CN106304343A - Method and device thereof for the transmission of MTC device data - Google Patents
Method and device thereof for the transmission of MTC device data Download PDFInfo
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- CN106304343A CN106304343A CN201510250756.6A CN201510250756A CN106304343A CN 106304343 A CN106304343 A CN 106304343A CN 201510250756 A CN201510250756 A CN 201510250756A CN 106304343 A CN106304343 A CN 106304343A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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Abstract
The present invention relates to a kind of in base station end assist MTC device implement data transmission method and device, and a kind of in MTC device implement data transmission method and device.The method assisting MTC device to implement data transmission in base station end includes that MTC available band is divided by step: A., to determine multiple candidate's subband；B. the sets of subbands of MTC device is formed；C. the MTC device needing to implement frequency hopping is determined whether there is, when it is present；C1. the MTC device implementing frequency hopping is needed to distribute a set side-play amount for each；C2. determine that continuously transmits a value for each MTC device needing to implement frequency hopping；C3. described sets of subbands, described set side-play amount and the described value that continuously transmits are sent to corresponding MTC device；C4. data transmission is implemented with MTC device；C5. take situation based on channel quality and/or the subband of each subband in described sets of subbands, choose new subband to replace the subband that in described sets of subbands, channel quality is poor and/or the subband that will be taken by non-MTC device.
Description
Technical field
The present invention relates to wireless communication field, in particular it relates to one is in base station end
Auxiliary MTC device implements method and the device thereof of data transmission, and one is in MTC device
The method of middle enforcement data transmission and device thereof.
Background technology
In Rel-13, MTC (machine type communication) work item is reached an agreement, need into
One step reduces the complexity of MTC device user side.In order to increase covering of MTC device user side
Lid intensity and improvement power attenuation.Low cost MTC user side can be equipped with a lower power
Amplifier, it can cause the loss of covering performance, so needing the signal strengthening about 18dB to cover
Lid intensity.Maximally effective coverage enhancement technology is to retransmit (repetition).18dB is covered
Enhancing, need to be performed more than 300 times and retransmit.This dramatically reduces the efficiency of frequency spectrum.Subtract
Retransmitting most important method less is frequency hopping.This comes into question in Ran1#80bis and passed through can
To support frequency hopping.But concrete scheme is uncertain.Because frequency hopping is important for MTC and forces
, ask so solving this by definition for the hopping scheme of low cost MTC in the present invention
Topic.
Two kinds of frequency hopping, type-1 and type-2 is defined for PUSCH in LTE.
Type-2 performance is more preferable.The ultimate principle of type-2 is that whole frequency range is divided into 2 or 4 sons
Frequency range, and select a frequency sub-band to implement frequency hopping based on prime sequence (pseudo-random sequence).
Owing to the bandwidth of the MTC device of low cost is narrow, so setting at the MTC of low cost
A standby subframe is merely capable of receiving 6 Physical Resource Block (PRB), and it needs
The time of one subframe to reset to next different sub-band, compared to normal UE equipment
(MTC device of non-low cost), when this characteristic causes the frequency hopping of MTC device to have different
Sequence, and this collision conflict being likely to result in transmission.Secondly, cover strong for enhancing signal
Degree, low cost MTC device may need to retransmit for hundreds of times, and normal in order to retransmit identical data
Often need frequency hopping, and normal UE any sequential in transmitting procedure can receive scheduling letter
Breath, so normal UE equipment is more flexible.It addition, MTC device can only receive 6
PRBs, so for the system of 20MHz, the bandwidth of 20MHz can be divided into 17 MTC
Sub-band, the scheme of existing 4 frequency hopping sub-bands seems the thinnest for MTC device
Cause, enough multiformity are not provided.Therefore, existing PUSCH hopping scheme is not suitable for low
Cost MTC device.
Summary of the invention
In order to realize the purpose of the present invention, a first aspect of the present invention provides a kind of in base station end
Middle auxiliary MTC device implements the method for data transmission, wherein, including step: A. is according to MTC
The receptivity of equipment, divides MTC available band, to determine multiple candidate's subband；
B. from the plurality of candidate's subband, the first quantity subband is chosen, to form described MTC device
Sets of subbands；C. whether there is the MTC device needing to implement frequency hopping in determining community, when depositing
Time；C1. the MTC device implementing frequency hopping is needed to distribute a set side-play amount for each；C2.
