CN104104467A - Downlink data transmission, transmission processing method and device - Google Patents

Abstract

The invention provides a downlink data transmission, a transmission processing method and a device. The transmission method comprises steps of obtaining triggering information for triggering to adopt a designated traditional mode, and transmitting downlink data according to the triggering information adopting the transmission mode corresponding to the triggering information. By adopting the technical method provided by the invention, the technical problems that the reliability of data transmission in a communication system having coverage requirement is not high can be solved so as to guarantee that the terminal device under the environment in which the coverage is low can receive the data information of the base station side and guarantee the normal communication of the terminal device in such environment.

Description

Transmission, method for transmission processing and the device of downlink data

Technical field

The present invention relates to the communications field, especially relate to a kind of transmission, method for transmission processing and device of downlink data.

Background technology

Machine type communication (Machine Type Communication, referred to as MTC) user terminal (MTC User Equipment, be called for short MTC terminal), claim again machine to machine (Machine to Machine, be called for short M2M) user communication device is the main application form of present stage Internet of Things.In recent years, due to Long Term Evolution/senior Long Term Evolution (Long Term Evolution/Long Term Evolution Advance, referred to as LTE/LTE-A) spectrum efficiency high, increasing mobile operator selects the evolution direction of LTE/LTE-A as system of broadband wireless communication.MTC multiple types data service based on LTE/LTE-A also will be more attractive.

The downlink transmission data of existing LTE/LTE-A system is mainly carried by Physical Downlink Shared Channel (Physical Downlink Share Channel, referred to as PDSCH).The correct transmission one of data is to rely on the scheduling of control channel instruction, the 2nd, and the channel estimation results of dependence reference signal.

In MTC, thereby there is a Terminal Type because present position or the limited covering performance that causes of self-characteristic significantly decline.For this Terminal Type, under low overlay environment, need to carry out special coverage enhancement measure.Conventionally the time domain of data service repeats to send, i.e. multiple subframe bundling transmission, and carrying out time domain repetition energy accumulation at receiving terminal is that the most basic lifting covers way.But due to cover promote require raising, in low signal-to-noise ratio interval because channel estimating is no longer accurate, thereby affected the performance of Traffic Channel in the time that time domain repeats.Therefore need to consider how to promote in low signal-to-noise ratio interval the accuracy of channel estimating.Another kind is considered, does not rely on reference signal and carries out coherent demodulation, for example, adopt differential quadrature phase keying (DQPSK) (Differential Quadrature Phase Shift Keying, referred to as DQPSK) to realize, and uses in optic communication device more.In LTE system, not yet proposed to use the scheme of DQPSK.

In addition, in the time that transmission data are control information, the control channel of existing LTE system--Physical Downlink Control Channel (Physical Downlink Control Channel, referred to as PDCCH) need in whole system bandwidth, transmit, and MTC terminal is owing to may using the Base-Band Processing of carrying out that is less than system bandwidth, so probably cannot use PDCCH.For MTC, control channel still can use enhancing Physical Downlink Control Channel (enhanced Physical Downlink Control Channel, referred to as ePDCCH) so.The ePDCCH supporting for LTE R11 version, only supports UE proprietary control information, and the demodulation pilot frequency of support is UE special reference signal (UE-specific reference signals, referred to as DMRS).In the MTC of LTE subject study, only to support transmission mode (Transmission Mode for the low terminal consistent viewpoint that current each company reaches in transmission mode of this cost compare at present, referred to as TM) 1 and 2, in the problem using in pilot tone, DMRS be may not support at present, UE proprietary control information and publicly-owned control information needed to support simultaneously.And in less MTC bandwidth, some less polymerization grades based on strengthening resource unit group (enhanced Resource element Group, referred to as eREG) that agreement is supported at present cannot meet performance requirement for the MTC terminal that has coverage enhancement demand.The design of the ePDCCH based on cell reference signals (Cell-specific reference signals, referred to as CRS) while needing to consider to be applicable to little bandwidth for transmission.The simultaneously single sub-frame dynamic dispatching of control channel instruction also needs to improve under low overlay environment, while having the demand of coverage enhancement, also needs to carry out for control channel the transmission means that multiple subframe time domains repeat.

Therefore for the communication system that has special coverage requirement, need to design one downlink transmission mode more flexibly, to solve the requirement of communication system to data transmission credibility.

For the problems referred to above in correlation technique, effective solution is not yet proposed at present.

Summary of the invention

In correlation technique, not high-technology problem of data transmission credibility in the communication system that has special coverage requirement, the invention provides a kind of transmission, method for transmission processing and device of downlink data, at least to address the above problem.

According to an aspect of the present invention, provide a kind of transmission method of downlink data, be applied to base station, the method comprises: obtain the trigger message that adopts given transmission mode for triggering; Adopt the transmission means transmitting downlink data corresponding with described trigger message according to described trigger message.

Preferably, described trigger message, comprise following one of at least: for transmit described downlink data subframe quantity, for receive described downlink data terminal type, receive the transmission indication signaling that comes from upper strata.

Preferably, the Physical Random Access Channel type that the quantity of described subframe sends according to described terminal is determined.

Preferably, adopt the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message, comprise: in subframe, have CRS transmission and below one of at least in situation, for the Physical Downlink Control Channel ePDCCH strengthening, adopt the transmission means based on CRS to transmit described downlink data: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

Preferably, before the transmission means of employing based on CRS transmitted described downlink data, comprise: to the described downlink data of described ePDCCH carrying, for dividing, resource allocation unit is used in the resource of the described downlink data of transmission with Physical Resource Block (Physical Resource Block, referred to as PRB).

Preferably, taking described PRB as resource allocation unit as the described downlink data of transmission distributes one of following individual PRB:1 PRB, 2 PRB, 3 PRB, 4 PRB, 6 PRB.

Preferably, the control information of described ePDCCH comprises: the business that is used to indicate repeats subframe and controls the transmission time interval that repeats subframe.

Preferably, the initial OFDM symbol of described ePDCCH adopts predefined original position in the time there is no high-level signaling configuration.

Preferably, described original position is one of following: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol.

Preferably, adopt the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message, comprise: below one of at least in situation, in predefined channel set, at least two channels adopt identical transmission means: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

Preferably, described predefined channel set comprises following at least two channels: Physical Downlink Shared Channel PDSCH, the PDSCH that carries publicly-owned data message, primary synchronization channel, auxiliary synchronization channel, the broadcast channel of carrying user proprietary data information.

Preferably, adopt the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message, comprising: adopt time-multiplexed mode to transmit the subframe of described publicly-owned data message and the subframe of described user's proprietary data information; And/or adopt the subframe of the proprietary Downlink Control Information of time-multiplexed mode transmission user and the PDSCH subframe of described user's proprietary data information.

Preferably, when described downlink data transmits in multiple subframes, in predetermined period, the described downlink data taking time domain unit as unit sends, wherein, each described time domain unit comprises M subframe, M is positive integer.

Preferably, described predetermined period comprises N radio frames, and N is positive integer; In described predetermined period, exist one or more for the time domain cell position that sends described downlink data, wherein, only select described in one of them time domain cell position to send described downlink data and each described time domain cell position corresponding to time domain unit described at least one.

Preferably, for transmitting the integral multiple that the quantity of subframe of described user's proprietary data information is 4.

Preferably, from following subframe, select the subframe for transmitting described user's proprietary data information: the 1st subframe, the 2nd subframe, the 3rd subframe, the 4th subframe, the 6th subframe, the 7th subframe, the 8th subframe, the 9th subframe.

Preferably, before the transmission means of employing based on CRS transmitted described downlink data, comprise: below one of at least in situation, adopt differential quadrature phase keying (DQPSK) DQPSK mode to modulate described downlink data to described downlink data: the quantity of described subframe is greater than 1; The type of described terminal is specified type; It is DQPSK that described transmission indication signaling is indicated the modulation system of described downlink data.

