CN104519548A - Method and system for allowing terminals to access networks and method and device for acquiring network capacity - Google Patents

Abstract

The invention provides a method and a system for allowing terminals to access networks and a method and a device for acquiring network capacity. The method for allowing the terminals to access the networks includes enabling a macro base station to acquire macro base station uplink power and macro base station downlink power of the mobile terminals, and transmitting the macro base station uplink power and the macro base station downlink power of the mobile terminals to inter-base-station share management equipment; enabling home base stations to acquire home base station uplink power and home base station downlink power of the mobile terminals and transmitting the home base station uplink power and the home base station downlink power of the mobile terminals to the inter-base-station share management equipment; enabling the inter-base-station share management equipment to determine base station access modes of the mobile terminals according to preset criteria, and transmitting the base station access modes of the mobile terminals to the macro base station and the home base stations so as to allow the mobile terminals to access the networks. The method and the system for allowing the terminals to access the networks and the method and the device for acquiring the network capacity have the advantages that users can flexibly access the different optimal base stations during uplink and downlink, accordingly, the uplink and downlink quality can be optimized, and the downlink and uplink traversing capacity can be effectively improved.

Description

The method and system of accessing terminal to network, the method obtaining network capacity and device

Technical field

The present invention relates to mobile communication technology field, particularly relate to a kind of method and system of accessing terminal to network, the method obtaining network capacity and device.

Background technology

In conventional monolayers cellular network, the transmitting power of all base stations is identical, signal environment difference is less, therefore the descending access base station selected based on maximal received power of user, also be simultaneously nearest with base station, on its up channel, the received power of this base station end is also maximum usually, it has been generally acknowledged that this base station is the descending optimum base station with multi-upstream access of user simultaneously.Access descending with up in legacy user's access technology is coupled, namely when user is descending be linked into a base station time, it is up is also linked into this base station, in monolayer honeycomb network, based on the conditional access technology section that received power is maximum realize simultaneously user descending with multi-upstream access to optimum base station, the feature that monolayer honeycomb network hexagonal configuration covers meets the user mode access of descending coupling traditionally.

In recent years, the framework that cellular network achieves jumping characteristic is broken through, the different various modes of watt level, plot area access community, as macrocell, Microcell, picocell, Femto cell, relaying cell etc. can coexist on the specific area, form multilayer heterogeneous network.Multilayer heterogeneous network not only can support the user of different mobility, and as macrocell provides fast moving service, microcellular provides Information Mobile Service at a slow speed; The service of better quality can also be provided for mobile subscriber, namely higher reliability and lower user cost, and more effective spectrum reuse is provided and more fully covers raising network capacity, microcellular can be used as supplementing of macro cells and extends, and can be applicable to the blind spot such as subway, the basement area that macrocellular is difficult to cover.In addition, by providing dedicated network for the user of high traffic area as bustling commercial street, shopping center, stadium etc., miniature cellular basestation can unload part customer flow from former macrocellular network, thus reaches the object improving data rate.

In multilayer heterogeneous network, due to the uncertainty of Nei Geceng base station, community and customer location, it connects comparatively complicated and has randomness.Due to the difference of the transmitting power of each layer base station, and up-downgoing communication environments between base station and user, the i.e. difference of path gain, when user is descending be linked into a base station based on received power is maximum time, on its up channel, the received power of this base station end is not often maximum, as in two-layer cellular network, because the transmitting power of macro base station is larger, the user that distance macro base station is far away, it is descending still may be connected to macro base station, but the base station that now upcoming base station end received power is larger is the femto cell nearer apart from this user, if now still adopt traditional user's up-downgoing access coupling technique, uplink gain can be affected, cause user uplink signal to noise ratio lower, thus restriction user uplink throughput.That is descending connection can limit up network capacity, cannot realize descendingly reaching optimum with multi-upstream access simultaneously, thus cannot effectively utilize the resource of multilayer base station.In addition, the user that distance macro base station is comparatively far away or transmission environment is poor, for ensureing that the upward signal of its macro base station end can effectively be detected in base station end, the transmitting power of subscriber equipment is sufficiently large, thus can affect flying power and the battery life of subscriber equipment.

Summary of the invention

For defect of the prior art, the invention provides a kind of method and system of accessing terminal to network, the method obtaining network capacity and device, user can be made in uplink and downlink to access different optimum base stations flexibly, realize the optimization of uplink downlink quality, effectively promote descending and up ergodic capacity.

First aspect, the invention provides a kind of method of accessing terminal to network, comprising:

Macro base station obtains mobile terminal to the ascending power of described macro base station and descending power, and described mobile terminal is sent to Sharing Management equipment between base station to the ascending power of described macro base station and descending power;

Home eNodeB obtains described mobile terminal to the ascending power of described Home eNodeB and descending power, and described mobile terminal is sent to Sharing Management equipment between described base station to the ascending power of described Home eNodeB and descending power;

Between described base station, Sharing Management equipment is according to the criterion preset, and determines the mode of described mobile terminal access base station, and the mode of described mobile terminal access base station is sent to described macro base station and described Home eNodeB, to make described connection of mobile terminal into network.

Further, described default criterion comprises maximal received power criterion.

Further, described default criterion comprises maximize SINR criterion.

Second aspect, the invention provides a kind of system of accessing terminal to network, comprises macro base station, Home eNodeB, Sharing Management equipment between mobile terminal and base station;

Sharing Management devices interconnect between described macro base station and described base station;

Sharing Management devices interconnect between described Home eNodeB and described base station;

Described mobile terminal and described macro base station interconnected;

Described mobile terminal and described Home eNodeB interconnected.

The third aspect, the invention provides a kind of method obtaining network capacity, comprising:

Obtain the distance between Home eNodeB and mobile terminal, determine descending probability and the up probability being connected to described Home eNodeB of described mobile terminal being connected to described Home eNodeB of described mobile terminal according to the distance between described Home eNodeB and mobile terminal;

Obtain the distance between macro base station and mobile terminal, determine descending probability and the up probability being connected to described macro base station of described mobile terminal being connected to described macro base station of described mobile terminal according to the distance between described macro base station and mobile terminal;

Obtain upward signal that described mobile terminal is connected to described Home eNodeB to add with interference and make an uproar than SINR and descending SINR;

Obtain described mobile terminal and be connected to the upstream sinr of described macro base station and descending SINR;

Obtain described mobile terminal and be connected to the up ergodic capacity of described Home eNodeB and descending ergodic capacity;

Obtain described mobile terminal and be connected to the up ergodic capacity of described macro base station and descending ergodic capacity;

Be connected to according to described mobile terminal is descending the descending ergodic capacity that the probability of described Home eNodeB, described mobile terminal are descendingly connected to the probability of described macro base station, the descending ergodic capacity that the descending SINR that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the descending SINR of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine downlink network total capacity;

Be connected to according to described mobile terminal is up the up ergodic capacity that the probability of described Home eNodeB, described mobile terminal are uply connected to the probability of described macro base station, the up ergodic capacity that the upstream sinr that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the upstream sinr of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine uplink network total capacity.