According to coverage enhancement rank and the demand of channel measurement, set for each MTC needing to implement frequency hopping
For determining that continuously transmits a value；C3. described sets of subbands, described set side-play amount and described
Continuously transmit value to send to corresponding MTC device；C4. with the MTC device in described community
Each self-corresponding subband is implemented data transmission；C5. based on each subband in described sets of subbands
Channel quality and/or subband take situation, choose new subband to replace in described sets of subbands
Subband that channel quality is poor and/or the subband that will be taken by non-MTC device, implement step C.
Particularly, each subband in described sets of subbands is arranged by frequency band size order,
Or by pseudo-random sequence arrangement.
Particularly, described set side-play amount make described need implement frequency hopping MTC device will not
Use the same a running time-frequency resource of an identical subband simultaneously.
Particularly, in step C1, described set side-play amount is the mark according to MTC device
Determine.
Particularly, the initial time of the first time frequency hopping of the MTC device in described community is relative
Together.
Particularly, in step C2, the described MTC device use one needing to implement frequency hopping
Identical continuously transmits value.
Particularly, in step C2, the described MTC device needing to implement frequency hopping uses respectively
First continuously transmits value Y1 or second continuously transmits value Y2, wherein, and Y2=n × (Y1+1)-1,
N is natural number.
Particularly, in step C3, described base station by broadcast by the way of in described community
MTC device sends described sets of subbands；Described base station by RRC signaling or DCI signaling to
The MTC device of described correspondence sends described set side-play amount and described continuously transmits value.
Particularly, in step C5, specifically include step: C51. confirm in described sets of subbands each
The channel quality of individual subband and/or subband take situation；C52. in the plurality of candidate's subband
Choose the subband that the second quantity is new；C53. replace described with the subband that described second quantity is new
Subband that in sets of subbands, channel quality is poor and/or the subband that will be taken by non-MTC device,
And update described sets of subbands.
Particularly, specifically include in described C51 step: according to MTC device send descending
The measurement result of channel quality, confirms the channel quality of each subband in described sets of subbands；Or
The reference signal of the PUSCH that person receives according to described base station, confirms in described sets of subbands each
The channel quality of individual subband.
Particularly, the measurement knot of the down channel quality sent according to MTC device when described base station
Really, when confirming the channel quality of each subband in described sets of subbands: base station is to repeating transmission
Number of times, original position, across sub-frame chan-nel estimate number make restriction, so that base station can
The channel quality of subband is confirmed by assessment continuous print subframe.
Particularly, specifically include in described C52 step: top-quality two of acknowledgement channel
Candidate's subband whether is there is between the frequency band of subband；-when it is present: best from described channel quality
Two subbands frequency band between choose candidate's subband as the new son of described second quantity
A new subband in band；-in the presence of not: randomly select from the plurality of candidate's subband
Described second quantity candidate's subband is as described new subband.
A second aspect of the present invention provide a kind of in MTC device end implement data transmission
Method, wherein, including step: I. receives sets of subbands, set side-play amount and continuously from base station side
Transmission value；II. described MTC device is determined according to described sets of subbands and described set side-play amount
The frequency hop sequence of subband；III. according to the frequency hop sequence of described subband with described continuously transmit value,
Frequency hopping is implemented during described base station sends data.
Particularly, further comprise the steps of: the transmission quality of the down channel measured in each subband,
And to described base station feedback measurement result.
A third aspect of the present invention provides a kind of auxiliary MTC device enforcement number in base station end
Device according to transmission, it is characterised in that including: sub-band division unit, it is configured to basis
The receptivity of MTC device, divides MTC available band, to determine multiple candidate
Subband；Set setup unit, it is configured to choose the first number from the plurality of candidate's subband
Amount subband, to form the sets of subbands of described MTC device；Confirmation unit, it is configured to
The MTC device needing to implement frequency hopping whether is there is in determining community；Side-play amount allocation unit, its
It is configured to distribute a set side-play amount for each MTC device needing to implement frequency hopping；Continuously
Transmission value unit, it is configured to the needs according to coverage enhancement rank and channel measurement, for often
The individual MTC device needing to implement frequency hopping determines that continuously transmits a value；Data transmission unit, its
It is configured to described sets of subbands, described set side-play amount and the described value that continuously transmits send extremely
In corresponding MTC device；And with the MTC device in described community at each self-corresponding son
Data transmission is implemented on band；Set changing unit, it is configured to based in described sets of subbands
Channel quality and/or the subband of each subband take situation, choose new subband to replace described son
Subband that in band set, channel quality is poor and/or the subband that will be taken by non-MTC device.
