CN106304343B - 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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- CN106304343B CN106304343B CN201510250756.6A CN201510250756A CN106304343B CN 106304343 B CN106304343 B CN 106304343B CN 201510250756 A CN201510250756 A CN 201510250756A CN 106304343 B CN106304343 B CN 106304343B
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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 to assist MTC device to implement the method and device thereof and a kind of method and device thereof for implementing data transmission in MTC device that data are transmitted in base station end.MTC device is assisted to implement the method for data transmission in base station end comprising steps of A. divides MTC available band, with the multiple candidate subbands of determination；B. the sets of subbands of MTC device is formed；C. the MTC device for needing to implement frequency hopping is determined whether there is, when it is present；C1. a set offset is distributed for each MTC device for needing to implement frequency hopping；C2. determine that continuously transmits a value for each MTC device for needing to implement frequency hopping；C3. the sets of subbands, the set offset and the value that continuously transmits are sent in corresponding MTC device；C4. implement data transmission with MTC device；C5. channel quality and/or subband occupancy situation based on each subband in the sets of subbands choose new subband to replace the subband and/or the subband that will be occupied by non-MTC device that channel quality is poor in the sets of subbands.
Description
Technical field
The present invention relates to wireless communication fields, in particular it relates to which one kind assists MTC device to implement in base station end
The method and device thereof of data transmission and a kind of method and device thereof for implementing data transmission in MTC device.
Background technique
In Rel-13, MTC (machine type communication) work item has been reached an agreement, and needs to be further reduced MTC device use
The complexity at family end.In order to increase the coverage strength of MTC device user terminal and improve power loss.Inexpensive MTC user terminal can
To be equipped with a lower power amplifier, the loss of covering performance will cause, so needing to enhance the signal of about 18dB
Coverage strength.Most effective coverage enhancement technology is to retransmit (repetition).For the enhancing of 18dB covering, need to implement to surpass
Cross 300 repeating transmission.This dramatically reduces the efficiency of frequency spectrum.Reducing and retransmitting most important method is frequency hopping.This is in Ran1#
Frequency hopping can be supported by being discussed and having passed through in 80bis.However concrete scheme is uncertain.Because frequency hopping is important MTC
With it is compulsory, so solving the problems, such as this by defining hopping scheme for low cost MTC in the present invention.
Two kinds of frequency hopping, type -1 and type -2 are defined in LTE for PUSCH.- 2 performance of type is more preferable.Class
The basic principle of type -2 is entire frequency range to be divided into 2 or 4 frequency sub-band, and select one based on prime sequence (pseudo-random sequence)
A frequency sub-band implements frequency hopping.
Since the bandwidth of the MTC device of low cost is narrow, so in a subframe of the MTC device of low cost only
6 Physical Resource Block (PRB) can be received, and it needs the time of a subframe to reset to next different sub-band
On, compared to normal UE equipment (MTC device of non-low cost), which causes the frequency hopping of MTC device to have different timing, and
And this may cause the collision conflict in transmission.Secondly, in order to enhance signal coverage strength, inexpensive MTC device may need
Hundreds of repeating transmission, and frequency hopping is usually needed in order to retransmit identical data, and normal UE can be any in transmission process
Timing receives scheduling information, so normal UE equipment is more flexible.In 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-bands, the scheme of existing 4 frequency hopping sub-bands
Seem not careful enough for MTC device, enough diversity are not provided.Therefore, existing PUSCH hopping scheme is uncomfortable
Close inexpensive MTC device.
Summary of the invention
In order to achieve the object of the present invention, the first aspect of the present invention provides one kind and assists MTC device in base station end
Implement the method for data transmission, wherein comprising steps of receptivity of the A. according to MTC device, draws MTC available band
Point, with the multiple candidate subbands of determination；B. the first quantity subband is chosen from the multiple candidate subband, to form the MTC
The sets of subbands of equipment；C. it determines with the presence or absence of the MTC device for needing to implement frequency hopping in cell, when it is present；It C1. is each need
The MTC device for implementing frequency hopping distributes a set offset；C2. according to the demand of coverage enhancement rank and channel measurement, it is
Each MTC device for needing to implement frequency hopping determines that continuously transmits a value；C3. the sets of subbands, the set offset
It is sent in corresponding MTC device with the value that continuously transmits；C4. with the MTC device in the cell in corresponding son
It takes and implements data transmission；C5. channel quality and/or subband occupancy situation based on each subband in the sets of subbands, choosing
New subband is taken to replace the subband and/or the subband that will be occupied by non-MTC device that channel quality is poor in the sets of subbands,
Implementation steps C.
