CN107343257B - The method and device of resource allocation - Google Patents
The method and device of resource allocation Download PDFInfo
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- CN107343257B CN107343257B CN201710405842.9A CN201710405842A CN107343257B CN 107343257 B CN107343257 B CN 107343257B CN 201710405842 A CN201710405842 A CN 201710405842A CN 107343257 B CN107343257 B CN 107343257B
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- channel gain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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Abstract
The embodiment of the invention provides the methods of resource allocation, comprising: obtains straight-through D2D pairs of first terminal, the first D2D is to being D2D couples maximum to channel gain in set of candidate D2D, and the candidate D2D is to D2D pairs including at least one resource to be allocated in set；The first frequency spectrum is obtained, first frequency spectrum is any one in current reusable frequency spectrum, for preparing D2D pairs of access the described first；When the described first D2D pairs meet the minimal communications quality of each user in first frequency spectrum between first frequency spectrum when, by the first D2D to accessing in first frequency spectrum.In guaranteeing the first frequency spectrum on the basis of QoS of customer, building is to maximize D2D logarithm that grid can access simultaneously as the Optimized model of target.By analyzing the channel conditions of cellular link and D2D link, the best multiplexing set before phone user and D2D user is found, D2D access rate and power system capacity are improved.
Description
Technical field
The present invention relates to mobile communication technology fields, more particularly to a kind of method and device of resource allocation.
Background technique
Allowing user to carry out D2D (Device-to-Device, terminal direct connection) technology of terminal direct connection is considered as solving
One of effective ways of the above problem.It allows adjacent UE (User Equipment, user) not transmit number directly by BS
According to network load being transferred to the side UE from the side BS, using the characteristic of channel good between UE, system can be significantly improved
Spectrum efficiency and energy efficiency, thus obtain significant progress, it is considered to be one of the key technology in 5G mobile network.Its
Advantage is that closer distance communication ensure that better channel quality holds corresponding to better channel between two communication users
Amount and lower power loss.Also, since direct communication ensure that lower transmission delay between user.Moreover, by multiple
With the frequency spectrum resource of conventional cellular network user, the D2D link that the spectrum efficiency of wireless network can be activated, which is stablized, to be promoted.
However, the D2D link of activation can generate interference to traditional phone user.Therefore, in order to obtain better system
Performance guarantees the communication quality of phone user, reasonable interference management techniques (model selection, resource allocation, power control) simultaneously
It is essential.
Currently, the resource allocation methods in existing D2D enabled cellular network, usually single phone user and single
The system model of D2D user, the case of this single D2D user are simultaneously unsatisfactory for real life scene.There are also some resource allocations
Method is to carry out one-to-one resource multiplex with D2D user under the premise of meeting cellular subscriber communications quality, and this method has
Two disadvantages: first, the communication quality for only meeting phone user not can guarantee while D2D communication quality；Second, only carrying out a pair of
The resource that one resource multiplex may cause phone user cannot make full use of.
Summary of the invention
In view of the above problems, it proposes the embodiment of the present invention and overcomes the above problem or at least partly in order to provide one kind
The method and device of the resource allocation to solve the above problems.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of methods of resource allocation, comprising: obtains first eventually
Straight-through D2D pairs of end, the first D2D is to for D2D couples maximum to channel gain in set of candidate D2D, and the candidate D2D is to collection
It include D2D pairs of at least one resource to be allocated in conjunction；The first frequency spectrum is obtained, first frequency spectrum is current reusable frequency spectrum
In any one, for preparing access the described first D2D pairs；When the described first D2D pairs meet between first frequency spectrum
In first frequency spectrum when minimal communications quality of each user, by the first D2D in access first frequency spectrum.
Further, it is described when the described first D2D pairs meet in first frequency spectrum first frequency spectrum between each
When the minimal communications quality of user, by the first D2D in access first frequency spectrum, comprising:
Obtain the first signal-to-noise ratio and the second signal-to-noise ratio, first signal-to-noise ratio is the described first D2D pairs of signal-to-noise ratio, institute
State the signal-to-noise ratio that the second signal-to-noise ratio is the phone user CUE in first frequency spectrum；Obtain first distance and second distance, institute
Stating first distance is the distance between the first D2D centering transmitting terminal and base station, and the second distance is the described first D2D pairs
Middle receiving end and the CUE or accessed the D2D of the first frequency spectrum to the distance between；According to first signal-to-noise ratio, described
Two signal-to-noise ratio, the first distance and the second distance, in conjunction with the user type and number accessed in current first frequency spectrum,
Judge the first D2D to whether meeting the minimal communications quality of each user in the first frequency spectrum；It is every in the first frequency spectrum when meeting
When the minimal communications quality of a user, by the first D2D in access first frequency spectrum.
