CN106535200A - QoS optimization method based on overlay network - Google Patents

Abstract

The invention provides a QoS optimization method based on an overlay network, aiming at the problem that the overlay network is hard to realize QoS coordinative optimization. The QoS optimization method based on an overlay network can realize QoS elastic optimization management of the overlay network by dynamically adjusting the overlay network capacity and establishing a QoS optimization model.

Description

A kind of QoS optimization methods based on laminated network

Technical field

The present invention relates to communication network field, more particularly to queueing theory, and optimum theory.

Background technology

In wireless network, requirement of the different business to time delay and service quality is different, for there is certain quality of service How the business of requirement, the resource of wireless network are allocated and face new challenges.

While heterogeneous hierarchical wireless network provides the business service of maneuverability for people, many problems are also brought. As radio spectrum resources are deficient, independent frequency spectrum resource cannot be distributed for each heterogeneous nodes, complicated heterogeneous hierarchical without There is serious interference under line network environment, and these interference will have a strong impact on the performance of communication system, deteriorate the service of user Quality.Meanwhile, disposing substantial amounts of heterogeneous nodes will increase the overall energy consumption of network, carry out efficient energy consumption from the angle of efficiency optimization Management, reduces operation cost and the impact to environment, and asking of solving of following heterogeneous hierarchical wireless network development need emphasis Topic.But, traditional interference management and control technology primarily focus on wireless link level, but in heterogeneous hierarchical wireless network Cross-layers interference of many interference between heterogeneous nodes, this results in efficient interference coordination technique, and to must adapt to layering different Complicated wireless environment and user behavior in structure wireless network, a kind of typical laminated network structure are as shown in Figure 1.

In order to improve the networking performance of heterogeneous hierarchical wireless network, using based on cognitive and collaboration dynamic radio resource pipe Reason and interference control technology.Some scholars analyze the transmission performance of heterogeneous hierarchical wireless access network and collaboration relay system, but Still mainly stress diversity performance, and how the diversity performance of approximation theory is needed to corresponding radio resource allocation and networking skill Art is studied, and the layered heterogeneous network schematic diagram using cell extension technology is as shown in Figure 2.Other part scholar give base In the framework of the heterogeneous radio access networks of cognitive techniquess, and propose the movement of frequency spectrum perception, frequency spectrum judging, frequency spectrum share and frequency spectrum Property etc. crucial technological challenge.Some scholars propose the principle and function of wireless network self-organizing technique first and to existing Impact of agreement etc., the self organizing function requirement for heterogeneous wireless network provide research direction, but correlation is ground and made internal disorder or usurp also in rising Step state.Cover and dynamic multidimensional RRM as heterogeneous hierarchical wireless network is related to collaboration, cognitive, multilamellar, and show Some research also stresses the research of single theoretical and single technology, does not go deep into high spectrum advanced under deployment analysis heterogeneous wireless network Effect and power-efficient features.On the other hand, the mode of current fixed frequency spectrum distribution can not meet growing data transfer Demand, therefore heterogeneous hierarchical wireless network needs are by dynamic, flexible mode configuring spectrum between heterogeneous nodes.In layering In heterogeneous wireless network, a part of user can be allowed to carry out data transmission by the occupancy frequency spectrum of cognitive and opportunistic, to improve The availability of frequency spectrum.In recent years, scholars are directed to different application scene and different transmission mode, from all angles in wireless scene Cognitive techniquess expand research, it is proposed that the algorithm of various perceived spectral occupancy situations, such as matching matrix, cyclo-stationary inspection Survey method and energy measuring method etc., to lift QoS abilities.

Therefore, in heterogeneous hierarchical wireless network, QoS supportabilitys are the important contents of future studies, it is necessary to designed A kind of QoS optimization methods based on laminated network.

The content of the invention

The technical problem to be solved is：By dynamic regulation laminated network capacity, and set up Power Control machine Make and set up QoS Optimized models, realize the QoS elasticity optimum managements of laminated network.

