103 that belong to this base station eNodeB 101 in FIG, and belong to the user equipment (UE) 104 of via node RN 102.But, those skilled in the art is to be understood that, base station eNodeB 101 can have more via node RN and user equipment (UE), and via node RN 102 also can have more user equipment (UE), or base station eNodeB 101 only has user equipment (UE) 103 or only has via node RN102.
In addition, although those skilled in the art will appreciate that below, base station eNodeB is adopted to describe embodiments of the present invention as the imbody of base station, the present invention is not limited to base station eNodeB.
When system cloud gray model, base station eNodeB 101 carries out scheduling and Resources allocation by according to used scheduling strategy (such as ratio justice or polling dispatching) to all via nodes in community and subscriber equipment (comprising RN102, UE103 and UE104).Like this, some subframes will be assigned to for from base station eNodeB 101 to the via node RN102 belonging to it or user equipment (UE) 103 signal transmission, and some other subframe will be used for from relaying node RN 102 to user equipment (UE) 104 signal transmission belonging to it.
In the present invention, for for from base station eNodeB 101 to the subframe of the via node RN102 belonging to it or user equipment (UE) 103 signal transmission, for the through-put power that different resource unit allocation is different.
Fig. 2 shows the example of a subframe, and this subframe is used for from base station eNodeB 101 to the via node RN102 belonging to it or user equipment (UE) 103 signal transmission.
As shown in Figure 2, this subframe 200 comprises 3 kinds of Resource Units:
(1) Resource Unit 201 for transmitting cell specific reference signal, is predefined as;
(2) Resource Unit 202 (it forms physical downlink control channel PDCCH) of transmission of control signals, is used for; Here only for PDCCH, in fact transmission of control signals also may comprise physical broadcast/Multicast Channel (PBCH, PMCH), Physical Control Format Indicator Channel (PCFICH) and Physical HARQ Indicator Channel (PHICH).
(3) Resource Unit 203 (its composition Physical Downlink Shared Channel PDSCH) of transmission of data signals, is used for;
In this execution mode of the present invention, for the Resource Unit be predefined as transmitting cell specific reference signal be used for the Resource Unit of transmission of control signals, distribute the first through-put power, and for being used for the Resource Unit of transmission of data signals, distribute the second through-put power, wherein the first through-put power is greater than the second through-put power.
Certainly, it will be appreciated by those skilled in the art that, for the Resource Unit be predefined as transmitting cell specific reference signal, be used for transmission of control signals Resource Unit and be used for the Resource Unit of transmission of data signals, different through-put powers can be distributed respectively.
In lte-a system, the ENERGY E PRE (through-put power) of each Resource Unit in base station eNodeB determination downlink transfer.Wherein, the transmission EPRE of descending cell specific reference signal is constant in all subframes and whole system bandwidth, and the downlink reference signal through-put power that its value provides according to high level is determined.
In the present invention, the transmission ERPE for the specific reference signal in descending community determined by base station eNodeB 101 is defined as high TX ERPEP
h(the first through-put power).
In addition, the transmission ERPE of transmission of control signals is used for also for high TX ERPEP
h.
In addition, base station eNodeB 101 introduces another transmission ERPEP
l(P
l≤ P
h), i.e. low TX ERPR (the second through-put power), for transmission of data signals.Ratio between low TX ERPE and high TX ERPE is
According to the present invention, due to for the Resource Unit be predefined as transmitting cell specific reference signal be used for the Resource Unit of transmission of control signals, distribute the first through-put power, and for being used for the Resource Unit of transmission of data signals, distribute the second through-put power, wherein the first through-put power is greater than the second through-put power, therefore not only can maintain the performance of covering and ensure the correctness of channel estimating, and reducing the interference to neighbor cell.
Correct Signal reception and demodulation can be carried out to make receiver side (user equipment (UE) 103 or via node RN102), the respective transmissions power information of respective resources unit, will by above broadcasting at PBCH (Physical Broadcast Channel) or transmit notifying user equipment UE103 or via node RN102 on PDCCH.
Such as, due to P
hto know in advance and always constant for UE103 or RN102, and P
lalways can change, therefore can only broadcast on PBCH or transmit ρ on PDCCH.
At P
lwhen being also always constant, also know P in advance at user equipment (UE) 103 or via node RN102
lwhen, just can not need the respective transmissions power information transmitting respective resources unit.
For those for from relaying node RN 102 to the subframe of user equipment (UE) 104 signal transmission belonging to it, for all Resource Units, transmission ERPE is P
n.
In the present invention, when UE execution network enters process, UE will be decided based on the 3rd through-put power and whether be associated with base station eNodeB or via node RN.This will cause more UE will be served by RN.
Fig. 3 shows the schematic diagram of the association of the UE based on received power.
