CN103684534A - Terminal-to-terminal communication method, terminal equipment, communication method and communication device - Google Patents
Terminal-to-terminal communication method, terminal equipment, communication method and communication device Download PDFInfo
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- CN103684534A CN103684534A CN201210348335.3A CN201210348335A CN103684534A CN 103684534 A CN103684534 A CN 103684534A CN 201210348335 A CN201210348335 A CN 201210348335A CN 103684534 A CN103684534 A CN 103684534A
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Abstract
The invention provides a terminal-to-terminal communication method, terminal equipment using the communication method, a communication method and a communication device. The terminal-to-terminal communication method comprises the following steps: when a second terminal implements the terminal-to-terminal communication with a first terminal, the first terminal receives a signal message for estimating a channel state between the first terminal and the second terminal, wherein the signal message includes a reference signal for estimating the channel state; the first terminal estimates the channel state based on the reference signal, and obtains a channel state message; the first terminal sends the channel state message to control equipment; the control equipment determines if the channel state message satisfies predetermined conditions, and controls the first terminal and the second terminal to implement the terminal-to-terminal communication when the predetermined conditions are satisfied; the first terminal implements the terminal-to-terminal communication with the second terminal according to the control of the control equipment.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to a kind of communication means end to end, the terminal equipment that uses this communication means, communication means and communicator.
Background technology
Along with the development of the communication technology, various terminal equipments have been there are, such as notebook, intelligent communications terminal and personal digital assistant etc.These terminal equipments not only can carry out telecommunication via base station and other terminal equipment, and can also carry out junction service end to end when a plurality of terminal equipments are adjacent to one another.Described telecommunication technique is such as comprising the second generation (2G) mobile communication technology, the third generation (3G) mobile communication technology, Long Term Evolution (LTE) communication technology etc.Described short-range communication technology for example comprises near-field communication (NFC, Near Field Communication) technology, bluetooth (Bluetooth) communication technology etc.
The end-to-end communication that short-range communication technology is not normally directly carried out via third party between two terminal equipments.Because junction service has the advantages such as communication distance is short, communication establishment speed is fast, transmission speed is fast, low in energy consumption, fail safe is high, so the terminal equipment of near distance preferably transmits the data such as file, video, picture, music by short-range communication technology.In addition, the use of junction service also can be alleviated the problem of existing communication spectrum resource anxiety.
In existing short-range communication technology, when a terminal equipment will carry out end-to-end communication, conventionally this terminal equipment directly and another terminal equipment set up short range communications link, and directly carry out afterwards end-to-end communication in foundation.Yet when communication environment worsens or produce external interference, existing end-to-end communication mechanism may cause the loss of data or the error rate to increase.Particularly, when existing a plurality of adjacent terminal equipments to intercom mutually, loss or the error rate that interference each other may aggravate data increase.
Therefore, expectation can between terminal equipment, realize reliably, efficient end-to-end communication.
Summary of the invention
The embodiment of the present invention provides a kind of communication means end to end, has used the terminal equipment of this communication means, and it can realize reliably between terminal equipment, efficient end-to-end communication.
The embodiment of the present invention also provides a kind of communication means and communicator, and it has obtained the channel condition information between two terminal equipments, and communicates based on this channel condition information, thereby allows to improve communication efficiency when guaranteeing communication reliability.
On the one hand, a kind of communication means is end to end provided, be applied to first terminal, this communication means comprises: the second terminal to carry out and this first terminal between end-to-end communication time, this first terminal receives and signal message for estimating that channel status between described first terminal and described the second terminal is relevant, and this signal message comprises for estimating the reference signal of described channel status; Described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, and obtains the channel condition information between described first terminal and described the second terminal; Described first terminal is sent to control appliance by this channel condition information, it is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication; Described first terminal according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.
In the situation that described first terminal and described the second terminal can communicate with base station, described first terminal receive with for estimating that the step of the signal message that channel status between first terminal and the second terminal is relevant can comprise: from described base station reception reference signal configuration information; With based on described reference signal configuration information, from described the second terminal, receive reference signal, this reference signal is that the control of described the second terminal based on described base station sends.Now, can under the control of base station, estimate the channel condition information between terminal, make to utilize telecommunication mechanism to carry out junction service.
Described control appliance can be described base station, described first terminal is sent to described base station by this channel condition information, described base station described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication.Like this, can under the control of base station, carry out reliable, efficient end-to-end communication,
The described step that this channel condition information is sent to base station can comprise: described first terminal is encapsulated in described channel condition information from the ascending control information of terminal to base station, and described ascending control information is sent to described base station.The described step that receives reference signal configuration information from described base station comprises: described first terminal receives the Downlink Control Information from base station to terminal from described base station, and from described Downlink Control Information, extracts described reference signal configuration information.
Described control appliance is controlled described first terminal and described the second terminal based on described channel condition information and is carried out end-to-end communication and can comprise: based on channel condition information, control described first terminal and with different communication modes, carry out end-to-end communication from described the second terminal, this communication mode comprises one or more in transmission mode, transmission method, modulation coding mode.Like this, in the time of can be according to bad channel conditions between terminal, can realize reliable end-to-end communication by modulating-coding.