The present invention is comprised the following steps by solving the technical scheme that above-mentioned technical problem is adopted, as shown in Figure 3：

A, dynamic regulation laminated network capacity, and set up power control mechanism；

B, set up QoS Optimized models.

In step A, specially：Wherein x_mFor grand user equipment, k is sub-channel identification,Based on upgrade node m exist The through-put power of subchannel k,Based on upgrade node m subchannel k power gain,For x_mWith main upgrade node m it Between the path losing probability that is transmitted using channel subchannel k, PL_outdoorThe energy loss for producing is lost for outdoor path,It is from main upgrade node m to x_mBetween subchannel k Signal to Interference plus Noise Ratio, d is ownership upgrade node and x_mBetween Euclidean Distance,The maximum capacity being transmitted using subchannel k between the ownership upgrade node serviced for FUE and to which, N₀For Noise power spectral density average, M are multiple main upgrade node set, and F is the interference set of multiple main upgrade nodes,For Interference control node y_fThe path losing probability being transmitted using subchannel k between interfering nodes f,It is from upgrading section Point y_mInterference control node y_fTo interfering nodes f subchannel k transmission capacity,For the spectral coefficient in network, C_avgFor average network capacity, C is channel capacity, and W is channel width, and BER is bit error rate, and △ B are subcarrier bandwidth,For Through-put powers of the main upgrade node m ' ∈ M ' outside independently of M in subchannel k,Based on upgrade node m interference f in sub- letter The power of road k,For x_mThe path losing probability being transmitted using subchannel k between main upgrade node m ' ∈ M ',For disturbing control node y_fThe path losing probability being transmitted using subchannel k between main upgrade node m,For Interference control node y_fThe indoor path being transmitted using subchannel k and the interference f ' ∈ F ' of main upgrade node m ' ∈ M ' between Losing probability,It is from interfering nodes f to from upgrade node y_mInterference control node y_fBetween the letter of subchannel k dry make an uproar Than,It is interfering nodes f to from upgrade node y_mInterference control node y_fBetween subchannel k transmission capacity, It is from interfering nodes f to from upgrade node y_mBetween subchannel k Signal to Interference plus Noise Ratio, interference control node be located at fly phone user end It is interior,

PL_outdoor=28+35log₁₀(d)

In step A, power control mechanism is：A. subchannel occupancy situation is intercepted, if PU is not present, CU is with bigger Power carries out data is activation, if PU is present, enables Poewr control method, and notifies that remaining node channel will in interference range It is occupied；B. obtain in interference covering domain while accessing all CU status informations of the channel, and obtain it to PU and arrive The channel gain set of next-hop node CU；C. get parmsWhereinIt is 0 for average, Normally distributed random variable of the variance for σ, d₀For CU_iTo the distance of primary user PU, d₁For CU_iTo CU_jDistance, g₀For CU_iExtremely The path loss of primary user PU, g₁For CU_iTo CU_jPath loss；D. obtain optimal transmission power P and data biography is carried out with P Defeated, CU is from user.

In step B, specially：Set up QoS Optimized models:

Wherein N is the node set in network, N_iFor the single-hop adjacent node set of node i, I_iFor the interference section of node i Point set, L are number of available channels, and P=N × N is node to set, p^src,p^dstRespectively source node and purpose of the node to p Node,h_i,m_ij,Decision variable is, if Business Stream is transferred to node j from node i,Otherwise thenThe h if node i is cluster head_i=1, on the contrary then h_i=0, if node i is certain section in the middle of the cluster with node j as cluster head Put then m_ij=1, on the contrary then m_ij=0, if node k is as the bridging device between leader cluster node i and leader cluster node j Otherwise thenIf leader cluster node i is carried out data transmission using channel lOtherwise thenIf leader cluster node i with Leader cluster node j is carried out data transmission then using channel l simultaneouslyOtherwise thenThe h if node j is cluster head_j=1, instead Then h_j=0, i ≠ j.