A fourth aspect of the present invention provide a kind of in MTC device end implement data transmission
Device, it is characterised in that including: transmission unit, it is configured to receive subband set from base station side
Close, gather side-play amount and continuously transmit value, and be configured to implement data transmission with base station；
Sequentially confirmation unit, it is configured to determine according to described sets of subbands and described set side-play amount
The frequency hop sequence of the subband of described MTC device；Frequency hopping unit, it is configured to according to described son
The frequency hop sequence of band and described continuously transmit value, transmits number at described transmission unit with described base station
Control described transmission unit during according to and implement frequency hopping.
The method disclosed in the present and device are particularly well-suited to the MTC of low cost and carry out data
Transmission, not only increases the coverage enhancement performance of MTC device, it is to avoid in data transmission procedure
Data collision, and the subband in sets of subbands can be adjusted, improve data transmission efficiency.
Accompanying drawing explanation
By reading retouching in detail with reference to made non-limiting example is made of the following drawings
Stating, the other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows and assists MTC device real in base station end according to one disclosed in this invention
Execute the flow chart of the method for data transmission；
Fig. 2 shows and assists MTC device real in base station end according to one disclosed in this invention
Execute the module map of the device of data transmission；
Fig. 3 shows have difference continuously transmit two MTC of value according to disclosed in this invention
The frequency hopping schematic diagram of equipment；
Fig. 4 shows and uses new subband to replace sets of subbands according to MTC disclosed in this invention
The poor subband of middle channel quality implements the schematic diagram of frequency hopping；
Fig. 5 shows and implements data transmission in MTC device according to one disclosed in this invention
The flow chart of method；
Fig. 6 shows and implements data transmission in MTC device according to one disclosed in this invention
The module map of device；And
Fig. 7 shows the test result comparison diagram of prior art and the weak change of channel of the present invention.
Detailed description of the invention
In the specific descriptions of following preferred embodiment, by with reference to constituting a present invention part
Appended accompanying drawing.Appended accompanying drawing has been illustrated by way of example the spy being capable of the present invention
Fixed embodiment.The embodiment of example is not intended as the limit all embodiments according to the present invention.
It is appreciated that without departing from the scope of the present invention, it is possible to use other embodiments,
Structural or the amendment of logicality can also be carried out.Therefore, following specific descriptions not limit
Property processed, and the scope of the present invention is defined by the claims appended hereto.Although additionally, explanation
Book describes the step of method in a particular order, but this does not requires that or implies necessary
Perform these operations according to this particular order, or have to carry out the most shown operation ability
Realizing desired result, on the contrary, the step of description can change execution sequence.Additionally or standby
Multiple steps are merged into a step and are performed by selection of land, it is convenient to omit some step, and/or will
One step is decomposed into multiple step and performs.
For convenience of description, in the present invention, whole available band the sub-band quilt marked off
Referred to as subband.
First, we combine Fig. 1 and Fig. 2 and introduce enforcement in base station end disclosed in this invention
Auxiliary MTC device implement data transmission method and device.As shown in Figure 2 in base station
The auxiliary MTC device implemented in end is implemented the device 200 of data transmission and is included: sub-band division list
Unit 202, set setup unit 204, confirmation unit 206, side-play amount allocation unit 208, company
Resume defeated value cell 210, data transmission unit 212, set changing unit 214.
In a step 102, sub-band division unit 202 is according to the receptivity of MTC device, right
MTC available band divides, to determine multiple candidate's subband.
Concrete, sub-band division unit 202 can receive Physical Resource Block according to MTC device
The system bandwidth of whole MTC device is implemented to divide by maximum quantity.Such as, if MTC sets
For can only receive 6 PRBs, then for the bandwidth of 20MHz, it can be divided
Become 17 subbands.The most each subband is candidate's subband.Obtain candidate's subband it
After, these candidate's subbands of sub-band division unit 202 send to set setup unit 204, with from
In select suitable subband composition for the sets of subbands of MTC frequency hopping.