Further, described according to first signal-to-noise ratio, second signal-to-noise ratio, the first distance and described
Two distances judge the first D2D to whether meeting the first frequency in conjunction with the user type and number accessed in current first frequency spectrum
The minimal communications quality of each user in spectrum, comprising:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；Judge whether the first distance is greater than third distance, the second distance whether be greater than third away from
It is the first D2D to the protection zone radius of, base station from, third distance；
When in first frequency spectrum there is only when CUE, judge the first channel gain whether be greater than the minimum signal-to-noise ratio of CUE with
The product of second channel gain, first channel gain increase divided by whether the minimum signal-to-noise ratio of CUE is less than or equal to third channel
Minimum signal-to-noise ratio of the benefit divided by DUE, channel gain of first channel gain between CUE and base station, the second channel
Channel gain of the gain between the first D2D centering transmitting terminal and base station, the third channel gain are the first D2D centering transmitting
Channel gain between end and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 4th channel gain, described first
Whether channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and described first
Channel gain of the channel gain between CUE and base station, the third channel gain are the first D2D centering transmitting terminal and receiving end
Between channel gain, channel gain of the 4th channel gain between CUE and the first D2D centering receiving end；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the 4th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum noise of CUE
Than, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first channel gain
The product of minimum signal-to-noise ratio and second channel gain greater than DUE, first channel gain are big divided by the minimum signal-to-noise ratio of CUE
It is greater than the minimum signal-to-noise ratio and the 4th channel of DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE in third channel gain
The product of gain, first channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of CUE to be believed divided by the minimum of DUE
Make an uproar ratio, and the product between thermal noise and the third channel gain be greater than for transmission power, first channel gain with
And the product of the second channel gain, and the product between thermal noise and the third channel gain is greater than for emitting function
When the product of rate, first channel gain and the 4th channel gain, judgement obtain it is described to the first D2D to meeting the
The minimal communications quality of each user in one frequency spectrum.
Further, described according to first signal-to-noise ratio, second signal-to-noise ratio, the first distance and described
Two distances judge the first D2D to whether meeting the first frequency in conjunction with the user type and number accessed in current first frequency spectrum
The minimal communications quality of each user in spectrum, comprising:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；Judge whether the first distance is greater than third distance, the second distance whether be greater than third away from
It is the first D2D to the protection zone radius of, base station from, third distance；
When existing simultaneously CUE and DUE in first frequency spectrum, judge whether the first channel gain is greater than the minimum of CUE
Whether the product of signal-to-noise ratio and second channel gain, first channel gain are less than or equal to divided by the minimum signal-to-noise ratio of CUE
Minimum signal-to-noise ratio of three channel gains divided by DUE, channel gain of first channel gain between CUE and base station are described
Channel gain of the second channel gain between the first D2D centering transmitting terminal and base station, the third channel gain are first
Channel gain between D2D centering transmitting terminal and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 5th channel gain, described first
Whether channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and described first
Channel gain of the channel gain between CUE and base station, the third channel gain are the first D2D centering transmitting terminal and receiving end
Between channel gain, the 5th channel gain be D2D pairs in CUE or the first frequency spectrum with the first D2D centering receiving end it
Between channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the 5th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum noise of CUE
Than, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first channel gain
The product of minimum signal-to-noise ratio and second channel gain greater than DUE, first channel gain are big divided by the minimum signal-to-noise ratio of CUE
It is greater than the minimum signal-to-noise ratio and the 5th channel of DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE in third channel gain
The product of gain, first channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of CUE to be believed divided by the minimum of DUE
Make an uproar ratio, and the product between thermal noise and the third channel gain be greater than for transmission power, first channel gain with
And the product of the second channel gain, and the product between thermal noise and the third channel gain is greater than for emitting function
When the product of rate, first channel gain and the 5th channel gain, judgement obtain it is described to the first D2D to meeting the
The minimal communications quality of each user in one frequency spectrum.
On the other hand, the embodiment of the invention also discloses a kind of devices of resource allocation, comprising:
First acquisition unit, for obtaining straight-through D2D pairs of first terminal, the first D2D is to being candidate D2D in set
Maximum D2D pairs of channel gain, the candidate D2D is to D2D pairs including at least one resource to be allocated in set；
Second acquisition unit, for obtaining the first frequency spectrum, first frequency spectrum is any one in current reusable frequency spectrum
It is a, for preparing D2D pairs of access the described first；
Execution unit, for when the described first D2D pairs meet first frequency spectrum between in first frequency spectrum each
When the minimal communications quality of user, by the first D2D in access first frequency spectrum.
Further, the execution unit, comprising:
First obtains module, and for obtaining the first signal-to-noise ratio and the second signal-to-noise ratio, first signal-to-noise ratio is described the
One D2D pairs of signal-to-noise ratio, second signal-to-noise ratio are the signal-to-noise ratio of the phone user CUE in first frequency spectrum；
Second obtains module, and for obtaining first distance and second distance, the first distance is the described first D2D pairs
The distance between middle transmitting terminal and base station, the second distance are the first D2D centering receiving end and the CUE or have accessed
The D2D of first frequency spectrum to the distance between；
Judgment module, for according to first signal-to-noise ratio, second signal-to-noise ratio, the first distance and described the
Two distances judge the first D2D to whether meeting the first frequency in conjunction with the user type and number accessed in current first frequency spectrum
The minimal communications quality of each user in spectrum；
AM access module, for when meeting the minimal communications quality of each user in the first frequency spectrum, by the described first D2D pairs
It accesses in first frequency spectrum.