Preferably, in the time adopting described DQPSK to modulate described downlink data, the initial reference symbol of use comprises: predefine value or appointment pilot tone.

Preferably, described appointment pilot tone adopts following structure: the Resource Unit RE that each pilot tone port comprises takies RE that the one or more OFDM symbols in data transfer bandwidth, each pilot tone port comprise and one of takies in the part RE in data transfer bandwidth at least.

Preferably, described specified type comprise following one of at least: the terminal of low cost terminals, assigned address, support the terminal of coverage enhancement technology.

According to another aspect of the present invention, provide a kind of method for transmission processing of downlink data, be applied to terminal, having comprised: obtained the trigger message that adopts given transmission mode for triggering; Receive described downlink data according to the transmission means corresponding with described trigger message.

Preferably, described trigger message, comprise following one of at least: the type of Physical Random Access Channel (Physical Random Access Channel, referred to as PRACH) type, described terminal, receive transmission indication signaling.

Preferably, determine the quantity of the subframe that receives described downlink data according to described PRACH type.

Preferably, receive described downlink data according to the transmission means corresponding with described trigger message, comprise: in subframe, have CRS transmission and below one of at least in situation, for the Physical Downlink Control Channel ePDCCH strengthening, adopt the transmission means based on CRS to transmit described downlink data: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

Preferably, the transmission means of employing based on CRS comprises before receiving described downlink data: to the described downlink data of described ePDCCH carrying, be used in the resource that receives described downlink data taking Physical Resource Block PRB as resource allocation unit divides.

Preferably, distribute one of following individual PRB:1 PRB, 2 PRB, 3 PRB, 4 PRB, 6 PRB taking described PRB as resource allocation unit as receiving described downlink data.

Preferably, the initial OFDM symbol of described ePDCCH adopts predefined original position in the time there is no high-level signaling configuration.

Preferably, described original position is one of following: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol.

Preferably, receive described downlink data according to the transmission means corresponding with described trigger message, comprising: below one of at least in situation, at least two channels adopt identical transmission means in predefined channel set: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

Preferably, described channel set comprises following at least two channels: Physical Downlink Shared Channel PDSCH, the PDSCH that carries publicly-owned data message, primary synchronization channel, auxiliary synchronization channel, the broadcast channel of carrying user proprietary data information.

Preferably, receive described downlink data according to the transmission means corresponding with described trigger message, comprise one of following: adopt time-multiplexed mode to receive the subframe of described publicly-owned data message and the subframe of described user's proprietary data information; And/or adopt time-multiplexed mode to receive the subframe of the proprietary Downlink Control Information of user and the PDSCH subframe of described user's proprietary data information.

Preferably, when described downlink data transmits in multiple subframes, in predetermined period, the described downlink data taking time domain unit as unit sends, wherein, each described time domain unit comprises M subframe, M is positive integer.

Preferably, described predetermined period comprises N radio frames, and N is positive integer; In described predetermined period, exist one or morely for sending the time domain cell position of described downlink data, terminal detects described downlink data and each described time domain cell position corresponding to time domain unit described at least one on described time domain cell position.

Preferably, for receiving the integral multiple that the quantity of subframe of described user's proprietary data information is 4.

Preferably, from following subframe, select the subframe for receiving described user's proprietary data information: the 1st subframe, the 2nd subframe, the 3rd subframe, the 4th subframe, the 6th subframe, the 7th subframe, the 8th subframe, the 9th subframe.

Preferably, before the transmission means of employing based on CRS receives described downlink data, comprise: below one of at least in situation, adopt differential quadrature phase keying (DQPSK) DQPSK mode to carry out demodulation to described downlink data to described downlink data: the quantity of described subframe is greater than 1; The type of described terminal is specified type; It is DQPSK that described transmission indication signaling is indicated the modulation system of described downlink data.

Preferably, adopting described DQPSK to separate timing to described downlink data, the initial reference symbol of use comprises: predefine value or appointment pilot tone.

Preferably, described appointment pilot tone adopts following structure: the Resource Unit RE that each pilot tone port comprises takies RE that the one or more OFDM symbols in data transfer bandwidth, each pilot tone port comprise and one of takies in the part RE in data transfer bandwidth at least.

Preferably, described specified type comprise following one of at least: the terminal of low cost terminals, assigned address, support the terminal of coverage enhancement technology.

According to a further aspect of the invention, provide a kind of transmitting device of downlink data, be applied to base station, having comprised: acquisition module, for obtaining the trigger message that adopts given transmission mode for triggering; Transport module, for adopting the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message.

Preferably, described acquisition module, for obtaining the described trigger message that comprises following one of at least information: for transmit described downlink data subframe quantity, for receive described downlink data terminal type, receive the transmission indication signaling that comes from upper strata.

According to a further aspect of the invention, provide a kind of transmission processing device of downlink data, be applied to terminal, this device comprises: acquisition module, for obtaining the trigger message that adopts given transmission mode for triggering; Receiver module, for receiving described downlink data according to the transmission means corresponding with described trigger message.

Preferably, described acquisition module, for obtaining the described trigger message that comprises following one of at least information: the type of Physical Random Access Channel PRACH type, described terminal, the transmission indication signaling receiving.

By the present invention, adopt according to trigger message and trigger the technological means that adopts given transmission mode to transmit downlink data waiting for transmission, solve in correlation technique, not high-technology problem of data transmission credibility in the communication system that has special coverage requirement, thereby ensure that the terminal equipment under low overlay environment can correctly receive the data message of base station side, has ensured the proper communication of this terminal under environment equipment.

Brief description of the drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is according to the flow chart of the transmission method of the downlink data of the embodiment of the present invention 1;

Fig. 2 is another flow chart according to the transmission method of the downlink data of the embodiment of the present invention 1;

Fig. 3 is according to the structured flowchart of the transmitting device of the downlink data of the embodiment of the present invention 1;

Fig. 4 is according to the flow chart of the method for transmission processing of the downlink data of the embodiment of the present invention 2;

Fig. 5 is another flow chart according to the method for transmission processing of the downlink data of the embodiment of the present invention 2;

Fig. 6 is according to the structured flowchart of the transmission processing device of the downlink data of the embodiment of the present invention 2;

Fig. 7 is according to the pattern schematic diagram of the enhancing cell reference signals port m of the embodiment of the present invention;

Fig. 8 is that while coding according to the employing DQPSK of the embodiment of the present invention, initial reference symbol is the schematic diagram of port m;

Fig. 9 is according to the enhancing cell reference signals port 0_1 of the embodiment of the present invention and the pattern schematic diagram of port one _ 1;

Figure 10 is according to the subframe time division multiplexing schematic diagram of the subframe of the publicly-owned data message of transmission of the embodiment of the present invention and transmission bearer user proprietary data information;

Figure 11 is the FDD wireless frame structure schematic diagram that is greater than at 1 o'clock according to the transmission data burst number of the embodiment of the present invention.

Embodiment

Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.

Embodiment 1

Downlink data transmission method in the present embodiment is applied to base station.Fig. 1 is according to the flow chart of the transmission method of the downlink data of the embodiment of the present invention 1.As shown in Figure 1, the method comprises:

Step S102, obtains the trigger message that adopts given transmission mode for triggering;

Step S104, adopts the transmission means transmitting downlink data corresponding with trigger message according to above-mentioned trigger message.

By above-mentioned each treatment step, owing to selecting corresponding transmission means according to the trigger message obtaining, therefore, can select flexibly according to different trigger messages the transmission means of downlink data, especially in the time that the communication environment of above-mentioned trigger message instruction is low overlay environment, can ensure that terminal correctly receives the data that base station sends, thereby reduce under the prerequisite of base station power consumption as far as possible, ensure the proper communication demand of downlink transfer.