In the cordless communication network with via node, their different synchronizing signals (usually being sent by base station eNodeB) are periodically broadcasted in different communities.User equipment (UE) 303 will select the community of the received power with maximum synchronizing signal as its Serving cell.According to this information, user equipment (UE) 303 will send random access lead code on Physical Random Access Channel PRACH.Base station eNodeB 301 in the serving cells and via node RN302 are by this lead code of reception.
Assuming that be P at the measurement power of the lead code of base station eNodeB 301 side joint receipts
1, and be P in via node RN302 side
2(the P that via node RN302 will measure it
2be reported to its upper-level BTS eNodeB301), so base station eNodeB 301 will according to determining that user equipment (UE) 303 should be associated with base station eNodeB 301 or via node RN 302 as follows:
If (P
1-P
2)>=(P
h-P
l), so user equipment (UE) 303 should be associated with base station eNodeB 301;
Otherwise user equipment (UE) 303 should be associated with via node RN302.
Here, the 3rd through-put power equals P
h-P
l.
And in the prior art, be according to P
1-P
2be greater than 0 or being less than 0 decides user equipment (UE) 303 and should be associated with base station eNodeB 301 or via node RN 302.
If P
1-P
2be greater than 0, so user equipment (UE) 303 should be associated with base station eNodeB 301;
Otherwise user equipment (UE) 303 should be associated with via node RN 302.
Certainly, it will be understood by those of skill in the art that the 3rd through-put power also can be other values, such as P
hor P
l, and need not to be P
h-P
l.
At receiver side via node RN or user equipment (UE), owing to knowing the respective transmissions power information of respective resources unit, therefore can correctly receive and demodulate come from base station eNodeB for from base station eNodeB to the subframe of the via node RN belonging to it or user equipment (UE) signal transmission.
Owing to reducing interference, aspects of which provide better systematic function.
The interference reduced comes from two aspects:
First, due to low TX ERPE transmission of data signals, the interference to neighbor cell will be reduced.Secondly, according to the present invention, more user equipment (UE) will be associated with via node RN, and therefore, it is quiet that base station eNodeB will have more chance, thus reduce the interference to neighbor cell further.
Fig. 4 schematically shows the block diagram of the base station eNodeB according to an embodiment of the invention.
As shown in Figure 4, base station eNodeB 400 comprises power distributing unit 410, for for the subframe of base station eNodeB 400 to the via node RN belonging to it or user equipment (UE) signal transmission, for the through-put power that different resource unit allocation is different.
One of them subframe has 3 kinds of different Resource Units:
Be predefined as the Resource Unit for transmitting cell specific reference signal;
Be used for the Resource Unit of transmission of control signals;
Be used for the Resource Unit of transmission of data signals;
Wherein, for the Resource Unit be predefined as transmitting cell specific reference signal be used for the Resource Unit of transmission of control signals, distribute the first through-put power, and for being used for the Resource Unit of transmission of data signals, distribute the second through-put power, wherein the first through-put power is greater than the second through-put power.
Base station eNodeB 400 also comprises notification unit 420, for the respective transmissions power to via node RN or user equipment (UE) notice respective resources unit.
Base station eNodeB 400 also comprises determining means 430, for according to the 3rd through-put power, decides user equipment (UE) and should be associated with base station eNodeB and still should be associated with via node RN.
Comprise according to via node RN of the present invention or user equipment (UE) and receive and demodulate unit, for based on the respective transmissions power information of respective resources unit received, correctly receive and demodulate come from base station eNodeB for from base station eNodeB to the subframe of the via node RN belonging to it or user equipment (UE) signal transmission.
Following table shows parameter and value thereof that emulation uses, and relative to the advantage of existing techniques in realizing.Table 1 gives the parameter and value thereof that emulation uses.Table 2 gives the advantage relative to existing techniques in realizing.
Table 1:
Table 2 (relative to for all Resource Units, all using the situation of same power 46dBm)
It should be noted that to make the present invention be easier to understand, description above eliminates to be known for a person skilled in the art and may to be required some ins and outs more specifically for realization of the present invention.
There is provided the object of specification of the present invention to be to illustrate and describing, instead of be used for exhaustive or limit the invention to disclosed form.For those of ordinary skill in the art, many modifications and changes are all apparent.
Therefore; selecting and describing execution mode is to explain principle of the present invention and practical application thereof better; and those of ordinary skill in the art are understood, under the prerequisite not departing from essence of the present invention, all modifications and change all fall within protection scope of the present invention defined by the claims.
Claims (11)
1., for a method for allocation of downlink through-put power in the cordless communication network with via node, comprise step:
For for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission, for the through-put power that different types of resource unit allocation is different;
Wherein said subframe has 3 kinds of different Resource Units:
Be predefined as the Resource Unit for transmitting cell specific reference signal;
Be used for the Resource Unit of transmission of control signals;
Be used for the Resource Unit of transmission of data signals.
2. method according to claim 1,
Wherein for the Resource Unit be predefined as transmitting cell specific reference signal be used for the Resource Unit of transmission of control signals, distribute the first through-put power, and for being used for the Resource Unit of transmission of data signals, distribute the second through-put power, wherein the first through-put power is greater than the second through-put power.
