CN103220796B - A kind of downlink data transmission method and equipment thereof - Google Patents

A kind of downlink data transmission method and equipment thereof Download PDF

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Publication number
CN103220796B
CN103220796B CN201210020090.1A CN201210020090A CN103220796B CN 103220796 B CN103220796 B CN 103220796B CN 201210020090 A CN201210020090 A CN 201210020090A CN 103220796 B CN103220796 B CN 103220796B
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described
data transmission
downlink data
frequency band
terminal
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CN201210020090.1A
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CN103220796A (en
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徐伟杰
贾民丽
邢艳萍
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电信科学技术研究院
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation

Abstract

The invention discloses a kind of downlink data transmission method and equipment thereof.The method is applied to LTE system, the data field of the downlink system working band of described LTE system is configured with at least one downlink data transmission frequency band, and the bandwidth of each downlink data transmission frequency band controls bandwidth shared by channel region less than LTE system, the method includes: the network equipment is by the down control channel in LTE system control area, send control signaling to terminal, in described downlink data transmission frequency band, carry out downlink data transmission with dispatch terminal;Terminal on this downlink data transmission frequency band, in described downlink data transmission frequency band, is carried out data transmission by the described network equipment.Use the present invention can reduce the data transfer bandwidth of terminal, and realize while reducing terminal cost, take into account the compatibility controlling channel.

Description

A kind of downlink data transmission method and equipment thereof

Technical field

The present invention relates to wireless communication field, particularly relate to a kind of downlink data transmission method and equipment thereof.

Background technology

Technology of Internet of things is in the ascendant, at 3-G (Generation Three mobile communication system) and its long evolving system (Long Term Evolution, LTE) in need support MTC (Machine Type Communications, machine-type communication) function.MTC makees For a kind of novel communication theory, its objective is to organically combine, such as the communication technology of number of different types: Machine To Machine is led to Letter, apparatus control communication, man-machine interaction communication, mobile interchange communication, thus promote the development of social production and life style.

Current mobile communications network is for interpersonal communication scheme, such as: the determination etc. of network capacity.

The MTC communication characteristics more that may be present being currently recognized that have:

-MTC terminal (or claiming M2M terminal) has Hypomobility;

The time that-MTC terminal and network side carry out data transmission is controlled;I.e. MTC terminal can only be specified at network Access in time period;

The data transmission that-MTC network and network side are carried out is the highest to requirement of real-time to data transmission, it may be assumed that have the time Tolerance;

-MTC terminal energy constraint, it is desirable to extremely low power consumption;

The information transmission of small data quantity is only carried out between-MTC terminal and network side;

-MTC terminal can be managed in units of group.

One actual MTC terminal can have above-mentioned one or more characteristics.

It is following several that existing LTE system bandwidth has shown in table 1:

Table 1

Channel width (MHz) 1.4 3 5 10 15 20 Transmission bandwidth configuration (RB number) 6 15 25 50 75 100

LTE downlink resource distribution type has three kinds: Resource allocation type 0/1/2 at present.

Available resources in system bandwidth are divided into RBG by Resource allocation type 0 (resource allocation type 0) (Resource Block Group, Resource Block group), each RBG is by P continuous print VRBs (Virtual Resource Block, virtual resource blocks) of localized type composition, the size of P is determined by system bandwidth: the group number of RBGN is used on PDCCHRBGIndividual bit utilizes the mode of bitmap to indicate each RBG the most occupied, As shown in table 1.

Table 1

Resource allocation type 1 (resource allocation type 1), with resource allocation type0 Adopt and in a like fashion resource is divided into RBG.Further, by NRBGIndividual RBG is divided into P subset, and RBG subset p is corresponding with p for rising Beginning P is the RBG (0≤p < P) at interval, as shown in Figure 1.ENB passes through PDCCH ((Physical Downlink Control Channel, Physical Downlink Control Channel)) VRBs's takies situation in instruction RBG subset and subset.Wherein, the taking of VRB The mode using bitmap addresses, it is possible to addressing is in the range of fractional bandwidth, from ΔshiftP () starts.ΔshiftThe value of (p) There are two kinds of possibilities, RB resource indication information on 1 bit instruction PDCCH on PDCCH the bit number taken and resource Allocation type0 is the same, is also NRBG.Including:

RBG subset indicates, and passes throughBit indicates;

1 bit indicates whether skew: value is 0 corresponding Δshift(p)=0;Value is 1 correspondence

Δ shift ( p ) = N RB RBGsubset ( p ) - N RB TYPE 1 ;

VRB of localized type in bit address RBG subset,

In i-thIndividual bit indicates this RBG group interior from Δshift(p) start i-th Individual VRB, corresponding VRB is numbered:

In Resource allocation type 2 (resource allocation type 2), PDCCH instruction distribution is continuous print Localized VRB (centralized VRB) or distributed VRB (virtual reality B).Have in DCI format 1A/1B/1D The Localized/Distributed VRB assignment flag of 1bit;When using PDCCH DCI format 1C, fixing Distribution distributed VRB.For PDCCH DCI format 1A, 1B or 1D, PDCCH is passed through in one section of continuous print VRB resource distribution On resource indication value (RIV) indicate, RIV and initial RB (RBstart) and continuous dispensing VRB length Degree LCRBsRelation as follows:

Wherein, LCRBs≥land shall not exceed(i.e. LCRBs>=1 and be less than)。

For PDCCH DCI format 1C, VRB resource distribution indicating mode on PDCCH is similar to above, wherein, L CRBs = N RB step ,

Wherein, L CRBs ′ = L CRBs / N RB step , RB start ′ = RB start / N RB step ,

In existing LTE system, the money map source of uplink/downlink control channel is all based on system bandwidth design, so terminal Bandwidth of operation just can the most normally need to work at least above equal to system bandwidth of operation.In order to make the LTE terminal can Network under various band width configuration roam and switches, currently requiring that the bandwidth of LTEUE (User Equipment, terminal) extremely It is 20MHz less.

MTC device in communicating in view of later little bandwidth system can be the hugest, and overwhelming majority occasion MTC device Function is the most single, it is not necessary to the highest transfer rate, it is therefore desirable to consider further to be dropped the cost of MTC device Low.

Bandwidth is the key factor affecting MTC device cost, current LTE system requirement, and all of terminal must be supported The system bandwidth of 20MHz, if but can suitably reduce the bandwidth of operation of MTC terminal device based on LTE system, can significantly drop Low cost.But the problem that reduction UE terminal bandwidth is brought is, due to the full Bandwidth map of down control channel, therefore UE cannot have Effect reads down control channel, up also cannot carry out PUCCH (Physical Uplink Control on up full bandwidth CHannel, physical uplink control channel) feedback, so bring control channel compatibility issue and with tradition The coexistence problems of terminal.

Summary of the invention

Embodiments provide a kind of downlink data transmission method and equipment thereof, in order to reduce terminal bandwidth and real The compatibility controlling channel is taken into account while reducing terminal cost now.

The downlink data transmission method that the embodiment of the present invention provides, is applied to LTE system, the descending system of described LTE system The data field of system working band is configured with at least one downlink data transmission frequency band, and the bandwidth of each downlink data transmission frequency band Controlling bandwidth shared by channel region less than LTE system, the method includes:

The network equipment, by the down control channel in LTE system control area, sends control signaling to terminal, with scheduling Terminal carries out downlink data transmission in described downlink data transmission frequency band;

Terminal on this downlink data transmission frequency band, in described downlink data transmission frequency band, is carried out by the described network equipment Data are transmitted.

The downlink data transmission method that another embodiment of the present invention provides, is applied to LTE system, under described LTE system The data field of row system operating band is configured with at least one downlink data transmission frequency band, and each downlink data transmission frequency band Bandwidth controls bandwidth shared by channel region less than LTE system, and the method includes:

Terminal receives the control signaling that the network equipment is sent by the down control channel in LTE system control area;

Described terminal is according to described control signaling, on the downlink data transmission frequency band of described terminal, receives the network equipment The downlink data sent.

The network equipment that the embodiment of the present invention provides, is applied to LTE system, the downlink system work frequency of described LTE system The data field of band is configured with at least one downlink data transmission frequency band, and the bandwidth of each downlink data transmission frequency band is less than LTE Bandwidth shared by system control channels region, this network equipment includes:

Transmission control module, for by the down control channel in LTE system control area, sends to terminal and controls letter Order, carries out downlink data transmission with dispatch terminal in described downlink data transmission frequency band;

Data transmission module, in described downlink data transmission frequency band, to the end on this downlink data transmission frequency band End carries out data transmission.

The terminal unit that the embodiment of the present invention provides, is applied to LTE system, the downlink system work frequency of described LTE system The data field of band is configured with at least one downlink data transmission frequency band, and the bandwidth of each downlink data transmission frequency band is less than LTE Bandwidth shared by system control channels region, this terminal unit includes:

Control data obtaining module, pass through the down control channel in LTE system control area for receiving the network equipment The control signaling sent;

Data transmission module, for according to described control signaling, on the downlink data transmission frequency band of described terminal, receives The downlink data that the network equipment sends.