At described channel condition information, do not meet describedly when pre-conditioned, if described first terminal and described the second terminal can communicate with base station, described first terminal and described the second terminal can communicate via described base station.That is to say, while being difficult to carry out end-to-end communication, via base station, transmit data between terminal.
On the other hand, provide a kind of communication means, be applied to first terminal, the method comprises: described first terminal receives reference signal configuration information from base station; Described first terminal receives reference signal based on described reference signal configuration information from the second terminal, and this reference signal is that the control of described the second terminal based on base station sends; Described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, obtains the channel condition information between described first terminal and described the second terminal; With based on this channel condition information, communicate.
Described method also can comprise: described first terminal is sent to described base station by described channel condition information; From described base station, receive the first control information, this first control information is that described base station produces based on described channel condition information, and described base station sends the second control information to described the second terminal; And described first terminal and described the second terminal are carried out end-to-end communication according to described the first control information and described the second control information.Like this, under the control of base station, realized the end-to-end communication between terminal.
Alternatively, described first terminal is sent to described the second terminal by described channel condition information; From the second terminal, receive command information; With according to described command information and described the second terminal, carry out end-to-end communication.
On the other hand, a kind of terminal equipment is provided, carry out end-to-end communication with another terminal equipment, this terminal equipment comprises: receiving element, for described another terminal equipment to carry out and this terminal equipment between end-to-end communication time, receive and signal message for estimating that channel status between described terminal equipment and described another terminal equipment is relevant, this signal message comprises for estimating the reference signal of described channel status; Estimation unit, for estimate the channel status between described terminal equipment and described another terminal equipment based on described reference signal, and obtains the channel condition information between described terminal equipment and described another terminal equipment; Transmitting element, for this channel condition information is sent to control appliance, it is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described terminal equipment and described another terminal equipment carries out end-to-end communication; Short-range communication unit, for according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.
On the other hand, a kind of communicator is provided, be applied to terminal equipment, this communicator comprises: receiving element, for receive reference signal configuration information from base station, and from another terminal equipment, receiving reference signal based on described reference signal configuration information, the reference signal configuration information that described another terminal equipment of this reference signal receives from base station based on this another terminal equipment sends; Estimation unit, for estimating the channel status between described terminal equipment and described another terminal equipment based on described reference signal, obtains the channel condition information between described terminal equipment and described another terminal equipment; And communication unit, for communicating based on described channel condition information.
At the above-mentioned communication means end to end of the embodiment of the present invention and use in the technical scheme of terminal equipment of this communication means, by first estimated the channel status between terminal before carrying out end-to-end communication between terminal, and the channel condition information based on obtaining by estimation carries out end-to-end communication, thereby can between terminal equipment, realize reliable, end-to-end communication efficiently.
In the above-mentioned communication means of the embodiment of the present invention and the technical scheme of communicator, by channel estimating, obtained the channel condition information between two terminal equipments, and communicate based on this channel condition information, thereby allow to improve communication efficiency when guaranteeing communication reliability.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 has been indicative icon according to the flow chart of the communication means end to end of the embodiment of the present invention;
Fig. 2 illustrates according to the reception signal message in the end-to-end communication method of the embodiment of the present invention to estimate the schematic diagram of channel condition information;
Fig. 3 has been indicative icon according to the flow chart of the communication means of the embodiment of the present invention;
Fig. 4 has been indicative icon according to the flow chart of the first illustrative methods communicating based on this channel condition information in the communication means of the embodiment of the present invention;
Fig. 5 has been indicative icon according to the flow chart of the second illustrative methods communicating based on this channel condition information in the communication means of the embodiment of the present invention;
Fig. 6 has been indicative icon according to the block diagram of the terminal equipment of the embodiment of the present invention;
Fig. 7 has been indicative icon according to the block diagram of the communicator of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.
Terminal equipment in the embodiment of the present invention can be mobile terminal, for example mobile phone and notebook, can also be portable, pocket, hand-hold type, mobile device built-in computer or vehicle-mounted, they and wireless access network switched voice and/or data.Base station in the embodiment of the present invention can be the base station (BTS in global mobile communication (GSM) or code division multiple access (CDMA), Base Transceiver Station), also can be the base station (NodeB) in Wideband Code Division Multiple Access (WCDMA) (WCDMA), it can also be the evolved base station (eNB or e-NodeB, evolutional Node B) in Long Term Evolution (LTE) communication system.In embodiments of the present invention, the evolved base station of take in LTE communication system describes as example, but the embodiment of the present invention is not limited to this.
In embodiments of the present invention, can comprise two or more terminal equipments.Between these terminal equipments, can carry out man-to-man end-to-end communication, can also carry out many-one, one-to-many, the end-to-end communication of multi-to-multi even.For convenience of description, the embodiment of the present invention has only been described the end-to-end communication from a terminal equipment to another terminal equipment, and the end-to-end communication of many-one, one-to-many and multi-to-multi can be expanded on this basis.
