CN102098084A - Method and device for transmitting and receiving channel detection reference signals - Google Patents
Method and device for transmitting and receiving channel detection reference signals Download PDFInfo
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Abstract
The invention provides a method and a device for transmitting and receiving channel detection reference signals. The method comprises a method for transmitting the channel detection reference signals in a terminal of a mobile communication network, wherein the terminal comprises a plurality of antennas; and the method comprises the following steps of: transmitting the channel detection reference signals in a plurality of frames through the plurality of antennas, wherein in any one of the plurality of frames, the terminal transmits the channel detection reference signals through a part of antennas in the plurality of antennas. By the method and the device provided by the invention, in one frame, more terminals can transmit the channel detection reference signals in the configured antennas so as to improve the terminal number of real-time dispatching.
Description
Technical field
The present invention relates to mobile communication system, relate in particular in mobile communication system and to send and the method and the device of receive channel detection reference signal.
Background technology
In wireless communication system, the Sounding Reference Signal (soundingreference signal) that terminal sends usually can be used for doing channel condition information by the base station and estimate.In transmission course, the Sounding Reference Signal that different terminals sends or the Sounding Reference Signal that a plurality of terminal antenna sent of same terminal need to keep quadrature in the mode of time division multiplexing, frequency division multiplexing or code division multiplexing, therefore need take more transfer resource.Before this, common terminal quantity/density is little, and the antenna that each terminal disposed is generally less, such as 1.Recently, multi-antenna technology is more and more used, and the required transfer resource that takies of transmitting channel detection reference signal is also just more.In the prior art, in same 10ms radio frames or 5ms radio frames in the pairing time cycle, be generally each antenna that terminal disposed and all distinguish distributes resource blocks, so that each antenna of this terminal, can utilize the Resource Block that is assigned with separately, concentrate in the time cycle of same 10ms radio frames or 5ms radio frames, to base station transmitting channel detection reference signal, do the estimation of channel condition information for the base station, thereby this terminal is dispatched.Wherein, Resource Block is in terminal equipment and base station communication channel, by the smallest transmission unit of time division multiplexing, frequency division multiplexing, the common decision of three kinds of multiplex modes of code division multiplexing.
At present, the terminal quantity in sub-district/unit communication zone/density increases, and the number of antennas of each terminal configuration obviously increases, and the Resource Block in order to the Bearer Channel detection reference signal of channel is limited.So,, can't satisfy the demand of all terminal transmitting channel detection reference signals if above-mentioned strategy of the prior art makes the channel resource block of existing communication system because of the increase of the number of antennas of terminal number and each terminal configuration.That is: after the channel resource block of all communication systems all has been assigned with, Resource Block that quite a few terminal is not assigned with channel is still arranged in order to the transmitting channel detection reference signal, this directly causes this part terminal can't be by the base station Real-Time Scheduling.For example, to a kind of typical time division duplex (TDD, Time Division Duplex) system, the TDD cycle wherein is a 5ms frame, comprise two sub-frame of uplink, two descending sub frames, a special subframe, usually, wherein: some symbol in the sub-frame of uplink, be Resource Block, can be used to the transmitting channel detection reference signal, can have two symbols to be used to the transmitting channel detection reference signal in the special subframe.For the communication system that a total number of terminals is K, suppose in the cycle of a tdd frame that total N Sounding Reference Signal can be supported to send, and each terminal configuration there be M antenna.Then according to the allocation strategy to the Resource Block in the above-mentioned Sounding Reference Signal process of transmitting of the prior art, the quantity that is supported the terminal of real-time transmitting channel detection reference signal in the system is: N/M.Because development and renewal along with terminal technology, the numerical value of M increases, so the N/M value increases along with M and descends, directly cause not being supported in the system terminal number of transmitting channel detection reference signal: K-N/M to increase, the terminal of these quantity all can't be by Real-Time Scheduling in mobile communication system.
Summary of the invention
At the problem in the above-mentioned background technology the present invention is proposed, its purpose is to make full use of resource available in the channel of communication system, make the terminal of greater number send effective Sounding Reference Signal constantly circularly by the antenna of its configuration, raising can supply the number of the terminal of Real-Time Scheduling.
According to a first aspect of the invention, a kind of method that is used for the transmitting channel detection reference signal in the terminal of mobile communications network is provided, described terminal comprises a plurality of antennas, said method comprising the steps of: by described a plurality of antennas transmitting channel detection reference signal in a plurality of frames; Wherein in the arbitrary frame in described a plurality of frames, described terminal is only by a part of antenna transmission Sounding Reference Signal in described a plurality of antennas.
According to one embodiment of present invention, terminal is a transmitting channel detection reference signal periodically.Each cycle comprises a plurality of frames; In arbitrary frame of one-period, terminal is by its part antenna transmission Sounding Reference Signal; Within one-period, terminal is by the equal transmitting channel detection reference signal in a certain frame at least of each antenna.