The above embodiment of the present invention, by carrying out down control channel transmission in the range of system full bandwidth, is being less than Carry out downlink data transmission in system bandwidth, thus the down control channel of the most compatible conventional terminal designs, and is not required to Redesign descending control area, while reducing terminal bandwidth, reduce the impact on existing specification.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of Resource allocation type 0&1 in prior art;

One of schematic flow sheet of downlink data transmission that Fig. 2 provides for the embodiment of the present invention;

The two of the schematic flow sheet of the downlink data transmission that Fig. 3 provides for the embodiment of the present invention;

The structural representation of the network equipment that Fig. 4 provides for the embodiment of the present invention;

The structural representation of the terminal unit that Fig. 5 provides for the embodiment of the present invention.

Detailed description of the invention

Principle and technique effect is realized, first below to existing mark for the clearer explanation embodiment of the present invention The relevant regulations of PRACH (Physical Random Access Channel, Physical Random Access Channel) resource location is carried out Explanation.

In LTE system, a PRACH channel accounts for 6 PRB resources.When using Format 0~3, subcarrier spacing is 1.25KHz, 1 PRACH channel comprises 864 subcarriers (1.08MHz), preamble (leading) the sequence quilt of a length of 839 Map on 839 subcarriers of centre.Format4 is used (to be only used for TDD (Time Division Duplexing, time-division Duplex) system) time, subcarrier spacing is 7.5KHz, and 1 PRACH channel comprises 144 subcarriers (1.08MHz), a length of The preamble sequence of 139 is mapped on 139 subcarriers of centre.Running time-frequency resource shared by PRACH is by eNB (enode B, i.e. base station) determine, and notify UE by system message.

LTE-FDD system, owing to using TYPE1 frame structure, in 10ms radio frames, sub-frame of uplink number determines and abundant, The transmission of PRACH is not limited by frame structure, can initiate in any subframe.Each sub-frame of uplink at most allows send PRACH, i.e. PRACH are only distinguished by time domain, and are not distinguished by frequency domain, first physical resource that can be used for PRACH The call number of blockIt is defined asWherein parameterFor by higher level parameters prach- FrequencyOffset configures, and span is: 0 ≤ n PRBoffset RA ≤ N RB UL - 6 .

TD-LTE system, due to the restriction of time division duplex feature, different uplink-downlink configuration causes in a radio frames Sub-frame of uplink number is uncertain and number is few.In order to ensure in the case of sub-frame of uplink is on the low side, UE sends the real-time of PRACH Property, it is allowed to the transmission of subframe transmission multiple PRACH, i.e. PRACH needs to carry out time-frequency resource maps.Time-frequency resource maps is advised Then: be first allocated in time domain, if time-domain resource is deficient, considers further that on frequency domain, place multiple PRACH.PRACH joins Put by one group of parameterIndicate.Wherein, fRAIt is frequency resource sequence number, is used for calculating PRACH's Frequency domain resource takies.

For preamble format 0-3:

For preamble format 4:

n PRB RA = 6 f RA , if ( ( n f mod 2 ) × ( 2 - N SP ) + t RA ( 1 ) ) mod 2 = 0 N RB UL - 6 ( f RA + 1 ) , otherwise

Wherein, nfFor System Frame Number, NSPIt it is the number of ascending-descending subframes switching point in a radio frames.

The PRACH resource of format0-3 be bilateral mapping be sequentially allocated resource, be monolateral mapping for Format 4.

Knowable to above-mentioned analysis, in LTE system, PRACH channel may be distributed in 6 of arbitrary continuation in system bandwidth In PRB resource.

Learning through investigation, the bandwidth of operation of UE is greater than the lowest equal to 20MHz, the radio-frequency devices cost base to UE This nothing affects, but A/D (analog), the cost of D/A (D/A) device such as transducer and baseband processor, with the relation of bandwidth The most closely, reduce bandwidth and can effectively reduce the cost of above-mentioned device.

Analyzing based on above, the scheme of the most potential reduction bandwidth has a following two:

Scheme 1: radio frequency reduces the mode of bandwidth

Under the program, terminal uses the radio-frequency devices of narrower bandwidth, such as uses maximum to support the filter of 5MHz amount of bandwidth Ripple device, power amplifier, transceiver, duplexer (or switch) (following as a example by bandwidth 5MHz).By using bandwidth relatively Narrow wave filter, only leaching and the useful signal in little bandwidth terminal bandwidth of sampling, reduce the demand to caching, and reduce After bandwidth, on the premise of the speed fully meeting M2M communication and delay requirement, also reduce the sampling of ad/da converter Rate requirement;And the FFT of baseband processing portion (fast Fourier) conversion, channel are estimated, channel equalization and signal detection with And the process of HARQ (Hybrid Automatic Repeat Request, hybrid automatic repeat-request) is also with the fall of bandwidth Low effectively reduced, reduced baseband processing device conversion speed and the demand of HARQ caching device of UE further, Thus effectively reduce cost.

Scheme 2: radio frequency bandwidth does not reduces, the mode that the bandwidth of baseband processing portion reduces

Due to bandwidth for the cost of UE radio frequency part without impact, so this programme proposes not reduce the band of UE radio-frequency devices Width, only reduce UE baseband processing portion bandwidth, i.e. reduce ad/da converter, FFT, channel estimate, channel equalization and The bandwidth of the part such as the process of signal detection and HARQ, the program can obtain the reduction cost of the approximation with scheme 1 substantially Effect.Also proposed the scheme of a kind of enhancing on this basis, i.e. wish to obtain the frequency selectivity gain of descending scheduling, if So, then the Subframe cache size of terminal, AD sampling bandwidth, FFT Size then cannot reduce bandwidth of operation, thus more square Case 1, has certain cost to increase.

Although such scheme 1 can more effectively reduce the cost of terminal, but there are some significant shortcomings:

(1) down control channel and ascending control channel are incompatible with existing LTE system;

(2) if individually designed ascending control channel, a kind of possible scheme is up according to existing LTE at little bandwidth frequency band The design of PUCCH carries out uplink feedback channel design.But conventional terminal can be brought serious resource broken by this kind of mode Sheet problem, in the presence of the medium and small bandwidth terminals of system, tradition LTE UE (conventional terminal need to have single carrier emission characteristics) is by nothing The resource of method configuration full bandwidth carries out business transmission, thus cannot obtain higher peak rate;

(3) due to existing LTE standard, the position of PRACH resource is specified, may alternatively appear in any position of system uplink frequency range Put, then, after reducing bandwidth, the up PRACH of terminal sends and can not design based on existing standard, there is compatibility issue.

Although such scheme 2 can more effectively reduce the cost of terminal, but there is also more significantly shortcoming, be divided into The following two kinds situation:

Situation A: do not consider frequency selectivity gain, then can obtain and the effect reducing cost of scheme 1 approximation substantially, but The shortcoming of the program is similar with scheme 1 in such cases:

(1) down control channel and ascending control channel are incompatible with existing LTE system;

(2) if this kind of individually designed ascending control channel of scheme, a kind of possible scheme be little bandwidth frequency band according to The design of the up PUCCH of existing LTE carries out uplink feedback channel design.But conventional terminal can be brought sternly by this kind of mode The resource fragmentation problem of weight, in the presence of the medium and small bandwidth terminals of system, (conventional terminal need to have single carrier and launch tradition LTE UE Characteristic) resource that will be unable to configure full bandwidth carries out business transmission, thus cannot obtain higher peak rate;

(3) due to existing LTE standard, the position of PRACH resource is specified, may alternatively appear in any position of system uplink frequency range Put, then, after reducing bandwidth, the up PRACH of terminal sends and can not design based on existing standard, there is compatibility issue.

Situation B: in the case of considering frequency selectivity gain, it is impossible to reduce the sampling speed of AD/DA sampler further Rate, Subframe (subframe) cache size, FFT Size etc., shortcoming in like fashion include:

(1) cost comparing scheme 1 is significantly increased, and the cost of particularly Subframe cannot effectively reduce;

(2) down control channel compatibility issue still exists;

(3) Subframe caching cannot effectively reduce.

In order to solve the problems referred to above, the embodiment of the present invention proposes a kind of downlink data transmission scheme, to reduce terminal band Wide.In the program, RF (radio frequency) part does not reduce bandwidth, and downlink system control area reception bandwidth does not reduces, only to data base Tape handling part reduces bandwidth.

Below in conjunction with the accompanying drawings the embodiment of the present invention is described in detail.

As a example by LTE system, from the point of view of network side angle, the downlink data transmission flow process that the embodiment of the present invention provides can be such as Shown in Fig. 2.The network equipment in this flow process is usually eNB, and terminal refers to that little bandwidth terminals, i.e. bandwidth are less than LTE system bandwidth Terminal, such as MTC terminal.The data field of the downlink system working band of this LTE system is configured with at least one downlink data Transmission band, and the bandwidth of each downlink data transmission frequency band controls bandwidth shared by channel region less than LTE system.Wherein, system Control area refers to symbol shared by PDCCH channel in LTE subframe, and system data territory refers to remove shared by PDCCH channel in LTE subframe Other symbols of outer symbol.This flow process comprises the steps that

Step 200, the downlink data transmission band information of this terminal, by sending signaling to terminal, (is included frequency by eNB Position and bandwidth) it is indicated to terminal.Certainly, downlink data transmission frequency band of also can having made an appointment between terminal and network side is believed Breath, so, the network equipment just can be by signaling its downlink data transmission band information of terminal.

Step 201, eNB, by the down control channel in LTE system control area, sends control signaling to terminal, with Scheduling UE carries out downlink data transmission in downlink data transmission frequency band;

Step 202, eNB, in downlink data transmission frequency band, carries out data to the terminal on this downlink data transmission frequency band Transmission.

