CN103052111B - The system of selection of communication pattern between user under different base station - Google Patents

Abstract

The invention discloses the system of selection of communication pattern between user under different base station, by a series of information states such as the distances of base station collection communication equipment user, and then choose communication equipment adopt communication pattern under D2D communication pattern or base station collaboration by calculating.This kind of method takes full advantage of the characteristic that user under different base station is in cell edge, and combine the transmision peak that D2D communication promotes communication device user, the advantages such as less expense and time delay achieve the lifting of user performance in cellular network.Simultaneously this kind of strategy greatly reduces the signaling consumption between base station, has stronger practicality.

Description

The system of selection of communication pattern between user under different base station

Technical field

The present invention relates to communication technical field, be specifically related to the mode selecting method of telex network under different base station.

Background technology

Along with the development of broadband wireless communication technique, future wireless system increases day by day to two-forty, wide covering and jumbo demand.Communication in traditional cellular communication between communication user forwards by the cooperation of base station, and the message of communication is first sent to base station by the source namely communicated, and is then transmitted to the destination of communication by base station.Traditional cellular communication exists that resource consumption is large, efficiency of transmission is low, the load of base station problems such as heavily, the technology introduced by D2D communication pattern in cellular cell has been there is again for above-mentioned cellular communication Problems existing, once the channel of the source communicated and destination is better, carry out direct D2D communication will bring saving resource, and reduce interference and promote efficiency of transmission, alleviate the load of base station, obtaining the many-sides such as low time delay has huge advantage.In IMT-Advanced evolution, merge D2D technology simultaneously, significantly will improve network configuration, strengthen covering, improve power system capacity.

Communication at present under usual different base station between user also all adopts traditional cellular communication modes, therefore also just there are the problems that above-mentioned cellular communication modes is mentioned.Document is seldom had to consider to adopt D2D to communicate between user under different base station, more there are no the method selecting communication pattern according to the actual conditions of communication user.

Summary of the invention

For prior art Problems existing, the object of the present invention is to provide a kind of system of selection making limited Radio Resource obtain communication pattern between communication equipment under the different base station utilized efficiently.

For achieving the above object, the system of selection of communication pattern between user under different base station of the present invention, comprises the following steps: 1) the first communication equipment initiate to base station, place first will with the session request of the second communication devices communicating under the second adjacent base station; 2) the first base station sends to the second base station session request after receiving session request, and first, second base station is corresponding simultaneously obtains measurement report to first, second communication equipment transmission measurement request; 3) the first communication equipment sends index signal on the assigned resource to second communication equipment, thus obtains the channel quality of the first communication equipment and second communication equipment room; 4) the first base station is selected according to the communication pattern of channel quality to the first communication equipment and second communication equipment of measurement report and the first communication equipment and second communication equipment room.

Further, described measurement report comprises the channel quality between described first communication equipment and the first base station, the elements of a fix of described first communication equipment and the elements of a fix of described second communication equipment.

Further, the resource of distributing in step 3) is the orthogonal resource of the first communication equipment place honeycomb.

Further, the channel quality of described first communication equipment and second communication equipment room refers to small scale channel between the two.

Further, in step 4), the communication pattern of the first communication equipment and second communication equipment is selected to refer to the selection using D2D communication pattern or base station collaboration communication pattern between communication equipment.

Further, described D2D communication pattern refers to a kind of communication pattern to directly carrying out transfer of data between first, second communication equipment described under the control of different base station; Described base station collaboration communication pattern refers to that first the information of described first communication equipment send to described first base station, and secondly the first base station sends to described second base station, and the second last base station is transmitted to a kind of communication pattern of described second communication equipment.

In further step 4), the communication pattern selective rule of the first base station selected first communication equipment and second communication equipment is:

When meeting d≤d ₀time, the first communication equipment and second communication equipment adopt D2D communication pattern to communicate;

When meeting d>d ₀time, the communication pattern that the first communication equipment adopts different base station to cooperate with second communication equipment communicates; Wherein d is the distance of the first communication equipment and second communication equipment room, d ₀for the threshold limit value that communication pattern is selected.

