Summary of the invention
In order to reduce complexity and the cost of UE, and improving communication performance, embodiments providing a kind of channel detection method, communication means, terminal and system.Described technical scheme is as follows:
On the one hand, provide a kind of channel detection method, described method comprises:
The first terminal that direct communication D2D between terminal with terminal communicates is initiated detection reference signal SRS and is measured request to base station, described SRS measures in request the mark of second terminal of carrying D2D communication;
Receive the notification message that described base station in response sends in the described request of measuring, in described notification message, carry the parameter information of the SRS signal that described second terminal sends;
Measure described SRS signal according to described parameter information, obtain the channel condition information of channel between described first terminal and described second terminal.
Wherein, described channel information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
On the other hand, provide a kind of method of carrying out communicating according to above-mentioned channel detection method, described method comprises:
The first terminal that direct communication D2D between terminal with terminal communicates is initiated detection reference signal SRS and is measured request to base station, described SRS measures in request the mark of second terminal of carrying D2D communication;
Receive the notification message that described base station in response sends in the described request of measuring, in described notification message, carry the parameter information of the SRS signal that described second terminal sends;
Measure described SRS signal according to described parameter information, obtain the channel condition information of channel between described first terminal and described second terminal;
When described channel condition information meets pre-conditioned, described first terminal communicates with described second terminal.
Wherein, described channel condition information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three, and before described first terminal communicates with described second terminal, described method also comprises:
Judge whether described SRS signal strength signal intensity is greater than default signal strength values, and/or whether described channel quality is greater than default channel quality value, and/or whether described channel response is greater than default channel response value;
When described SRS signal strength signal intensity is greater than default signal strength values, and/or described channel quality is greater than default channel quality value, and/or, when described channel response is greater than default channel response value, judge that described channel condition information meets pre-conditioned.
Wherein, before the first terminal that described D2D communicates initiates SRS measurement request to base station, described method also comprises:
Described first terminal receives the first notification message that described second terminal sends, and described first notification message carries the information that described second terminal has cooperative communication ability;
Described first terminal carries out communicating with described second terminal and specifically comprises: described first terminal notifies that described second terminal is cooperated and communicates, and starts to cooperate with described second terminal to communicate.
Another aspect, provides a kind of channel detection method, and described method comprises:
The detection reference signal SRS that the first terminal that direct communication D2D between receiving terminal with terminal communicates is initiated measures request, and described SRS measures in request the mark of second terminal of carrying D2D communication;
According to the mark of described second terminal, obtain the parameter information of the SRS signal that described second terminal sends;
Sending the notification message for measuring described SRS signal to described first terminal, in described notification message, carrying the parameter information of the SRS signal that described second terminal sends.
Wherein, the described mark according to described second terminal, obtains the parameter information of the SRS signal that described second terminal sends, comprising:
Be designated described second terminal distribution SRS signal according to described second terminal, indicate described second terminal to send SRS signal;
Obtain the parameter information of the SRS signal that described second terminal sends.
Wherein, described channel condition information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
Another aspect, provides a kind of communication terminal based on D2D, and described communication terminal comprises:
Sending module, measure request for initiating detection reference signal SRS to base station, described SRS measures in request the mark of another terminal of carrying D2D communication;
Receiver module, for receiving the notification message that base station in response sends in the described request of measuring, carries the parameter information of the SRS signal that another terminal described sends in described notification message;
Measurement module, the described parameter information for receiving according to described receiver module measures described SRS signal, obtains the channel condition information of channel between described communication terminal and another terminal described;
Communication module, for when described channel condition information meets pre-conditioned, described communication terminal communicates with another terminal described.
Wherein, described communication module comprises judging unit and communication unit;
Described judging unit, for judging whether described SRS signal strength signal intensity is greater than default signal strength values, and/or whether described channel quality is greater than default channel quality value, and/or whether described channel response is greater than default channel response value;
Described communication unit, for being greater than default signal strength values when described SRS signal strength signal intensity, and/or, described channel quality is greater than default channel quality value, and/or when described channel response is greater than default channel response value, described first terminal communicates with another terminal described.