Wherein, when terminal is scheduling by the network equipment, frequency indicated by resource indication bit in down control channel Scope of resource is in whole LTE system bandwidth of operation or to be limited in above-mentioned downlink data transmission frequency range.

Owing to RF part is not reduced bandwidth by the embodiment of the present invention, the transmitter of existing down control channel therefore can be continued to use System, i.e. eNB sends the down control channel of terminal in bandwidth range shared by LTE system control area.LTE system control zone Bandwidth range shared by territory can be LTE system bandwidth of operation.

Owing to the embodiment of the present invention reduces for the bandwidth of the downlink data transmission signal of terminal, it is therefore desirable to make terminal know Downlink data transmission band information dawn (i.e. frequency information shared by downlink data transmission, including frequency position, amount of bandwidth etc.), with Just receive, in frequency band, the downlink data that network side sends.The frequency position of downlink data transmission frequency band and bandwidth information, can Arrange consistent in advance with end side at network side, it is also possible to passed by signaling user equipment downlink data by network side (such as eNB) Frequency resource scope (the i.e. frequency range of downlink data dispatching, such as PRB scope, the business of each terminal of defeated place bandwidth Scheduling falls in this band limits).

Owing to LTE system can use the mode of identical networking, so the problem that there is adjacent cell co-channel interference.Time different Between in section, the co-channel interference situation that in LTE system working band, each frequency subband is subject to may be different, so also existing adjacent little The demand of district's interference coordination, thus the frequency location of M2M data transmission changes in the position of LTE system band alleviating distention in middle-JIAO Demand, therefore downlink data transmission band information it may happen that change.

In the case of by network side by signaling the frequency resource scope of user equipment downlink data transmission place bandwidth, When downlink data transmission band changes, the handling process of network side is further comprising the steps of:

Step 203, downlink data transmission frequency band change information is notified to terminal by eNB by signaling.

It should be noted that in actual applications, the downlink data transmission flow process performed by eNB does not has strict sequential order and wants Ask.Such as, eNB, can be repeatedly descending in terminal access system and in a period of time after terminal sends down control channel In data transmission frequency band, terminal is carried out data transmission;For another example, the change of downlink data transmission frequency band it may happen that repeatedly, for Change every time, downlink data transmission frequency band change information will be notified to terminal by eNB by signaling.

In flow process shown in Fig. 2, eNB can indicate the frequency of the downlink data transmission place bandwidth of terminal to provide in the following manner Source range:

Mode 1: the PDCCH indicating mode of common configuration

Which refers to that eNB passes through the PDCCH notice user equipment downlink data biography of the public search space of down control channel Defeated shared frequency information, frequency information shared by downlink data transmission can include frequency position, amount of bandwidth etc..

Further, in order to distinguish little bandwidth terminals and tradition LTE terminal, can be terminal distribution public RNTI (Radio Network Temporary Identifier, Radio Network Temporary Identifier), it is designated as M-RNTI.Specifically can be according to demand for institute Having terminal to configure a M-RNTI, the most all of terminal is configured on a frequency and works;It can also be different frequency position Or/and the differently configured RNTI of the terminal of amount of bandwidth (the usual same type of terminal identical frequency of use and bandwidth, network side According to certain rule, little bandwidth terminals can be classified, such as classify according to amount of bandwidth or ability rating), such as M- RNTI-1, M-RNTI-2 ... M-RNTI-n, downlink data transmission frequency resource corresponding for the most each RNTI is identical, this Different types of terminal can be configured at frequency position (amount of bandwidth can also be different) the enterprising industry business transmission of correspondence by sample.

In order to save the resource shared by above-mentioned PDCCH signaling, PDCCH signaling can provide in the way of using period assignment Source configures.When implementing, the information such as cycle and place radio frames, the subframe that can arrange PDCCH signaling in a standard;Also may be used To be informed the configuration information of this PDCCH signaling of terminal by broadcast signaling by network side.

Mode 2:BCH (Broadcasting Channel, broadcast channel) advice method

Network can configure one or more little bandwidth transmission bands at the data field of LTE system bandwidth, it is possible to PBCH (Physical Broadcasting Channel, Physical Broadcast Channel) channel notifying, user equipment downlink data transmit institute Account for frequency information, including frequency position, amount of bandwidth.Little bandwidth terminals is used certain rule (such as according to bandwidth by network Size or ability rating are classified) classify, and in PBCH, notify all types of terminal successively according to the classification of terminal Downlink data transmission band information.Concrete, the network equipment indicates all types of ends according to the order of agreement in the mapping of PBCH channel The bit of the downlink data transmission band information (band position, amount of bandwidth) of end.For saving number of bits further, network thing The information such as first band position, amount of bandwidth and each data frequency numbering first arranging the transmission of each data with terminal, network In PBCH, the bit of the numbering of the downlink data transmission frequency band indicating each Terminal Type to use is mapped only in accordance with the order arranged.

A kind of specific implementation is: in the reserved bit of existing PBCH channel, add that above-mentioned instruction information is (the most descending The shared frequency information of data transmission);Another way is: be separately provided new PBCH channel to carry above-mentioned instruction letter for terminal Breath (i.e. frequency information shared by downlink data transmission).According to the mode of newly-increased PBCH channel, then the transmission mechanism of PBCH, such as Resource mapping, cycle etc., current mechanism can be continued to use.The operation that terminal obtains after above-mentioned mib information is consistent with mode one, the most not Repeat again.

In flow process shown in Fig. 2, the frequency band change information of downlink data transmission can be notified to end by eNB in the following manner End:

Mode 1:eNB uses system message update mechanism notice

Under which, when the downlink data transmission band information of above-mentioned PDCCH channel or PBCH channel bearing is (as frequency refers to Show information) when changing, network uses the mechanism notice terminal of system message update, and terminal is sent system message alteration Paging indicates, and informs that terminal reads the above-mentioned PDCCH channel after updating or PBCH channel.For reducing the shadow to existing H2H terminal Ringing, this beep-page message individually can send for M2M terminal, such as uses the P-RNTI of terminal-specific to scramble.

Mode 2:eNB uses PDCCH order notice

To carrying out the terminal of business transmission, eNB can use and send terminal-specific PDCCH in the exclusive space of terminal The mode of order is with the information of the frequency band change of notice user equipment downlink data transmission more timely;ENB uses PDCCH order (order) notice terminal frequency band change mode, specifically include: eNB in PDCCH order order, carry renewal after frequency band Information (such as frequency position, amount of bandwidth), or eNB by PDCCH order order instruction terminal go read bearing downlink number According to the channel (PDCCH channel as the aforementioned or BCH channel) of the band information of transmission, to obtain the downlink data transmission after updating Band information.

Mode 3:eNB uses PDCCH notice

To carrying out the terminal of business transmission, eNB can use the side sending terminal-specific PDCCH in the exclusive space of terminal Formula is with the frequency band change information of notice user equipment downlink data transmission more in time.Specifically, terminal can be scheduling PDCCH signaling increases the instruction of some bits, for the frequency band change information of indicating downlink data transmission, the method for bit instruction Include but not limited to use bitmap indicating mode or the valuetag indicating mode of frequency.Bitemap is bit sequence, uses Bitemap indicating mode refers to: working frequency points to should a bit in sequence, if eNB is by this bit set, then Instruction user equipment downlink business transmission will be transmitted in the frequency range corresponding at this bit.Valuetag is count value, uses valuetag The mode of instruction refers to: a frequency is often changed in the scheduling of terminal by eNB, then the value that valuetag represents adds 1, and terminal can basis Whether the valuetag of twice scheduling front and back changes acquisition frequency range whether change information, if terminal is sentenced according to the instruction of valuetag Break data transmission frequency range change, then terminal needs the channel (PDCCH as the aforementioned that retaking of a year or grade bearing downlink data are transmitted Channel or BCH channel) obtain the band information of downlink data transmission after change with further.

Mode 4:eNB uses PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) That carries signals terminal

The signaling carrying frequency change information is transmitted in PDSCH channel, and concrete information can include, target frequency, with And entry-into-force time information, i.e. network switching concrete some switching time (radio frames, subframe) that carries out data transmission of frequency, then when Arriving some switching time, the data of target frequency bands are only carried out samples storage and treat subsequent treatment by terminal.

As a example by LTE system, corresponding to the handling process of above-mentioned network side, from the point of view of terminal point, the embodiment of the present invention The downlink data transmission flow process provided can be as shown in Figure 3.This flow process comprises the steps that

Step 300, terminal obtains downlink data transmission band information according to the signaling that the network equipment sends and (includes frequency position Put and bandwidth).Certainly, downlink data transmission band information of also can having made an appointment between terminal and network side, so, network sets Standby just can be by signaling its downlink data transmission band information of terminal.

Step 301, terminal receives the control that the network equipment is sent by the down control channel in LTE system control area Signaling.

Step 302, terminal is according to this control signaling, on the downlink data transmission frequency band of this terminal, receives the network equipment The downlink data sent.

In the specific implementation, terminal reads PCFICH (Physical Control Format Indicator Channel, Physical Control Format Indicator Channel) to obtain symbol numbers shared by descending control area, only by the symbol of control area Number carry out full bandwidth sampling, for ensureing to control the performance of channel, after the symbol sampler of data area, can be by leading in sampled data Frequency is according to optionally receiving, and pilot tone based on control area also combines the pilot frequency sequence of data area and is controlled region Channel estimate, go out channel in the symbol of control area based on above-mentioned channel estimation results interpolation calculation and estimate final result, base Process in this full bandwidth (i.e. LTE system bandwidth of operation) detection carrying out down control channel.