At step 104, set setup unit 204 chooses the from above-mentioned multiple candidate's subbands
One quantity subband, to form the sets of subbands of MTC device.
For frequency hopping, it is preferred to use abundant frequency hopping subband, with smoothed channel variable.But
For low cost MTC device, each frequency hopping is required for the readjustment time of a sub-frame frequency, and
And in order to the estimation of sub-band channel needs to continuously transmit multiple subframe in a same sub-band, because of
This too much frequency hopping subband can increase the complexity of system.In the present invention by limited number
Sub-band on implement frequency hopping, to prevent too many son while increasing the change of enough subbands
Frequency band is used for frequency hopping, thus increases system complexity reducing and clash with normal users end
Probability.
Concrete, collective's setup unit 204 is by smoothing to system complexity with to channel variable
Requirement weigh, to determine quantity N of subband in the sets of subbands of MTC frequency hopping.
This sets of subbands refers to that MTC device may be used for the set of the subband of frequency hopping.Such as, show above-mentioned
In example, when MTC device is confirmed as needing to implement frequency hopping in 6 subbands, collective sets
17 candidate's subbands that unit 204 can receive from it select 6 subbands, and generates son
Band set.It is pointed out that collective's setup unit 204 can be tied selecting subband when
The service condition closing candidate's subband decides whether to select this candidate's subband to jump as MTC
Element in the sets of subbands of frequency, when this candidate's subband is by the MTC device of other non-low costs
Take, then this candidate's subband is using being not selected as the element in sets of subbands, to prevent data
The collision of transmission and conflict.
In a specific embodiment, the element in this sets of subbands, i.e. subband, be by son
The frequency band size order of band is arranged in order, and such as sets of subbands is { S1, S2, S3}, then S1
Frequency band more than the frequency band of S2, then the frequency band of the S2 frequency band more than S3, vice versa.Separately
In one specific embodiment, the element in this sets of subbands, i.e. subband, be by prime sequence,
That is: pseudo-random sequence, arrangement.
After having set sets of subbands, 204 these sets of subbands of collective's setup unit send extremely
Data transmission unit 212, in case being sent to MTC device.
In step 106, whether exist in confirmation unit 206 determines community and need to transmit data
And implement the MTC device of frequency hopping: need transmit data and implement frequency hopping when not existing in community
During MTC device, confirmation unit 206 can be reaffirmed after certain interval of time；When in community
When existence needs transmit data and implement the MTC device of frequency hopping, confirmation unit 206 is notified that partially
Shifting amount allocation unit 208 and continuously transmit value cell 210.
In step 108, side-play amount allocation unit 208 is each MTC needing to implement frequency hopping
Equipment distributes a set side-play amount, and the set side-play amount after this distribution is sent to data biography
Defeated unit 212.
If the MTC device in community is all carried out according to putting in order of subband in sets of subbands
Frequency hopping, then can occur data transmission conflict.To this end, use the MTC device of same sub-band set
When implementing frequency hopping, its subband used should mutually stagger.In the present invention, set skew
The effect of amount is exactly: make the MTC device needing to implement frequency hopping will not use simultaneously one identical
The same a running time-frequency resource of subband.
Such as, there are three MTC device M1, M2, M3 real when transmitting data in community
Executing frequency hopping, they share a sets of subbands { S1, S2, S3}, then the set skew of M1
Amount can be set to 0, does not offsets, still with original sets of subbands { S1, S2, S3}；M2's
Set side-play amount can be set to 1, i.e. element left shift in sets of subbands 1, thus becomes
{ S2, S3, S1}；The set side-play amount of M3 can be set to 2, i.e. element in sets of subbands
Left shift 2, thus become { S3, S1, S2}.In this way, three MTC device
Would not rush when implementing frequency hopping according to the sub-band sequence in the sets of subbands after each skew
Prominent.