In the present embodiment, above-mentioned trigger message, include but not limited to following one of at least: for the quantity of the subframe of transmitting downlink data, for the type of the terminal of downlink data receiving, receive the transmission indication signaling that comes from upper strata.

So far, it is another flow chart according to the transmission method of the downlink data of the embodiment of the present invention 1 that above-mentioned implementation process can show as following implementation: Fig. 2, and as shown in Figure 2, the method comprises

Step S202, following one of at least information that base station obtains downlink data waiting for transmission: sub-frame number, terminal type information or transmission indication signaling;

Step S204, base station is according to the above-mentioned Information Selection data transfer mode of obtaining;

Step S206, base station sends described data according to the transmission means of selecting.

In the present embodiment, definite mode of the quantity of above-mentioned subframe has multiple, the type of the downlink data that for example can send is determined, Physical Random Access Channel (the Physical Random Access Channel that can also send according to terminal, referred to as PRACH) type determine, in the time determining sub-frame number according to PRACH type, can pass through following process implementation:

1. in the time that the front conductivity type Preamble format of PRACH is a kind of new form format5, specified data transmission sub-frame number is greater than 1;

2. in the time that the front conductivity type Preamble format of PRACH is form format1, but base station is that (for example this region is that the MTC terminal for there being coverage enhancement demand is reserved in specific resources region, a specific time-frequency domain resources) receive, specified data transmission sub-frame number is greater than 1.

In step S104, in subframe, there is CRS transmission and below one of at least in situation, for ePDCCH, adopt the transmission means transmitting downlink data based on CRS: the quantity of above-mentioned subframe is greater than 1; The type of terminal is specified type; Receive above-mentioned transmission indication signaling.

In the present embodiment, before adopting the transmission means transmitting downlink data based on CRS, need first allocation of transmission resources, now, to the downlink data of ePDCCH carrying, divide taking Physical Resource Block (PRB) as resource allocation unit the resource that is used in transmitting downlink data.Now, can be that the transmission of above-mentioned downlink data distributes one of following PRB:1 PRB, 2 PRB, 3 PRB, 4 PRB, 6 PRB.

In the present embodiment, in the time adopting ePDCCH to transmit above-mentioned downlink data, the control information of ePDCCH comprises: the business that is used to indicate repeats subframe and controls the transmission time interval that repeats subframe, for example an interval T subframe or radio frames between repetition subframe and the transmitting time point of business repetition subframe can controlled, wherein, T is 0 or positive integer.

In the present embodiment, definite mode of the primary sign of ePDCCH has multiple, for example, can notify by high-level signaling, in the time notifying without high-level signaling, adopts predefined original position.

Above-mentioned original position can be chosen to be any OFDM symbol, in the present embodiment, preferably one of following as original position: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol.

In the present embodiment, below one of at least in situation, in predefined channel set, at least two channels adopt identical transmission means: the quantity of subframe is greater than 1; The type of terminal is specified type.

In above-mentioned channel set, include but not limited to following at least two channels: PDSCH, the PDSCH that carries publicly-owned data message, primary synchronization channel, auxiliary synchronization channel, the broadcast channel of carrying user proprietary data information.

In the present embodiment, can adopt one of following mode to transmit above-mentioned user's proprietary data information and/or above-mentioned publicly-owned data message:

(1) adopt the subframe of time-multiplexed mode transmission user proprietary data information and the subframe of publicly-owned data message;

(2) adopt the subframe of the proprietary Downlink Control Information of time-multiplexed mode transmission user and the PDSCH subframe of user's proprietary data information.

In the present embodiment, when above-mentioned downlink data transmits in multiple subframes, in predetermined period, send downlink data taking time domain unit as unit, wherein, each time domain unit comprises M subframe, and M is positive integer.Above-mentioned predetermined period comprises N radio frames, and N is positive integer; In described predetermined period, exist one or morely for sending the time domain cell position of described downlink data, wherein, only select one of them time domain cell position to send described downlink data and each time domain cell position corresponding at least one time domain unit.

In the present embodiment, can be 4 integral multiple for transmitting the quantity of subframe of above-mentioned user's proprietary data information.Now, from following subframe, select the subframe for transmission user proprietary data information: the 1st subframe, the 2nd subframe, the 3rd subframe, the 4th subframe, the 6th subframe, the 7th subframe, the 8th subframe, the 9th subframe.

In the present embodiment, before adopting the transmission means transmitting downlink data based on CRS, can carry out coded modulation to downlink data, for example: below one of at least in situation, adopt DQPSK mode to modulate downlink data to downlink data: the quantity of subframe is greater than 1; The type of terminal is specified type; The modulation system of transmission indication signaling indicating downlink data is DQPSK.

In the time adopting DQPSK to modulate downlink data, the initial reference symbol of use comprises: predefine value or appointment pilot tone.This appointment pilot tone adopts following structure: the Resource Unit RE that each pilot tone port comprises takies RE that the one or more OFDM symbols in data transfer bandwidth, each pilot tone port comprise and one of takies in the part RE in data transfer bandwidth at least.

It should be noted that, the specified type of above-mentioned terminal include but not limited to following one of at least: the terminal of low cost terminals, assigned address, support the terminal of coverage enhancement technology.Wherein, low cost terminals refers to: cost is lower than LTE UE, and function is less than LTE UE or has the terminal of specific function.

A kind of transmitting device of downlink data is also provided in the present embodiment, and this application of installation, in base station, for realizing above-described embodiment and preferred implementation, had carried out repeating no more of explanation, below the module relating in this device was described.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.Fig. 3 is according to the structured flowchart of the transmitting device of the row data of the embodiment of the present invention 1.As shown in Figure 3, this device comprises:

Acquisition module 30, is connected to transport module 32, for obtaining the trigger message that adopts given transmission mode to transmit downlink data waiting for transmission for triggering;

Transport module 32, for adopting the transmission means transmitting downlink data corresponding with trigger message according to trigger message.

The function realizing by above-mentioned modules, while equally can its communication environment in the instruction of above-mentioned trigger message being low overlay environment, can ensure that terminal correctly receives the data that base station sends, thereby reduce under the prerequisite of base station power consumption as far as possible, ensure the proper communication demand of downlink transfer

In the present embodiment, above-mentioned acquisition module 30, for obtaining the above-mentioned trigger message that comprises following one of at least information: for the quantity of the subframe of transmitting downlink data, for the type of the terminal of downlink data receiving, receive the transmission indication signaling that comes from upper strata.

It should be noted that, the function that above-mentioned modules is realized can realize by one or more processors, and concrete quantity can be selected according to the actual requirements.

Embodiment 2

The present embodiment describes in end side.Fig. 4 is according to the flow chart of the method for transmission processing of the downlink data of the embodiment of the present invention 2.As shown in Figure 4, the method comprises:

Step S402, obtains the trigger message that adopts given transmission mode for triggering;

Step S404, receives above-mentioned downlink data according to the transmission means corresponding with above-mentioned trigger message.

In the present embodiment, above-mentioned trigger message, comprise following one of at least: for the quantity of the subframe of transmitting downlink data, for the type of the terminal of downlink data receiving, receive transmission indication signaling.

So far, it is another flow chart according to the transmission method of the downlink data of the embodiment of the present invention 2 that above-mentioned implementation process can show as following implementation: Fig. 5, and as shown in Figure 5, the method comprises

Step S502, terminal is obtained the data message that comprises following one of at least information: PRACH type, terminal type, transmission indication signaling;

Step S504, terminal is selected data message detection mode according to the above-mentioned data message obtaining;

Step S506, terminal receives described data message according to the Data Detection mode of selecting.

In the present embodiment, the PRACH type sending according to terminal is determined the quantity of the subframe that receives above-mentioned downlink data

In subframe, there is CRS transmission and below one of at least in situation, for ePDCCH, adopt the transmission means downlink data receiving based on CRS: the quantity of subframe is greater than 1; The type of terminal is specified type.