Particularly, each subband in the sets of subbands is to arrange by frequency band size order, or press pseudorandom
Series arrangement.
Particularly, the set offset makes the MTC device for needing to implement frequency hopping not use a phase simultaneously
Same a running time-frequency resource of same subband.
Particularly, in step C1, the set offset is determined according to the mark of MTC device.
Particularly, the initial time of the first time frequency hopping of the MTC device in the cell aligns.
Particularly, in step C2, the MTC device for needing to implement frequency hopping identical continuously transmits value using one.
Particularly, in step C2, the MTC device for needing to implement frequency hopping respectively using first continuously transmit value Y1 or
Second continuously transmits value Y2, wherein Y2=n × (Y1+1) -1, n is natural number.
Particularly, in step C3, described in MTC device transmission of the base station by way of broadcast into the cell
Sets of subbands；The base station by RRC signaling or DCI signaling to the corresponding MTC device send the set offset with
It is described to continuously transmit value.
Particularly, specifically include step in step C5: C51. confirms the channel matter of each subband in the sets of subbands
The occupancy situation of amount and/or subband；C52. the new subband of the second quantity is chosen in the multiple candidate subband；C53. institute is used
It states the new subband of the second quantity and replaces the subband and/or will be accounted for by non-MTC device that channel quality is poor in the sets of subbands
Subband, and update the sets of subbands.
Particularly, it is specifically included in the C51 step: according to the measurement knot for the down channel quality that MTC device is sent
Fruit confirms the channel quality of each subband in the sets of subbands；Or the reference of the PUSCH received according to the base station is believed
Number, confirm the channel quality of each subband in the sets of subbands.
Particularly, the measurement result of the down channel quality sent when the base station according to MTC device confirms the subband
In set when the channel quality of each subband: base station to repeat transmission number, initial position, cross-subframe channel estimation number
Restriction is made, so that base station can confirm the channel quality of subband by assessing continuous subframe.
Particularly, it is specifically included in the C52 step: being between the frequency band of top-quality two subbands of acknowledgement channel
It is no to there is candidate subband；When it is present: a candidate son is chosen between the frequency band of two subbands best from the channel quality
With a new subband in the subband new as second quantity；When it be not present: from the multiple candidate subband
The candidate subband of second quantity is randomly selected as the new subband.
The second aspect of the present invention provides a kind of method for implementing data transmission in MTC device end, wherein including step
Rapid: I. receives sets of subbands, set offset from base station side and continuously transmits value；II. according to the sets of subbands and the collection
Close the frequency hop sequence that offset determines the subband of the MTC device；III. according to the frequency hop sequence of the subband and described continuous
Transmission value implements frequency hopping during sending data to the base station.
Particularly, the transmission quality for measuring the down channel in each subband is further comprised the steps of:, and to the base station feedback
Measurement result.
The third aspect of the present invention provides a kind of device for assisting MTC device to implement data transmission in base station end,
It is characterized in that, comprising: sub-band division unit is configured as the receptivity according to MTC device, carries out to MTC available band
It divides, with the multiple candidate subbands of determination；Gather setup unit, is configured as choosing the first number from the multiple candidate subband
A subband is measured, to form the sets of subbands of the MTC device；Confirmation unit, being configured to determine that, which whether there is in cell, needs
Implement the MTC device of frequency hopping；Offset allocation unit is configured as each MTC device distribution for needing to implement frequency hopping
One set offset；Value cell is continuously transmitted, the needs according to coverage enhancement rank and channel measurement is configured as, is every
A MTC device for needing to implement frequency hopping determines that continuously transmits a value；Data transmission unit is configured as the subband set
It closes, the set offset and the value that continuously transmits are sent in corresponding MTC device；And with the MTC in the cell
Equipment implements data transmission on corresponding subband；Gather changing unit, is configured as based in the sets of subbands
The channel quality and/or subband occupancy situation of each subband choose new subband to replace channel quality in the sets of subbands
Poor subband and/or the subband that will be occupied by non-MTC device.
