CN107241736B - Channel allocation method for sharing frequency spectrum between D2D user and cellular user - Google Patents
Channel allocation method for sharing frequency spectrum between D2D user and cellular userDownload PDFInfo
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- CN107241736B CN107241736BCN201710346646.9ACN201710346646ACN107241736BCN 107241736 BCN107241736 BCN 107241736BCN 201710346646 ACN201710346646 ACN 201710346646ACN 107241736 BCN107241736 BCN 107241736B
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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
- H04W16/14—Spectrum sharing arrangements between different networks
- 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
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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Abstract
Translated fromChinese
Description
Technical Field
The invention relates to a channel allocation method for sharing a spectrum between a D2D user and a cellular user.
Background
As one of the key technologies in the future 5G communication system, the D2D communication technology is considered to be capable of effectively offloading cellular data, thereby reducing the transmission load on the core network. Due to the short distance between the transceiver in the D2D communication, the D2D transceiver pair can share the same frequency spectrum with the cellular users at a longer distance. Since multiplexing a channel causes interference to cellular users sharing the channel, pairing of the cellular users and the D2D users needs to be performed reasonably according to channel conditions. When multiplexing cellular resources, how to properly select the multiplexed channels becomes a key influencing the capacity performance of the system, so that the system performance can be effectively improved through reasonable channel allocation under the condition of meeting the specified rate and power constraint requirements.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a channel allocation method for sharing a frequency spectrum between a D2D user and a cellular user, and the method is lower in complexity and higher.
The technical scheme is as follows: the power allocation method for sharing the frequency spectrum between the D2D user and the cellular user comprises the following steps:
s1, initializing channel resource pool
D2D user resource pool
Wherein, N is the number of cell channels, and K is the number of D2D users;
s2, for D2D user
To allocate energy to it
Maximum channel
Indicating variable ofchannel
Setting 1, and distributing channel n and D2D user k from resource pool
And
deleting; wherein, Δ Rk,nAnd Δ Ik,nThe increased system capacity and introduced system interference for the multiplexed channel n of D2D user k respectively,
a value of 1 indicates that channel n is assigned to D2D user k;
s3, return to S2 and go back to
S4, judging whether the current distribution scheme meets the preset constraint condition C1, if so, directly outputting the current channel distribution scheme, otherwise, executing S5; wherein the preset constraint condition C1 is: rn≥Rmin,
RnReachable data rate, R, for cellular user nminA minimum transmission rate requirement for cellular users;
s5, initializing channel resource pool
For initialising D2DHousehold resource pool
S6, resource pool for D2D users
If present, each of D2D users k
So that the constraint C1 is satisfied and the system performance Δ Ik′,n-ΔIk′,n′If the value is larger than zero and reaches the maximum, releasing the originally distributed channel n to the resource pool
Allocates a new channel n 'to it and removes D2D user k' from the resource pool
Deleting;
s7, if the redistribution is finished
The current channel allocation scheme is output, otherwise, the no channel allocation scheme is output.
Wherein the selection rule in step S2 is that
The largest channel n is allocated to user k.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: while targeting maximum system capacity and minimum interference and taking into account the rate constraints of the cellular users. The channel allocation scheme is simple and also in implementation.
Drawings
Fig. 1 is a schematic diagram of a network of the present invention.
Detailed Description
The network diagram of the present embodiment is shown in fig. 1, considering N cellular users and K cellular usersThe D2D user pair multiplexes uplink cell channel resources. By using
Represents a set of cell channel resources and also represents a set of cellular users, and the set of all D2D user numbers is
Let the transmission power of channel multiplexing between user k and cellular user n be
At this time, the SINR obtained by the D2D user on the channel n is
Wherein h isk,nIs the channel response of the D2D user on channel n,
is cellular user interference from a base station (where
Is the interference channel, p, between the base station and D2D user knIs the transmit power of cellular user n),
is the variance of Gaussian white noise, thereby obtaining the achievable data rate of user k
Similarly, the SINR of cellular user n is
The transmission rate of the system from the D2D user k multiplexed channel n is thus increased by an amount of
However, when D2D multiplexing is introduced, the amount of interference in the system is increased by
The channel allocation problem can therefore be viewed as a multi-objective function as follows
It can be seen that the channel allocation scheme can be variably indicated
It is indicated that when a subchannel n is assigned to user k, its value is 1; otherwise the value is 0. Wherein R isminReferring to the minimum transmission rate requirement of cellular users, it is clear that the maximization problem is a non-convex combinatorial optimization problem.
Therefore, in order to solve this problem, the channel allocation method of this embodiment is used for allocation, and specifically includes the following steps:
s1, initializing channel resource pool
D2D user resource pool
Wherein, N is the number of cell channels, and K is the number of D2D users;
s2, for D2D user
To allocate energy to it
Maximum channel
Indicating variable ofchannel
Setting 1, and distributing channel n and D2D user k from resource pool
And
deleting; wherein, Δ Rk,nAnd Δ Ik,nThe increased system capacity and introduced system interference for the multiplexed channel n of D2D user k respectively,
a value of 1 indicates that channel n is assigned to D2D user k;
s3, return to S2 and go back to
S4, judging whether the current distribution scheme meets the preset constraint condition C1, if so, directly outputting the current channel distribution scheme, otherwise, executing S5; wherein the preset constraint condition C1 is: rn≥Rmin,
RnReachable data rate, R, for cellular user nminA minimum transmission rate requirement for cellular users;
s5, initializing channel resource pool
Initializing D2D user resource pools
S6, resource pool for D2D users
If present, each of D2D users k
So that the constraint C1 is satisfied and the system performance Δ Ik′,n-ΔIk′,n′If the value is larger than zero and reaches the maximum, releasing the originally distributed channel n to the resource pool
Allocates a new channel n 'to it and removes D2D user k' from the resource pool
Deleting;
s7, if the redistribution is finished
The current channel allocation scheme is output, otherwise, the no channel allocation scheme is output.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (2)
Translated fromChinese
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710346646.9ACN107241736B (en) | 2017-05-17 | 2017-05-17 | Channel allocation method for sharing frequency spectrum between D2D user and cellular user |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710346646.9ACN107241736B (en) | 2017-05-17 | 2017-05-17 | Channel allocation method for sharing frequency spectrum between D2D user and cellular user |
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| CN107241736A CN107241736A (en) | 2017-10-10 |
| CN107241736Btrue CN107241736B (en) | 2021-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111356139A (en) | 2018-12-21 | 2020-06-30 | 索尼公司 | Electronic device and method for wireless communication, computer readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012068731A1 (en)* | 2010-11-25 | 2012-05-31 | Nokia Corporation | Network assisted sensing on a shared band for local communications |
| CN106028348A (en)* | 2016-07-11 | 2016-10-12 | 东南大学 | A resource allocation method for cellular users in a D2D communication system |
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- 2017-05-17CNCN201710346646.9Apatent/CN107241736B/ennot_activeExpired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012068731A1 (en)* | 2010-11-25 | 2012-05-31 | Nokia Corporation | Network assisted sensing on a shared band for local communications |
| CN106028348A (en)* | 2016-07-11 | 2016-10-12 | 东南大学 | A resource allocation method for cellular users in a D2D communication system |
Non-Patent Citations (1)
| Title |
|---|
| 5G移动通信网络关键技术综述;赵国锋等;《重庆邮电大学学报》;20150831;第27卷(第4期);全文* |
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| CN107241736A (en) | 2017-10-10 |
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