According to a second aspect of the invention, a kind of method that is used for the receive channel detection reference signal in the base station of mobile communications network is provided, the terminal of described mobile communications network comprises a plurality of antennas, said method comprising the steps of: a) receive described terminal described Sounding Reference Signal by described a plurality of antenna transmission in a plurality of frames; And b) according to the described Sounding Reference Signal calculating channel state information that receives among the step a; Wherein, in the arbitrary frame in described a plurality of frames, described base station only receives the Sounding Reference Signal of described terminal by a part of antenna transmission in described a plurality of antennas.
According to one embodiment of present invention, terminal is a transmitting channel detection reference signal periodically, and correspondingly, the base station is a receive channel detection reference signal periodically.Each cycle comprises a plurality of frames; In arbitrary frame of one-period, the base station only receives terminal by its part antenna transmission Sounding Reference Signal; Within one-period, the base station receives the Sounding Reference Signal that each antenna sent of terminal.
In addition, the present invention also provides dispensing device and the receiving system corresponding to above-mentioned sending method and method of reseptance:
According to a third aspect of the invention we, a kind of dispensing device in the terminal of mobile communications network is provided, described terminal comprises a plurality of antennas, and this dispensing device comprises: sending module is used for by described a plurality of antennas transmitting channel detection reference signal in a plurality of frames; Wherein in the arbitrary frame in described a plurality of frames, described sending module is only by a part of antenna transmission Sounding Reference Signal in described a plurality of antennas.
According to one embodiment of present invention, the dispensing device in the terminal is a transmitting channel detection reference signal periodically.Each cycle comprises a plurality of frames; In arbitrary frame of one-period, dispensing device is by the part antenna transmission Sounding Reference Signal of terminal; Within one-period, dispensing device each antenna by terminal is transmitting channel detection reference signal in a certain frame at least all.
According to a forth aspect of the invention, a kind of receiving system in the base station of mobile communications network is provided, the terminal of described mobile communications network comprises a plurality of antennas, this receiving system comprises: receiver module is used to receive the described Sounding Reference Signal of described terminal by described a plurality of antenna transmission; Determination module is used for determining channel condition information according to the described Sounding Reference Signal that receives; Wherein, described receiver module receives the described Sounding Reference Signal of described terminal by described a plurality of antenna transmission in a plurality of frames; In arbitrary frame in described a plurality of frames, described receiver module only receives the Sounding Reference Signal of described terminal by a part of antenna transmission in described a plurality of antennas.
According to one embodiment of present invention, the dispensing device in the terminal is a transmitting channel detection reference signal periodically, and correspondingly, the receiving system in the base station is the receive channel detection reference signal periodically.Each cycle comprises a plurality of frames; In arbitrary frame of one-period, the receiving system in the base station only receives the Sounding Reference Signal of terminal by its part antenna transmission; Within one-period, the receiving system in the base station receives the Sounding Reference Signal that each antenna sent of terminal.
Method that the application of the invention provides and device, terminal can be finished the process of transmitting channel detection reference signal dispersedly by its a plurality of antennas in a plurality of frames, thereby can overcome a terminal takies excess resource because of its a plurality of antennas concentrated area transmitting channel detection reference signal in a frame problem.Therefore, under the situation of the available resources limited amount of communication system, in a frame, have more the multiple terminals can be, and then improve can be for the quantity of the terminal of Real-Time Scheduling by the antenna transmission Sounding Reference Signal of its configuration.
Description of drawings
By reading the detailed description of doing with reference to the following drawings that non-limiting example is done, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the schematic diagram of the topological structure of the mobile communications network that comprises terminal and base station according to an embodiment of the invention;
Fig. 2 shows the time division duplex frame structure schematic diagram that uses according to an embodiment of the invention between terminal and base station;
Fig. 3 shows the Frequency Division Duplexing (FDD) frame structure schematic diagram that uses according to an embodiment of the invention between terminal and base station;
Fig. 4 shows the method flow diagram that is used for the transmitting channel detection reference signal in the terminal of mobile communications network according to an embodiment of the invention;
Fig. 5 show according to an embodiment of the invention at mobile communications network terminal and the base station between a plurality of frames of sending;
Fig. 6 shows the method flow diagram that is used for the receive channel detection reference signal in the base station of mobile communications network according to an embodiment of the invention;
Fig. 7 shows the structured flowchart of the dispensing device in the terminal of mobile communications network according to an embodiment of the invention;
Fig. 8 shows the structured flowchart of the receiving system in the base station of mobile communications network according to an embodiment of the invention;
In the drawings, run through different diagrammatic sketch, identical or similar Reference numeral is represented characteristic of correspondence.