Further, the judging unit, is specifically used for:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；
Judge whether the first distance is greater than third distance, whether the second distance is greater than third distance, and described
Three distances are protection zone radius of the first D2D to, base station；
When in first frequency spectrum there is only when CUE, judge the first channel gain whether be greater than the minimum signal-to-noise ratio of CUE with
The product of second channel gain, first channel gain increase divided by whether the minimum signal-to-noise ratio of CUE is less than or equal to third channel
Minimum signal-to-noise ratio of the benefit divided by DUE, channel gain of first channel gain between CUE and base station, the second channel
Channel gain of the gain between the first D2D centering transmitting terminal and base station, the third channel gain are the first D2D centering transmitting
Channel gain between end and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 4th channel gain, described first
Whether channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and described first
Channel gain of the channel gain between CUE and base station, the third channel gain are the first D2D centering transmitting terminal and receiving end
Between channel gain, channel gain of the 4th channel gain between CUE and the first D2D centering receiving end；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the 4th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum noise of CUE
Than, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first channel gain
The product of minimum signal-to-noise ratio and second channel gain greater than DUE, first channel gain are big divided by the minimum signal-to-noise ratio of CUE
It is greater than the minimum signal-to-noise ratio and the 4th channel of DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE in third channel gain
The product of gain, first channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of CUE to be believed divided by the minimum of DUE
Make an uproar ratio, and the product between thermal noise and the third channel gain be greater than for transmission power, first channel gain with
And the product of the second channel gain, and the product between thermal noise and the third channel gain is greater than for emitting function
When the product of rate, first channel gain and the 4th channel gain, judgement obtain it is described to the first D2D to meeting the
The minimal communications quality of each user in one frequency spectrum.
Further, the judging unit, is specifically used for:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；
Judge whether the first distance is greater than third distance, whether the second distance is greater than third distance, and described
Three distances are protection zone radius of the first D2D to, base station；
When existing simultaneously CUE and DUE in first frequency spectrum, judge whether the first channel gain is greater than the minimum of CUE
Whether the product of signal-to-noise ratio and second channel gain, first channel gain are less than or equal to divided by the minimum signal-to-noise ratio of CUE
Minimum signal-to-noise ratio of three channel gains divided by DUE, channel gain of first channel gain between CUE and base station are described
Channel gain of the second channel gain between the first D2D centering transmitting terminal and base station, the third channel gain are first
Channel gain between D2D centering transmitting terminal and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 5th channel gain, described first
Whether channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and described first
Channel gain of the channel gain between CUE and base station, the third channel gain are the first D2D centering transmitting terminal and receiving end
Between channel gain, the 5th channel gain be D2D pairs in CUE or the first frequency spectrum with the first D2D centering receiving end it
Between channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the 5th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum noise of CUE
Than, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first channel gain
The product of minimum signal-to-noise ratio and second channel gain greater than DUE, first channel gain are big divided by the minimum signal-to-noise ratio of CUE
It is greater than the minimum signal-to-noise ratio and the 5th channel of DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE in third channel gain
The product of gain, first channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of CUE to be believed divided by the minimum of DUE
Make an uproar ratio, and the product between thermal noise and the third channel gain be greater than for transmission power, first channel gain with
And the product of the second channel gain, and the product between thermal noise and the third channel gain is greater than for emitting function
When the product of rate, first channel gain and the 5th channel gain, judgement obtain it is described to the first D2D to meeting the
The minimal communications quality of each user in one frequency spectrum.
The embodiment of the present invention includes following advantages:
In embodiments of the present invention, by obtaining straight-through D2D pairs of first terminal, the first D2D is to being candidate D2D to collection
Maximum D2D pairs of channel gain in conjunction, the candidate D2D is to D2D pairs including at least one resource to be allocated in set；It obtains
First frequency spectrum, first frequency spectrum is any one in current reusable frequency spectrum, for preparing D2D pairs of access the described first；
When the described first D2D pairs meet the minimal communications quality of each user in first frequency spectrum between first frequency spectrum when,
By the first D2D to accessing in first frequency spectrum, in guaranteeing the first frequency spectrum on the basis of QoS of customer, building with
Maximize the Optimized model that the D2D logarithm that grid can access simultaneously is target.Pass through analysis cellular link and D2D link
Channel conditions find the best multiplexing set before phone user and D2D user, improve D2D access rate and power system capacity.
Detailed description of the invention
Fig. 1 is a kind of step flow chart of the method for resource allocation of the invention；
Fig. 2 is the step flow chart of step 103 in method shown in Fig. 1；
Fig. 3 is a kind of step flow chart of the method for resource allocation of the invention；
Fig. 4 is a kind of structural block diagram of the Installation practice of resource allocation of the invention；
Fig. 5 is the structural block diagram of execution unit in structure shown in Fig. 4
Fig. 6 is a kind of architecture of base station schematic diagram of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig.1, a kind of step flow chart of the method for resource allocation of the invention is shown, can specifically include as follows
Step:
Step 101, D2D pairs of acquisition the first.
Wherein, the first D2D is described D2D pairs candidate to for D2D couples maximum to channel gain in set of candidate D2D
It include D2D pairs of at least one resource to be allocated in set.
Step 102 obtains the first frequency spectrum.
Wherein, first frequency spectrum is any one in current reusable frequency spectrum, accesses the first D2D for preparing
It is right.
Step 103, when the described first D2D pairs meet each user in first frequency spectrum between first frequency spectrum
When minimal communications quality, by the first D2D in access first frequency spectrum.