Before the transmission means downlink data receiving adopting based on CRS, to the downlink data of ePDCCH carrying, divide taking Physical Resource Block PRB as resource allocation unit the resource that is used in downlink data receiving.

In the present embodiment, PRB:1 PRB, 2 PRB, 3 PRB, 4 PRB, 6 PRB one of below distributing taking PRB as resource allocation unit as downlink data receiving.

In the present embodiment, the initial receiving symbol of ePDCCH adopts the corresponding OFDM symbol of predefined original position.Above-mentioned original position is one of following: the 1st OFDM symbol, the 3rd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol.

In the present embodiment, below one of at least in situation, predefined channel in conjunction with at least two channels adopt identical transmission means: the quantity of subframe is greater than 1; The type of terminal is specified type; Receive transmission indication signaling.

In the present embodiment, in above-mentioned channel set, include but not limited to following at least two channels: PDSCH, the PDSCH that carries publicly-owned data message, primary synchronization channel, auxiliary synchronization channel, the broadcast channel of carrying user proprietary data information.

In the present embodiment, can adopt time-multiplexed mode to receive the subframe of publicly-owned data message and the subframe of user's proprietary data information; Can also adopt time-multiplexed mode to receive the subframe of the proprietary Downlink Control Information of user and the PDSCH subframe of user's proprietary data information.

In the time that downlink data transmits in multiple subframes, in predetermined period, the described downlink data taking time domain unit as unit sends, wherein, each time domain unit comprises M subframe, M is positive integer.Above-mentioned predetermined period comprises N radio frames, and N is positive integer; In above-mentioned predetermined period, exist one or morely for sending the time domain cell position of downlink data, terminal detects downlink data and each time domain cell position corresponding to time domain unit described at least one on time domain cell position.

In the present embodiment, for receiving the integral multiple that the quantity of subframe of user's proprietary data information is 4.

In the present embodiment, following one of at least subframe for receiving that the subframe of user's proprietary data information comprises radio frames: the 1st subframe, the 2nd subframe, the 3rd subframe,, the 4th subframe, the 6th subframe, the 7th subframe, the 8th subframe, the 9th subframe.

Before adopting transmission means downlink data receiving based on CRS, comprising: below one of at least in situation, adopt DQPSK mode to carry out demodulation to downlink data to downlink data: the quantity of subframe is greater than 1; The type of terminal is specified type; The modulation system of transmission indication signaling indicating downlink data is DQPSK.

Adopting DQPSK to separate timing to downlink data, the initial reference symbol of use comprises: predefine value or appointment pilot tone.This appointment pilot tone adopts following structure: the RE that each pilot tone port comprises takies RE that the one or more OFDM symbols in data transfer bandwidth, each pilot tone port comprise and one of takies in the part RE in data transfer bandwidth at least.Above-mentioned appointment pilot tone can be newly-designed pilot configuration, can be also existing pilot configuration; For the former, pilot frequency sequence can be a predefined class value.

It should be noted that, the specified type of above-mentioned terminal include but not limited to following one of at least: the terminal of low cost terminals, assigned address, support the terminal of coverage enhancement technology.

In the present embodiment, also provide a kind of transmission processing device of downlink data, be applied to terminal, as shown in Figure 6, this device comprises:

Acquisition module 60, is connected to receiver module 62, for obtaining the trigger message that adopts given transmission mode for triggering;

Receiver module 62, for the transmission means downlink data receiving according to corresponding with trigger message.

In the present embodiment, above-mentioned acquisition module 60, for obtaining the trigger message that comprises following one of at least information: for the quantity of the subframe of transmitting downlink data, the type for the terminal of downlink data receiving, the transmission indication signaling receiving.

It should be noted that, the function that above-mentioned modules is realized can realize by corresponding processor.

In order to understand better above-described embodiment, describe in detail below in conjunction with embodiment 3-8.

Embodiment 3

The present embodiment is to FDD(Frequency Division Duplexing, Frequency Division Duplexing (FDD)) or TDD(Time Division Duplexing, time division duplex) under system, downlink transfer adopts method provided by the present invention to be described in detail explanation.

Base station is leading for there being the type of coverage enhancement demand according to the PRACH that receives terminal transmission, the sub-frame number of obtaining transmitting data information is greater than 1, know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following transmission means to send data message, now data message is the service data information being carried on PDSCH channel.Otherwise, select to send data based on the modulation system of Downlink Control Information instruction, and based on CRS pilot demodulated.The concrete treatment step of base station side as shown in Figure 2.

Base station is used DQPSK modulation system to send service data information, adopts simultaneously and strengthens pilot tone.Strengthen pilot tone and adopt newly-designed enhancing cell reference signals, adopting single port and pilot tone port numbers is port m.The RE of pilot tone pattern in a PRB takies as shown in Figure 7, and port m takies 12 RE resources of first OFDM symbol of a PRB.Strengthen cell reference signals simultaneously and transmit in N subframe of a radio frames, now N=10.

In a PRB, the DQPSK initial reference symbol using of encoding is used newly-designed enhancing cell reference signals.Modulating-coding order can be carried out according to the mode of frequency domain after first time domain.While wherein coding in a PRB, l represents OFDM symbolic coding in a RB, and l is [0,13]; K represents a RB sub-carriers numbering, and k is [0,11], now uses Normal CP.Data symbol represents with X, and reference signal represents with R.Shown in coded modulation formula (1) to (4), schematic diagram as shown in Figure 8.

(1) here in the time carrying out publicity and represent, ignore its amplitude, only retain phase information (θ represents phase place).J represents imaginary number i.

θ _k(l)=θ _k(l-1)+△θ _k(l),l=1,2...k=1,2... （2）

$X_k\left(l_0\right)=e^{j{\mathrm{\θ}}_k\left(l_0\right)}=R_k\left(l_0\right)---\left(3\right)$

$X_k\left(l_n\right)=e^{j{\mathrm{\θ}}_k\left(l_n\right)}=X_k\left(l_{n-1}\right)e^{\mathrm{j\Δ}{\mathrm{\θ}}_k\left(l_n\right)}=R_k\left(l_0\right)e^{\mathrm{j\Δ}{\mathrm{\θ}}_k\left(l_1\right)}...e^{\mathrm{j\Δ}{\mathrm{\θ}}_k\left(l_n\right)}---\left(4\right)$

The DQPSK phase code using of encoding is as shown in table 1.

Table 1:DQPSK differential phase coding

The pilot frequency sequence using adopts the pseudo random sequence of existing protocol definition.While sending enhancing pilot tone, do not send cell reference signals.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, the type of terminal own is predefined type 1 simultaneously, support the terminal of coverage enhancement technology, select following detection mode receiving data information, now data message is the service data information being carried in PDSCH.Otherwise, adopt the demodulation mode based on Downlink Control Information instruction.The treatment step of end side as shown in Figure 4.

Terminal adopts DQPSK demodulation mode, and terminal adopts non-coherent demodulation mode simultaneously, and terminal is according to strengthening the demodulation primary sign of cell reference signals as DQPSK, and port numbers is port m.

Owing to now using non-coherent demodulation mode, strengthen cell reference signals only as the demodulation primary sign of DQPSK, be not used as demodulated reference signal.

If transmitted signal is X in a RB _k(l), channel is noise is N _k(l), receiving signal can be expressed as:

Definition:

Z _k(l)=R _k(l)R _k ^*(l-1)

Mapping mode described in employing table 1, coded-bit b _k,l(0) b _k,l(1) corresponding soft decision information is respectively: Re (Z _k(l)), IM (Z _k(l)).Now the judgment rule of decoder is >0, is judged to 1, otherwise is judged to 0.