Description of the drawings

Fig. 1 typical case's stacking network management schematic diagrams

Layered heterogeneous network schematic diagrams of the Fig. 2 using cell extension technology

QoS Optimizing Flow schematic diagrams of the Fig. 3 based on laminated network

Specific embodiment

For reaching above-mentioned purpose, technical scheme is as follows：

The first step, dynamic regulation laminated network capacity, and power control mechanism is set up, specially wherein x_mSet for grand user Standby, k is sub-channel identification,Based on upgrade node m subchannel k through-put power,Based on upgrade node m in subchannel The power gain of k,For x_mThe path losing probability being transmitted using channel subchannel k between main upgrade node m, PL_outdoorThe energy loss for producing is lost for outdoor path,It is from main upgrade node m to x_mBetween subchannel k letter Dry ratio of making an uproar, d are ownership upgrade node and x_mBetween Euclidean distance,For FUE and the ownership upgrade node serviced by which it Between the maximum capacity that is transmitted using subchannel k, N₀For noise power spectral density average, M is multiple main upgrade node set, F is the interference set of multiple main upgrade nodes,For disturbing control node y_fSubchannel k is used between interfering nodes f The path losing probability being transmitted,It is from upgrade node y_mInterference control node y_fTo interfering nodes f in subchannel k Transmission capacity,For the spectral coefficient in network, C_avgFor average network capacity, C is channel capacity, and W is channel strip Width, BER are bit error rate, and △ B are subcarrier bandwidth,Be independently of M outside main upgrade node m ' ∈ M ' in subchannel k Through-put power,Based on upgrade node m interference f subchannel k power,For x_mBetween main upgrade node m ' ∈ M ' The path losing probability being transmitted using subchannel k,For disturbing control node y_fUsing son between main upgrade node m The path losing probability that channel k is transmitted,For disturbing control node y_fWith the interference f ' ∈ of main upgrade node m ' ∈ M ' The indoor path losing probability being transmitted using subchannel k between F ',It is from interfering nodes f to from upgrade node y_mInterference control node y_fBetween subchannel k Signal to Interference plus Noise Ratio,It is interfering nodes f to from upgrade node y_mInterference control Node y processed_fBetween subchannel k transmission capacity,It is from interfering nodes f to from upgrade node y_mBetween subchannel k Signal to Interference plus Noise Ratio, interference control node are located at and fly in phone user end,

Second step, power control mechanism is：A. subchannel occupancy situation is intercepted, if PU is not present, CU is with more high-power Data is activation is carried out, if PU is present, Poewr control method is enabled, and is notified that remaining node channel will be occupied in interference range With；B. obtain in interference covering domain while accessing all CU status informations of the channel, and obtain it to PU and arrive next The channel gain set of hop node CU；C. get parmsWhereinIt is 0 for average, variance For the normally distributed random variable of σ, d₀For CU_iTo the distance of primary user PU, d₁For CU_iTo CU_jDistance, g₀For CU_iIt is extremely primary The path loss of family PU, g₁For CU_iTo CU_jPath loss；D. obtain optimal transmission power P and carried out data transmission with P, CU It is from user.

3rd step, sets up QoS Optimized models:

Wherein N is the node set in network, N_iFor the single-hop adjacent node set of node i, I_iFor the interference section of node i Point set, L are number of available channels, and P=N × N is node to set, p^src,p^dstRespectively source node and purpose of the node to p Node,Decision variable is, if Business Stream is transferred to node j from node i,Otherwise thenThe h if node i is cluster head_i=1, on the contrary then h_i=0, if node i is certain section in the middle of the cluster with node j as cluster head Put then m_ij=1, on the contrary then m_ij=0, if node k is as the bridging device between leader cluster node i and leader cluster node j Otherwise thenIf leader cluster node i is carried out data transmission using channel lOtherwise thenIf leader cluster node i with Leader cluster node j is carried out data transmission then using channel l simultaneouslyOtherwise thenThe h if node j is cluster head_j=1, instead Then h_j=0, i ≠ j.