In embodiments of the present invention, by obtaining straight-through D2D pairs of first terminal, the first D2D is to being candidate D2D to collection
Maximum D2D pairs of channel gain in conjunction, the candidate D2D is to D2D pairs including at least one resource to be allocated in set；It obtains
First frequency spectrum, first frequency spectrum is any one in current reusable frequency spectrum, for preparing D2D pairs of access the described first；
When the described first D2D pairs meet the minimal communications quality of each user in first frequency spectrum between first frequency spectrum when,
By the first D2D to accessing in first frequency spectrum, in guaranteeing the first frequency spectrum on the basis of QoS of customer, building with
Maximize the Optimized model that the D2D logarithm that grid can access simultaneously is target.Pass through analysis cellular link and D2D link
Channel conditions find the best multiplexing set before phone user and D2D user, improve D2D access rate and power system capacity.
As shown in Fig. 2, in one embodiment, step 103 described in above-described embodiment, as shown in Fig. 2, may include:
Step 201 obtains the first signal-to-noise ratio and the second signal-to-noise ratio.
Wherein, first signal-to-noise ratio is the described first D2D pairs of signal-to-noise ratio, and second signal-to-noise ratio is first frequency
The signal-to-noise ratio of phone user CUE in spectrum.
In the present embodiment, first signal-to-noise ratio can be according to the transmission power of the first D2D centering transmitting terminal, first
The CUE in channel gain and the first frequency spectrum between the transmitting terminal and receiving end of D2D centering is to the first D2D pairs of application
Interference obtains.It is worth noting that when in first frequency spectrum there are other D2D clock synchronizations, first signal-to-noise ratio also need by
Other D2D take into account the interference of application to the first D2D.
In addition, second signal-to-noise ratio can the D2D according to present in the transmission power of CUE, the first frequency spectrum to CUE
Interference and CUE and base station between channel gain obtain.
Step 202 obtains first distance and second distance.
Wherein, the first distance is the distance between the first D2D centering transmitting terminal and base station, the second distance
For the first D2D centering receiving end and the CUE or accessed the D2D of the first frequency spectrum to the distance between.
Step 203, according to first signal-to-noise ratio, second signal-to-noise ratio, the first distance and described second away from
From judging the first D2D to whether meeting the first frequency spectrum in conjunction with the user type and number accessed in current first frequency spectrum
In each user minimal communications quality.
In one embodiment, it can carry out judging the first D2D to whether meeting the first frequency by following judgment mode
The minimal communications quality of each user in spectrum:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；Judge whether the first distance is greater than third distance, the second distance whether be greater than third away from
It is the first D2D to the protection zone radius of, base station from, third distance；When in first frequency spectrum there is only when CUE, judgement
Whether the first channel gain is greater than the minimum signal-to-noise ratio of CUE and the product of second channel gain, first channel gain divided by
Whether the minimum signal-to-noise ratio of CUE is less than or equal to third channel gain divided by the minimum signal-to-noise ratio of DUE, and first channel gain is
Channel gain between CUE and base station, channel of the second channel gain between the first D2D centering transmitting terminal and base station increase
Benefit, channel gain of the third channel gain between the first D2D centering transmitting terminal and receiving end；Judge third channel gain
Whether greater than DUE minimum signal-to-noise ratio and the 4th channel gain product, first channel gain divided by CUE minimum noise
Than whether being greater than minimum signal-to-noise ratio of the third channel gain divided by DUE, letter of first channel gain between CUE and base station
Road gain, channel gain of the third channel gain between the first D2D centering transmitting terminal and receiving end, the 4th noise
Than the channel gain between CUE and the first D2D centering receiving end；Judge multiplying between thermal noise and the third channel gain
Whether product is greater than the product for transmission power, first channel gain and the second channel gain；Judge thermal noise
Whether the product between the third channel gain is greater than for transmission power, first channel gain and the described 4th
The product of channel gain；When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than CUE most
Small signal-to-noise ratio, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first letter
Minimum signal-to-noise ratio of the road gain greater than CUE and the second letter arrive the product of gain, and first channel gain is believed divided by the minimum of CUE
It makes an uproar than the minimum signal-to-noise ratio for being less than or equal to third channel gain divided by the minimum signal-to-noise ratio or third channel gain of DUE greater than DUE
With the product of the 4th channel gain, first channel gain divided by CUE minimum signal-to-noise ratio be greater than third channel gain divided by
The minimum signal-to-noise ratio of DUE, and the product between thermal noise and the third channel gain is greater than for transmission power, described first
Channel gain and the product of the second channel gain, and the product between thermal noise and the third channel gain is greater than use
When the product of transmission power, first channel gain and the 4th channel gain, judgement obtains described to the first D2D
To the minimal communications quality for meeting each user in the first frequency spectrum.