In a specific embodiment, side-play amount allocation unit 208 is that each needs implements to jump
The set side-play amount of the MTC device distribution of frequency is the size of the mark (No. ID) according to MTC
It is sequentially allocated, it may be assumed that the set side-play amount of first (ID is minimum/big) MTC device is 0,
Second (ID time is little/big) is 1, the like, until the value of set side-play amount is subband
In set, number of elements subtracts 1.Such as, have 5 elements in sets of subbands, then set side-play amount is
It mostly is 4.Can not be in this sets of subbands for being not assigned to gather the MTC device of side-play amount
In subband on implement frequency hopping.
In another specific embodiment, side-play amount allocation unit 208 is implemented for each needs
The set side-play amount of the MTC device distribution of frequency hopping is the mould of the mark (No. ID) according to MTC
Operation result distribute.Such as, if in sets of subbands, the quantity of element is 4, then
Calculate: ID Mod 4, its result is the set side-play amount of each MTC device.If there is
The situation that the set side-play amount of multiple MTC device is identical, the most only ID is minimum or maximum
MTC device is allocated this set side-play amount.Such as ID is the MTC device of 13, and ID is
The set side-play amount of the MTC device of 9 is all 1, and among them, only one of which can obtain this collection
Close side-play amount.
In step 110, continuously transmit value cell 210 to survey according to coverage enhancement rank and channel
For each MTC device needing to implement frequency hopping, the needs of amount, determine that continuously transmits value Y.
Continuously transmit value Y and refer to before each frequency hopping, required transmission in a subband
The quantity of continuous print subframe.The quantity of the subframe owing to continuously transmitting in a subband can affect
Coverage enhancement, and sufficient amount of continuous print subframe must be had in a subband to be transmitted
Can guarantee that correctly carrying out of channel quality measurement.Therefore must certain amount of company in a subband
Continuous subframe is transmitted, and the unification that this quantity should be tried one's best.
In a specific embodiment, continuously transmit value cell 210 and implement to jump for each needs
The MTC device of frequency determines and identical continuously transmits value, i.e. each MTC is from a subband
Frequency hopping is to the continuous print subframe that must transmit equal number before another subband.
In another specific embodiment, continuously transmitting value is two kinds, it may be assumed that Y1, Y2, even
Resume defeated value cell 210 according to coverage enhancement rank and the needs of channel measurement, determine wherein one
Kind continuously transmits value for each MTC device needing enforcement frequency hopping.Wherein both transmission values
There is following mathematical relationship Y2=n × (Y1+1)-1.Wherein n is natural number.So set
It is so that there is difference and continuously transmit the MTC device of value and can align when frequency hopping switches,
Thus the Appropriate application of beneficially frequency resource.
It is pointed out that in the above two embodiments, first time of each MTC device or
The initial time of person's frequency hopping at least one times is alignment.Fig. 3 shows that having difference continuously transmits
The frequency hopping schematic diagram of two MTC device of value, wherein, the value that continuously transmits of user 1 is Y1=4,
The value that continuously transmits of user 2 is Y2=9, n=2, and user 1 implements after often transmitting 4 subframes
Frequency hopping, user 2 implements frequency hopping after often transmitting 9 subframes.From figure it is found that due to
There is difference continuously transmit first time of two MTC subscriber equipmenies of value or jump at least one times
The initial time of frequency aligns, and therefore they can realize frequency hopping simultaneously when certain frequency hopping,
Such that it is able to mutually skip in the subband that the other side is currently shared.Thus improve band resource
Utilization rate.
After distributing and continuously transmitting value, continuously transmit 210 each MTC device of value cell
Continuously transmit the transmission of value Y in data transmission unit 212.
In step 112, its received sets of subbands, collection of data transmission unit 212
Close side-play amount and continuously transmit in the MTC device that value sends extremely correspondence.
Concrete, data transmission unit 212 can be by the way of broadcast in described community
MTC device sends described sets of subbands, and can by RRC signaling or DCI signaling to
Corresponding MTC device sends set side-play amount and continuously transmits value.
In step 114, data transmission unit 212 and each MTC device implement data transmission.
In a specific embodiment, data transmission unit 212 receives by respectively from MTC device
The quality report of the down channel of each subband measured by individual MTC device.
In another specific embodiment, the uplink signal-channel quality in data transmission unit 212 is measured
Module (not shown) can be when data transmission unit 212 implements data transmission, to reception
To the reference signal of PUSCH be analyzed confirming the uplink signal-channel quality of each subband, and
Generate the quality report of corresponding up channel.