The present invention proposes a kind of QoS optimization methods based on laminated network, by dynamic regulation laminated network capacity and QoS Optimized models are set up, the QoS elasticity optimum managements of laminated network are realized.

Claims (4)

1. a kind of QoS optimization methods based on laminated network, optimize mould by dynamic regulation laminated network capacity with QoS is set up Type, realizes the QoS elasticity optimum managements of laminated network, comprises the steps：

A, dynamic regulation laminated network capacity, and set up power control mechanism；

B, set up QoS Optimized models.

2. method according to claim 1, for step A it is characterized in that：Specially：Wherein x_mFor grand user equipment, k For sub-channel identification,Based on upgrade node m subchannel k through-put power,Based on upgrade node m in subchannel k Power gain,For x_mThe path losing probability being transmitted using channel subchannel k between main upgrade node m, PL_outdoorThe energy loss for producing is lost for outdoor path,It is from main upgrade node m to x_mBetween subchannel k letter Dry ratio of making an uproar, d are ownership upgrade node and x_mBetween Euclidean distance,For FUE and the ownership upgrade node serviced by which it Between the maximum capacity that is transmitted using subchannel k, N₀For noise power spectral density average, M is multiple main upgrade node set, F is the interference set of multiple main upgrade nodes,For disturbing control node y_fSubchannel k is used between interfering nodes f The path losing probability being transmitted,It is from upgrade node y_mInterference control node y_fTo interfering nodes f in subchannel k Transmission capacity,For the spectral coefficient in network, C_avgFor average network capacity, C is channel capacity, and W is channel strip Width, BER are bit error rate, and △ B are subcarrier bandwidth,Be independently of M outside main upgrade node m ' ∈ M ' in subchannel k Through-put power,Based on upgrade node m interference f subchannel k power,For x_mBetween main upgrade node m ' ∈ M ' The path losing probability being transmitted using subchannel k,For disturbing control node y_fUsing son between main upgrade node m The path losing probability that channel k is transmitted,For disturbing control node y_fWith the interference f ' ∈ of main upgrade node m ' ∈ M ' The indoor path losing probability being transmitted using subchannel k between F ',It is from interfering nodes f to from upgrade node y_mInterference control node y_fBetween subchannel k Signal to Interference plus Noise Ratio,It is interfering nodes f to from upgrade node y_mInterference control Node y processed_fBetween subchannel k transmission capacity,It is from interfering nodes f to from upgrade node y_mBetween subchannel k Signal to Interference plus Noise Ratio, interference control node are located at and fly in phone user end,

${\mathrm{SINR}}_{x_m,m}^k=\frac{P_m^k{h}_{x_m,m}^k{G}_{x_{m,}m}^k}{N_0\mathrm{\Δ}B+{\mathrm{\Σ}}_{m^{\′}\∈M^{\′}}{P}_{m^{\′}}^k{h}_{x_m,m^{\′}}^k{G}_{x_m,m^{\′}}^k+{\mathrm{\Σ}}_{f\∈F}{P}_f^k{G}_{x_m,f}^k}$

$G_{x_m,m}^k={10}^{-{\mathrm{PL}}_{outdoor}/10}$

PL_outdoor=28+35log₁₀(d)

$C_{y_{m,}m}^k=(\mathrm{\Δ}B.{\log }_2(1+{\mathrm{\αSINR}}_{y_m,m}^k\left)\right)$