Fig. 1 has been indicative icon according to the flow chart of the communication means end to end 100 of the embodiment of the present invention.Here, second terminal of take starts with the end-to-end communication of first terminal as example describes, and can carry out similarly first terminal startup and end-to-end communication the second terminal.
This end to end communication means 100 be applied to the first terminal of all terminal equipments described above and so on, this communication means 100 comprises: the second terminal to carry out and this first terminal between end-to-end communication time, this first terminal receives and signal message for estimating that channel status between described first terminal and described the second terminal is relevant, and this signal message comprises the reference signal (S110) for estimating described channel status; Described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, and obtains the channel condition information (S120) between described first terminal and described the second terminal; Described first terminal is sent to control appliance by this channel condition information, it is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication (S130); Described first terminal according to the control of described control appliance, carry out and described the second terminal between end-to-end communication (S140).
In S110, the second terminal to carry out and this first terminal between end-to-end communication time, this first terminal receives and signal message for estimating that channel status between described first terminal and described the second terminal is relevant, and this signal message comprises for estimating the reference signal of described channel status.Described reference signal is such as the signal that can be the forms such as detection reference signal (sounding reference signal), public reference signal (Common reference signal) or DRS (Dedicated Reference Signal) (Special reference signal).
Can carry out conventionally thering is icon or the button corresponding with corresponding end-to-end communication function in the terminal (such as the second terminal) of end-to-end communication, for example bluetooth icon or NFC button.User can indicate the end-to-end communication function (junction service function) that opens or closes this first terminal by clicking or press corresponding button or icon.As example, the button that the user of this second terminal operation is corresponding with junction service or the moment of icon, be the second terminal to carry out and this first terminal between moment of end-to-end communication.
This first terminal receives and signal message for estimating that channel status between described first terminal and described the second terminal is relevant, and this signal message comprises for estimating the reference signal of described channel status.Based on described reference signal, can know the channel status between described first terminal and described the second terminal.The reception of two kinds of signal messages under different channels estimation mode is described below.
As the first channel estimating mode, between first terminal and the second terminal, make an appointment for carrying out the reference signal of channel measurement, comprise the information such as frequency, power of this reference signal, the terminal that receives this reference signal is estimated channel status.Now, the signal message that this first terminal receives is that described the second terminal is according to the reference signal of making an appointment and sending.
As the second channel estimating mode, two terminals transmit or receive reference signal according to the control of base station, and estimate channel status by receiving the terminal of this reference signal.As previously mentioned, terminal equipment can communicate with base station conventionally, to transmit voice and/or data via base station to other terminal equipment.For example, first terminal can communicate via evolved base station and the second terminal.In the case, first terminal can under the assistance of base station, obtain and the second terminal between channel condition information.Below in conjunction with Fig. 2, be described.
Fig. 2 illustrates according to the reception signal message in the end-to-end communication method of the embodiment of the present invention to estimate the schematic diagram of channel condition information.First terminal T1 in Fig. 2 and the second terminal T2 can communicate with base station BS, and the step that described first terminal T1 receives described signal message can comprise: from described base station BS, receive reference signal configuration information (S210); With based on described reference signal configuration information, from described the second terminal, receive reference signal, this reference signal is (S220) that the control of described the second terminal based on described base station sends.Base station, except sending reference signal configuration information (S210) to described first terminal, also sends reference signal configuration information (as shown in the dotted line in Fig. 2) to the second terminal.This reference signal configuration information comprises for the running time-frequency resource of sending and receiving reference signal, the information such as power of reference signal, can also comprise as required other information.This reference signal configuration information can be for different terminals and different control informations, also can be the control information of all terminals to be controlled, in the latter's situation, the terminal that receives described reference signal configuration information need to be selected the control information for it from described reference signal configuration information.In S220, the second terminal sends reference signal according to reference signal configuration information, and first terminal receives described reference signal according to described reference signal configuration information.Then, the first terminal that receives this reference signal can be estimated the channel status between described first terminal and described the second terminal, and obtains the channel condition information between described first terminal and described the second terminal.
In S120, described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, and obtains the channel condition information between described first terminal and described the second terminal.After first terminal receives described reference signal in S110, can estimate the channel status between first terminal and the second terminal by analyzing the reference signal receiving, and obtain described channel condition information.
As example, described channel condition information can comprise one or more in following parameter: order indication (RI, rank indication) information, pre-coding matrix indication (PMI, pre-coding matrix indication) information, signal to noise ratio (SNR, signal to noise ratio) and channel quality information (CQI, channel quality information).Be noted that channel condition information described herein is only schematically, can also take other channel condition information as required.In addition, in concrete practice, can select suitable channel condition information according to the configuration of the end-to-end communication function of first terminal and the second terminal etc., in the situation that selecting two or more channel condition informations, selected each channel condition information can also be weighted.This channel condition information can obtain based on described reference signal with various channel estimation methods existing or that occur in the future, and concrete channel estimation methods is not construed as limiting the invention.
In S130, described first terminal is sent to control appliance by this channel condition information.It is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication.