The fourth aspect of the present invention provides a kind of device for implementing data transmission in MTC device end, it is characterised in that
Include: transmission unit, is configured as receiving sets of subbands, set offset from base station side and continuously transmits value, and matched
It is set to and implements data transmission with base station；Sequence confirmation unit is configured as being deviated according to the sets of subbands and the set
Amount determines the frequency hop sequence of the subband of the MTC device；Frequency hopping unit, be configured as according to the frequency hop sequence of the subband and
It is described to continuously transmit value, the transmission unit, which is controlled, during the transmission unit and base station transmission data implements to jump
Frequently.
The method disclosed in the present and device carry out data transmission especially suitable for the MTC of low cost, not only increase
The coverage enhancement performance of MTC device avoids the data collision in data transmission procedure, and can adjust the son in sets of subbands
Band, improve data transfer efficiency.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows a kind of side for assisting MTC device to implement data transmission in base station end disclosed according to the present invention
The flow chart of method；
Fig. 2 shows a kind of dresses for assisting MTC device to implement data transmission in base station end disclosed according to the present invention
The module map set；
Fig. 3 shows the frequency hopping signal of two MTC devices that there is difference to continuously transmit value disclosed according to the present invention
Figure；
It is poor using channel quality in new subband replacement sets of subbands that Fig. 4 shows MTC disclosed according to the present invention
Subband implement the schematic diagram of frequency hopping；
Fig. 5 shows a kind of flow chart of method for implementing data transmission in MTC device disclosed according to the present invention；
Fig. 6 shows a kind of module map of device for implementing data transmission in MTC device disclosed according to the present invention；
And
Fig. 7 shows prior art figure compared with the test result of the weak variation of channel of the invention.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of present invention a part.Institute
Attached attached drawing, which has been illustrated by way of example, can be realized specific embodiment.Exemplary embodiment is not intended to
Exhaustive all embodiments according to the present invention.It is appreciated that without departing from the scope of the present invention, can use other
Embodiment can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and this
The range of invention is defined by the claims appended hereto.In addition, although the step of method is described in specification in a particular order
Suddenly, but this does not require that or implies must execute these operations in this particular order, or have to carry out whole institutes
The operation shown just is able to achieve desired as a result, on the contrary, the step of describing can change and execute sequence.Additionally or alternatively, may be used
To omit certain steps, multiple steps are merged into a step and are executed, and/or a step is decomposed into multiple steps and is held
Row.
For ease of description, in the present invention, subband is called for short by the sub-band that entire available band marks off.
Firstly, we combine Fig. 1 and Fig. 2 to introduce the auxiliary MTC device reality disclosed in this invention implemented in base station end
Apply the method and device thereof of data transmission.The auxiliary MTC device implemented in base station end as shown in Figure 2 implements data transmission
Device 200 includes: sub-band division unit 202, set setup unit 204, confirmation unit 206, offset allocation unit 208, connects
Resume defeated value cell 210, data transmission unit 212, set changing unit 214.
In a step 102, sub-band division unit 202 draws MTC available band according to the receptivity of MTC device
Point, with the multiple candidate subbands of determination.
Specifically, sub-band division unit 202 can receive the maximum quantity of Physical Resource Block to entire according to MTC device
The system bandwidth of MTC device is implemented to divide.For example, if MTC device can only receive 6 PRBs, for 20MHz's
Bandwidth can be divided into 17 subbands.Wherein each subband is a candidate subband.Acquisition candidate subband it
Afterwards, these candidate subbands are sent to set setup unit 204 by sub-band division unit 202, therefrom to select suitable subband group
At the sets of subbands for MTC frequency hopping.