Further, the descending probability being connected to described Home eNodeB of described mobile terminal is:

${\mathrm{\Δ}}_f^D=\frac{2}{R^2}{\∫}_0^R(1-e^{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}})\mathrm{rdr}$

The up probability being connected to described Home eNodeB of described mobile terminal is:

${\mathrm{\Δ}}_f^U=\frac{2}{R^2}{\∫}_0^R(1-e^{-\mathrm{\π}{\mathrm{\λ}}_f{r}^{2\widehat{\mathrm{\α}}}})\mathrm{rdr}$

The descending probability being connected to described macro base station of described mobile terminal is:

${\mathrm{\Δ}}_m^D=\frac{2}{R^2}{\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}\}\mathrm{rdr}$

The up probability being connected to described macro base station of described mobile terminal is:

${\mathrm{\Δ}}_m^U=\frac{2}{R^2}{\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{r}^{2\widehat{\mathrm{\α}}}\}\mathrm{rdr}$

Wherein, R is macro base station radius of society, λ _ffor Home eNodeB Poisson's point distribution density, for macro base station and the ratio of Home eNodeB transmitting power, for the ratio of the descending path loss index of macro base station and Home eNodeB, r is the variable of the distance between user and macro base station.

Further, described mobile terminal is connected to the descending SINR of described Home eNodeB and is:

${\mathrm{SINR}}_f^D\left(x\right)=\frac{P_f{h}_{f,0}^D{x}^{-{\mathrm{\α}}_f}}{P_m{h}_m^D{\left|Y_m\right|}^{-{\mathrm{\α}}_m}+{\mathrm{\Σ}}_{i\∈\mathrm{\Φ}\backslash \mathrm{fB}{S}_0}{P}_f{h}_i^D{\left|Y_i\right|}^{{-\mathrm{\α}}_f}+{\mathrm{\σ}}^2}$

Wherein, P _mfor the transmitting power of macro base station, for the rayleigh distributed parameter of macro base station downlink path, Y _mfor the distance of macro base station and user, P _ffor the transmitting power of Home eNodeB, for connecting the rayleigh distributed parameter of Home eNodeB downlink path, x is the distance connecting Home eNodeB and user, α _ffor the path loss index that Home eNodeB is descending, i ∈ Φ fBS ₀represent that Home eNodeB i connects base station, for the rayleigh distributed parameter of interference Home eNodeB i downlink path, Y _ifor disturbing the distance of Home eNodeB i and user, σ ²for additive Gaussian noise power;

The upstream sinr that described mobile terminal is connected to described Home eNodeB is:

${\mathrm{SINR}}_f^U\left(x\right)=\frac{P_0{h}_{f,0}^U{x}^{-{\mathrm{\α}}_0}}{{\mathrm{\Σ}}_{j\∈\mathrm{\Ω}\backslash \mathrm{\ΩfB}{S}_0}{P}_0{h}_j^U{\left|Z_j\right|}^{{-\mathrm{\α}}_0}+{\mathrm{\σ}}^2}$

Wherein, P ₀for the transmitting power of user, for user is to the rayleigh distributed parameter connecting Home eNodeB up path, x is the distance connecting Home eNodeB and user, α ₀for the loss index of user uplink, the connection base station of expression user j is not Home eNodeB fBS ₀, for the rayleigh distributed parameter of interference user j up path, Z _jfor interference user j is to Home eNodeB fBS ₀distance;

The upstream sinr that described mobile terminal is connected to described macro base station is:

${\mathrm{SINR}}_m^U\left(x\right)=\frac{P_0{h}_m^U{x}^{-{\mathrm{\α}}_0}}{{\mathrm{\Σ}}_{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_m}{P}_0{h}_j^U{\left|Z_j\right|}^{{-\mathrm{\α}}_0}+{\mathrm{\σ}}^2}$

Wherein, for user is to the rayleigh distributed parameter of macro base station up path, for the rayleigh distributed parameter of interference user j up path, Z _jfor interference user j is to the distance of macro base station, j ∈ Ω Ω _mfor the connection base station representing user j is not macro base station;

The descending SINR that described mobile terminal is connected to described macro base station is:

${\mathrm{SINR}}_m^D\left(x\right)=\frac{P_m{h}_m^D{x}^{-{\mathrm{\α}}_m}}{{\mathrm{\Σ}}_{i\∈\mathrm{\Φ}}{P}_f{h}_i^D{\left|Y_i\right|}^{{-\mathrm{\α}}_f}+{\mathrm{\σ}}^2}$

Wherein, P _mfor the transmitting power of macro base station, for the rayleigh distributed parameter of macro base station downlink path, x is the distance of macro base station and user, α _mfor the path loss index that macro base station is descending, i ∈ Ω represents that the connection base station of user i is Home eNodeB, P _ffor the transmitting power of Home eNodeB, for Home eNodeB i is to the rayleigh distributed parameter of user's downlink path, Y _ifor Home eNodeB i is to the distance of user, α _ffor the path loss index that Home eNodeB is descending.

Further, described mobile terminal is connected to the descending ergodic capacity of described Home eNodeB and is:

$R_f^D=\frac{2\mathrm{\π}{\mathrm{\λ}}_f}{{\mathrm{\Δ}}_f^D{R}^2}{\∫}_0^R{\∫}_0^{\∞}x(1-\frac{{\hat{P}}^2{x}^{2{\mathrm{\α}}_f/{\mathrm{\α}}_m}}{R^2})\×C\left(t\right)\exp (-\mathrm{\π}{\mathrm{\λ}}_f{x}^2-A_3\left(t\right))\mathrm{dtdx}$

the probability of Home eNodeB is connected to for mobile terminal is descending, for macro base station and the ratio of Home eNodeB transmitting power, α _m/ α _ffor the ratio of the descending path loss index of macro base station and Home eNodeB;

$C\left(t\right)={\∫}_0^R\left(\frac{2y}{1+\hat{P}{x}^{{\mathrm{\α}}_m}(e^t-1)y^{{-\mathrm{\α}}_m}}\right)\mathrm{dy}$

$A_3\left(t\right)=2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+{\left(P_f{V}_3\right)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy}$

The up ergodic capacity that described mobile terminal is connected to described Home eNodeB is:

$R_f^U=\frac{2\mathrm{\π}{\mathrm{\λ}}_f}{{\mathrm{\Δ}}_f^U}{\∫}_0^R{\∫}_0^{\∞}x(1-\frac{x^{2{\mathrm{\α}}_f/{\mathrm{\α}}_m}}{R^2})\×\exp (-\mathrm{\π}{\mathrm{\λ}}_f{x}^2-A_4\left(t\right))\mathrm{dtdx}$

the probability of Home eNodeB is connected to for mobile terminal is up;

$A_4\left(t\right)=\frac{1-e^t}{P_0{x}^{{-\mathrm{\α}}_0}/{\mathrm{\σ}}^2}-\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+x^{-{\mathrm{\α}}_0}{(e^t-1)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})$

The up ergodic capacity that described mobile terminal is connected to described macro base station is:,

$R_m^U=\frac{2}{{\mathrm{\Δ}}_m^U{R}^2}{\∫}_0^R{\∫}_0^{\∞}\mathrm{xexp}(-\mathrm{\π}{\mathrm{\λ}}_f{x}^{2\widehat{\mathrm{\α}}}-A_2\left(t\right))\mathrm{dtdx}$

the probability of macro base station is connected to for mobile terminal is up;

$A_2\left(t\right)=-\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+x^{-{\mathrm{\α}}_0}{(e^t-1)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})$

The descending ergodic capacity that described mobile terminal is connected to described macro base station is:

$R_m^D=\frac{2}{{\mathrm{\Δ}}_m^D{R}^2}{\∫}_0^R{\∫}_0^{\∞}\mathrm{xexp}(-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{x}^{2\widehat{\mathrm{\α}}}-A_1\left(t\right))\mathrm{dtdx}$

the probability of macro base station is connected to for mobile terminal is descending;

$A_1\left(t\right)=-2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+\hat{P}{x}^{-{\mathrm{\α}}_m}{(e^t-1)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy}.$

Further, described downlink network total capacity is:

$R^D={\mathrm{\Δ}}_m^D{R}_m^D+{\mathrm{\Δ}}_f^D{R}_f^D$

for mobile terminal is connected to the descending ergodic capacity of macro base station, the probability of macro base station is connected to for mobile terminal is descending, the probability of Home eNodeB is connected to for mobile terminal is descending, for mobile terminal is connected to the descending ergodic capacity of Home eNodeB;

Described uplink network total capacity is:

$R^U={\mathrm{\Δ}}_m^U{R}_m^U+{\mathrm{\Δ}}_f^U{R}_f^U$

the probability of macro base station is connected to for mobile terminal is up, for mobile terminal is connected to the up ergodic capacity of macro base station, the probability of Home eNodeB is connected to for mobile terminal is up, for mobile terminal is connected to the up ergodic capacity of Home eNodeB.