The present embodiment is by the time of downlink transmission data information, adopt and strengthen cell reference signals and adopt DQPSK coded system, under the lower prerequisite of communication link signal to noise ratio, can ensure MTC terminal equipment under low overlay environment can and the proper communication demand of base station side.

Embodiment 4

The present embodiment is under FDD or TDD system, and downlink transfer adopts method provided by the present invention to be described in detail explanation.

Base station is leading according to the PRACH that receives terminal transmission is the type that has coverage enhancement demand, and the sub-frame number of obtaining transmitting data information is greater than 1, and concrete is to amount to 16 subframes at subframe #1, #2, #3, the #4 of 4 continuous radio frames.Select following transmission means to send data, now data message is the service data information being carried on PDSCH channel.Otherwise, select to send data based on the modulation system of Downlink Control Information instruction.The concrete treatment step of base station side as shown in Figure 2.

Base station is used DQPSK modulation system to send service data information, adopts existing pilot tone simultaneously.Pilot tone adopts cell reference signals, and adopting transmission mode 2 and pilot tone port numbers is port0 and 1.

In a PRB, the initial reference symbol that DQPSK coding uses is used predefine value.Modulating-coding order can be according to the mode of frequency domain after first time domain or according to the mode of time domain after first frequency domain.While wherein coding in a PRB, coding principle is with embodiment 3, and different the used initial reference signal R that are are predefined as the dibit information of acquiescence, and preferably 01 or 10.DQPSK encodes the phase code that uses as shown in table 1 in embodiment 3.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, selects following detection mode receiving data information, and now data message is the service data information being carried in PDSCH.Otherwise, adopt the demodulation mode based on Downlink Control Information instruction.The treatment step of end side as shown in Figure 4.

Terminal adopts DQPSK demodulation mode, and terminal adopts coherent demodulation mode simultaneously, and the pilot tone port numbers of use is port0 and 1.

Owing to now using coherent demodulation mode, cell reference signals is as demodulated reference signal.Terminal is carried out DQPSK demodulation according to the demodulation primary sign of the result after coherent demodulation and predefined DQPSK, demodulation principle is with identical described in embodiment 3, difference is that initial reference signal R is predefined as the dibit information of acquiescence, preferably 01 or 10.

The present embodiment by the time of downlink transmission data information, adopts cell reference signals and adopts DQPSK coded system, under the lower prerequisite of communication link noise, can ensure MTC terminal equipment energy under low overlay environment and the proper communication demand of base station side.

Embodiment 5

The present embodiment is under FDD or TDD system, and downlink transfer adopts method provided by the present invention to be described in detail explanation.

Base station is leading for there being the type of coverage enhancement demand according to the PRACH that receives terminal transmission, the sub-frame number of obtaining transmitting data information is greater than 1(, and now the structure of FDD radio frames can be shown in Figure 11), concrete is to amount to 16 subframes at subframe #1, #2, #3, #4, #6, #7, #8, the #9 of 2 continuous radio frames.Know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following transmission means to send data, now data message is the control information being carried on ePDCCH channel.Otherwise, select to send ePDCCH based on the transmission means of the proprietary demodulation pilot frequency of user.The concrete treatment step of base station side as shown in Figure 2.

Now base station is used the transmission means based on cell reference signals to send control information, and adopts simultaneously and strengthens pilot tone.Strengthen pilot tone and adopt newly-designed enhancing cell reference signals, adopting transmission diversity transmission mode and pilot tone port numbers is port0_1port1_1.The RE of pilot tone pattern in a PRB takies as shown in Figure 9.

Being produced as of sequence:

$r_{l,n_s}\left(m\right)=\frac{1}{\sqrt{2}}(1-2\·c\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+1)),m=\mathrm{0,1},...,2N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1$

C represents pseudo random sequence, and r is the pilot frequency sequence producing according to pseudo random sequence, and j is imaginary number i.

Sequence is mapped as to RE resource:

represent pilot tone port, n _srepresent time slot;

Mapping position is:

k=6m+(v+v _shift)mod6

$l=\mathrm{0,1,2},N_{\mathrm{symb}}^{\mathrm{DL}}-3,N_{\mathrm{symb}}^{\mathrm{DL}}-2,N_{\mathrm{symb}}^{\mathrm{DL}}-1p,p\∈\left\{\mathrm{0,1}\right\}$

$m=N_{\mathrm{RB}}^{\mathrm{DL}}-6,N_{\mathrm{RB}}^{\mathrm{DL}}-5,...,N_{\mathrm{RB}}^{\mathrm{DL}}+1,N_{\mathrm{RB}}^{\mathrm{DL}}+5$

Wherein $m^{\′}=m+N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-N_{\mathrm{RB}}^{\mathrm{DL}}$

represent physical district ID. represent maximum downstream bandwidth RB number. represent downlink bandwidth RB number. represent an OFDM number of symbols that descending time slot is corresponding.

The value of v is $v=\left\{\begin{array}{cc}0& \mathrm{ifp}=0\mathrm{andl}=0\\ 5& \mathrm{ifp}=0\mathrm{andl}=1\\ 4& \mathrm{ifp}=0\mathrm{andl}=2\\ 3& \mathrm{ifp}=0\mathrm{andl}=N_{\mathrm{symb}}^{\mathrm{DL}}-3\\ 2& \mathrm{ifp}=0\mathrm{andl}=N_{\mathrm{symb}}^{\mathrm{DL}}-2\\ 1& \mathrm{ifp}=0\mathrm{andl}=N_{\mathrm{symb}}^{\mathrm{DL}}-1\\ 3& \mathrm{ifp}=1\mathrm{andl}=0\\ 2& \mathrm{ifp}=1\mathrm{andl}=1\\ 1& \mathrm{ifp}=1\mathrm{andl}=2\\ 0& \mathrm{ifp}=0\mathrm{andl}=N_{\mathrm{symb}}^{\mathrm{DL}}-3\\ 5& \mathrm{ifp}=0\mathrm{andl}=N_{\mathrm{symb}}^{\mathrm{DL}}-2\\ 4& \mathrm{ifp}=0\mathrm{andl}=N_{\mathrm{symb}}^{\mathrm{DL}}-1\end{array}\right.$

Strengthen cell reference signals simultaneously and transmit in N subframe of a radio frames, while being specially FDD, N=4 comprises subframe #1, #2, #3, #4; When TDD, N=2 comprises subframe #4, #9 when uplink-downlink configuration 1.

Control information is carried on and strengthens in Physical Downlink Control Channel, and this channel adopts centralized or distributed transmission, preferably localized transmission.In the time of 1.4MHz bandwidth for transmission, support that polymerization grade is L=2,4,8,16,24 simultaneously.Only support a PRBset, and the PRB number that this set supports is N=2,4,6.Corresponding search volume is:

Wherein case1,2,3 is applicable to respectively the MTC UE of coverage enhancement demand, the MTC UE without coverage enhancement demand, other situations.

When now base station side is used Case1, the PRB set of N=6 uses polymerization grade 24 bear control information simultaneously.

In addition, control information at least comprises the fixed time interval of controlling repetition subframe and business repetition subframe.Original transmission subframe is notified by physical layer signaling, is carried on and strengthens in host system message block.Original transmission symbol is fixing from the 4th OFDM sign-on.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following detection mode receiving data information, now data message is the control information being carried in ePDCCH.Otherwise, select the transmission means demodulation ePDCCH based on the proprietary demodulation pilot frequency of user.The treatment step of end side as shown in Figure 2.

Terminal will be according to strengthening cell reference signals demodulation control information, and port numbers is port0_1port1_1.

Terminal is carried out respectively L=4,8,16, the corresponding Candidate Set demodulation checking of 24 polymerization grade, controlled information in search volume.

The present embodiment by the time of downlink transfer control information, adopts and strengthens cell reference signals, under the lower prerequisite of communication link signal to noise ratio, can ensure MTC terminal equipment energy under low overlay environment and the proper communication demand of base station side.

