CN102655680B - The method and system of measuring reference signals are sent on a kind of back haul link - Google Patents
The method and system of measuring reference signals are sent on a kind of back haul link Download PDFInfo
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- CN102655680B CN102655680B CN201110050344.XA CN201110050344A CN102655680B CN 102655680 B CN102655680 B CN 102655680B CN 201110050344 A CN201110050344 A CN 201110050344A CN 102655680 B CN102655680 B CN 102655680B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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Abstract
The invention discloses a kind of method that measuring reference signals are sent on back haul link, methods described includes：RN is on the SC FDMA symbols #k of back haul link sub-frame of uplink to network side emission measurement reference signal (SRS)；Wherein, the SC FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is that pre-defined fixed value or configured by network side indicates.The invention also discloses a kind of system for being used to send measuring reference signals on back haul link, the present invention realizes effective transmitting of SRS on back haul link, improves RN transmittings SRS efficiency.
Description
Technical field
The present invention relates to measurement is sent on the relaying technique of wireless communication field, more particularly to a kind of back haul link with reference to letter
Number method and system.
Background technology
As shown in figure 1, in the cordless communication network for introducing relay station (RN, Relay Node), evolved base station (eNB)
Link between macrocell user (M-UE, Macro User Equipment) is referred to as the link (Direct Link) that direct transfers, grand
Cell refers to the cell that eNB is covered and provided service, and the link between eNB and RN is referred to as back haul link, and the interface between eNB and RN is
Un interfaces, the link between RN and relay domain user (R-UE, Relay User Equipment) are referred to as access link (Access
Link)。
In Long Term Evolution (LTE, Long Term Evolution) system, each radio frames are 10ms, include 10 sons
Frame, 1 subframe is 1ms, is divided into 0.5ms 2 time slots (slot), specific as shown in Figure 2.Before frame structure is according to circulation is used
Two classes can be divided into by sewing the type difference of (CP, Cyclic Prefix)：One kind is to use general cyclic prefix (Normal CP)
Subframe structure, each sub-frame of uplink contains 14 single-carrier frequency division multiple access (SC-FDMA, Signal-Carrier
Frequency Division Multiple Access) symbol, include 7 SC-FDMA symbols on each slot, for physics
Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel), subframe structure is as shown in figure 3, demodulation reference
Symbol is symbol #3 and #10, and other symbols are used to carry data；Another kind is to use extended cyclic prefix (Extended CP)
Subframe structure, each sub-frame of uplink contains 12 SC-FDMA symbols, includes 6 SC-FDMA symbols on each slot, for
PUSCH, as shown in figure 4, demodulation reference mark is symbol #2 and #8, other symbols are used to carry data subframe structure.
In LTE system, UE indicates according to eNB configuration, is accorded with last SC-FDMA of the sub-frame of uplink configured
Number upper emission measurement reference signal (SRS, Sounding Reference Symbo1), i.e. during Normal CP, in the symbol of subframe
Launch SRS on number #13, during Extend CP, launch SRS on the symbol #11 of subframe.
Conflict to avoid SRS transmitting from being produced with other up channels when same sub-frame of uplink is launched, SRS transmitting needs
There is certain processing rule.ENB configures cell SRS (Cell specific SRS subframe) in macrocell,
Respective SRS (UE specific SRS subframe) is respectively configured for each user in cell, in Cell specific
On SRS subframe, all Physical Uplink Control Channel (PUCCH, Physical Uplink Control in cell
Channel) format1/1a/1b is using (shorten) structure is truncated, without using last symbol；In cell SRS bandwidth
On, PUSCH is without using last symbol.On UE specific SRS subframe, when this sub-frame of uplink is also simultaneously
During Cell specific SRS subframe, UE launches SRS according to the SRS resource of configuration.When UE needs in same sub-frame of uplink
When launching SRS and PUCCH, UE can indicate according to eNB configuration, abandon launching SRS, only launch to eNB and carried on PUCCH
Information.In LTE system, the information that M-UE can be carried on PUCCH has：Dispatch request (SR, Scheduling request)
With hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat Request) feedback information, i.e. M-UE can be right
The data receiver situation of the descending transmissions of eNB carries out ACK/NACK feedbacks and channel quality reporting, channel quality reporting
Channel quality indicates (CQI, Channel Quality Indicator)/pre-coding matrix instruction (PMI, Precoding
Matrix Index)/order instruction (RI, Rank Index).
For relaying (inband-relay) with interior, i.e., when back haul link and access link use identical frequency resource,
Because inband-relay launching opportunities produce interference (self-interference) to the receiver of oneself, RN is in back haul link and access link
It can not launch or receive simultaneously, can be up (Un of the back haul link configuration instruction for back haul link by network side therefore
UL) subframe and descending (Un DL) subframe, wherein, the sub-frame of uplink and descending sub frame of back haul link are with the model split of time-division, RN
Launched or received using indicated sub-frame of uplink and descending sub frame between back haul link and access link, RN is being configured
Un UL/DL subframes on business datum be not provided serviced to R-UE, and carry out data transmission with eNB.
On back haul link, eNB can configure RN and SRS transmittings are carried out in the way of UE, on the one hand, RN transmittings SRS is necessary
Carried out in Un UL subframes so that the subframe that RN transmittings SRS can be used is limited, on the other hand, between RN and eNB keeps tight
During lattice synchronization, the propagation delay between RN and eNB causes RN possibly can not launch complete Un UL subframes, so that RN is being returned
SRS can not effectively be launched on journey link, cause the measurement of network side can not be normally carried out, so as to have influence on the normal of communication network
Operation.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of method that measuring reference signals are sent on back haul link
And system, to solve the problems, such as that launching SRS on back haul link of the prior art can not effectively realize.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of method that measuring reference signals are sent on back haul link, methods described includes：
Relay station (RN) is on single-carrier frequency division multiple access (SC-FDMA) the symbol #k of back haul link sub-frame of uplink to network side
Emission measurement reference signal (SRS)；
Wherein, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is advance
The fixed value of definition configures instruction by network side.
In such scheme, methods described also includes：To each RN in same cell, pre-define or matched somebody with somebody by network side
The SC-FDMA symbols #k for putting instruction is identical；Or the attribute according to RN, pre-define or referred to by network side configuration respectively
Show the SC-FDMA symbols #k.
In such scheme, methods described also includes：When indicating the SC-FDMA symbols #k by the lateral RN configurations of network,
Network side is that RN configurations indicate the SC-FDMA symbols #k by high-level signaling.
In such scheme, the network side is that RN configurations indicate the k values by high-level signaling, is specially：Network side
Relay station, which is connected, by wireless heterogeneous networks reconfigures the RRCConnectionRNReconfiguration signalings carrying k values
Information, the SC-FDMA symbols #k is indicated for RN configurations.
In such scheme, the attribute of the RN is specially the distance between RN and base station (eNB)；The category according to RN
Property, pre-define or the SC-FDMA symbols #k is indicated by network side configuration, be specially：The distance between eNB and the RN are big
When predefined distance threshold, it is Long Term Evolution to pre-define or configure the SC-FDMA symbols #k indicated by network side
The symbol (LTE SRS symbols) of system emission measurement reference signal；The distance between eNB and the RN no more than it is predefined away from
During from threshold value, pre-define or by network side configure the SC-FDMA symbols #k of instruction in subframe except demodulation reference mark,
And any one symbol outside LTE SRS symbols.
In such scheme, the attribute of the RN is specially the distance between RN and base station (eNB)；
The attribute according to RN, pre-defined for RN or the SC-FDMA symbols #k is indicated by network side configuration, specifically
For：When the distance between eNB and the RN are not less than predefined distance threshold, pre-define or instruction is configured by network side
The SC-FDMA symbols #k is LTE SRS symbols；When the distance between eNB and the RN are less than predefined distance threshold, in advance
First definition is accorded with by the SC-FDMA symbols #k of network side configuration instruction to remove demodulation reference mark and LTE SRS in subframe
Any one symbol outside number.
In such scheme, the predefined distance threshold is 6km or 5km.
In such scheme, the attribute of the RN is specially whether the RN can launch in back haul link sub-frame of uplink
Last SC-FDMA symbol in subframe；
The attribute according to RN, pre-define or the SC-FDMA symbols #k is indicated by network side configuration, be specially：
When the RN can launch last SC-FDMA symbol in subframe in back haul link sub-frame of uplink, the SC-FDMA symbols
Number #k is LTE SRS symbols；The RN can not launch last SC-FDMA in subframe in back haul link sub-frame of uplink
During symbol, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe
Number.
In such scheme, the RN launches on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side
SRS, including：
When the SC-FDMA symbols #k is LTE SRS symbols, present sub-frame be the back haul link sub-frame of uplink and
When by macrocell SRS and being SRS (the RN specific SRS subframe) that RN is configured, the RN is working as
Launch SRS to network side on the SC-FDMA symbols #k of preceding subframe.
In such scheme, the RN launches on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side
SRS, including：
The SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe
Number when, be the back haul link sub-frame of uplink in present sub-frame and when being RN specific SRS subframe, the RN exists
Launch SRS to network side on the SC-FDMA symbols #k of present sub-frame.
In such scheme, methods described also includes：The Physical Uplink Shared Channel that RN and/or macrocell UE are configured
(PUSCH) data are not mapped on the SC-FDMA symbols #k of back haul link sub-frame of uplink, or in back haul link sub-frame of uplink
Un SRS frequency domain bandwidths in the SC-FDMA symbols #k on do not map data.
In such scheme, methods described also includes：It is configured on same back haul link sub-frame of uplink and sends out in the RN
When penetrating SRS and Physical Uplink Control Channel (PUCCH), the RN indicates according to predefined or network side configuration, abandons launching
SRS, only carry out PUCCH transmittings；Or the RN indicates according to predefined or network side configuration, at the same launch SRS and
PUCCH。
In such scheme, methods described also includes：
Network side is that the RN configures SRS resource by high-level signaling so that the RN can use configured SRS to provide
Source, launch SRS to network side on the SC-FDMA symbols #k of back haul link sub-frame of uplink.
Present invention also offers a kind of system for being used to send measuring reference signals on back haul link, the system bag
Include：RN, the RN are used to send out to network side on single-carrier frequency division multiple access (SC-FDMA) the symbol #k of back haul link sub-frame of uplink
Penetrate measuring reference signals (SRS)；
Wherein, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is advance
The fixed value of definition configures instruction by network side.
In such scheme, equipment that the system also includes network side, the equipment of the network side is used for the RN
Configuration indicates the SC-FDMA symbols #k.
In such scheme, the equipment of the network side includes the one or more of following equipment：
Base station (eNB), relay station (RN), cell cooperative entity (MCE), gateway (GW), mobility management apparatus (MME),
Evolved UTRAN (EUTRAN), operational administrative and safeguard (OAM) manager.
In such scheme, the equipment of the network side, for the attribute according to the RN, instruction institute is configured for the RN
State SC-FDMA symbols #k.
In such scheme, the equipment of the network side is eNB, and eNB is used for according to the RN and the distance of itself, for institute
State RN configurations and indicate the SC-FDMA symbols #k.
In such scheme, when the SC-FDMA symbols #k is LTE SRS symbols, the RN is used in present sub-frame
For the back haul link sub-frame of uplink and it is macrocell SRS and when being RN specific SRSs, in present sub-frame
LTE SRS symbols on to network side launch SRS；
And/or the SC-FDMA symbols #k be subframe in addition to demodulation reference mark and LTE SRS symbols appoint
During one symbol of meaning, the RN is for being the back haul link sub-frame of uplink in present sub-frame and being RN specific SRS
During frame, launch SRS to network side on the symbol #k of present sub-frame.
In such scheme, the RN is additionally operable to launch SRS on same back haul link sub-frame of uplink itself is configured in
During with PUCCH, indicated according to pre-defined or network side device configuration, abandon launching SRS, only carry out PUCCH transmitting；Or
Person, SRS and PUCCH are launched according to pre-defined or network side device configuration instruction simultaneously.
SRS sending methods and system provided by the invention, preassigned SC-FDMAs of the RN in back haul link sub-frame of uplink
Launch SRS on symbol, solve RN when back haul link sub-frame of uplink can not launch last symbol, it is impossible to sent out to network side
SRS signal is penetrated, the problem of causing network side to carry out back haul link out-hole run, realizes the effective of SRS on back haul link
Transmitting, improve RN transmittings SRS efficiency.
In addition, the present invention can also reduce conflicting between RN transmitting SRS and UE transmittings SRS.
Brief description of the drawings
Fig. 1 is the network architecture schematic diagram comprising RN；
Fig. 2 is the subframe structure schematic diagram of radio frames；
Fig. 3 is the frame structure schematic diagram that Normal CP are used on PUSCH；
Fig. 4 is the frame structure schematic diagram that Extended CP are used on PUSCH；
Fig. 5 is the composition structural representation for being used on back haul link send SRS system of the present invention；
Fig. 6 is the schematic diagram that the embodiment of the present invention one sends SRS；
Fig. 7 is the schematic diagram that the embodiment of the present invention two sends SRS；
Fig. 8 is the schematic diagram that the embodiment of the present invention three sends SRS；
Fig. 9 is the schematic diagram that the embodiment of the present invention five sends SRS；
Embodiment
The present invention basic thought be：RN is according to predefined or by network side configure instruction and obtain and send out on sub-frame of uplink
Penetrate SRS character position；Afterwards, RN uses the SRS resource configured in the respective symbol of back haul link sub-frame of uplink to network
SRS is launched in side, realizes effective transmitting of SRS on back haul link, improves the emission effciency of SRS on back haul link.
The method that measuring reference signals are sent on a kind of back haul link provided by the invention, mainly includes：RN is in backhaul chain
To network side emission measurement reference signal on the SC-FDMA symbols #k of road sub-frame of uplink；Wherein, the SC-FDMA symbols #k is
Any one symbol in subframe in addition to demodulation reference mark, it can be predefined fixed value or be referred to by network side configuration
Show.
Here, the SC-FDMA symbols #k can be any one SC-FDMA in subframe in addition to demodulation reference mark
Symbol.In practical application, when being shifted using ordinary cycle, i.e., when present sub-frame uses NormalCP, the k values can be set
Any one numerical value in { 0,1,2,4,5,6,7,8,9,11,12,13 }；When being shifted using Extended Cyclic, i.e., present sub-frame is adopted
During with Extend CP, the k values can gather any one numerical value in { 0,1,3,4,5,6,7,9,10,11 }.
Here, by it is predefined or by network side configure instruction RN, phase can be used to each RN in same cell
Same symbol #k, i.e., all RN in same cells launch SRS on the same symbol of back haul link sub-frame of uplink.Or can
It is that the different RN of attribute is pre-defined or by the corresponding SC- of network side configuration instruction respectively with the attribute according to each RN
FDMA symbols #k so as to each RN in same cell, SRS is launched using different symbol #k according to RN attributes, realized
Multiple RN in same cells can launch SRS on the distinct symbols of back haul link sub-frame of uplink.
Here, when obtaining symbol #k by the way of configuring instruction RN using network side, network side is institute by high-level signaling
State RN configurations and indicate the symbol #k, after the RN receives high-level signaling, symbol #k, and root are obtained from the high-level signaling
According to configuration instruction SRS is sent on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side.Preferably, network
Side can use wireless heterogeneous networks connection relay station to reconfigure (RRC Connection RN Reconfiguration) signaling
The symbol #k is indicated for RN configurations.
It is different in the attribute according to RN, when each RN is using different symbol #k transmitting SRS in cell, predefined k values
Or the foundation of the lateral RN configurations instruction k values of network is divided into two classes：
The first kind：RN attribute refers to the distance between RN and base station (eNB), according to distance between RN and eNB, predefine or
The symbol #k is indicated by network side configuration.
Specifically, when the distance between eNB and the RN are more than predefined distance threshold, pre-define or by network side
The SC-FDMA symbols #k of configuration instruction is LTE SRS symbols；The distance between eNB and described RN is no more than predefined
During distance threshold, the SC-FDMA symbols #k for pre-defining or instruction being configured by network side accords with to remove demodulation reference in subframe
Number and LTE SRS symbols outside any one symbol.Preferably, predefined distance threshold is 6km or 5km, by RN and
Propagation delay between eNB determines.
Or the distance between eNB and the RN are pre-defined or by network side when being not less than predefined distance threshold
The SC-FDMA symbols #k of configuration instruction is LTE SRS symbols；The distance between eNB and the RN be less than it is predefined away from
During from threshold value, pre-define or by network side configure the SC-FDMA symbols #k of instruction in subframe except demodulation reference mark,
And any one symbol outside LTE SRS symbols.Preferably, predefined distance threshold is 6km or 5km, by RN and eNB it
Between propagation delay determine.
In practical application, during using predefined mode, RN is judged using predefined according to the distance between itself and eNB
Respective symbol #k to network side launch SRS；By network side be RN configuration indicate the symbol #k when, network side according to eNB with
The distance between RN, corresponding symbol #k is indicated to RN configurations by high-level signaling.
Second class：RN attribute refers to whether RN can launch last in subframe in back haul link sub-frame of uplink
SC-FDMA symbols, now, the attribute according to RN, pre-define or the SC-FDMA symbols # is indicated by network side configuration
K, it is specially；
When RN can launch last SC-FDMA symbol in subframe in back haul link sub-frame of uplink, the SC-
FDMA symbols #k is LTE SRS symbols；RN can not launch last SC-FDMA in subframe in back haul link sub-frame of uplink
During symbol, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe
Number.
In practical application, during using predefined mode, whether RN can launch in back haul link sub-frame of uplink according to itself
Last symbol, judge to launch SRS to network side using predefined respective symbol #k；When configuring instruction by network side, net
Whether network lateral root can launch the last symbol in back haul link sub-frame of uplink according to RN, configured and indicated to RN by high-level signaling
Corresponding symbol #k.
Here, when symbol #k is LTE SRS symbols, it is the back haul link sub-frame of uplink in present sub-frame and is grand
Cell SRS and be network side be RN configuration RN specific SRSs when, LTEs of the RN in present sub-frame
Launch SRS to network side using the SRS resource of configuration on SRS symbols.
When symbol #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe, working as
Preceding subframe be the back haul link sub-frame of uplink and be network side be RN configuration RN specific SRSs when, the RN
Launch SRS to network side on the SC-FDMA symbols #k of present sub-frame.
In practical application, when using ordinary cycle displacement, i.e., for the subframe using Normal CP, the LTE SRS
Symbol is symbol #13；When using Extended Cyclic displacement, i.e., for the subframe using Extend CP, the LTE SRS symbols
For symbol #11.
Here, produced in order to avoid macrocell UE or RN launches PUSCH and RN transmittings SRS on back haul link sub-frame of uplink
Conflict, methods described can also include：According to predefined or configured and indicate by network side, RN and/or macrocell UE PUSCH
Data are not mapped on the symbol #k of back haul link sub-frame of uplink, or in the Un SRS frequency domain bandwidths of back haul link sub-frame of uplink
Symbol #k on do not map data.It is described that data, i.e. macrocell UE PUSCH and/or RN PUSCH are not mapped on symbol #k not
Use symbol #k.
Here, when RN SRS transmittings and PUCCH are configured in same back haul link sub-frame of uplink, the RN is according to predetermined
Rule that is justice or being indicated by the configuration of network side, abandons launching SRS, only carries out PUCCH transmittings；Or while launch SRS and
PUCCH.When making to occur SRS transmittings and conflict with PUCCH transmittings, RN can be configured according to predefined or network side and indicated, only be sent out
Penetrate PUCCH or launch SRS and PUCCH simultaneously, so as to effectively solve collision problem.
Here, methods described also includes：Network side is that the RN configures SRS resource by high-level signaling so that the RN
Configured SRS resource can be used, is launched on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side equipment
SRS.Specifically, network side can use LTE SRS configuration modes, be that RN configures SRS resource by high-level signaling, configuration
SRS resource includes the corresponding frequency domains of SRS, time domain, sequence resources etc..
Accordingly, present invention also offers a kind of system for being used to send measuring reference signals on back haul link, such as Fig. 5
Shown, the system mainly includes：RN, the RN are used for the single-carrier frequency division multiple access (SC- in back haul link sub-frame of uplink
FDMA) on symbol #k to network side emission measurement reference signal (SRS),；Wherein, the SC-FDMA symbols #k is to be removed in subframe
Any one symbol outside demodulation reference mark, it is that pre-defined fixed value or configured by network side indicates.
Wherein, as shown in figure 5, the system can also include：The equipment of network side, the equipment of the network side is for being
The RN configurations indicate the SC-FDMA symbols #k.Specifically, network side is described in RN configuration instructions by high-level signaling
SC-FDMA symbols #k.
Here, the equipment of the network side can include one or more of：Base station (eNB), RN, cell cooperative entity
(MCE, Multi-cell/multicast Coordination Entity), gateway (GW, Gateway), mobile management are set
Standby (MME, Mobility Management Entity), Evolved UTRAN (EUTRAN, E-UTRAN,
Evolved Universal Terrestrial Radio Access Network), operational administrative and safeguard (OAM,
Operation Administration and Maintenance) manager.
Here, the equipment of the network side, it can be used for the attribute according to the RN, for described in RN configuration instructions
SC-FDMA symbols #k.
Specifically, the equipment of the network side is eNB, and eNB is used to, according to the RN and the distance of itself, for the RN match somebody with somebody
Put the instruction SC-FDMA symbols #k.
Here, when the SC-FDMA symbols #k is LTE SRS symbols, the RN is used to return to be described in present sub-frame
Journey link sub-frame of uplink and it is macrocell SRS and when being RN specific SRSs, in the LTE of present sub-frame
Launch SRS to network side on SRS symbols；And/or the SC-FDMA symbols #k be in subframe except demodulation reference mark and
During any one symbol outside LTE SRS symbols, the RN be used for present sub-frame be the back haul link sub-frame of uplink and
For RN specific SRSs when, on the symbol #k of present sub-frame to network side launch SRS.
Here, the RN, it is additionally operable to launch SRS and PUCCH on same back haul link sub-frame of uplink itself is configured in
When, indicated according to pre-defined or network side device configuration, abandon launching SRS, only carry out PUCCH transmitting；Or according to
Pre-defined or network side device configuration instruction launches SRS and PUCCH simultaneously.
In Examples below explanation, using eNB as network side, illustrated exemplified by Normal CP, Extend CP similarly may be used
.
In practical application, can be same cell in all RN using identical symbol #k launch SRS, using symbol #12 as
Example, detailed process are：All RN launch SRS on symbol #12 in predefined current area, or pass through high-level signaling by eNB
All RN launch SRS on symbol #12 in indicating cell.ENB uses LTE SRS configuration mode, is small by high-level signaling
Corresponding SRS resource, including time domain, frequency domain, sequence resources etc. are respectively configured in each RN in area.RN according to eNB configuration indicate,
It is RN specific SRSs simultaneously and when being back haul link sub-frame of uplink in present sub-frame, in the symbol #12 of the subframe
On, launch SRS to eNB using the SRS resource that eNB is configured.Here, when RN is using symbol #12 transmitting SRS, if respective tones
There are PUSCH transmittings in the bandwidth of domain, be then likely to form conflict, therefore, for being configured in Un SRS frequency domain bandwidth (be cell
The back haul link SRS total bandwidths of interior all RN configurations), PUSCH can not map carrying data, stet #12 on symbol #12
For Un SRS, conflict so as to avoid Un SRS transmittings from being produced with PUSCH transmittings.Here, the PUSCH in Un SRS frequency domain bandwidths
Resource can be allocated to RN, can also be allocated to macrocell LTE-A UE, when being configured to LTE-A UEPUSCH resources, eNB instructions
The Un SRS frequency domain bandwidths that LTE-A UE are configured by RN, enable LTE-AUE to be kept in corresponding Un SRS frequency domain bandwidths
PUSCH maps carrying data not on symbol #12, avoids conflicting with Un SRS transmitting generations.Or by predefined or network
Side configuration instruction, RNPUSCH and macrocell LTE-A UE PUSCH are on back haul link sub-frame of uplink, without using symbol #12, i.e.,
Not to mapping data on symbol #12 in the PUSCH resources of configuration.
Can be that each RN in same cell is used to launch SRS using different symbol #k, with symbol in practical application
Illustrated exemplified by number #12.
For first kind situation, according to the difference of distance between RN and eNB, symbol #k is different, distance threshold=6km.
Detailed process is：According to RN and eNB distance, when using predefined mode, RN is according to itself between eNB
Distance, judge using predefined respective symbol #k to network side launch SRS；When configuring instruction by network side, network side
According to the distance between eNB and RN, corresponding symbol #k is indicated to RN configurations by high-level signaling.
The distance between eNB and RN are more than or (are referred to as A class RN) during more than or equal to 6km, and RN is sent out using symbol #13 to eNB
Penetrate SRS；The distance between eNB and RN are not more than or (are referred to as B class RN) during less than 6km, and RN is launched using symbol #12 to eNB
SRS。
ENB use LTE SRS configuration mode, by high-level signaling be cell in RN configure SRS resource, including time domain,
Frequency domain, sequence resources.B classes RN is in the RN specific SRSs configured while when being back haul link sub-frame of uplink, herein
On the symbol #12 of subframe, configured resource is used to launch SRS to eNB.Here, because B classes RN is launched using symbol #12
SRS, may launch to be formed with PUSCH and conflict, therefore in the frequency domain bandwidth of the Un SRS for being allocated to B classes RN, macrocell
LTE-A UE and other RN PUSCH maps carrying data not on symbol #12, and stet #12 is used for Un SRS, so as to keep away
Exempt to produce between Un SRS transmittings are launched with PUSCH data and conflict.
For A class RN, because A classes RN launches SRS on symbol #13, as LTE SRS, therefore, A classes RN SRS matches somebody with somebody
Put and radiation pattern is consistent with LTE UE SRS.ENB by high-level signaling be A classes RN configure SRS resource, including time domain, frequency domain,
Sequence resources.A classes RN is simultaneously RN specific SRSs in present sub-frame, and is back haul link sub-frame of uplink and is grand
During cell SRS (Cell specific SRS) subframe, on the symbol #13 of the subframe, configured SRS resource is used to eNB
Launch SRS.
The specific implementation that SRS processes are sent on back haul link is elaborated below.
Embodiment one
In the present embodiment, the process that SRS on back haul link is sent is realized, idiographic flow is as follows：
Step 1：All RN launch SRS using symbol #12 to eNB in predefined cell；
Step 2：ENB is that each RN configures SRS resource in cell by high-level signaling；
Specifically, eNB uses LTE SRS configuration parameter, is that RN configures SRS resource in cell by high-level signaling；This
In, the SRS resource configured can include：RN SRSs (RN specific SRS subframe), back haul link SRS bands
Wide (Un SRS bandwidth), RN specific SRS bandwidth, SRS frequency hoppings (SRS hopping) configuration, SRS frequency domain positions, SRS sequences
Time domain, frequency domain, the sequence resources such as row pectinate texture parameter, SRS pilot frequency sequences cyclic shift, SRS configuration effective times etc..
Step 3：The SRS resource that RN configures according to eNB, it is simultaneously back haul link sub-frame of uplink in present sub-frame, and RN
During specific SRSs, distributed SRS resource is used, launches SRS to eNB on present sub-frame symbol #12.
Here, as shown in fig. 6, due in cell all RN Un SRS bandwidth is obtained by the eNB SRS resources configured,
When then RN launches PUSCH in Un SRS bandwidth, data are not mapped on the symbol #12 of the PUSCH resources configured, so as to keep away
When having exempted from RN transmitting PUSCH, produce and conflict with other RN transmittings SRS.
Embodiment two
In the present embodiment, the process that SRS on back haul link is sent is realized, idiographic flow is as follows：
Step 1：By high-level signaling, all RN configurations instructions into cell launch SRS to eNB on symbol #12；
Step 2：Identical with the step 2 of embodiment one, eNB is that each RN configures SRS resource in cell by high-level signaling；Separately
Outside, eNB also indicates Un SRS bandwidth informations for macrocell LTE-A UE.
Step 3：The SRS resource that RN configures according to eNB, it is simultaneously back haul link sub-frame of uplink in present sub-frame, and RN
During specific SRSs, distributed SRS resource is used, launches SRS to eNB on present sub-frame symbol #12.
In the present embodiment, as shown in fig. 7, because all RN in cell and macrocell LTE-A UE obtain Un SRS bandwidth
Information, then when RN and LTE-A UE launch PUSCH in Un SRS bandwidth, on the symbol #12 of the PUSCH resources configured not
Map data, with avoid RN and LTE-A UE launch PUSCH data when, with other RN transmitting SRS produce conflict.
Here, step 1 and step 2 can be carried out simultaneously, can also be separated and be carried out, eNB can pass through same high-level signaling
SRS resource and the configuration process of the configuration information for indicating to launch on symbol #12 SRS on RN are realized, can also be passed through
Different high-level signalings realizes SRS resource configuration process on RN and launches matching somebody with somebody for SRS on symbol #12 for instruction respectively
The configuration process of confidence breath.
Embodiment three
In the present embodiment, the process that SRS on back haul link is sent is realized, idiographic flow is as follows：
Step 1：RN and eNB spacing is more than the A classes RN of pre-defined distance threshold in symbol #13 in predefined cell
Upper transmitting SRS, launch SRS on symbol #12 with the eNB B classes RN for being smaller than being equal to distance threshold；
Here, the distance threshold is brought according to distance between RN and eNB propagation delay determines, in practical application,
Typically the distance threshold can be set as 6km.
Step 2：ENB is respectively the A class RN and B classes RN configuration SRS resources in current area；In addition, eNB is also to be grand
Cell LTE-A UE indicate Un SRS bandwidth informations,
Step 3：The SRS resource that RN configures according to eNB, launch SRS to eNB on back haul link sub-frame of uplink.
Specifically, A classes RN uses the SRS resource that eNB is distributed in cell, is RNspecific SRS in present sub-frame
Frame and when being back haul link sub-frame of uplink and when being macrocell SRS, to eNB on the symbol #13 of current sub-frame of uplink
Launch SRS；B classes RN uses the SRS resources distributed of eNB in cell, present sub-frame be RN specific SRSs, it is same
When being back haul link sub-frame of uplink, launch SRS to eNB on the symbol #12 of present sub-frame.
In the present embodiment, as shown in figure 8, B classes RN and macrocell LTE-A UE obtain Un SRS bandwidth informations, then RN and
When LTE-A UE launch PUSCH in Un SRS bandwidth, data are not mapped on the symbol #12 of the PUSCH resources configured, with
When avoiding RN and LTE-A UE transmitting PUSCH data, produce and conflict with other RN transmittings SRS.A classes RN according to eNB configuration, with
Macrocell UE SRS frequency domain bandwidths are identical, and A classes RN launches SRS on the symbol #13 of back haul link sub-frame of uplink to eNB.
Example IV
In the present embodiment, the process that SRS on back haul link is sent is realized, idiographic flow is as follows：
Step 1：All RN launch SRS using symbol #12 to eNB in predefined cell, and predefined：If RN is configured
Launch SRS and PUCCH in same subframe, then abandon SRS transmitting, only launch PUCCH；
Step 2：It is identical with the step 2 of embodiment one；
Step 3：RN is configured according to eNB SRS resource and indicated, the SRS resource distributed using eNB, on back haul link
When row subframe need not report PUCCH data, launch SRS to eNB.
Specifically, present sub-frame is RN specific SRSs and when being back haul link sub-frame of uplink, if worked as
It need not launch PUCCH to eNB on preceding sub-frame of uplink, then the SRS resource of eNB configurations is used on the symbol #12 of present sub-frame
Launch SRS to eNB；If RN needs to launch PUCCH to eNB on current sub-frame of uplink, abandoned on current sub-frame of uplink
SRS transmitting, only launch PUCCH to eNB.
Embodiment five
In the present embodiment, the process that SRS on back haul link is sent is realized, idiographic flow is as follows：
Step 1：All RN launch SRS using symbol #12 to eNB in predefined cell, and pre-defined：According to eNB's
Configuration instruction, when RN is needing to launch SRS and PUCCH in same subframe, while launch SRS and PUCCH to eNB；
Step 2：It is identical with the step 2 of embodiment one；
Step 3：RN uses the SRS resource that eNB is distributed, and launches on the symbol #12 of back haul link sub-frame of uplink to eNB
SRS。
Specifically, as shown in figure 9, present sub-frame is RN specific SRSs and is back haul link sub-frame of uplink
When, if on current sub-frame of uplink PUCCH need not be launched to eNB, matched somebody with somebody on the symbol #12 of present sub-frame using eNB
The SRS resource put launches SRS to eNB；If RN needs to launch PUCCH to eNB on current sub-frame of uplink, according to eNB's
Configuration, RN launch SRS and PUCCH to eNB simultaneously on current sub-frame of uplink.
It should be noted that above-described embodiment one arrives the implementation process of embodiment five, use similarly may apply to
Extend CP subframe, specific implementation process is similar, will not be repeated here.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (25)
1. the method for measuring reference signals is sent on a kind of back haul link, it is characterised in that methods described includes：
Relay station RN is on the single-carrier frequency division multiple access SC-FDMA symbols #k of back haul link sub-frame of uplink to network side emission measurement
Reference signal SRS；
Wherein, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is pre-defined
Fixed value or by network side configure indicate；
To each RN in same cell, the SC-FDMA symbols #k for pre-defining or instruction being configured by network side is identical；
It is pre-defined or referred to by network side configuration or the distance between eNB and the RN be when being more than predefined distance threshold
The SC-FDMA symbols #k shown is the symbol LTE SRS symbols of long evolving system emission measurement reference signal；
When the distance between eNB and the RN are not more than predefined distance threshold, pre-define or instruction is configured by network side
The SC-FDMA symbols #k be any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe；
It is pre-defined or configured by network side or the distance between eNB and the RN be when being not less than predefined distance threshold
The SC-FDMA symbols #k indicated is the symbol LTE SRS symbols of long evolving system emission measurement reference signal；
When the distance between eNB and the RN are less than predefined distance threshold, pre-define or instruction is configured by network side
The SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe.
2. the method for measuring reference signals is sent on back haul link according to claim 1, it is characterised in that methods described is also
Including：
When indicating the SC-FDMA symbols #k by the lateral RN configurations of network, network side configures instruction institute by high-level signaling for RN
State SC-FDMA symbols #k.
3. the method for measuring reference signals is sent on back haul link according to claim 2, it is characterised in that the network side
It is that RN configurations indicate the k values by high-level signaling, is specially：
Network side connects relay station by wireless heterogeneous networks and reconfigures RRCConnectionRNReconfiguration signalings
The k value informations are carried, the SC-FDMA symbols #k is indicated for RN configurations.
4. the method for measuring reference signals is sent on back haul link according to claim 1, it is characterised in that described predefined
Distance threshold be 6km or 5km.
5. according to the method that measuring reference signals are sent on any one of Claims 1-4 back haul link, it is characterised in that
The RN launches SRS on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side, including：
When the SC-FDMA symbols #k is LTE SRS symbols, it is the back haul link sub-frame of uplink in present sub-frame and is grand
Cell SRS and during the SRS RN specific SRS subframe configured by RN, the RN is in present sub-frame
SC-FDMA symbols #k on to network side launch SRS.
6. according to the method that measuring reference signals are sent on any one of Claims 1-4 back haul link, it is characterised in that
The RN launches SRS on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side, including：
The SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe
When, it is the back haul link sub-frame of uplink in present sub-frame and when being RN specific SRS subframe, the RN is working as
Launch SRS to network side on the SC-FDMA symbols #k of preceding subframe.
7. according to the method that measuring reference signals are sent on any one of Claims 1-4 back haul link, it is characterised in that
Methods described also includes：
The SC-s of the Physical Uplink Shared Channel PUSCH that RN and/or macrocell UE are configured in back haul link sub-frame of uplink
Data, or the SC-FDMA symbols in the Un SRS frequency domain bandwidths of back haul link sub-frame of uplink are not mapped on FDMA symbols #k
Data are not mapped on number #k.
8. according to the method that measuring reference signals are sent on any one of Claims 1-4 back haul link, it is characterised in that
Methods described also includes：
When the RN is configured in and launches SRS and Physical Uplink Control Channel PUCCH on same back haul link sub-frame of uplink, institute
State RN to be indicated according to predefined or network side configuration, abandon launching SRS, only carry out PUCCH transmittings；Or the RN according to
Predefined or network side configuration instruction, while launch SRS and PUCCH.
9. according to the method that measuring reference signals are sent on any one of Claims 1-4 back haul link, it is characterised in that
Methods described also includes：
Network side is that the RN configures SRS resource by high-level signaling so that the RN can use configured SRS resource,
Launch SRS to network side on the SC-FDMA symbols #k of back haul link sub-frame of uplink.
10. the method for measuring reference signals is sent on a kind of back haul link, it is characterised in that methods described includes：
Relay station RN is on the single-carrier frequency division multiple access SC-FDMA symbols #k of back haul link sub-frame of uplink to network side emission measurement
Reference signal SRS；
Wherein, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is pre-defined
Fixed value or by network side configure indicate；
When the RN can launch last SC-FDMA symbol in subframe in back haul link sub-frame of uplink, the SC-
FDMA symbols #k is LTE SRS symbols；
When the RN can not launch last SC-FDMA symbol in subframe in back haul link sub-frame of uplink, the SC-
FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe.
11. the method for measuring reference signals is sent on back haul link according to claim 10, it is characterised in that methods described
Also include：
When indicating the SC-FDMA symbols #k by the lateral RN configurations of network, network side configures instruction institute by high-level signaling for RN
State SC-FDMA symbols #k.
12. the method for measuring reference signals is sent on back haul link according to claim 11, it is characterised in that the network
Side is that RN configurations indicate the k values by high-level signaling, is specially：
RRCConnectionRNReconfiguration signalings carry the k value informations, and the SC-FDMA is indicated for RN configurations
Symbol #k.
13. according to the method that measuring reference signals are sent on any one of claim 10 to 12 back haul link, its feature exists
In, the RN launches SRS on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side, including：
When the SC-FDMA symbols #k is LTE SRS symbols, it is the back haul link sub-frame of uplink in present sub-frame and is grand
Cell SRS and during the SRS RN specific SRS subframe configured by RN, the RN is in present sub-frame
SC-FDMA symbols #k on to network side launch SRS.
14. according to the method that measuring reference signals are sent on any one of claim 10 to 12 back haul link, its feature exists
In, the RN launches SRS on the SC-FDMA symbols #k of back haul link sub-frame of uplink to network side, including：
When the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe,
It is the back haul link sub-frame of uplink in present sub-frame and when being RN specific SRS subframe, the RN is current
Launch SRS to network side on the SC-FDMA symbols #k of subframe.
15. according to the method that measuring reference signals are sent on any one of claim 10 to 12 back haul link, its feature exists
In methods described also includes：
The SC-s of the Physical Uplink Shared Channel PUSCH that RN and/or macrocell UE are configured in back haul link sub-frame of uplink
Data, or the SC-FDMA symbols in the Un SRS frequency domain bandwidths of back haul link sub-frame of uplink are not mapped on FDMA symbols #k
Data are not mapped on number #k.
16. according to the method that measuring reference signals are sent on any one of claim 10 to 12 back haul link, its feature exists
In methods described also includes：
When the RN is configured in and launches SRS and Physical Uplink Control Channel PUCCH on same back haul link sub-frame of uplink, institute
State RN to be indicated according to predefined or network side configuration, abandon launching SRS, only carry out PUCCH transmittings；Or the RN according to
Predefined or network side configuration instruction, while launch SRS and PUCCH.
17. according to the method that measuring reference signals are sent on any one of claim 10 to 12 back haul link, its feature exists
In methods described also includes：
Network side is that the RN configures SRS resource by high-level signaling so that the RN can use configured SRS resource,
Launch SRS to network side on the SC-FDMA symbols #k of back haul link sub-frame of uplink.
18. a kind of system for being used to send measuring reference signals on back haul link, it is characterised in that the system includes：RN
And eNB, the RN are used to network side launch on the single-carrier frequency division multiple access SC-FDMA symbols #k of back haul link sub-frame of uplink
Measuring reference signals SRS；
The eNB is used for according to the RN and the distance of itself, and the SC-FDMA symbols #k is indicated for RN configurations；
Wherein, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is pre-defined
Fixed value or by network side configure indicate；
To each RN in same cell, the SC-FDMA symbols #k for pre-defining or instruction being configured by network side is identical；
It is pre-defined or referred to by network side configuration or the distance between eNB and the RN be when being more than predefined distance threshold
The SC-FDMA symbols #k shown is the symbol LTE SRS symbols of long evolving system emission measurement reference signal；
When the distance between eNB and the RN are not more than predefined distance threshold, pre-define or instruction is configured by network side
The SC-FDMA symbols #k be any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe；
It is pre-defined or configured by network side or the distance between eNB and the RN be when being not less than predefined distance threshold
The SC-FDMA symbols #k indicated is the symbol LTE SRS symbols of long evolving system emission measurement reference signal；
When the distance between eNB and the RN are less than predefined distance threshold, pre-define or instruction is configured by network side
The SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe.
19. it is used for the system that measuring reference signals are sent on back haul link according to claim 18, it is characterised in that
When the SC-FDMA symbols #k is LTE SRS symbols, it is that the back haul link is up that the RN, which is used in present sub-frame,
Subframe and be macrocell SRS and when being RN specific SRSs, on the LTE SRS symbols of present sub-frame to
Network side launches SRS；
And/or the SC-FDMA symbols #k be subframe on it is any one in addition to demodulation reference mark and LTE SRS symbols
During individual symbol, the RN is for being the back haul link sub-frame of uplink in present sub-frame and being RN specific SRSs
When, launch SRS to network side on the symbol #k of present sub-frame.
20. it is used for the system that measuring reference signals are sent on back haul link according to claim 18, it is characterised in that institute
RN is stated, is additionally operable to when launching SRS and PUCCH on itself being configured in same back haul link sub-frame of uplink, according to pre-defined
Or the device configuration instruction of network side, abandon launching SRS, only carry out PUCCH transmitting；Or according to pre-defined or network
The device configuration instruction of side launches SRS and PUCCH simultaneously.
21. a kind of system for being used to send measuring reference signals on back haul link, it is characterised in that the system includes：RN,
The RN is used to network side emission measurement join on the single-carrier frequency division multiple access SC-FDMA symbols #k of back haul link sub-frame of uplink
Examine signal SRS；
Wherein, the SC-FDMA symbols #k is any one symbol in addition to demodulation reference mark in subframe, is pre-defined
Fixed value or by network side configure indicate；
When the RN can launch last SC-FDMA symbol in subframe in back haul link sub-frame of uplink, the SC-
FDMA symbols #k is LTE SRS symbols；
When the RN can not launch last SC-FDMA symbol in subframe in back haul link sub-frame of uplink, the SC-
FDMA symbols #k is any one symbol in addition to demodulation reference mark and LTE SRS symbols in subframe.
22. it is used for the system that measuring reference signals are sent on back haul link according to claim 21, it is characterised in that institute
Stating system also includes the equipment of network side, and the equipment of the network side is used to indicate the SC-FDMA symbols # to RN configurations
k。
23. it is used for the system that measuring reference signals are sent on back haul link according to claim 22, it is characterised in that institute
Stating the equipment of network side includes the one or more of following equipment：
Base station (eNB), relay station (RN), cell cooperative entity (MCE), gateway (GW), mobility management apparatus (MME), evolution
Type universal land radio access web (EUTRAN), operational administrative and safeguard (OAM) manager.
24. it is used for the system that measuring reference signals are sent on back haul link according to claim 21, it is characterised in that
When the SC-FDMA symbols #k is LTE SRS symbols, it is that the back haul link is up that the RN, which is used in present sub-frame,
Subframe and be macrocell SRS and when being RN specific SRSs, on the LTE SRS symbols of present sub-frame to
Network side launches SRS；
And/or the SC-FDMA symbols #k be subframe on it is any one in addition to demodulation reference mark and LTE SRS symbols
During individual symbol, the RN is for being the back haul link sub-frame of uplink in present sub-frame and being RN specific SRSs
When, launch SRS to network side on the symbol #k of present sub-frame.
25. it is used for the system that measuring reference signals are sent on back haul link according to claim 21, it is characterised in that institute
RN is stated, is additionally operable to when launching SRS and PUCCH on itself being configured in same back haul link sub-frame of uplink, according to pre-defined
Or the device configuration instruction of network side, abandon launching SRS, only carry out PUCCH transmitting；Or according to pre-defined or network
The device configuration instruction of side launches SRS and PUCCH simultaneously.
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| CN201110050344.XA CN102655680B (en) | 2011-03-02 | 2011-03-02 | The method and system of measuring reference signals are sent on a kind of back haul link |
| PCT/CN2011/084065 WO2012116568A1 (en) | 2011-03-02 | 2011-12-15 | Method and system for sending sounding reference signal on backhaul link |
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| CN107026724B (en) | 2016-02-02 | 2021-09-24 | 北京三星通信技术研究有限公司 | Method for sending and receiving signal and user equipment |
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| CN101500242A (en) * | 2008-02-01 | 2009-08-05 | 大唐移动通信设备有限公司 | Method and apparatus for configuring uplink detection reference signal |
| CN101547022A (en) * | 2008-03-26 | 2009-09-30 | 三星电子株式会社 | Method and device for sending SRS in LTE TDD system |
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| CN101868027A (en) * | 2009-04-17 | 2010-10-20 | 大唐移动通信设备有限公司 | Configuration and sending method of uplink signal transmission resource, base station and user terminal |
| CN101541085B (en) * | 2009-04-27 | 2015-06-03 | 中兴通讯股份有限公司 | Sending and using method of measure-reference signals |
| CN101808409B (en) * | 2010-04-01 | 2015-03-25 | 中兴通讯股份有限公司 | Method and system for configuration of measurement reference signals in LTE-A system |
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| CN101547022A (en) * | 2008-03-26 | 2009-09-30 | 三星电子株式会社 | Method and device for sending SRS in LTE TDD system |
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