Fourth aspect, the invention provides a kind of device obtaining network capacity, described device comprises acquiring unit and determining unit;

Described acquiring unit, for obtaining the distance between Home eNodeB and mobile terminal, determine descending probability and the up probability being connected to described Home eNodeB of described mobile terminal being connected to described Home eNodeB of described mobile terminal according to the distance between described Home eNodeB and mobile terminal;

Described acquiring unit, also for obtaining the distance between macro base station and mobile terminal, determine descending probability and the up probability being connected to described macro base station of described mobile terminal being connected to described macro base station of described mobile terminal according to the distance between described macro base station and mobile terminal;

Described acquiring unit, also to add with interference make an uproar than SINR and descending SINR for obtaining upward signal that described mobile terminal is connected to described Home eNodeB;

Described acquiring unit, is also connected to the upstream sinr of described macro base station and descending SINR for obtaining described mobile terminal;

Described acquiring unit, is also connected to the up ergodic capacity of described Home eNodeB and descending ergodic capacity for obtaining described mobile terminal;

Described acquiring unit, is also connected to the up ergodic capacity of described macro base station and descending ergodic capacity for obtaining described mobile terminal;

Described determining unit, for being connected to according to described mobile terminal is descending the descending ergodic capacity that the probability of described Home eNodeB, described mobile terminal are descendingly connected to the probability of described macro base station, the descending ergodic capacity that the descending SINR that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the descending SINR of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine downlink network total capacity;

Described determining unit, also for being connected to according to described mobile terminal is up the up ergodic capacity that the probability of described Home eNodeB, described mobile terminal are uply connected to the probability of described macro base station, the up ergodic capacity that the upstream sinr that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the upstream sinr of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine uplink network total capacity.

As shown from the above technical solution, by the method and system of accessing terminal to network provided by the invention, the method obtaining network capacity and device, wherein the method for access network is: macro base station obtains mobile terminal to the ascending power of described macro base station and descending power, and described mobile terminal is sent to Sharing Management equipment between base station to the ascending power of described macro base station and descending power; Home eNodeB obtains described mobile terminal to the ascending power of described Home eNodeB and descending power, and described mobile terminal is sent to Sharing Management equipment between described base station to the ascending power of described Home eNodeB and descending power; Between described base station, Sharing Management equipment is according to the criterion preset, and determines the mode of described mobile terminal access base station, and the mode of described mobile terminal access base station is sent to described macro base station and described Home eNodeB, to make described connection of mobile terminal into network.By the method and system of accessing terminal to network of the present invention, the method obtaining network capacity and device, user accesses different optimum base stations flexibly in uplink and downlink, realize the optimization of uplink downlink quality, effectively promote descending and up ergodic capacity.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in embodiment or description of the prior art is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

The schematic flow sheet of the method for a kind of accessing terminal to network that Fig. 1 provides for the embodiment of the present invention;

The macro base station that Fig. 2 provides for the embodiment of the present invention is separated the structural representation of access with up-downgoing under Home eNodeB isomery;

The structural representation of the system of a kind of accessing terminal to network that Fig. 3 provides for the embodiment of the present invention;

A kind of schematic flow sheet obtaining the method for network capacity that Fig. 4 provides for the embodiment of the present invention;

A kind of structural representation obtaining the device of network capacity that Fig. 5 provides for the embodiment of the present invention.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

The schematic flow sheet of the method for a kind of accessing terminal to network that Fig. 1 provides for the embodiment of the present invention, the macro base station that Fig. 2 provides for the embodiment of the present invention is separated the structural representation of access with up-downgoing under Home eNodeB isomery, as illustrated in fig. 1 and 2, the method for the accessing terminal to network of the present embodiment is as described below.

101, macro base station obtains mobile terminal to the ascending power of described macro base station and descending power, and described mobile terminal is sent to Sharing Management equipment between base station to the ascending power of described macro base station and descending power.

It should be understood that macro base station obtains mobile terminal in the cell range that macro base station covers to the ascending power of macro base station and descending power, and the mobile terminal of acquisition is sent to Sharing Management equipment between base station to the ascending power of macro base station and descending power.

102, Home eNodeB obtains described mobile terminal to the ascending power of described Home eNodeB and descending power, and described mobile terminal is sent to Sharing Management equipment between described base station to the ascending power of described Home eNodeB and descending power.

Be understood that, Home eNodeB obtains mobile terminal in the scope of family's base station coverage to the ascending power of Home eNodeB and descending power, the mobile terminal of acquisition is sent to Sharing Management equipment between base station to the ascending power of Home eNodeB and descending power simultaneously.

103, between described base station Sharing Management equipment according to preset criterion, determine the mode of described mobile terminal access base station, and the mode of described mobile terminal access base station is sent to described macro base station and described Home eNodeB, to make described connection of mobile terminal into network.

Be understood that, between base station, Sharing Management equipment receives mobile terminal that mobile terminal that macro base station sends sends to the ascending power of macro base station and descending power and Home eNodeB to the ascending power of Home eNodeB and the descending power access criterion that basis is default simultaneously, determine the mode of mobile terminal access base station, and the mode of mobile terminal access base station is sent to macro base station and Home eNodeB, to make connection of mobile terminal into network.

The access criterion preset in Sharing Management equipment between base station comprises maximal received power criterion and maximize SINR criterion.

The macro base station that Fig. 2 provides for the embodiment of the present invention is separated the structural representation of access with up-downgoing under Home eNodeB isomery, macro base station is positioned at the center in this region, and its radius of society is R, and transmitting power is P more greatly _m, to meet the covering in a big way of user's Low rate services demand.The Home eNodeB of low-power low cost is randomly dispersed in macrocell, meets the capacity requirement of user in zones of different.The distributed model of Home eNodeB is density is λ _fpoisson's point distribution, Home eNodeB transmitting power is P _f.It is λ that user distribution in this region obeys density ₀poisson's point distribution, the distribution of itself and Home eNodeB is separate, and on the region centered by specific user, it is λ that Home eNodeB still obeys density _fpoisson's point distribution.The transmitting power of user is P ₀, Home eNodeB and user gather and are designated as Φ and Ω respectively, and macro base station and the descending path loss index of Home eNodeB are α _mwith α _f, the loss index of user uplink is α ₀.

User selects the macro base station that connects or Home eNodeB based on maximal received power criterion, and thus it is descending is all maximum with the received power of multi-upstream access, and mode only considers the Rayleigh fading of path loss and unit power, received power P _rcomputing formula be

P _r＝KP _tr ^-α

Wherein, P _tfor transmitting power, K is constant, and being set to 1, r is distance between user and base station, and α is path loss index.For formula of reduction is derived and result, definition

$\hat{P}=\frac{P_m}{P_f},\widehat{\mathrm{\α}}=\frac{{\mathrm{\α}}_m}{{\mathrm{\α}}_f}$

Between base station can Sharing Management equipment by the transmission of this control information such as equipment completing user resource and mobile management, the access realizing user descending with up is separated.