Terminal, when receiving downlink data, first carries out total system bandwidth range data sampling and carries out FFT process, then According to the band information of downlink data transmission, read the sampled data in the range of respective bandwidth and put into buffer so that after carrying out Continuing Base-Band Processing, the data in other its bandwidth non-are the most directly abandoned, and then effectively reduce the Subframe buffer of terminal Demand.Wherein, downlink data transmission band information (including frequency position and bandwidth) can be consistent with network side agreement in advance, The signaling that can also send by receiving network side obtains, and e.g., detects according to the down control channel in the range of full bandwidth The signaling of the bearing downlink data transmission frequency band information detected by journey, obtains downlink data transmission band information.

Owing to LTE system can use the mode of identical networking, so the problem that there is adjacent cell co-channel interference.Time different Between in section, the co-channel interference situation that in LTE system working band, each frequency subband is subject to may be different, so also existing adjacent little The demand of district's interference coordination, thus the frequency location of M2M data transmission changes in the position of LTE system band alleviating distention in middle-JIAO Demand, the band information of downlink data transmission, it may happen that change, the most further, can comprise the further steps of:

Step 303, terminal obtains downlink data transmission frequency band change information, and according to the downlink data transmission frequency got Band change information, downlink data transmission frequency band in the updated carries out downlink data transmission.

It should be noted that in actual applications, the downlink data transmission flow process performed by terminal does not has strict sequential order Requirement.Such as, terminal, in access system and in a period of time after reading down control channel, can repeatedly pass at downlink data The data transmission of network side is received in defeated frequency band;For another example, downlink data transmission frequency band changes it may happen that repeatedly, for every time Change, terminal will carry out the adjustment of downlink data transmission frequency band.

Corresponding in flow process described in Fig. 2, eNB instruction user equipment downlink data transmit the side of the frequency resource scope of place bandwidth Formula, in flow process shown in Fig. 3, terminal can be by the band information of following corresponding manner acquisition downlink data transmission:

Mode 1: the PDCCH indicating mode of common configuration

Terminal searches for PDCCH at the public search space of down control channel, obtains the downlink data transmission wherein carried Band information.In the case of PDCCH uses the scrambling of terminal RNTI, terminal uses the M-RNTI for its distribution (as use should The M-RNTI that type belonging to terminal is corresponding) PDCCH is descrambled, if PDCCH can correctly be resolved, then obtain and wherein carry Downlink data transmission band information, otherwise abandons this PDCCH signaling.Terminal can carry out PDCCH's according to the configuration information of PDCCH Search, the configuration information of PDCCH can be arranged at network side and end side in advance, or terminal is believed according to the broadcast of network side Order obtains the configuration information of PDCCH.

Owing to SIB is sampling schedules transmission, any frequency location in LTE system bandwidth may be dispatched, so eventually Hold the PDCCH first reading the scrambling of M-RNTI information before receiving SIB message, thus obtain its data transmission (including that SIB transmits) Shared frequency location information, when downlink data receives, the signals collecting of the frequency location that can SIB information be likely to occur arrives In buffer, wait that next step detection etc. processes.

Mode 2:BCH advice method

If the network equipment maps the downlink data transmission of all types of terminals of instruction frequently according to the order of agreement at PBCH channel Information (includes frequency position and bandwidth), and the most accordingly, terminal, according to this about definite sequence, receives the network equipment at PBCH channel Downlink data transmission band information corresponding to type belonging to this terminal of middle transmission.If the network equipment exists according to the order of agreement Mapping the numbering of data transmission frequency band indicating each Terminal Type to use in PBCH, the most accordingly, terminal, according to this about definite sequence, connects Receive frequency position and the numbering of bandwidth, root for representing downlink data transmission frequency band that the network equipment sends in PBCH channel The downlink data transmission band information of correspondence is determined according to this numbering.

Corresponding in flow process described in Fig. 2, eNB indicates the mode of the frequency band change information of user equipment downlink data transmission, Fig. 3 institute Showing in flow process, terminal can be by the downlink data transmission band information after the acquisition renewal of following corresponding manner:

Mode 1: terminal receives the paging instruction of the system message alteration that eNB sends, obtains according to this instruction after updating PDCCH or PBCH, and obtain the downlink data transmission band information after updating according to PDCCH or PBCH after updating.In paging In the case of instruction uses the RNTI scrambling of terminal, terminal indicates first by the P-RNTI descrambling paging distributed for it, if This paging instruction can be resolved and then carry out above-mentioned process, otherwise abandon this paging instruction.

Mode 2: terminal is after the exclusive space of terminal receives the order order of terminal-specific PDCCH, according to this PDCCH Order order obtains the downlink data transmission band information after updating.A kind of specific implementation is: PDCCH order order In carry the downlink data transmission band information after renewal, terminal is directly according to PDCCH order order i.e. in such cases The downlink data transmission band information after renewal can be obtained;Another kind of specific implementation is: PDCCH order order instruction is eventually End goes to read the channel (PDCCH channel as the aforementioned or BCH channel) of bearing downlink data transmission frequency band information, this kind of situation Under, terminal reads respective channel according to this instruction, obtains downlink data transmission band information from the channel signaling read.

Mode 3: terminal after the exclusive space of terminal receives PDCCH, according to this PDCCH signaling obtain update after descending Data transmission frequency band information.A kind of specific implementation is: carrying the bitmap of frequency in PDCCH signaling, terminal will wherein Bit value is that the frequency corresponding to bit of " 1 " (can certainly be " 0 ", arrange according to system) is as under the carrying out after updating The frequency of row data transmission;Another kind of specific implementation is: carry the valuetag of frequency, terminal root in PDCCH signaling Whether change according to the valuetag of twice scheduling of front and back and judge whether downlink data transmission band information changes, if front and back two The valuetag of secondary scheduling is different, then explanation downlink data transmission band information changes, and in such cases, terminal retaking of a year or grade is held After the channel (PDCCH channel as the aforementioned or BCH channel) of load downlink data transmission band information is with further acquisition change Downlink data transmission band information.

Mode 4: terminal receives the PDSCH signaling that eNB sends, obtains the downlink data transmission frequency after the renewal wherein carried Information.

Additionally, eNB can not also notify the change information of user equipment downlink data transmission frequency band, terminal can be descending with self-discovery The change of data transmission frequency band, and obtain the downlink data transmission band information after renewal, specifically can be in the following ways:

Mode 5: the channel (such as PDCCH channel or PBCH channel) of bearing downlink data transmission frequency band information is carried out by terminal Monitor

Under which, network side does not use other to signal the information of terminal data business transmission frequency change, terminal Monitor according to the cycle of above-mentioned PDCCH signaling or PBCH signaling always, thus can obtain downlink data transmission frequency at any time Band change information.

Mode 6: which is the prioritization scheme of aforesaid way 5

After above-mentioned PDCCH channel or PBCH channel are detected by terminal, obtain downlink data transmission frequency band the most for the first time Information, no longer detects above-mentioned channel.During eNB dispatch terminal, terminal indicates according to PDCCH, if finding detection mistake (CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC)) verifies unsuccessfully), either deteriorates also due to channel moment Being the eNB frequency band that changes scheduling, terminal is according to the above-mentioned channel of configuration retaking of a year or grade of above-mentioned PDCCH channel or PBCH channel, to obtain Take the downlink data transmission band information after the information and change whether downlink data transmission band change.Which and mode 5 compare, it is possible to reduce the burden of terminal and power consumption.

Mode 7: terminal judges according to PDCCH

To carrying out the terminal of business transmission, eNB can use and send terminal-specific PDCCH in the exclusive search volume of terminal Mode with more in time notice terminal frequency point change information.Specifically, the PRB of terminal scheduling is indicated information permissible by network Indicate in the range of the PRN (Pseudo Random Noise code, Pseudo-Random Noise Code) of LTE system bandwidth, terminal Receive descending scheduling, once judge that the PRB scope of resource that eNB indicates in PDCCH signaling does not connects in the data that terminal is current In receipts frequency band, then terminal is according to the above-mentioned channel of configuration retaking of a year or grade of above-mentioned PDCCH channel or PBCH channel, to obtain downlink data biography Defeated band information.

By above description it can be seen that the embodiment of the present invention compares the most potential two kind bandwidth reduces scheme, this The scheme of bright embodiment can the down control channel design of compatible tradition LTE largely, it is not necessary to redesign descending Control area, reduces the impact on existing specification;Ascending control channel (including PUCCH channel, PRACH channel) also can be with tradition LTE terminal is compatible, thus does not has ascending resource fragment and the problem of extra upload control resource occupation.Compared to potential scheme 2, the embodiment of the present invention can reduce the cost of subframe further.

After using the embodiment of the present invention, frequency shared by the resource of terminal has been confined in small band broad frequency range, Therefore, when terminal is scheduling by eNB, the resource indication bit in down control channel PDCCH can only indicate little bandwidth frequency band In the range of resource, due to need instruction band bandwidth reduce, therefore can save resource indication bit expense, under minimizing Row controls total number of bits of channel PDCCH, and then promotes the transmission performance controlling channel.

Based on identical technology design, the embodiment of the present invention additionally provides a kind of network equipment that can be applicable to above-mentioned flow process And terminal unit.

