CN103596120A - D2D communication method in macro cell and small cell heterogeneous network - Google Patents

D2D communication method in macro cell and small cell heterogeneous network Download PDF

Info

Publication number
CN103596120A
CN103596120A CN201310505248.9A CN201310505248A CN103596120A CN 103596120 A CN103596120 A CN 103596120A CN 201310505248 A CN201310505248 A CN 201310505248A CN 103596120 A CN103596120 A CN 103596120A
Authority
CN
China
Prior art keywords
cellulor
user
macrocellular
under
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201310505248.9A
Other languages
Chinese (zh)
Other versions
CN103596120B (en
Inventor
余官定
鲍鹏程
殷锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN201310505248.9A priority Critical patent/CN103596120B/en
Publication of CN103596120A publication Critical patent/CN103596120A/en
Application granted granted Critical
Publication of CN103596120B publication Critical patent/CN103596120B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a D2D communication method in a macro cell and small cell heterogeneous network. The D2D communication method puts forward five D2D communication modes which are composed of a dedication mode, a macro cell mode, a reused macro cell channel mode, a small cell mode and a reused small cell mode. A D2D user selects the D2D communication modes of highest system energy efficiency for communication. According to the D2D communication method, the small cell mode and the reused small cell mode are added into an existing D2D communication method, the quantity of the modes which can be selected by the D2D user is increased, and the freedom degree of selecting the D2D modes is enhanced. In addition, the working characteristics of the D2D communication method in the macro cell and small cell heterogeneous network are fully utilized, so that the use rate of a frequency spectrum is enhanced. Besides, due to the fact that the D2D user selects the D2D communication modes of the highest system energy efficiency for the communication, frequency spectrum efficiency and energy loss of D2D communication are comprehensively considered, and energy loss is reduced as much as possible while the frequency spectrum efficiency is enhanced.