The method of the accessing terminal to network provided by the present embodiment makes user access different optimum base stations flexibly in uplink and downlink, realizes the optimization of uplink downlink quality, effectively promotes descending and up ergodic capacity.

The structural representation of the system of a kind of accessing terminal to network that Fig. 3 provides for the embodiment of the present invention, as shown in Figure 3, the system of the accessing terminal to network of the present embodiment is as described below.

The system of accessing terminal to network comprises macro base station 32, Home eNodeB 33, Sharing Management equipment 31 between mobile terminal 34 and base station.

Between macro base station 32 and base station, Sharing Management equipment 31 is interconnected, and between Home eNodeB 33 and base station, Sharing Management equipment 31 is interconnected, and mobile terminal 34 is interconnected with macro base station 32, and mobile terminal 34 is interconnected with Home eNodeB 33.

The system of the accessing terminal to network provided by the present embodiment makes user access different optimum base stations flexibly in uplink and downlink, realizes the optimization of uplink downlink quality, effectively promotes descending and up ergodic capacity.

A kind of schematic flow sheet obtaining the method for network capacity that Fig. 4 provides for the embodiment of the present invention, as shown in Figure 4, the method for the acquisition network capacity of the present embodiment is as described below.

401, obtain the distance between Home eNodeB and mobile terminal, determine descending probability and the up probability being connected to described Home eNodeB of described mobile terminal being connected to described Home eNodeB of described mobile terminal according to the distance between described Home eNodeB and mobile terminal.

It should be understood that the distance obtained between Home eNodeB and mobile terminal, according to descending probability and the up probability being connected to Home eNodeB of mobile terminal being connected to Home eNodeB of the distance determination mobile terminal between Home eNodeB and mobile terminal.

The descending probability being connected to described Home eNodeB of mobile terminal is:

${\mathrm{\Δ}}_f^D=1-{\mathrm{\Δ}}_m^D=\frac{2}{R^2}{\∫}_0^R(1-e^{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}})\mathrm{rdr}$

The up probability being connected to described Home eNodeB of mobile terminal is:

${\mathrm{\Δ}}_f^U=1-{\mathrm{\Δ}}_m^U=\frac{2}{R^2}{\∫}_0^R(1-e^{-\mathrm{\π}{\mathrm{\λ}}_f{r}^{2\widehat{\mathrm{\α}}}})\mathrm{rdr}$

Wherein, R is macro base station radius of society, λ _ffor Home eNodeB Poisson's point distribution density, for macro base station and the ratio of Home eNodeB transmitting power, for the ratio of the descending path loss index of macro base station and Home eNodeB, r is the variable of the distance between user and macro base station.

402, obtain the distance between macro base station and mobile terminal, determine descending probability and the up probability being connected to described macro base station of described mobile terminal being connected to described macro base station of described mobile terminal according to the distance between described macro base station and mobile terminal.

It should be understood that the distance obtained between macro base station and mobile terminal, according to descending probability and the up probability being connected to described macro base station of mobile terminal being connected to macro base station of the distance determination mobile terminal between macro base station and mobile terminal.

The descending probability being connected to described macro base station of mobile terminal is:

$\begin{array}{c}{\mathrm{\Δ}}_m^D\stackrel{\mathrm{\Δ}}{=}\mathrm{Pr}\{K^D=k_1\}=E_{R_m}\left[\mathrm{Pr}\right\{P_{r,m}^D\left(R_m\right)>\underset{j\∈\mathrm{\Φ}}{\max }{P}_{r,j}^D\left(R_j\right)\left\}\right]\\ =E_{R_m}\left[\mathrm{Pr}\right\{P_{r,m}^D\left(R_m\right)>P_{r,j\∈\mathrm{\Φ}}^D\left(R_f\right)\left\}\right]\stackrel{\left(a\right)}{=}{E}_{R_m}\left[\mathrm{Pr}\right\{R_f>{\hat{P}}^{-1}{\left(R_m\right)}^{\widehat{\mathrm{\α}}}\left\}\right]\\ \stackrel{\left(b\right)}{=}{E}_{R_m}\left[\exp \right\{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{\left(R_m\right)}^{2\widehat{\mathrm{\α}}}\left\}\right]={\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}\}{f}_{R_m}\left(r\right)\mathrm{dr}\\ \stackrel{\left(c\right)}{=}\frac{2}{R^2}{\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}\}\mathrm{rdr}\end{array}$

The up probability being connected to described macro base station of mobile terminal is:

${\mathrm{\Δ}}_m^U\stackrel{\mathrm{\Δ}}{=}\mathrm{Pr}\{K^U=k_1\}=\frac{2}{R^2}{\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{r}^{2\widehat{\mathrm{\α}}}\}\mathrm{rdr}$

403, obtain upward signal that described mobile terminal is connected to described Home eNodeB to add with interference and make an uproar than SINR and descending SINR.

It should be understood that obtaining upward signal that described mobile terminal is connected to described Home eNodeB adds with interference and make an uproar than (Signal to Interference plus Noise Ratio is called for short SINR) and descending SINR.

The descending SINR that mobile terminal is connected to described Home eNodeB is:

${\mathrm{SINR}}_f^D\left(x\right)=\frac{P_f{h}_{f,0}^D{x}^{-{\mathrm{\α}}_f}}{P_m{h}_m^D{\left|Y_m\right|}^{-{\mathrm{\α}}_m}+{\mathrm{\Σ}}_{i\∈\mathrm{\Φ}\backslash \mathrm{fB}{S}_0}{P}_f{h}_i^D{\left|Y_i\right|}^{{-\mathrm{\α}}_f}+{\mathrm{\σ}}^2}$

Wherein, P _mfor the transmitting power of macro base station, for the rayleigh distributed parameter of macro base station downlink path, Y _mfor the distance of macro base station and user, P _ffor the transmitting power of Home eNodeB, for connecting the rayleigh distributed parameter of Home eNodeB downlink path, x is the distance connecting Home eNodeB and user, α _ffor the path loss index that Home eNodeB is descending, i ∈ Φ fBS ₀for representing that Home eNodeB i connects base station, for the rayleigh distributed parameter of interference Home eNodeB i downlink path, Y _ifor disturbing the distance of Home eNodeB i and user, σ ²for additive Gaussian noise power.

The upstream sinr that mobile terminal is connected to described Home eNodeB is:

${\mathrm{SINR}}_f^U\left(x\right)=\frac{P_0{h}_{f,0}^U{x}^{-{\mathrm{\α}}_0}}{{\mathrm{\Σ}}_{j\∈\mathrm{\Ω}\backslash \mathrm{\ΩfB}{S}_0}{P}_0{h}_j^U{\left|Z_j\right|}^{{-\mathrm{\α}}_0}+{\mathrm{\σ}}^2}$

Wherein, P ₀for the transmitting power of user, for user is to the rayleigh distributed parameter connecting Home eNodeB up path, x is the distance connecting Home eNodeB and user, α ₀for the loss index of user uplink, the connection base station of expression user j is not Home eNodeB fBS ₀, for the rayleigh distributed parameter of interference user j up path, Z _jfor interference user j is to Home eNodeB fBS ₀distance.

404, obtain described mobile terminal and be connected to the upstream sinr of described macro base station and descending SINR.

It should be understood that obtaining mobile terminal is connected to the upstream sinr of macro base station and descending SINR.