At step 104, set setup unit 204 chooses the first quantity subband from above-mentioned multiple candidate subbands, with
Form the sets of subbands of MTC device.
For frequency hopping, it is preferred to use enough frequency hopping subbands, with smoothed channel variable.But inexpensive MTC is set
Standby, each frequency hopping requires the readjustment time an of sub-frame frequency, and in order to which the estimation of sub-band channel needs are identical at one
Multiple subframes are continuously transmitted in subband, therefore excessive frequency hopping subband will increase the complexity of system.In the present invention by
Implement frequency hopping on the sub-band of limited number, to prevent too many sub-band to be used for while increasing the variation of enough subbands
Frequency hopping, to increase system complexity and reduce a possibility that clashing with normal users end.
Specifically, collective's setup unit 204 is by weighing system complexity and the requirement smooth to channel variable,
To determine the quantity N of subband in the sets of subbands for MTC frequency hopping.The sets of subbands refers to that MTC device can be used for the son of frequency hopping
The set of band.For example, in the examples described above, when MTC device is confirmed as needing to implement frequency hopping in 6 subbands, collective is set
6 subbands are selected in 17 candidate subbands that order member 204 can receive from it, and generate sets of subbands.It may be noted that
Be, collective's setup unit 204 when selecting subband can in conjunction with candidate subband service condition come decide whether selection should
Candidate subband is as the element in the sets of subbands for being used for MTC frequency hopping, when candidate's subband is set by the MTC of other non-low costs
Standby to occupy, then candidate's subband will be not selected as the element in sets of subbands, with the collision and conflict for preventing data from transmitting.
In a specific embodiment, the element in the sets of subbands, i.e. subband are the frequency band size orders by subband
It is arranged successively, such as sets of subbands is { S1, S2, S3 }, then the frequency band of S1 is greater than the frequency band of S2, then the frequency band of S2 is greater than S3's
Frequency band, vice versa.In another specific embodiment, element in the sets of subbands, i.e. subband, be by prime sequence,
That is: pseudo-random sequence, arrangement.
After having set sets of subbands, which is sent to data transmission unit by collective's setup unit 204
212, in case being sent to MTC device.
In step 106, confirmation unit 206, which determines, whether there is the MTC for needing to transmit data and implementing frequency hopping in cell
Equipment: when, there is no when needing to transmit data and implementing the MTC device of frequency hopping, confirmation unit 206 can be one section at interval in cell
It is reaffirmed after time；When existing in cell, when needing to transmit data and implementing the MTC device of frequency hopping, confirmation unit 206 can lead to
Know offset allocation unit 208 and continuously transmits value cell 210.
In step 108, offset allocation unit 208 is that each MTC device for needing to implement frequency hopping distributes a set
Offset, and the set offset after the distribution is sent to data transmission unit 212.
If the MTC device in cell carries out frequency hopping all in accordance with putting in order for subband in sets of subbands, number can occur
According to transmission collision.For this purpose, using the MTC device of same sub-band set when implementing frequency hopping, used in subband should be mutually wrong
It opens.In the present invention, the effect for gathering offset is exactly: so that the MTC device for needing to implement frequency hopping will not use one simultaneously
Same a running time-frequency resource of identical subband.
For example, to implement frequency hopping when transmitting data there are three MTC device M1, M2, M3 in cell, they share a son
Band set { S1, S2, S3 } do not deviated then the set offset of M1 can be set to 0, still with original sets of subbands S1,
S2, S3 }；The set offset of M2 can be set to 1, i.e. element in sets of subbands deviates 1 to the left, thus become S2, S3,
S1}；The set offset of M3 can be set to 2, i.e. element in sets of subbands deviates 2 to the left, to become { S3, S1, S2 }.
In this way, three MTC devices would not when implementing frequency hopping according to the sub-band sequence in the sets of subbands after respective offset
It clashes.