Description

D2D communication means in macrocellular and cellulor heterogeneous network
Technical field
The present invention relates to the communications field, particularly the D2D communication means in a kind of macrocellular and cellulor heterogeneous network.
Background technology
Along with the fast development of wireless communication system, existing single network system cannot meet the communicating requirement of two-forty, large channel capacity, high quality-of-service, the future development that next generation wireless communication technology is just merging towards plurality of wireless networks isomery.Heterogeneous network refers in the scope covering at macro base station, introduces other communication modes, strengthens targetedly the covering of specific region, forms a kind of network configuration that multilayer covers, and has network networking flexible, and maintenance cost is cheap, thereby has been subject to paying close attention to widely.In single macrocellular network, introducing cellulor is to use at present heterogeneous network comparatively widely, and cellulor is distributed in macrocellular, and each cellulor has independently little base station (small cell base station, SBS).Cellulor refers to that the relative macrocellular of coverage covers less cellular network.The little base station of each cellulor can be disposed by cellular network operator or consumer.By introducing cellulor, can effectively alleviate macrocellular load capacity, improve user communication quality.
Terminal leads directly to (Device-to-Device, D2D) communication is a kind of under the control of system, allow the new technique that carries out direct-connected communication by multiplexing honeycomb channel between terminal, it can increase the spectrum utilization efficiency of cellular system, the load that alleviates cellular base stations, reduction terminal transmit power, elevator system entire throughput, solves to a certain extent the problem of wireless communication system frequency spectrum resource scarcity.
D2D communication pattern is a very important problem in D2D communication, and by selecting suitable communication pattern, the spectrum efficiency of cellular network can be greatly improved.In single network, D2D user's (be D2D communicating pair, comprise D2D transmitting terminal and D2D receiving terminal) can adopt three kinds of patterns to communicate:
(1) macrocellular pattern: the same with traditional cellular communication pattern, the macro base station of usining is realized the communication between D2D user as relaying, and use the macrocellular channel that in Wei Beitong community, other phone users use, this channel, when D2D user does not communicate by letter, can be used by macrocellular user;
(2) dedicated mode: D2D user's direct communication, do not need by base station relaying, using macrocellular is the dedicated channel of its distribution specially, the macrocellular channel that this dedicated channel is not used by other macrocellulars user, and can only be used by D2D user, this channel idle when D2D user does not communicate by letter, can not be used by macrocellular user;
(3) multiplexing macrocellular channelling mode: D2D user's direct communication, does not need by base station relaying.Different from dedicated channel pattern, under multipling channel pattern, D2D user's the channel identical with the common use of the phone user that is re-used.
In macrocellular and cellulor heterogeneous network, channel resource and the single network of honeycomb have a great difference, and cellulor can take part macrocellular channel resource or use new channel resource.Therefore, under heterogeneous network, D2D model selection meeting has a great difference with the model selection under single macrocellular network, and in macrocellular and cellulor heterogeneous network owing to introducing the cellulor of some, carry out channel multiplexing and improved the availability of frequency spectrum, but due to channel multiplexing, the interference of communication system is strengthened, and then cause the energy consumption of whole heterogeneous network to increase, therefore can think to improve the availability of frequency spectrum and reduce energy consumption to have certain contradiction.When improving the availability of frequency spectrum, reduce as much as possible energy consumption, solve the contradiction between the two, a major issue to be solved that to be macrocellular communicate by letter with D2D in cellulor heterogeneous network.And existing document is not considered the D2D model selection problem that macrocellular is communicated by letter with D2D in cellulor heterogeneous network, do not consider to improve the availability of frequency spectrum and reduce energy consumption problem simultaneously.
Summary of the invention
The present invention is directed to the deficiency that existing macrocellular is communicated by letter and existed with D2D in cellulor heterogeneous network, the D2D communication means in a kind of macrocellular and cellulor heterogeneous network is provided, the method can effectively improve the availability of frequency spectrum and reduce energy consumption problem.
D2D communication means in a kind of macrocellular and cellulor heterogeneous network, described macrocellular and cellulor heterogeneous network have 5 kinds of alternative D2D communication patterns, be respectively dedicated mode, macrocellular pattern, multiplexing macrocellular channelling mode, cellulor pattern and multiplexing cellulor channelling mode
Under cellulor pattern, D2D user be take little base station and is communicated as relaying, and uses and disturb minimum cellulor channel,
Under multiplexing cellulor channelling mode, D2D user's direct communication, and the multiplexing channel that D2D receiving terminal is disturbed to minimum cellulor user;
Described D2D communication means comprises:
(1) calculate respectively the system capacity efficiency of 5 kinds of D2D communication systems under D2D communication pattern,
(2) relatively also determine the highest D2D communication pattern of system energy efficiency,
(3) D2D user adopts the definite D2D communication pattern of step (2) to communicate;
Described D2D communication system comprises D2D user, the macrocellular user that is re-used, cellulor user and disturbed cellulor user are re-used;
Described system capacity efficiency is the long-pending ratio of overall channel capacity and total bandwidth and the total transmitting power of all users in D2D communication system.
When the macrocellular user that is re-used is defined as D2D and adopts multiplexing macrocellular pattern and the macrocellular user of D2D user's shared channel, when the cellulor user that is re-used is defined as D2D and adopts multiplexing cellulor pattern and the cellulor user of D2D user's shared channel, when disturbed cellulor user is defined as D2D and adopts cellulor pattern and the cellulor user of D2D user's shared channel.The present invention, under any pattern, the macrocellular user that is re-used, be re-used cellulor user and disturbed cellulor, with existing per family, are regarded as D2D communication system.
D2D communication means of the present invention is with respect to the D2D communication means of existing single Cellular Networks, except existing 3 kinds of D2D communication patterns (comprising dedicated mode, macrocellular pattern and multiplexing macrocellular channelling mode), cellulor pattern and multiplexing cellulor channelling mode are also provided, the feature that takes full advantage of macrocellular and cellulor heterogeneous network, has improved the availability of frequency spectrum.And the present invention has also defined system capacity efficiency, D2D user adopts the most effective D2D communication pattern of system capacity to communicate, consider the availability of frequency spectrum and the energy loss of D2D communication, when system capacity is most effective, the availability of frequency spectrum and energy loss all reach optimum value, make the two mutual balance, efficiently solve the contradiction between the two.
Described macrocellular pattern and the system capacity efficiency of cellulor pattern can be determined according to D2D user present position:
If in the coverage of D2D user in cellulor, the system capacity efficiency that makes macrocellular pattern is 0;
Otherwise the system capacity efficiency that makes cellulor pattern is 0.
Wherein, the signal strength signal intensity receiving according to D2D user judges the whether coverage in same cellulor of D2D user:
If the signal strength signal intensity of the macro base station that D2D user receives is less than the signal strength signal intensity from same little base station, judge that D2D user is in same cellulor coverage;
Otherwise, judge that D2D user is outside cellulor coverage.
D2D user is in same cellulor coverage, the system capacity efficiency that adopts cellulor pattern to communicate in the time of must communicating than employing macrocellular pattern is low, otherwise the system capacity efficiency that adopts macrocellular pattern to communicate in the time of must communicating than employing cellulor pattern is low.D2D communication pattern due to D2D user's selective system energy efficiency maximum, according to D2D user, whether in same cellulor coverage, directly determine that the system capacity efficiency of macrocellular pattern or cellulor pattern is 0, can effectively reduce operand, improve traffic rate.
Described system capacity efficiency is according to formula:
η = C 1 + C 2 + C 3 + C 4 P × W
Calculate, wherein:
C 1the channel capacity that represents D2D user,
C 2represent to be re-used macrocellular user's channel capacity,
C 3the overall channel capacity that represents all cellulor users that are re-used,
C 4the overall channel capacity that represents all disturbed cellulor users,
P is the transmitting power sum of all users in D2D communication system,
W is the channel width sum of all users in D2D communication system.
Channel capacity refers to the maximum rate that channel can provide, and channel capacity is according to Shannon (Shannon) channel capacity formula:
C = W log 2 ( 1 + S I + N )
Calculate, S wherein, I, N be expressed as receiving terminal the signal strength signal intensity receiving,
Disturb and noise power, W is expressed as channel width, S while calculating the channel capacity of different user, and the value of I and N is different.The transmitting power of D2D transmitting terminal under 5 kinds of D2D communication patterns:
(a) dedicated mode:
Figure BDA0000400238310000052
(b) macrocellular pattern:
Figure BDA0000400238310000053
(c) multiplexing macrocellular channelling mode:
Figure BDA0000400238310000054
(d) cellulor pattern: P D = ( N 0 W D + I n 0 ′ ) γ dth H as n 0 ,
(e) multiplexing cellulor channelling mode:
Figure BDA0000400238310000056
Wherein, P dthe transmitting power that represents D2D transmitting terminal, γ dthfor the Signal to Interference plus Noise Ratio thresholding of D2D communication link, N 0for noise power spectral density, H abfor the channel gain between D2D communicating pair, H aBfor the channel gain between D2D transmitting terminal and macro base station,
Figure BDA0000400238310000057
for D2D transmitting terminal and the channel gain between little base station under it, I mRfor the interference of macrocellular user to D2D receiving terminal that be re-used,
Figure BDA0000400238310000058
for the interference of disturbed cellulor user to little base station under D2D user, I sRfor all interference of cellulor user to D2D receiving terminal that are re-used, W dchannel width for D2D transmitting terminal.During due to employing cellulor pattern, D2D communicating pair (comprising transmitting terminal and receiving terminal) must be in same cellulor coverage, and now under D2D user, little base station is exactly the little base station under D2D receiving terminal.
Under different D2D communication patterns, D2D user's channel source is as follows:
Under dedicated mode, macro base station is the macrocellular channel that D2D user assignment is not used by other macrocellulars user arbitrarily, and when D2D user does not adopt dedicated mode communication, this channel keeps idle condition, by macrocellular user, do not used, so this channel is considered to dedicated channel.Under this pattern: W d=W dE, W dEbandwidth for dedicated channel;
Under multiplexing macrocellular channelling mode, the interference on the macrocellular channel that the perception of D2D receiving terminal has been used, selects to disturb minimum macrocellular channel to carry out multiplexing, under this pattern: W d=W mR, W mRbandwidth for the channel that is re-used;
Under macrocellular channelling mode, macro base station is the idle macrocellular channel that D2D distributes other users of any Wei Beizhe community to use, and when D2D user does not adopt dedicated mode communication, this channel can be used by macrocellular user, under this pattern: W d=W m, W mfor macrocellular is distributed to the channel width of D2D transmitting terminal;
Under cellulor channelling mode, the interference under D2D user on little base station perception cellulor channel, disturbs minimum cellulor channel for D2D transmitting terminal distributes, and this channel may also be used under this pattern by cellulor user the free time: W d=W s, W sbandwidth for disturbed cellulor user;
During multiplexing cellulor channelling mode, the interference on the cellulor channel that the perception of D2D receiving terminal has been used, selects to disturb minimum cellulor channel to carry out multiplexing, and this channel is used by cellulor user, under this pattern: W d=W sR, W sRchannel width note for the cellulor user that is re-used.
D2D transmitting power P daccording to the Signal to Interference plus Noise Ratio threshold requirement of receiving terminal, determine, the Signal to Interference plus Noise Ratio that the D2D receiving terminal under any pattern receives equals a certain thresholding γ dth, that is:
SINR = P D H ab I + N 0 = γ dth
D2D user's channel capacity C 1according to shannon formula:
C 1＝W Dlog 2(1+γ dth)
Calculate.
Macrocellular user's channel capacity C is re-used 2according to:
C 2 = W MR log 2 ( 1 + S m I aB + N 0 W MR )
Calculate, wherein:
W mRfor the macrocellular user's that is re-used channel width,
N 0for noise power spectral density,
S mthe signal strength signal intensity from the macrocellular user that is re-used receiving for macro base station,
I aBfor the interference strength of D2D transmitting terminal to macro base station, and under multiplexing macrocellular channelling mode:
I aB＝P DH aB，
Under other patterns, the not multiplexing macrocellular subscriber channel of D2D, so D2D user do not cause any interference to cellular system, meanwhile, D2D does not receive the interference that macrocellular user brings yet, therefore, under all the other D2D communication patterns: I aB=0.
All cellulor users' that are re-used overall channel capacity C 3according to formula:
C 3 = Σ n = 1 N C S n = Σ n = 1 N W SR log 2 ( 1 + S n I as n + I n + N 0 W SR )
Calculate, wherein:
W sRfor the cellulor user's that is re-used channel width,
N is cellulor user's the number of being re-used,
Figure BDA0000400238310000078
for the channel capacity of the cellulor user n that is re-used,
I nfor the interference strength that comes from other cellulor users that are re-used that under the cellulor user n that is re-used, little base station receives,
Figure BDA0000400238310000072
for the channel gain between little base station under D2D transmitting terminal and the cellulor user n that is re-used,
S nfor the signal strength signal intensity from the cellulor user n that is re-used that under the cellulor user n being re-used, little base station receives,
Figure BDA0000400238310000073
for the interference strength of D2D transmitting terminal to little base station under the cellulor user n that is re-used, and during multiplexing cellulor channelling mode:
Figure BDA0000400238310000074
under all the other patterns
Figure BDA0000400238310000075
The present invention considers that the cellulor user in different cellulors may adopt same cellulor channel, therefore the present invention considers that the individual cellulor user in different cellulors of total N adopts the same cellulor channel that is re-used, and has N cellulor user can be subject to D2D user and disturbs.Under other patterns, not multiplexing these cellulor channels of D2D, so these cellulors user is not subject to the multiplexing interference bringing from D2D user, therefore
