CN104270804A - A base station energy-saving method and energy-saving system based on data cache - Google Patents

Abstract

The invention relates to a base station energy saving method and system based on data caching. The system comprises a base station configuration module, a service source module, an access control module, a resource dispatching module and a result statistics module, wherein the base station configuration module is used for configuring essential information, in a base station, of users, the service source module is used for generating data packets of several users according to the essential information, the access control module is used for determining the number of the users and achieving access control over the users, the resource dispatching module is used for carrying out resource dispatching on the data packets of the users, and the result statistics module is used for carrying out result statistics after resource dispatching is completed and the users succeed in receiving data. The base station energy saving method and system based on data caching have the advantages that resources and energy are effectively saved under low loads, the network efficiency is greatly improved under low loads, waste of resources and energy is reduced, and when the service volume is small, the RB resource of the system can be fully utilized by sending data which have been cached for a period of time.

Description

A kind of base station energy-saving method based on data buffer storage and energy conserving system

Technical field

The present invention relates to a kind of base station energy-saving method based on data buffer storage and energy conserving system, belong to communication technical field.

Background technology

Business due to cellular cell has the feature of Time-spatial diversion.Offered load in one day has only about half of under low loading condition, but in order to meet the user data rate of peak time, system still needs to configure by full load amount, and this just causes the waste causing resource and energy during low load, makes network efficiency on the low side when low load.And the waste that the time domain time turns off, frequency domain bandwidth self adaptation two kinds of technology can reduce energy under low load conditions.

Based on the power-saving technology of the green communications system of time domain, main thought just determines the closedown of base station in time domain and running scheme by the weight of load, when network is for high capacity, base station is also operation at full load certainly, and corresponding time domain is exactly base station PA transmission different continuously.When offered load is low, most of data channel is all in idle condition, and now business sends by times, i.e. discontinuous transmission, when not sending business information, turns off by PA; Territory power-saving technology is based on the quiescent dissipation of power amplifier and the linear principle of system bandwidth, and less bandwidth needs less radiant power.From the angle of Resourse Distribute, the RB number distributed is relevant with required transmitted data amount, limit the number of schedulable RB, can limit from time-domain, also can from frequency domain higher limit, in order to reach energy-conservation object, by analysis, the energy consumption of system reduces, so time-frequency power-saving technology is combined consideration by us with the increase distributing PRB number, distribution frequency domain resource more than should trying one's best, reallocation time-domain resource.

Summary of the invention

In order to make network improve service efficiency when low load, the invention provides a kind of base station energy-saving method based on data buffer storage and energy conserving system.The technical solution adopted for the present invention to solve the technical problems is: a kind of energy-saving system of base station based on data buffer storage, comprises, base station configuration module, for the essential information of user in configurating base station; Service source module, for producing the packet of some described users according to described essential information; Access control module, for determining the quantity of described user and carrying out access control to described user; Scheduling of resource module, for carrying out scheduling of resource to the packet of described user; Result statistical module, for after scheduling of resource, described user's successful data reception, carries out result statistics.

Further, it is a unit that described scheduling of resource module is used for every 100ms, by data buffer storage a period of time, then the data of buffer memory is sent in remaining time.

Further, described result statistical module is for adding up time delay and the efficiency of user described in each under the different length of one's sleep.

Based on a base station energy-saving method for data buffer storage, comprise the steps,

Step 1) essential information of user in configurating base station;

Step 2) packet of some described users is produced according to described essential information;

Step 3) determine the quantity of described user and access control is carried out to described user;

Step 4) scheduling of resource is carried out to the packet of described user;

Step 5) scheduling of resource, after described user's successful data reception, carry out result statistics.

Further, described step 4) specifically comprise, be a unit with every 100ms, by data buffer storage a period of time, then in remaining time, the data of buffer memory sent.

Further, described step 5) specifically comprise, add up time delay and the efficiency of user described in each under the different length of one's sleep.

Benefit of the present invention is: effectively save resource and energy during low load, network efficiency is greatly improved when low load, decrease the waste of resource and the energy, when traffic carrying capacity is little, the data after buffer memory a period of time are carried out send the RB resource that can make full use of system.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of the energy-saving system of base station that the present invention is based on data buffer storage;

Fig. 2 is the schematic flow sheet of the base station energy-saving method that the present invention is based on data buffer storage;

Fig. 3 is traditional DTX power-saving technology resource allocation map;

Fig. 4 is degree of depth DTX technical resource distribution diagram;

Fig. 5 is degree of depth DTX flow chart;

Fig. 6 is the V that different CQI is corresponding_maxand the length of one's sleep;

Fig. 7 is the situation of change of time delay with the length of one's sleep;

Fig. 8 is that efficiency is with the change curve length of one's sleep.