In another embodiment, it can carry out judging the first D2D to whether meeting the first frequency by following judgment mode
The minimal communications quality of each user in spectrum:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；Judge whether the first distance is greater than third distance, the second distance whether be greater than third away from
It is the first D2D to the protection zone radius of, base station from, third distance；When existing simultaneously CUE and DUE in first frequency spectrum
When, judge whether the first channel gain is greater than the minimum signal-to-noise ratio of CUE and the product of second channel gain, first channel increases
Whether benefit is less than or equal to third channel gain divided by the minimum signal-to-noise ratio of DUE, first letter divided by the minimum signal-to-noise ratio of CUE
Channel gain of the road gain between CUE and base station, the second channel gain be the first D2D centering transmitting terminal and base station it
Between channel gain, channel gain of the third channel gain between the first D2D centering transmitting terminal and receiving end；Judge
Whether three channel gains are greater than the minimum signal-to-noise ratio of DUE and the product of the 5th channel gain, and first channel gain is divided by CUE
Minimum signal-to-noise ratio whether be greater than third channel gain divided by the minimum signal-to-noise ratio of DUE, first channel gain be CUE with
Channel gain between base station, channel gain of the third channel gain between the first D2D centering transmitting terminal and receiving end,
5th channel gain is the D2D pairs of channel gain between the first D2D centering receiving end in CUE or the first frequency spectrum；Sentence
Product between disconnected thermal noise and the third channel gain whether be greater than for transmission power, first channel gain and
The product of the second channel gain；Judge whether the product between thermal noise and the third channel gain is greater than for emitting
The product of power, first channel gain and the 5th channel gain；When first signal-to-noise ratio is greater than the minimum of DUE
Signal-to-noise ratio, second signal-to-noise ratio is greater than the minimum signal-to-noise ratio of CUE, and the first distance is greater than the third distance, described
Second distance is greater than the third distance, and minimum signal-to-noise ratio of first channel gain greater than CUE and the second letter multiplying to gain
Product, first channel gain are less than or equal to third channel gain divided by the minimum noise of DUE divided by the minimum signal-to-noise ratio of CUE
Than or third channel gain greater than DUE minimum signal-to-noise ratio with the 5th letter arrive gain product, it is described first letter arrive gain divided by
The minimum signal-to-noise ratio of CUE is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE, and thermal noise and the third channel gain
Between product be greater than the product for transmission power, first channel gain and the second channel gain, and heat is made an uproar
Product between sound and the third channel gain is greater than for transmission power, first channel gain and the 5th letter
When the product of road gain, judgement obtains the minimal communications quality to the first D2D to each user in the first frequency spectrum of satisfaction.
Step 204, when meet the first frequency spectrum in each user minimal communications quality when, by the first D2D to access
In first frequency spectrum.
It is worth noting that in above-described embodiment when judging result is unsatisfactory for Rule of judgment, if not because of the first frequency spectrum
Meet condition, then delete the frequency spectrum for the condition that is unsatisfactory for from current reusable frequency spectrum, and appoints from current reusable frequency spectrum again
Meaning selects a frequency spectrum as the first frequency spectrum and the first D2D to being matched until currently without reusable frequency spectrum or candidate
D2D collection is combined into sky；If because D2D to the condition that is unsatisfactory for, chooses the D2D except the condition that is unsatisfactory for from candidate D2D set again
D2D maximum to channel gain in addition to as the first D2D pairs matched with the first frequency spectrum until currently without reusable frequency spectrum
Or candidate's D2D collection is combined into sky.
For the method for making those skilled in the art better understand resource allocation provided in an embodiment of the present invention, in conjunction with being
System model is described in detail.
Within the system, C is used respectivelyN=1,2 ..., NcAnd DN=1,2 ..., NdIndicate phone user
(cellular user equipments, CUEs) set and candidate D2D are to set, wherein NcAnd NdRespectively indicate CUEs and time
Select D2D pairs of maximum number.Also,The D2D of access is used to represent to (it is, the D2D of activation to) set, table
The frequency spectrum resource given instructions in reply with i-th of CUE.
It is worth noting that the corresponding frequency spectrum of each CUE and only a corresponding frequency spectrum, CN=1,2 ..., NcCan also
To indicate the set of frequency spectrum corresponding to CUEs.
As shown in figure 3, the method for resource allocation provided in an embodiment of the present invention, is based on above system model, including following
Step:
1, in phone user's set CNOne phone user C of middle selectioni, and CiSignal-to-noise ratio be greater than
In this step, CiAny one phone user in, herein without limitation, it is only necessary to change phone user and belong to bee
Nest user set.The i.e. corresponding reusable frequency spectrum of one phone user.
2, candidate D2D is calculated to set DNChannel gain g between middle D2D couplesj, and select and possess maximum channel gain
D2D is to Dj, and DjSignal-to-noise ratio be greater than
3, for Ci, work as φiThe size of set is 0, if CiAnd DjBetween meet first object condition, then go to step
306, otherwise go to step 305.
In the present embodiment, the first object condition are as follows: dj,B> d, di,j> d,N0gj>P0gj,Bgi,B, N0gj>P0gi, jgi,B。
Wherein, dj,BIndicate the distance between D2D transmitting terminal and base station, di,jIt indicates between phone user and the receiving end D2D
Distance, d be base station and the receiving end D2D protection zone radius, gi,BChannel gain between phone user and base station, gj,BFor
Channel gain between D2D transmitting terminal and base station, gi,jFor the channel gain between phone user and the receiving end D2D, P0For user
Transmission power, N0For thermal noise,WithRespectively indicate the minimum signal-to-noise ratio of phone user and D2D user.
4, for Ci, work as φiSet sizes are greater than 0, if Ci, Dj, DkBetween meet the second goal condition, then go to step
306, otherwise go to step 305.