Figure BDA0000400238310000076
All disturbed cellulor users' overall channel capacity C 4according to formula:
C 4 = Σ r = 1 R C S r = Σ r = 1 R W S log 2 ( 1 + S r I as r + I r + N 0 W S )
Calculate, wherein:
R is disturbed cellulor user's number,
Figure BDA0000400238310000081
for the channel capacity of disturbed cellulor user r,
I rfor the interference that comes from other disturbed cellulor users that under disturbed cellulor user r, little base station receives,
Figure BDA0000400238310000082
for the channel gain between little base station under D2D transmitting terminal and disturbed cellulor user r,
S rfor the signal strength signal intensity from disturbed cellulor user r that under disturbed cellulor user r, little base station receives,
Figure BDA0000400238310000083
for the interference strength of D2D transmitting terminal to little base station under the cellulor user r that is re-used, and under multiplexing cellulor channelling mode:
I aS r = P D H aS r ,
Under all the other D2D communication patterns:
Figure BDA0000400238310000085
Described in above, the present invention considers that the cellulor user in different cellulors may adopt same cellulor channel, therefore the present invention considers that the individual cellulor user in different districts of total R adopts same cellulor channel, has R cellulor user can be subject to D2D user and disturbs.Under other patterns, D2D is not used these cellulor channels, so these cellulors user is not subject to the interference bringing from D2D, therefore
In described D2D communication system, all users' channel width sum is:
Under dedicated mode: W=W dE+ W mR+ W sR+ W s,
Under macrocellular pattern: W=2W m+ W mR+ W sR+ W s,
Under other D2D communication patterns: W=W mR+ W sR+ W s.
Wherein, W dEfor macrocellular is distributed to the bandwidth of D2D user's dedicated channel, W mfor little macrocellular is distributed to the channel width of D2D transmitting terminal.While calculating channel width sum, the not double counting of bandwidth of identical channel.Under dedicated mode and macrocellular pattern, system need to be the other allocated channel of D2D user, and under other patterns, system does not need for the other allocated channel of transfer for D2D.Under macrocellular pattern, because D2D communication process be take little base station as relaying, therefore now D2D receiving terminal also needs channel, and its channel width is also W mso now D2D user's bandwidth is 2W m.
D2D communication means in macrocellular of the present invention and cellulor heterogeneous network is with respect to the D2D communication means of existing single Cellular Networks, 5 kinds of D2D communication patterns have been proposed: comprise dedicated mode, macrocellular pattern and multiplexing macrocellular channelling mode, cellulor pattern and multiplexing cellulor channelling mode, enriched the pattern quantity that D2D user can select, increased the degree of freedom of D2D model selection, the feature that the cellulor pattern of introducing and multiplexing cellulor channelling mode take full advantage of macrocellular and cellulor heterogeneous network, the availability of frequency spectrum that improved frequency spectrum.And defined system capacity efficiency, D2D user adopts the most effective D2D communication pattern of system capacity to communicate, consider the availability of frequency spectrum and the energy loss of D2D communication, when improving the availability of frequency spectrum, reduce as much as possible energy consumption.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of 5 kinds of D2D communication patterns of the present invention;
Fig. 2 is the flow chart of the D2D communication means in macrocellular of the present invention and cellulor heterogeneous network;
Fig. 3 is the calculation process of the system capacity efficiency of D2D communication system under 5 kinds of D2D communication patterns;
Fig. 4 is the functional relation of distance between the tired and D2D communicating pair of average system energy efficiency in the present embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
In the present embodiment:
Definition is the user for use same channel with frequency user;
Definition is re-used macrocellular user for D2D adopts during multiplexing macrocellular channelling mode and the macrocellular user of the shared same channel of D2D;
Definition is re-used cellulor user for D2D adopts during multiplexing cellulor channelling mode and the cellulor user of the shared same channel of D2D;
When defining disturbed cellulor user and adopting cellulor channelling mode for D2D with the cellulor user of the shared same channel of D2D transmitting terminal;
The communicating pair of definition D2D user for carrying out direct-connected communication, comprises transmitting terminal a and receiving terminal b;
Define system energy efficiency is total transmitting power of all users and the long-pending ratio of shared bandwidth in the overall channel capacity of the system (being D2D communication system) that forms of D2D user, disturbed macrocellular and the cellulor user that is re-used and this system, and unit is bps/mW/Hz;
Definition signal intensity and interference strength are respectively the useful signal that receives and the power of interference.
The application scenarios of the D2D communication means in the present embodiment macrocellular and cellulor heterogeneous network is as follows:
Macrocellular covering radius R mB=1000m, cellulor covering radius is R sB=100m, between D2D user, distance is 50～250m; In a macrocellular, be deployed with 6 macrocellular users, 2 nonoverlapping cellulors of coverage have same allocatable channel resource, and each cellulor respectively has 2 cellulor users, the quantity of the cellulor that is re-used; User in same cellulor uses different channels, be between the user in same cellulor, not have interference, user in different cellulors can use identical channel, and exist and disturb between the different cellulor users of use same channel, there is the idle cellulor channel not being used, be that D2D user does not disturb other cellulors user while adopting cellulor pattern, so R=0; 1 couple of D2D user need to carry out model selection; D2D user SINR thresholding γ dthbe 15dB, all users (comprising transmitting terminal a, receiving terminal b, macrocellular user and cellulor user) bandwidth is 1MHz; Noise power spectral density N 0for-174dBm/Hz; The path loss of cellular communication link is 128.1+37.6log10 (d), and unit is dB, and wherein d represents the distance between communicating pair, and unit is km, and the average of shadow fading is 0, variance is 10dB.
The macrocellular of the present embodiment can select a kind of D2D of carrying out to communicate by letter with D2D user in D2D communication means in cellulor heterogeneous network in 5 kinds of alternative D2D communication patterns.As shown in Figure 1, be respectively 5 kinds of alternative D2D communication patterns: the schematic diagram of macrocellular pattern, cellulor pattern, multiplexing macrocellular channelling mode, multiplexing cellulor channelling mode and dedicated mode, specific as follows:
Macrocellular pattern: the same with traditional cellular communication pattern, using macro base station as the communication that continues to realize between D2D user, and use the macrocellular channel that in Wei Beitong community, other phone users use, this channel, when D2D user does not communicate by letter, can be used by macrocellular user;
Dedicated mode: two users' direct communication, do not need by base station relaying, use the macrocellular channel that in Wei Beitong community, other phone users use, and this channel can only be used by D2D user, this channel idle when D2D user does not communicate by letter, can not be used by macrocellular user;
Multiplexing macrocellular channelling mode: two users' direct communication.Different from dedicated channel pattern, under multipling channel pattern, the channel that D2D user is identical with the common use of the phone user that is re-used;