$\mathrm{\α}=\frac{-1.5}{ln\left(5XBER\right)}$

${\mathrm{SINR}}_{y_f,f}^k=\frac{P_f^k{G}_{y_{f,}f}^k}{N_0\mathrm{\Δ}B+{\Σ}_{m\∈M}{P}_m^k{h}_{y_f,m}^k{G}_{y_f,m}^k+{\Σ}_{f^{\′}\∈F^{\′}}{P}_f^k{G}_{y_f,f^{\′}}^k}$

$C_{y_f,f}^k=(\mathrm{\Δ}B.{\log }_2(1+{\mathrm{\αSINR}}_{y_f,f}^k\left)\right).$

3. method according to claim 1, for step A it is characterized in that：Power control mechanism is：A. intercept subchannel Occupancy situation, if PU is not present, CU carries out data is activation with more high-power, if PU is present, enables Poewr control method, and Notify that remaining node channel will be occupied in interference range；B. obtain in interference covering domain while accessing all of the channel CU status informations, and it is obtained to PU and the channel gain set to next-hop node CU；C. get parmsWhereinIt is 0 for average, normally distributed random variable of the variance for σ, d₀For CU_iTo master The distance of user PU, d₁For CU_iTo CU_jDistance, g₀For CU_iTo the path loss of primary user PU, g₁For CU_iTo CU_jPath damage Consumption；D. obtain optimal transmission power P and carried out data transmission with P, CU is from user.

4. method according to claim 1, for step B it is characterized in that：Set up QoS Optimized models:

$\begin{array}{cc}min& \underset{i\∈N}{\Σ}\underset{j\∈N_i}{\Σ}\underset{p\∈P}{\Σ}{f}_{ij}^p\end{array}$

$\begin{array}{cc}\∀i,j\∈N_i,\∀p:& f_{ij}^p\≤m_{ji}+m_{ij}\end{array}$

$\begin{array}{cc}\∀i,j\∈N_i,\∀p:& f_{ij}^p\≤2-h_i+h_j\end{array}$

$\begin{array}{cc}\∀i,j\∈N_i,\∀p:& f_{ij}^p\≤h_i+h_j\end{array}$

$\begin{array}{cc}\∀i,j\∈N_i:& h_i+h_j\≤1\end{array}$

$\begin{array}{cc}\∀i,j\∈N_i:& m_{ji}\≤h_i\end{array}$

$\begin{array}{cc}\∀i:& 1-h_i\≤\underset{j\∈N_i}{\Σ}{m}_{ij}\≤2\·(1-h_i)\end{array}$

$\begin{array}{cc}\&ForAll;i,j<i:& b_{ij}^k=m_{ki}\&CenterDot;m_{kj}\end{array}$

$\begin{array}{cc}\&ForAll;i,j<i:& \underset{k\&Element;N_j}{\underset{k\&Element;N_i}{\&Sigma;}}{b}_{ij}^k\&le;1\end{array}$

$\begin{array}{cc}\&ForAll;i,j,l:& y_{ij}^k=x_i^l\&CenterDot;x_j^l\end{array}$

$\begin{array}{cc}\&ForAll;i,j\&Element;I_i,l:& y_{ij}^l=0\end{array}$

Wherein N is the node set in network, N_iFor the single-hop adjacent node set of node i, I_iFor the interfering nodes collection of node i Close, L is number of available channels, and P=N × N is node to set, p^src,p^dstRespectively source node and purpose section of the node to p Point,Decision variable is, if Business Stream is transferred to node j from node i,Otherwise thenThe h if node i is cluster head_i=1, on the contrary then h_i=0, if node i is certain section in the middle of the cluster with node j as cluster head Put then m_ij=1, on the contrary then m_ij=0, if node k is as the bridging device between leader cluster node i and leader cluster node j Otherwise thenIf leader cluster node i is carried out data transmission using channel lOtherwise thenIf leader cluster node i with Leader cluster node j is carried out data transmission then using channel l simultaneouslyOtherwise thenThe h if node j is cluster head_j=1, instead Then h_j=0, i ≠ j.