Wherein, described communication terminal is also for receiving the first notification message that another terminal described sends, and described first notification message carries the information that another terminal described has cooperative communication ability;
Correspondingly, described communication module comprises judging unit and communication unit;
Described judging unit, for judging whether described SRS signal strength signal intensity is greater than default signal strength values, and/or whether described channel quality is greater than default channel quality value, and/or whether described channel response is greater than default channel response value;
Described communication unit, for being greater than default signal strength values when described SRS signal strength signal intensity, and/or, described channel quality is greater than default channel quality value, and/or, when described channel response is greater than default channel response value, described first terminal notice another terminal described is cooperated communication, and beginning is cooperated with another terminal described and communicated.
Wherein, described channel condition information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
Another aspect, provides a kind of communication system, and described system comprises:
Described first terminal, request is measured for initiating detection reference signal SRS to described base station, described SRS measures in request the mark of second terminal of carrying D2D communication, receive the notification message that described base station in response sends in the described request of measuring, the parameter information of the SRS signal that described second terminal sends is carried in described notification message, measure described SRS signal according to described parameter information, obtain the channel condition information of channel between described second terminal; When described channel condition information meets pre-conditioned, communicate with described second terminal;
Described base station, the SRS initiated for receiving described first terminal measures request, the parameter information of the SRS signal that described second terminal sends is obtained according to the mark of described second terminal, and send the notification message for measuring described SRS signal to described first terminal, carry the parameter information of the SRS signal that described second terminal sends in described notification message;
Described second terminal, for sending SRS signal.
Another aspect, provides a kind of base station, and described base station comprises:
Receiver module, for the detection reference signal SRS measurement request of the first terminal initiation that the direct communication D2D between receiving terminal with terminal communicates, described SRS measures the mark of carrying the second terminal that D2D communicates in request;
Acquisition module, for the mark of described second terminal received according to described receiver module, obtains the parameter information of the SRS signal that described second terminal sends;
Sending module, for sending the notification message for measuring described SRS signal to described first terminal, carries the parameter information of the SRS signal that described second terminal sends in described notification message.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By adopting LTE(Long Term Evolution, Long Term Evolution) existing SRS signal carries out channel detection in cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the communication of D2D communication and LTE cellular system, improve D2D communication quality.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
LTE cellular communication shown in Figure 1 and D2D communication scheme, in LTE cellular network system, need during two terminal communications to forward through base station, same packet from terminal to base station, then from base station to terminal, takies interface-free resources twice.If two communication terminals are distant, cannot arrive the other side, then this project plan comparison is feasible; If but communicating pair close together, mutually in the communication range of the other side, then packet is directly transmitted by terminal, does not need to forward through base station, can save the resource of half.Packet in D2D communication directly by terminal transmission without any need for the infrastructure of centre, beep-page message directly sends to paged terminal from call terminal, and not needing the help of base station and core net, this communication mode can bring huge interests to cellular network communication.
Embodiment 1
See Fig. 2, embodiments provide a kind of channel detection method, the method comprises:
101: the first terminal that the direct communication D2D between terminal with terminal communicates is initiated detection reference signal SRS and measured request to base station, this SRS measures in request the mark of second terminal of carrying D2D communication;
102: receive the notification message that base station in response sends in the request of measurement, carry the parameter information of the SRS signal that the second terminal sends in this notification message;
103: measure SRS signal according to parameter information, obtain the channel condition information of channel between first terminal and the second terminal.
Wherein, channel condition information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
The method that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the communication of D2D communication and LTE cellular system, improve D2D communication quality further.
Embodiment 2
See Fig. 3, the present embodiment describes the SRS that each D2D UE sends by measuring other D2D UE in detail, and obtain the channel condition information between two UE, then determine method and the step of D2D messaging parameter according to channel condition information, this communication means comprises:
201:D2D_UE1 with D2D_UE2 prepare carry out D2D communicate or carrying out D2D communication need to carry out channel detection;
Particularly, the first communication terminal D2D_UE1 in the embodiment of the present invention and second communication terminal D 2D_UE2 is in D2D communication system, the communications status of two communication terminals can carry out D2D communication for preparation, determine whether to communicate by channel detection, select the communication resource, resources configuration optimization, power division, the functions such as adaptive coding and modulating; Also for carry out D2D communication, the communication resource can be selected by channel detection, resources configuration optimization, power division, the functions such as adaptive coding and modulating.