In the present embodiment, second goal condition are as follows: dj,B> d, dt,j> d,N0gj>P0gj,Bgi,B, N0gj>P0gt, jgi,B。
Wherein, DkFor the D2D user with phone user's multiplexed resource, dt,jIndicate phone user or DkTransmitting terminal arrives
DjThe distance between receiving end, gt,jIndicate phone user or DkTransmitting terminal and DjChannel gain between receiving end.
5, from DNMiddle searching channel gain is only second to DjD2D to repeat step 3,4.
6, C is calculatedi, Dj, DkSignal-to-noise ratioJudge whether to meet
Specifically,
Wherein,WithRespectively indicate CiAnd DjMinimum SIR requirement,WithRespectively indicate CiWith j-th of D2D
The transimission power of transmitting terminal, N0It is used to indicate thermal noise, gi,BIndicate CiChannel gain between corresponding base station, gj,BIndicate jth
Channel gain between a D2D transmitting terminal and corresponding base station.Therefore, gjIt is used to indicate DjRespective channel gain, gi,jIndicate Ci
Channel gain between j-th of receiving end D2D.
7, the D if meetingj∈φi, and in DNMiddle removal Dj, execute step 8.Otherwise meetingThe case where
Lower execution step 5, is being unsatisfactory forIn the case where by CiFrom CNMiddle removal executes step 9.
8, judge DNWhether it is 0, is then ending resource distribution, it is no to then follow the steps 2.
9, judge CNWhether it is 0, is then ending resource distribution, it is no to then follow the steps 1.
Referring to Fig. 4, a kind of structural schematic diagram of the device of resource allocation of the invention is shown, comprising:
First acquisition unit 401, for obtaining straight-through D2D pairs of first terminal, the first D2D is to being candidate D2D to collection
Maximum D2D pairs of channel gain in conjunction, the candidate D2D is to D2D pairs including at least one resource to be allocated in set；
Second acquisition unit 402, for obtaining the first frequency spectrum, first frequency spectrum is any in current reusable frequency spectrum
One, for preparing D2D pairs of access the described first；
Execution unit 403, for when the described first D2D pairs meet first frequency spectrum between in first frequency spectrum often
When the minimal communications quality of a user, by the first D2D in access first frequency spectrum.
In embodiments of the present invention, by obtaining straight-through D2D pairs of first terminal, the first D2D is to being candidate D2D to collection
Maximum D2D pairs of channel gain in conjunction, the candidate D2D is to D2D pairs including at least one resource to be allocated in set；It obtains
First frequency spectrum, first frequency spectrum is any one in current reusable frequency spectrum, for preparing D2D pairs of access the described first；
When the described first D2D pairs meet the minimal communications quality of each user in first frequency spectrum between first frequency spectrum when,
By the first D2D to accessing in first frequency spectrum, in guaranteeing the first frequency spectrum on the basis of QoS of customer, building with
Maximize the Optimized model that the D2D logarithm that grid can access simultaneously is target.Pass through analysis cellular link and D2D link
Channel conditions find the best multiplexing set before phone user and D2D user, improve D2D access rate and power system capacity.
In one embodiment, as shown in figure 5, execution unit 403, comprising:
First obtains module 501, and for obtaining the first signal-to-noise ratio and the second signal-to-noise ratio, first signal-to-noise ratio is described
First D2D pairs of signal-to-noise ratio, second signal-to-noise ratio are the signal-to-noise ratio of the phone user CUE in first frequency spectrum；
Second obtains module 502, and for obtaining first distance and second distance, the first distance is described first
The distance between D2D centering transmitting terminal and base station, the second distance be the first D2D centering receiving end and the CUE or
Accessed the D2D of the first frequency spectrum to the distance between；
Judgment module 503, for according to first signal-to-noise ratio, second signal-to-noise ratio, the first distance and institute
Second distance is stated, in conjunction with the user type and number accessed in current first frequency spectrum, judges the first D2D to whether meeting
The minimal communications quality of each user in one frequency spectrum；
AM access module 504, for when meet the first frequency spectrum in each user minimal communications quality when, by described first
D2D is in access first frequency spectrum.
In one embodiment, the judging unit 503, is specifically used for:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；
Judge whether the first distance is greater than third distance, whether the second distance is greater than third distance, and described
Three distances are protection zone radius of the first D2D to, base station；
When in first frequency spectrum there is only when CUE, judge the first channel gain whether be greater than the minimum signal-to-noise ratio of CUE with
The product of second channel gain, first channel gain increase divided by whether the minimum signal-to-noise ratio of CUE is less than or equal to third channel
Minimum signal-to-noise ratio of the benefit divided by DUE, channel gain of first channel gain between CUE and base station, the second channel
Channel gain of the gain between the first D2D centering transmitting terminal and base station, the third channel gain are the first D2D centering transmitting
Channel gain between end and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 4th channel gain, described first
Whether channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and described first
Channel gain of the channel gain between CUE and base station, the third channel gain are the first D2D centering transmitting terminal and receiving end
Between channel gain, channel gain of the 4th channel gain between CUE and the first D2D centering receiving end；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the 4th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum noise of CUE
Than, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first channel gain
The product of minimum signal-to-noise ratio and second channel gain greater than CUE, first channel gain are small divided by the minimum signal-to-noise ratio of CUE
In the minimum signal-to-noise ratio and the 4th for being greater than DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE equal to third channel gain
The product of channel gain, first channel gain are greater than third channel gain divided by DUE's divided by the minimum signal-to-noise ratio of CUE
Minimum signal-to-noise ratio, and the product between thermal noise and the third channel gain is greater than for transmission power, first channel
The product of gain and the second channel gain, and the product between thermal noise and the third channel gain is greater than for sending out
When penetrating the product of power, first channel gain and the 4th channel gain, judgement obtain it is described to the first D2D to full
The minimal communications quality of each user in the first frequency spectrum of foot.