Described control appliance is that it can be for example the second terminal or base station for controlling the equipment of the end-to-end communication between first terminal and the second terminal.As example, described control appliance can be the described base station that can communicate with first terminal and the second terminal, now, described first terminal is sent to described base station by channel condition information, described base station described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication.When described control appliance is the second terminal, whether channel condition information meets described pre-conditionedly described in the second terminal judges, and is meeting describedly when pre-conditioned, based on described channel condition information, directly initiates the end-to-end communication with described first terminal.Visible, described control appliance pre-conditionedly judges fixed whether can between first terminal and the second terminal, carry out end-to-end communication by judging whether described channel condition information meets.When communication channel end to end is not disturbed or disturbed hour, now data transmit the error rate or packet loss is lower or be 0, can between first terminal and the second terminal, carry out end-to-end communication.
The realization of communicating by letter of described first terminal and base station is described below.Described first terminal this channel condition information is sent to base station step comprise: described first terminal is encapsulated in the ascending control information (UCI from terminal to base station by described channel condition information, uplink control information) in, and described ascending control information is sent to described base station.The step that described first terminal receives reference signal configuration information from described base station can comprise: described first terminal receives the Downlink Control Information (DCI from base station to terminal from described base station, and from described Downlink Control Information, extract described reference signal configuration information downlink control information).Alternatively, except utilizing UCI and DCI to carry out the transmission of control information at described first terminal and base station, can also utilize high-level signaling to realize the transmission of this channel condition information and reference signal configuration information.
As previously mentioned, described channel condition information can comprise RI information, PMI information, signal to noise ratio and channel quality information is one or more or its combination in any, can also comprise other parameter.Therefore, with channel condition information accordingly, for example can having for different channel condition information settings different predetermined threshold value, to judge whether described channel condition information meets pre-conditioned.For example, when channel condition information is signal to noise ratio, suppose that its threshold value is SNRth, when estimated signal to noise ratio is less than this SNRth, can carry out end-to-end communication; When channel condition information is PMI information, suppose that its threshold value is PMIth, when estimated PMI information is greater than this PMIth, can carry out end-to-end communication.When adopting two or more parameters as described channel condition information, this predetermined threshold value can be for vector, and correspondingly comprise a plurality of elements.In addition, in the situation that channel condition information is identical, can also be for the difference of the content that will transmit, and change the value of described predetermined threshold value.For example, when transmitting voice from the second terminal to first terminal, (now communication quality requires high), can predetermined threshold value be set to higher value; When transmitting communication quality from the second terminal to first terminal and require the data lower than voice, can described predetermined threshold value be set to lower value.
Except by for channel condition information, arrange predetermined threshold value judge its whether meet pre-conditioned, can also be pre-conditioned by the channel condition information between the channel condition information between this first terminal and the second terminal and described the first and second terminals and base station being compared judge whether to meet.As example, in the second terminal, send in the process of reference signal, except first terminal, base station also receives this reference signal, and obtains the channel condition information between the second terminal and base station based on this reference signal; In addition, base station can also send public reference signal to first terminal and make first terminal obtain the channel condition information between base station and first terminal, and the channel condition information between base station and first terminal is sent to base station, then, base station is by the channel condition information between the channel condition information between base station and the first and second terminals and described first terminal and the second terminal is compared, and determines it is to carry out communicating by letter or carry out end-to-end communication between first terminal and the second terminal between first terminal and the second terminal via base station.In addition, except utilizing the channel condition information between first terminal and the second terminal to determine whether to be applicable to carrying out the end-to-end communication between the two, can also utilize the geographical location information of first terminal and the second terminal, the situation that takies of running time-frequency resource or other information determine whether to be applicable to carrying out end-to-end communication.For example, when the edge of first terminal and the second terminal near distance and the coverage cell in described base station, can determine between first terminal and the second terminal and carry out end-to-end communication.
When described channel condition information meets described when pre-conditioned, this means that the channel status between first terminal and the second terminal is good, can carry out end-to-end communication, based on this channel condition information, carry out the end-to-end communication between first terminal and the second terminal.Based on this channel condition information, carrying out in the process of end-to-end communication, can control described first terminal based on channel condition information and with different communication modes, carry out end-to-end communication from described the second terminal, this communication mode can comprise one or more in transmission mode, transmission method, modulation coding mode.In the process of end-to-end communication, when channel is enough good, can be by reducing encoder bit rate, adopt the type of coding etc. of relative complex to change modulation coding mode, thereby and select suitable transmission mode or transmission method to guarantee the accuracy that the data in end-to-end communication transmit, by reducing communication efficiency, improve communication accuracy; When channel is enough good, can improves encoder bit rate, adopt simple type of coding etc. to improve communication efficiency, and select suitable transmission mode or transmission method, thereby guarantee the accuracy that the data in end-to-end communication transmit.As can be seen here, by the communication mode with different, carry out end-to-end communication, taken into account communication efficiency and accuracy the two.
In S140, described first terminal according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.When described control appliance is base station, base station is to first terminal and the second terminal distribution running time-frequency resource, and stipulate the two modulation coding mode communicating, transmission mode etc., thereby first terminal carries out end-to-end communication according to the control information of described base station and described the second terminal.When described control appliance is the second terminal, described the second terminal can according to the communication protocol (for example, Bluetooth communication protocol) of itself and first terminal agreement set up and first terminal between communication channel, and then utilize the communication channel of setting up to transmit data.
