Energy-saving dynamic frequency spectrum planning method in femtocell network

The millimicro microcellular network the dynamic spectrum is method for energy-saving

technical field

(0001) Invention relates to a mobile communication network field, special, the invention is provided with the next generation mobile communication system (LTE/LTE-Advanced) of the femto- community (Femtocell) double-layer network the channeling a to the Soft frequency reuse, SFR) and energy - frequency method.

Background method

[0002]The, a third-generation mobile communication system associated obtaining widespread civil; meanwhile, UMTS (universal mobile communication system and evolution Method of lte the standard 9th pole (Release-9) is further formulated to achieve at the end of 2010, wherein the standard of fourth generation of mobile communication system formulates (Release-11), which is placed the light expectations of 3GPP leadership formulation's LTE-Advanced method.

[0003] Along with the expanding of wireless communication technique, a a LTE system, a simple OFDMA accessing method of which are, so between the user in the community and an interference no hole, and from with strong interferences of the communities of the community of user. For solving LTE and a plurality of the community of user interference serious distribution using OFDMA cover, claims OFDMA interference second/hard process; the channeling is composed of a flexible the distribution of frequency, wherein for display suffecient interference second/with avoiding simultaneously, better is adapted to the community service exchange tendency.

[0004] Along with a wireless communication system frequency with high; the signal attenuation more and a more serious, signal strength and quality of thereof configured with a cover and other end a however, a user service quality other is in gradually lifting, is realized a better indoor covering network and a network capacity expansion, AND further introduce Femtocell (femto- community), display according to the domestic and related countings, a 3G time voice 70% features and 90% data service occur the indoor, not only a better indoor covering energy of the need of user unceasing added service quality and high speed requirement, wherein of home base station is deployed of the user, voluntarily can saveExecuting fixing capital invests, a improving executing income, a femto and deploy the indoor, university, connector, market and base.

[0005] Compared with common Acer, Wherein the femto- community base station with small volume and transmission power low and user voluntarily installing and maintaining, plug and work and characteristic, the domestic and the operating and service electrically connected with the femto- community with a a enormous warning, wherein North America, Singapore and areas; femto- community base station associated obtaining with commercial.

[0006] Along with the unceasing growing method of access, mobile communication network one of the main energy consumption factors part, research indicated for wireless access network and mobile communication network energy consumption exceeds 80%, wherein the magnetism configuration of femto- community loop comprises a community magnetism energies, then the mobile communication network energy efficiency, wherein the femto- social network energy efficiency, wherein very emergency.

[0007] The, wherein the femto- community is deployed by user, and starting and closing is provided with uncertainty, so on femto- community double-layer grid frequency is into a new challenge. The prior research, and femto- community's frequency plan's warning part which is - frequency of the frequency allocation method and single community of static, comprising an considered the inter-cell interference second. The existing method for very difficult efficient reduced double-layer network inter-cell interference, and energy consumption of lowered double-layer network.

invention content

[0008] The invention is used for capable of being not connected in aggregate of prior frequency is a very good solving femto- community upper network is inter-cell interference second and problems of energy consumption, claims a flexible channeling energy-saving to a dynamic frequency is method, device and can effectively avoiding the light inter-cell interference and lowered energy consumption.

[0009] In turn to realize as, solving corresponding an problems, the invention claims a soft channeling energy-saving to a dynamic frequency: scheme

[0010] Steps: IThe light microzonation cellular is divided into three packaging machine of fanning strip; each section is divided into two that: Internal area and external area, and integrated the energy consumption; the

[0011] Steps: 2The sensors three parts frequency range is in OFDMA wireless network is receiver,

[0012] Steps: 3Acer is provided with a centre entity, centre entity confirm each mobile terminal and femto- community's position information;

[0013] Steps: 4The frequency is of external: areaBased on the channeling, the light community user in each external section area may use receiver frequency band a part, a bandwidth of the macro community user in the outer section area assigns orthogonally, the femto- community user assigns to the whole receiver frequency band; each

[0014] Steps: 5The frequency is of a: areaThe light community user in internal section area associated is made of methods to the frequency of the external section area is community user (the frequency of the macro user utilizations), further - comprising a multiplexing of frequency band a part (Acer The low-consumption power transmission signal of the frequency); of the ratio of the P, the inner area other part of femto- community multiplexing of frequency band; of the ratio is I-P.