So that the measurement of the channel quality to each subband can be implemented in base station, base station is permissible
Arrange as follows and estimate across sub-frame chan-nel:
1. the concrete number estimated across sub-frame chan-nel is not specified in base station, and only limits maximum possible
Across the number that sub-frame chan-nel is estimated, the concrete number estimated across sub-frame chan-nel by UE according to continuous
Transmission value and the number of subframes continuously transmitted in particular sub-band are decided in its sole discretion, or
2. the number of times repeating transmission implemented to strengthen covering is the integral multiple continuously transmitting value
Or half, and repeat to transmit always continuously transmitting corresponding to a certain subband from frequency hopping template
First beginning of subframe, the number then estimated across sub-frame chan-nel if carried out frequency error factor is automatic
Subtract one, or
Transmission that the most each channel is initial or retransmit subframe from frequency hopping template corresponding to a certain subband
First beginning continuously transmitting subframe, if first is occupied or for frequency error factor,
Then continuously transmit first of value from next group from the beginning of, or
4. when system arrange across sub-frame chan-nel estimate number of sub frames X time, if EDPCCH time
Carve n to send, transmit PDSCH/PUSCH at moment n+k, then k is by continuously transmitting value certainly
Fixed to ensure to have integer the subframe of X or X to be transmitted in the subframe continuously transmitting value.
By above setting, the continuous subframes in subband can be implemented channel by making base station
Assessment.
In a specific embodiment, at interval of cycle regular time, data are transmitted
Unit 212 can be the quality report of the down channel of described subband and/or the quality report of up channel
Accuse and deliver to gather in changing unit 214.
During implementing data transmission, when base station finds in certain subframe, need same
When sending downlink data for more than one user on one subband, data transmission unit 212 choosing
Select one of them to be transmitted, to prevent the generation of conflict that data transmit.
In step 116, set changing unit 214 is based on each subband in described sets of subbands
Channel quality and/or subband take situation, choose new subband to replace described sets of subbands
Subband that middle channel quality is poor and/or the subband that will be taken by non-MTC device.
Concrete, first set changing unit 214 determines that to change how many channel qualities poor
Subband and/or the subband that will be taken by non-MTC device.Then the new of respective amount is chosen
Subband is to replace the poor subband of the channel quality in original sets of subbands and/or will be by non-MTC
The subband of hold facility.In one embodiment, if needing the quantity replaced is 2, now,
Whether set changing unit 214 can deposit between the frequency band of top-quality two subbands of acknowledgement channel
At candidate's subband；There is other candidates' between the frequency band of best two subbands of channel quality
During band: choose candidate's subband between the frequency band of best two subbands of described channel quality
As a new subband, another new subband randomly selects from multiple candidate's subbands；When
When there is not candidate's subband between the frequency band of two subbands that channel quality is best: from the plurality of
Candidate's subband randomly selects described second quantity candidate's subband as described new subband.
Fig. 4 shows that the MTC according to above-mentioned example disclosed in this invention uses new subband to replace
Change the poor subband of channel quality in sets of subbands to implement the schematic diagram of frequency hopping.In this example,
Needing the quantity replacing subband is 2.As it can be seen, after the measurement of a period of time, when finding son
Channel quality with 1 and 6 is poor or will be taken by non-MTC device, the letter of subband 3,5
Road quality is preferable, and there is candidate's subband 4 between subband 3,5.Then select between subband 3,5
Subband 4 is new subband, and randomly chooses subband 2 as new subband.Then with subband 2,
4 replace the subband 1,6 in former sets of subbands.
Set changing unit 214 can send the sets of subbands after updating to data transmission unit
212, and implement step 106 whether to exist in confirming community needs transmit data and implement frequency hopping
MTC device.When existence needs transmit data and implement the MTC device of frequency hopping, again
Implement step 108 to 114.
It is pointed out that in the above-mentioned methods, the frequency hopping sets of subbands of different channels can be divided
It is not set to different set.These set can map each other, or the jumping of wherein certain channel
Frequently sets of subbands is the subset of frequency hopping sets of subbands of one other channel, or wherein certain channel
Frequency hopping sets of subbands can be obtained by the skew of the frequency hopping sets of subbands of one other channel.