In addition, at control appliance, determine that described channel condition information does not meet described when pre-conditioned, this means that the channel status between first terminal and the second terminal is poor, can not carry out end-to-end communication.Now, if described first terminal and described the second terminal can be carried out telecommunication with base station, described first terminal and described the second terminal communicate via described base station.Be noted that if the two is covered by same base station, described first terminal and the second terminal can communicate via this same base station when described first terminal and the second terminal can be carried out telecommunication with base station; If first terminal and the second terminal are respectively in the coverage in the first different base stations and the second base station, first terminal needs first data to be sent to the first base station, then the first base station is sent to data the second base station, and then is sent to the second terminal by the second base station.
In the above-mentioned communication means end to end of the embodiment of the present invention, by first estimated the channel status between terminal before transmitting data between terminal, and the channel condition information based on obtaining by estimation carries out end-to-end communication, thereby can between terminal equipment, realize reliable, end-to-end communication efficiently.
Fig. 3 has been indicative icon according to the flow chart of the communication means 300 of the embodiment of the present invention.This communication means 300 is the channel estimating of carrying out in first terminal under the control of base station.
This communication means comprises: described first terminal receives reference signal configuration information (S310) from base station; Described first terminal receives reference signal based on described reference signal configuration information from the second terminal, and this reference signal is (S320) that the control of described the second terminal based on described base station sends; Described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, obtains the channel condition information (S330) between described first terminal and described the second terminal; And communicate (S340) based on this channel condition information.
In this communication means 300, first base station sends reference signal configuration information to first terminal and the second terminal, described reference signal configuration information comprises for the running time-frequency resource of sending and receiving reference signal, the information such as power of reference signal as previously mentioned, can also comprise as required other information; Then, described the second terminal sends and surveys reference information to described first terminal according to described reference signal configuration information; Finally, described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, and communicates according to channel estimation results.Description about this part can be referring to the description of carrying out in conjunction with Fig. 2 above.In addition, as previously mentioned, described reference signal is such as the signal that can be the forms such as detection reference signal, public reference signal or DRS (Dedicated Reference Signal).
After the channel condition information obtaining between described first terminal and described the second terminal, can adopt the step of Fig. 4 or Fig. 5 to communicate.Fig. 4 has been indicative icon according to the flow chart of the first illustrative methods communicating based on this channel condition information in the communication means of the embodiment of the present invention.Fig. 5 has been indicative icon according to the flow chart of the second illustrative methods communicating based on this channel condition information in the communication means of the embodiment of the present invention.
The first illustrative methods of Fig. 4 comprises: described first terminal is sent to described base station (S410) by described channel condition information; From described base station, receive the first control information, this first control information is that described base station produces based on described channel condition information, and described base station sends the second control information (S420) to described the second terminal; And described first terminal and described the second terminal are carried out end-to-end communication (S430) according to described the first control information and described the second control information.In the first illustrative methods of this Fig. 4, described first terminal and the second terminal are controlled based on described channel condition information in base station, and end-to-end communication is carried out in described first terminal and the control of the second terminal based on base station.The second illustrative methods of Fig. 5 comprises: described first terminal is sent to described the second terminal (S510) by described channel condition information; From the second terminal, receive command information (S520); With according to described command information and described the second terminal, carry out end-to-end communication (S530).In the second illustrative methods of this Fig. 5, the second terminal is based on carrying out end-to-end communication between described channel condition information control and first terminal.Means and the implementation method about described base station and the second terminal, controlled, can be referring to the operation of relevant described control appliance in the description of carrying out in conjunction with the S130 of Fig. 1 above.
In addition, as the step S140 in conjunction with Fig. 1 is described above, if described channel condition information shows that the channel condition between described first terminal and the second terminal is very poor, described first terminal and the second terminal can not carried out end-to-end communication, and communicate via base station.As can be seen here, can realize neatly communicating by letter between the two with the channel condition information between described the second terminal based on described first terminal, comprise and whether carry out end-to-end communication and how to carry out end-to-end communication.For example, the channel condition between described first terminal and described the second terminal is bad, can communicate to guarantee via base station the reliability of communication; For example, when channel condition good (meeting predetermined condition) between described first terminal and described the second terminal, can between first terminal and the second terminal, carry out end-to-end communication, to improve communication efficiency.
In the technical scheme of the above-mentioned communication means of the embodiment of the present invention, by channel estimating, obtained the channel condition information between two terminal equipments, and communicate based on this channel condition information, thereby allow to improve communication efficiency when guaranteeing communication reliability.
Fig. 6 has been indicative icon according to the block diagram of the terminal equipment 600 of the embodiment of the present invention.This terminal equipment 600 can carry out end-to-end communication with another terminal equipment.
