CN102088736A - User position list-based method for selectively multiplexing multiple honeycomb user resources for device to device (D2D) user pairs - Google Patents
User position list-based method for selectively multiplexing multiple honeycomb user resources for device to device (D2D) user pairs Download PDFInfo
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Abstract
The technical scheme provided by the invention is applied to a honeycomb network of mobile communication. A device to device (D2D) technology is applied to the honeycomb network, so that D2D user pairs are allowed to multiplex the resources of honeycomb network users for communicating. The invention provides a user position list-based method for selectively multiplexing multiple honeycomb user resources for the D2D user pairs, which is used for selecting a plurality of honeycomb users farthest from the D2D user pairs for each pair of D2D users for resource multiplexing. By using the scheme provided by the invention, the complexity of an algorithm is lowered when a base station end selects a plurality of honeycomb users for resource multiplexing, and the interference between the resource multiplexing D2D user pairs and the honeycomb users is reduced to the maximum extent, so that the spectrum efficiency of an entire system is improved. Moreover, the method has high practical operability, is easy to implement in practice, and is applied more flexibly.
Description
Technical field
The present invention be with end-to-end (Device-to-Device, D2D) technology is applied to cellular network, D2D user communicates the resource of user in the multiplexing cellular network.Or other and in cellular network, use the communication network that the D2D technology has similar architected features.The present invention proposes a kind of D2D user who tabulates based on customer location to selecting multiplexing a plurality of phone user's resource, it can improve the spectrum efficiency of entire system (comprise cellular communication communicate by letter with D2D), and reduces the base station end is selected user's algorithm of multiplexed resource for D2D user complexity.The method that the present invention proposes has very strong actual operability.
Background technology
It is end-to-end that (Device-to-Device, D2D) communication is a kind of under the control of cellular system, allows the new technique that directly communicates by multiplexing intra-cell resource between the terminal.Thereby it have improve the system spectrum utilance, reduce end cell consumption save travelling carriage power, lower cellular base stations load, improve the system user fairness, improve wireless network QoS, consolidate understructure, new advantages such as service be provided.And can solve the problem of wireless communication system frequency spectrum resource scarcity to a certain extent.D2D communication is to be operated in licensed band in Cellular Networks, and it has lot of advantages with respect to other technology (as bluetooth, WLAN etc.) that is operated in non-licensed band.Have only licensed band can guarantee to provide and disturb controlled, stable communication environment, but not the service instability that licensed band provides, this is very important to quality of service requirement high business or specific user.
D2D communication under cellular architecture is by sharing the lifting that local resource reaches the entire system performance.When if the D2D allocation of communications arrives the channel resource of quadrature, it can not form the communication in the original cellular network and disturb.If when D2D communication was assigned to non-orthogonal channel resource, D2D communication will cause interference to the receiving terminal in the cellular link.In the less network of traffic load, can be the resource of the unnecessary quadrature of D2D allocation of communications, obviously like this can obtain better network overall performance.But, because the resource-constrained in the cellular network is considered that communication service is more and more higher to the requirement of frequency bandwidth, and is adopted the mode of nonopiate resource-sharing can make network that the higher level of resources utilization is arranged.This also is a main purpose of using D2D communication in cellular network.
Under nonopiate resource-sharing pattern, can there be multiple resource distribution mode the base station, and they can obtain different performance gains and implementation complexity at last.For example wherein realize the simplest mode, the base station can be selected the resource in the sub-district at random; In addition, the base station chosen distance D2D user that can also try one's best carries out resource-sharing to phone user's far away resource, guarantees to disturb between them as much as possible little like this.At present, D2D communication can come and phone user's shared resource by following three kinds of patterns:
1. base station Transfer Mode: D2D user communicates the switching by cellular network base station.Under this pattern, D2D user is the same with phone user's communication mode.D2D communication independently takies the resource of half, and second half is taken by cellular communication.All communication all divides and is equipped with independently channel resource of quadrature, and transmits with maximum power.This pattern is exactly traditional cellular communication pattern.
2. orthogonal resource shared model: D2D communication is divided resource equally with cellular communication, and the channel resource that independently takies half is directly communicated by letter end to end, and the phone user takies second half channel resource.Under this pattern, can not produce interference between D2D communication and the cellular communication.
3. a multiplexing phone user's resource: D2D user will with multiplexing its resource of phone user, can cause interference each other.And cellular basestation is D2D communication and cellular communication distribution through-put power size, coordinates interference each other.
D2D communication can be shared uplink resource or down-chain resource with cellular communication.No matter share for the shared still down link of up link, the mode of system's total data rate maximum can be selected to make in the base station from above three kinds of resource-sharing schemes.Because when up link or down link were shared, the source of interference and size were different, need consider different interference control methods at the base station end in the specific implementation.