Seeing Fig. 4, for the structural representation of the network equipment that the embodiment of the present invention provides, this network equipment can be base station Equipment.As it can be seen, this network equipment comprises the steps that

Transmission control module 401, for by the down control channel in LTE system control area, sending control to terminal Signaling processed, carries out downlink data transmission with dispatch terminal in described downlink data transmission frequency band;

Data transmission module 402, in described downlink data transmission frequency band, on this downlink data transmission frequency band Terminal carries out data transmission.

Concrete, between this network equipment and described terminal agreement have described downlink data transmission frequency band frequency position and Bandwidth information;Or, transmission control module 401 be additionally operable to by signaling by the frequency position of described downlink data transmission frequency band and Bandwidth information is indicated to described terminal, and wherein, the amount of bandwidth of each downlink data transmission frequency band is identical, part is identical or different.

Concrete, transmission control module 401 can be by the public search space of PBCH signaling or down control channel PDCCH signaling, is indicated to described terminal by frequency position and the bandwidth information of downlink data transmission frequency band;Wherein, transmission controls Module 401 can carry the frequency of downlink data transmission frequency band wherein by extending existing PBCH signaling or newly-increased PBCH signaling Position and bandwidth information.

Concrete, according to the type of the terminal for carrying out data transmission at described downlink data transmission frequency band, for difference The terminal of type is configured with the RNTI of correspondence;Accordingly, transmission control module 401 can send PDCCH signaling to described terminal Before, according to the type of described terminal, the RNTI scrambling configured for the type terminal is used to be sent to the PDCCH letter of described terminal Order.

Concrete, PDCCH signaling uses period assignment, described PDCCH signaling period in downlink radio frame or/and in subframe Occur;Accordingly, the described network equipment and described terminal agreement have the configuration information of described PDCCH signaling, or, transmission controls The configuration information of described PDCCH signaling is notified to described terminal by module 401 by broadcast signaling.

Concrete, transmission control module 401 can be according to for carrying out data transmission on described downlink data transmission frequency band The type of terminal, in PBCH channel, notify frequency position and the bandwidth of the downlink data transmission frequency band of all types of terminal successively Information.

Concrete, transmission control module 401 according to a preconcerted arrangement sequentially can transmit the descending of all types of terminal in PBCH channel The frequency position of data transmission frequency band and bandwidth information;Or, in advance by the frequency of the downlink data transmission frequency band of all types of terminals Point position and Bandwidth map are corresponding mark, and arrange transmission sequence between the described network equipment and described terminal;Described Transmission control module according to a preconcerted arrangement order, in PBCH channel transmission for represent downlink data transmission frequency band frequency position and The mark of bandwidth.

Concrete, transmission control module 401 is additionally operable to, when downlink data transmission band changes, by signaling by descending Data transmission frequency band change information notifies to described terminal.Concrete, transmission control module 401 can one of in the following manner will Downlink data transmission frequency band change information notifies to described terminal:

Mode 1: described terminal is sent the paging instruction of system message alteration, after notifying that described terminal reads renewal For the channel of bearing downlink data transmission frequency band information, the described channel for bearing downlink data transmission frequency band information is permissible It is the PDCCH channel of PBCH channel or public search space, wherein carries the frequency of the downlink data transmission frequency band after renewal Position and bandwidth information;

Mode 2: send PDCCH order order to described terminal, after carrying renewal in described PDCCH order order The frequency position of downlink data transmission frequency band and bandwidth information, or described PDCCHorder order in carry instruction letter Breath, reads the channel for bearing downlink data transmission frequency band information to indicate terminal to go, described for bearing downlink data biography The channel of defeated band information can be the PDCCH channel of PBCH channel or public search space, under wherein carrying after renewal The frequency of row data transmission frequency band and bandwidth information;

Mode 3: indicate, with indicating downlink number by increasing bit in the PDCCH signaling that described terminal is scheduling According to transmission band change information;

Mode 4: the signaling carrying downlink data transmission frequency band change information is transmitted in PDSCH channel, described change Change information includes: target frequency, entry-into-force time information.

Concrete, transmission control module 401 is in aforesaid way 3, in the PDCCH signaling being scheduling described terminal Carrying bit sequence, a corresponding working frequency points of bit in described bit sequence, when bit value is setting value, under expression The transmission of row data is carried out on the downlink data transmission frequency band that this bit is corresponding;Or, what described terminal was scheduling PDCCH signaling carries count value;Wherein, a downlink data transmission frequency is often changed in the scheduling of terminal by the described network equipment Band, then this count value adds 1, so that according to the count value of twice scheduling of front and back, terminal is judging that downlink data transmission frequency band becomes During change, remove to read the channel for bearing downlink data transmission frequency band information, described for bearing downlink data transmission frequency band letter The channel of breath can be the PDCCH channel of PBCH channel or public search space, wherein carries the downlink data after renewal and passes The frequency of defeated frequency band and bandwidth information.

Seeing Fig. 5, for the structural representation of the terminal unit that the embodiment of the present invention provides, this terminal can be that little bandwidth is whole End, such as MTC terminal.As it can be seen, this terminal unit comprises the steps that

Control data obtaining module 501, for receiving the descending control letter that the network equipment passes through in LTE system control area The control signaling that road sends;

Data transmission module 502, for according to described control signaling, on the downlink data transmission frequency band of described terminal, Receive the downlink data that the network equipment sends.

Concrete, between described terminal and the described network equipment, agreement has the frequency position of described downlink data transmission frequency band And bandwidth information;Or, controlling data obtaining module 501 and be additionally operable to, the signaling sent according to the described network equipment obtains described The frequency position of downlink data transmission frequency band and bandwidth information, wherein, the amount of bandwidth of each downlink data transmission frequency band is identical, portion Divide identical or different.

Concrete, control PBCH signaling or descending control that data obtaining module 501 can send according to the described network equipment The PDCCH signaling of the public search space of channel, obtains frequency position and the bandwidth information of downlink data transmission frequency band;Wherein, The described network equipment, by extending existing PBCH signaling or newly-increased PBCH signaling, carries the frequency of downlink data transmission frequency band wherein Point position and bandwidth information.

Concrete, according to the type of the terminal for carrying out data transmission at described downlink data transmission frequency band, for difference The terminal of type is configured with the RNTI of correspondence;Accordingly, control data obtaining module 501 to make according to type belonging to this terminal Described PDCCH signaling is received with corresponding RNTI.

Concrete, described PDCCH signaling uses period assignment, described PDCCH signaling period in downlink radio frame or/and son Frame occurs;Accordingly, described terminal and described network equipment agreement have the configuration information of described PDCCH signaling, or, control Data obtaining module 501 can obtain the configuration information of described PDCCH signaling by the broadcast signaling that the described network equipment sends.

Concrete, controlling data obtaining module 501 can receive the described network equipment in PBCH channel according to predefined procedure The frequency position of downlink data transmission frequency band corresponding to type belonging to this terminal sent and bandwidth information;Or, in advance will The frequency position of the downlink data transmission frequency band of all types of terminals and Bandwidth map are corresponding mark, and at the described network equipment And between described terminal, arrange transmission sequence, control data obtaining module 501 order according to a preconcerted arrangement, receive the described network equipment and exist Frequency position and the mark of bandwidth for representing downlink data transmission frequency band sent in PBCH channel, determines according to this mark The frequency position of corresponding downlink data transmission frequency band and bandwidth information.

Concrete, control data obtaining module 501 and by signaling, described downlink data can be passed at the described network equipment In the case of the frequency position of defeated frequency band and bandwidth information are indicated to described terminal, the signaling sent according to the described network equipment, Obtain frequency position and the bandwidth information of the downlink data transmission frequency band after updating;Or, find downlink data transmission frequency voluntarily After information change, obtain the downlink data transmission band information after updating.

Concrete, described signaling includes PDCCH or PBCH signaling, controls data obtaining module 501 and sets according to described network The signaling that preparation is sent, the mode of downlink data transmission band information after updating that obtains includes one below:

Mode 1: according to the described network equipment, the paging of the system message alteration that described terminal sends is indicated, read and update After the channel for bearing downlink data transmission frequency band information, obtain the downlink data transmission frequency band after the renewal wherein carried Frequency position and bandwidth information;This channel being used for bearing downlink data transmission frequency band information can be PBCH channel or public The PDCCH channel of search volume;

Mode 2: receive the PDCCH order order that the described network equipment sends, under obtaining after the renewal wherein carried The frequency position of row data transmission frequency band and bandwidth information;Or obtain the instruction information wherein carried, according to described instruction letter Breath reads the channel for bearing downlink data transmission frequency band information, the described letter for bearing downlink data transmission frequency band information Road can be the PDCCH channel of PBCH channel or public search space, wherein carries the downlink data transmission frequency band after renewal Frequency position and bandwidth information;

Mode 3: according to the described network equipment by the ratio increased in the PDCCH signaling that described terminal is scheduling Refer in particular to show, obtain frequency position and the bandwidth information of the downlink data transmission frequency band after updating;

Mode 4: according to the letter of the downlink data transmission frequency band change information that the described network equipment transmits in PDSCH channel Order, obtains frequency position and the bandwidth information of the downlink data transmission frequency band after updating, and described change information includes: target frequency Point, entry-into-force time information.