This terminal equipment 600 comprises: receiving element 610, for described another terminal equipment to carry out and this terminal equipment between end-to-end communication time, receive and signal message for estimating that channel status between described terminal equipment and described another terminal equipment is relevant, this signal message comprises for estimating the reference signal of described channel status; Estimation unit 620, for estimate the channel status between described terminal equipment and described another terminal equipment based on described reference signal, and obtains the channel condition information between described terminal equipment and described another terminal equipment; Transmitting element 630, for this channel condition information is sent to control appliance, it is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described terminal equipment and described another terminal equipment carries out end-to-end communication; Short-range communication unit 640, for according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.
For example, when user's operation of described another terminal equipment button corresponding with junction service or icon, described receiving element 610 receives and signal message for estimating that channel status between described terminal equipment and described another terminal equipment is relevant, makes described estimation unit 620 reference signal based in described signal message to know the channel status between described first terminal and described the second terminal.As previously mentioned, described reference signal is such as the signal that can be the forms such as detection reference signal, public reference signal or DRS (Dedicated Reference Signal).
As previously mentioned, according to the difference of carrying out the mode of channel estimating, the channel information obtaining also can be different.In the situation that make an appointment between first terminal and the second terminal for carrying out the reference signal of channel measurement and utilizing this reference signal to estimate, the signal message that this terminal equipment receives comprises that described another terminal equipment is according to the reference signal of making an appointment and sending.The in the situation that of carrying out channel estimating under controlling in base station, now described terminal equipment and described another terminal equipment can communicate with base station, and described receiving element 610 receives described signal message and can comprise: described receiving element receives reference signal configuration information from described base station; Based on described reference signal configuration information, from described another terminal equipment, receive reference signal with described receiving element.About carrying out the reception of concrete signal information of the situation of channel estimating under controlling in base station, can be referring to the description of carrying out in conjunction with Fig. 2.As described receiving element 610, from described base station, receive the exemplary realization of reference signal configuration information, described receiving element 610 receives the Downlink Control Information from base station to terminal from described base station, and from described Downlink Control Information, extracts described reference signal configuration information.In addition, base station can also be sent to described reference signal configuration Information encapsulation the described receiving element 610 of terminal equipment in high-level signaling.Concrete load mode is not construed as limiting the invention.
After described receiving element 610 receives signal message, the reference signal of described estimation unit 620 based in described signal message estimated the channel status between described terminal equipment and described another terminal equipment, and obtains the channel condition information between described terminal equipment and described another terminal equipment.As previously mentioned, described channel condition information can comprise one or more in following parameter: RI information, PMI information, signal to noise ratio and channel quality information, also can comprise other channel condition information as required.In concrete practice, can select suitable channel condition information according to the configuration of the end-to-end communication function of terminal equipment and another terminal equipment etc.Described estimation unit 620 these channel condition informations can be with various channel estimation methods existing or that occur in the future the described reference signal based in described signal message and obtaining, concrete channel estimation methods is not construed as limiting the invention.
Described transmitting element 630 is for being sent to control appliance by this channel condition information obtaining by described estimation unit 620.Described control appliance is the equipment for the end-to-end communication between control terminal and another terminal equipment, and it can be for example described another terminal equipment or base station.
When described control appliance is described another terminal, described in this another terminal judges, whether channel condition information meets described pre-conditioned, and meeting describedly when pre-conditioned, based on described channel condition information, directly initiating the end-to-end communication with described terminal equipment.At described control appliance, be in situation about can communicate by letter with described terminal equipment or another terminal equipment, described transmitting element 630 is sent to described base station by described channel condition information, it is pre-conditioned that described base station determines whether described channel condition information meets, described channel condition information meet described when pre-conditioned, based on described channel condition information, control described terminal equipment and described another terminal equipment carries out end-to-end communication.Described transmitting element 630 can be sent to described base station by described channel condition information by following operation: described channel condition information is encapsulated in from the ascending control information of terminal to base station, and described ascending control information is sent to described base station.Alternatively, described described channel condition information can also being encapsulated in from the high-level signaling of terminal to base station, and then high-level signaling is sent to described base station, thus base station can obtain described channel condition information.
As described control appliance, determine whether described channel condition information meets pre-conditioned mode, can be for described channel condition information arranges corresponding predetermined threshold value, and it is pre-conditioned that described channel condition information and corresponding predetermined threshold value are compared to judge whether described channel condition information meets; Can also by by the channel condition information between this terminal equipment and another terminal equipment and described first and another terminal equipment and base station between channel condition information compare to judge whether to meet pre-conditioned.In addition, except utilizing the channel condition information between terminal equipment and another terminal equipment to determine whether to be applicable to carrying out the end-to-end communication between the two, described control appliance can also utilize the geographical location information of terminal equipment and another terminal equipment, the situation that takies of running time-frequency resource or other information determine whether to be applicable to carry out end-to-end communication.About the concrete operations of control appliance, can be referring to the detailed description of carrying out in the S130 in conjunction with Fig. 1.
When described channel condition information meets describedly when pre-conditioned, this means that the channel status between terminal equipment and another terminal equipment is good, can carry out end-to-end communication.Now, described control appliance can be controlled described terminal equipment based on described channel condition information and with different communication modes, carry out end-to-end communication from described another terminal equipment, this communication mode comprises one or more in transmission mode, transmission method, modulation coding mode, thereby guarantees the accuracy that the data in end-to-end communication transmit.