Embodiment 6

The present embodiment is under FDD or TDD system, and downlink transfer adopts method provided by the present invention to be described in detail explanation.

Base station is leading according to the PRACH that receives terminal transmission is the type that has coverage enhancement demand, and the sub-frame number of obtaining transmitting data information is greater than 1, and concrete is to amount to 8 subframes at subframe #1, #2, #3, the #4 of 2 continuous radio frames.Select following transmission means to send data, now data message is the control information being carried on ePDCCH channel.Otherwise, select to send ePDCCH based on the transmission means of the proprietary demodulation pilot frequency of user.The concrete treatment step of base station side as shown in Figure 2.

Now base station is used the transmission means based on cell reference signals to send control information.Pilot tone adopts cell reference signals, and adopting pilot tone port numbers is port0 and 1.

Control information is carried on and strengthens in Physical Downlink Control Channel, and this channel adopts centralized or distributed transmission, and preferably localized transmission is used the transmission diversity transmission mode based on CRS simultaneously.In the time of 1.4MHz bandwidth for transmission, support the polymerization grade taking PRB as unit simultaneously, be specially L=1,2,3,4,6.Only support a PRB set, and the PRB number that this set supports is N=2,4,6.Corresponding search volume is:

Wherein case1,2,3 is applicable to respectively the MTC UE of coverage enhancement demand, the MTC UE without coverage enhancement demand, other situations.

When now base station side is used Case1, the PRB set of N=4 uses polymerization grade 2 bear control information simultaneously.

In addition, original transmission symbol is fixing from the 4th OFDM sign-on.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following detection mode receiving data information, now data message is the control information being carried in ePDCCH.Otherwise, select the transmission means demodulation ePDCCH based on the proprietary demodulation pilot frequency of user.The treatment step of end side as shown in Figure 4.

Terminal will be according to cell reference signals with transmission diversity mode demodulation control information, and port numbers is port0 and 1.

Terminal is carried out respectively L=1,2,3,4, the corresponding Candidate Set demodulation checking of 6 polymerization grade, controlled information in search volume.

The present embodiment by the time of downlink transfer control information, adopts cell reference signals, under the prerequisite of the little bandwidth communication of application, can ensure MTC terminal equipment cheaply can and the proper communication demand of base station side.

Embodiment 7

The present embodiment is under FDD or TDD system, and downlink transfer adopts method provided by the present invention to be described in detail explanation.

Base station is leading according to the PRACH that receives terminal transmission is the type that has coverage enhancement demand, and the sub-frame number of obtaining transmitting data information is greater than 1, and concrete is: send in the control information of carrying out 4 time domain unit taking N radio frames as the cycle.Each time domain unit comprises a continuous M subframe, and N, M are positive integer.In this embodiment, N is that 20, M is 4.Select following transmission means to send data, now data message is the control information being carried on ePDCCH channel.Otherwise, select to send ePDCCH based on the transmission means of the proprietary demodulation pilot frequency of user.The concrete treatment step of base station side as shown in Figure 2.

Now base station is used the transmission means based on cell reference signals to send control information.Pilot tone adopts cell reference signals, and adopting pilot tone port numbers is port0 and 1.

Control information is carried on and strengthens in Physical Downlink Control Channel, and this channel adopts centralized or distributed transmission, and preferably localized transmission is used the transmission diversity transmission mode based on CRS simultaneously.In the time of 1.4MHz bandwidth for transmission, support the polymerization grade taking PRB as unit simultaneously, be specially L=1,2,3,4,6.Only support a PRB set, and the PRB number that this set supports is N=2,4,6.Corresponding search volume is:

Wherein case1,2,3 is applicable to respectively the MTC UE of coverage enhancement demand, the MTC UE without coverage enhancement demand, other situations.

When now base station side is used Case1, the PRB set of N=4 uses polymerization grade 2 bear control information simultaneously.

In addition, original transmission symbol is fixing from the 4th OFDM sign-on.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following detection mode receiving data information, now data message is the control information being carried in ePDCCH.Otherwise, select the transmission means demodulation ePDCCH based on the proprietary demodulation pilot frequency of user.The treatment step of end side as shown in Figure 4.

Terminal receives in the control information of carrying out 4 time domain unit taking 20 radio frames as the cycle, since first radio frames in the cycle, carries out successively the control information blind Detecting of 4 time domain unit, and each time domain unit comprises 4 continuous subframes, altogether detects 10 times.Be terminal the 1st time subframe #1,2,3 that detects the 1st radio frames, 4 and the subframe #1,2,3 of subframe #6,7,8,9 and the 2nd radio frames, 4 and subframe #6,7,8,9, if detected correctly, stop incorrectly proceeding the 2nd time and detecting.The subframe #1,2,3,4 and the subframe #1,2,3 of subframe #6,7,8,9 and the 4th radio frames, 4 and subframe #6,7,8,9 that detects the 3rd radio frames for the 2nd time, detects at most to the 10th time if still detect mistake.

Terminal will be according to cell reference signals with transmission diversity mode demodulation control information, and port numbers is port0 and 1.

Terminal is carried out respectively L=1,2,3,4, the corresponding Candidate Set demodulation checking of 6 polymerization grade, controlled information in search volume.Or fix and detect with L=2.

The present embodiment by the time of downlink transfer control information, adopts cell reference signals, under the prerequisite of the little bandwidth communication of application, can ensure MTC terminal equipment cheaply can and the proper communication demand of base station side.

Embodiment 8

The present embodiment is under FDD or TDD system, and downlink transfer adopts method provided by the present invention to be described in detail explanation.

The transmission indication signaling of physical layer is issued in base station according to upper strata, select following transmission means to send data, now when data message is control information and while being carried on ePDCCH channel, select to send ePDCCH based on the transmission means of cell reference signals, otherwise, select to send ePDCCH based on the transmission means of the proprietary demodulation pilot frequency of user; When data message is service data information and while being carried on PDSCH channel, select based on the transmission of DQPSK modulation system, otherwise, select to transmit based on QPSK modulation system.The concrete treatment step of base station side as shown in Figure 2.

Now from frame structure, the subframe that in community, publicly-owned information takies in each radio frames be k1, k2 ..., kn, data burst and control subframe take at each radio frames interval x1, x2 ..., xn, as shown in figure 10.At every spacer segment xi, i=1,2 ..., in a n subframe, the subframe of carrying ePDCCH channel takies yi, the subframe of carrying PDSCH channel takies zi, and meets xi >=yi >=0, xi >=zi >=0.

Now base station is used the transmission means based on cell reference signals to send ePDCCH.Pilot tone adopts cell reference signals, and adopting transmission means and the pilot tone port numbers of transmission diversity is port0 and 1.Base station is used DQPSK modulation system to send PDSCH, adopts cell reference signals simultaneously, and adopting transmission mode 1 and pilot tone port numbers is port0.

In a PRB, business information is used DQPSK modulation after chnnel coding, and the initial reference symbol that coding uses is used predefine value.Modulating-coding order can be according to the mode of frequency domain after first time domain or according to the mode of time domain after first frequency domain.While wherein coding in a PRB, coding principle is with embodiment 3, and different the used initial reference signal R that are are predefined as the dibit information of acquiescence, and preferably 01 or 10.DQPSK encodes the phase code that uses as shown in table 1 in embodiment 3.

Control information is carried on and strengthens in Physical Downlink Control Channel, and this channel adopts centralized or distributed transmission, preferably localized transmission.In the time of 1.4MHz bandwidth for transmission, support the polymerization grade taking PRB as unit simultaneously, be specially L=1,2,3,4,6.Only support a PRB set, and the PRB number that this set supports is N=2,4,6.Corresponding search volume is:

Wherein case1,2,3 is applicable to respectively the MTC UE of coverage enhancement demand, the MTC UE without coverage enhancement demand, other situations.