The upstream sinr that mobile terminal is connected to described macro base station is:

${\mathrm{SINR}}_m^U\left(x\right)=\frac{P_0{h}_m^U{x}^{-{\mathrm{\α}}_0}}{{\mathrm{\Σ}}_{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_m}{P}_0{h}_j^U{\left|Z_j\right|}^{{-\mathrm{\α}}_0}+{\mathrm{\σ}}^2}$

Wherein, for user is to the rayleigh distributed parameter of macro base station up path, for the rayleigh distributed parameter of interference user j up path, Z _jfor interference user j is to the distance of macro base station, j ∈ Ω Ω _mfor the connection base station representing user j is not macro base station;

The descending SINR that mobile terminal is connected to described macro base station is:

${\mathrm{SINR}}_m^D\left(x\right)=\frac{P_m{h}_m^D{x}^{-{\mathrm{\α}}_m}}{{\mathrm{\Σ}}_{i\∈\mathrm{\Φ}}{P}_f{h}_i^D{\left|Y_i\right|}^{{-\mathrm{\α}}_f}+{\mathrm{\σ}}^2}$

Wherein, P _mfor the transmitting power of macro base station, for the rayleigh distributed parameter of macro base station downlink path, x is the distance of macro base station and user, α _mfor the path loss index that macro base station is descending, i ∈ Ω represents that the connection base station of user i is Home eNodeB, P _ffor the transmitting power of Home eNodeB, for Home eNodeB i is to the rayleigh distributed parameter of user's downlink path, Y _ifor Home eNodeB i is to the distance of user, α _ffor the path loss index that Home eNodeB is descending.

405, obtain described mobile terminal and be connected to the up ergodic capacity of described Home eNodeB and descending ergodic capacity.

406, obtain described mobile terminal and be connected to the up ergodic capacity of described macro base station and descending ergodic capacity.

It should be understood that obtaining mobile terminal is connected to the up ergodic capacity of Home eNodeB and descending ergodic capacity, obtains mobile terminal and is connected to the up ergodic capacity of macro base station and descending ergodic capacity.

SINR can be referred to as:

$\mathrm{SINR}\left(x\right)=\frac{{\mathrm{Phx}}^{-\mathrm{\α}}}{Q+{\mathrm{\σ}}^2}$

Wherein, P is transmitting power, and h is the exponential distribution channel power of unit, and Q is the interference of receiving terminal, can by ergodic capacity of deriving below,

$R\stackrel{\mathrm{\Δ}}{=}{E}_{x,\mathrm{SINR}}\left[\mathrm{In}(1+\mathrm{SINR}\left(x\right))\right]={\∫}_0^{\∞}{E}_{\mathrm{SINR}}\left[\mathrm{In}(1+\mathrm{SINR}\left(x\right))\right]f_X\left(x\right)\mathrm{dx}$

F _xx () to be connected the probability-distribution function of base station spacing for user with it.

$\begin{array}{c}{E}_{\mathrm{SINR}}\left[\mathrm{In}(1+\mathrm{SINR}\left(x\right))\right]={\∫}_0^{\∞}\mathrm{Pr}\{\mathrm{In}(1+\mathrm{SINR}\left(x\right))>t\}\mathrm{dt}\\ ={\∫}_0^{\∞}\mathrm{Pr}\{h_m^D>x^{\mathrm{\α}}{P}^{-1}Q(e^t-1)\}\mathrm{dt}={\∫}_0^{\∞}\exp \{-x^{\mathrm{\α}}{P}^{-1}Q(e^t-1)\}\mathrm{dt}\\ ={\∫}_0^{\∞}\exp \{-x^{\mathrm{\α}}{P}^{-1}Q(e^y-1)\}\mathrm{dt}={\∫}_0^{\∞}{L}_Q\left(x^{\mathrm{\α}}{P}^{-1}(e^t-1)\right)\mathrm{dt}\\ \stackrel{\left(a\right)}{=}{\∫}_0^{\∞}{L}_Q\left(V\left(t\right)\right)\mathrm{dt}\end{array}$

Wherein (a) is Laplace transform, V (t)=x ^αp ^-1(e ^t-1), have respectively under four kinds of connections

$V_1\left(t\right)=x^{{\mathrm{\α}}_m}{P_m}^{-1}(e^t-1)V_2\left(t\right)=x^{{\mathrm{\α}}_0}{P_0}^{-1}(e^t-1)V_3\left(t\right)=x^{{\mathrm{\α}}_f}{P_f}^{-1}(e^t-1)V_4\left(t\right)=x^{{\mathrm{\α}}_0}{P_0}^{-1}(e^t-1),$

Corresponding Laplace transform is respectively:

$\begin{array}{c}{L}_{Q_1}\left(V_1\right)=E_{Q_1}\left[\exp \right\{{-Q}_1{V}_1\left\}\right]=E_{\mathrm{\Φ},\left\{h_i\right\}}\left[\underset{i\∈\mathrm{\Φ}}{\mathrm{\Π}}\exp \right\{{-P}_f{h}_i^D{\left|Y_i\right|}^{-{\mathrm{\α}}_f}{V}_1\left\}\right]\\ \stackrel{\left(a\right)}{=}{E}_{\mathrm{\Φ}}\left[\underset{i\∈\mathrm{\Φ}}{\mathrm{\Π}}\frac{1}{1+P_f{V}_1{\left|Y_i\right|}^{-{\mathrm{\α}}_f}}\right]\stackrel{\left(b\right)}{=}\exp (-2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}(1-\frac{1}{1+P_f{V}_1{y}^{-{\mathrm{\α}}_f}})\mathrm{dy})\\ =\exp (-2\mathrm{\π}{\mathrm{\λ}}_f{A}_1(x,t))\\ L_{Q_2}\left(V_2\right)=E_{Q_2}\left[\exp \right\{-Q_2{V}_2\left\}\right]=E_{\mathrm{\Ω},\left\{h_j^U\right\}}\left[\underset{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_m}{\mathrm{\Π}}\exp \right\{-P_0{h}_j^U{\left|Z_j\right|}^{-{\mathrm{\α}}_0}{V}_2\left\}\right]\\ \stackrel{\left(a\right)}{=}\left[\underset{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_m}{\mathrm{\Π}}\frac{1}{1+P_0{V}_2{\left|Z_j\right|}^{-{\mathrm{\α}}_0}}\right]\stackrel{\left(b\right)}{=}\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}(1-\frac{1}{1+P_0{V}_2{z}^{-{\mathrm{\α}}_f}})\mathrm{dz})\\ =\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{A}_2(x,t))\end{array}$

$\begin{array}{c}{L}_{Q_3}=E_{Q_3}\left[\exp \right\{{-Q}_3{V}_3\left\}\right]=E_{\mathrm{\Φ},h_m,\left\{h_i\right\},Y_m}\left[\exp \right\{P_m{h}_m^D{\left|Y_m\right|}^{-{\mathrm{\α}}_m}{V}_3\left\}\underset{i\∈\mathrm{\Φ}\backslash \mathrm{fB}{S}_0}{\mathrm{\Π}}\exp \right\{{-P}_f{h}_i^D{\left|Y_i\right|}^{-{\mathrm{\α}}_f}{V}_3\left\}\right]\\ \stackrel{\left(c\right)}{=}{E}_{Y_m}\left[\frac{1}{1+P_m{V}_3{\left|Y_m\right|}^{-{\mathrm{\α}}_m}}\right]E_{\mathrm{\Φ}}[\underset{i\∈\mathrm{\Φ}}{\mathrm{\Π}}\frac{1}{1+P_f{V}_3{\left|Y_i\right|}^{-{\mathrm{\α}}_f}}\\ =\frac{1}{R^2}{\∫}_0^R\left(\frac{2y}{1+P_m{V}_3{y}^{-{\mathrm{\α}}_m}}\right)\mathrm{dyexp}(-2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+{\left(P_f{V}_3\right)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy})\\ =\frac{1}{R^2}C(x,t)\exp (-2\mathrm{\π}{\mathrm{\λ}}_f{A}_3(x,t))\end{array}$