In addition, at control appliance, determine that described channel condition information does not meet described when pre-conditioned, this means that the channel status between terminal equipment and another terminal equipment is poor, can not carry out end-to-end communication.Now, if described terminal equipment and described another terminal equipment can carry out telecommunication with base station, described terminal equipment and described another terminal equipment communicate via described base station.
Described short-range communication unit 640 for according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.
In the above-mentioned terminal equipment 600 of the embodiment of the present invention, by first estimating the channel status between terminal before communication between terminal, and the channel condition information based on obtaining by estimation carries out end-to-end communication, thereby can between terminal equipment, realize reliable, end-to-end communication efficiently.
Fig. 7 has been indicative icon according to the block diagram of the communicator 700 of the embodiment of the present invention.This communicator 700 is applied to terminal equipment, and it carries out channel estimating under the control of base station, and communicates based on channel estimation results.
This communicator 700 comprises: receiving element 710, for receive reference signal configuration information from base station, and from another terminal equipment, receiving reference signal based on described reference signal configuration information, the reference signal configuration information that described another terminal equipment of this reference signal receives from base station based on this another terminal equipment sends; Estimation unit 720, for estimating the channel status between described terminal equipment and described another terminal equipment based on described reference signal, obtains the channel condition information between described terminal equipment and described another terminal equipment; And communication unit 730, for communicating based on described channel condition information.
After the channel condition information obtaining between described terminal equipment and described another terminal equipment at described estimation unit 720, described communication unit 730 can be based on different described channel condition information, take suitable communication mode and described another terminal equipment to communicate.As example, described communication unit 730 can communicate based on described channel condition information by following operation: described channel condition information is sent to described base station; From described base station, receive the first control information, this first control information is that described base station produces based on described channel condition information; And carry out end-to-end communication according to described the first control information and described another terminal equipment, described base station also sends the second control information to described another terminal equipment, to can realize described end-to-end communication.That is to say, described communication unit 730 control and described another terminal equipment based on base station carries out end-to-end communication.Alternatively, described communication unit 730 communicates based on described channel condition information by following operation: described channel condition information is sent to described another terminal equipment; From described another terminal equipment, receive command information; With according to described command information and described another terminal equipment, carry out end-to-end communication.The control of another terminal equipment that described communication unit 730 bases communicate with has realized the end-to-end communication with this another terminal equipment.
In addition,, if described channel condition information shows that the channel condition between described terminal equipment and another terminal equipment is very poor, described terminal equipment and another terminal equipment can not carry out end-to-end communication, and communicate via base station.As can be seen here, can realize neatly communicating by letter between the two with the channel condition information between described another terminal equipment based on described terminal equipment, comprise and whether carry out end-to-end communication and how to carry out end-to-end communication.
Operation about the unit in Fig. 7 can be referring to the description of carrying out in conjunction with Fig. 3-5 above.
In the technical scheme of the above-mentioned communicator of the embodiment of the present invention, by channel estimating, obtained the channel condition information between two terminal equipments, and communicate based on this channel condition information, thereby allow to improve communication efficiency when guaranteeing communication reliability.
The division that is noted that the unit in Fig. 6 and Fig. 7 is only schematically, can take other dividing mode in practice.In addition, those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the equipment of foregoing description, unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
In the embodiment providing in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.
If described function usings that the form of SFU software functional unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory, random access memory, magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection range with claim.
Claims (18)
1. a communication means end to end, is applied to first terminal, and this communication means comprises:
The second terminal to carry out and this first terminal between end-to-end communication time, this first terminal receives and signal message for estimating that channel status between described first terminal and described the second terminal is relevant, and this signal message comprises for estimating the reference signal of described channel status;
Described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, and obtains the channel condition information between described first terminal and described the second terminal;
Described first terminal is sent to control appliance by this channel condition information, it is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication;
Described first terminal according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.
2. according to the communication means of claim 1, wherein, in the situation that described first terminal and described the second terminal can communicate with base station, described first terminal receive to for estimating that the step of the signal message that channel status between first terminal and the second terminal is relevant comprises:
From described base station, receive reference signal configuration information; With
Based on described reference signal configuration information, from described the second terminal, receive described reference signal, this reference signal is that the control of described the second terminal based on described base station sends.
3. according to the communication means of claim 2, wherein, described control appliance is described base station, and described first terminal is sent to described base station by this channel condition information,
Described base station described channel condition information meet described when pre-conditioned, based on described channel condition information, control described first terminal and described the second terminal is carried out end-to-end communication.
4. according to the communication means of claim 3, wherein,
The described step that this channel condition information is sent to base station comprises: described first terminal is encapsulated in described channel condition information from the ascending control information of terminal to base station, and described ascending control information is sent to described base station;
The described step that receives reference signal configuration information from described base station comprises: described first terminal receives the Downlink Control Information from base station to terminal from described base station, and from described Downlink Control Information, extracts described reference signal configuration information.