Embodiment
At moving velocity of terminal is not under the extra high situation, and channel status generally can not change very fast, and terminal can adopt the form of " sparse transmission ": be about to its Sounding Reference Signal and be scattered in a plurality of frames, rather than concentrate in the frame.In other words, terminal with its in a plurality of frames, send by a circulate Sounding Reference Signal that sends the cycle of the Sounding Reference Signal that sends of each antenna, under terminal low-speed motion situation, this terminal that is dispersed in a plurality of frames passes through between the Sounding Reference Signal of each antenna transmission stronger correlation is arranged still.Therefore, this Sounding Reference Signal also can support the base station that receives them to obtain channel condition information (CSI, Channel State Information) and channel reciprocity.
In the above-mentioned transmission cycle, corresponding receiving cycle refers to the time that frame experienced, to adopting the Long Term Evolution project (LTE of FDD duplex mode, Long Term Evolution) frame structure is generally the 10ms duration, and then its transmission cycle/receiving cycle corresponds to 10ms.To the frame structure of the Long Term Evolution that adopts the TDD duplex mode, frame generally is divided into 5ms periodic frame and 10ms periodic frame, and then a transmission cycle/receiving cycle just corresponds to 5ms or 10ms respectively.
Fig. 1 is the schematic diagram of the topological structure of mobile communications network according to an embodiment of the invention.As shown in the figure, comprise terminal 1 and base station 3 in this network, terminal 1 intercoms mutually with base station 3.As a kind of replacement scheme, the terminal 1 in the mobile communications network also can intercom by one or more relay stations mutually with base station 3, and the topological structure of this class distortion does not influence essence of the present invention.
Fig. 2 is the time division duplex frame structure schematic diagram that uses between terminal and base station according to an embodiment of the invention.As shown in Figure 2, the cycle of adopting in the present embodiment is the uplink frame of 10ms, field by two 5ms is formed, the structure of the field inside of each 5ms comprises three kinds of subframes: descending sub frame, sub-frame of uplink and special subframe, more than the total quantity of three kinds of subframes be 5, the cycle of every kind of subframe is 1ms.Each subframe wherein constitutes by 14 symbols: OFDM symbol 0, and OFDM symbol 1, OFDM symbol 2 ..., OFDM symbol 13.Usually, in 5 subframes that 1 field comprises, except that 1 special subframe, in all the other 4 conventional subframes the ratio of descending sub frame and sub-frame of uplink can be 3: 1,2: 2 or 1: 3.As shown in the figure, comprise sub-frame of uplink U2, U3 in the field, descending sub frame D0, D4, and special subframe S1.Conventional subframe structure is made up of the time slot of two 0.5ms, comprises three special time slots in the special subframe: descending pilot frequency time slot (DwPTS), protection be (GP), uplink pilot time slot (UpPTS) at interval, has adopted unified 1ms subframe lengths simultaneously.Descending pilot frequency time slot is a descending time slot, and uplink pilot time slot is an ascending time slot, and protection does not transmit any signal at interval, for protection is provided between the up-downgoing, avoids occurring between the up-downgoing " cross interference ".Wherein, the length of uplink pilot time slot is more fixing, supports an OFDM symbol or two kinds of length of two OFDM symbols, and the length of protection interval and descending pilot frequency time slot is a kind of structure of configurable uplink and downlink timeslot length.Wherein, sub-frame of uplink and special subframe all can be used to carry the Sounding Reference Signal that terminal sends.
Fig. 3 is the Frequency Division Duplexing (FDD) of using between terminal and base station according to an embodiment of the invention (FDD, a Frequency Division Duplex) frame structure schematic diagram.The frame structure of 10ms comprises 10 subframe: subframe SF0 to subframe SF9, and each subframe duration is 1ms, is made up of the time slot of two 0.5ms.
According to one embodiment of present invention, terminal configuration 4 antennas, with the communication process of base station in, part antenna is wherein only arranged, 2 antennas for example are by base station activation and be used for the transmitting channel detection reference signal.
For simplicity's sake, among the present invention among the following embodiment, description all be that all antennas of terminal are all by base station activation and be used for the situation of transmitting channel detection reference signal.
Fig. 4 shows the method flow diagram that is used for the transmitting channel detection reference signal in the terminal of mobile communications network according to an embodiment of the invention.As shown in Figure 4, this method comprises a step S101.Fig. 5 show according to an embodiment of the invention at mobile communications network terminal and the base station between a plurality of frames of sending.There is shown eight frame F1, F2, F3, F4, F5, F6, F7, F8 continuous on the time domain.Be illustrated below in conjunction with Fig. 1, Fig. 4, Fig. 5.
In the present embodiment, terminal 1 disposes four antenna A11, A12, A13, A14.In step S101, terminal 1 is by its four antennas transmitting channel detection reference signal in a plurality of frames; Wherein in the arbitrary frame in a plurality of frames, terminal 1 is only by a part of antenna transmission Sounding Reference Signal in a plurality of antennas.