When now base station side is used Case1, the PRB set of N=6 uses polymerization class 6 bear control information simultaneously.

In addition, original transmission symbol is fixing from the 4th OFDM sign-on.

Meanwhile, control information comprises instruction and controls the fixed time interval T that repeats subframe and business repetition subframe, T=0, and and then data burst transmission original position controls subframe.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following detection mode receiving data information, now when data message is control information and while being carried on ePDCCH channel, select the transmission means demodulation ePDCCH based on cell reference signals, otherwise, the transmission means demodulation ePDCCH based on the proprietary demodulation pilot frequency of user selected; When data message is service data information and while being carried on PDSCH channel, select based on the transmission of DQPSK modulation system, otherwise, select to transmit based on QPSK modulation system.The treatment step of end side as shown in Figure 4.

Terminal will be according to cell reference signals with transmission diversity mode demodulation ePDCCH, and port numbers is port0 and 1.

Terminal is carried out respectively L=1,2,3,4, the corresponding Candidate Set demodulation checking of 6 polymerization grade, controlled information in search volume.Obtain after control information, know that data burst will an interval T subframe transmit after control subframe, now T=0.

Terminal adopts DQPSK demodulation mode demodulation PDSCH, and terminal adopts non-coherent demodulation mode simultaneously.

Owing to now using non-coherent demodulation mode, cell reference signals is not used as demodulated reference signal.Terminal is carried out DQPSK demodulation according to the demodulation primary sign of predefined DQPSK, and demodulation principle is with identical described in embodiment 3, and difference is that initial reference signal R is predefined as the dibit information of acquiescence, and preferably 01 or 10.

The present embodiment transmits Downlink Control Information and service data information by time division multiplexing mode, adopts cell reference signals, under the prerequisite of the little bandwidth communication of application, can ensure MTC terminal equipment cheaply can and the proper communication demand of base station side.

Embodiment 9

The present embodiment is under FDD or TDD system, and downlink transfer adopts method provided by the present invention to be described in detail explanation.

Base station is leading for there being the type of coverage enhancement demand according to the PRACH that receives terminal transmission, the sub-frame number of obtaining transmitting data information is greater than 1, and concrete is to amount to 80 subframes at subframe #1, #2, #3, #4, #6, #7, #8, the #9 of 10 continuous radio frames.Each radio frames schematic diagram as shown in figure 10.Select following transmission means to send data, now data message is the control information being carried on ePDCCH channel.Otherwise, select to send ePDCCH based on the transmission means of the proprietary demodulation pilot frequency of user.The concrete treatment step of base station side as shown in Figure 2.

In a PRB, control information is used DQPSK modulation after chnnel coding, and the initial reference symbol that coding uses is used predefine value.Modulating-coding order can be according to the mode of frequency domain after first time domain or according to the mode of time domain after first frequency domain.While wherein coding in a PRB, coding principle is with embodiment 3, and different the used initial reference signal R that are are predefined as the dibit information of acquiescence, and preferably 01 or 10.

Base station is used the transmission means based on CRS to send control information.Pilot tone adopts cell reference signals, and adopting pilot tone port numbers is port0 and 1.And control information is used DQPSK modulation system.

Control information is carried on and strengthens in Physical Downlink Control Channel, and this channel adopts centralized or distributed transmission, and preferably localized transmission is used the transmission diversity transmission mode based on CRS simultaneously.In the time of 1.4MHz bandwidth for transmission, support the polymerization grade taking PRB as unit simultaneously, be specially L=1,2,3,4,6.Only support a PRB set, and the PRB number that this set supports is N=2,4,6.Corresponding search volume is:

Wherein case1,2,3 is applicable to respectively the MTC UE of coverage enhancement demand, the MTC UE without coverage enhancement demand, other situations.

When now base station side is used Case1, the PRB set of N=6 uses polymerization grade 2 bear control information simultaneously.

In addition, original transmission symbol is fixing from the 4th OFDM sign-on.

Terminal is obtained and sent PRACH type is support coverage enhancement technology leading, know that terminal type is predefined type 1 simultaneously, for supporting the terminal of coverage enhancement technology, select following detection mode receiving data information, now data message is the control information being carried in ePDCCH.Otherwise, select the transmission means demodulation ePDCCH based on the proprietary demodulation pilot frequency of user.The treatment step of end side as shown in Figure 4.

Terminal adopts DQPSK demodulation mode, and terminal adopts non-coherent demodulation mode simultaneously.

Terminal is carried out respectively L=1,2,3,4, the corresponding Candidate Set demodulation checking of 6 polymerization grade, controlled information in search volume.

Owing to now using non-coherent demodulation mode, do not use cell reference signals as demodulated reference signal.Terminal is carried out DQPSK demodulation according to the demodulation primary sign of predefined DQPSK.In a PRB, demodulation principle is with described in embodiment 3, and difference is that initial reference signal R is predefined as the dibit information of acquiescence, and preferably 01 or 10.

The present embodiment by the time of downlink transfer control information, adopts cell reference signals, and that before the little bandwidth of application, communicates by letter puts, can ensure MTC terminal equipment cheaply can and the proper communication demand of base station side.

Can find out by above-described embodiment, the embodiment of the present invention has realized following beneficial effect:

The terminal equipment that can ensure to be deployed under low overlay environment can correctly receive base station side data message and control information, do not increase in operator under the prerequisite of disposing the extra expensive equipment such as website, relay station, reduce the energy expense that continues repetition transmission times and bring, improve downlink resource service efficiency, ensure this type of terminal equipment proper communication.

In another embodiment, also provide a kind of software, the technical scheme that this software is described for carrying out above-described embodiment and preferred implementation.

In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.

Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.

These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (43)

1. a transmission method for downlink data, is applied to base station, it is characterized in that, comprising:

Obtain the trigger message that adopts given transmission mode for triggering;

Adopt the transmission means transmitting downlink data corresponding with described trigger message according to described trigger message.

2. method according to claim 1, is characterized in that, described trigger message, comprise following one of at least:

For transmit described downlink data subframe quantity, for receive described downlink data terminal type, receive and come from the transmission indication signaling on upper strata.

3. method according to claim 2, is characterized in that, the Physical Random Access Channel type that the quantity of described subframe sends according to described terminal is determined.

4. method according to claim 2, is characterized in that, adopts the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message, comprising:

In subframe, there is CRS transmission and below one of at least in situation, for the Physical Downlink Control Channel ePDCCH strengthening, adopt the transmission means based on CRS to transmit described downlink data: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

5. method according to claim 4, is characterized in that, the transmission means of employing based on CRS comprises before transmitting described downlink data:

To the described downlink data of described ePDCCH carrying, be used in the resource of the described downlink data of transmission taking Physical Resource Block PRB as resource allocation unit divides.

6. method according to claim 5, is characterized in that, taking described PRB as resource allocation unit as the described downlink data of transmission distributes one of following individual PRB:

1 PRB, 2 PRB, 3 PRB, 4 PRB, 6 PRB.

7. method according to claim 4, is characterized in that, the control information of described ePDCCH comprises: the business that is used to indicate repeats subframe and controls the transmission time interval that repeats subframe.

8. method according to claim 4, is characterized in that, the initial OFDM symbol of described ePDCCH adopts predefined original position in the time there is no high-level signaling configuration.

9. method according to claim 4, is characterized in that, described original position is one of following:

The 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol.

10. method according to claim 2, is characterized in that, adopts the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message, comprising:

Below one of at least in situation, in predefined channel set, at least two channels adopt identical transmission means: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

11. methods according to claim 10, is characterized in that, described predefined channel set comprises following at least two channels:

Physical Downlink Shared Channel PDSCH, the PDSCH that carries publicly-owned data message, primary synchronization channel, auxiliary synchronization channel, the broadcast channel of carrying user proprietary data information.

