CN103944665A

CN103944665A - Uplink DMRS transmitting method, device and system/ Transmitting method, device and system used for uplink DMRS

Info

Publication number: CN103944665A
Application number: CN201310020112.9A
Authority: CN
Inventors: 王瑜新; 关艳峰; 孙云锋; 陈艺戬; 李书鹏; 陈宪明; 罗薇
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-01-18
Filing date: 2013-01-18
Publication date: 2014-07-23
Anticipated expiration: 2033-01-18
Also published as: WO2014110928A1; CN103944665B

Abstract

The invention relates to the field of communication, provides an uplink DMRS (Demodulation Reference Signal) transmitting method, device and system and solves the problem that the time-frequency resource overhead of the uplink demodulation reference signal is excessive. The method comprises the steps that a base station configures a resource, a pattern or a parameter set required for transmitting the uplink DMRS for a user terminal; and the base station transmits or indicates the resource, the pattern or the parameter set required for transmitting the uplink DMRS to the user terminal via a bit domain or a high-level signaling of downlink control information. The resource, the pattern or the parameter set comprises a time domain position, a frequency domain position, a subframe configuration or a cycle, and a hopping mode. The technical scheme is applicable to a long term evolution system, and an uplink DMRS transmitting mechanism with the low time-frequency resource overhead is realized.

Description

Sending method, device and the system of uplink demodulation reference signal

Technical field

The present invention relates to the communications field, be specifically related to sending method, device and the system of a kind of uplink demodulation reference signal (Demodulation Reference Signal, referred to as DMRS).

Background technology

Long evolving system (LTE, Long Term Evolution) uplink physical channel comprise Physical Random Access Channel (PRACH, Physical Random Access Channel), Physical Shared Channel (PUSCH, Physical uplink shared channel), Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel).Uplink scheduling information (Uplink Scheduling Information) to PUSCH passes through Physical Downlink Control Channel (Physical Downlink Control Channel by base station, referred to as PDCCH) send to target terminal user (UE, User Equipment).Uplink scheduling information comprises: the control informations such as resource distribution, modulation and the encoding scheme that Physical Uplink Shared Channel is relevant, the cyclic shift of DMRS (Cyclic Shift).

In LTE system, Physical Uplink Shared Channel adopts single antenna port transmission.A system-frame (frame) comprises 10 subframes (subframe), and each subframe comprises 2 time slots (slot).Fig. 1 is according to the schematic diagram of the regular circulation prefix in correlation technique time slot, as shown in Figure 1, for regular circulation prefix (Normal cyclic prefix, referred to as Normal CP), each time slot is made up of 6 data symbols and 1 demodulated reference signal.Fig. 2 is according to the schematic diagram of the extended cyclic prefix in correlation technique time slot, and for extended cyclic prefix (Extended cyclic prefix, referred to as ExtendedCP), each time slot is made up of 5 data symbols and 1 demodulated reference signal.

Demodulated reference signal DM RS is made up of a sequence on frequency domain, the cyclic shift that this sequence is reference signal sequence.For randomize inter-cell interference, the reference signal sequence of demodulated reference signal configures according to base station, can realize the SGH mode that timeslot-based sequence redirect (Sequence hopping) or sequence set redirect (Sequence Group Hopping is called for short SGH) also can be called time slot redirect.,, according to base station configuration, subscriber equipment demodulated reference signal on two time slots in a subframe is different, changes in a system-frame according to certain redirect pattern with time slot.

At time slot n _sin, the cyclic shift amount α of demodulated reference signal is: α=2 π n _cs/ 12, wherein,

n_{cs} = (n_{DMRS}^{(1)} + n_{DMRS}^{(2)} + n_{PRS} (n_{cs})) \mod 12 .

In a radio frames, n _cs=0,1 ..., 19; configured by higher level parameters, configured n by uplink scheduling information _pRS(n _cs) generated by pseudo-random generator, be along with time slot n _sthe parameter changing, is specifically expressed as

n_{PRS} (n_{cs}) = Σ_{i = 0}^{7} c ({8 N}_{symb}^{UL} \cdot n_{s} + i) \cdot 2^{i},

In each radio frames initialization once, initial condition is pseudo random sequence generator initialization value is relevant with affiliated community ID, is the proprietary parameter in community.

Uplink scheduling information is carried on Physical Downlink Control Channel, sends to target UE with certain descending control information format (Downlink Control Informationformat, referred to as DCIformat) by base station.In LTE system, descending control information format is divided into following several: DCIformat0,1,1A, 1B, 1C, 1D, 2,2A, 3, and 3A etc., wherein, DCIformat0 comprises uplink scheduling information, is used to indicate the scheduling of Physical Uplink Shared Channel PUSCH.

LTE-Advanced system (being called for short LTE-A system) is the evolution system of future generation of LTE system.In LTE-A system, Physical Uplink Shared Channel can adopt single antenna port transmission, also can adopt many antenna port transmission.Fig. 3 is the schematic diagram that the LTE-A system of correlation technique adopts the transmitting terminal base band signal process of the Physical Uplink Shared Channel of many antenna port transmission, as shown in Figure 3, in the time of many antenna port transmission, LTE-A system is supported based on one or two code word (Codeword, referred to as CW) spatial reuse, the corresponding transmission block of each code word (Transport Block, referred to as TB).Fig. 4 is the mapping schematic diagram that the up code word of the LTE-A system of correlation technique arrives layer, and as shown in Figure 4, code word will further be mapped to layer (layer), and each code word is mapped as one deck or two layer data.

LTE-A adopts based on code book (Codebook, be called again code book) Linear Precoding (Precoding), precoding technique is that one utilizes channel condition information (Channel Status Information, referred to as CSI), at transmitting terminal, signal is carried out to preliminary treatment to improve the technology of multiaerial system performance.A kind of approach that transmitting terminal obtains CSI is the feedback by receiving terminal.In order to reduce feedback overhead, the general mode adopting is to preserve identical code book at receiving terminal and transmitting terminal.Receiving terminal is according to current channel conditions, in code book, select applicable pre-coding matrix and (Precoding Matrix Index of index value in set by it, referred to as PMI) feed back to transmitting terminal, transmitting terminal finds pre-coding matrix according to the pre-coding matrix index of feedback, and transmitted signal is carried out to precoding.The Mathematical Modeling of data precoding is y=HWs+n, and wherein, y is for receiving signal phasor, and H is channel coefficient matrix, and W is pre-coding matrix, and s is signal phasor, and n is noise vector.

In LTE-A system, in the time that Physical Uplink Shared Channel adopts many antenna port transmission, the DMRS of each layer data equally carries out precoding with each layer data.And the demodulated reference signal of different layers data, comprise the demodulated reference signal of the multi-layer data to the same subscriber equipment of alone family multi-input multi-output system (SU-MIMO), and the demodulated reference signal of the multi-layer data of the multiple subscriber equipmenies of multiuser mimo system (MU-MIMO), by using different demodulated reference signal cyclic shifts (CS) and/or orthogonal mask (Orthogonal Cover Code, referred to as OCC) carry out orthogonalization, to distinguish the multiplexing different layers data of user's space or to distinguish different users.Wherein, orthogonal mask OCC is [+1 ,+1] and [+1 ,-1], acts on the demodulated reference signal on interior two time slots of a subframe (Subframe) (Slot).

At present, in the Standard Edition of formulating at 3GPP, the version of LTE standard is the 8th edition (Release8) and the 9th edition (Release9), the version of LTE-A standard is the 10th edition (Release10) and the 11st edition (Release11), be abbreviated as respectively Rel-8, Rel-9, Rel-10 and Rel-11, LTE-A standard may also comprise later release, such as Rel-12.In Rel-11 version, the cyclic shift/OCC information for the demodulated reference signal of dispatched PUSCH can be indicated by DCIformat0 and DCIformat4 in base station, as shown in table 1 at present.

The cyclic shift region of the up associated DC Iformat of table 1 [w ^(λ)(0) w ^(λ)(1)] mapping table

In the time using orthogonal mask OCC to demodulated reference signal orthogonalization, joint-detection need to be carried out to the demodulated reference signal on two time slots in a subframe in base station, thereby to require subscriber equipment demodulated reference signal on two time slots in a subframe must be the same.In this case, can not use the SGH mode of time slot redirect in LTE system.But for randomize inter-cell interference as far as possible, the SGH mode of subframe redirect is proposed in correlation technique.; configure according to base station; subscriber equipment demodulated reference signal on two time slots in a subframe is the same, and the demodulated reference signal in a system-frame in each subframe is different, changes in a system-frame according to certain redirect pattern with subframe.

Along with the increase of user to mobile data services demand, the transmittability of mobile communications network is proposed to severe challenge.At present the overwhelming majority of mobile data services amount occurs in small-cell (Small Cell), and this ratio also will continue growth, and therefore, operator is in the urgent need to the data service solution of the small-cell covering of two-forty.And the delay expansion environmental change less, wireless channel of the feature of small-cell to be user be generally fixed-line subscriber or user that very low speed moves, wireless channel is slower, in addition, data service is mainly internet protocol-based (Internet Procotol, be called for short IP) business, less demanding to transmission delay, but having relatively high expectations to data rate.And the design of LTE/LTE-A system at present can adapt to time delay ratio greatly and wireless channel changes ratio scene faster, upstream data for small-cell sends, if continue to use the sending method of current LTE/LTE-A system, can bring the problem that efficiency of transmission is on the low side, DMRS expense is excessive.Therefore, in prior art, there is the excessive problem of uplink demodulation reference signal resource overhead.

Summary of the invention

The invention provides a kind of sending method, device and system of uplink demodulation reference signal, solved the excessive problem of running time-frequency resource expense of uplink demodulation reference signal.

A sending method for uplink demodulation reference signal, comprising:

Base station is that user terminal configuration sends required resource or pattern (pattern) or the parameter set of up DMRS, and described resource or pattern or parameter set comprise:

Time-domain position, frequency domain position, sub-frame configuration or cycle, redirect mode;

The bit field of described base station by Downlink Control Information or high-level signaling by resource required up described transmission DMRS or pattern parameter set sends or instruction to user terminal.

Preferably, when described Downlink Control Information is described in continuous M subframe rise degree when user terminal, the time-domain position of described up DMRS is specially:

Described DMRS is in the 1st subframe and/or last 1 subframe and/or the individual subframe of ceil (M/2) and/or ceil (M/2)+1 subframe of a described M subframe, and wherein, M is integer, and ceil () represents to round up.

Preferably, in the time that up symbol cyclic prefix length is normal length, described time-domain position is specially:

The 1st time slot of the subframe that comprises up DMRS and/or the 4th OFDM (OFDM) symbol of the 2nd time slot, or,

The 1st OFDM symbol of the 7th OFDM symbol of the 1st time slot of the subframe that comprises up DMRS or the 2nd time slot of subframe.

Preferably, in the time that up symbol cyclic prefix length is extension length, described time-domain position is specially:

The 1st time slot of the subframe that comprises up DMRS and/or the 3rd OFDM symbol of the 2nd time slot, or,

The 1st OFDM symbol of the 6th OFDM symbol of the 1st time slot of the subframe that comprises up DMRS or the 2nd time slot of subframe.

Preferably, described frequency domain position comprises:

Whole subcarriers or the parton carrier wave of Physical Uplink Shared Channel (PUSCH) the place bandwidth of the up DMRS place time-domain position of user terminal.

Preferably, described sub-frame configuration or cycle comprise:

The cycle of the sub-frame configuration index of up DMRS, up DMRS, the sub-frame offset of up DMRS.

Preferably, described redirect mode comprises:

On subframe n, the up DMRS sequence of described user terminal takies first bandwidth subcarrier of PUSCH bandwidth or the subcarrier of lower half-band width, and wherein, n is integer,

On subframe n+1, the up DMRS sequence of this user terminal takies the lower half-band width subcarrier of PUSCH bandwidth or the subcarrier of first half-band width,

On subframe n+2, the up DMRS sequence of this user terminal takies first bandwidth subcarrier or the subcarrier of lower half-band width, the successively cycling jump of PUSCH bandwidth.

Preferably, described redirect mode comprises:

On the 1st time slot of subframe n, the up DMRS sequence of described user terminal takies first bandwidth subcarrier of PUSCH bandwidth or the subcarrier of lower half-band width, and wherein, n is integer,

On the 2nd time slot of subframe n, the up DMRS sequence of this user terminal takies the lower half-band width subcarrier of PUSCH bandwidth or the subcarrier of first bandwidth,

Configuration mode on subframe n+1 is identical with subframe n, successively cycling jump.

Preferably, the bit field of described base station by Downlink Control Information or high-level signaling are by resource required up described transmission DMRS or pattern or parameter set sends or instruction is specially to user terminal:

Described base station is that user terminal configuration sends required at least one resource or pattern or the parameter set of up DMRS by high-level signaling, and selects 1 in the middle of described at least one resource or pattern or parameter set by the bit field in Downlink Control Information.

Preferably, described Downlink Control Information comprises for dispatching PUSCH or for dispatching the Downlink Control Information of Physical Downlink Shared Channel (PDSCH) or for dispatching the Downlink Control Information of user terminal of small-cell (small cell).

Preferably, the bit field in described Downlink Control Information comprises:

Carrier wave instruction (Carrier indicator) bit field, or the cyclic shift of DMRS and OCC index bit territory, or be used to indicate the cycle of DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern, or be used to indicate the bit field of the sub-frame number of continuous scheduling.

Preferably, described be used to indicate the cycle of up DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern and described in be used to indicate the bit field of the sub-frame number of continuous scheduling, be carried in the proprietary DCI Format territory of user, or be carried in the DCIFormat territory of the user terminal that is exclusively used in carrying scheduling small cell.

Preferably, in the time that up DMRS takies two time domain OFDM symbols and up DMRS sequence and takies the frequency domain position of same band in a subframe, use orthogonal mask (OCC) to carry out time domain expansion to these two DMRS symbols.

Preferably, described use OCC carries out time domain expansion to these two DMRS symbols and is specially:

In the time that up DMRS takies two time domain OFDM symbols and up DMRS sequence and takies the frequency domain position of different bandwidth in a subframe, use OCC to carry out time domain expansion to the 1st the DMRS symbol of the 1st of subframe n the DMRS symbol and subframe n+1, use OCC to carry out time domain expansion to the 2nd the DMRS symbol of the 2nd of subframe n the DMRS symbol and subframe n+1.

The present invention also provides a kind of sending method of uplink demodulation reference signal, comprising:

User terminal receives bit field or the high-level signaling of the Downlink Control Information for the required resource of collocating uplink DMRS or pattern or parameter set of base station transmission, and described resource or pattern or parameter set comprise:

Described user terminal, according to required resource or pattern or the parameter set of up DMRS of described base station configuration, sends up DMRS.

The 1st time slot of the subframe that comprises up DMRS and/or the 4th OFDM symbol of the 2nd time slot, or,

Preferably, described frequency domain position comprises:

Whole subcarriers or the parton carrier wave of the PUSCH place bandwidth of the up DMRS place time-domain position of user terminal.

Preferably, described sub-frame configuration or cycle comprise:

Preferably, described redirect mode comprises:

Preferably, in the time that up DMRS takies two time domain OFDM symbols and up DMRS sequence and takies the frequency domain position of same band in a subframe, use OCC to carry out time domain expansion to these two DMRS symbols.

Preferably, described Downlink Control Information comprises for dispatching PUSCH or for dispatching the Downlink Control Information of PDSCH or for dispatching the Downlink Control Information of user terminal of small cell.

Preferably, the bit field in described Downlink Control Information comprises:

Carrier wave indication bit territory, or the cyclic shift of DMRS and OCC index bit territory, or be used to indicate the cycle of DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern, or be used to indicate the bit field of the sub-frame number of continuous scheduling.

The present invention also provides a kind of dispensing device of uplink demodulation reference signal, comprising:

Configuration module, is used to user terminal configuration to send required resource or pattern or the parameter set of up DMRS, and described resource or pattern or parameter set comprise:

Indicating module, for passing through Downlink Control Information or high-level signaling by resource required up described transmission DMRS or pattern or parameter set transmission or indicating to user terminal.

Preferably, a kind of dispensing device of uplink demodulation reference signal, comprising:

Configuration receiver module, Downlink Control Information or the high-level signaling for the required resource of collocating uplink DMRS or pattern or the parameter set that send for receiving base station, described resource or pattern or parameter set comprise:

Signal transmitting module, for according to required resource or pattern or the parameter set of up DMRS of described base station configuration, sends up DMRS.

The present invention also provides a kind of transmitting system of uplink demodulation reference signal, comprises base station and the subscriber equipment under it;

Described base station, be used to described user terminal configuration to send required resource or pattern or the parameter set of up DMRS, and bit field by Downlink Control Information or high-level signaling by resource required up described transmission DMRS or pattern parameter set sends or instruction to described user terminal, described resource or pattern or parameter set comprise:

Described user terminal, Downlink Control Information or the high-level signaling for the required resource of collocating uplink DMRS or pattern or the parameter set that send for receiving described base station, and according to required resource or pattern or the parameter set of up DMRS of described base station configuration, send up DMRS.

Preferably, described frequency domain position comprises:

Preferably, described sub-frame configuration or cycle comprise:

Preferably, described redirect mode comprises:

Preferably, described base station sends to user terminal to be specially in resource required up described transmission DMRS or pattern or parameter set by the instruction of Downlink Control Information or high-level signaling:

Described base station is that user terminal configuration sends required at least one each and every one resource or pattern or the parameter set of up DMRS by high-level signaling, and selects 1 in the middle of described at least one resource or pattern or parameter set by the bit field in Downlink Control Information.

Preferably, the bit field in described Downlink Control Information comprises:

The invention provides a kind of sending method, device and system of uplink demodulation reference signal, base station is that user terminal configuration sends required resource or pattern or the parameter set of up DMRS, and by Downlink Control Information or high-level signaling by resource required up described transmission DMRS or pattern parameter set sends or instruction to described user terminal, described resource or pattern or parameter set comprise: time-domain position, frequency domain position, sub-frame configuration or cycle, redirect mode; User terminal receives Downlink Control Information or the high-level signaling for the required resource of collocating uplink DMRS or pattern or parameter set that described base station sends, and according to required resource or pattern or the parameter set of up DMRS of described base station configuration, sends up DMRS.Technical scheme provided by the invention has realized the up DMRS transmit mechanism of low running time-frequency resource expense, has solved the excessive problem of running time-frequency resource expense of uplink demodulation reference signal.

Brief description of the drawings

Fig. 1 is the schematic diagram of the regular circulation prefix in a time slot of prior art;

Fig. 2 is the schematic diagram of the extended cyclic prefix in a time slot of prior art;

Fig. 3 is the schematic diagram that the LTE-A system of prior art adopts the transmitting terminal base band signal process of the Physical Uplink Shared Channel of many antenna port transmission;

Fig. 4 is the mapping schematic diagram that the up code word of the LTE-A system of prior art arrives layer;

Fig. 5 is the flow chart of the sending method of a kind of uplink demodulation reference signal of providing of embodiments of the invention one;

Fig. 6 is the time-frequency position view 1 of placing up DMRS sequence;

Fig. 7 is the time-frequency position view 2 of placing up DMRS sequence;

Fig. 8 is the redirect mode schematic diagram 1 of up DMRS;

Fig. 9 is the redirect mode schematic diagram 2 of up DMRS;

Figure 10 is the structural representation of the dispensing device of a kind of uplink demodulation reference signal of providing of embodiments of the invention three;

Figure 11 is the structural representation of the dispensing device of another uplink demodulation reference signal of providing of embodiments of the invention three.

Embodiment

In order to use low power nodes further to strengthen city outdoor scene, Small cell has been confirmed to be the object of Rel-12 primary study.Small cell belongs to the node of low transmitting power, and radius of society in general can be smaller, mainly considers the scene of low speed UE.Under low speed scene, in order to improve uplink throughput, can consider to reduce the running time-frequency resource expense of up DMRS.How reducing expense, is a problem to be solved.

For the excessive problem of the running time-frequency resource expense of up DMRS in correlation technique, effective solution is not yet proposed at present.

In order to address the above problem, embodiments of the invention provide a kind of sending method, device and system of uplink demodulation reference signal.

Hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the combination in any mutually of the feature in embodiment and embodiment in the application.

Preferred embodiment one

First by reference to the accompanying drawings, embodiments of the invention one are described.

The embodiment of the present invention provides a kind of sending method of uplink demodulation reference signal, use the method complete uplink demodulation reference signal send flow process as shown in Figure 5, comprising:

Step 501, base station are that user terminal configuration sends required resource or pattern or the parameter set of up DMRS;

In this step, described resource or pattern (pattern) or parameter set comprise: time-domain position, frequency domain position, redirect (hopping) mode.

Wherein, time-domain position comprises:

In the time that up symbol cyclic prefix length is normal length, time-domain position is specially: the 1st time slot of the subframe that comprises up DMRS and/or the 4th OFDM symbol of the 2nd time slot; Or, the 1st OFDM symbol of the 7th OFDM symbol of the 1st time slot of the subframe that comprises up DMRS or the 2nd time slot of subframe;

In the time that up symbol cyclic prefix length is extension length, time-domain position is specially: the 1st time slot of the subframe that comprises up DMRS and/or the 3rd OFDM symbol of the 2nd time slot; Or, the 1st OFDM symbol of the 6th OFDM symbol of the 1st time slot of the subframe that comprises up DMRS or the 2nd time slot of subframe.

Frequency domain position comprises: whole subcarriers or the parton carrier wave of the PUSCH place bandwidth of the up DMRS place time-domain position of this user terminal.For example, first bandwidth subcarrier of PUSCH bandwidth or the subcarrier of lower half-band width, taking up symbol cyclic prefix length during as normal length as example, as shown in Fig. 6 or Fig. 7.

Redirect mode comprises:

On subframe n, the up DMRS sequence of this user terminal takies first bandwidth subcarrier of PUSCH bandwidth or the subcarrier of lower half-band width; On subframe n+1, the up DMRS sequence of this user terminal takies the lower half-band width subcarrier of PUSCH bandwidth or the subcarrier of first half-band width; On subframe n+2, the up DMRS sequence of this user terminal takies first bandwidth subcarrier of PUSCH bandwidth or the subcarrier of lower half-band width, cycling jump successively, as shown in Figure 8.

On the 1st time slot of subframe n, the up DMRS sequence of this user terminal takies first bandwidth subcarrier of PUSCH bandwidth or the subcarrier of lower half-band width; On the 2nd time slot of subframe n, the up DMRS sequence of this user terminal takies the lower half-band width subcarrier of PUSCH bandwidth or the subcarrier of first bandwidth; Configuration mode on subframe n+1 is identical with subframe n, cycling jump successively, as shown in Figure 9.

Preferably, in the time that up DMRS takies two time domain OFDM symbols and up DMRS sequence and takies the frequency domain position of different bandwidth in a subframe, use OCC to carry out time domain expansion to the 1st the DMRS symbol of the 1st of subframe n the DMRS symbol and subframe n+1, use OCC to carry out time domain expansion to the 2nd the DMRS symbol of the 2nd of subframe n the DMRS symbol and subframe n+1.

Bit field by Downlink Control Information of step 502, described base station or high-level signaling by resource required up described transmission DMRS or pattern parameter set sends or instruction to user terminal;

In this step, concrete, described base station is that user terminal configuration sends required at least one each and every one resource or pattern or the parameter set of up DMRS by high-level signaling, and selects 1 in the middle of described at least one resource or pattern or parameter set by the bit field in Downlink Control Information.

Preferably, described Downlink Control Information comprises the Downlink Control Information for dispatching PUSCH or PDSCH.

Step 503, user terminal receive Downlink Control Information or the high-level signaling for the required resource of collocating uplink DMRS or pattern or parameter set that base station sends.

Step 504, described user terminal, according to required resource or pattern or the parameter set of up DMRS of described base station configuration, send up DMRS.

Preferred embodiment two

Below in conjunction with accompanying drawing, embodiments of the invention two are described.

Base station is sub-frame configuration or the cycle of user terminal collocating uplink DMRS by high-level signaling, as shown in following table 2 or table 3 or table 4.Wherein, up DMRS sub-frame configuration index in table 2 is 0 o'clock, and the cycle is 0.5, and representing has 2 DMRS time-domain symbol in a subframe, time-domain symbol position is identical with the up DMRS time-domain symbol position in Rel-8/9/10/11 standard, and object is the UE for backward compatibility Rel-8/9/10/11.Up DMRS sub-frame configuration index is 1 o'clock, represents in a subframe, to only have a up DMRS time-domain symbol; Sub-frame configuration index is 2 o'clock, represents that the cycle of up DMRS is 2, is biased to 0, and the 1st subframe in indication cycle has DMRS, and the 2nd subframe do not have DMRS; Other sub-frame configuration indexes of table 1 can be by that analogy.Time-domain position in subframe comprises:

In the time that up symbol cyclic prefix length is normal length, time-domain position is specially: the 1st time slot of subframe or the 4th OFDM symbol of the 2nd time slot; Or, the 1st OFDM symbol of the 7th OFDM symbol of the 1st time slot of subframe or the 2nd time slot of subframe

In the time that up symbol cyclic prefix length is extension length, time-domain position is specially: the 1st time slot of subframe or the 3rd OFDM symbol of the 2nd time slot; Or, the 1st OFDM symbol of the 6th OFDM symbol of the 1st time slot of subframe or the 2nd time slot of subframe.

For table 3 and table 4,2 DMRS time-domain symbol in subframe are regarded as to one group, the time-frequency position of DMRS in subframe is identical with the up DMRS of Rel-8/9/10/11.Sub-frame configuration index is 0 o'clock, UE that can backward compatibility Rel-8/9/10/11.Index is 1 o'clock, the corresponding cycle be 2 and sub-frame configuration be biased to 0, represent taking 2 subframes as the cycle have one group of up DMRS the 1st subframe, do not have the 2nd subframe.Other sub-frame configuration indexes can be by that analogy.

The sub-frame configuration of the up DMRS of table 2

The sub-frame configuration of the up DMRS of table 3

The sub-frame configuration of the up DMRS of table 4

It should be noted that, while specifically enforcement, can also expand according to the configuration rule of table 2 or table 3 or table 4, or a part of choosing wherein configures to produce new sub-frame configuration form.

User terminal receives this high-level signaling that base station sends, and sends up DMRS according to configuration.

Preferred embodiment three

Base station is that user terminal configuration sends required at least one resource or pattern or the parameter set of up DMRS by high-level signaling, and selects 1 in the middle of described at least one resource or pattern or parameter set by the bit field in Downlink Control Information.

Being specially UE taking user terminal describes as example, for two DMRS patterns of UE configuration, first pattern is identical with the up DMRS pattern of Rel-8/9/10/11, object is the UE for backward compatibility lowest version, while being conventional CP, on all subcarriers of the 4th OFDM symbol of each time slot of subframe, place up DMRS sequence, when expansion CP, on all subcarriers of the 3rd OFDM symbol of each time slot of subframe, place up DMRS sequence; Second pattern is for the up DMRS pattern of small cell or NCT configuration, carrys out collocating uplink DMRS in conjunction with the up DMRS sub-frame configuration (as table 2) of high-level signaling configuration, and the time-domain position that sends DMRS comprises:

Bit field in described Downlink Control Information comprises: carrier wave instruction (Carrier indicator) bit field, or the cyclic shift of DMRS and OCC index bit territory, or be used to indicate the cycle of DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern, or be used to indicate the bit field of the sub-frame number of continuous scheduling.

User terminal receives Downlink Control Information and/or the high-level signaling that base station sends, and sends up DMRS according to configuration.

Preferred embodiment four

The embodiment of the present invention provides a kind of sending method of uplink demodulation reference signal, related subscriber equipment is specially UE, base station is transmission cycle and/or the sub-frame offset of UE collocating uplink DMRS, indicates to UE, by the bit field of Downlink Control Information as shown in table 5 or table 6 or table 7.

Taking table 5 as example,, represent that the up DMRS cycle is 1 when the value of bit field is the ' 00 ', each sub-frame of uplink has 2 up DMRS time domain OFDM symbols, and time-domain position and frequency domain position are all followed the identical of Rel-8/9/10/11 standard regulation; , represent that the up DMRS cycle is 2, if sub-frame offset is 0, the 1st subframe in indication cycle includes 2 or 1 up DMRS time domain OFDM symbol when the value of bit field is the ' 01 ', and the 2nd subframe in the cycle do not have up DMRS time domain OFDM symbol.For the up DMRS of the 1st subframe, concrete time-domain position comprises:

In the time that up symbol cyclic prefix length is normal length, time-domain position is specially: the 1st time slot of subframe and/or the 4th OFDM symbol of the 2nd time slot; Or, the 1st OFDM symbol of the 7th OFDM symbol of the 1st time slot of subframe or the 2nd time slot of subframe;

In the time that up symbol cyclic prefix length is extension length, time-domain position is specially: the 1st time slot of subframe and/or the 3rd OFDM symbol of the 2nd time slot; Or, the 1st OFDM symbol of the 6th OFDM symbol of the 1st time slot of subframe or the 2nd time slot of subframe.

Frequency domain position comprises: whole subcarriers or the parton carrier wave of the PUSCH place bandwidth of the up DMRS place time-domain position of this user terminal.

When the value of bit field is ' 10 ' or ' 11 ', can be by that analogy.Table 6 and table 7 item are the cycles that expands to 3 bits indicate up DMRS on the basis of table 5, and indicating mode can be on the basis of table 5 by that analogy.

Preferably, described Downlink Control Information comprises: for dispatching Physical Uplink Shared Channel (PUSCH), for dispatching the Downlink Control Information of Physical Downlink Shared Channel (PDSCH), for dispatching the Downlink Control Information of user terminal of small cell.

Preferably, bit field in described Downlink Control Information comprises: carrier wave instruction (Carrier indicator) bit field, or the cyclic shift of DMRS and OCC index bit territory, or be used to indicate the cycle of DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern, or be used to indicate the bit field of the sub-frame number of continuous scheduling.

Cycle/sub-frame offset instruction of the up DMRS of table 5

Cycle/sub-frame offset instruction of the up DMRS of table 6

Cycle/sub-frame offset instruction of the up DMRS of table 7

Preferably, the described bit field that is used to indicate the cycle of up DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern or is used to indicate the sub-frame number of continuous scheduling, be carried in the proprietary DCI Format territory of user, or be carried in the DCIFormat territory of the user terminal that is exclusively used in carrying scheduling small cell.

User terminal sends up DMRS according to configuration.

Preferred embodiment five

Base station is that user terminal configuration sends required resource or pattern or the parameter set of uplink demodulation reference signal, and described resource or pattern or parameter set comprise:

Preferably, the bit field of described Downlink Control Information has indicated the continuous subframes quantity (being labeled as M) that this Downlink Control Information is dispatched described user terminal, as shown in table 8 or table 9 or table 10:

Table 8 is the sub-frame number instruction of scheduling continuously

Table 9 is the sub-frame number instruction of scheduling continuously

Table 10 is the sub-frame number instruction of scheduling continuously

The time-domain position of described up DMRS is specially:

Preferably, described in be used to indicate the bit field of the sub-frame number of continuous scheduling, be carried in the proprietary DCI Format territory of user, or be carried in the DCIFormat territory of the user terminal that is exclusively used in carrying scheduling small cell.

User terminal sends up DMRS according to configuration.

Preferred embodiment six

The embodiment of the present invention provides a kind of dispensing device of uplink demodulation reference signal, and its structure as shown in figure 10, comprising:

Configuration module 1001, is used to user terminal configuration to send required resource or pattern or the parameter set of up DMRS, and described resource or pattern or parameter set comprise:

Indicating module 1002, for passing through Downlink Control Information or high-level signaling by resource required up described transmission DMRS or pattern or parameter set transmission or indicating to user terminal.

The dispensing device of the uplink demodulation reference signal shown in Figure 10 can be integrated in base station, completes corresponding function by base station.

The embodiment of the present invention also provides a kind of dispensing device of uplink demodulation reference signal, and its structure as shown in figure 11, comprising:

Configuration receiver module 1101, Downlink Control Information or the high-level signaling for the required resource of collocating uplink DMRS or pattern or the parameter set that send for receiving base station, described resource or pattern or parameter set comprise:

Signal transmitting module 1102, for according to required resource or pattern or the parameter set of up DMRS of described base station configuration, sends up DMRS.

The dispensing device of the uplink demodulation reference signal shown in Figure 11 can be integrated in subscriber equipment, completes corresponding function by subscriber equipment.

The embodiment of the present invention also provides a kind of transmitting system of uplink demodulation reference signal, comprise base station and the subscriber equipment under it, the dispensing device that comprises uplink demodulation reference signal shown in Figure 10 in described base station, the dispensing device that comprises uplink demodulation reference signal shown in Figure 11 in described subscriber equipment;

Described base station, be used to described user terminal configuration to send required resource or pattern or the parameter set of up DMRS, and by Downlink Control Information or high-level signaling by resource required up described transmission DMRS or pattern parameter set sends or instruction to described user terminal, described resource or pattern or parameter set comprise:

Preferably, described frequency domain position comprises:

Preferably, described sub-frame configuration or cycle comprise:

Preferably, described redirect mode comprises:

Preferably, the bit field in described Downlink Control Information comprises:

Embodiments of the invention provide a kind of sending method, device and system of uplink demodulation reference signal, base station is that user terminal configuration sends required resource or pattern or the parameter set of up DMRS, and by the instruction of Downlink Control Information or high-level signaling, resource required up described transmission DMRS or pattern or parameter set being sent to described user terminal, described resource or pattern or parameter set comprise: time-domain position, frequency domain position, sub-frame configuration or cycle, redirect mode; User terminal receives Downlink Control Information or the high-level signaling for the required resource of collocating uplink DMRS or pattern or parameter set that described base station sends, and according to required resource or pattern or the parameter set of up DMRS of described base station configuration, sends up DMRS.Technical scheme provided by the invention has realized the up DMRS transmit mechanism of low running time-frequency resource expense, has solved the excessive problem of running time-frequency resource expense of uplink demodulation reference signal.In embodiments of the invention, base station is resource or pattern or the parameter set of the multiple up DMRS of user terminal configuration by Downlink Control Information or high-level signaling, and by the multiple resources of Downlink Control Information Dynamic Selection or or pattern or parameter set in one, base station just can be according to the residing scene of UE, be dynamically UE collocating uplink DMRS, save the expense of up DMRS, thereby improved the transmission performance of system.

The all or part of step that one of ordinary skill in the art will appreciate that above-described embodiment can realize by computer program flow process, described computer program can be stored in a computer-readable recording medium, described computer program (as system, unit, device etc.) on corresponding hardware platform is carried out, in the time carrying out, comprise step of embodiment of the method one or a combination set of.

Alternatively, all or part of step of above-described embodiment also can realize with integrated circuit, and these steps can be made into respectively integrated circuit modules one by one, or the multiple modules in them or step are made into single integrated circuit module realize.Like this, the present invention is not restricted to any specific hardware and software combination.

Each device/functional module/functional unit in above-described embodiment can adopt general calculation element to realize, and they can concentrate on single calculation element, also can be distributed on the network that multiple calculation elements form.

Each device/functional module/functional unit in above-described embodiment is realized and during as production marketing independently or use, can be stored in a computer read/write memory medium using the form of software function module.The above-mentioned computer read/write memory medium of mentioning can be read-only memory, disk or CD etc.

Any be familiar with those skilled in the art the present invention disclose technical scope in, can expect easily change or replace, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range described in claim.

Claims

1. a sending method for uplink demodulation reference signal, is characterized in that, comprising:

Base station is that user terminal configuration sends required resource or pattern (pattern) or the parameter set of uplink demodulation reference signal (DMRS), and described resource or pattern or parameter set comprise:

2. the sending method of uplink demodulation reference signal according to claim 1, is characterized in that, when described Downlink Control Information is described in continuous M subframe rise degree when user terminal, the time-domain position of described up DMRS is specially:

3. the sending method of uplink demodulation reference signal according to claim 1 and 2, is characterized in that, in the time that up symbol cyclic prefix length is normal length, described time-domain position is specially:

4. the sending method of uplink demodulation reference signal according to claim 1 and 2, is characterized in that, in the time that up symbol cyclic prefix length is extension length, described time-domain position is specially:

5. the sending method of uplink demodulation reference signal according to claim 1, is characterized in that, described frequency domain position comprises:

6. the sending method of uplink demodulation reference signal according to claim 1, is characterized in that, described sub-frame configuration or cycle comprise:

7. the sending method of uplink demodulation reference signal according to claim 1, is characterized in that, described redirect mode comprises:

8. the sending method of uplink demodulation reference signal according to claim 1, is characterized in that, described redirect mode comprises:

9. the sending method of uplink demodulation reference signal according to claim 1, it is characterized in that, the bit field of described base station by Downlink Control Information or high-level signaling are by resource required up described transmission DMRS or pattern or parameter set sends or instruction is specially to user terminal:

10. according to the sending method of the uplink demodulation reference signal described in claim 1 or 9, it is characterized in that, described Downlink Control Information comprises for dispatching PUSCH or for dispatching the Downlink Control Information of Physical Downlink Shared Channel (PDSCH) or for dispatching the Downlink Control Information of user terminal of small-cell (small cell).

11. according to the sending method of the uplink demodulation reference signal described in claim 1 or 9, it is characterized in that, the bit field in described Downlink Control Information comprises:

The sending method of 12. uplink demodulation reference signals according to claim 11, is characterized in that,

Described be used to indicate the cycle of up DMRS or the bit field of sub-frame configuration or sub-frame offset or pattern and described in be used to indicate the bit field of the sub-frame number of continuous scheduling, be carried in the proprietary DCIFormat territory of user, or be carried in the DCI Format territory of the user terminal that is exclusively used in carrying scheduling small cell.

The sending method of 13. uplink demodulation reference signals according to claim 1, is characterized in that:

In the time that up DMRS takies two time domain OFDM symbols and up DMRS sequence and takies the frequency domain position of same band in a subframe, use orthogonal mask (OCC) to carry out time domain expansion to these two DMRS symbols.

The sending method of 14. uplink demodulation reference signals according to claim 13, is characterized in that, described use OCC carries out time domain expansion to these two DMRS symbols and is specially:

The sending method of 15. 1 kinds of uplink demodulation reference signals, is characterized in that, comprising:

The sending method of 16. uplink demodulation reference signals according to claim 15, is characterized in that, when described Downlink Control Information is described in continuous M subframe rise degree when user terminal, the time-domain position of described up DMRS is specially:

17. according to the sending method of the uplink demodulation reference signal described in claim 15 or 16, it is characterized in that, in the time that up symbol cyclic prefix length is normal length, described time-domain position is specially:

18. according to the sending method of the uplink demodulation reference signal described in claim 15 or 16, it is characterized in that, in the time that up symbol cyclic prefix length is extension length, described time-domain position is specially:

The sending method of 19. uplink demodulation reference signals according to claim 15, is characterized in that, described frequency domain position comprises:

The sending method of 20. uplink demodulation reference signals according to claim 15, is characterized in that, described sub-frame configuration or cycle comprise:

The sending method of 21. uplink demodulation reference signals according to claim 15, is characterized in that, described redirect mode comprises:

The sending method of 22. uplink demodulation reference signals according to claim 15, is characterized in that, described redirect mode comprises:

The sending method of 23. uplink demodulation reference signals according to claim 15, is characterized in that:

In the time that up DMRS takies two time domain OFDM symbols and up DMRS sequence and takies the frequency domain position of same band in a subframe, use OCC to carry out time domain expansion to these two DMRS symbols.

The sending method of 24. uplink demodulation reference signals according to claim 23, is characterized in that, described use OCC carries out time domain expansion to these two DMRS symbols and is specially:

The sending method of 25. uplink demodulation reference signals according to claim 15, it is characterized in that, described Downlink Control Information comprises for dispatching PUSCH or for dispatching the Downlink Control Information of PDSCH or for dispatching the Downlink Control Information of user terminal of small cell.

The sending method of 26. uplink demodulation reference signals according to claim 15, is characterized in that, the bit field in described Downlink Control Information comprises:

The sending method of 27. uplink demodulation reference signals according to claim 26, is characterized in that,

The dispensing device of 28. 1 kinds of uplink demodulation reference signals, is characterized in that, comprising:

The dispensing device of 29. 1 kinds of uplink demodulation reference signals, is characterized in that, comprising:

The transmitting system of 30. 1 kinds of uplink demodulation reference signals, is characterized in that, comprises base station and the subscriber equipment under it;

The transmitting system of 31. uplink demodulation reference signals according to claim 30, is characterized in that, when described Downlink Control Information is described in continuous M subframe rise degree when user terminal, the time-domain position of described up DMRS is specially:

32. according to the transmitting system of the uplink demodulation reference signal described in claim 30 or 31, it is characterized in that, in the time that up symbol cyclic prefix length is normal length, described time-domain position is specially:

33. according to the transmitting system of the uplink demodulation reference signal described in claim 30 or 31, it is characterized in that, in the time that up symbol cyclic prefix length is extension length, described time-domain position is specially:

The transmitting system of 34. uplink demodulation reference signals according to claim 30, is characterized in that, described frequency domain position comprises:

The transmitting system of 35. uplink demodulation reference signals according to claim 30, is characterized in that, described sub-frame configuration or cycle comprise:

The transmitting system of 36. uplink demodulation reference signals according to claim 30, is characterized in that, described redirect mode comprises:

The transmitting system of 37. uplink demodulation reference signals according to claim 30, is characterized in that, described redirect mode comprises:

The transmitting system of 38. uplink demodulation reference signals according to claim 30, it is characterized in that, described base station sends to user terminal to be specially in resource required up described transmission DMRS or pattern or parameter set by the instruction of Downlink Control Information or high-level signaling:

39. according to the transmitting system of the uplink demodulation reference signal described in claim 30 or 38, it is characterized in that, described Downlink Control Information comprises for dispatching PUSCH or for dispatching the Downlink Control Information of PDSCH or for dispatching the Downlink Control Information of user terminal of small cell.

40. according to the transmitting system of the uplink demodulation reference signal described in claim 30 or 38, it is characterized in that, the bit field in described Downlink Control Information comprises:

41. according to the transmitting system of the uplink demodulation reference signal described in claim 40, it is characterized in that,