Corresponding, we combine Fig. 5 and Fig. 6 and introduce disclosed in this invention in MTC device
The method of the data transmission implemented and device thereof.
As shown in Figure 6, the device 600 implementing data transmission in MTC device includes: transmission
Unit 602, sequentially confirmation unit 604, frequency hopping unit 606.
In step 502, transmission unit 602 be configured to from base station side receive sets of subbands,
Set side-play amount and continuously transmit value, and sets of subbands, gather side-play amount and continuously transmit value
Send to order confirmation unit 604.
In step 504, sequentially confirmation unit 604 is according to described sets of subbands and described set
Side-play amount determines the frequency hop sequence of the subband of described MTC device.Such as when sets of subbands be S1,
S2, S3} and gather side-play amount when being 2, the sets of subbands of corresponding described MTC device be S3,
S1, S2}, then the order of frequency hopping is S3, S1, S2, S3, S1, S2 ...., follow successively
Ring.Afterwards, sequentially confirmation unit 604 can send this frequency hop sequence to frequency hopping unit 606.
In step 506, frequency hopping unit 606 is according to the frequency hop sequence of described subband and described company
Continuous transmission value, controls institute at described transmission unit 602 during described base station transmission data
State transmission unit 602 and implement frequency hopping.
In step 508, transmission unit 602 and base station implement number on the subband after frequency hopping
According to transmission.
It is pointed out that transmission data during, MTC device can according to a preconcerted arrangement or
The instruction of base station, is switched to the subband of non-sets of subbands to receive system message and possible same
Time receive data.And after completing this system message and receiving, original automatically into defined
The subband of frequency hopping set proceed to receive.
Fig. 7 shows the test result figure of prior art and the weak change of channel of the present invention.Its
Middle dotted line is the weak change curve of channel using the method for the present invention to be obtained.From figure permissible
Find that the channel weak change curve performance of the present invention has obtained significantly carrying compared to prior art
High.
It is obvious to a person skilled in the art that the invention is not restricted to above-mentioned one exemplary embodiment
Details, and without departing from the spirit or essential characteristics of the present invention, it is possible to it
His concrete form realizes the present invention.Therefore, in any case from the point of view of, embodiment all should be regarded as
It is exemplary, and is nonrestrictive.Additionally, it will be evident that " an including " word is not excluded for
Other elements and step, and wording " one " is not excluded for plural number.Device claim is stated
Multiple elements can also be realized by an element.The first, the second word such as grade is used for representing name
Claim, and be not offered as any specific order.
Claims (16)
1. the method assisting MTC device enforcement data transmission in base station end, wherein,
Including step:
A. according to the receptivity of MTC device, MTC available band is divided, with really
Fixed multiple candidate's subbands；
B. from the plurality of candidate's subband, the first quantity subband is chosen, to form described MTC
The sets of subbands of equipment；
C. whether there is the MTC device needing to implement frequency hopping in determining community, when it is present；
C1. the MTC device implementing frequency hopping is needed to distribute a set side-play amount for each；
C2. according to coverage enhancement rank and the demand of channel measurement, implement to jump for each needs
The MTC device of frequency determines that continuously transmits a value；
C3. described sets of subbands, described set side-play amount and the described value that continuously transmits are sent
To corresponding MTC device；
C4. on each self-corresponding subband, data are implemented with the MTC device in described community
Transmission；
C5. take based on channel quality and/or the subband of each subband in described sets of subbands
Situation, chooses new subband to replace the subband that in described sets of subbands, channel quality is poor
And/or the subband that will be taken by non-MTC device, implement step C.
Method the most according to claim 1, wherein, each height in described sets of subbands
Band is arranged by frequency band size order, or by pseudo-random sequence arrangement.
Method the most according to claim 1, wherein, described set side-play amount makes described
When needing the same portion that the MTC device implementing frequency hopping will not use an identical subband simultaneously
Frequently resource.
Method the most according to claim 3, wherein, in step C1, described set
Side-play amount is that the mark according to MTC device determines.
Method the most according to claim 1, wherein, the MTC device in described community
The initial time of first time frequency hopping align.
Method the most according to claim 5, wherein, in step C2, described needs
Implementing the MTC device of frequency hopping uses one identical to continuously transmit value.