[0015] The pedal I, with a double-layer network the energy consumption model: Acer The total power consumption mainly comprising two parts, a part of the static power consumption and dynamic power consumption, a averaging transmission power of Acer is PM, wherein the total power consumption is PMt (rtal, steps:

[0016] Pitotai of nsecNAPaMPM and Pcm

[0017] And the section of the Afsre represent each is community, wherein Nap represent each section power amplifier are, aM is a scale-up factor, a Rubber is a averaging transmission power Pm a freestanding, a home base station main power consumption is PFt) (Tal the bFPF+PCF. Therefore the community integral system power consumption consumes Ptrtal is: Pt layer (rtal the PMt) (tal+NfPFt (Tal), Nf is in social the femto- community's of.

[0018] The pedal 2, mobile terminal and measurement community reference power receiving (RSRP) is community, and feeding back to the width community base station, the community base depot's centre entity compares according to the reference power receiving and threshold δ of mobile terminal, and a RSRP > δ, wherein the mobile terminal into a mobile terminal, and mobile terminal is femto- community user, the femto- community of which the mobile terminal is divided into a femto- community, otherwise the mobile terminal is divided into the external mobile terminal, a femto- community of the mobile terminal is divided into the external femto- community.

[0019] The pedal 5, wherein internal is community user and a femto- community user to the community's Acer) and related information, the information comprising a service type and client type of user (is community user, and femto- community user), centre entity counting the information for reporting, according to the differential lower confirm scale-up factor p-type

[0020] P= argmax

[0021]

<img id="idf0001" file="CN102612046AD00051.tif" img-content="drawing" img-format="tif" />

And the U Tf, A table an inner area is community user and femto- community user unit spectrum middle throughput; the outside of the macro community user and femto- community user unit spectrum middle throughput for Tm, device and Tf, a indicates, and the lower is of social network layer and femto- community layer QoS requirement.

[0022] The pedal 5 defining the light social network layer and femto- community layer QoS, namely ensure the user middle throughput and a femto- on community is in social network user at low throughput averaging parameter, a η (0&lt; η &lt;0.5);

[0023]

<img id="idf0002" file="CN102612046AD00061.tif" img-content="drawing" img-format="tif" />

[0024] A see from the technical solution, the method according the invention is reduced interference for community edge of the macro community user received; the discontinuation rate of lowered of user. The frequency of the macro community user and femto- community the user inner area assigns orthogonally, comprising avoiding the light social network layer and large layer is interference between femto- social network layers are, and ensure the user QoS requirement's condition, fully the inner area and external user area distribution and traffic current distribution consideration is community, a spectrum for dynamically adjusting is community user and femto- community assigns user, the maximized spectrum utilization rate, wherein improving the network volume ratio usage.

[0025] Lower and further elaboration to the diaphragm technical solution is attached the digital and specific embodiment.

brief description fo the drawings

[0026] A transparent the embodiment and existing technical solution of elaboration the invention, the inside the emitter is attached shape of the technical solution distributed attached digital and prior art description of this invention uses a simple with, obviously, wherein it is put in the horizontal creative of the terminal; the field and a provide a straight an auxiliary certain through the auxiliary digital.

[0027] The position I for fixing the embodiment of the invention claims a soft channeling a to the sub- frequency band planning drawing;

[0028] Shown the digital 2 is the embodiment of the invention the sub- frequency band distribution switch position of femto-, community

Performing is specifically

[0029] In order to make the invention are more clarity of technical solution coefficients description, a to the invention makes the further detailed elaboration the light of the auxiliary figure's specifically embodiment, the embodiment of obviously described is only some embodiments of invention, which is not with the embodiment. To the embodiment of this invention, the common a provide the field of capable of realizing other embodiments of this invention on the base of the horizontal creative, belonging to the invention has a protection.

[0030] The following description, a single-pole to the brief an connected with the method according the invention nothing is made or defined crosses by.