In one embodiment, the judging unit 503, is specifically used for:
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than
The minimum signal-to-noise ratio of CUE；
Judge whether the first distance is greater than third distance, whether the second distance is greater than third distance, and described
Three distances are protection zone radius of the first D2D to, base station；
When existing simultaneously CUE and DUE in first frequency spectrum, judge whether the first channel gain is greater than the minimum of CUE
Whether the product of signal-to-noise ratio and second channel gain, first channel gain are less than or equal to divided by the minimum signal-to-noise ratio of CUE
Minimum signal-to-noise ratio of three channel gains divided by DUE, channel gain of first channel gain between CUE and base station are described
Channel gain of the second channel gain between the first D2D centering transmitting terminal and base station, the third channel gain are first
Channel gain between D2D centering transmitting terminal and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 5th channel gain, described first
Whether channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and described first
Channel gain of the channel gain between CUE and base station, the third channel gain are the first D2D centering transmitting terminal and receiving end
Between channel gain, the 5th channel gain be D2D pairs in CUE or the first frequency spectrum with the first D2D centering receiving end it
Between channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first letter
The product of road gain and the 5th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum noise of CUE
Than, and the first distance is greater than the third distance, the second distance is greater than the third distance, and the first channel gain
The product of minimum signal-to-noise ratio and second channel gain greater than CUE, first channel gain are small divided by the minimum signal-to-noise ratio of CUE
In the minimum signal-to-noise ratio and the 5th for being greater than DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE equal to third channel gain
The product of channel gain, first channel gain are greater than third channel gain divided by DUE's divided by the minimum signal-to-noise ratio of CUE
Minimum signal-to-noise ratio, and the product between thermal noise and the third channel gain is greater than for transmission power, first channel
The product of gain and the second channel gain, and the product between thermal noise and the third channel gain is greater than for sending out
When penetrating the product of power, first channel gain and the 5th channel gain, judgement obtain it is described to the first D2D to full
The minimal communications quality of each user in the first frequency spectrum of foot.
Fig. 6 is a kind of base station shown according to an exemplary embodiment.Base station described in example may include Fig. 4 and Fig. 5
Shown in distribute resource device.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile for this
The those skilled in the art in field, according to the thought of the present invention, there will be changes in the specific implementation manner and application range,
In conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (2)
1. a kind of method of resource allocation characterized by comprising
Obtain straight-through D2D pairs of first terminal, the first D2D to for D2D couples maximum to channel gain in set of candidate D2D,
The candidate D2D is to including D2D pairs of at least one resource to be allocated in set, and the first D2D is to for money to be allocated
D2D pairs of source；
Obtain the first frequency spectrum, first frequency spectrum is any one in current reusable frequency spectrum, for preparing access described the
One D2D pairs；
Obtaining the first signal-to-noise ratio and the second signal-to-noise ratio, first signal-to-noise ratio is the described first D2D pairs of signal-to-noise ratio, described the
Two signal-to-noise ratio are the signal-to-noise ratio of the phone user CUE in first frequency spectrum；
First distance and second distance are obtained, the first distance is between the first D2D centering transmitting terminal and base station
Distance, the second distance are the distance between the first D2D centering receiving end and described CUE；
Judge whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, whether the second signal-to-noise ratio is greater than CUE's
Minimum signal-to-noise ratio；
Judge whether the first distance is greater than third distance, whether the second distance is greater than third distance, the third away from
From the protection zone radius for the first D2D to, base station；
Judge whether the first channel gain is greater than the minimum signal-to-noise ratio of CUE and the product of second channel gain, first channel
Whether gain is less than or equal to third channel gain divided by the minimum signal-to-noise ratio of DUE, first letter divided by the minimum signal-to-noise ratio of CUE
Channel gain of the road gain between CUE and base station, the second channel gain is between the first D2D centering transmitting terminal and base station
Channel gain, channel gain of the third channel gain between the first D2D centering transmitting terminal and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 4th channel gain, first channel
Whether gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and first channel increases
Channel gain of the benefit between CUE and base station, the third channel gain is between the first D2D centering transmitting terminal and receiving end
Channel gain, channel gain of the 4th channel gain between CUE and the first D2D centering receiving end；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first channel increasing
The product of beneficial and described first channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first channel increasing
The product of beneficial and described 4th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum signal-to-noise ratio of CUE, and
The first distance is greater than the third distance, and the second distance is greater than the third distance, and the first channel gain is greater than
The product of the minimum signal-to-noise ratio of CUE and second channel gain, first channel gain are less than etc. divided by the minimum signal-to-noise ratio of CUE
It is greater than the minimum signal-to-noise ratio and the 4th channel of DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE in third channel gain
The product of gain, first channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of CUE to be believed divided by the minimum of DUE
Make an uproar ratio, and the product between thermal noise and the third channel gain be greater than for transmission power, first channel gain with
And the product of first channel gain, and the product between thermal noise and the third channel gain is greater than for emitting function
When the product of rate, first channel gain and the 4th channel gain, judgement obtains the first D2D to satisfaction first
The minimal communications quality of each user in frequency spectrum；
When meeting the minimal communications quality of each user in the first frequency spectrum, by the first D2D to access first frequency spectrum
In.