202:D2D_UE1 initiates SRS to base station eNB and measures request;
Wherein, the SRS of this initiation measures request, for informing base station for measuring the SRS signal of D2D_UE2.Particularly, this SRS measures the terminal iidentification carrying D2D_UE2 in request, obtains the parameter information of the SRS signal that D2D_UE2 sends to make base station according to the terminal iidentification of this D2D_UE2.
203: base station is according to the measurement request of D2D_UE1, and instruction D2D_UE2 sends SRS signal;
Particularly, after base station receives the measurement request of D2D_UE1 transmission, according to the terminal iidentification carried in the request of measuring, the terminal indicating this terminal iidentification corresponding sends SRS signal.
In practical application, this step is can selection operation, when base station receive SRS that D2D_UE1 initiates measure request time, possible D2D_UE2 is sending SRS signal, now base station need not indicate new SRS to send, and just tells D2D_UE1 by the parameter information of the SRS signal of D2D_UE2.
204:D2D_UE2 sends SRS signal according to the instruction of base station;
Wherein, after D2D_UE2 receives the instruction of base station transmission, send SRS signal to D2D_UE1, this SRS signal is the detection reference signal in LTE cellular system, and it carries out ascending channel detecting for eNB in LTE system, eNB is enable to determine uplink channel status information, to realize priority scheduling of resource, select the communication resource, resources configuration optimization, power controls, the functions such as adaptive coding and modulating.
205: base station notice D2D_UE1 measures the SRS signal that D2D_UE2 sends;
Particularly, base station obtains the parameter information of the SRS signal that D2D_UE2 sends, and sends a notification message to D2D_UE1, carries the parameter information of the SRS signal that D2D_UE2 sends in this notification message, this parameter information can be the running time-frequency resource of SRS signal, SRS series styles etc.
206:D2D_UE1 receives the SRS signal that D2D_UE2 sends, and measures this SRS signal according to the notification message that base station sends, and obtains channel condition information;
Wherein, channel condition information specifically comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
Particularly, owing to carrying the parameter information of the SRS signal that D2D_UE2 sends in notification message, thus D2D_UE1 carries out Measurement accuracy according to this parameter information to this SRS signal, obtain the channel condition information of channel between D2D_UE1 and D2D_UE2, improve the accuracy rate of measure channel state information.
207:D2D_UE1 determines whether to communicate with D2D_UE2 according to channel condition information.
For this step, D2D_UE1 judges whether the channel condition information obtained meets pre-conditioned, when judging to meet pre-conditioned, then determines and to communicate with D2D_UE2.Wherein, the channel condition information obtained specifically comprises SRS signal strength signal intensity, at least one in channel quality and channel response three, D2D_UE1 judges whether the channel condition information obtained meets pre-conditioned, be specially, judge whether the SRS signal strength signal intensity obtained is greater than default signal strength values, and/or, whether the channel quality obtained is greater than default channel quality value, and/or, whether the channel response obtained is greater than default channel response value, when the SRS signal strength signal intensity obtained is greater than default signal strength values, and/or, the channel quality obtained is greater than default channel quality value, and/or, when the channel response obtained is greater than default channel response value, judge to meet pre-conditioned, determine and carry out D2D_UE2 and communicate, and realize selecting the communication resource according to channel condition information, resources configuration optimization, power controls, the functions such as adaptive coding and modulating.
The method that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the communication of D2D communication and LTE cellular system, improve D2D communication quality.
Embodiment 3
See Fig. 4, the embodiment of the present invention describes the SRS that each D2D UE sends by measuring other D2D UE in detail, obtain the measurement channel information between two UE, then according to method and the step of the D2D UE of channel condition information determination cooperative communication, this communication means comprises:
301: each D2D_UE2 with cooperative communication ability notifies surrounding D2D_UE1, and it has this ability;
For this step, D2D_UE1 receives the first notification message that D2D_UE2 sends, and this first notification message carries the information that D2D_UE2 has cooperative communication ability.