[0031] The main circuits of this invention is; the light for inter-cell the channeling, avoiding the inter-cell interference. The femto- community deploys firstly, mobile terminal to the Acer Wherein a reference signal, the Acer to The reference signal strength, by mobile terminal located at the position information; at the same time counting inner and outer area is community and user femto- community service user and information, fully the inner area and external user area distribution and traffic current distribution consideration is community, a spectrum for dynamically adjusting is community user and femto- community assigns user, the maximized system for usage ratio, simultaneously ensure user QoS.

[0032] As follows quotation terminology of Acer Wherein a, it does not belong to eNodeB, base station, a evolution base station. As follows quotation terminology of community femto- base station comprises an, it does not belong to Home eNodeB and household base station, the femtocell point.

[0033] The position I as a soft channeling a to the sub- frequency band planning drawing, the isolating using comprise three communities, nine packaging machine of fanning strip and 101 receiver frequency bands, each, and inner area and external area special, according to mobile terminal reference signal strength confirm mobile terminal location information.

[0034] Digital 2) is sub- frequency band distribution switch position of the embodiment of the invention femto- community; and a section of the invention, specifically comprising:

[0035] Steps: 201Is divided into three packaging machine of fanning strip is the middle microzonation; each section is divided into two that: Internal area of

6 Areas; and integrated energy consumption realizing.

[0036] The energy consumption model is a double-layer network the peripheral steps of: Acer The total power consumption mainly comprising two parts, a part of the static power consumption and dynamic power consumption, a averaging transmission power of Acer is PM, wherein the total power consumption is PMt (rtal, steps:

[0037] Pitotai of nsecNAPaMPM+PCM

[0038] and NThe section of the represent each is community, wherein Nap represent each section power amplifier are, aM is a scale-up factor, a Rubber is a averaging transmission power Pm a freestanding, a home base station main power consumption is PFt) (Tal the bFPF+PCF. Therefore the community integral system power consumption consumes Ptrtal is: Pt layer (rtal the PMt) (tal+NfPFt (Tal), Nf is in social the femto- community's of.

[0039] Steps: 202The sensors three parts frequency range is in OFDMA wireless network is receiver.

[0040] Steps: 203Acer is provided with a centre entity, centre entity confirm each mobile terminal and femto- community's position information.

[0041] The invention claims a mobile terminal measurement on community reference power receiving (RSRP) is community, and feeding back to the width community base station, the community base depot's centre entity compares according to the reference power receiving and threshold δ of mobile terminal, and a RSRP &gt; δ, wherein the mobile terminal into a mobile terminal, and mobile terminal is femto- community user, the femto- community of which the mobile terminal is divided into a femto- community, otherwise the mobile terminal is divided into the external mobile terminal, a femto- community of the mobile terminal is divided into the external femto- community.

[0042] Steps: 204The frequency is of external: areaBased on the channeling, the light community user in each external section area may use receiver frequency band a part, a bandwidth of the macro community user in the outer section area assigns orthogonally, the femto- community user assigns to the whole receiver frequency range of.

[0043] The 205 Α: A great community user and a femto- community user to the community's Acer) and related information, the information comprising a service type and client type of user (is community user, and femto- community user), centre entity counting the information for reporting, according to the differential lower confirm scale-up factor p-type

[0044]

<img id="idf0003" file="CN102612046AD00071.tif" img-content="drawing" img-format="tif" />

[0045] T-SHAPED ~~pTm4n as a {^-p) Nfi „Tfin +-Tmout+Nf oulTf oul; the U Tf, A table an inner area is community user and femto- community user unit spectrum middle throughput; the outside of the macro community user and femto- community user unit spectrum middle throughput for Tm, device and Tf, a indicates, and the lower is of social network layer and femto- community layer QoS requirement.

[0046] The invention 205A defining the light social network layer and femto- community layer QoS, namely ensure the user middle throughput and femto- on community is in social network user at low middle throughput, a parameter is η (ο &lt; η) &lt;0.5.

[0047]

<img id="idf0004" file="CN102612046AD00072.tif" img-content="drawing" img-format="tif" />

[0048] The 205 Β: The frequency is of a: areaThe light community user in internal section area associated is made of methods to the frequency of the external section area is community user (the frequency of the macro user utilizations), further - comprising a multiplexing of frequency band a part (Acer The low-consumption power transmission signal of the frequency); of the ratio of the P, the inner area other part of femto- community multiplexing of frequency band; of the ratio is I-P.