Concrete, control data obtaining module 501 specifically for, receive the described network equipment and described terminal adjusted The PDCCH signaling sent when spending, carries bit sequence in described signaling, a corresponding work of bit in described bit sequence Making frequency, described terminal is by the frequency position of the downlink data transmission frequency band corresponding to the bit of setting value in described bit sequence With bandwidth as the frequency position of downlink data transmission frequency band after updating and bandwidth information;

Or, receive the PDCCH signaling that the described network equipment sends when being scheduling described terminal, in described signaling Carrying count value, wherein, the scheduling of terminal is often changed a downlink data transmission frequency band, then this counting by the described network equipment Value adds 1;Whether described control data obtaining module changes according to the count value of twice scheduling of front and back judges downlink data transmission frequency Whether point changes, if judging, downlink data transmission frequency band changes, then read for bearing downlink data transmission frequency band The channel of information, with frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal that acquisition is wherein carried, described Channel for bearing downlink data transmission frequency band information can be the PDCCH channel of PBCH channel or public search space.

Control data obtaining module 501 and can find that one of in the following manner downlink data transmission band information becomes voluntarily Change, and obtain the downlink data transmission band information after renewal:

Mode 5: by the channel for bearing downlink data transmission frequency band information is detected, obtain the letter of this channel The frequency position of the downlink data transmission frequency band after the renewal carried in order and bandwidth information;

Mode 6: get downlink data transmission frequency band for the first time from the channel for bearing downlink data transmission frequency band information Frequency position and bandwidth information after, no longer detect this channel for bearing downlink data transmission frequency band information;When described The network equipment, to when detecting PDCCH instruction unsuccessfully in its scheduling process, reads this and is used for bearing downlink data transmission frequency band letter The channel of breath, with frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal that acquisition is wherein carried;

Mode 7: the PDCCH signaling sent according to the described network equipment, finds the PRB scope of resource indicated by this signaling not Time in the downlink data transmission frequency band that described terminal is current, read the channel for bearing downlink data transmission frequency band information, And obtain frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal wherein carried.

The above-mentioned band information channel stated for the transmission of bearing downlink data can be PBCH channel or public search space PDCCH channel.

It will be appreciated by those skilled in the art that the module in the device in embodiment can describe according to embodiment to carry out point It is distributed in the device of embodiment, it is also possible to carry out respective change and be disposed other than in one or more devices of the present embodiment.On The module stating embodiment can merge into a module, it is also possible to is further split into multiple submodule.

Through the above description of the embodiments, those skilled in the art is it can be understood that can be by the present invention Software adds the mode of required general hardware platform and realizes, naturally it is also possible to by hardware, but a lot of in the case of the former is more Good embodiment.Based on such understanding, prior art is contributed by technical scheme the most in other words Part can embody with the form of software product, and this computer software product is stored in a storage medium, if including Dry instruction is with so that a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) performs basis Invent the method described in each embodiment.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should Depending on protection scope of the present invention.

Claims (52)