Cellulor pattern: D2D user be take little base station and communicated as relaying, and uses the idle channel not used by cellulor user;
Multiplexing macrocellular channelling mode: D2D user's direct communication, and the multiplexing channel that D2D receiving terminal is disturbed to minimum cellulor user.
The workflow of the D2D communication means in the macrocellular of the present embodiment and cellulor heterogeneous network, as shown in 2, comprises the following steps:
(1) calculate respectively the system capacity efficiency of 5 kinds of D2D communication systems under D2D communication pattern;
(2) relatively also determine the highest D2D communication pattern of system energy efficiency;
(3) D2D user adopts the definite D2D communication pattern of step (2) to communicate.
In step (1), according to following methods, calculate the system capacity efficiency of the D2D communication system under 5 kinds of D2D communication patterns, as shown in Figure 3, comprising:
S101, obtain that D2D communicating pair (being D2D user: transmitting terminal a and receiving terminal b) receives respectively from macro base station signal strength signal intensity with from the maximum signal of all little base stations,
S102, the signal strength signal intensity size of obtaining according to step S101 judge that D2D communicating pair is whether in same cellulor coverage:
If the signal strength signal intensity from macro base station that transmitting terminal a and receiving terminal b receive is less than the signal strength signal intensity from same little base station, judge that transmitting terminal a and receiving terminal b are in same cellulor coverage, the system capacity efficiency that makes the D2D communication system under macrocellular pattern is 0;
Otherwise, judge that transmitting terminal a and receiving terminal b are outside cellulor coverage, the system capacity efficiency that makes the D2D communication system under cellulor pattern is 0.
In the present embodiment, result of determination is: transmitting terminal a and receiving terminal b are in same cellulor coverage, corresponding to little base station n 0, the system capacity efficiency of the D2D communication system under macrocellular pattern is 0.
S103, obtain that to calculate be the required parameter of energy efficiency
(a) obtain D2D communicating pair, i.e. channel gain H between transmitting terminal a and receiving terminal b ab, transmitting terminal a is to the channel gain H between macro base station aB, and transmitting terminal a and little base station n under it 0between channel gain
Figure BDA0000400238310000121
(b) determine be re-used macrocellular user and relevant parameter
The interference from all macrocellular users perceiving according to D2D receiving terminal, selects the minimum phone user's channel of multiplexing interference, and bandwidth is W mR, this interference power intensity is designated as I mR;
(c) determine be re-used cellulor user and relevant parameter
(c1) interference from cellulor user on the cellulor channel that receiving terminal b perception has been used by cellulor user, selects to disturb minimum channel to carry out multiplexing, and the interference on this channel is designated as to I sR,
(c2) by using, disturb minimum channel cellulor user to be defined as the cellulor user that is re-used, and obtain:
Channel gain under transmitting terminal a and each cellulor user that is re-used between little base station, is designated as
Figure BDA0000400238310000123
, the n cellulor Customs Assigned Number that represents to be re-used wherein, n=1 ... N, the N cellulor total number of users that represents to be re-used, N=2 in this enforcement,
And interference and signal strength signal intensity that under each cellulor user that is re-used, little base station receives on selected channel, be designated as respectively I n, S n, n=1 ... N;
(d) determine disturbed user and relevant parameter
According to little base station n under D2D receiving terminal 0the cellulor user's from other little base stations who perceives interference, selects to disturb minimum cellulor user channel allocations to D2D transmitting terminal, and bandwidth is W s, this least interference power level is designated as
Figure BDA0000400238310000124
, use the cellulor user of this channel to be disturbed cellulor user.
S104, the parameter of obtaining according to step S103 are calculated respectively the transmitting power of D2D transmitting terminal under 5 kinds of D2D communication patterns:
(a) dedicated mode:
Figure BDA0000400238310000131
(b) macrocellular pattern:
Figure BDA0000400238310000132
(c) multiplexing macrocellular channelling mode:
Figure BDA0000400238310000133
(d) cellulor pattern: P D = ( N 0 W D + I n 0 ′ ) γ dth H as n 0 ,
(e) multiplexing cellulor channelling mode:
Figure BDA0000400238310000135
S105, according to formula:
η = C 1 + C 2 + C 3 + C 4 P × W
Calculate, wherein:
C 1the channel capacity that represents D2D user, according to formula:
C 1＝W Dlog 2(1+γ dth)
Calculate,
C 2represent to be re-used macrocellular user's channel capacity, according to formula:
C 2 = W MR log 2 ( 1 + S m I aB + N 0 W MR )
Calculate, wherein, I aBfor the interference strength of D2D transmitting terminal to macro base station, and under multiplexing macrocellular channelling mode: I aB=P dh aB, under all the other patterns: I aB=0;
C 3the overall channel capacity that represents all cellulor users that are re-used, according to formula:
C 3 = Σ n = 1 N C S n = Σ n = 1 N W SR log 2 ( 1 + S n I as n + I n + N 0 W SR )
Calculate,
Figure BDA0000400238310000139
for the interference strength of D2D transmitting terminal to little base station under the cellulor user n that is re-used, and during multiplexing cellulor channelling mode:
Figure BDA00004002383100001310
under all the other patterns
Figure BDA00004002383100001311
C 4the overall channel capacity that represents all disturbed cellulor users, according to formula:
C 4 = Σ r = 1 R C S r = Σ r = 1 R W S log 2 ( 1 + S r I as r + I r + N 0 W S )
Calculate, wherein:
for the interference strength of D2D transmitting terminal to little base station under the cellulor user r that is re-used, and during multiplexing cellulor channelling mode:
Figure BDA0000400238310000142
under all the other patterns r is disturbed cellulor user's number, R=0 in the present embodiment;
P is be re-used macrocellular user, the cellulor user that is re-used, disturbed cellulor user and D2D user's transmitting power sum, and the macrocellular user's that is wherein re-used power is fed back to macro base station by base station under above-mentioned user by macrocellular obtain, be re-used cellulor user, disturbed cellulor user's power;
W is the channel width sum of all users in D2D communication system, under different D2D communication patterns, is expressed as:
Under dedicated mode: W=W dE+ W mR+ W sR+ W s,
Under macrocellular pattern: W=2W m+ W mR+ W sR+ W s,
Under other D2D communication patterns: W=W mR+ W sR+ W s,
Wherein, W dEfor macrocellular is distributed to the bandwidth of the dedicated channel of D2D transmitting terminal, W mfor little macrocellular is distributed to D2D user's channel width.
In the present embodiment: W dE=1MHZ, W mR=1MHZ, W sR=1MHZ, W s=1MHZ, W m=1MHZ.
Average system energy efficiency is expressed as the mean value of every 10000 analogue system energy efficiency samples.Because cellulor pattern requires D2D communicating pair in same cellulor coverage, be not that all D2D communication can adopt single cellulor pattern, therefore single cellulor pattern does not possess comparativity.Fig. 3 is the functional relation that in 10000 emulation, all D2D users adopt distance between average system energy efficiency under different single-modes (being respectively macrocellular pattern, multiplexing macrocellular channelling mode, cellulor pattern and multiplexing cellulor channelling mode) communication and institute of the present invention extracting method communication and D2D communicating pair.Can find out, the mode selecting method providing is compared single-mode can provide larger energy efficiency.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.