302:D2D_UE1 initiates SRS and measures request to base station;
Wherein, D2D_UE1 knows that D2D_UE2 has cooperative communication ability, during for seeking cooperation with this D2D_UE2, initiating SRS measure request to base station.Particularly, this SRS measures the terminal iidentification carrying D2D_UE2 in request, and to make base station obtain the parameter information of the SRS signal that D2D_UE2 sends according to the terminal iidentification of this D2D_UE2, this parameter information can be the running time-frequency resource of SRS signal, SRS series styles etc.
303: base station is according to the measurement request of D2D_UE1, and instruction D2D_UE2 sends SRS signal;
Particularly, after base station receives the measurement request of D2D_UE1 transmission, according to the terminal iidentification carried in the request of measuring, the terminal indicating this terminal iidentification corresponding sends SRS signal.
In practical application, this step is can selection operation, when base station receive SRS that D2D_UE1 initiates measure request time, possible D2D_UE2 is sending SRS signal, now base station need not indicate new SRS to send, and just tells D2D_UE1 by the SRS signal parameter information of D2D_UE2.
304:D2D_UE2 sends SRS signal according to the instruction of base station;
Wherein, after D2D_UE2 receives the instruction of base station transmission, send SRS signal to D2D_UE1, this SRS signal is the detection reference signal in LTE cellular system, and it carries out ascending channel detecting for eNB in LTE system, eNB is enable to determine uplink channel status information, to realize priority scheduling of resource, select the communication resource, resources configuration optimization, power controls, the functions such as adaptive coding and modulating.
305: base station notice D2D_UE1 measures the SRS signal that D2D_UE2 sends;
Particularly, base station obtains the parameter information of the SRS signal that D2D_UE2 sends, and sends a notification message to D2D_UE1, carries the parameter information of the SRS signal that D2D_UE2 sends in this notification message, this parameter information can be the running time-frequency resource of SRS signal, SRS series styles etc.
306:D2D_UE1 receives the SRS signal that D2D_UE2 sends, and measures this SRS signal according to the notification message that base station sends, and obtains channel condition information;
Wherein, channel condition information specifically comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
Particularly, owing to carrying the parameter information of the SRS signal that D2D_UE2 sends in notification message, thus D2D_UE1 carries out Measurement accuracy according to this parameter information to this SRS signal, obtain the channel condition information of channel between D2D_UE1 and D2D_UE2, improve the accuracy rate of measure channel state information.
307:D2D_UE1 determines whether to cooperate with D2D_UE2 to communicate according to channel condition information.
For this step, D2D_UE1 judges whether the channel condition information obtained meets pre-conditioned, when judging to meet pre-conditioned, then notifies that D2D_UE2 cooperates communication.Wherein, the channel condition information obtained specifically comprises SRS signal strength signal intensity, at least one in channel quality and channel response three, D2D_UE1 judges whether the channel condition information obtained meets pre-conditioned, be specially, judge whether the SRS signal strength signal intensity obtained is greater than default signal strength values, and/or, whether the channel quality obtained is greater than default channel quality value, and/or, whether the channel response obtained is greater than default channel response value, when the SRS signal strength signal intensity obtained is greater than default signal strength values, and/or, the channel quality obtained is greater than default channel quality value, and/or, when the channel response obtained is greater than default channel response value, judge to meet pre-conditioned, then notify that D2D_UE2 cooperates communication, and start to cooperate with the second terminal to communicate.
The method that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the cooperative communication of D2D communication and LTE cellular system, improve D2D communication quality.
Embodiment 4
See Fig. 5, embodiments provide a kind of channel detection method, described method comprises:
401: the SRS that the first terminal receiving D2D communication is initiated measures request, this SRS measures in request the mark of second terminal of carrying D2D communication;
402: according to the mark of the second terminal, obtain the parameter information of the SRS signal that the second terminal sends;
403: send the notification message for measuring described SRS signal to first terminal, carry the parameter information of the SRS signal that the second terminal sends in this notification message.
Wherein, channel condition information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
The method that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, furthermore achieved that United Dispatching and the communication of D2D communication and LTE cellular system, improve D2D communication quality.