$\begin{array}{c}{L}_{Q_4}\left(V_4\right)=E_{Q_4}\left[\exp \right\{-Q_4{V}_4\left\}\right]=E_{\mathrm{\Ω},\left\{h_j^U\right\}}\left[\underset{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_{\mathrm{fB}{S}_0}}{\mathrm{\Π}}\exp \right\{-P_0{h}_j^U{\left|Z_j\right|}^{-{\mathrm{\α}}_0}{V}_4\left\}\right]\\ \stackrel{\left(a\right)}{=}{E}_{\mathrm{\Ω}}\left[\underset{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_{\mathrm{fB}{S}_0}}{\mathrm{\Π}}\frac{1}{1+P_0{V}_4{\left|Z_j\right|}^{-{\mathrm{\α}}_0}}\right]\stackrel{\left(b\right)}{=}\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}(1-\frac{1}{1+P_0{V}_4{z}^{-{\mathrm{\α}}_f}})\mathrm{dz})\\ =\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+{\left(P_0{V}_4\right)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})=\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{A}_4(x,t))\end{array}$

Can obtain (a) by h ~ exp (1), (b) can by the probability generating function of Poisson distribution show that (c) is because the distribution of Home eNodeB is independent of the distribution of macro base station and user.

The descending ergodic capacity that mobile terminal is connected to described Home eNodeB is:

$R_f^D=\frac{2\mathrm{\π}{\mathrm{\λ}}_f}{{\mathrm{\Δ}}_f^D{R}^2}{\∫}_0^R{\∫}_0^{\∞}x(1-\frac{{\hat{P}}^2{x}^{2{\mathrm{\α}}_f/{\mathrm{\α}}_m}}{R^2})\×C\left(t\right)\exp (-\mathrm{\π}{\mathrm{\λ}}_f{x}^2-A_3\left(t\right))\mathrm{dtdx}$

the probability of Home eNodeB is connected to for mobile terminal is descending, for macro base station and the ratio of Home eNodeB transmitting power, α _m/ α _ffor the ratio of the descending path loss index of macro base station and Home eNodeB;

$C\left(t\right)={\∫}_0^R\left(\frac{2y}{1+\hat{P}{x}^{{\mathrm{\α}}_m}(e^t-1)y^{{-\mathrm{\α}}_m}}\right)\mathrm{dy}$

$A_3\left(t\right)=2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+{\left(P_f{V}_3\right)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy}$

The up ergodic capacity that mobile terminal is connected to described Home eNodeB is:

$R_f^U=\frac{2\mathrm{\π}{\mathrm{\λ}}_f}{{\mathrm{\Δ}}_f^U}{\∫}_0^R{\∫}_0^{\∞}x(1-\frac{x^{2{\mathrm{\α}}_f/{\mathrm{\α}}_m}}{R^2})\×\exp (-\mathrm{\π}{\mathrm{\λ}}_f{x}^2-A_4\left(t\right))\mathrm{dtdx}$

the probability of Home eNodeB is connected to for mobile terminal is up;

$A_4\left(t\right)=\frac{1-e^t}{P_0{x}^{{-\mathrm{\α}}_0}/{\mathrm{\σ}}^2}-\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+x^{-{\mathrm{\α}}_0}{(e^t-1)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})$

The up ergodic capacity that mobile terminal is connected to described macro base station is:,

$R_m^U=\frac{2}{{\mathrm{\Δ}}_m^U{R}^2}{\∫}_0^R{\∫}_0^{\∞}\mathrm{xexp}(-\mathrm{\π}{\mathrm{\λ}}_f{x}^{2\widehat{\mathrm{\α}}}-A_2\left(t\right))\mathrm{dtdx}$

the probability of macro base station is connected to for mobile terminal is up;

$A_2\left(t\right)=-\exp (-2\mathrm{\π}{\mathrm{\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+x^{-{\mathrm{\α}}_0}{(e^t-1)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})$

The descending ergodic capacity that mobile terminal is connected to described macro base station is:

$R_m^D=\frac{2}{{\mathrm{\Δ}}_m^D{R}^2}{\∫}_0^R{\∫}_0^{\∞}\mathrm{xexp}(-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{x}^{2\widehat{\mathrm{\α}}}-A_1\left(t\right))\mathrm{dtdx}$

the probability of macro base station is connected to for mobile terminal is descending;

$A_1\left(t\right)=-2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+\hat{P}{x}^{-{\mathrm{\α}}_m}{(e^t-1)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy}.$

407, be connected to according to described mobile terminal is descending the descending ergodic capacity that the probability of described Home eNodeB, described mobile terminal are descendingly connected to the probability of described macro base station, the descending ergodic capacity that the descending SINR that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the descending SINR of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine downlink network total capacity.

Downlink network total capacity is:

$R^D={\mathrm{\Δ}}_m^D{R}_m^D+{\mathrm{\Δ}}_f^D{R}_f^D$

for mobile terminal is connected to the descending ergodic capacity of macro base station, the probability of macro base station is connected to for mobile terminal is descending, the probability of Home eNodeB is connected to for mobile terminal is descending, for mobile terminal is connected to the descending ergodic capacity of Home eNodeB;

408, be connected to according to described mobile terminal is up the up ergodic capacity that the probability of described Home eNodeB, described mobile terminal are uply connected to the probability of described macro base station, the up ergodic capacity that the upstream sinr that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the upstream sinr of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine uplink network total capacity.

Uplink network total capacity is:

$R^U={\mathrm{\Δ}}_m^U{R}_m^U+{\mathrm{\Δ}}_f^U{R}_f^U$

the probability of macro base station is connected to for mobile terminal is up, for mobile terminal is connected to the up ergodic capacity of macro base station, the probability of Home eNodeB is connected to for mobile terminal is up, for mobile terminal is connected to the up ergodic capacity of Home eNodeB.

The method of the acquisition network capacity provided by the present embodiment makes user access different optimum base stations flexibly in uplink and downlink, realizes the optimization of uplink downlink quality, effectively promotes descending and up ergodic capacity.

A kind of structural representation obtaining the device of network capacity that Fig. 5 provides for the embodiment of the present invention, as shown in Figure 5, the device of the acquisition network capacity of the present embodiment is as described below.

The device obtaining network capacity comprises acquiring unit 51 and determining unit 52.

Acquiring unit 51, for obtaining the distance between Home eNodeB and mobile terminal, determine descending probability and the up probability being connected to described Home eNodeB of described mobile terminal being connected to described Home eNodeB of described mobile terminal according to the distance between described Home eNodeB and mobile terminal.

Acquiring unit 51, also for obtaining the distance between macro base station and mobile terminal, determine descending probability and the up probability being connected to described macro base station of described mobile terminal being connected to described macro base station of described mobile terminal according to the distance between described macro base station and mobile terminal.

Acquiring unit 51, also to add with interference make an uproar than SINR and descending SINR for obtaining upward signal that described mobile terminal is connected to described Home eNodeB.

Acquiring unit 51, is also connected to the upstream sinr of described macro base station and descending SINR for obtaining described mobile terminal.