Summary of the invention
The multiplexing phone user's of a pair of D2D user resource, or can produce very large disturbance (when both apart from each others) to the phone user of this proper communication, otherwise selection resource multiplex user's algorithm can be very complicated.And when selecting a plurality of phone users to carry out resource multiplex, general system of selection all is the index complexity.So the present invention proposes the method for a kind of D2D user based on customer location to the resource of selecting multiplexing a plurality of phone users.It is D2D user to the phone user's that selects a plurality of multiplexed resource algorithm complex that this method can reduce the base station end to a great extent, and can effectively suppress D2D user to and the phone user between interference.Basic principle of the present invention is: the base station positions by the user to its service, for D2D user carries out multiplexing to chosen distance a plurality of phone users' farthest resource.
What the present invention was primarily aimed at is in the cellular network, exists one or more D2D users that needs are communicated, and they finish communication by the resource of sharing in the cellular network.Set up departments the system in have N phone user U
1, U
2..., U
N, M is to D2D user (D
1, D
2), (D
3, D
4) ..., (D
2M-1, D
2M), if these users to the base station feedback channel information, carry out the resource allocation of D2D communication according to channel information below then,, then carry out the resource allocation of D2D communication by other method if user's channel information can't be known in the base station.Concrete steps of the present invention are:
Step 1: phone user and D2D user are to base station end feedback channel information.Also might have only the phone user to base station end feedback information, this is relevant with concrete system architecture.
Step 2: the base station by location algorithm determine D2D user to each phone user's position.Can be by global positioning system (GlobalPosition System, GPS) or common base station location algorithm position.And store these users' position.
Step 3: the base station is their Resources allocation according to the traditional dispatching algorithm of channel information employing of phone user's feedback earlier.The base station is the object of its phone user of K farthest of every pair of D2D user's chosen distance as its multiplexed resource then.
For the lighter network of load, promptly resource has remaining situation, and D2D user carries out transfer of data to distributing with the resource of phone user's quadrature.When Resources allocation, the base station is paid the utmost attention to the phone user distributes the most suitable their resource, be D2D user then between the resource be left of allocation of communications.Here it should be noted that: 1) disturb in order to suppress to greatest extent, if the resource that can set a phone user in practice by a D2D user to multiplexing, then it can not be by other D2D user to multiplexing, and promptly a phone user's resource at most can only be multiplexing by a pair of D2D user; 2) select multiplexed resource user's algorithm complex in order to reduce the base station end, can determine phone user's number of its multiplexed resource in advance according to D2D user's position, and then select these users according to positioning result.
Step 4: resource that the base station is distributed according to the phone user and D2D user be to the scheme of the shared resource selected, to D2D user to carrying out power division with the phone user.Use suitable power control scheme can further reduce D2D user to and the interference of supervision between the user.
Last D2D user communicates by letter to utilizing the resource that is assigned to finish with power respectively with the phone user.
The method of this multiplexing a plurality of phone user's resources of D2D user based on base station location can effectively reduce the complexity that the base station end is selected user's algorithm of shared resource, directly relatively gets final product according to positioning result; And this method can effectively reduce the interference of D2D communication to the phone user, should be disperseed by the bigger interference reduction that a phone user bears to be born jointly by a plurality of users, thereby improve overall system data rate and spectrum efficiency.
Description of drawings
In conjunction with the following drawings and instantiation will be convenient to understand principle of the present invention, step, characteristics and advantage to the detailed description done of invention, in the accompanying drawing:
Fig. 1 is an expression system model of the present invention.
Fig. 2 is the specific embodiments of expression the present invention in real network.
Embodiment
For ease of understanding, the present invention is an example with the D2D communication network under the LTE-A system, illustrates that the D2D technology is applied to cellular network, and the Cellular Networks user to definite shared resource for D2D user is come by the method for location in the base station.Supposing the system has the 10MHz bandwidth, works in 2GHz.Set up departments the system in 10 phone users are arranged, be respectively U
1, U
2..., U
10Two couples of D2D users are arranged, (D
1, D
2) and (D
3, D
4).Phone user's number here can be different with D2D user's logarithm.The present invention generally is suitable for for the network structure model that all have essential characteristic in this example.These D2D users can directly communicate under the coordination of base station, and D2D user is to the shared network resource of communicating by letter with macrocellular in when communication.
The base station end is that phone user and D2D user are as follows to the detailed process of determining resource-sharing pattern and resource allocation:
1. phone user and D2D user are to base station end feedback channel information.Also might have only the phone user to base station end feedback information, this is relevant with concrete system architecture.
The base station by location algorithm determine D2D user to each phone user's position.
3. the base station is their Resources allocation according to the traditional dispatching algorithm of channel information employing of phone user's feedback earlier.To be that every couple of D2D user selects a plurality of apart from its phone user farthest object as its multiplexed resource in the base station then, get K here
1=2, K
2=3.As shown in Figure 2, (D
1, D
2) selection user U
2, U
3And U
4, (D
3, D
4) selection user U
7And U
8Carry out resource multiplex.
4. the base station is according to phone user and the D2D user resource to distributing, to D2D user to carrying out power division with the phone user.
Last D2D user communicates by letter to utilizing the resource that is assigned to finish with power respectively with the phone user.