Embodiment 5
See Fig. 6, embodiments provide a kind of communication terminal based on D2D, described communication terminal comprises:
Sending module 501, measure request for initiating SRS to base station, this SRS measures in request the mark of another terminal of carrying D2D communication;
Receiver module 502, for receiving the notification message that base station in response sends in the request of measurement, carries the parameter information of the SRS signal that another terminal sends in this notification message;
Measurement module 503, measures SRS signal for the parameter information received according to receiver module 502, obtains the channel condition information of channel between communication terminal and another terminal;
Communication module 504, for when this channel condition information meets pre-conditioned, communication terminal communicates with another terminal.
Wherein, this communication terminal and another terminal prepare to carry out D2D and communicate, or, carry out D2D communication and need channel detection.
Particularly, communication module 504 comprises judging unit and communication unit;
Judging unit, for judging whether SRS signal strength signal intensity is greater than default signal strength values, and/or whether channel quality is greater than default channel quality value, and/or whether channel response is greater than default channel response value;
Communication unit, for being greater than default signal strength values when SRS signal strength signal intensity, and/or channel quality is greater than default channel quality value, and/or when channel response is greater than default channel response value, first terminal communicates with another terminal.
Particularly, communication terminal is also for receiving the first notification message that another terminal sends, and the first notification message carries the information that another terminal has cooperative communication ability;
Correspondingly, communication module 504 comprises judging unit and communication unit;
Judging unit, for judging whether SRS signal strength signal intensity is greater than default signal strength values, and/or whether channel quality is greater than default channel quality value, and/or whether channel response is greater than default channel response value;
Communication unit, for being greater than default signal strength values when SRS signal strength signal intensity, and/or, channel quality is greater than default channel quality value, and/or, when channel response is greater than default channel response value, first terminal notifies that another terminal is cooperated communication, and starts to cooperate with another terminal to communicate.
Wherein, channel condition information comprises at least one in SRS signal strength signal intensity, channel quality and channel response three.
It should be noted that: the communication means that above-described embodiment provides is when communicating, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by communication terminal is divided into different functional modules, to complete all or part of function described above.In addition, the communication terminal that above-described embodiment provides and communication means embodiment belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The terminal that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the cooperative communication of D2D communication and LTE cellular system, improve D2D communication quality.
Embodiment 6
See Fig. 7, embodiments provide a kind of communication system, described system comprises: the second terminal 603 that first terminal 601, base station 602 based on D2D communication communicate with based on D2D;
First terminal 601, request is measured for initiating detection reference signal SRS to base station 602, this SRS measures in request the mark of second terminal of carrying D2D communication, receive the notification message that base station in response sends in the request of measurement, the parameter information of the SRS signal that the second terminal sends is carried in this notification message, measure SRS signal according to parameter information, obtain the channel condition information of channel between the second terminal; When channel condition information meets pre-conditioned, communicate with the second terminal;
Base station 602, the SRS initiated for receiving first terminal 601 measures request, the parameter information of the SRS signal that the second terminal sends is obtained according to the mark of the second terminal, and send the notification message for measuring SRS signal to first terminal, carry the parameter information of the SRS signal that the second terminal sends in this notification message;
Second terminal 603, for sending SRS signal.
Wherein, first terminal can be arbitrary communication terminal that above-described embodiment 5 is recorded, and the present invention does not limit first terminal.
The system that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the cooperative communication of D2D communication and LTE cellular system, improve D2D communication quality.
Embodiment 7
See Fig. 8, embodiments provide a kind of base station, described base station comprises:
Receiver module 701, the SRS that the first terminal for receiving D2D communication is initiated measures request, and this SRS measures in request the mark of second terminal of carrying D2D communication;
Acquisition module 702, for the mark of the second terminal received according to receiver module 701, obtains the parameter information of the SRS signal that the second terminal sends;
Sending module 703, for sending the notification message for measuring this SRS signal to first terminal, carries the parameter information of the SRS signal that the second terminal sends in this notification message.
The base station that the embodiment of the present invention provides, channel detection is carried out by adopting existing SRS signal in LTE cellular system, complexity and the cost of UE can not be increased, can be good at realizing the compatibility with LTE cellular system, achieve United Dispatching and the cooperative communication of D2D communication and LTE cellular system, improve D2D communication quality.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.