CN104796975B - One of dense deployment scene descending self-adapting power regulation mode - Google Patents

One of dense deployment scene descending self-adapting power regulation mode Download PDF

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Publication number
CN104796975B
CN104796975B CN201510178316.4A CN201510178316A CN104796975B CN 104796975 B CN104796975 B CN 104796975B CN 201510178316 A CN201510178316 A CN 201510178316A CN 104796975 B CN104796975 B CN 104796975B
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small cell
power
power regulation
target
users
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CN104796975A (en
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成蕾
高月红
蔡凤恩
陈国�
张欣
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a kind of descending self-adapting power regulating method based in dense deployment scene, which includes how that dynamic measures the downlink business demand intensity of target BS, how to carry out adaptive power adjusting in cluster.To realize the promotion of system energy efficiency.Detailed description of the invention Fig. 2 is the flow chart of descending self-adapting power regulating method.

Description

One of dense deployment scene descending self-adapting power regulation mode
Technical field
The present invention relates to wireless mobile telecommunication technology fields, in particular to one of downlink power control adaptive power Regulative mode.
Background technique
With universal, the wireless data traffic realization blowout growth of LTE technology.The heterogeneous network proposed in TR36.932 Concept, by the basis of conventional macro base station covers, the small base stations such as superposition deployment Small cell can be realized effectively The service distributing of hot spot region.Small cell is easy to dispose, and the advantage flexibly managed is believed to sufficiently adapt to the 5G epoch To networking equipment propose high capacity, spectral efficient, low energy consumption demand.However under the following intensive scene, even if Small The energy consumption of cell unit base station is lower, and when hundreds of small base station deployment is in same sector, total energy consumption will not allowed yet It despises.Meanwhile the strong problem of inter-cell interference thus caused will also be on the rise.
For the demand, we improve on the basis of small base station dynamic switch strategy.In super-intensive office building Under the scene of group, business demand has apparent tidal regime, and has the characteristics of indoor distribution centralization.For this purpose, we will Small cell dynamic switch strategy further refines, and proposes a kind of descending self-adapting function based on target BS loading demand Rate regulation scheme.
Summary of the invention
(1) technical problem to be solved
Present invention seek to address that how dynamically to measure the downlink business demand intensity of target BS, and how to carry out in cluster Adaptive power is adjusted.To realize the promotion of system energy efficiency.
(2) technical solution
The determination scheme of adaptive power regulatory factor: according to target BS real time load and historic load in cluster Comprehensive assessment determines the descending self-adapting power regulation factor.Limited energy consumption resource is tilted into hot spot region base station, and other The base station of business demand lower region then keeps lower energy consumption to configure.Continue the base station that no business arrives to be set as only maintaining The dormant state of most basic signalling is waited and being waken up.Rule is as follows:
1. the location coordinate information of each Small cell is read in cell sub-clustering, by same office building, belong to same layer Small cell be divided into cluster, Small cell shared information and be performed in unison with power adjustment scheme in cluster, meanwhile, by position Small cell in housing-group periphery is labeled as free Small cell, adaptive power adjustment process is not involved in, always with perseverance Determine power transmission；
2. Small cell power regulation upper limit α P is arranged when each time slot startsmax, two kinds of busy, idle is provided Option；
3. the power control factor of down load driving: the user that combining target Small cell currently needs to service is arranged The number of users that service is completed in quantity and history accounts for the specific gravity of average service number of users to determine, concrete mode such as formula 1- Shown in 1:
Wherein βiFor target Small cell load driving power controlling elements, Ti-reqIt is currently needed for target Small cell The number of users to be serviced, TAvg-reqFor the average user quantity that Small cell each in cluster currently needs to service, Ti-hisFor The number of users that target Small cell history has serviced, TAvg-hisIt has been serviced for Small cell history each in cluster Average user number, ε are to adjust historic load and present load to influence the factor of specific gravity；
4. determining the lower slot transmission of target BS jointly by load driving power controlling elements and power regulation upper limit value Power, concrete mode is as shown in formula 1-2:
WhereinFor target Small cell transimission power,For target Small cell current transmission power, PmaxFor target Small cell maximum transmission power, α is the constraint factor in adaptive power regulation scheme；
5. determining whether power regulation mode changes according to current time at the end of time slot, repeating step 2 to 4；
(3) scheme works
Technical solution proposed by the present invention measures the downlink business demand intensity of target BS by reasonably design, thus It realizes that adaptive power is adjusted in cluster, so that system energy utilization rate is promoted, improves system performance.
When in the housing-group that intensively writes using this descending self-adapting power regulation mode, working day uses busy mode, That is the system transmission power upper limit that will promote each small base station, provides more resources and meets flow demand；Festivals or holidays use idle mould Formula, system will suitably reduce the transmission power upper limit of each small base station, and the whole energy consumption of housing-group is controlled in lower level, is reached Resource-effective purpose.
(4) specific embodiment
Referring to technical scheme steps 1 in (two) to step 5.
Detailed description of the invention
This specification attached drawing and brief is given below.
Figure one is application scenarios of the invention
Figure two is the flow chart of descending self-adapting power adjustment scheme.

Claims (2)

1. one of dense deployment scene descending self-adapting power regulation mode, the specific steps are as follows:
Step 1: cell sub-clustering reads the location coordinate information of each Small cell after scene determines, will be located at same and write The Small cell of word building and same floor is labeled as same cluster, Small cell shared information and is performed in unison with power tune in cluster Section scheme, meanwhile, the Small cell for being located at housing-group periphery is labeled as free Small cell, is not involved in adaptive power tune Section process, is transmitted always with firm power；
Step 2: setting power regulation upper limit value α Pmax, the unit Small cell transmission power of system busy and idle time is set The upper limit guarantees power regulation within the scope of comparatively safe；
Step 3: setting power regulation factor-beta, when each time slot starts, combining target Small cell currently needs to service The number of users that service is completed in number of users and history accounts for the specific gravity of average service number of users down load driving is arranged Power control factor, specific formula are as follows:
Wherein βiFor target Small cell down load driving power controlling elements, Ti-reqIt is currently needed for target Small cell The number of users to be serviced, TAvg-reqFor the average user quantity that Small cell each in cluster currently needs to service, Ti-hisFor The number of users that target Smallcell history has serviced, TAvg-hisIt has been serviced for Small cell history each in cluster Average user number, ε are to adjust historic load and present load to influence the factor of specific gravity；
Step 4: determine the transmission power of the lower time slot of target BS jointly by said two devices:
WhereinFor target Small cell transimission power,For target Small cell current transmission power, PmaxFor mesh Small cell maximum transmission power is marked, α is the constraint factor in adaptive power regulation scheme；
Step 5: at the end of time slot, determining whether power regulation mode changes according to current time, repeat step 2 to 4.
2. a kind of descending self-adapting power regulation mode as described in claim 1, it is characterised in that by the way that power tune is arranged Upper limit value is saved, the concrete scheme of power regulation can be switched under several different modes；Using this in the housing-group that intensively writes When descending self-adapting power regulation mode, working day uses busy mode, i.e. system will be on the transmission power that promote each small base station Limit, provides more resources and meets flow demand；Festivals or holidays use idle mode, and system will suitably reduce the transmission function of each small base station The whole energy consumption of housing-group is controlled in lower level, is achieved the purpose that resource-effective by the rate upper limit.
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CN105960005B (en) * 2015-11-25 2019-05-03 北京邮电大学 The Poewr control method of user fairness is ensured in super-intensive network

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