Embodiment

When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, as schemed wherein:

Obviously, the many modifications and variations that those skilled in the art do based on aim of the present invention belong to protection scope of the present invention.

Embodiment 1: as shown in Figure 1, the present embodiment provides a kind of energy-saving system of base station based on data buffer storage, comprises base station configuration module, for the essential information of user in configurating base station; Service source module, for producing the packet of some users according to essential information; Access control module, for determining the quantity of user and carrying out access control to user; Scheduling of resource module, for carrying out scheduling of resource to the packet of user; Result statistical module, for after scheduling of resource, user's successful data reception, carries out result statistics.

In a preferred approach, it is a unit that scheduling of resource module is used for every 100ms, by data buffer storage a period of time, then the data of buffer memory is sent in remaining time.

In a preferred approach, result statistical module is for adding up time delay and the efficiency of user described in each under the different length of one's sleep.

The technique effect of the present embodiment is: effectively save resource and energy during low load, network efficiency is greatly improved when low load, decrease the waste of resource and the energy, when traffic carrying capacity is little, the data after buffer memory a period of time are carried out send the RB resource that can make full use of system.

As shown in Figure 2, the present embodiment provides a kind of base station energy-saving method based on data buffer storage, comprises the steps,

Step 1) essential information of user in configurating base station;

Step 2) packet of some users is produced according to essential information;

Step 3) determine the quantity of user and access control is carried out to user;

Step 4) scheduling of resource is carried out to the packet of user;

Step 5) scheduling of resource, after user's successful data reception, carry out result statistics.

In a preferred approach, step 4) specifically comprise, be a unit with every 100ms, by data buffer storage a period of time, then in remaining time, the data of buffer memory sent.

In a preferred approach, described step 5) specifically comprise, add up time delay and the efficiency of user described in each under the different length of one's sleep.

Benefit of the present invention is: effectively save resource and energy during low load, network efficiency is greatly improved when low load, decrease the waste of resource and the energy, when traffic carrying capacity is little, the data after buffer memory a period of time are carried out send the RB resource that can make full use of system.

Realize degree of depth DTX technology, first will determine the T length of one's sleep_silentwith data transmitting time T_tx, transfer of data has maximum delay, exceedes delay tolerance, and data will be dropped, so rational control T_silentwith transmitting time T_txit is the key that technology is carried out.

Affect T_silentbecause have channel quality, present load amount etc.Just like giving a definition in queueing theory.

It is the time that data on average arrive:

$\stackrel{\‾}{t}=\underset{T\→\∞}{\lim }\frac{1}{n}\mathrm{\Σ}{t}_i$

Average arrival rate:

$\mathrm{\λ}=\frac{1}{\stackrel{\‾}{t}}$Or$\mathrm{\λ}=\underset{T\→\∞}{\lim }\frac{n\left(T\right)}{T}$

Data latency timethe time of service from data reach, wait for that time delay is the major part of data average delay in systems in which.Generally smaller for propagation delay time, processing delay, do not pay attention to here.

The data, services timefrom accept service to service complete time.

The system time of stayingdata are from reaching the time of leaving away

$\stackrel{\‾}{S}+\stackrel{\‾}{w}+\stackrel{\‾}{T_{\mathrm{tx}}}$

First analyze single user, we suppose that the length of one's sleep is Tsilent, and now the time of staying of system becomes:

S＝w+T_tx+T_silent

Require under the condition without prejudice to time delay tolerance limit:

S≤D_delay

That is:

w+T_tx+T_silent≤D_delay

The length of one's sleep is longer, and accumulative data will be more, so T_silentsize to data transmitting time T_txhave a certain impact.We suppose that the data of buffering in the length of one's sleep are at time T_txinterior transmission.