2. a kind of device of resource allocation characterized by comprising
First acquisition unit, for obtaining straight-through D2D pairs of first terminal, the first D2D is to being candidate D2D to channel in set
Maximum D2D pairs of gain, the candidate D2D is to including D2D pairs of at least one resource to be allocated in set, and described first
D2D is to D2D pairs for resource to be allocated；
Second acquisition unit, for obtaining the first frequency spectrum, first frequency spectrum is any one in current reusable frequency spectrum, is used
In D2D pairs of preparation access the described first；
Execution unit, for when the described first D2D pairs meet each user in first frequency spectrum between first frequency spectrum
Minimal communications quality when, by the first D2D to accessing in first frequency spectrum；
Execution unit, comprising:
First obtains module, and for obtaining the first signal-to-noise ratio and the second signal-to-noise ratio, first signal-to-noise ratio is the first D2D
Pair signal-to-noise ratio, second signal-to-noise ratio be first frequency spectrum in phone user CUE signal-to-noise ratio；
Second obtains module, and for obtaining first distance and second distance, the first distance is the first D2D centering hair
The distance between end and base station are penetrated, the second distance is the distance between the first D2D centering receiving end and described CUE；
Judgment module, for judging whether first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of D2D user DUE, the second signal-to-noise ratio
Whether the minimum signal-to-noise ratio of CUE is greater than；
Judge whether the first distance is greater than third distance, whether the second distance is greater than third distance, the third away from
From the protection zone radius for the first D2D to, base station；
Judge whether the first channel gain is greater than the minimum signal-to-noise ratio of CUE and the product of second channel gain, first channel
Whether gain is less than or equal to third channel gain divided by the minimum signal-to-noise ratio of DUE, first letter divided by the minimum signal-to-noise ratio of CUE
Channel gain of the road gain between CUE and base station, the second channel gain is between the first D2D centering transmitting terminal and base station
Channel gain, channel gain of the third channel gain between the first D2D centering transmitting terminal and receiving end；
Judge whether third channel gain is greater than the minimum signal-to-noise ratio of DUE and the product of the 4th channel gain, first channel
Whether gain is greater than third channel gain divided by the minimum signal-to-noise ratio of DUE divided by the minimum signal-to-noise ratio of CUE, and first channel increases
Channel gain of the benefit between CUE and base station, the third channel gain is between the first D2D centering transmitting terminal and receiving end
Channel gain, channel gain of the 4th channel gain between CUE and the first D2D centering receiving end；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first channel increasing
The product of the beneficial and described second channel gain；
Judge whether the product between thermal noise and the third channel gain is greater than for transmission power, first channel increasing
The product of beneficial and described 4th channel gain；
When first signal-to-noise ratio is greater than the minimum signal-to-noise ratio of DUE, second signal-to-noise ratio is greater than the minimum signal-to-noise ratio of CUE, and
The first distance is greater than the third distance, and the second distance is greater than the third distance, and the first channel gain is greater than
The product of the minimum signal-to-noise ratio of DUE and second channel gain, first channel gain are less than etc. divided by the minimum signal-to-noise ratio of CUE
It is greater than the minimum signal-to-noise ratio and the 4th channel of DUE divided by the minimum signal-to-noise ratio or third channel gain of DUE in third channel gain
The product of gain, first channel gain is greater than third channel gain divided by the minimum signal-to-noise ratio of CUE to be believed divided by the minimum of DUE
Make an uproar ratio, and the product between thermal noise and the third channel gain be greater than for transmission power, first channel gain with
And the product of the second channel gain, and the product between thermal noise and the third channel gain is greater than for emitting function
When the product of rate, first channel gain and the 4th channel gain, judgement obtains the first D2D to satisfaction first
The minimal communications quality of each user in frequency spectrum；
AM access module, for when meet the first frequency spectrum in each user minimal communications quality when, by the first D2D to access
In first frequency spectrum.
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|---|---|---|---|---|
| CN103354641A (en) * | 2013-07-20 | 2013-10-16 | 西安电子科技大学 | Resource distribution method of D2D communication in LTE-A cellular network |
| CN103889061A (en) * | 2014-02-18 | 2014-06-25 | 南京邮电大学 | D2D user resource distribution method based on multicarrier communication |
| CN104780610A (en) * | 2015-03-17 | 2015-07-15 | 南京邮电大学 | A resource allocating method based on terminal direct communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354641A (en) * | 2013-07-20 | 2013-10-16 | 西安电子科技大学 | Resource distribution method of D2D communication in LTE-A cellular network |
| CN103889061A (en) * | 2014-02-18 | 2014-06-25 | 南京邮电大学 | D2D user resource distribution method based on multicarrier communication |
| CN104780610A (en) * | 2015-03-17 | 2015-07-15 | 南京邮电大学 | A resource allocating method based on terminal direct communication |
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