For example, terminal 1 is by antenna A11, A12, A13, A14 transmitting channel detection reference signal in frame F1, F3; Wherein in frame F1, pass through antenna A11, A12 transmitting channel detection reference signal, in frame F3, pass through antenna A13, A14 transmitting channel detection reference signal.
Again for example, terminal 1 is by antenna A11, A12, A13, A14 transmitting channel detection reference signal in frame F1, F3, F5, F7; Wherein in frame F1, pass through antenna A11 transmitting channel detection reference signal, in frame F3, pass through antenna A12 transmitting channel detection reference signal, in frame F5,, in frame F7, pass through antenna A14 transmitting channel detection reference signal by antenna A13 transmitting channel detection reference signal.
Alternatively, be used for each frame of Bearer Channel detection reference signal, terminal 1 is all according to identical pattern, the transmitting channel detection reference signal.The pattern here be meant shared resource a frame the particular location relation in the resource sometimes/frequently.
For example, terminal 1 in frame F1 by the shared resource of antenna A11, A12 transmitting channel detection reference signal with in frame F3, have identical pattern by the shared resource of antenna A13, A14 transmitting channel detection reference signal.The pattern here is used to indicate the available resources of Sounding Reference Signal.
Alternatively, be determined in the process that above-mentioned pattern can establish a communications link with terminal 1 first in base station 3; Perhaps, above-mentioned pattern also can dynamically be adjusted, be determined in the communication process of base station 3 and terminal 1 according to the communication system working condition; Perhaps, preestablish the possibility of above-mentioned pattern, and 3 set up the selected concrete pattern that adopts when communicating by letter first with terminal 1 in the base station.
According to one embodiment of present invention, terminal 1 is periodically according to predefined procedure transmitting channel detection reference signal in a looping fashion.The predefined procedure here is the order of the antenna that utilized of terminal 1 transmitting channel detection reference signal.
For example, four frame durations are one-period, and frame F1 to F4 is first cycle, and frame F5 to F8 is a second period, and the rest may be inferred.Comprise two signal frames that are used to carry the Sounding Reference Signal of terminal 1 in the one-period, for example: frame F1, F3 in the period 1, frame F5, F7 in second round.Predefined procedure for example antenna A11, A12 is one group, and antenna A13, A14 are another group, and two groups alternately are used for the transmitting channel detection reference signal, can be expressed as with mathematic sign: { { A11, A12}, { A13, A14}}.Particularly, in the period 1, terminal 1 is by antenna A11, A12 transmitting channel detection reference signal in frame F1, by antenna A13, A14 transmitting channel detection reference signal in frame F3; In second round, terminal 1 is by antenna A11, A12 transmitting channel detection reference signal in frame F5, by antenna A13, A14 transmitting channel detection reference signal in frame F7; The rest may be inferred for situation in subsequent cycle.
Again for example, eight frame durations are one-period, and frame F1 to F8 is the period 1, and the rest may be inferred.Comprise four signal frames that are used to carry the Sounding Reference Signal of terminal 1 in the one-period, for example: frame F2, F4 in the period 1, F6, F8.Predefined procedure for example antenna A11, A12, A13, A14 is respectively done for oneself one group, and four groups are used for the transmitting channel detection reference signal successively, can be expressed as with mathematic sign: { A11, A12, A13, A14}.Particularly, in the period 1, terminal 1 is by antenna A11 transmitting channel detection reference signal in frame F2, by antenna A12 transmitting channel detection reference signal in frame F4, by antenna A13 transmitting channel detection reference signal in frame F6, by antenna A14 transmitting channel detection reference signal in frame F8; The rest may be inferred for situation in subsequent cycle.Predefined procedure can also be other orders, for example: { A11, A13, A14, A12}.
Above-mentioned predefined procedure can be to communicate by letter before the beginning between terminal 1 and base station 3 or begin determined order at the beginning of the communication, also can be according to communication scenes and the new sequences after adjusting in real time.
For example, with at the beginning of communicating by letter in base station 3, { A11, A12, A13, A14} come the transmitting channel detection reference signal to terminal 1 in order in terminal 1; In communication process, produce a triggering signal because of the variation of communication scenes by terminal 1 or base station 3, terminal 1 is adjusted the antenna order according to this triggering signal, then { A11, A13, A14, A12} come the transmitting channel detection reference signal in order.
Again for example, each antenna takies the equivalent resource and comes transmitting channel prediction reference signal, and with at the beginning of communicating by letter in base station 3, { { A11, A12}, { A13, A14}} come the transmitting channel detection reference signal to terminal 1 in order in terminal 1; In communication process, produce a triggering signal because of the variation of communication scenes by terminal 1 or base station 3, terminal 1 is adjusted the antenna order according to this triggering signal, then { A11, A13, A14, A12} come the transmitting channel detection reference signal in order.Like this, the shared resource of terminal 1 average every frame is minimized, and system can support more terminal.