Further, described threshold limit value d ₀computing formula be,

$d_0=\frac{R}{\frac{1}{2}+(\frac{P_C{\left|h_{\mathrm{CBS}}\right|}^2}{P_D{\left|h_{D_{\mathrm{Tx}}{D}_{\mathrm{Rx}}}\right|}^2}{)}^{1/a}}$

Wherein, R is the radius of cellular cell, P _cfor the maximum transmission power of phone user under base station collaboration communication pattern, P _dfor under D2D communication pattern, the maximum transmission power of described first communication equipment, a is the path loss factor with distance dependent, | h _cBS| ²be the channel quality between the first communication equipment and the first base station, it is the channel quality of the first communication equipment and second communication equipment room.

Under the present invention is directed to the network communicated between different base station lower limb user, selection strategy to D2D communication pattern is proposed, take full advantage of the characteristic of D2D communication, effectively improve user's satisfaction rate of network, ensure that telex network service quality, enhance throughput of system, make limited Radio Resource obtain efficient utilization, there is stronger practicality.

Accompanying drawing explanation

Fig. 1 is the signaling process figure realizing communication user request communication under different base station of the present invention;

Fig. 2 is the method for salary distribution and the scheduling of resource pattern of the intra-cell resource that the present invention relates to;

Fig. 3 is the relation of the spacing of throughput and communication user between communication user under D2D communication pattern and base station collaboration communication pattern;

Fig. 4 is the relation schematic diagram of throughput of system and D2D user's spacing under D2D communication pattern and base station collaboration communication pattern.

Embodiment

Under regard to a kind of system of selection being applicable to telex network pattern under different base station proposed by the invention, describe in detail in conjunction with the accompanying drawings and embodiments.

As illustrated in fig. 1 and 2, under different base station, the system of selection of telex network pattern comprises the following steps:

S1, communication equipment source initiate the session request that will communicate with the communication equipment destination under adjacent base station to base station, communication equipment source place;

By signaling, session request is sent to the base station at communication equipment destination place after S2, base station, communication equipment source place receive session request, simultaneously two base stations are corresponding respectively sends to communication equipment source and destination the request of measurement, thus base station, communication equipment source place can obtain the measurement reports such as communication equipment source coordinate, channel quality between communication equipment source and base station, place; Base station, communication equipment destination place can obtain communication equipment destination coordinate;

The resource that S3, communication equipment source are distributed to communication equipment destination in communication equipment source sends index signal, communication equipment destination issues base station, communication equipment destination place the signal received, index signal is fed back to base station, communication equipment source place by this base station again, due to the index signal intensity that base station, communication equipment source place known communication device source sends, again according to the index signal intensity of communication equipment destination place base station feedback, thus obtain the channel quality between communication equipment source and communication equipment destination; After the information such as mark, communication equipment destination coordinate, the channel quality between communication equipment source and base station, place and the channel quality between communication equipment source and communication equipment destination are sat up straight in obtaining communication equipment sources in S4, base station, communication equipment source place, communication pattern between communication equipment source and communication equipment destination is selected, finally determines between communication user, to adopt D2D communication pattern or base station collaboration communication pattern.

As follows for step S2 specific implementation method:

S21, communication equipment source send index signal to base station, communication equipment source place (eNB1), and base station, communication equipment source place (eNB1) draws the channel quality between communication equipment source and base station, communication equipment source place (eNB1) by the intensity receiving index signal;

For step S3: base station, communication equipment source place, by control channel notice communication equipment source, allows communication equipment source send index signal by the frequency range that base station, communication equipment source place is given; The index signal intensity of the base station receives communication equipment destination feedback at communication equipment destination place, then sent to the base station of communication equipment source by signaling, be beneficial to the base station of communication equipment source to calculate the channel quality between communication equipment source and communication equipment destination.

For step S4:

Base station, communication equipment source place calculates throughput under D2D communication pattern and different base station collaboration communication pattern according to the channel quality between the communication equipment source obtained and communication equipment destination, channel quality between communication equipment source and base station, place and communication equipment destination coordinate and communication equipment source coordinate, determine to select which kind of communication pattern, specific rules is as follows:

A) when meeting time, the notice communication of base station, communication equipment source place

Equipment source adopts D2D communication pattern directly to send the data to communication equipment destination.B) when meeting time, the notice communication of base station, communication equipment source place

Equipment source adopts base station collaboration communication pattern, namely communication equipment source sends to base station, place signal, then base station sends to the base station at communication equipment destination place by transfer of data, and finally its signal is transmitted to communication equipment destination, completes final transfer of data.