Method the most according to claim 5, wherein, in step C2,
Described need implement frequency hopping MTC device use respectively first continuously transmit value Y1 or
Second continuously transmits value Y2, and wherein, Y2=n × (Y1+1)-1, n is natural number.
Method the most according to claim 1, wherein, in step C3,
Described base station MTC device in described community by the way of broadcast sends described son
Band set；
Described base station is sent out to the MTC device of described correspondence by RRC signaling or DCI signaling
Send described set side-play amount and described continuously transmit value.
Method the most according to claim 1, wherein, specifically includes step in step C5
Rapid:
C51. the channel quality of each subband in described sets of subbands and/or taking of subband are confirmed
Situation；
C52. in the plurality of candidate's subband, choose the subband that the second quantity is new；
C53. channel quality in described sets of subbands is replaced with the subband that described second quantity is new
Poor subband and/or the subband that will be taken by non-MTC device, and update described sets of subbands.
Method the most according to claim 9 is wherein, concrete in described C51 step
Including:
According to the measurement result of the down channel quality that MTC device sends, confirm described subband
The channel quality of each subband in set；Or
According to the reference signal of the PUSCH that described base station receives, confirm described sets of subbands
In the channel quality of each subband.
11. methods according to claim 10, wherein, when described base station is according to MTC
The measurement result of the down channel quality that equipment sends, confirms each subband in described sets of subbands
Channel quality time:
Base station to repeat transmission number of times, original position, across sub-frame chan-nel estimate number make
Limit, so that base station can confirm the channel quality of subband by assessment continuous print subframe.
12. methods according to claim 9 are wherein, concrete in described C52 step
Including:
Candidate's subband whether is there is between the frequency band of top-quality two subbands of acknowledgement channel；
-when it is present: choose between the frequency band of best two subbands of described channel quality
One candidate's subband is as a new subband in the individual new subband of described second quantity；
-in the presence of not: from the plurality of candidate's subband, randomly select described second quantity
Individual candidate's subband is as described new subband.
13. 1 kinds of methods implementing data transmission in MTC device end, wherein, including step
Rapid:
I. receive sets of subbands from base station side, gather side-play amount and continuously transmit value；
II. the son of described MTC device is determined according to described sets of subbands and described set side-play amount
The frequency hop sequence of band；
III. according to the frequency hop sequence of described subband with described continuously transmit value, sending out to described base station
Frequency hopping is implemented during sending data.
14. methods according to claim 13, wherein, further comprise the steps of:
Measure the transmission quality of down channel in each subband, and measure to described base station feedback
Result.
15. 1 kinds assist the device that MTC device implements data transmission in base station end, and it is special
Levy and be, including:
Sub-band division unit, it is configured to the receptivity according to MTC device, to MTC
Available band divides, to determine multiple candidate's subband；
Set setup unit, it is configured to choose the first quantity from the plurality of candidate's subband
Individual subband, to form the sets of subbands of described MTC device；
Confirmation unit, whether it exists the MTC needing to implement frequency hopping in being configured to determine that community
Equipment；
Side-play amount allocation unit, it is configured to as each MTC device needing to implement frequency hopping
Distribute a set side-play amount；
Continuously transmitting value cell, it is configured to the need according to coverage enhancement rank and channel measurement
Want, determine that continuously transmits a value for each MTC device needing to implement frequency hopping；
Data transmission unit, its be configured to described sets of subbands, described set side-play amount and
The described value that continuously transmits sends to corresponding MTC device；And with in described community
MTC device implements data transmission on each self-corresponding subband；
Set changing unit, it is configured to based on the channel of each subband in described sets of subbands
Quality and/or subband take situation, choose new subband to replace channel matter in described sets of subbands
Measure poor subband and/or the subband that will be taken by non-MTC device.
16. 1 kinds of devices implementing data transmission in MTC device end, it is characterised in that bag
Include:
Transmission unit, it is configured to receive sets of subbands, set side-play amount and company from base station side
Continuous transmission value, and be configured to implement data transmission with base station；
Sequentially confirmation unit, it is configured to according to described sets of subbands and described set side-play amount
Determine the frequency hop sequence of the subband of described MTC device；
Frequency hopping unit, it is configured to the frequency hop sequence according to described subband and described continuously transmits
Value, controls described transmission unit at described transmission unit during described base station transmission data
Implement frequency hopping.
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