Claims (10)

1. the D2D communication means in a macrocellular and cellulor heterogeneous network, it is characterized in that, described macrocellular and cellulor heterogeneous network have 5 kinds of alternative D2D communication patterns, be respectively dedicated mode, macrocellular pattern, multiplexing macrocellular channelling mode, cellulor pattern and multiplexing cellulor channelling mode
Under cellulor pattern, D2D user be take little base station and is communicated as relaying, and uses and disturb minimum cellulor channel,
Under multiplexing cellulor channelling mode, D2D user's direct communication, and the multiplexing channel that D2D receiving terminal is disturbed to minimum cellulor user;
Described D2D communication means comprises:
(1) calculate respectively the system capacity efficiency of 5 kinds of D2D communication systems under D2D communication pattern,
(2) relatively also determine the highest D2D communication pattern of system energy efficiency,
(3) D2D user adopts the definite D2D communication pattern of step (2) to communicate;
Described D2D communication system comprises D2D user, the macrocellular user that is re-used, cellulor user and disturbed cellulor user are re-used;
Described system capacity efficiency is the long-pending ratio of overall channel capacity and total bandwidth and the total transmitting power of all users in D2D communication system.
2. the D2D mode selecting method in macrocellular as claimed in claim 1 and cellulor heterogeneous network, is characterized in that, described macrocellular pattern and the system capacity efficiency of cellulor pattern are determined according to D2D user present position:
If in the coverage of D2D user in same cellulor, the system capacity efficiency that makes macrocellular pattern is 0;
Otherwise the system capacity efficiency that makes cellulor pattern is 0.
3. the D2D mode selecting method in macrocellular as claimed in claim 2 and cellulor heterogeneous network, is characterized in that, the signal strength signal intensity receiving according to D2D user judges the whether coverage in same cellulor of D2D user:
If the signal strength signal intensity of the macro base station that D2D user receives is less than the signal strength signal intensity from same little base station, judge that D2D user is in same cellulor coverage;
Otherwise, judge that D2D user is outside cellulor coverage.
4. the D2D mode selecting method in macrocellular as claimed in claim 3 and cellulor heterogeneous network, is characterized in that, described system capacity efficiency is according to formula:
η = C 1 + C 2 + C 3 + C 4 P × W
Calculate, wherein:
C 1the channel capacity that represents D2D user,
C 2represent to be re-used macrocellular user's channel capacity,
C 3the overall channel capacity that represents all cellulor users that are re-used,
C 4the overall channel capacity that represents all disturbed cellulor users,
P is the transmitting power sum of all users in D2D communication system,
W is the channel width sum of all users in D2D communication system.
5. the D2D mode selecting method in macrocellular as claimed in claim 4 and cellulor heterogeneous network, is characterized in that, the transmitting power of D2D transmitting terminal under 5 kinds of D2D communication patterns:
(a) dedicated mode:
Figure FDA0000400238300000022
(b) macrocellular pattern:
(c) multiplexing macrocellular channelling mode:
Figure FDA0000400238300000024
(d) cellulor pattern: P D = ( N 0 W D + I n 0 ′ ) γ dth H as n 0 ,
(e) multiplexing cellulor channelling mode:
Figure FDA0000400238300000026
Wherein, P dthe transmitting power that represents D2D transmitting terminal, γ dthfor the Signal to Interference plus Noise Ratio thresholding of D2D communication link, N 0for noise power spectral density, H abfor the channel gain between D2D user, H aBfor the channel gain between D2D transmitting terminal and macro base station,
Figure FDA0000400238300000027
for D2D transmitting terminal and the channel gain between little base station under it, I mRfor the interference of macrocellular user to D2D receiving terminal that be re-used, for the interference of disturbed cellulor user to little base station under D2D user, I sRfor all interference of cellulor user to D2D receiving terminal that are re-used, W dchannel width for D2D transmitting terminal.
6. the D2D mode selecting method in macrocellular as claimed in claim 5 and cellulor heterogeneous network, is characterized in that, D2D user's channel capacity is according to formula:
C 1＝W Dlog 2(1+γ dth)
Calculate.
7. the D2D mode selecting method in macrocellular as claimed in claim 6 and cellulor heterogeneous network, is characterized in that, the macrocellular user's that is re-used channel capacity C 2according to:
C 2 = W MR log 2 ( 1 + S m I aB + N 0 W MR )
Calculate, wherein:
W mRfor the macrocellular user's that is re-used channel width,
N 0for noise power spectral density,
S mthe signal strength signal intensity from the macrocellular user that is re-used receiving for macro base station,
I aBfor the interference strength of D2D transmitting terminal to macro base station, and under multiplexing macrocellular channelling mode:
I aB＝P DH aB，
Under all the other D2D communication patterns: I aB=0.
8. the D2D mode selecting method in macrocellular as claimed in claim 7 and cellulor heterogeneous network, is characterized in that, all cellulor users' that are re-used overall channel capacity is according to formula:
C 3 = Σ n = 1 N C S n = Σ n = 1 N W SR log 2 ( 1 + S n I as n + I n + N 0 W SR )
Calculate, wherein:
W sRfor the cellulor user's that is re-used channel width,
N is cellulor user's the number of being re-used,
Figure FDA0000400238300000034
for the channel capacity of the cellulor user n that is re-used,
I nfor the interference strength that comes from other cellulor users that are re-used that under the cellulor user n that is re-used, little base station receives,
Figure FDA0000400238300000041
for the channel gain between little base station under D2D transmitting terminal and the cellulor user n that is re-used,
S nfor the signal strength signal intensity from the cellulor user n that is re-used that under the cellulor user n being re-used, little base station receives,
Figure FDA0000400238300000042
for the interference strength of D2D transmitting terminal to little base station under the cellulor user n that is re-used, and under multiplexing cellulor channelling mode:
I aS n = P D H aS n ,
Under all the other D2D communication patterns:
Figure FDA00004002383000000410
9. the D2D mode selecting method in macrocellular as claimed in claim 8 and cellulor heterogeneous network, is characterized in that, all disturbed cellulor users' overall channel capacity is according to formula:
C 4 = Σ r = 1 R C S r = Σ r = 1 R W S log 2 ( 1 + S r I as r + I r + N 0 W s )
Calculate, wherein:
W sfor disturbed cellulor user's channel width,
R is disturbed cellulor user's number,
Figure FDA0000400238300000045
for the channel capacity of disturbed cellulor user r,
I rfor the interference that comes from other disturbed cellulor users that under disturbed cellulor user r, little base station receives,
Figure FDA0000400238300000046
for the channel gain between little base station under D2D transmitting terminal and disturbed cellulor user r,
S rfor the signal strength signal intensity from disturbed cellulor user r that under disturbed cellulor user r, little base station receives,
Figure FDA0000400238300000047
for the interference strength of D2D transmitting terminal to little base station under the cellulor user r that is re-used, and under multiplexing cellulor channelling mode:
I aS r = P D H aS r ,
Under all the other D2D communication patterns:
Figure FDA0000400238300000049
10. the D2D mode selecting method in macrocellular as claimed in claim 9 and cellulor heterogeneous network, is characterized in that, in described D2D communication system, all users' channel width sum is:
Under dedicated mode: W=W dE+ W mR+ W sR+ W s,
Under macrocellular pattern: W=2W m+ W mR+ W sR+ W s,
Under other D2D communication patterns: W=W mR+ W sR+ W s,
Wherein, W dEfor the bandwidth of D2D user's dedicated channel, W mfor macrocellular is distributed to the channel width of D2D transmitting terminal.
CN201310505248.9A 2013-10-23 2013-10-23 D2D communication method in macro cell and small cell heterogeneous network Active CN103596120B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310505248.9A CN103596120B (en) 2013-10-23 2013-10-23 D2D communication method in macro cell and small cell heterogeneous network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310505248.9A CN103596120B (en) 2013-10-23 2013-10-23 D2D communication method in macro cell and small cell heterogeneous network