According to one embodiment of present invention, a plurality of frames that are used to carry the Sounding Reference Signal of terminal 1 are continuous on time domain.
For example, two frame durations are one-period, and frame F1, F2 are first cycle, and frame F3, F4 are second period, and the rest may be inferred.Two frames in the one-period all are used to carry the Sounding Reference Signal of terminal 1.In each cycle, { { A11, A12}, { A13, A14}} come the transmitting channel detection reference signal to terminal 1 according to order.
Again for example, four frame durations are one-period, and frame F1 to F4 is first cycle, and frame F5 to F8 is a second period, and the rest may be inferred.Four frames in the one-period all are used to carry the Sounding Reference Signal of terminal 1.In each cycle, { A11, A12, A13, A14} come the transmitting channel detection reference signal to terminal 1 according to order.
Like this, can be so that terminal 1 utilize the one-period time of its a plurality of antenna transmission Sounding Reference Signal shorter, thus can satisfy the requirement of the channel coherence time (coherencetime) in the channel reciprocity.
According to one embodiment of present invention, also comprise a terminal 1 ' and a terminal 1 in the communication network " (not illustrating in the drawings).Terminal 1 ' disposes two antenna A21, A22, terminal 1 " dispose 3 antenna A31, A32, A33.The employed frame of communication system is the time division duplex frame structure, as shown in Figure 2, comprises sub-frame of uplink U2, U3, and special subframe S1.
Terminal 1 ' and terminal 1 can be used the OFDM symbol 13 in as shown in Figure 2 the sub-frame of uplink, distribute to different terminals at interval with odd number, the even number of subcarrier in frequency domain.The odd number subcarrier in frequency domain of OFDM symbol 13, comprise subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, subcarrier 11, be assigned to terminal 1, use when utilizing antenna A11, A12, A13, A14 transmitting channel detection reference signal according to said sequence for it.And the even number subcarrier in frequency domain of OFDM symbol 13, comprise subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, subcarrier 10, subcarrier 12, be assigned to when terminal 1 ' is utilized antenna A21 and A22 transmitting channel detection reference signal for it according to a definite sequence and use.
Terminal 1 " with base station 3 when communicating by letter first; can be with preceding 6 subcarrier in frequency domain of the OFDM symbol 1 of special subframe S1; be subcarrier 1, subcarrier 2, subcarrier 3, subcarrier 4, subcarrier 5, subcarrier 6; distribute to terminal 1 ", use when utilizing its antenna A31, A32, A33 transmitting channel detection reference signal according to a definite sequence for it.
Alternatively, if also have other-end in the system, then can distribute the OFDM sign resources in other sub-frame of uplink and/or the special subframe to be used for the transmitting channel detection reference signal for this terminal.
Above-mentioned Resource Allocation Formula has promptly disclosed three kinds of patterns, corresponds respectively to terminal 1, terminal 1 ', terminal 1 ".Certainly, the invention is not restricted to above-mentioned pattern allocation strategy, also can come the Bearer Channel detection reference signal by the combination in any of available resources in above-mentioned sub-frame of uplink and/or the special subframe according to the needs of communications applications.The configuration of the uplink pilot time slot in sub-frame of uplink shown in Fig. 2 and the special subframe is a kind of specific configuration mode, and in the actual application, sub-frame of uplink and/or special subframe also can have other allocation plan as required.
Alternatively, if the time/after the frequency resource allocation is intact, also have terminal to need the transmitting channel detection reference signal, also can distribute by the sign indicating number territory.Be without loss of generality, Sounding Reference Signal can be made of the Zadoff-Chu sequence, by the deviant of configuration Zadoff-Chu sequence, reaches the effect of code division multiplexing, in the case, pattern is the Resource Allocation Formula of a kind of time domain, three dimension decisions of frequency and sign indicating number territory.
According to one embodiment of present invention, communication system is a frequency division duplex system, adopts Frequency Division Duplexing (FDD) frame structure as shown in Figure 3.The Sounding Reference Signal of terminal 1 is carried in combination by available resources in the uplink frame (comprising subframe SF0 to SF9).The uplink frame structure of the time division duplex frame of Long Term Evolution project is fully identical with downlink frame in the above aspect of time slot, and as shown in Figure 3, also the fundamental sum downlink frame is identical for the time slot inner structure, and Sounding Reference Signal (SRS) is the OFDM symbol.
Fig. 6 is the method flow diagram that is used for the receive channel detection reference signal in the base station of mobile communications network according to an embodiment of the invention.As shown in Figure 6, this method comprises two step S201, S202.Be illustrated below in conjunction with Fig. 1, Fig. 5, Fig. 6.