1. a downlink data transmission method, is applied to Long Term Evolution LTE system, it is characterised in that described LTE system descending The data field of system operating band is configured with at least one downlink data transmission frequency band, and the band of each downlink data transmission frequency band The wide LTE system that is less than controls bandwidth shared by channel region, and the method includes:
The network equipment, by the down control channel in LTE system control area, sends control signaling to terminal, with dispatch terminal Downlink data transmission is carried out in described downlink data transmission frequency band;
The described network equipment, in described downlink data transmission frequency band, carries out data to the terminal on this downlink data transmission frequency band Transmission.
2. the method for claim 1, it is characterised in that between the described network equipment and described terminal agreement have described under The frequency position of row data transmission frequency band and bandwidth information;
Or, frequency position and the bandwidth information of described downlink data transmission frequency band are indicated to by the described network equipment by signaling Described terminal, wherein, the amount of bandwidth of each downlink data transmission frequency band is identical, part is identical or different.
3. method as claimed in claim 2, it is characterised in that the described network equipment passes through signaling by downlink data transmission frequency band Frequency position and bandwidth information be indicated to described terminal, including:
Under the described network equipment physics by Physical Broadcast Channel PBCH signaling or the public search space of down control channel Row controls channel PDCCH signaling, and frequency position and the bandwidth information of downlink data transmission frequency band are indicated to described terminal;Its In, the described network equipment, by extending existing PBCH signaling or newly-increased PBCH signaling, carries downlink data transmission frequency band wherein Frequency position and bandwidth information.
4. method as claimed in claim 3, it is characterised in that according to for carrying out data at described downlink data transmission frequency band The type of the terminal of transmission, is configured with the RNTI of correspondence for different types of terminal;
The described network equipment also included before described terminal sends PDCCH signaling: according to the type of described terminal, use as this The RNTI scrambling of type terminals configuration is sent to the PDCCH signaling of described terminal.
5. method as claimed in claim 3, it is characterised in that described PDCCH signaling uses period assignment, and described PDCCH believes Make the cycle in downlink radio frame or/and subframe occurs;
The described network equipment and described terminal agreement have the configuration information of described PDCCH signaling, or, the described network equipment passes through The configuration information of described PDCCH signaling is notified to described terminal by broadcast signaling.
6. method as claimed in claim 3, it is characterised in that the described network equipment passes through PBCH signaling, is passed by downlink data The frequency position of defeated frequency band and bandwidth information are indicated to described terminal, including:
The described network equipment is according to the type of the terminal for carrying out data transmission on described downlink data transmission frequency band, successively Frequency position and the bandwidth information of the downlink data transmission frequency band of all types of terminal is notified in PBCH channel.
7. method as claimed in claim 6, it is characterised in that described notify under all types of terminal in PBCH channel successively The frequency position of row data transmission frequency band and bandwidth information, including:
Described network equipment order according to a preconcerted arrangement, transmits the frequency of the downlink data transmission frequency band of all types of terminal in PBCH channel Point position and bandwidth information;
Or, it is corresponding mark by the frequency position of the downlink data transmission frequency band of all types of terminals and Bandwidth map in advance, And between the described network equipment and described terminal, arrange transmission sequence;Described network equipment order according to a preconcerted arrangement, believes at PBCH In road, transmission is for representing frequency position and the mark of bandwidth of downlink data transmission frequency band.
8. method as claimed in claim 2, it is characterised in that by signaling, described downlink data is passed at the described network equipment In the case of the frequency position of defeated frequency band and bandwidth information are indicated to described terminal, the method also includes:
When downlink data transmission band changes, the network equipment passes through signaling, is notified by downlink data transmission frequency band change information To described terminal.
9. method as claimed in claim 8, it is characterised in that the described network equipment passes through signaling by downlink data transmission frequency band Change information notifies to described terminal, including:
The described network equipment sends the paging instruction of system message alteration to described terminal, after notifying that described terminal reads renewal The channel for bearing downlink data transmission frequency band information;
Or, the described network equipment sends PDCCH order order to described terminal, carries in described PDCCH order order Have in frequency position and the bandwidth information of the downlink data transmission frequency band after renewal, or described PDCCH order order and carry There is instruction information, read the channel for bearing downlink data transmission frequency band information after updating to indicate terminal to go;
Or, the described network equipment indicates by increasing bit in the PDCCH signaling being scheduling described terminal, with instruction Downlink data transmission frequency band change information;
Or, the described network equipment will carry the signaling of downlink data transmission frequency band change information at Physical Downlink Shared Channel Transmitting in PDSCH channel, described change information includes: target frequency, entry-into-force time information.
10. method as claimed in claim 9, it is characterised in that the described network equipment is by being scheduling described terminal PDCCH signaling in increase bit instruction, with indicating downlink data transmission frequency band change information, including:
The described network equipment carries bit sequence in the PDCCH signaling being scheduling described terminal, in described bit sequence One corresponding working frequency points of bit, when bit value is setting value, represents that downlink data transmission is under this bit is corresponding Carry out in row data transmission frequency band;
Or, the described network equipment carries count value in the PDCCH signaling being scheduling described terminal;Wherein, described net The scheduling of terminal is often changed a downlink data transmission frequency band by network equipment, then this count value adds 1, so that terminal is according to front and back two The count value of secondary scheduling, when judging that downlink data transmission frequency band changes, goes to read for bearing downlink data transmission frequency band The channel of information, wherein carries frequency and the bandwidth information of the downlink data transmission frequency band after renewal.
11. methods as described in claim 9 or 10, it is characterised in that described for bearing downlink data transmission frequency band information Channel include: the PDCCH channel of PBCH channel or public search space.
12. the method for claim 1, it is characterised in that when described terminal is scheduling by the described network equipment, descending In control channel, the frequency resource scope indicated by resource indication bit is in whole LTE system bandwidth of operation or is limited to described In downlink data transmission frequency range.
13. such as claim 1-10, method as described in one of 12, it is characterised in that the shared band in described system control area is a width of LTE system bandwidth of operation.
14. 1 kinds of downlink data transmission methods, are applied to Long Term Evolution LTE system, it is characterised in that under described LTE system The data field of row system operating band is configured with at least one downlink data transmission frequency band, and each downlink data transmission frequency band Bandwidth controls bandwidth shared by channel region less than LTE system, and the method includes:
Terminal receives the control signaling that the network equipment is sent by the down control channel in LTE system control area;
Described terminal is according to described control signaling, on the downlink data transmission frequency band of described terminal, receives the network equipment and sends Downlink data.
15. methods as claimed in claim 14, it is characterised in that between described terminal and the described network equipment, agreement has described The frequency position of downlink data transmission frequency band and bandwidth information;
Or, described terminal obtains the frequency position of described downlink data transmission frequency band according to the signaling that the described network equipment sends And bandwidth information, wherein, the amount of bandwidth of each downlink data transmission frequency band is identical, part is identical or different.
16. methods as claimed in claim 15, it is characterised in that the signaling that described terminal sends according to the described network equipment obtains Take frequency position and the bandwidth information of described downlink data transmission frequency band, including:
PBCH signaling that described terminal sends according to the described network equipment or the public search space of down control channel PDCCH, obtains frequency position and the bandwidth information of downlink data transmission frequency band;Wherein, the described network equipment is existing by extension PBCH signaling or newly-increased PBCH signaling, carry frequency position and the bandwidth information of downlink data transmission frequency band wherein.
17. methods as claimed in claim 16, it is characterised in that according to at described downlink data transmission frequency band number According to the type of the terminal of transmission, it is configured with the RNTI of correspondence for different types of terminal;
Described terminal, according to type belonging to it, uses the RNTI of correspondence to receive described PDCCH signaling.
18. methods as claimed in claim 16, it is characterised in that described PDCCH signaling uses period assignment, described PDCCH Signaling period in downlink radio frame or/and in subframe occur;
Described terminal and described network equipment agreement have the configuration information of described PDCCH signaling, or, described terminal is by described The broadcast signaling that the network equipment sends obtains the configuration information of described PDCCH signaling.
19. methods as claimed in claim 16, it is characterised in that the PBCH that described terminal sends according to the described network equipment Signaling, obtains frequency position and the bandwidth information of downlink data transmission frequency band, including:
Described terminal, according to predefined procedure, receives type institute belonging to this terminal that the described network equipment sends in PBCH channel right The frequency position of the downlink data transmission frequency band answered and bandwidth information;
Or, it is corresponding mark by the frequency position of the downlink data transmission frequency band of all types of terminals and Bandwidth map in advance, And between the described network equipment and described terminal, arrange transmission sequence;Described terminal order according to a preconcerted arrangement, receives described network Frequency position and the mark of bandwidth for representing downlink data transmission frequency band that equipment sends in PBCH channel, according to this mark Know frequency position and the bandwidth information of the downlink data transmission frequency band determining correspondence.
20. methods as claimed in claim 15, it is characterised in that also include:
By signaling, frequency position and the bandwidth information of described downlink data transmission frequency band are indicated to institute at the described network equipment In the case of stating terminal, the signaling that described terminal sends according to the described network equipment, obtain the downlink data transmission frequency after updating The frequency position of band and bandwidth information;
Or, after described terminal finds the change of downlink data transmission band information voluntarily, obtain the downlink data transmission after updating Band information.
21. methods as claimed in claim 20, it is characterised in that the signaling that described terminal sends according to the described network equipment, Obtain the downlink data transmission band information after updating, including:
The paging of the system message alteration that described terminal sends is indicated by described terminal according to the described network equipment, reads after updating The channel for bearing downlink data transmission frequency band information, obtain the downlink data transmission frequency band after the renewal wherein carried Frequency position and bandwidth information;
Or, described terminal unit receives the PDCCH order order that the described network equipment sends, and obtains the renewal wherein carried After the frequency position of downlink data transmission frequency band and bandwidth information;Or obtain the instruction information wherein carried, according to described Instruction information reads the channel for bearing downlink data transmission frequency band information;
Or, described terminal according to the described network equipment by being increased in the PDCCH signaling that described terminal is scheduling Bit instruction, obtain the frequency position of downlink data transmission frequency band after updating and bandwidth information;
Or, the downlink data transmission frequency band change information that described terminal is transmitted in PDSCH channel according to the described network equipment Signaling, obtain the frequency position of downlink data transmission frequency band after updating and bandwidth information, described change information includes: target Frequency, entry-into-force time information.
22. methods as claimed in claim 21, it is characterised in that described terminal is passed through to described according to the described network equipment The bit instruction increased in the PDCCH signaling that terminal is scheduling, obtains the frequency of the downlink data transmission frequency band after updating Position and bandwidth information, including:
Described terminal receives the PDCCH signaling that the described network equipment sends when being scheduling described terminal, in described signaling Carrying bit sequence, a corresponding working frequency points of bit in described bit sequence, described terminal is by described bit sequence Frequency position and the bandwidth of the downlink data transmission frequency band corresponding to the bit of middle setting value pass as the downlink data after updating The frequency position of defeated frequency band and bandwidth information;
Or, described terminal receives the PDCCH signaling that the described network equipment sends, described letter when being scheduling described terminal Carrying count value in order, wherein, a downlink data transmission frequency band is often changed in the scheduling of terminal by the described network equipment, then should Count value adds 1;Whether described terminal changes according to the count value of twice scheduling of front and back judges whether downlink data transmission frequency is sent out Changing, if judging, downlink data transmission frequency band changes, then read the letter for bearing downlink data transmission frequency band information Road, with frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal that acquisition is wherein carried.
23. methods as claimed in claim 20, it is characterised in that described terminal finds downlink data transmission band information voluntarily After change, obtain the downlink data transmission band information after updating, including:
Described terminal, by detecting the channel for bearing downlink data transmission frequency band information, obtains the signaling of this channel In the frequency position of downlink data transmission frequency band after the renewal carried and bandwidth information;
Or, described terminal gets downlink data transmission frequency for the first time from the channel for bearing downlink data transmission frequency band information Behind the frequency position of band and bandwidth information, the no longer described channel for bearing downlink data transmission frequency band information of detection;Work as institute State terminal in the described network equipment is to its scheduling process to PDCCH instruction detect unsuccessfully time, read described in be used for bearing downlink The channel of data transmission frequency band information is to obtain frequency position and the band of the downlink data transmission frequency band after the renewal wherein carried Wide information;
Or, the PDCCH signaling that described terminal sends according to the described network equipment, find the PRB resource model indicated by this signaling When enclosing not in the downlink data transmission frequency band that described terminal is current, read the letter for bearing downlink data transmission frequency band information Road, and obtain frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal wherein carried.