Publications (2)

Publication Number Publication Date
CN103596120A true CN103596120A (en) 2014-02-19
CN103596120B CN103596120B (en) 2017-01-25

Family

ID=50086070

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310505248.9A Active CN103596120B (en) 2013-10-23 2013-10-23 D2D communication method in macro cell and small cell heterogeneous network

Country Status (1)

Country Link
CN (1) CN103596120B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103973344A (en) * 2014-04-29 2014-08-06 东南大学 Base station antenna selection method for D2D communication
CN105122897A (en) * 2014-03-26 2015-12-02 华为技术有限公司 Method for device-to-device (D2D) network mode selection and terminal
CN105792310A (en) * 2016-03-04 2016-07-20 哈尔滨工业大学深圳研究生院 Relay selection algorithm based on LTE Internet of vehicles
WO2016134609A1 (en) * 2015-02-26 2016-09-01 中兴通讯股份有限公司 Method and apparatus for acquiring management policy of heterogeneous network
CN106664663A (en) * 2014-07-28 2017-05-10 宇龙计算机通信科技(深圳)有限公司 Power control method and device, parameter transmission method and device, and base station and terminal
CN106792893A (en) * 2016-11-29 2017-05-31 西南交通大学 Isomery cellular network cut-in method based on maximal received power
CN107371169A (en) * 2017-08-01 2017-11-21 南京航空航天大学 Model selection based on evolutionary Game and frequency spectrum distribution mechanism in isomery full duplex D2D cellular networks
WO2017219303A1 (en) * 2016-06-23 2017-12-28 Nokia Technologies Oy Apparatus, method and computer program product for relay selection in a wireless network
CN108848562A (en) * 2018-05-24 2018-11-20 重庆邮电大学 Based on the resource allocation methods of one-to-many matching in heterogeneous network
CN109587827A (en) * 2019-01-18 2019-04-05 哈尔滨工业大学 The multipair D2D communication means of multimode and system
CN111641998A (en) * 2014-03-14 2020-09-08 北京三星通信技术研究有限公司 Method for supporting UE access control