Wherein, R is the radius of cellular cell, P _cfor the maximum transmission power of phone user under base station collaboration communication pattern, P _dfor under D2D communication pattern, the maximum transmission power of communication equipment source, a is the path loss factor with distance dependent, | h _cBS| ²be the channel quality of the first communication equipment and described first base station, for the channel quality of described first communication equipment and second communication equipment, d is communication equipment source and communication equipment destination spacing.

It should be noted that, the invention is not restricted to the communication pattern selection strategy of the communication device user under different base station, it can expand in different heterogeneous network scenes, such as, if a communication equipment source is femto user, and communication equipment destination is Macro user, if the distance between them is very near, namely channel quality is fine, can adopt this strategy to select equally.Thus carry out D2D communication.

The system of selection being applicable to telex network pattern under different base station of the present invention, for the communication equipment being in different base station edge, as shown in Figures 3 and 4, distance between communication equipment is very near, when having good communication quality, if can set up the peak value that D2D communication can improve D2D communication effectively, throughput of system is larger, greatly reduces the load of signaling consumption under different base station and base station simultaneously.

As can be seen from the above embodiments, mainly for the scene that the distance of the communication device user being in edge simultaneously between them under different base station is very near.The present invention proposes based on this point the method that between communication equipment, communication pattern is selected under different base station just, the method is intended to by a series of information states such as the distances of base station collection communication equipment user, and then chooses communication equipment adopt communication pattern under D2D communication pattern or base station collaboration by calculating.This kind of method takes full advantage of the characteristic that user under different base station is in cell edge, and combine the transmision peak that D2D communication promotes communication device user, the advantages such as less expense and time delay achieve the lifting of user performance in cellular network.Simultaneously this kind of strategy greatly reduces the signaling consumption between base station, has stronger practicality.

Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (1)

1. the system of selection of communication pattern between user under different base station, is characterized in that, comprise the following steps: 1) the first communication equipment initiate to base station, place first will with the session request of the second communication devices communicating under the second adjacent base station; 2) the first base station sends to the second base station session request after receiving session request, and first, second base station is corresponding simultaneously obtains measurement report to first, second communication equipment transmission measurement request; 3) the first communication equipment sends index signal on the assigned resource to second communication equipment, thus obtains the channel quality of the first communication equipment and second communication equipment room; 4) the first base station is selected according to the communication pattern of channel quality to the first communication equipment and second communication equipment of measurement report and the first communication equipment and second communication equipment room;

Described measurement report comprises the channel quality between described first communication equipment and the first base station, the elements of a fix of described first communication equipment and the elements of a fix of described second communication equipment;

Step 3) in the resource of distributing be the orthogonal resource of the first communication equipment place honeycomb;

The channel quality of described first communication equipment and second communication equipment room refers to small scale channel between the two;

Step 4) in the communication pattern of the first communication equipment and second communication equipment select to refer to the selection using D2D communication pattern or base station collaboration communication pattern between communication equipment;

Described D2D communication pattern refers to a kind of communication pattern to directly carrying out transfer of data between first, second communication equipment described under the control of different base station; Described base station collaboration communication pattern refers to that first the information of described first communication equipment send to described first base station, and secondly the first base station sends to described second base station, and the second last base station is transmitted to a kind of communication pattern of described second communication equipment;

Step 4) in the communication pattern selective rule of the first base station selected first communication equipment and second communication equipment be:

When meeting d≤d ₀time, the first communication equipment and second communication equipment adopt D2D communication pattern to communicate;

When meeting d>d ₀time, the communication pattern that the first communication equipment adopts different base station to cooperate with second communication equipment communicates; Wherein d is the distance of the first communication equipment and second communication equipment room, d ₀for the threshold limit value that communication pattern is selected;

Described threshold limit value d ₀computing formula be,

$d_0=\frac{R}{\frac{1}{2}+{\left(\frac{P_C{\left|h_{\mathrm{CBS}}\right|}^2}{P_D{\left|h_{D_{\mathrm{Tx}}{D}_{\mathrm{Rx}}}\right|}^2}\right)}^{1/a}}$

Wherein, R is the radius of cellular cell, P _cfor the maximum transmission power of phone user under base station collaboration communication pattern, P _dfor under D2D communication pattern, the maximum transmission power of described first communication equipment, a is the path loss factor with distance dependent, | h _cBS| ²be the channel quality between the first communication equipment and the first base station, it is the channel quality of the first communication equipment and second communication equipment room.