12. methods according to claim 2, is characterized in that, adopt the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message, comprising:

Adopt time-multiplexed mode to transmit the subframe of described publicly-owned data message and the subframe of described user's proprietary data information; And/or

Adopt the subframe of the proprietary Downlink Control Information of time-multiplexed mode transmission user and the PDSCH subframe of described user's proprietary data information.

13. methods according to claim 2, is characterized in that, when described downlink data transmits in multiple subframes, and in predetermined period, the described downlink data taking time domain unit as unit sends, wherein, each described time domain unit comprises M subframe, M is positive integer.

14. according to method described in claim 13, it is characterized in that, described predetermined period comprises N radio frames, and N is positive integer; In described predetermined period, exist one or more for the time domain cell position that sends described downlink data, wherein, only select described in one of them time domain cell position to send described downlink data and each described time domain cell position corresponding to time domain unit described at least one.

15. methods according to claim 12, is characterized in that, for transmitting the integral multiple that the quantity of subframe of described user's proprietary data information is 4.

16. methods according to claim 15, is characterized in that, select the subframe for transmitting described user's proprietary data information from following subframe:

The 1st subframe, the 2nd subframe, the 3rd subframe, the 4th subframe, the 6th subframe, the 7th subframe, the 8th subframe, the 9th subframe.

17. methods according to claim 2, it is characterized in that, adopt before transmission means based on CRS transmits described downlink data, comprising: below one of at least in situation, adopt differential quadrature phase keying (DQPSK) DQPSK mode to modulate described downlink data to described downlink data:

The quantity of described subframe is greater than 1; The type of described terminal is specified type; It is DQPSK that described transmission indication signaling is indicated the modulation system of described downlink data.

18. methods according to claim 17, is characterized in that, in the time adopting described DQPSK to modulate described downlink data, the initial reference symbol of use comprises: predefine value or appointment pilot tone.

19. methods according to claim 18, is characterized in that, described appointment pilot tone adopts following structure:

The Resource Unit RE that each pilot tone port comprises takies RE that the one or more OFDM symbols in data transfer bandwidth, each pilot tone port comprise and one of takies in the part RE in data transfer bandwidth at least.

20. according to the method described in any one in claim 4,10 and 17, it is characterized in that, described specified type comprise following one of at least:

The terminal of low cost terminals, assigned address, the terminal of support coverage enhancement technology.

The method for transmission processing of 21. 1 kinds of downlink datas, is applied to terminal, it is characterized in that, comprising:

Obtain the trigger message that adopts given transmission mode for triggering;

Receive described downlink data according to the transmission means corresponding with described trigger message.

22. methods according to claim 21, is characterized in that, described trigger message, comprise following one of at least:

The type of Physical Random Access Channel PRACH type, described terminal, receive transmission indication signaling.

23. methods according to claim 22, is characterized in that, determine the quantity of the subframe that receives described downlink data according to described PRACH type.

24. methods according to claim 22, is characterized in that, receive described downlink data according to the transmission means corresponding with described trigger message, comprising:

In subframe, there is CRS transmission and below one of at least in situation, for the Physical Downlink Control Channel ePDCCH strengthening, adopt the transmission means based on CRS to transmit described downlink data: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

25. methods according to claim 24, is characterized in that, the transmission means of employing based on CRS comprises before receiving described downlink data:

To the described downlink data of described ePDCCH carrying, be used in the resource that receives described downlink data taking Physical Resource Block PRB as resource allocation unit divides.

26. methods according to claim 25, is characterized in that, distribute one of following individual PRB taking described PRB as resource allocation unit as receiving described downlink data:

1 PRB, 2 PRB, 3 PRB, 4 PRB, 6 PRB.

27. methods according to claim 24, is characterized in that, the initial OFDM symbol of described ePDCCH adopts predefined original position in the time there is no high-level signaling configuration.

28. methods according to claim 24, is characterized in that, described original position is one of following:

The 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol.

29. methods according to claim 22, is characterized in that, receive described downlink data according to the transmission means corresponding with described trigger message, comprising:

Below one of at least in situation, in predefined channel set, at least two channels adopt identical transmission means: the quantity of described subframe is greater than 1; The type of described terminal is specified type; Receive described transmission indication signaling.

30. methods according to claim 29, is characterized in that, described channel set comprises following at least two channels:

Physical Downlink Shared Channel PDSCH, the PDSCH that carries publicly-owned data message, primary synchronization channel, auxiliary synchronization channel, the broadcast channel of carrying user proprietary data information.

31. methods according to claim 22, is characterized in that, receive described downlink data according to the transmission means corresponding with described trigger message, comprise one of following:

Adopt time-multiplexed mode to receive the subframe of described publicly-owned data message and the subframe of described user's proprietary data information; And/or

Adopt time-multiplexed mode to receive the subframe of the proprietary Downlink Control Information of user and the PDSCH subframe of described user's proprietary data information.

32. methods according to claim 22, is characterized in that, when described downlink data transmits in multiple subframes, in predetermined period, the described downlink data taking time domain unit as unit sends, wherein, each described time domain unit comprises M subframe, and M is positive integer.

33. according to method described in claim 32, it is characterized in that, described predetermined period comprises N radio frames, and N is positive integer; In described predetermined period, exist one or morely for sending the time domain cell position of described downlink data, terminal detects described downlink data and each described time domain cell position corresponding to time domain unit described at least one on described time domain cell position.

34. methods according to claim 31, is characterized in that, for receiving the integral multiple that the quantity of subframe of described user's proprietary data information is 4.

35. methods according to claim 34, is characterized in that, select the subframe for receiving described user's proprietary data information from following subframe:

The 1st subframe, the 2nd subframe, the 3rd subframe, the 4th subframe, the 6th subframe, the 7th subframe, the 8th subframe, the 9th subframe.

36. methods according to claim 22, it is characterized in that, adopt before transmission means based on CRS receives described downlink data, comprising: below one of at least in situation, adopt differential quadrature phase keying (DQPSK) DQPSK mode to carry out demodulation to described downlink data to described downlink data:

The quantity of described subframe is greater than 1; The type of described terminal is specified type; It is DQPSK that described transmission indication signaling is indicated the modulation system of described downlink data.

37. methods according to claim 36, is characterized in that, are adopting described DQPSK to separate timing to described downlink data, and the initial reference symbol of use comprises: predefine value or appointment pilot tone.

38. according to the method described in claim 37, it is characterized in that, described appointment pilot tone adopts following structure:

The Resource Unit RE that each pilot tone port comprises takies RE that the one or more OFDM symbols in data transfer bandwidth, each pilot tone port comprise and one of takies in the part RE in data transfer bandwidth at least.

39. according to the method described in any one in claim 24,29 and 36, it is characterized in that, described specified type comprise following one of at least:

The terminal of low cost terminals, assigned address, the terminal of support coverage enhancement technology.

The transmitting device of 40. 1 kinds of downlink datas, is applied to base station, it is characterized in that, comprising:

Acquisition module, for obtaining the trigger message that adopts given transmission mode for triggering;

Transport module, for adopting the transmission means corresponding with described trigger message to transmit described downlink data according to described trigger message.

41. according to the device described in claim 40, it is characterized in that, and described acquisition module, for obtaining the described trigger message that comprises following one of at least information:

For transmit described downlink data subframe quantity, for receive described downlink data terminal type, receive and come from the transmission indication signaling on upper strata.

The transmission processing device of 42. 1 kinds of downlink datas, is applied to terminal, it is characterized in that, comprising:

Acquisition module, for obtaining the trigger message that adopts given transmission mode for triggering;

Receiver module, for receiving described downlink data according to the transmission means corresponding with described trigger message.

43. according to the device described in claim 42, it is characterized in that, and described acquisition module, for obtaining the described trigger message that comprises following one of at least information:

The type of Physical Random Access Channel PRACH type, described terminal, the transmission indication signaling receiving.