5. according to the communication means of claim 1, wherein, described control appliance is controlled described first terminal and described the second terminal based on described channel condition information and is carried out end-to-end communication and comprise:
Based on channel condition information, control described first terminal and with different communication modes, carry out end-to-end communication from described the second terminal, this communication mode comprises one or more in transmission mode, transmission method, modulation coding mode.
6. according to the communication means of claim 1, wherein, at described channel condition information, do not meet describedly when pre-conditioned, if described first terminal and described the second terminal can communicate with base station, described first terminal and described the second terminal communicate via described base station.
7. a communication means, is applied to first terminal, and the method comprises:
Described first terminal receives reference signal configuration information from base station;
Described first terminal receives reference signal based on described reference signal configuration information from the second terminal, and this reference signal is that the control of described the second terminal based on described base station sends;
Described first terminal is estimated the channel status between described first terminal and described the second terminal based on described reference signal, obtains the channel condition information between described first terminal and described the second terminal; With
Based on this channel condition information, communicate.
8. according to the communication means of claim 7, describedly based on this channel condition information, communicate and comprise:
Described first terminal is sent to described base station by described channel condition information;
From described base station, receive the first control information, this first control information is that described base station produces based on described channel condition information, and described base station sends the second control information to described the second terminal; And
Described first terminal and described the second terminal are carried out end-to-end communication according to described the first control information and described the second control information.
9. according to the communication means of claim 7, describedly based on this channel condition information, communicate and comprise:
Described first terminal is sent to described the second terminal by described channel condition information;
From the second terminal, receive command information; With
According to described command information and described the second terminal, carry out end-to-end communication.
10. a terminal equipment, carries out end-to-end communication with another terminal equipment, and this terminal equipment comprises:
Receiving element, for described another terminal equipment to carry out and this terminal equipment between end-to-end communication time, receive and signal message for estimating that channel status between described terminal equipment and described another terminal equipment is relevant, this signal message comprises for estimating the reference signal of described channel status;
Estimation unit, for estimate the channel status between described terminal equipment and described another terminal equipment based on described reference signal, and obtains the channel condition information between described terminal equipment and described another terminal equipment;
Transmitting element, for this channel condition information is sent to control appliance, it is pre-conditioned that this control appliance determines whether described channel condition information meets, and described channel condition information meet described when pre-conditioned, based on described channel condition information, control described terminal equipment and described another terminal equipment carries out end-to-end communication;
Short-range communication unit, for according to the control of described control appliance, carry out and described the second terminal between end-to-end communication.
11. according to the terminal equipment of claim 10, and wherein, in the situation that described terminal equipment and described another terminal equipment can communicate with base station, described receiving element receives described signal message and comprises:
Described receiving element receives reference signal configuration information from described base station; With
Described receiving element receives described reference signal based on described reference signal configuration information from described another terminal equipment.
12. according to the terminal equipment of claim 11, and wherein, described control appliance is described base station, and described transmitting element is sent to described base station by described channel condition information,
Described base station described channel condition information meet described when pre-conditioned, based on described channel condition information, control described terminal equipment and described another terminal equipment carries out end-to-end communication.
13. according to the terminal equipment of claim 12, wherein, described transmitting element is sent to described base station by following operation by described channel condition information: described channel condition information is encapsulated in from the ascending control information of terminal to base station, and described ascending control information is sent to described base station;
Described receiving element receives reference signal configuration information by following operation from described base station: from described base station, receive the Downlink Control Information from base station to terminal, and from described Downlink Control Information, extract described reference signal configuration information.
14. according to the terminal equipment of claim 10, wherein, described control appliance is controlled described terminal equipment based on described channel condition information and with different communication modes, is carried out end-to-end communication from described another terminal equipment, and this communication mode comprises one or more in transmission mode, transmission method, modulation coding mode.
15. according to the terminal equipment of claim 10, wherein, at described channel condition information, do not meet describedly when pre-conditioned, if described terminal equipment and described another terminal equipment can communicate with base station, described terminal equipment and described another terminal equipment communicate via described base station.
16. 1 kinds of communicators, are applied to terminal equipment, and this communicator comprises:
Receiving element, for receive reference signal configuration information from base station, and from another terminal equipment, receiving reference signal based on described reference signal configuration information, the reference signal configuration information that described another terminal equipment of this reference signal receives from base station based on this another terminal equipment sends;
Estimation unit, for estimating the channel status between described terminal equipment and described another terminal equipment based on described reference signal, obtains the channel condition information between described terminal equipment and described another terminal equipment; And
Communication unit, for communicating based on described channel condition information.
17. according to the communicator of claim 16, and wherein, described communication unit communicates based on described channel condition information by following operation:
Described channel condition information is sent to described base station;
From described base station, receive the first control information, this first control information is that described base station produces based on described channel condition information; And
According to described the first control information and described another terminal equipment, carry out end-to-end communication,
Described base station also sends the second control information to described another terminal equipment, to can realize described end-to-end communication.
18. according to the communicator of claim 16, and wherein, described communication unit communicates based on described channel condition information by following operation:
Described channel condition information is sent to described another terminal equipment;
From described another terminal equipment, receive command information; With
According to described command information and described another terminal equipment, carry out end-to-end communication.
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