In the present embodiment, terminal 1 disposes four antenna A11, A12, A13, A14.
In step S201, base station 3 receiving terminals 1 pass through the Sounding Reference Signal of four antenna transmission in a plurality of frames, wherein, in the arbitrary frame in a plurality of frames, base station 3 only receives the Sounding Reference Signal of terminal 1 by a part of antenna transmission in four antennas.
In step S202, channel condition information will be determined according to the Sounding Reference Signal that receives among the step S201 in base station 3.
For example, in step S201, base station 3 receives the Sounding Reference Signal that terminal 1 sends by antenna A11, A12 in frame F1, and receives the Sounding Reference Signal that terminal 1 sends by antenna A13, A14 in frame F3.
Again for example, in step S201, base station 3 receives terminal 1 and passes through the Sounding Reference Signal of antenna A11 transmission, the Sounding Reference Signal that sends by antenna A12 in frame F1, pass through the Sounding Reference Signal of antenna A13 transmission in frame F5, pass through the Sounding Reference Signal that antenna A14 sends in frame F3 in frame F7.
Alternatively, be used for each frame of Bearer Channel detection reference signal, terminal 1 is all according to identical pattern transmitting channel detection reference signal.Correspondingly, in step S201, the receive channel detection reference signal will be come according to the employed pattern of terminal 1 transmitting channel detection reference signal in base station 3.
Alternatively, be determined in the process that above-mentioned pattern can establish a communications link with terminal 1 first in base station 3; Perhaps, above-mentioned pattern also can dynamically be adjusted, be determined in the communication process of base station 3 and terminal 1 according to the communication system working condition; Perhaps, preestablish the possibility of above-mentioned pattern, and 3 set up the selected concrete pattern that adopts when communicating by letter first with terminal 1 in the base station.
According to one embodiment of present invention, terminal 1 is periodically according to predefined procedure transmitting channel detection reference signal in a looping fashion.Correspondingly, in step S201, base station 3 is periodically according to predefined procedure receive channel detection reference signal in a looping fashion.
For example, four frame durations are one-period, and frame F1 to F4 is first cycle, and frame F5 to F8 is a second period, and the rest may be inferred.Comprise two signal frames that are used to carry the Sounding Reference Signal of terminal 1 in the one-period, for example: frame F1, F3 in the period 1, frame F5, F7 in second round.Predefined procedure for example is { { A11, A12}, { A13, A14}}.Particularly, in the period 1, base station 3 will receive the Sounding Reference Signal of self terminal 1 at frame F1, F3; In second round, base station 3 will receive the Sounding Reference Signal of self terminal 1 at frame F5, F7; The rest may be inferred for situation in subsequent cycle.Base station 3 also will be determined the source antenna that comes of received Sounding Reference Signal according to predefined procedure.In step S202, channel condition information between base station 3 and the terminal 1 will be in each cycle be determined according to the Sounding Reference Signal that comes self terminal 1 that receives in base station 3.
Again for example, eight frame durations are one-period, and frame F1 to F8 is the period 1, and the rest may be inferred.Comprise four signal frames that are used to carry the Sounding Reference Signal of terminal 1 in the one-period, for example: frame F2, F4 in the period 1, F6, F8.Predefined procedure for example is { A11, A12, A13, A14}.Particularly, in the period 1, base station 3 will receive the Sounding Reference Signal of self terminal 1 at F2, F4, F6, F8; The rest may be inferred for situation in subsequent cycle.Base station 3 also will be determined the source antenna that comes of received Sounding Reference Signal according to predefined procedure.In step S202, channel condition information between base station 3 and the terminal 1 will be in each cycle be determined according to the Sounding Reference Signal that comes self terminal 1 that receives in base station 3.
Above-mentioned predefined procedure can be to communicate by letter before the beginning between terminal 1 and base station 3 or begin determined order at the beginning of the communication, also can be according to communication scenes and the new sequences after adjusting in real time.
For example, with at the beginning of communicating by letter in base station 3, { A11, A12, A13, A14} come the transmitting channel detection reference signal to terminal 1, and the receive channel detection reference signal is correspondingly come in proper order according to this in base station 3 in order in terminal 1.In communication process, produce a triggering signal because of the variation of communication scenes by terminal 1 or base station 3, terminal 1 is adjusted the antenna order according to this triggering signal, then { A11, A13, A14, A12} come the transmitting channel detection reference signal, and base station 3 correspondingly transfers to come the receive channel detection reference signal in proper order according to this in order.