3. method according to claim 1, also comprises:
The respective transmissions power of respective resources unit is notified to via node RN or user equipment (UE).
4. method according to claim 1, also comprises:
According to the 3rd through-put power, decide user equipment (UE) and should be associated with base station and still should be associated with via node RN.
5. a base station, comprising:
Power distributing unit, for for for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission, for the through-put power that different types of resource unit allocation is different,
Wherein said subframe has 3 kinds of different Resource Units:
Be predefined as the Resource Unit for transmitting cell specific reference signal;
Be used for the Resource Unit of transmission of control signals;
Be used for the Resource Unit of transmission of data signals.
6. base station according to claim 5,
Wherein for the Resource Unit be predefined as transmitting cell specific reference signal be used for the Resource Unit of transmission of control signals, distribute the first through-put power, and for being used for the Resource Unit of transmission of data signals, distribute the second through-put power, wherein the first through-put power is greater than the second through-put power.
7. base station according to claim 5, also comprises:
Notification unit, for the respective transmissions power to via node RN or user equipment (UE) notice respective resources unit.
8. base station according to claim 5, also comprises:
Determining means, for according to the 3rd through-put power, decides user equipment (UE) and should be associated with base station and still should be associated with via node RN.
9. a method, comprises step:
Based on the respective transmissions power information of corresponding species resource unit received, correctly receive and demodulate from base station for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission;
Wherein said corresponding species resource unit is one of 3 kinds of different Resource Units:
Be predefined as the Resource Unit for transmitting cell specific reference signal;
Be used for the Resource Unit of transmission of control signals;
Be used for the Resource Unit of transmission of data signals.
10. a via node RN, comprising:
Receive and demodulate unit, for based on the respective transmissions power information of corresponding species resource unit received, correctly receive and demodulate from base station for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission;
Wherein said corresponding species resource unit is one of 3 kinds of different Resource Units:
Be predefined as the Resource Unit for transmitting cell specific reference signal;
Be used for the Resource Unit of transmission of control signals;
Be used for the Resource Unit of transmission of data signals.
11. 1 kinds of user equipment (UE)s, comprising:
Receive and demodulate unit, for based on the respective transmissions power information of corresponding species resource unit received, correctly receive and demodulate from base station for the subframe from base station to the via node RN belonging to it or user equipment (UE) signal transmission;
Wherein said corresponding species resource unit is one of 3 kinds of different Resource Units:
Be predefined as the Resource Unit for transmitting cell specific reference signal;
Be used for the Resource Unit of transmission of control signals;
Be used for the Resource Unit of transmission of data signals.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/000948 WO2011020217A1 (en) | 2009-08-18 | 2009-08-18 | Method for assigning downlink transmission power and apparatus thereof |
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|---|---|
| CN102415167A CN102415167A (en) | 2012-04-11 |
| CN102415167B true CN102415167B (en) | 2015-10-07 |
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| WO (1) | WO2011020217A1 (en) |
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| CN103298088A (en) * | 2012-02-24 | 2013-09-11 | 电信科学技术研究院 | Resource scheduling method and device |
| CN108235417B (en) * | 2016-12-22 | 2021-03-30 | 华为技术有限公司 | Downlink transmission method, base station and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137091A (en) * | 2006-08-31 | 2008-03-05 | 富士通株式会社 | Re-transmission control method and relay station apparatus in a relay communication system |
| CN101170351A (en) * | 2006-10-23 | 2008-04-30 | 株式会社Ntt都科摩 | Data transmission method |
| CN101394253A (en) * | 2008-10-21 | 2009-03-25 | 西安电子科技大学 | Optimized power allocation method reducing interruption rate in encoded collaboration communication |
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| KR100684167B1 (en) * | 2005-12-08 | 2007-02-20 | 한국전자통신연구원 | Periodic media reservation time method for periodic qos data in wlan |
| KR100740911B1 (en) * | 2006-09-20 | 2007-07-19 | 포스데이타 주식회사 | Method and apparatus for assigning down link power in wireless communication system |
| CN100548071C (en) * | 2007-09-18 | 2009-10-07 | 北京邮电大学 | Multi-frequency point TD-SCDMA group network and realization of Communication method based on relaying technique |
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- 2009-08-18 WO PCT/CN2009/000948 patent/WO2011020217A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137091A (en) * | 2006-08-31 | 2008-03-05 | 富士通株式会社 | Re-transmission control method and relay station apparatus in a relay communication system |
| CN101170351A (en) * | 2006-10-23 | 2008-04-30 | 株式会社Ntt都科摩 | Data transmission method |
| CN101394253A (en) * | 2008-10-21 | 2009-03-25 | 西安电子科技大学 | Optimized power allocation method reducing interruption rate in encoded collaboration communication |
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| WO2011020217A1 (en) | 2011-02-24 |
| CN102415167A (en) | 2012-04-11 |
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