Use P_sizerepresent the mean size of packet, D_bitrepresent the bit number of transmission data, V_maxthe maximum throughput that expression system can provide, relevant with the RB number of channel quality and distribution, T_silentthe data of buffering in time:

$D_{\mathrm{bit}}=\frac{P_{\mathrm{size}}*8*T_{\mathrm{silent}}}{\stackrel{\‾}{t}}$

These data will at time T_txinterior transmission: D_bit=V_max* T_tx

And obtain T_silentwith T_txrelation

$T_{\mathrm{tx}}=\frac{P_{\mathrm{size}}*8*\frac{T_{\mathrm{silent}}}{\stackrel{\‾}{t}}}{V_{\max }}$

And T_silentestimated value:

$T_{\mathrm{silent}}=\frac{D_{\mathrm{delay}}-w}{\frac{P_{\mathrm{size}}*8}{\stackrel{\‾}{t}*V_{\max }}}$

In LTE system, the V that different CQI value is corresponding_max, along with CQI value increases, system can transmit maximum amount of data to be increased thereupon.Show that the average of the length of one's sleep is about 60ms from point of theory.

As shown in Figure 3, send the data of user 1 at first TTI, second TTI sends the data of user 2, and does not have data to send at three TTI, and now PA just turns off at this TTI by we.But the situation that the data volume sent owing to not having data completely or send is less is less, and therefore conventional DTX techniques is only applicable to low loading condition.Here we propose a kind of degree of depth DTX technology, as shown in Figure 4, all have data to send at first three TTI, but in order to utilize frequency domain resource to greatest extent, first by data buffering T_silenttime span, power amplifier dormancy during this period, after dormancy again by data at certain time T_txsend.

As shown in Figure 5, first judge the priority of business according to the time-delay characteristics of different business, the business higher to time delay degrees of tolerance, its priority is lower; The business lower to time delay degrees of tolerance, its priority is higher.High-priority users does not enter sleep pattern, adopts corresponding dispatching algorithm as MaxC/I or RoundRobin, realizes the transmission of data.For low priority user, first data cached T in every 100ms_silenttime, resource scheduling scheme corresponding to degree of depth DTX is then adopted data to be sent within remaining time.In our emulation, employing be single service source-video business, all use adopts degree of depth DTX technology per family.

In LTE system, the V that different CQI value is corresponding_max, as shown in Figure 6, Article 1 curve represents the V under different CQI value_maxvalue, along with CQI value increases, system can transmit maximum amount of data to be increased thereupon.The length of one's sleep of corresponding permission as Fig. 4 Part II, V_maxincrease, the length of one's sleep of permission also can the length of side.And show that the average of the length of one's sleep is about 60ms from point of theory.

As shown in Figure 7, along with the length of one's sleep lengthens, the linear growth of efficiency, as shown in Figure 6, increase with the length of one's sleep, time delay also can increase, time when he falls asleep more than 67ms, time delay can exceed tolerance value, so our delay time is between 60ms-67ms, but between 60ms-67ms, can valid value tend towards stability, in order to meet QoS quality, think deeply from the scheduling of the fixing length of one's sleep, we get 60ms as the best length of one's sleep.Contrast with original DTX power-saving technology, new technology can improve.

Below be only a preferred embodiment of the present invention, described embodiment just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify the protection range also belonging to the claims in the present invention.

Claims (6)

1., based on an energy-saving system of base station for data buffer storage, it is characterized in that comprising,

Base station configuration module, for the essential information of user in configurating base station;

Service source module, for producing the packet of some described users according to described essential information;

Access control module, for determining the quantity of described user and carrying out access control to described user;

Scheduling of resource module, for carrying out scheduling of resource to the packet of described user;

Result statistical module, for after scheduling of resource, described user's successful data reception, carries out result statistics.

2. the energy-saving system of base station based on data buffer storage according to claim 1, is characterized in that,

It is a unit that described scheduling of resource module is used for every 100ms, by data buffer storage a period of time, then the data of buffer memory is sent in remaining time.

3. the energy-saving system of base station based on data buffer storage according to claim 2, is characterized in that,

Described result statistical module is for adding up time delay and the efficiency of user described in each under the different length of one's sleep.

4., based on a base station energy-saving method for data buffer storage, it is characterized in that comprising the steps,

Step 1) essential information of user in configurating base station;

Step 2) packet of some described users is produced according to described essential information;

Step 3) determine the quantity of described user and access control is carried out to described user;

Step 4) scheduling of resource is carried out to the packet of described user;

Step 5) scheduling of resource, after described user's successful data reception, carry out result statistics.

5. the base station energy-saving method based on data buffer storage according to claim 4, is characterized in that,

Described step 4) specifically comprise, be a unit with every 100ms, by data buffer storage a period of time, then in remaining time, the data of buffer memory sent.

6. the base station energy-saving method based on data buffer storage according to claim 5, is characterized in that,

Described step 5) specifically comprise, add up time delay and the efficiency of user described in each under the different length of one's sleep.