Again for example, each antenna takies the equivalent resource and comes transmitting channel prediction reference signal.With at the beginning of communicating by letter in base station 3, { { A11, A12}, { A13, A14}} come the transmitting channel detection reference signal to terminal 1, and the receive channel detection reference signal is correspondingly come in proper order according to this in base station 3 in order in terminal 1.In communication process, produce a triggering signal because of the variation of communication scenes by terminal 1 or base station 3, terminal 1 is adjusted the antenna order according to this triggering signal, then { A11, A13, A14, A12} come the transmitting channel detection reference signal, and base station 3 correspondingly transfers to come the receive channel detection reference signal in proper order according to this in order.Like this, the shared resource of terminal 1 average every frame is minimized, and system can support more terminal.
According to one embodiment of present invention, a plurality of frames that are used to carry the Sounding Reference Signal of terminal 1 are continuous on time domain, and correspondingly, base station 3 receives the Sounding Reference Signal that comes self terminal 1 in continuous a plurality of frames.
For example, two frame durations are one-period, and frame F1, F2 are first cycle, and frame F3, F4 are second period, and the rest may be inferred.Two frames in the one-period all are used to carry the Sounding Reference Signal of terminal 1.In each cycle, { { A11, A12}, { A13, A14}} be the transmitting channel detection reference signal in two frames in this cycle according to order for terminal 1.Correspondingly, in step S201, base station 3 will receive the Sounding Reference Signal that comes self terminal 1 according to predefined procedure in continuous a plurality of frames.
Again for example, four frame durations are one-period, and frame F1 to F4 is first cycle, and frame F5 to F8 is a second period, and the rest may be inferred.Four frames in the one-period all are used to carry the Sounding Reference Signal of terminal 1.In each cycle, { A11, A12, A13, A14} come the transmitting channel detection reference signal to terminal 1 according to order.Correspondingly, in step S201, base station 3 will receive the Sounding Reference Signal that comes self terminal 1 according to predefined procedure in continuous a plurality of frames.
Like this, can be so that terminal 1 utilize the one-period time of its a plurality of antenna transmission Sounding Reference Signal shorter, thus can satisfy the requirement of the channel coherence time (coherencetime) in the channel reciprocity.
In the previous embodiment, system is terminal 1, terminal 1 ', terminal 1 " distribute different resources to be used for the transmitting channel detection reference signal respectively.According to one embodiment of present invention, correspondingly, base station 3 will be according to terminal 1, terminal 1 ', terminal 1 " resource of being distributed separately receives its Sounding Reference Signal separately; and base station 3 will come to determine the source antenna that comes of received channel reference signal in proper order according to three terminals antenna separately.
Fig. 7 shows the structured flowchart of the dispensing device in the terminal of mobile communications network according to an embodiment of the invention.As shown in the figure, dispensing device 10 comprises sending module 11.Dispensing device 10 typically is arranged at terminal 1, terminal 1 ' or terminal 1 " in.
In this embodiment, dispensing device 10 is arranged in the terminal 1, and terminal 1 has disposed many antennas.Sending module 11 is used to carry out abovementioned steps S101, by a plurality of antennas transmitting channel detection reference signal in a plurality of frames of terminal 1; Wherein in the arbitrary frame in described a plurality of frames, sending module 11 is only by a part of antenna transmission Sounding Reference Signal in a plurality of antennas of terminal 1.
According to one embodiment of present invention, sending module 11 in the dispensing device 10 in the terminal 1 is transmitting channel detection reference signals periodically.Each cycle comprises a plurality of frames; In arbitrary frame of one-period, dispensing device is by the part antenna transmission Sounding Reference Signal of terminal; Within one-period, dispensing device each antenna by terminal is transmitting channel detection reference signal in a certain frame at least all.
Optionally, the sending module 11 in the dispensing device 10 is used for carrying out the step S101 of aforementioned arbitrary embodiment.
Fig. 8 shows the structured flowchart of the receiving system in the base station of mobile communications network according to an embodiment of the invention.As shown in the figure, receiving system 20 comprises receiver module 21 and determination module 22, has the data that can communicate by letter between receiver module 21 and the determination module 22 and connects.Receiving system 20 typically is arranged in the base station 3.
In this embodiment, the terminal 1 of communicating by letter with base station 3 has disposed a plurality of antennas.Receiving system 20 is arranged in the base station 3.Wherein, receiver module 21 is used to carry out abovementioned steps S201, the described Sounding Reference Signal of receiving terminal 1 by sending in its a plurality of antennas; Determination module 22 is used to carry out abovementioned steps S202, determines channel condition information according to the described Sounding Reference Signal that receives; Wherein, receiver module 21 receiving terminal 1 in a plurality of frames passes through the described Sounding Reference Signal of its a plurality of antenna transmission; In arbitrary frame in these a plurality of frames, receiver module 21 only receives the Sounding Reference Signal of terminal 1 by a part of antenna transmission in its a plurality of antennas.
According to one embodiment of present invention, the dispensing device 10 in the terminal 1 is transmitting channel detection reference signals periodically, and correspondingly, the receiver module 21 in the receiving system 20 in the base station 3 is the receive channel detection reference signal periodically.Each cycle comprises a plurality of frames; In arbitrary frame of one-period, the receiver module 21 in the base station 3 only receives the Sounding Reference Signal of terminal 1 by its part antenna transmission; Within one-period, the receiver module 21 in the base station 3 receives the Sounding Reference Signal that each antenna sent of terminal 1.
Optionally, the receiver module 21 in the receiving system 20 is used for carrying out the step S201 of aforementioned arbitrary embodiment, and determination module 22 is used to carry out corresponding step S202.
Those skilled in the art will be understood that the foregoing description all is exemplary and nonrestrictive.The different technologies feature that occurs in different embodiment can make up, to obtain beneficial effect.Those skilled in the art will be understood that and realize the embodiment of other variations of the embodiment that disclosed on the basis of research accompanying drawing, specification and claims.In claims, term " comprises " does not get rid of other devices or step; Indefinite article " one " is not got rid of a plurality of; Term " first ", " second " are used to indicate title but not are used to represent any specific order.Any Reference numeral in the claim all should not be understood that the restriction to protection range.The function of a plurality of parts that occur in the claim can be realized by independent hardware or software module.Some technical characterictic appears in the different dependent claims and does not mean that and these technical characterictics can not be made up to obtain beneficial effect.
Claims (14)
1. method that in the terminal of mobile communications network, is used for the transmitting channel detection reference signal, described terminal comprises a plurality of antennas, said method comprising the steps of:
By described a plurality of antennas transmitting channel detection reference signal in a plurality of frames; Wherein in the arbitrary frame in described a plurality of frames, described terminal is only by a part of antenna transmission Sounding Reference Signal in described a plurality of antennas.
2. method according to claim 1 is characterized in that, in each frame of described a plurality of frames, described terminal sends described Sounding Reference Signal according to identical pattern.
3. according to claim 2, it is characterized in that: described pattern is set up first when communicating by letter with described terminal in the base station and is determined.
4. according to each described method in the claim 1 to 3, it is characterized in that: described terminal utilizes one of described a plurality of antennas to send described Sounding Reference Signal with predetermined order in a looping fashion respectively in different frame.
5. method according to claim 4 is characterized in that: described different frame is continuous on time domain.
6. method according to claim 4 is characterized in that: described frame is the tdd frame structure, comprises sub-frame of uplink, special subframe; Described Sounding Reference Signal is arranged in described sub-frame of uplink and/or special subframe.
7. method that in the base station of mobile communications network, is used for the receive channel detection reference signal, the terminal of described mobile communications network comprises a plurality of antennas, said method comprising the steps of:
A. receive described terminal described Sounding Reference Signal by described a plurality of antenna transmission in a plurality of frames; And
B. determine channel condition information according to the described Sounding Reference Signal that receives among the step a;
Wherein, in the arbitrary frame in described a plurality of frames, described base station only receives the Sounding Reference Signal of described terminal by a part of antenna transmission in described a plurality of antennas.
8. method according to claim 7 is characterized in that, in each frame in described a plurality of frames, described base station receives described Sounding Reference Signal according to identical pattern.
9. according to Claim 8, described pattern is set up first when communicating by letter with described terminal in the base station and is determined.
10. according to each described method in the claim 7 to 9, it is characterized in that:
In described step a, in different frame, receive the described Sounding Reference Signal that described terminal utilizes one of described a plurality of antennas to send with predetermined order in a looping fashion respectively.
11. method according to claim 10 is characterized in that: described different frame is continuous on time domain.
12. method according to claim 10 is characterized in that: described frame is the tdd frame structure, comprises sub-frame of uplink, special subframe; Described Sounding Reference Signal is arranged in described sub-frame of uplink and/or special subframe.
13. the dispensing device in the terminal of mobile communications network, described terminal comprises a plurality of antennas, and this dispensing device comprises:
Sending module is used for by described a plurality of antennas transmitting channel detection reference signal in a plurality of frames; Wherein in the arbitrary frame in described a plurality of frames, described sending module is only by a part of antenna transmission Sounding Reference Signal in described a plurality of antennas.
14. the receiving system in the base station of mobile communications network, the terminal of described mobile communications network comprises a plurality of antennas, and this receiving system comprises:
Receiver module is used to receive the described Sounding Reference Signal of described terminal by described a plurality of antenna transmission;
Determination module is used for determining channel condition information according to the described Sounding Reference Signal that receives;
Wherein, described receiver module receives the described Sounding Reference Signal of described terminal by described a plurality of antenna transmission in a plurality of frames; In arbitrary frame in described a plurality of frames, described receiver module only receives the Sounding Reference Signal of described terminal by a part of antenna transmission in described a plurality of antennas.
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