This shows that it is D2D user to the complexity of phone user's algorithm of selecting suitable multiplexed resource that this programme can effectively reduce the base station, and both are at a distance of effectively having controlled the interference that produces each other farthest.
Comprehensive above discussion can find out, the present invention proposes when the D2D technology is applied to cellular network, by the base station to the location of travelling carriage come for D2D user to selecting the multiplexing resource of a plurality of phone users, the present invention has following features:
1. the base station end is that D2D user is simple to the algorithm of selecting the multiplexed resource phone user, only needs afterwards distance more each other to get final product in the location.
2. the D2D user that this system of selection can the establishment multiplexed resource to and the phone user between interference, thereby improve the overall system data rate.
3. the method that proposes of the present invention is insensitive to concrete application system and protocol specification, possesses compatibility, and the method that namely all can utilize the present invention to propose to system like the model class in any therewith invention is carried out transfer of data and shared.
In a word, the present invention is a kind of data transmission technology of new high efficiency, its objective is the raising system spectral efficiency, reduces the complexity of resource multiplex algorithm when increasing the D2D communication reliability, thereby improves the overall performance of GSM.
Claims (8)
- With end-to-end (Device-to-Device, D2D) technology is applied to cellular network, the base station based on customer location tabulate for D2D user to distributing the phone user of a plurality of multiplexed resource.
- 2. based on the communication resources such as the network architecture, communication equipment, available launch power and communications band that comprise in the system, at the communication channel of dividing and making up and constitute by the difference of each communication resource, the D2D technology is applied in the cellular network and according to the base station to user's location come for D2D user to selecting the phone user of a plurality of multiplexed resource, can effectively reduce the base station end and select the complexity of multiplexed resource algorithm, and farthest suppress the interference between D2D user and the phone user for D2D user.In this scheme, based on the cellular network model that has D2D communication, according to communicate by letter multiplexing phone user's the principle of resource of D2D, the performing step of the scheme of setting is:Step 1: phone user and D2D user are to base station end feedback channel information.Also might have only the phone user to base station end feedback information, this is relevant with concrete system architecture.Step 2: the base station by location algorithm determine D2D user to each phone user's position.Can be by global positioning system (Global Position System, GPS) or common base station location algorithm position.And store these users' position.Step 3: the base station is their Resources allocation according to the traditional dispatching algorithm of channel information employing of phone user's feedback earlier.The base station is the object of its phone user of K farthest of every pair of D2D user's chosen distance as its multiplexed resource then.For the lighter network of load, promptly resource has remaining situation, and D2D user carries out transfer of data to distributing with the resource of phone user's quadrature.When Resources allocation, the base station is paid the utmost attention to the phone user distributes the most suitable their resource, be D2D user then between the resource be left of allocation of communications.Here it should be noted that: 1) disturb in order to suppress to greatest extent, if the resource that can set a phone user in practice by a D2D user to multiplexing, then it can not be by other D2D user to multiplexing, and promptly a phone user's resource at most can only be multiplexing by a pair of D2D user; 2) select multiplexed resource user's algorithm complex in order to reduce the base station end, can determine phone user's number of its multiplexed resource in advance according to D2D user's position, and then select these users according to positioning result.Step 4: resource that the base station is distributed according to the phone user and D2D user be to the scheme of the shared resource selected, to D2D user to carrying out power division with the phone user.Use suitable power control scheme can further reduce D2D user to and the interference of supervision between the user.Last D2D user communicates by letter to utilizing the resource that is assigned to finish with power respectively with the phone user.
- As the described phone user of step 1 in the claim 2 and D2D user to base station end feedback channel information.Comprise D2D user to quantity and the diverse ways of phone user to the base station feedback channel information.
- As the described base station of step 2 in the claim 2 by location algorithm location D2D user to each phone user's position.Comprise and be applied to the network architecture of the present invention and the localization method of the similar network architecture and the storage of relevant position data.Such as but not limited to: can be by global positioning system (Global Position System, GPS) or common base station location algorithm position.
- 5. be their Resources allocation according to the traditional dispatching algorithm of channel information employing of phone user's feedback earlier as the described base station of step 3 in the claim 2.To be that every couple of D2D user selects a plurality of apart from its phone user farthest object as its multiplexed resource in the base station then.The thought, algorithm and the step that comprise selection.
- 6. described promptly resource has remaining situation at the lighter network of load as step 3 in the claim 2, and D2D user carries out transfer of data to distributing with the resource of phone user's quadrature.When Resources allocation, the base station is paid the utmost attention to the phone user distributes the most suitable their resource, be D2D user then between the resource be left of allocation of communications.
- 7. select multiplexed resource user's algorithm complex as step 3 in the claim 2 is described in order to reduce the base station end, can determine phone user's number of its multiplexed resource in advance according to D2D user's position, and then select these users according to the result of location.
- As the described base station of step 4 in the claim 2 according to phone user's resource allocation be the resource multiplex scheme of D2D user to selecting, to D2D user to carrying out power division with the phone user.The thought, algorithm and the step that comprise the power division that is applied to the network architecture of the present invention and the similar network architecture.
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