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244873A (en) * 2011-08-26 2011-11-16 北京邮电大学 Method for selecting resource multiplexing modes for D2D (Device-to-Device) user pair and cellular user based on position of D2D user pair
CN103079262A (en) * 2012-12-28 2013-05-01 浙江大学 Mode selection and resource allocation method of device-to-device (D2D) users in cellular system
WO2013098461A1 (en) * 2011-12-29 2013-07-04 Nokia Siemens Networks Oy Operating broadband public safety mobile communication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244873A (en) * 2011-08-26 2011-11-16 北京邮电大学 Method for selecting resource multiplexing modes for D2D (Device-to-Device) user pair and cellular user based on position of D2D user pair
WO2013098461A1 (en) * 2011-12-29 2013-07-04 Nokia Siemens Networks Oy Operating broadband public safety mobile communication
CN103079262A (en) * 2012-12-28 2013-05-01 浙江大学 Mode selection and resource allocation method of device-to-device (D2D) users in cellular system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
聂高峰: "一种复用蜂窝网络下行无线资源的D2D通信干扰抑制方法", 《电信网技术》 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111641998B (en) * 2014-03-14 2022-09-27 北京三星通信技术研究有限公司 Method for supporting UE access control
CN111641998A (en) * 2014-03-14 2020-09-08 北京三星通信技术研究有限公司 Method for supporting UE access control
CN105122897A (en) * 2014-03-26 2015-12-02 华为技术有限公司 Method for device-to-device (D2D) network mode selection and terminal
CN103973344B (en) * 2014-04-29 2017-05-24 东南大学 Base station antenna selection method for D2D communication
CN103973344A (en) * 2014-04-29 2014-08-06 东南大学 Base station antenna selection method for D2D communication
CN106664663A (en) * 2014-07-28 2017-05-10 宇龙计算机通信科技(深圳)有限公司 Power control method and device, parameter transmission method and device, and base station and terminal
CN106664663B (en) * 2014-07-28 2020-11-10 宇龙计算机通信科技(深圳)有限公司 Power control method and device, parameter transmission method and device, base station and terminal
WO2016134609A1 (en) * 2015-02-26 2016-09-01 中兴通讯股份有限公司 Method and apparatus for acquiring management policy of heterogeneous network
CN105792310B (en) * 2016-03-04 2019-12-06 哈尔滨工业大学深圳研究生院 Relay selection method based on LTE Internet of vehicles
CN105792310A (en) * 2016-03-04 2016-07-20 哈尔滨工业大学深圳研究生院 Relay selection algorithm based on LTE Internet of vehicles
WO2017219303A1 (en) * 2016-06-23 2017-12-28 Nokia Technologies Oy Apparatus, method and computer program product for relay selection in a wireless network
CN106792893A (en) * 2016-11-29 2017-05-31 西南交通大学 Isomery cellular network cut-in method based on maximal received power
CN107371169A (en) * 2017-08-01 2017-11-21 南京航空航天大学 Model selection based on evolutionary Game and frequency spectrum distribution mechanism in isomery full duplex D2D cellular networks
CN108848562A (en) * 2018-05-24 2018-11-20 重庆邮电大学 Based on the resource allocation methods of one-to-many matching in heterogeneous network
CN108848562B (en) * 2018-05-24 2022-05-31 重庆邮电大学 Resource allocation method based on one-to-many matching in heterogeneous network
CN109587827A (en) * 2019-01-18 2019-04-05 哈尔滨工业大学 The multipair D2D communication means of multimode and system
CN109587827B (en) * 2019-01-18 2021-08-03 哈尔滨工业大学 Multimode multi-pair D2D communication method and system

Also Published As

Publication number Publication date
CN103596120B (en) 2017-01-25

Similar Documents

Publication Publication Date Title
CN103596120B (en) D2D communication method in macro cell and small cell heterogeneous network
CN103997740B (en) Cognitive-Cooperation network association resource allocation methods based on optimization utility
CN104717755A (en) Downlink frequency spectrum resource distribution method with D2D technology introduced in cellular network
Liu et al. Transmission capacity of D2D communication under heterogeneous networks with dual bands
CN107613555A (en) Non-orthogonal multiple accesses honeycomb and terminal direct connection dense network resource management-control method
Cho et al. Spectrum allocation and mode selection for overlay D2D using carrier sensing threshold
Liu et al. Energy-efficient resource allocation in full-duplex relaying networks
CN102036385B (en) Method for scheduling resources among cells, base stations, user equipment and mobile communication system
CN103369542A (en) Game theory-based common-frequency heterogeneous network power distribution method
CN103987110A (en) Interference management mechanism based on partial frequency reuse and power control
CN103369568B (en) Based on game theoretic radio resource optimizing method in LTE-A relay system
CN102098679B (en) Method for reducing long term evolution (LTE) radio communication system cell interference by using cognitive technology
CN104918257A (en) D2D communication resource allocation method in relay cooperative heterogeneous cellular network
CN106792893A (en) Isomery cellular network cut-in method based on maximal received power
CN102378261B (en) Method and device for coordinating downlink interference of long term evolution system
Lee et al. Device-to-device communication in wireless mobile social networks
Xu et al. Resource management for interference mitigation in device‐to‐device communication
CN101917768A (en) User fairness resource allocation method for orthogonal frequency division multiple access relay system
CN108200581A (en) Multi-user resource distributing method in the wireless power communication network of selective user cooperation
CN102811490A (en) MISO-OFDM (Multiple-Input Single-Output-Orthogonal Frequency Division Multiplexing) downlink resource distribution method based on energy efficiency
CN103237309B (en) For the Quasi dynamic frequency resource division methods of LTE-A relay system interference coordination
CN103139800A (en) Node adjustment method, device and system of relay cellular network
CN103281695B (en) A kind of hop relay network frequency spectrum planing method
Al-Wesabi et al. A joint algorithm for resource allocation in d2d 5g wireless networks
CN102256366B (en) Multi-user multiple input multiple output (MIMO) resource scheduling method under carrier aggregation scene

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant