CN107113780A - A kind of data transmission method, device and system - Google Patents

A kind of data transmission method, device and system Download PDF

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Publication number
CN107113780A
CN107113780A CN201580071646.1A CN201580071646A CN107113780A CN 107113780 A CN107113780 A CN 107113780A CN 201580071646 A CN201580071646 A CN 201580071646A CN 107113780 A CN107113780 A CN 107113780A
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CN
China
Prior art keywords
symbol
primary sign
crs
subframe
transmission
Prior art date
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CN201580071646.1A
Other languages
Chinese (zh)
Inventor
吴作敏
郑娟
李强
Original Assignee
华为技术有限公司
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Publication date
Priority to CNPCT/CN2015/086539 priority Critical
Priority to CN2015086539 priority
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/086969 priority patent/WO2017024597A1/en
Publication of CN107113780A publication Critical patent/CN107113780A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources

Abstract

A kind of data transmission method, device and system.Base station determines the primary sign for being used to carry out data transmission in subframe, and determine to need the position of reference signal and the sequence transmitted in the burst from the primary sign on symbol untill the last symbol of the subframe terminates, and ensure to need to transmit CRS in the primary sign, so, for user equipment, frequency deviation detection can be carried out according to other reference signals transmitted on the symbol after the CRS transmitted in the primary sign and the primary sign, to ensure the demodulation performance to the data of transmission.

Description

A kind of data transmission method, device and system Technical field

The present invention relates to wireless communication technology field more particularly to a kind of data transmission methods, device and system.

Background technique

License auxiliary access LTE (Licensed-Assisted Access Using LTE, abbreviation LAA-LTE) system is dedicated to utilizing carrier wave polymerization (the Carrier Aggregation in existing LTE system, abbreviation CA) configuration and structure, to configure based on the carrier wave in operator's licensed spectrum communicated, configure multiple carrier waves exempted from licensed spectrum and to permit carrier wave to carry out exempting to permit to communicate on carrier wave for auxiliary, exempt from licensed spectrum resource by utilization and achieve the purpose that network capacity shunts, to reduce the load of license carrier wave.

The specification that coexists for licensed band that LAA-LTE was used exempt from includes transmitting power control (Transmit Power Control, abbreviation TPC), dynamic frequency selection (Dynamic Frequency Selection, abbreviation DFS), channel occupancy bandwidth and listem-before-talk (Listen before talk, abbreviation LBT) etc..TPC is that wireless telecom equipment emits excessive power to interfere radar in order to prevent.DFS is the frequency in order to use wireless telecom equipment active probe radar, and actively selects another frequency, to avoid radar frequency.The requirement of channel occupancy bandwidth is the occupied channel width when wireless telecom equipment works on exempting from licensed band, should reach the 80%~100% of the channel width that it is claimed.LBT is the coexistence policies between system, and wireless communication system need to use first to detect when occupancy exempts from licensed band communication sends rule afterwards.

LBT mechanism is divided into the LBT mechanism of the LBT mechanism of the equipment (Frame based equipment, abbreviation FBE) based on frame and the equipment (Load based equipment, abbreviation LBE) based on load again.In LAA-LTE system, follow the carrier wave flowcollector aggregation scheme FlowCollector in existing LTE system, the sub-frame boundary for exempting from the carrier wave on the sub-frame boundary and licensed spectrum of the carrier wave in licensed spectrum should be alignment, but on exempting from licensed spectrum, if theoretically base station may obtain the right to use for exempting from the channel in licensed spectrum from any time using the LBT mechanism based on LBE.When time span when base station obtains the right to use for exempting from channel in licensed spectrum at the time of apart from next sub-frame boundary is less than a subframe, in order to avoid the wasting of resources, LAA System permission is transmitted in this time span, and the initial position of transmission can be the initial position of any one symbol except first outer symbol.From the point of view of receiving end, user equipment needs demodulate the control channel and data channel of transmission.

Summary of the invention

The embodiment of the invention provides a kind of data transmission methods, device and system to guarantee the signal demodulation performance of user equipment when any one symbol for removing first outer symbol in subframe carries out data transmission for initial position.

In a first aspect, providing a kind of data transmission method, comprising:

Base station determines that the primary sign in subframe for carrying out data transmission, the primary sign are a symbol in addition to first symbol;

The base station determines position and the sequence for the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein, the base station determines transmission cell special reference CRS in the primary sign;

Transmit all symbols in the subframe since the primary sign until the last symbol of the subframe terminates in the base station.

With reference to first aspect, in the first possible implementation of the first aspect, the base station, which determines, transmits CRS in the primary sign, comprising:

The base station determines that the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign is identical;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

The possible implementation of with reference to first aspect the first, in the second possible implementation of the first aspect, first symbol are first symbol in a subframe;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or

First symbol before the primary sign is used for apart from the primary sign is nearest Transmit the symbol of CRS;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

With reference to first aspect the first or second of possible implementation, in a third possible implementation of the first aspect, the sequence of the CRS transmitted in the primary sign are identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or

The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.

With reference to first aspect or the first any one into the third possible implementation of first aspect, in a fourth possible implementation of the first aspect, the primary sign is one in predefined symbol initial position.

With reference to first aspect or the first any one into the 4th kind of possible implementation of first aspect, in the fifth possible implementation of the first aspect, transmitting physical downlink channel control PDCCH is gone back in the primary sign, and the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.

With reference to first aspect or the first any one into the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation of first aspect, the position for the reference signal that the determination is transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates and sequence, comprising:

According to reference signal pattern predetermined, position and the sequence of the reference signal transmitted on the symbol after the primary sign are determined.

With reference to first aspect or the first any one into the 6th kind of possible implementation of first aspect, in a seventh possible implementation of the first aspect, the base station determines position and the sequence for the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, it include: to judge whether need to transmit user-specific reference signal UERS in the primary sign according to reference signal pattern predetermined;If being judged as YES, forbid transmitting UERS in the primary sign.

With reference to first aspect or first aspect the first is any into the 7th kind of possible implementation One kind, in the 8th kind of possible implementation of first aspect, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

Second aspect provides a kind of data transmission method, comprising:

User equipment receives subframe;Wherein, transmission has reference signal on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, and transmission has CRS in the primary sign in the subframe, and the primary sign is first symbol for having data to transmit;

The user equipment demodulates the symbol in the subframe since the primary sign until the last symbol of the subframe terminates according to the reference signal.

In conjunction with second aspect, it is identical to be used for transmission the frequency domain position of CRS transmitted on the first symbol of CRS in the first possible implementation of the second aspect, in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

The first possible implementation of aspect in conjunction with the, in second of possible slotted mode of second aspect, first symbol is first symbol in a subframe;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

In conjunction with the first or second of possible implementation of second aspect, in the third possible implementation of the second aspect, the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or

The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.

In conjunction with any one implementation of the first of second aspect or second aspect into the third possible implementation, in the fourth possible implementation of the second aspect, the primary sign is pre- One in the symbol initial position of definition.

In conjunction with any one implementation of the first of second aspect or second aspect into the 4th kind of possible implementation, in a fifth possible implementation of the second aspect, transmitting physical downlink channel control PDCCH is gone back in the primary sign, and the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.

In conjunction with any one implementation of the first of second aspect or second aspect into the 5th kind of possible implementation, in the sixth possible implementation of the second aspect, the position for the reference signal transmitted on symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.

In conjunction with any one implementation of the first of second aspect or second aspect into the 6th kind of possible implementation, in the 7th kind of possible implementation of second aspect, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

The third aspect provides a kind of base station, comprising:

First determining module, for determining that the primary sign in subframe for carrying out data transmission, the primary sign are a symbol in addition to first symbol;

Second determining module, for determining position and the sequence of the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein, the base station determines transmission cell special reference CRS in the primary sign;

Transmission module is used for transmission in the subframe all symbols since the primary sign until the last symbol of the subframe terminates.

In conjunction with the third aspect, in the first possible implementation of the third aspect, second determining module is specifically used for:

Determine that the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign is identical;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

In conjunction with the first possible implementation of the third aspect, in second of possible reality of the third aspect In existing mode, first symbol is first symbol in a subframe;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

In conjunction with the first or second of possible implementation of the third aspect, in the third possible implementation of the third aspect, the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or

The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.

In conjunction with any one implementation of the first of the third aspect or the third aspect into the third possible implementation, in the fourth possible implementation of the third aspect, the primary sign is one in predefined symbol initial position.

In conjunction with any one implementation of the first of the third aspect or the third aspect into the 4th kind of possible implementation, in the 5th kind of possible implementation of the third aspect, transmitting physical downlink channel control PDCCH is gone back in the primary sign, and the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.

In conjunction with any one implementation of the first of the third aspect or the third aspect into the 5th kind of possible implementation, in the 6th kind of possible implementation of the third aspect, second determining module is specifically used for: according to reference signal pattern predetermined, determining position and the sequence of the reference signal transmitted on the symbol after the primary sign.

In conjunction with any one implementation of the first of the third aspect or the third aspect into the 6th kind of possible implementation, in the 7th kind of possible implementation of the third aspect, second determining module is specifically used for: according to reference signal pattern predetermined, judging whether need to transmit user-specific reference signal UERS in the primary sign;If being judged as YES, forbid transmitting UERS in the primary sign.

In conjunction with any one implementation of the first of the third aspect or the third aspect into the 7th kind of possible implementation, in the 8th kind of possible implementation of the third aspect, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

Fourth aspect provides a kind of user equipment, comprising:

Receiving module, for receiving subframe;Wherein, transmission has reference signal on symbol in the subframe since the primary sign until the last symbol of the subframe terminates, transmission has cell special reference CRS in primary sign in the subframe, and the primary sign is first symbol for having data to transmit;

Demodulation module, for being demodulated according to the reference signal to the symbol in the subframe since the primary sign until the last symbol of the subframe terminates.

In conjunction with fourth aspect, it is identical to be used for transmission the frequency domain position of CRS transmitted on the first symbol of CRS in the first possible implementation of the fourth aspect, in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

In conjunction with the first possible implementation of fourth aspect, in the second possible implementation of the fourth aspect, first symbol is first symbol in a subframe;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or

First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

In conjunction with the first or second of possible implementation of fourth aspect, in the third possible implementation of the fourth aspect, the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or

The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.

In conjunction with any one the possible implementation of the first of fourth aspect or fourth aspect into the third possible implementation, in the fourth possible implementation of the fourth aspect, the primary sign is one in predefined symbol initial position.

In conjunction with any one the possible implementation of the first of fourth aspect or fourth aspect into the 4th kind of possible implementation, in the 5th kind of possible implementation of fourth aspect, transmitting physical downlink channel control PDCCH is gone back in the primary sign, and the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.

In conjunction with any one the possible implementation of the first of fourth aspect or fourth aspect into the 5th kind of possible implementation, in the 6th kind of possible implementation of fourth aspect, the position for the reference signal transmitted on symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.

In conjunction with any one the possible implementation of the first of fourth aspect or fourth aspect into the 6th kind of possible implementation, in the 7th kind of possible implementation of fourth aspect, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

5th aspect, provides a kind of base station, comprising: transceiver 701, processing unit 702 and memory 703.

Processing unit 702 is used for the operation of control base station 700;Memory 703 may include read-only memory and random access memory, for providing instruction and data to processing unit 702.The a part of of memory 703 can also include non-volatile row random access memory (NVRAM).The various components of base station are coupled by bus system, and wherein bus system 709 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.

Transceiver 701 can be multiple element, that is, includes transmitter and transceiver, provide the unit for communicating over a transmission medium with various other devices.

The data transmission stream journey that the base station side that the embodiment of the present invention discloses is realized can be applied in processing unit 702, or be realized by processing unit 702.During realization, each step for the data transmission stream journey that base station side is realized can be completed with the instruction of the integrated logic circuit of the hardware in through the processing unit 702 or software form.Processing unit 702 can be general processor, digital signal processor, dedicated integrated electricity Perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention for road, field programmable gate array or other programmable logic device, discrete gate.General processor can be microprocessor or any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 703, and processing unit 702 reads the information in memory 703, completes the data transmission stream journey that base station side is realized in conjunction with its hardware.

6th aspect, provides a kind of user equipment, comprising: transceiver 901, processing unit 902 and memory 903.

Processing unit 902 is used to control the operation of user equipment 900;Memory 903 may include read-only memory and random access memory, for providing instruction and data to processing unit 902.The a part of of memory 903 can also include non-volatile row random access memory (NVRAM).The various components of user equipment are coupled by bus system, and wherein bus system 909 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.

The data transmission stream journey that the user equipment side that the embodiment of the present invention discloses is realized can be applied in processing unit 902, or be realized by processing unit 902.During realization, each step for the data transmission stream journey that user equipment side is realized can be completed with the instruction of the integrated logic circuit of the hardware in through the processing unit 902 or software form.Processing unit 902 can be general processor, digital signal processor, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate, and perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be microprocessor or any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The storage medium is located at memory 903, processing The step of unit 902 reads the information in memory 903, completes the data transmission stream journey that user equipment side is realized in conjunction with its hardware.

In the above embodiment of the present invention, base station determines the primary sign in subframe for carrying out data transmission, and determine the position for needing the reference signal transmitted on the symbol from the primary sign until the last symbol of the subframe terminates in the burst and sequence, and guarantee to need to transmit CRS in the primary sign, in this way, for user equipment, frequency deviation detection can be carried out according to other reference signals transmitted on the symbol after the CRS transmitted in the primary sign and the primary sign, to guarantee the demodulation performance to the data of transmission.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment is briefly introduced, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without any creative labor, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of reference signal pattern schematic diagram in the prior art;

Fig. 2 is the data transmission stream journey schematic diagram provided in an embodiment of the present invention realized in base station side;

Fig. 3 A, Fig. 3 B and Fig. 3 C are respectively UERS pattern schematic diagram in the prior art;

Fig. 4 is the data transmission stream journey schematic diagram provided in an embodiment of the present invention realized in terminal side;

Fig. 5 A, Fig. 5 B, Fig. 5 C and Fig. 5 D are respectively the resource impact schematic diagram of the reference signal of the part subframe in the embodiment of the present invention under various scenes;

Fig. 6 is the structural schematic diagram of base station provided in an embodiment of the present invention;

Fig. 7 be another embodiment of the present invention provides base station structural schematic diagram;

Fig. 8 is the structural schematic diagram of user equipment provided in an embodiment of the present invention;

Fig. 9 be another embodiment of the present invention provides user equipment structural schematic diagram.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to this Invention is described in further detail, it is clear that the described embodiments are only some of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, all other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall within the protection scope of the present invention.

It should be understood that in LTE or LAA-LTE system, from time dimension, it is assumed that the smallest time quantum is Ts, 1Ts=1/ (15000 × 2048) second;1 do not include cyclic prefix part OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) symbol time span be 2048 × Ts, be approximately equal to 66.7 microseconds;The time span of one subframe is 1ms, and specific there are two types of sub-frame formats.One is normal cyclic prefix (Normal Cyclic Prefix, referred to as NCP) sub-frame formats, a NCP subframe includes 14 OFDM symbols;By OFDM symbol, label is to 13 since 0, then the time span of No. 0 and No. 7 OFDM symbol therein is 2208 × Ts, and the time span of other 12 OFDM symbols is 2192 × Ts;No. 0 to No. 6 OFDM symbol is defined as odd numbered slots, No. 7 to No. 13 OFDM symbol is defined as even timeslots.Another kind is long loop prefix (Extended Cyclic Prefix, referred to as ECP) sub-frame formats, and an ECP subframe includes 12 OFDM symbols;The time span of each OFDM symbol is 2560 × Ts;By OFDM symbol, No. 0 to No. 5 OFDM symbol is defined as odd numbered slots, is defined as even timeslots for No. 6 to o.11 OFDM symbol by label to 11 since 0.If being all by taking NCP sub-frame formats as an example, ECP sub-frame formats can be derived from embodiments of the present invention without specified otherwise.

Firstly, for convenience of description, present specification introduces the concept of " part subframe "." part subframe " is by all symbols until the last symbol of the subframe terminates are constituted since the primary sign for data transmission in a subframe, wherein, the primary sign for data transmission can be any one symbol other than first symbol.That is, time span of the length of part subframe in the time domain for the initial time from the initial time for the primary sign transmitted for data to next subframe.Relative to " part subframe ", present specification also introduces the concept of " complete subframe ".For one complete subframe for a part subframe, complete subframe contains all symbols in the subframe that system defines." the part subframe " and " complete subframe " occurred in the following contents, meaning is identical as foregoing description, repeats no more.

In the transmission technology of part subframe, a kind of method is the reference signal pattern of the DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot) defined according to LTE system, the transmission of reference signals in the subframe of part.It has disadvantages that in this way, first, the symbol numbers for the special subframe transmission that existing DwPTS format is supported are 6,9,10,11,12, correspondingly, it is the 2nd, 3,4,5, No. 8 symbol that the data that base station allows, which transmit initial position, wherein the possible symbol start bit of odd numbered slots is equipped with 4, and the possible symbol initial position of even timeslots only has 1, and the symbol numbers that odd numbered slots and even timeslots allow to transmit are asymmetric.Secondly, the subframe structure of multiplexing DwPTS, the initial position for allowing data to transmit are at least symbol 8, if base station robbed after symbol 8 account for channel if cannot transmit in current part subframe, expense is larger.Again, existing DwPTS has two sets of different user-specific reference signals (UE-specific reference signal, abbreviation UERS, also it cries, Demodulation Reference Signal, demodulated reference signal) pattern, along with the reference signal pattern of the UERS of complete subframe, base station needs to prepare in advance the data burst mapping comprising at least 3 sets different reference signal positions, and base station implementation complexity is higher.

In the transmission technology of part subframe, another method is that the pattern for the reference signal transmitted in the subframe of part is that first sign-on of reference signal pattern of the complete subframe defined from LTE system is multiplexed.

Fig. 1 shows CRS (Cell-specific Reference Signal, the cell special reference) signal location of antenna port equal to 2 when.In Fig. 1, a subframe includes 2 time slots, and each time slot includes 7 OFDM symbols.Wherein, there is CRS on the 0th, 4,7, No. 11 symbol, have UERS on the 5th, 6,12, No. 13 symbol.According to the above method, assuming that the data transmission initial position of base station is No. 9 symbol, reference signal pattern on so No. 9 symbol is identical with the reference signal pattern on No. 0 symbol of complete subframe, correspondingly, the reference signal pattern on the 10th, 11,12, No. 13 symbol is also identical with the reference signal pattern on the 1st, 2,3, No. 4 symbol of completely subframe.In this case, it is transmitted without UERS reference signal, i.e., part subframe cannot support the transmission mode demodulated based on UERS.In order to guarantee to support the transmission mode demodulated based on UERS, the data transmission initial position of base station, which at least should be No. 7 symbol, could transmit UERS, but this illustrate base station robbed after symbol 7 account for channel can not be in current part sub-frame transmission, expense is larger.

In the transmission technology of part subframe, it is identical with the position of reference signal pattern of complete subframe that LTE system defines that another method is that the pattern position for the reference signal transmitted in the subframe of part is.Such as, assuming that the data transmission initial position of base station is No. 9 symbol, reference signal pattern on so No. 9 symbol is identical with the reference signal pattern on No. 9 symbol of complete subframe, correspondingly, the reference signal pattern on the 10th, 11,12, No. 13 symbol is also identical with the reference signal pattern on the 10th, 11,12, No. 13 symbol of completely subframe.In LTE system, in order to guarantee estimated accuracy, it should usually be not less than a fixed value, such as 3 symbols for the time interval between two symbols of offset estimation.But in this case, part subframe only has reference signal on the 11st, 12, No. 13 symbol, it cannot be guaranteed that the performance of offset estimation, therefore be unfavorable for demodulating the data transmitted in the part subframe.

It can be seen that in the case where not increasing base station implementation complexity and overhead, the problem of how passing through demodulation performance of the reference signal guarantee user equipment to part subframe of transmission, be current urgent need to resolve.

In order to realize the transmission for exempting from licensed spectrum top molecule frame, guarantee user equipment to the demodulation performance of part subframe, in the embodiment of the present invention, by the position of CRS with part subframe at the beginning of be adjusted, transmission has CRS in the primary sign of guarantee section subframe.

It should be understood that the technical solution of the embodiment of the present invention can be applied to also can be applied to other using the LAA-LTE system for exempting from licensed band with similar, fixed therewith sub-frame boundary or character boundary and with the communication system of resource contention demand.

It should be understood that, the symbol referred in the technical solution of the embodiment of the present invention can be an OFDM symbol in LAA-LTE system or LTE system, specifically, OFDM symbol includes cyclic prefix (Cyclic Prefix, referred to as CP) partially with message segment part, wherein message segment part includes all information of an OFDM symbol;CP is the repetition to a part of information segment signal.The symbol referred in the technical solution of the embodiment of the present invention is also possible to the symbol of other kinds of communication, and this is not limited by the present invention.

It should be understood that OFDM symbol as mentioned in the embodiments of the present invention has the attribute of time dimension and frequency dimension, wherein the attribute of time dimension includes the time span of OFDM symbol, and the attribute of frequency dimension includes subcarrier number, subcarrier bandwidth etc..

It should be understood that communication system locating for base station that the embodiment of the present invention refers to and user equipment is with predefined or says the subframe initial time of fixation, subframe finish time, symbol initial time, symbol knot The communication system at beam moment.This communication system is with dividing elements time regular time, that is to say, that the granularity of unit between when determined, the initial time of a time quantum, finish time, then it is known that the initial time of the time quantum in past and future and finish time.In embodiments of the present invention, sub-frame boundary refers to subframe initial time or subframe finish time, the initial time of character boundary designations or finish time, the initial time of one subframe is equal to the finish time of a subframe, and the initial time of a symbol is equal to the finish time of a symbol.

It will also be understood that, in embodiments of the present invention, in certain area coverage, by the communication system of the same operator, such as LAA-LTE system, carrier wave in licensed spectrum is main carrier, and the carrier wave exempted from licensed spectrum is secondary carrier, and the sub-frame boundary for exempting from the secondary carrier in licensed spectrum is aligned with the sub-frame boundary of the main carrier in licensed spectrum.On exempting from licensed spectrum, base station may obtain the right to use for exempting from licensed spectrum channel from any time.When being just aligned with the sub-frame boundary of the main carrier in licensed spectrum at the time of base station obtains the channel right to use for exempting from the secondary carrier in licensed spectrum, base station can be normally carried out transmission by existing LTE structure in secondary carrier;When the time span of next sub-frame boundary at the time of the channel right to use of the secondary carrier in licensed spectrum is exempted from acquisition when base station apart from main carrier is less than a subframe, in order to avoid the wasting of resources, LAA system allows to carry out the transmission of part subframe in this time span, and the initial position of part subframe can be the initial position of any one symbol except first outer symbol.

In embodiments of the present invention, user equipment (User Equipment, referred to as UE) terminal (Terminal) can be referred to as, mobile station (Mobile Station, referred to as MS), mobile terminal (Mobile Terminal) etc., the user equipment can be through wireless access network (Radio Access Network, referred to as RAN) it is communicated with one or more core nets, such as, user equipment can be mobile phone (or being " honeycomb " phone), computer etc. with mobile terminal, such as, user equipment can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchange voice and/or data with wireless access network.

In embodiments of the present invention, base station can be evolved base station (the Evolutional Node B in LTE system or LAA-LTE system, referred to as eNB or e-NodeB), macro base station, micro-base station (also referred to as " small base station "), femto base station, access website (Access Point, referred to as AP) or transmission website (Transmission Point, referred to as TP) etc., the present invention does not limit this.But for convenience of description, Following embodiments will be illustrated by taking base station and user equipment as an example.

The embodiment of the present invention is described in detail with reference to the accompanying drawing.

It referring to fig. 2, is the data transmission stream journey schematic diagram provided in an embodiment of the present invention realized in base station side.As shown, the process can comprise the following steps that

Step 201: base station determines the primary sign in subframe for carrying out data transmission, and the primary sign is a symbol in addition to first symbol.

Wherein, all symbol composition part subframes in the subframe since the primary sign until the last symbol of the subframe terminates, that is, time span of the length of part subframe in the time domain for the initial time from the initial time of the primary sign to next subframe.

It should be understood that, the primary sign is that base station starts transmitting physical downlink channel control (Physical Downlink Control Channel, referred to as PDCCH) and/or Physical Downlink Shared Channel (Physical Downlink Shared Channel, referred to as PDSCH) and/or enhancing Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel, referred to as EPDCCH) first symbol.

During specific implementation step 201, optionally, the method that base station first passes through competition obtains the right to use of channel, then determines the primary sign transmitted on that channel again.Optionally, the primary sign that base station determines can be first complete symbols after the right to use of base station acquisition channel.For example, the base station can be with determining section molecule start-of-frame number for No. 8 symbol if base station is in the initial time of No. 7 symbol of a complete subframe and obtains the right to use of channel at the time of between finish time.Optionally, the part subframe primary sign that base station determines can be second complete symbols after the right to use of base station acquisition channel.Such as, if base station is in the initial time of No. 7 symbol of a complete subframe and obtains the right to use of channel at the time of between finish time, so the base station can be with determining section molecule start-of-frame number for No. 9 symbol, wherein, finish time at the time of obtaining the channel right to use from base station to No. 8 symbol can be used for transmitting leader sequence or be only used for transmission filling signal, for UE (User Equipment, user equipment, also referred to as terminal) adjustment AGC (Automatic Gain Control, automatic growth control).

During specific implementation step 201, optionally, the primary sign is one in predefined symbol initial position.Optionally, the primary sign of base station determining section molecule frame can be the base station and obtain First after obtaining the right to use of the channel symbol belonged in predefined symbol initial position set.Such as, if predefined symbol initial position collection is combined into No. 0 of a complete subframe, No. 3, No. 7, No. 10 symbol, base station is in the initial time of No. 7 symbol of a complete subframe and the right to use of channel is obtained at the time of between finish time, then the base station can be with determining section molecule start-of-frame number for No. 10 symbol.

During specific implementation step 201, optionally, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.More specifically optionally, base station can obtain the right to use for exempting from the channel of licensed spectrum by the method for competition based on the criterion of LBT;Alternatively, obtaining the right to use for exempting from the channel of licensed spectrum after base station can be by coordinating or dispatching with neighbouring communication equipment;Alternatively, base station can use pattern by preconfigured resource, the right to use for exempting from the channel of licensed spectrum is obtained.

Further, in the case where multiple carrier waves, the primary sign on different carrier waves may be identical.

Step 202: base station determines position and the sequence for the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein the base station, which determines, transmits CRS in the primary sign.

The position of the reference signal includes time domain and/or frequency domain position, specifically, it can refer to the position of resource unit (Resource element, RE) that reference signal is be mapped in Physical Resource Block (Physical Resource Block, referred to as PRB).It is to be understood that the position of reference signal refers to: in 1 PRB, the position of the occupied RE of reference signal.LTE system may include 7 symbols, may include 12 subcarriers on frequency domain in 1 subframe comprising a PRB pair wherein the length of each PRB is the length of a time slot in the time domain.The initiation parameter that the CRS pseudo-random sequence of LTE system generates is that the sequence for the CRS that time domain serial number scrambling code of the symbol in the PRB where the CRS sequence is obtained, therefore sent on each symbol in 1 PRB is different.

Further, in the step 202 of process shown in Fig. 2, base station according to reference signal pattern predetermined, can determine position and the sequence of the reference signal transmitted on the symbol after primary sign.In this way, the position for the reference signal transmitted on symbol after making primary sign and sequence follow existing protocol regulation, reduce system implementation complexity.For example, then on the symbol after the primary sign in the part subframe, can be mapped according to existing UERS pattern as needed to transmit UERS in fruit part subframe UERS, wherein the UERS pattern is the pattern of UERS in reference signal pattern.Fig. 3 A, Fig. 3 B and Fig. 3 C respectively illustrate several existing UERS patterns, wherein Fig. 3 A and Fig. 3 B are the UERS pattern of DwPTS special subframe, and Fig. 3 C is the UERS pattern of complete subframe.Certainly, definition can also be re-started for the position of reference signal and sequence, the embodiment of the present invention transmitted on the symbol after primary sign.

Optionally, after base station obtains the channel right to use by channel competition, it can be in step 202, according to reference signal pattern predetermined, whether need to transmit UERS in first complete symbols (primary sign of the i.e. described part subframe) after judging the acquisition channel right to use, if being judged as YES, forbid transmitting UERS on the symbol.Still optionally further, since the port of a UERS occupies two adjacent symbols of time domain, if first complete symbols after the acquisition channel right to use are the previous symbols of the occupied adjacent two symbols of UERS, such as symbol 5, then forbidding transmitting UERS on adjacent two symbols (symbol 5 and symbol 6).

Optionally, in another embodiment, if base station is according to reference signal pattern predetermined, it needs to transmit UERS in first complete symbols (primary sign of the i.e. described part subframe) after the judgement acquisition channel right to use, first symbol for not transmitting UERS after the acquisition channel right to use can also be determined as the primary sign for starting to carry out data transmission, first complete symbols after the acquisition channel right to use are otherwise determined as the primary sign for starting to carry out data transmission.In this way, transmission in primary sign can be made to have CRS, but not UERS is transmitted, avoid the resource contention of CRS and UERS, so that system realization is more simple.

In step 202, optionally, the frequency domain position of the CRS transmitted in primary sign is identical as the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in reference signal pattern.I.e., it is possible to understand are as follows: the frequency domain position of the CRS transmitted in primary sign is identical as the CRS frequency domain position on some symbol (i.e. above-mentioned first symbol) being used for transmission in the symbol of CRS in a complete subframe.Optionally, the sequence of the CRS transmitted in primary sign is identical as the sequence of CRS transmitted on the first symbol for being used for transmission CRS.Optionally, the initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

If without specified otherwise, in embodiments of the present invention, be all by taking 2 CRS antenna ports as an example, The case where for 1 CRS antenna port, can similarly be derived from.When 4 CRS antenna ports are transmitted in base station, due to transmitting the port 0 and 1 of CRS on the 1st symbol in existing one complete subframe, the port 2 and port 3 of CRS are transmitted on 2nd symbol, optionally, in step 202, the port 0 and port 1 of CRS are transmitted in primary sign, and the port 2 and port 3 of CRS are transmitted on the 1st symbol after primary sign;Optionally, in step 202, the initiation parameter that the sequence of the CRS transmitted on the 1st symbol after the primary sign and/or the primary sign generates is that the time domain serial number by the 1st symbol after the primary sign and/or the primary sign in PRB carries out scrambling code acquisition.

In one embodiment, the described time-domain position of " the first symbol " in subframe is made an appointment.Wherein, first symbol refers to the symbol that CRS is used for transmission in subframe.

For example, can be according to reference signal pattern, choosing transmission from subframe has a symbol of CRS as above-mentioned " the first symbol ".It preferably, can be using first symbol in subframe as above-mentioned " the first symbol ".

By taking reference signal pattern shown in FIG. 1 as an example, the OFDM symbol in a subframe is expressed as symbol 0 according to timing into 13,1 PRB of symbol from front to back, includes RE 0 to RE 11 according to the sequence of frequency from low to high in 1 OFDM symbol.

If the primary sign of fruit part subframe is symbol 2, transmission has CRS in then symbol 2, and the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 0 transmitted on symbol 2 is identical, i.e., on symbol 0, the port 0 of CRS is mapped on RE 0 and RE 6 and transmits, then the port 0 of CRS is also mapped on RE 0 and RE 6 and transmits on symbol 2;On symbol 0, the port 1 of CRS is mapped on RE 3 and RE 9 and transmits, then the port 1 of CRS is also mapped on RE3 and RE 9 and transmits on symbol 2.Sequence used in the CRS transmitted on symbol 2 may be identical as sequence used in the CRS transmitted on symbol 0;Alternatively, the initiation parameter that the sequence of the CRS transmitted on symbol 2 generates is the time domain serial number l=2 progress scrambling code acquisition by symbol 2 in PRB.

If the primary sign of fruit part subframe is symbol 4, symbol 7 or symbol 11, according to reference signal pattern shown in FIG. 1, it needs to transmit CRS originally in the primary sign, in such cases, the occupied RE of the CRS transmitted in the primary sign can be identical as the occupied RE of the CRS to be transmitted originally;Alternatively, the occupied position RE CRS transmitted on the occupied RE of the CRS transmitted in the primary sign and symbol 0 is identical.Sequence used in the CRS transmitted in the primary sign and the originally CRS to be transmitted Used sequence is identical;Alternatively, sequence used in the CRS transmitted on sequence used in the CRS transmitted in the primary sign and symbol 0 is identical.

If primary sign is other symbols in addition to this, such as symbol 3, then it can determine that the position of CRS transmitted on the position and symbol 0 of the CRS transmitted in the primary sign is identical according to above-mentioned principle;The sequence of CRS transmitted in the sequence of the CRS transmitted in the primary sign and symbol 0 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

Certainly, symbol 4, symbol 7 or the symbol 11 that can also be chosen in Fig. 1 are used as above-mentioned " the first symbol ", the embodiment of the present invention to the position of " the first symbol " of selection with no restriction, as long as transmission has CRS on according to selected by reference signal pattern " the first symbol ".

In another embodiment in above-mentioned process, which is also possible in the time-domain position in subframe according to the time-domain position relationship determination between first symbol and primary sign.

For example, may include following several situations according to the time-domain position relationship between " the first symbol " and primary sign:

Situation 1: first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign.In this way, the position of the CRS transmitted in primary sign, identical as after the primary sign and position that is used for transmission the CRS that the symbol of CRS on is transmitted nearest apart from the primary sign.

By taking reference signal pattern shown in FIG. 1 as an example, the OFDM symbol in a subframe is expressed as symbol 0 according to timing into 13,1 PRB of symbol from front to back, includes RE 0 to RE 11 according to the sequence of frequency from low to high in 1 OFDM symbol.

If the primary sign of fruit part subframe is symbol 1, then because of symbol 4 after symbol 1 and be symbol nearest apart from symbol 1 in all symbols for be used for transmission CRS, the occupied position RE CRS transmitted on the occupied RE of the CRS transmitted in then symbol 1 and symbol 4 is identical, i.e., on symbol 4, the port 0 of CRS is mapped on RE 3 and RE 9 and transmits, then the port 0 of CRS is also mapped on RE 3 and RE 9 and transmits on symbol 1;On symbol 4, the port 1 of CRS is mapped on RE 0 and RE 6 and transmits, then the port 1 of CRS is also mapped on RE 0 and RE 6 and transmits on symbol 1.Symbol Sequence used in the CRS transmitted on number 1 may be identical as sequence used in the CRS transmitted on symbol 4;Alternatively, the initiation parameter that the sequence of the CRS transmitted on symbol 1 generates is the time domain serial number l=1 progress scrambling code acquisition by symbol 1 in PRB.

If the primary sign of fruit part subframe is symbol 2 or symbol 3, then because of symbol 4 after the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 4 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 4 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

Similarly, if the primary sign of fruit part subframe is symbol 5 or symbol 6, then because of symbol 7 after the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 7 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 7 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Further, as the primary sign of fruit part subframe be symbol 5, can forbid on symbol 5 or symbol 5 and 6 transmit UERS;If the primary sign of fruit part subframe is symbol 6, can forbid transmitting UERS on symbol 6.

Similarly, if the primary sign of fruit part subframe is symbol 8, symbol 9 or symbol 10, then because of symbol 11 after the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 11 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 11 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

Similarly, if the primary sign of fruit part subframe is symbol 12 or symbol 13, then because of the symbol 0 of next complete subframe after the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied RE of CRS transmitted in the primary sign and the occupied position RE CRS transmitted on the symbol 0 of next complete subframe are identical.The CRS institute transmitted in the primary sign Sequence used in the sequence used and the CRS transmitted on the symbol 0 of next complete subframe is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Further, as the primary sign of fruit part subframe be symbol 12, can forbid on symbol 12 or symbol 12 and 13 transmit UERS;If the primary sign of fruit part subframe is symbol 13, can forbid transmitting UERS on symbol 13.

Particularly, if the primary sign of fruit part subframe is symbol 0, symbol 4, symbol 7 or symbol 11, then due to according to reference signal pattern, CRS should have been transmitted on these symbols, when then using these symbols as the primary sign of part subframe, these symbols oneself are considered as " being used for transmission in all symbols of CRS symbol after the primary sign and nearest apart from the primary sign " by this, so that the CRS transmitted in the primary sign is consistent with the position for the CRS that should be transmitted on the symbol and sequence when using these symbols as the primary sign of part subframe.

Situation 2: first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign.In this way, the position of the CRS transmitted in primary sign, identical as before the primary sign in the subframe and position that is used for transmission the CRS that the symbol of CRS on is transmitted nearest apart from the primary sign.

By taking reference signal pattern shown in FIG. 1 as an example, the OFDM symbol in a subframe is expressed as symbol 0 according to timing into 13,1 PRB of symbol from front to back, includes RE 0 to RE 11 according to the sequence of frequency from low to high in 1 OFDM symbol.

If the primary sign of fruit part subframe is symbol 1, then because of symbol 0 before symbol 1 and be symbol nearest apart from symbol 1 in all symbols for be used for transmission CRS, the occupied position RE CRS transmitted on the occupied RE of the CRS transmitted in then symbol 1 and symbol 0 is identical, i.e., on symbol 0, the port 0 of CRS is mapped on RE 0 and RE 6 and transmits, then the port 0 of CRS is also mapped on RE 0 and RE 6 and transmits on symbol 1;On symbol 0, the port 1 of CRS is mapped on RE 3 and RE 9 and transmits, then the port 1 of CRS is also mapped on RE 3 and RE 9 and transmits on symbol 1.Sequence used in the CRS transmitted on symbol 1 may be identical as sequence used in the CRS transmitted on symbol 0;Alternatively, the initiation parameter that the sequence of the CRS transmitted on symbol 1 generates is the time domain serial number l=1 progress scrambling code acquisition by symbol 1 in PRB.

If the primary sign of fruit part subframe is symbol 2 or symbol 3, then because of symbol 0 before the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 0 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 0 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

Similarly, if the primary sign of fruit part subframe is symbol 5 or symbol 6, then because of symbol 4 before the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 4 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 4 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Further, as the primary sign of fruit part subframe be symbol 5, can forbid on symbol 5 or symbol 5 and 6 transmit UERS;If the primary sign of fruit part subframe is symbol 6, can forbid transmitting UERS on symbol 6.

Similarly, if the primary sign of fruit part subframe is symbol 8, symbol 9 or symbol 10, then because of symbol 7 before the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 7 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 7 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

Similarly, if the primary sign of fruit part subframe is symbol 12 or symbol 13, then because of symbol 11 before the primary sign and be the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 11 transmitted in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 11 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Further, as the primary sign of fruit part subframe be symbol 12, can forbid on symbol 12 or symbol 12 and 13 transmit UERS; If the primary sign of fruit part subframe is symbol 13, can forbid transmitting UERS on symbol 13.

Particularly, if the primary sign of fruit part subframe is symbol 0, symbol 4, symbol 7 or symbol 11, then due to according to reference signal pattern, CRS should have been transmitted on these symbols, when then using these symbols as the primary sign of part subframe, these symbols oneself are considered as " being used for transmission in all symbols of CRS symbol before primary sign and nearest apart from the primary sign " by this, so that the CRS transmitted in the primary sign is consistent with the position for the CRS that should be transmitted on the symbol and sequence when using these symbols as the primary sign of part subframe.

Situation 3: first symbol is the symbol for being used for transmission CRS that primary sign described in distance is nearest in the subframe.It is identical as distance in the subframe the primary sign nearest position for being used for transmission the CRS transmitted on the symbol of CRS and sequence in this way, position and the sequence of the CRS transmitted in primary sign.

By taking reference signal pattern shown in FIG. 1 as an example, the OFDM symbol in a subframe is expressed as symbol 0 according to timing into 13,1 PRB of symbol from front to back, includes RE 0 to RE 11 according to the sequence of frequency from low to high in 1 OFDM symbol.

If the primary sign of fruit part subframe is symbol 1 or symbol 2, then because symbol 0 is the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 0 that transmit in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 0 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Wherein, the distance between symbol 2 and symbol 4, it is equal with the distance between symbol 0 with symbol 2, so if symbol 2 is primary sign, the position of the CRS transmitted in then symbol 2 both can be identical as the CRS transmitted on symbol 0, can also be identical as the CRS transmitted on symbol 4.

If the primary sign of fruit part subframe is symbol 2, symbol 3 or symbol 5, then because symbol 4 is the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 4 that transmit in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 4 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be to be existed by the primary sign Time domain serial number in PRB carries out scrambling code acquisition.Wherein, when primary sign is symbol 4, due to according to reference signal pattern, it needs to transmit CRS originally on symbol 4, therefore symbol 4 is considered as " being used for transmission the symbol that the distance primary sign is nearest in all symbols of CRS ", and the CRS transmitted on the position of the CRS transmitted on symbol 4 and pattern and symbol 4 specified in reference signal pattern is consistent.Further, as the primary sign of fruit part subframe be symbol 5, can forbid on symbol 5 or symbol 5 and 6 transmit UERS.

Similarly, if the primary sign of fruit part subframe is symbol 6, symbol 7, symbol 8 or symbol 9, then because symbol 7 is the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 7 that transmit in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 7 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Wherein, the distance between symbol 9 and symbol 7, it is equal with the distance between symbol 11 with symbol 9, so if symbol 9 is primary sign, the position of the CRS transmitted in then symbol 9 both can be identical as the CRS transmitted on symbol 7, can also be identical as the CRS transmitted on symbol 11.Further, as the primary sign of fruit part subframe be symbol 6, can forbid on symbol 6 transmit UERS.

Similarly, if the primary sign of fruit part subframe is symbol 10, symbol 11, symbol 12 or symbol 13, then because symbol 11 is the symbol that the distance primary sign is nearest in all symbols for be used for transmission CRS, then the occupied position RE CRS transmitted on the occupied RE of CRS and symbol 11 that transmit in the primary sign is identical.Sequence used in the CRS transmitted in sequence used in the CRS transmitted in the primary sign and symbol 11 is identical or the primary sign on the initiation parameter that generates of the sequence of CRS transmitted be that time domain serial number by the primary sign in PRB carries out scrambling code acquisition.Wherein, when primary sign is symbol 11, due to according to reference signal pattern, it needs to transmit CRS originally on symbol 11, therefore symbol 11 is considered as " being used for transmission the symbol that the distance primary sign is nearest in all symbols of CRS ", and the CRS transmitted on the position of the CRS transmitted on symbol 11 and pattern and the regulation symbol 11 in reference signal pattern is consistent.Further, as the primary sign of fruit part subframe be symbol 12, can forbid on symbol 12 or symbol 12 and 13 transmit UERS;If the primary sign of fruit part subframe is symbol 13, can forbid transmitting UERS on symbol 13.

Further, since the frequency domain position of CRS transmitted on the frequency domain position and " the first symbol " defined above of the CRS transmitted in primary sign is identical, it is located at after the primary sign if that being somebody's turn to do " the first symbol ", then CRS should can be transmitted or no longer transmitted on " the first symbol ", at least 2 symbol transmission CRS in the subframe of principle guarantee part, and guarantee the symbol dispersed arrangement in the time domain of transmission CRS as far as possible.Such as, in above example, if the primary sign of fruit part subframe is symbol 2, the CRS transmitted on the frequency domain position and sequence and symbol 4 of the CRS transmitted on symbol 2 is identical, then due in time domain symbol 4 it is relatively close apart from symbol 2, CRS can be no longer then transmitted on the symbol 4 of the part subframe, and transmits CRS on symbol 7 and symbol 11;If the primary sign of fruit part subframe is symbol 4, the CRS transmitted on the frequency domain position and sequence and symbol 7 of the CRS transmitted on symbol 4 is identical, then can no longer transmit CRS on the symbol 7 of the part subframe, and transmits CRS on symbol 11;For another example, if the primary sign of fruit part subframe is symbol 6, the CRS transmitted on the frequency domain position and sequence and symbol 7 of the CRS transmitted on symbol 6 is identical, then can no longer transmit CRS on the symbol 7 of the part subframe, and transmits CRS on symbol 11;If the primary sign of fruit part subframe is symbol 7, the CRS transmitted on the frequency domain position and sequence and symbol 11 of the CRS transmitted on symbol 7 is identical, then still needs to transmission CRS, on symbol 11 to guarantee to have 2 symbol transmission CRS in the part subframe.

Step 203: transmitting all symbols in the subframe since the primary sign until the last symbol of the subframe terminates in base station.That is, the part subframe is transmitted in base station.

In the step, the position for the reference signal transmitted on the symbol in the part subframe that can be determined according to step 202 and sequence, the transmission of reference signals on the symbol of the part subframe.Control channel and/or data channel can be also transmitted in the part subframe.

As previously mentioned, control channel can be transmitted in primary sign.The control channel can be PDCCH, and the scheduling information of PDSCH is carried in the PDCCH, and the PDSCH can be the PDSCH transmitted in the subframe, is also possible to first subframe after the subframe and the subframe and uploads defeated PDSCH.In this way, if base station sends PDCCH after obtaining the channel right to use exempted from licensed spectrum first, always carrying CRS sequence on PDCCH in process shown in Fig. 2.PDCCH and CRS transmits the fast demodulation for being conducive to PDCCH on the same symbol.Under the CRS especially transmitted in the primary sign of part subframe and the CRS unanimous circumstances transmitted on the symbol made an appointment, can further it drop The complexity of low PDCCH demodulation.

It referring to fig. 4, is the part sub-frame transmission flow diagram provided in an embodiment of the present invention realized in user equipment side.As shown, the process may include following steps:

Step 401: user equipment receives subframe.Wherein, transmission has reference signal on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, and transmission has CRS in the primary sign in the subframe, and the primary sign is first symbol for having data to transmit.

Wherein, the reference signal transmitted in the subframe includes CRS, may also include UERS.The primary sign is a symbol in complete subframe in addition to first symbol, all symbol composition part subframes in the complete subframe since the primary sign until the last symbol of the complete subframe terminates.

It should be understood that the primary sign is that base station starts to transmit first symbol of PDCCH and/or PDSCH and/or EPDCCH.Optionally, when transmitting PDCCH in the primary sign, the scheduling information of PDSCH is carried in the PDCCH, the PDSCH can be the PDSCH transmitted in the subframe, be also possible to the PDSCH transmitted in first after the subframe and the subframe complete subframe.In this way, always carrying CRS sequence on PDCCH if base station sends PDCCH after obtaining the channel right to use exempted from licensed spectrum first.PDCCH and CRS transmits the fast demodulation for being conducive to PDCCH on the same symbol.Under the CRS especially transmitted in the primary sign of part subframe and the CRS unanimous circumstances transmitted on the symbol made an appointment, the complexity of PDCCH demodulation can be further decreased.

Optionally, the primary sign is one in predefined symbol initial position.Optionally, the primary sign that base station determines can be first symbol belonged in predefined symbol initial position set after the right to use of base station acquisition channel.Such as, if predefined symbol initial position collection is combined into No. 0 of a complete subframe, No. 3, No. 7, No. 10 symbol, base station is in the initial time of No. 7 symbol of a complete subframe and the right to use of channel is obtained at the time of between finish time, then the base station can be with determining section molecule start-of-frame number for No. 10 symbol.

Optionally, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.More specifically optionally, base station can obtain the right to use for exempting from the channel of licensed spectrum by the method for competition based on the criterion of LBT; Alternatively, obtaining the right to use for exempting from the channel of licensed spectrum after base station can be by coordinating or dispatching with neighbouring communication equipment;Alternatively, base station can use pattern by preconfigured resource, the right to use for exempting from the channel of licensed spectrum is obtained.

Further, in the case where multiple carrier waves, the primary sign on different carrier waves may be identical.

The position of the reference signal refers to the time domain and/or frequency domain position of reference signal.It is to be understood that the position of reference signal refers to: in 1 PRB, the position of the occupied RE of reference signal.

Optionally, the position of the frequency domain CRS transmitted in primary sign, it is identical as the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in reference signal pattern.Optionally, the sequence of the CRS transmitted in primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission.Optionally, the initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in PRB carries out scrambling code acquisition.

In one embodiment, the time-domain position of described " the first symbol " in the burst is made an appointment.Wherein, first symbol refers to the symbol that CRS is used for transmission in subframe.For example, can be according to reference signal pattern, choosing transmission from subframe has a symbol of CRS as above-mentioned " the first symbol ".It preferably, can be using first symbol in subframe as above-mentioned " the first symbol ".Certainly, symbol 4, symbol 7 or the symbol 11 that can also be chosen in Fig. 1 are used as above-mentioned " the first symbol ", the embodiment of the present invention to the position of " the first symbol " of selection with no restriction, as long as transmission has CRS on according to selected by reference signal pattern " the first symbol ".

In another embodiment in above-mentioned process, which is also possible to determining according to the time-domain position relationship between first symbol and primary sign.For example, may include following several situations according to the time-domain position relationship between " the first symbol " and primary sign:

Situation 1: after primary sign described in first symbol, and being the symbol that is used for transmission CRS nearest apart from the primary sign.In this way, the position of the CRS transmitted in primary sign, identical as after primary sign in the complete subframe and position that is used for transmission the CRS that the symbol of CRS on is transmitted nearest apart from the primary sign.

Situation 2: first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign.In this way, the position of the CRS transmitted in primary sign, with complete subframe In before the primary sign and position that is used for transmission the CRS that the symbol of CRS on is transmitted nearest apart from the primary sign it is identical.

Situation 3: first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.In this way, position and the sequence of the CRS transmitted in primary sign, identical as the nearest position for being used for transmission the CRS transmitted on the symbol of CRS of distance primary sign in complete subframe and sequence.

Optionally, the position for the reference signal transmitted on the symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.

Step 402: the user equipment demodulates the symbol in the subframe since the primary sign until the last symbol of the subframe terminates according to the reference signal.That is, the user equipment demodulates the part subframe according to the reference signal.

Optionally, the user equipment can be timed and offset estimation according to the reference signal transmitted in the part subframe, be demodulated according to the synchronizing information that estimation obtains to the data transmitted in the part subframe.

In above-mentioned process, the received subframe of user equipment institute be can be transmitted by the data transmission stream journey realized in base station side that base station describe according to previous embodiment, therefore more related content can be found in previous embodiment.

By above description it can be seen that, base station determines the primary sign in subframe for carrying out data transmission, and determine the position for needing the reference signal transmitted on the symbol of the last symbol end position from the primary sign to the subframe and sequence, and guarantee to transmit CRS in the primary sign, in this way, for user equipment, it can be timed according to other reference signals transmitted on the symbol after the CRS transmitted in the primary sign and the primary sign and offset estimation, to guarantee the demodulation performance to the data transmitted in the part subframe.The embodiment of the present invention by the position of CRS with part subframe at the beginning of adjust, guarantee that first symbol always has a column CRS, other reference signal positions can remain unchanged.The part subframe mapping method provided according to embodiments of the present invention, LAA eNB can be by way of puncturing (English is puncture) to data come demapping section subframe, to reduce implementation complexity.From the point of view of from the angle of user equipment, the Time and Frequency Synchronization performance of part subframe can be guaranteed, to guarantee demodulation performance.

Above-described embodiment for a clearer understanding of the present invention, below with reference to Fig. 5 A, Fig. 5 B, Fig. 5 C The implementation process under concrete scene is described in detail with Fig. 5 D.Fig. 5 A, Fig. 5 B, Fig. 5 C and Fig. 5 D respectively illustrate a kind of PRB schematic diagram of part subframe.

In the concrete scene, the reference signal pattern in LTE system can be as shown in Figure 1, include 7 OFDM symbols in 1 time slot.

In example shown in Fig. 5 A, the position of the CRS of the always symbol 0 carried on PDCCH and sequence.Specifically, base station carries out channel competition, after competition to channel, determines and starts data transmission on symbol 4, then send PDCCH on symbol 4, CRS sequence and the position of symbol 0 are carried in the PDCCH.User equipment may can detect the PDCCH information of the user equipment when carrying out PDCCH blind Detecting on symbol 4 according to the position and sequence of the CRS on symbol 0, to be demodulated according to the PDSCH that PDCCH testing result transmits the user equipment in the part subframe.

In example shown in Fig. 5 B, the position of the CRS on the always nearest previous symbol for being used for transmission CRS carried on PDCCH and sequence.Specifically, base station carries out channel competition, after competition to channel, determines and starts data transmission on symbol 8, then send PDCCH on symbol 8, CRS sequence and the position of symbol 7 are carried in the PDCCH.User equipment may can detect the PDCCH information of the user equipment when carrying out PDCCH blind examination on symbol 8 according to the position and sequence of the CRS on symbol 7, to be demodulated according to the PDSCH that PDCCH testing result transmits the user equipment in the part subframe.

In example shown in Fig. 5 C, the always nearest the latter carried on PDCCH is used for transmission position and the sequence of the CRS on the symbol of CRS.Specifically, base station carries out channel competition, after competition to channel, determines and starts data transmission on symbol 3, then send PDCCH on symbol 3, CRS sequence and the position of symbol 4 are carried in the PDCCH.User equipment may can detect the PDCCH information of the user equipment when carrying out PDCCH blind examination on symbol 3 according to the position and sequence of the CRS on symbol 4, to be demodulated according to the PDSCH that PDCCH testing result transmits the user equipment in the part subframe.

In example shown in Fig. 5 D, always nearest one carried on PDCCH is used for transmission position and the sequence of the CRS on the symbol of CRS.Specifically, base station carries out channel competition, after competition to channel, determines and starts data transmission on symbol 10, then send PDCCH on symbol 10, CRS sequence and the position of symbol 11 are carried in the PDCCH.User equipment carries out the PDCCH information that the user equipment may can be detected when carrying out PDCCH blind examination on symbol 10 according to the position of the CRS on symbol 11 and sequence, thus according to The PDSCH that PDCCH testing result transmits the user equipment in the part subframe is demodulated.

Optionally, the transmission location of PDCCH should be avoided collides with the position of UERS.Symbol as where the primary sign of fruit part subframe is UERS, such as symbol 5 or symbol 6 are not dispatched in the part subframe using the user equipment based on the UERS transmission mode demodulated then, that is, do not transmit UERS signal in the part subframe.Optionally, the symbol as where the primary sign of fruit part subframe is UERS, such as symbol 5 or symbol 6 then transmit PDCCH in symbol 7.

Based on the same technical idea, the embodiment of the invention also provides the base station that above-mentioned process can be achieved and user equipmenies.

It is a kind of structural schematic diagram of base station provided in an embodiment of the present invention referring to Fig. 6.As shown, base station 600 can realize process shown in Fig. 2.As shown, the base station 600 can include: the first determining module 601, the second determining module 602, transmission module 603, in which:

First determining module 601, for determining that the primary sign in subframe for carrying out data transmission, the primary sign are a symbol in addition to first symbol;

Second determining module 602, for determining position and the sequence of the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein, the base station determines transmission cell special reference CRS in the primary sign;

Transmission module 603 is used for transmission in the subframe all symbols since the primary sign until the last symbol of the subframe terminates.

Preferably, the second determining module 602 is specifically used for: determining that the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign is identical;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

Preferably, first symbol is first symbol in a subframe;It alternatively, first symbol is after the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;It alternatively, first symbol is before the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;Alternatively, first symbol be apart from the primary sign it is nearest for passing The symbol of defeated CRS.

Preferably, the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Alternatively, the initiation parameter that the sequence of the CRS transmitted in the primary sign generates is the time domain serial number progress scrambling code acquisition by the primary sign in Physical Resource Block PRB.

Preferably, the primary sign is one in predefined symbol initial position.

Preferably, PDCCH is also transmitted in the primary sign, and the scheduling information of the PDSCH of the sub-frame transmission is carried in the PDCCH.

Preferably, the second determining module 602 is specifically used for: according to reference signal pattern predetermined, determining position and the sequence of the reference signal transmitted on the symbol after the primary sign.

Preferably, the second determining module 602 is specifically used for: according to reference signal pattern predetermined, judging whether need to transmit UERS in the primary sign;If being judged as YES, forbid transmitting UERS in the primary sign.

Preferably, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

It is a kind of structural schematic diagram of base station provided in an embodiment of the present invention referring to Fig. 7.As shown, base station 700 can realize process shown in Fig. 2.

As shown, the base station 700 can include: transceiver 701, processing unit 702 and memory 703.Processing unit 702 is used for the operation of control base station 700;Memory 703 may include read-only memory and random access memory, for providing instruction and data to processing unit 702.The a part of of memory 703 can also include non-volatile row random access memory (NVRAM).The various components of base station 700 are coupled by bus system, and wherein bus system 709 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 709 in figure.

Transceiver 701 can be multiple element, that is, includes transmitter and transceiver, provide the unit for communicating over a transmission medium with various other devices.

The data transmission stream journey that the base station side that the embodiment of the present invention discloses is realized can be applied in processing unit 702, or be realized by processing unit 702.During realization, the data transmission stream of base station side realization Each step of journey can be completed with the instruction of the integrated logic circuit of the hardware in through the processing unit 702 or software form.Processing unit 702 can be general processor, digital signal processor, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate, and perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be microprocessor or any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 703, and processing unit 702 reads the information in memory 703, completes the data transmission stream journey that base station side is realized in conjunction with its hardware.

Specifically, processing unit 702 can be configured to perform following below scheme:

Determine that the primary sign in subframe for carrying out data transmission, the primary sign are a symbol in addition to first symbol;Determine position and the sequence of the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein the base station, which determines, transmits CRS in the primary sign;All symbols in the subframe since the primary sign until the last symbol of the subframe terminates are transmitted by transceiver 701.

Preferably, it is identical that the frequency domain position of CRS transmitted on the first symbol of CRS is used for transmission in the frequency domain position of the CRS transmitted in the primary sign and reference signal pattern;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

Preferably, first symbol is first symbol in a subframe;It alternatively, first symbol is after the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;It alternatively, first symbol is before the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;Alternatively, first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

Preferably, the sequence of the CRS transmitted in the primary sign is used for transmission the of CRS with described The sequence of the CRS transmitted on one symbol is identical;Alternatively, the initiation parameter that the sequence of the CRS transmitted in the primary sign generates is the time domain serial number progress scrambling code acquisition by the primary sign in PRB.

Preferably, the primary sign is one in predefined symbol initial position.

Preferably, PDCCH is also transmitted in the primary sign, and the scheduling information of the PDSCH of the sub-frame transmission is carried in the PDCCH.

Preferably, when the position for the reference signal that processing unit 702 transmits on symbol until the last symbol of the subframe terminates determining in the subframe since the primary sign and sequence, according to reference signal pattern predetermined, position and the sequence of the reference signal symbol primary sign after on transmitted can be determined.

Preferably, when processing unit 702 determines position and the sequence for the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, it can be according to reference signal pattern predetermined, judge whether need to transmit UERS in the primary sign, if being judged as YES, forbid transmitting UERS in the primary sign.

Preferably, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

It is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention referring to Fig. 8.As shown, user equipment 800 can realize process shown in Fig. 4.As shown, the user equipment 800 can include: receiving module 801, demodulation module 802, in which:

Receiving module 801, for receiving subframe;Wherein, transmission has reference signal on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, and transmission has CRS in the primary sign in the subframe, and the primary sign is first symbol for having data to transmit;

Demodulation module 802, for being demodulated according to the reference signal to the symbol in the subframe since the primary sign until the last symbol of the subframe terminates.

Preferably, it is identical that the frequency domain position of CRS transmitted on the first symbol of CRS is used for transmission in the frequency domain position of the CRS transmitted in the primary sign and reference signal pattern;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

Preferably, first symbol is first symbol in a subframe;It alternatively, first symbol is after the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;It alternatively, first symbol is before the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;Alternatively, first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

Preferably, the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Alternatively, the initiation parameter that the sequence of the CRS transmitted in the primary sign generates is the time domain serial number progress scrambling code acquisition by the primary sign in PRB.

Preferably, the primary sign is one in predefined symbol initial position.

Preferably, PDCCH is also transmitted in the primary sign, and the scheduling information of the PDSCH of the sub-frame transmission is carried in the PDCCH.

Preferably, the position for the reference signal transmitted on the symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.

Preferably, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

It is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention referring to Fig. 9.As shown, user equipment 900 can realize process shown in Fig. 4.As shown, the user equipment 900 can include:

As shown, the user equipment 900 can include: transceiver 901, processing unit 902 and memory 903.Processing unit 902 is used to control the operation of user equipment 900;Memory 903 may include read-only memory and random access memory, for providing instruction and data to processing unit 902.The a part of of memory 903 can also include non-volatile row random access memory (NVRAM).The various components of user equipment 900 are coupled by bus system, and wherein bus system 909 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 909 in figure.

The data transmission stream journey that the user equipment side that the embodiment of the present invention discloses is realized can be applied in processing unit 902, or be realized by processing unit 902.During realization, each step for the data transmission stream journey that user equipment side is realized can be with the integrated logic circuit of the hardware in through the processing unit 902 or soft The instruction of part form is completed.Processing unit 902 can be general processor, digital signal processor, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate, and perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be microprocessor or any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 903, and processing unit 902 reads the information in memory 903, completes the data transmission stream journey that user equipment side is realized in conjunction with its hardware.

Specifically, processing unit 902 can be configured to perform following below scheme:

Receive subframe;Wherein, transmission has reference signal on symbol in the subframe since the primary sign until the last symbol of the subframe terminates, transmission has cell special reference CRS in primary sign in the subframe, and the primary sign is first symbol for having data to transmit;

The symbol in the subframe since the primary sign until the last symbol of the subframe terminates is demodulated according to the reference signal.

Preferably, it is identical that the frequency domain position of CRS transmitted on the first symbol of CRS is used for transmission in the frequency domain position of the CRS transmitted in the primary sign and reference signal pattern;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.

Preferably, first symbol is first symbol in a subframe;It alternatively, first symbol is after the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;It alternatively, first symbol is before the primary sign, and is the symbol that is used for transmission CRS nearest apart from the primary sign;Alternatively, first symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.

Preferably, the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Alternatively, the sequence of the CRS transmitted in the primary sign The initiation parameter of column-generation is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.

Preferably, the primary sign is one in predefined symbol initial position.

Preferably, PDCCH is also transmitted in the primary sign, and the scheduling information of the PDSCH of the sub-frame transmission is carried in the PDCCH.

Preferably, the position for the reference signal transmitted on the symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.

Preferably, the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.

Another embodiment provides a kind of data transmission system, which may include base station and user equipment in above-described embodiment, and specific base station and realizing for user equipment can be with reference to the descriptions of above-described embodiment.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program product.Therefore, the form of complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention.Moreover, the form for the computer program product implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) that one or more wherein includes computer usable program code can be used in the present invention.

The present invention be referring to according to the method for the embodiment of the present invention, the flowchart and/or the block diagram of equipment (system) and computer program product describes.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.Can provide these computer program instructions to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices processor so that the function of specifying in one process or multiple processes and/or block diagrams one box or multiple boxes in flow chart can be achieved by the instruction that the processor of the computer or other programmable data processing devices executes.

These computer program instructions, which may also be stored in, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including command device, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, So that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one box or multiple boxes of one process or multiple processes and/or block diagrams of flow chart.

Although preferred embodiments of the present invention have been described, once a person skilled in the art knows basic creative concepts, then additional changes and modifications may be made to these embodiments.So it includes preferred embodiment and all change and modification for falling into the scope of the invention that the following claims are intended to be interpreted as.

Obviously, those skilled in the art various changes and modifications can be made to the invention without departing from the spirit and scope of the present invention.If then the present invention is also intended to include these modifications and variations in this way, these modifications and changes of the present invention is within the scope of the claims of the present invention and its equivalent technology.

Claims (35)

  1. A kind of data transmission method characterized by comprising
    Base station determines that the primary sign in subframe for carrying out data transmission, the primary sign are a symbol in addition to first symbol;
    The base station determines position and the sequence for the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein, the base station determines transmission cell special reference CRS in the primary sign;
    Transmit all symbols in the subframe since the primary sign until the last symbol of the subframe terminates in the base station.
  2. The method as described in claim 1, which is characterized in that the base station, which determines, transmits CRS in the primary sign, comprising:
    The base station determines that the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign is identical;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.
  3. Method according to claim 2, which is characterized in that first symbol is first symbol in a subframe;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.
  4. Method as claimed in claim 2 or claim 3, which is characterized in that the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or
    The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is by the starting character Time domain serial number number in Physical Resource Block PRB carries out scrambling code acquisition.
  5. Method according to any one of claims 1 to 4, which is characterized in that the primary sign is one in predefined symbol initial position.
  6. Method as described in any one of claims 1 to 5, which is characterized in that go back transmitting physical downlink channel control PDCCH in the primary sign, the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.
  7. Such as method described in any one of claims 1 to 6, which is characterized in that the position for the reference signal that the determination is transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates and sequence, comprising:
    According to reference signal pattern predetermined, position and the sequence of the reference signal transmitted on the symbol after the primary sign are determined.
  8. Method as described in any one of claims 1 to 7, which is characterized in that the base station determines position and the sequence for the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, comprising:
    According to reference signal pattern predetermined, judge whether need to transmit user-specific reference signal UERS in the primary sign;
    If being judged as YES, forbid transmitting UERS in the primary sign.
  9. Such as method described in any item of the claim 1 to 8, which is characterized in that the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.
  10. A kind of data transmission method characterized by comprising
    User equipment receives subframe;Wherein, transmission has reference signal on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, and transmission has CRS in the primary sign in the subframe, and the primary sign is first symbol for having data to transmit;
    The user equipment demodulates the symbol in the subframe since the primary sign until the last symbol of the subframe terminates according to the reference signal.
  11. Method as claimed in claim 10, which is characterized in that the frequency of the CRS transmitted on the first symbol of CRS is used for transmission in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign Domain position is identical;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.
  12. Method as claimed in claim 11, which is characterized in that first symbol is first symbol in a subframe;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.
  13. Method as described in claim 11 or 12, which is characterized in that the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or
    The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.
  14. Method as described in any one of claim 10 to 13, which is characterized in that the primary sign is one in predefined symbol initial position.
  15. Method as described in any one of claim 10 to 14, which is characterized in that go back transmitting physical downlink channel control PDCCH in the primary sign, the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.
  16. Method as described in any one of claim 10 to 15, which is characterized in that the position for the reference signal transmitted on the symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.
  17. Method as described in any one of claim 10 to 16, which is characterized in that the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.
  18. A kind of base station characterized by comprising
    First determining module, for determining in subframe for the primary sign that carries out data transmission, described Beginning symbol is a symbol in addition to first symbol;
    Second determining module, for determining position and the sequence of the reference signal transmitted on the symbol in the subframe since the primary sign until the last symbol of the subframe terminates, wherein, the base station determines transmission cell special reference CRS in the primary sign;
    Transmission module is used for transmission in the subframe all symbols since the primary sign until the last symbol of the subframe terminates.
  19. Base station as claimed in claim 18, which is characterized in that second determining module is specifically used for:
    Determine that the frequency domain position of CRS transmitted on the first symbol for being used for transmission CRS in the frequency domain position and reference signal pattern of the CRS transmitted in the primary sign is identical;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.
  20. Base station as claimed in claim 19, which is characterized in that first symbol is first symbol in a subframe;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign after the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.
  21. Base station as described in claim 19 or 20, which is characterized in that the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or
    The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.
  22. Base station as described in any one of claim 18 to 21, which is characterized in that the primary sign is one in predefined symbol initial position.
  23. Base station as described in any one of claim 18 to 22, which is characterized in that the starting Transmitting physical downlink channel control PDCCH is gone back on symbol, and the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.
  24. Base station as described in any one of claim 18 to 23, which is characterized in that second determining module is specifically used for:
    According to reference signal pattern predetermined, position and the sequence of the reference signal transmitted on the symbol after the primary sign are determined.
  25. Base station as described in any one of claim 18 to 24, which is characterized in that second determining module is specifically used for:
    According to reference signal pattern predetermined, judge whether need to transmit user-specific reference signal UERS in the primary sign;If being judged as YES, forbid transmitting UERS in the primary sign.
  26. Base station as described in any one of claim 18 to 25, which is characterized in that the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.
  27. A kind of user equipment characterized by comprising
    Receiving module, for receiving subframe;Wherein, transmission has reference signal on symbol in the subframe since the primary sign until the last symbol of the subframe terminates, transmission has cell special reference CRS in primary sign in the subframe, and the primary sign is first symbol for having data to transmit;
    Demodulation module, for being demodulated according to the reference signal to the symbol in the subframe since the primary sign until the last symbol of the subframe terminates.
  28. User equipment as claimed in claim 27, which is characterized in that it is identical to be used for transmission the frequency domain position of CRS transmitted on the first symbol of CRS in the frequency domain position of the CRS transmitted in the primary sign and reference signal pattern;Wherein, the time-domain position of first symbol is made an appointment or the time-domain position of first symbol is determined according to the time-domain position relationship between first symbol and the primary sign.
  29. User equipment as claimed in claim 28, which is characterized in that first symbol is first symbol in a subframe;Or
    First symbol after the primary sign is used for apart from the primary sign is nearest Transmit the symbol of CRS;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign before the primary sign;Or
    First symbol is the symbol that is used for transmission CRS nearest apart from the primary sign.
  30. User equipment as described in claim 28 or 29, which is characterized in that the sequence of the CRS transmitted in the primary sign is identical as the sequence of CRS transmitted on the first symbol of CRS of being used for transmission;Or
    The initiation parameter that the sequence of the CRS transmitted in the primary sign generates is that the time domain serial number by the primary sign in Physical Resource Block PRB carries out scrambling code acquisition.
  31. User equipment as described in any one of claim 27 to 30, which is characterized in that the primary sign is one in predefined symbol initial position.
  32. User equipment as described in any one of claim 27 to 31, which is characterized in that go back transmitting physical downlink channel control PDCCH in the primary sign, the scheduling information of the Physical Downlink Shared Channel PDSCH of the sub-frame transmission is carried in the PDCCH.
  33. User equipment as described in any one of claim 27 to 32, which is characterized in that the position for the reference signal transmitted on the symbol after the primary sign and sequence are determined according to reference signal pattern predetermined.
  34. User equipment as described in any one of claim 27 to 33, which is characterized in that the frequency spectrum resource that the subframe occupies is to exempt from licensed spectrum resource.
  35. A kind of data transmission system, including the base station as described in any one of claim 18 to 26 and the user equipment as described in any one of claim 27 to 34.
CN201580071646.1A 2015-08-10 2015-08-14 A kind of data transmission method, device and system CN107113780A (en)

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WO2013113151A1 (en) * 2012-01-31 2013-08-08 富士通株式会社 Signaling indication method for downlink power allocation, base station and user equipment therefor
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