24. methods as described in one of claim 21-23, it is characterised in that the described frequency for the transmission of bearing downlink data Information channel includes: the PDCCH channel of PBCH channel or public search space.
25. methods as claimed in claim 14, it is characterised in that when described terminal is scheduling by the described network equipment, under It is or to be limited to institute in whole LTE system bandwidth of operation that row controls the frequency resource scope in channel indicated by resource indication bit State in downlink data transmission frequency range.
26. such as claim 14-23, method as described in one of 25, it is characterised in that the shared band in described system control channels region A width of LTE system bandwidth of operation.
27. 1 kinds of network equipments, are applied to LTE system, it is characterised in that the downlink system working band of described LTE system Data field is configured with at least one downlink data transmission frequency band, and the bandwidth of each downlink data transmission frequency band is less than LTE system Controlling bandwidth shared by channel region, this network equipment includes:
Transmission control module, for by the down control channel in LTE system control area, sends control signaling to terminal, In described downlink data transmission frequency band, downlink data transmission is carried out with dispatch terminal;
Data transmission module, in described downlink data transmission frequency band, enters the terminal on this downlink data transmission frequency band Row data are transmitted.
28. network equipments as claimed in claim 27, it is characterised in that between the described network equipment and described terminal there be agreement The frequency position of described downlink data transmission frequency band and bandwidth information;
Or, described transmission control module is additionally operable to, by signaling by the frequency position of described downlink data transmission frequency band and band Wide information is indicated to described terminal, and wherein, the amount of bandwidth of each downlink data transmission frequency band is identical, part is identical or different.
29. network equipments as claimed in claim 28, it is characterised in that described transmission control module specifically for, pass through The PDCCH signaling of the public search space of PBCH signaling or down control channel, by the frequency position of downlink data transmission frequency band It is indicated to described terminal with bandwidth information;Wherein, described transmission control module is by extending existing PBCH signaling or newly-increased PBCH Signaling, carries frequency position and the bandwidth information of downlink data transmission frequency band wherein.
30. network equipments as claimed in claim 29, it is characterised in that according to for entering at described downlink data transmission frequency band The type of the terminal of row data transmission, is configured with the RNTI of correspondence for different types of terminal;
Described transmission control module is additionally operable to, before sending PDCCH signaling to described terminal, according to the type of described terminal, The RNTI scrambling configured for the type terminal is used to be sent to the PDCCH signaling of described terminal.
31. network equipments as claimed in claim 29, it is characterised in that described PDCCH signaling uses period assignment, described PDCCH signaling period in downlink radio frame or/and in subframe occur;
The described network equipment and described terminal agreement have the configuration information of described PDCCH signaling, or, described transmission control module By broadcast signaling, the configuration information of described PDCCH signaling is notified to described terminal.
32. network equipments as claimed in claim 29, it is characterised in that described transmission control module specifically for, according to In the type of the terminal carried out data transmission on described downlink data transmission frequency band, notify all types of successively in PBCH channel The frequency position of the downlink data transmission frequency band of terminal and bandwidth information.
33. network equipments as claimed in claim 32, it is characterised in that described transmission control module specifically for, according to about Definite sequence, transmits frequency position and the bandwidth information of the downlink data transmission frequency band of all types of terminal in PBCH channel;Or, It is corresponding mark by the frequency position of the downlink data transmission frequency band of all types of terminals and Bandwidth map in advance, and at described net Transmission sequence is arranged between network equipment and described terminal;Described transmission control module order according to a preconcerted arrangement, passes in PBCH channel Defeated frequency position for representing downlink data transmission frequency band and the mark of bandwidth.
34. network equipments as claimed in claim 28, it is characterised in that described transmission control module is additionally operable to, instantly line number When changing according to transmission band, by signaling, downlink data transmission frequency band change information is notified to described terminal.
35. network equipments as claimed in claim 34, it is characterised in that described transmission control module specifically for, to described Terminal sends the paging instruction of system message alteration, to notify that described terminal reads transmitting for bearing downlink data after updating The channel of band information;
Or, send PDCCH order order to described terminal, under described PDCCH order order carries after renewal The frequency position of row data transmission frequency band and bandwidth information, or described PDCCHorder order carry instruction information, with Instruction terminal goes to read the channel for bearing downlink data transmission frequency band information after updating;
Or, indicate by increasing bit in the PDCCH signaling that described terminal is scheduling, transmit with indicating downlink data Frequency band change information;
Or, the signaling carrying downlink data transmission frequency band change information is transmitted in PDSCH channel, described change information Including: target frequency, entry-into-force time information.
36. network equipments as claimed in claim 35, it is characterised in that described transmission control module specifically for, to institute State and the PDCCH signaling that terminal is scheduling is carried bit sequence, a corresponding work frequency of bit in described bit sequence Point, when bit value is setting value, represents that downlink data transmission is carried out on the downlink data transmission frequency band that this bit is corresponding;
Or, in the PDCCH signaling that described terminal is scheduling, carry count value;Wherein, the described network equipment is to terminal Scheduling often change a downlink data transmission frequency band, then this count value adds 1, so that terminal is according to the counting of twice scheduling of front and back Value, when judging that downlink data transmission frequency band changes, goes to read the channel for bearing downlink data transmission frequency band information, Wherein carry frequency and the bandwidth information of the downlink data transmission frequency band after renewal.
37. network equipments as described in claim 35 or 36, it is characterised in that described for bearing downlink data transmission frequency band The channel of information includes: the PDCCH channel of PBCH channel or public search space.
38. network equipments as claimed in claim 27, it is characterised in that described terminal is scheduling by the described network equipment Time, in down control channel frequency resource scope indicated by resource indication bit be in whole LTE system bandwidth of operation or It is limited in described downlink data transmission frequency range.
39. such as claim 27-36, the network equipment as described in one of 38, it is characterised in that the shared band in described system control area A width of LTE system bandwidth of operation.
40. 1 kinds of terminal units, are applied to LTE system, it is characterised in that the downlink system working band of described LTE system Data field is configured with at least one downlink data transmission frequency band, and the bandwidth of each downlink data transmission frequency band is less than LTE system Controlling bandwidth shared by channel region, this terminal unit includes:
Control data obtaining module, for receiving the down control channel transmission that the network equipment passes through in LTE system control area Control signaling;
Data transmission module, for according to described control signaling, on the downlink data transmission frequency band of described terminal, receives network The downlink data that equipment sends.
41. terminal units as claimed in claim 40, it is characterised in that between described terminal and the described network equipment there be agreement The frequency position of described downlink data transmission frequency band and bandwidth information;
Or, described control data obtaining module is additionally operable to, and obtains described lower line number according to the signaling that the described network equipment sends According to frequency position and the bandwidth information of transmission band, wherein, the amount of bandwidth of each downlink data transmission frequency band is identical, part is identical Or it is different.
42. terminal units as claimed in claim 41, it is characterised in that described control data obtaining module is specifically for, root The PBCH signaling sent according to the described network equipment or the PDCCH signaling of the public search space of down control channel, obtain descending The frequency position of data transmission frequency band and bandwidth information;Wherein, the described network equipment is by extending existing PBCH signaling or newly-increased PBCH signaling, carries frequency position and the bandwidth information of downlink data transmission frequency band wherein.
43. terminal units as claimed in claim 42, it is characterised in that according to for entering at described downlink data transmission frequency band The type of the terminal of row data transmission, is configured with the RNTI of correspondence for different types of terminal;
Described control data obtaining module specifically for, according to type belonging to this terminal, use the RNTI of correspondence to receive described PDCCH signaling.
44. terminal units as claimed in claim 42, it is characterised in that described PDCCH signaling uses period assignment, described PDCCH signaling period in downlink radio frame or/and in subframe occur;
Described terminal and described network equipment agreement have the configuration information of described PDCCH signaling, or, described control acquisition of information Module obtains the configuration information of described PDCCH signaling by the broadcast signaling that the described network equipment sends.
45. terminal units as claimed in claim 42, it is characterised in that described control data obtaining module is specifically for, root According to predefined procedure, receive the downlink data biography corresponding to type belonging to this terminal that the described network equipment sends in PBCH channel The frequency position of defeated frequency band and bandwidth information;
Or, it is corresponding mark by the frequency position of the downlink data transmission frequency band of all types of terminals and Bandwidth map in advance, And between the described network equipment and described terminal, arrange transmission sequence;Described control data obtaining module order according to a preconcerted arrangement, Receive that the described network equipment sends in PBCH channel for representing the frequency position of downlink data transmission frequency band and bandwidth Mark, determines frequency position and the bandwidth information of the downlink data transmission frequency band of correspondence according to this mark.
46. terminal units as claimed in claim 41, it is characterised in that described control data obtaining module is additionally operable to, in institute State the network equipment, by signaling, frequency position and the bandwidth information of described downlink data transmission frequency band are indicated to described terminal In the case of, the signaling sent according to the described network equipment, obtain frequency position and the band of the downlink data transmission frequency band after updating Wide information;Or, after finding the change of downlink data transmission band information voluntarily, obtain the downlink data transmission frequency band letter after updating Breath.
47. terminal units as claimed in claim 46, it is characterised in that described control data obtaining module specifically for:
According to the described network equipment, the paging of the system message alteration that described terminal sends is indicated, read being used for after updating and hold Carry the channel of downlink data transmission band information, obtain the frequency position of the downlink data transmission frequency band after the renewal wherein carried And bandwidth information;
Or, receive the PDCCH order order that the described network equipment sends, obtain the downlink data after the renewal wherein carried The frequency position of transmission band and bandwidth information;Or obtain the instruction information wherein carried, read according to described instruction information The channel for bearing downlink data transmission frequency band information after renewal, obtains the frequency of the downlink data transmission frequency band wherein carried Point position and bandwidth information;
Or, refered in particular to by the ratio increased in the PDCCH signaling that described terminal is scheduling according to the described network equipment Show, obtain frequency position and the bandwidth information of the downlink data transmission frequency band after updating;
Or, according to the signaling of the downlink data transmission frequency band change information that the described network equipment transmits in PDSCH channel, Obtaining frequency position and the bandwidth information of the downlink data transmission frequency band after updating, described change information includes: target frequency, life Effect temporal information.
48. terminal units as claimed in claim 47, it is characterised in that described control data obtaining module specifically for, connect Receive the PDCCH signaling that the described network equipment sends when being scheduling described terminal, described signaling carry bit sequence, A corresponding working frequency points of bit in described bit sequence, described terminal is by the bit institute of setting value in described bit sequence The frequency position of corresponding downlink data transmission frequency band and bandwidth are as the frequency position of the downlink data transmission frequency band after updating And bandwidth information;
Or, receive the PDCCH signaling that the described network equipment sends when being scheduling described terminal, described signaling carried Having count value, wherein, the scheduling of terminal is often changed a downlink data transmission frequency band by the described network equipment, then this count value adds 1;Whether described control data obtaining module changes according to the count value of twice scheduling of front and back judges that downlink data transmission frequency is No changing, if judging, downlink data transmission frequency band changes, then read for bearing downlink data transmission frequency band information Channel, to obtain frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal wherein carried.
49. terminal units as claimed in claim 46, it is characterised in that described control data obtaining module specifically for, logical Cross and the channel for bearing downlink data transmission frequency band information is detected, obtain the downlink data after the renewal wherein carried The frequency position of transmission band and bandwidth information;
Or, the frequency of downlink data transmission frequency band is got for the first time from the channel for bearing downlink data transmission frequency band information Behind position and bandwidth information, no longer detect described channel;When at the described network equipment to its scheduling process in PDCCH instruction inspection When dendrometry loses, under the described channel for bearing downlink data transmission frequency band information of reading is to obtain after the renewal wherein carried The frequency position of row data transmission frequency band and bandwidth information;
Or, the PDCCH signaling sent according to the described network equipment, find that the PRB scope of resource indicated by this signaling is not in institute When stating in the downlink data transmission frequency band that terminal is current, read the channel for bearing downlink data transmission frequency band information, and obtain Take frequency position and the bandwidth information of the downlink data transmission frequency band after the renewal wherein carried.
50. terminal units as described in one of claim 47-49, it is characterised in that described for the transmission of bearing downlink data Band information channel include: the PDCCH channel of PBCH channel or public search space.
51. terminal units as claimed in claim 40, it is characterised in that described terminal is scheduling by the described network equipment Time, in down control channel frequency resource scope indicated by resource indication bit be in whole LTE system bandwidth of operation or It is limited in described downlink data transmission frequency range.
52. such as claim 40-49, terminal unit as described in one of 51, it is characterised in that described system control channels region institute Account for a width of LTE system bandwidth of operation of band.
CN201210020090.1A 2012-01-21 2012-01-21 A kind of downlink data transmission method and equipment thereof CN103220796B (en)

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