Acquiring unit 51, is also connected to the up ergodic capacity of described Home eNodeB and descending ergodic capacity for obtaining described mobile terminal.

Acquiring unit 51, is also connected to the up ergodic capacity of described macro base station and descending ergodic capacity for obtaining described mobile terminal.

Determining unit 52, for being connected to according to described mobile terminal is descending the descending ergodic capacity that the probability of described Home eNodeB, described mobile terminal are descendingly connected to the probability of described macro base station, the descending ergodic capacity that the descending SINR that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the descending SINR of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine downlink network total capacity.

Determining unit 52, also for being connected to according to described mobile terminal is up the up ergodic capacity that the probability of described Home eNodeB, described mobile terminal are uply connected to the probability of described macro base station, the up ergodic capacity that the upstream sinr that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the upstream sinr of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine uplink network total capacity.

The device of the acquisition network capacity provided by the present embodiment makes user access different optimum base stations flexibly in uplink and downlink, realizes the optimization of uplink downlink quality, effectively promotes descending and up ergodic capacity.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.

The above, be only the specific embodiment of the present invention, but; protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or substitute, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims (10)

1. a method for accessing terminal to network, is characterized in that, comprising:

Macro base station obtains mobile terminal to the ascending power of described macro base station and descending power, and described mobile terminal is sent to Sharing Management equipment between base station to the ascending power of described macro base station and descending power;

Home eNodeB obtains described mobile terminal to the ascending power of described Home eNodeB and descending power, and described mobile terminal is sent to Sharing Management equipment between described base station to the ascending power of described Home eNodeB and descending power;

Between described base station, Sharing Management equipment is according to the criterion preset, and determines the mode of described mobile terminal access base station, and the mode of described mobile terminal access base station is sent to described macro base station and described Home eNodeB, to make described connection of mobile terminal into network.

2. the method for accessing terminal to network according to claim 1, is characterized in that, described default criterion comprises maximal received power criterion.

3. the method for accessing terminal to network according to claim 1, is characterized in that, described default criterion comprises maximize SINR criterion.

4. a system for accessing terminal to network, is characterized in that, comprises macro base station, Home eNodeB, Sharing Management equipment between mobile terminal and base station;

Sharing Management devices interconnect between described macro base station and described base station;

Sharing Management devices interconnect between described Home eNodeB and described base station;

Described mobile terminal and described macro base station interconnected;

Described mobile terminal and described Home eNodeB interconnected.

5. obtain a method for network capacity, it is characterized in that, comprising:

Obtain the distance between Home eNodeB and mobile terminal, determine descending probability and the up probability being connected to described Home eNodeB of described mobile terminal being connected to described Home eNodeB of described mobile terminal according to the distance between described Home eNodeB and mobile terminal;

Obtain the distance between macro base station and mobile terminal, determine descending probability and the up probability being connected to described macro base station of described mobile terminal being connected to described macro base station of described mobile terminal according to the distance between described macro base station and mobile terminal;

Obtain upward signal that described mobile terminal is connected to described Home eNodeB to add with interference and make an uproar than SINR and descending SINR;

Obtain described mobile terminal and be connected to the upstream sinr of described macro base station and descending SINR;

Obtain described mobile terminal and be connected to the up ergodic capacity of described Home eNodeB and descending ergodic capacity;

Obtain described mobile terminal and be connected to the up ergodic capacity of described macro base station and descending ergodic capacity;

Be connected to according to described mobile terminal is descending the descending ergodic capacity that the probability of described Home eNodeB, described mobile terminal are descendingly connected to the probability of described macro base station, the descending ergodic capacity that the descending SINR that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the descending SINR of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine downlink network total capacity;

Be connected to according to described mobile terminal is up the up ergodic capacity that the probability of described Home eNodeB, described mobile terminal are uply connected to the probability of described macro base station, the up ergodic capacity that the upstream sinr that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the upstream sinr of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine uplink network total capacity.

6. the method for acquisition network capacity according to claim 5, is characterized in that, the descending probability being connected to described Home eNodeB of described mobile terminal is:

${\mathrm{\Δ}}_f^D=\frac{2}{R^2}{\∫}_0^R(1-e^{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}})\mathrm{rdr}$

The up probability being connected to described Home eNodeB of described mobile terminal is:

${\mathrm{\Δ}}_f^U=\frac{2}{R^2}{\∫}_0^R(1-e^{-\mathrm{\π}{\mathrm{\λ}}_f{r}^{2\widehat{\mathrm{\α}}}})\mathrm{rdr}$

The descending probability being connected to described macro base station of described mobile terminal is:

${\mathrm{\Δ}}_m^D=\frac{2}{R^2}{\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{\hat{P}}^{-1}{r}^{2\widehat{\mathrm{\α}}}\}\mathrm{rdr}$

The up probability being connected to described macro base station of described mobile terminal is:

${\mathrm{\Δ}}_m^U=\frac{2}{R^2}{\∫}_0^R\exp \{-\mathrm{\π}{\mathrm{\λ}}_f{r}^{2\widehat{\mathrm{\α}}}\}\mathrm{rdr}$

Wherein, R is macro base station radius of society, λ _ffor Home eNodeB Poisson's point distribution density, for macro base station and the ratio of Home eNodeB transmitting power, for the ratio of the descending path loss index of macro base station and Home eNodeB, r is the variable of the distance between user and macro base station.

7. the method for acquisition network capacity according to claim 5, is characterized in that, the descending SINR that described mobile terminal is connected to described Home eNodeB is:

${\mathrm{SINR}}_f^D\left(x\right)=\frac{P_f{h}_{f,0}^D{x}^{-{\mathrm{\α}}_f}}{P_m{h}_m^D{\left|Y_m\right|}^{{-\mathrm{\α}}_m}+{\mathrm{\Σ}}_{i\∈\mathrm{\Φ}\backslash f{\mathrm{BS}}_0}{P}_f{h}_i^D{\left|Y_i\right|}^{{-\mathrm{\α}}_f}+{\mathrm{\σ}}^2}$

Wherein, P _mfor the transmitting power of macro base station, for the rayleigh distributed parameter of macro base station downlink path, Y _mfor the distance of macro base station and user, P _ffor the transmitting power of Home eNodeB, for connecting the rayleigh distributed parameter of Home eNodeB downlink path, x is the distance connecting Home eNodeB and user, α _ffor the path loss index that Home eNodeB is descending, i ∈ Φ fBS ₀represent that Home eNodeB i connects base station, for the rayleigh distributed parameter of interference Home eNodeB i downlink path, Y _ifor disturbing the distance of Home eNodeB i and user, σ ²for additive Gaussian noise power;

The upstream sinr that described mobile terminal is connected to described Home eNodeB is:

${\mathrm{SINR}}_f^U\left(x\right)=\frac{P_0{h}_{f,0}^U{x}^{{-\mathrm{\α}}_0}}{{\mathrm{\Σ}}_{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_{{\mathrm{fBS}}_0}}{P}_0{h}_j^U{\left|Z_j\right|}^{{-\mathrm{\α}}_0}+{\mathrm{\σ}}^2}$

Wherein, P ₀for the transmitting power of user, for user is to the rayleigh distributed parameter connecting Home eNodeB up path, x is the distance connecting Home eNodeB and user, α ₀for the loss index of user uplink, the connection base station of expression user j is not Home eNodeB fBS ₀, for the rayleigh distributed parameter of interference user j up path, Z _jfor interference user j is to Home eNodeB fBS ₀distance;

The upstream sinr that described mobile terminal is connected to described macro base station is:

${\mathrm{SINR}}_m^U\left(x\right)=\frac{P_0{h}_m^U{x}^{{-\mathrm{\α}}_0}}{{\mathrm{\Σ}}_{j\∈\mathrm{\Ω}\backslash {\mathrm{\Ω}}_m}{P}_0{h}_j^U{\left|Z_j\right|}^{{-\mathrm{\α}}_0}+{\mathrm{\σ}}^2}$

Wherein, for user is to the rayleigh distributed parameter of macro base station up path, for the rayleigh distributed parameter of interference user j up path, Z _jfor interference user j is to the distance of macro base station, j ∈ Ω Ω _mfor the connection base station representing user j is not macro base station;

The descending SINR that described mobile terminal is connected to described macro base station is:

${\mathrm{SINR}}_m^D\left(x\right)=\frac{P_m{h}_m^D{x}^{{-\mathrm{\α}}_m}}{{\mathrm{\Σ}}_{i\∈\mathrm{\Φ}}{P}_f{h}_i^D{\left|Y_i\right|}^{{-\mathrm{\α}}_f}+{\mathrm{\σ}}^2}$

Wherein, P _mfor the transmitting power of macro base station, for the rayleigh distributed parameter of macro base station downlink path, x is the distance of macro base station and user, α _mfor the path loss index that macro base station is descending, i ∈ Ω represents that the connection base station of user i is Home eNodeB, P _ffor the transmitting power of Home eNodeB, for Home eNodeB i is to the rayleigh distributed parameter of user's downlink path, Y _ifor Home eNodeB i is to the distance of user, α _ffor the path loss index that Home eNodeB is descending.

8. the method for acquisition network capacity according to claim 5, is characterized in that, the descending ergodic capacity that described mobile terminal is connected to described Home eNodeB is:

$R_f^D=\frac{{2\mathrm{\π\λ}}_f}{{\mathrm{\Δ}}_f^D{R}^2}{\∫}_0^R{\∫}_0^{\∞}x(1-\frac{{\hat{P}}^2{x}^{2{\mathrm{\α}}_f/{\mathrm{\α}}_m}}{R^2})\×C\left(t\right)\exp ({-\mathrm{\π\λ}}_f{x}^2-A_3\left(t\right))\mathrm{dtdx}$

the probability of Home eNodeB is connected to for mobile terminal is descending, for macro base station and the ratio of Home eNodeB transmitting power, α _m/ α _ffor the ratio of the descending path loss index of macro base station and Home eNodeB;

$C\left(t\right)={\∫}_0^R\left(\frac{2y}{1+\hat{P}{x}^{{\mathrm{\α}}_m}(e^t-1)y^{-{\mathrm{\α}}_m}}\right)\mathrm{dy}$

$A_3\left(t\right)=2\mathrm{\π}{\mathrm{\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+{\left(P_f{V}_3\right)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy}$

The up ergodic capacity that described mobile terminal is connected to described Home eNodeB is:

$R_f^U=\frac{{2\mathrm{\π\λ}}_f}{{\mathrm{\Δ}}_f^U}{\∫}_0^R{\∫}_0^{\∞}x(1-\frac{x^{{2\mathrm{\α}}_f/{\mathrm{\α}}_m}}{R^2})\×\exp (-{\mathrm{\π\λ}}_f{x}^2{A}_4\left(t\right))\mathrm{dtdx}$

the probability of Home eNodeB is connected to for mobile terminal is up;

$A_4\left(t\right)=\frac{1-e^t}{P_0{x}^{{-\mathrm{\α}}_0}/{\mathrm{\σ}}^2}-\exp (-2{\mathrm{\π\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+x^{-{\mathrm{\α}}_0}{(e^t-1)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})$

The up ergodic capacity that described mobile terminal is connected to described macro base station is:,

$R_m^U=\frac{2}{{\mathrm{\Δ}}_m^U{R}^2}{\∫}_0^R{\∫}_0^{\∞}\mathrm{xexp}({-\mathrm{\π\λ}}_f{x}^{2\widehat{\mathrm{\α}}}-A_2\left(t\right))\mathrm{dtdx}$

the probability of macro base station is connected to for mobile terminal is up;

$A_2\left(t\right)=-\exp (-{2\mathrm{\π\λ}}_0{\∫}_0^{\∞}\left(\frac{z}{1+x^{-{\mathrm{\α}}_0}{(e^t-1)}^{-1}{z}^{{\mathrm{\α}}_f}}\right)\mathrm{dz})$

The descending ergodic capacity that described mobile terminal is connected to described macro base station is:

the probability of macro base station is connected to for mobile terminal is descending;

$A_1\left(t\right)=-{2\mathrm{\π\λ}}_f{\∫}_0^{\∞}\left(\frac{y}{1+\hat{P}{x}^{{-\mathrm{\α}}_m}{(e^t-1)}^{-1}{y}^{{\mathrm{\α}}_f}}\right)\mathrm{dy}.$

9. the method for acquisition network capacity according to claim 5, is characterized in that, described downlink network total capacity is:

$R^D={\mathrm{\Δ}}_m^D{R}_m^D+{\mathrm{\Δ}}_f^D{R}_f^D$

for mobile terminal is connected to the descending ergodic capacity of macro base station, the probability of macro base station is connected to for mobile terminal is descending, the probability of Home eNodeB is connected to for mobile terminal is descending, for mobile terminal is connected to the descending ergodic capacity of Home eNodeB;

Described uplink network total capacity is:

$R^U={\mathrm{\Δ}}_m^U{R}_m^U+{\mathrm{\Δ}}_f^U{R}_f^U$

the probability of macro base station is connected to for mobile terminal is up, for mobile terminal is connected to the up ergodic capacity of macro base station, the probability of Home eNodeB is connected to for mobile terminal is up, for mobile terminal is connected to the up ergodic capacity of Home eNodeB.

10. obtain a device for network capacity, it is characterized in that, described device comprises acquiring unit and determining unit;

Described acquiring unit, for obtaining the distance between Home eNodeB and mobile terminal, determine descending probability and the up probability being connected to described Home eNodeB of described mobile terminal being connected to described Home eNodeB of described mobile terminal according to the distance between described Home eNodeB and mobile terminal;

Described acquiring unit, also for obtaining the distance between macro base station and mobile terminal, determine descending probability and the up probability being connected to described macro base station of described mobile terminal being connected to described macro base station of described mobile terminal according to the distance between described macro base station and mobile terminal;

Described acquiring unit, also to add with interference make an uproar than SINR and descending SINR for obtaining upward signal that described mobile terminal is connected to described Home eNodeB;

Described acquiring unit, is also connected to the upstream sinr of described macro base station and descending SINR for obtaining described mobile terminal;

Described acquiring unit, is also connected to the up ergodic capacity of described Home eNodeB and descending ergodic capacity for obtaining described mobile terminal;

Described acquiring unit, is also connected to the up ergodic capacity of described macro base station and descending ergodic capacity for obtaining described mobile terminal;

Described determining unit, for being connected to according to described mobile terminal is descending the descending ergodic capacity that the probability of described Home eNodeB, described mobile terminal are descendingly connected to the probability of described macro base station, the descending ergodic capacity that the descending SINR that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the descending SINR of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine downlink network total capacity;

Described determining unit, also for being connected to according to described mobile terminal is up the up ergodic capacity that the probability of described Home eNodeB, described mobile terminal are uply connected to the probability of described macro base station, the up ergodic capacity that the upstream sinr that described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to the upstream sinr of described macro base station, described mobile terminal is connected to described Home eNodeB, described mobile terminal are connected to described macro base station, determine uplink network total capacity.