In a specific embodiment, offset allocation unit 208 is each MTC device distribution for needing to implement frequency hopping
Set offset be to be sequentially allocated according to the size of the mark (ID number) of MTC, it may be assumed that first (ID minimum/big) MTC is set
Standby set offset is 0, second (ID times small/big) it is 1, and so on, until the value of set offset is subband set
Number of elements subtracts 1 in conjunction.For example, there are 5 elements in sets of subbands, then gathers offset and be up to 4.For being not assigned to collection
The MTC device for closing offset will cannot implement frequency hopping on the subband in the sets of subbands.
In another specific embodiment, offset allocation unit 208 is each MTC device for needing to implement frequency hopping point
The set offset matched is distributed according to the operation result of the mould of the mark (ID number) of MTC.For example, if in sets of subbands
The quantity of element is 4, then calculate: ID Mod 4, result are the set offset of each MTC device.If there is more
The identical situation of set offset of a MTC device, then only ID minimum or maximum MTC device are assigned set offset
Amount.Such as ID be 13 MTC device and ID be 9 the set offset of MTC device be all 1, only one can be among them
Obtain the set offset.
In step 110, value cell 210 is continuously transmitted according to the needs of coverage enhancement rank and channel measurement, is each
The MTC device for needing to implement frequency hopping determines that continuously transmits a value Y.
It continuously transmits value Y to refer to before each frequency hopping, the number of the continuous subframe of required transmission in a subband
Amount.Since the quantity of the subframe continuously transmitted in a subband will affect coverage enhancement, and must have in a subband
Sufficient amount of continuous subframe just can guarantee the correct progress of channel quality measurement by transmission.It therefore must be special in a subband
The continuous subframe of fixed number amount is transmitted, and the quantity should be by unification as far as possible.
In a specific embodiment, continuously transmitting value cell 210 is that each MTC device for needing to implement frequency hopping determines
It is identical to continuously transmit value, that is, each MTC is in the company that must transmit identical quantity before a subband hopping to another subband
Continuous subframe.
In another specific embodiment, continuously transmitting value is two kinds, it may be assumed that Y1, Y2 continuously transmit value cell 210
According to the needs of coverage enhancement rank and channel measurement, determine that one of is the continuous of each MTC device for needing to implement frequency hopping
Transmission value.Wherein both transmission values have following mathematical relationship Y2=n × (Y1+1) -1.Wherein n is natural number.So setting
It is in order to enable the MTC device that there is difference to continuously transmit value can be aligned in frequency hopping switching, to be conducive to frequency resource
Reasonable utilization.
It should be pointed out that in the above two embodiments, the first time of each MTC device or at least once frequency hopping
Initial time is alignment.Fig. 3 shows the frequency hopping schematic diagram that two MTC devices of value are continuously transmitted with difference, wherein uses
The value that continuously transmits at family 1 is Y1=4, and the value that continuously transmits of user 2 is Y2=9, n=2, the reality after 4 subframes of every transmission of user 1
Frequency hopping is applied, user 2 implements frequency hopping after 9 subframes of every transmission.From figure it can be found that due to having difference to continuously transmit value
First time of the two MTC user equipmenies or initial time of frequency hopping aligns at least once, therefore they can be in certain jump
It may be implemented when frequency while frequency hopping, so as to mutually skip to other side currently in occupied subband.To improve frequency band money
The utilization rate in source.
After distributing and continuously transmitting value, continuously transmits value cell 210 and the value Y that continuously transmits of each MTC device is passed
It transports in data transmission unit 212.
In step 112, data transmission unit 212 received by it sets of subbands, set offset and continuous pass
Defeated value is sent in corresponding MTC device.
Specifically, data transmission unit 212 can be described in MTC device by way of from broadcast to the cell sends
Sets of subbands, and set offset can be sent to corresponding MTC device by RRC signaling or DCI signaling and continuously transmitted
Value.
In step 114, data transmission unit 212 and each MTC device implement data transmission.
In a specific embodiment, data transmission unit 212 is received as measured by each MTC device from MTC device
Each subband down channel quality report.
In another specific embodiment, the uplink signal-channel quality measurement module in data transmission unit 212 (does not show in figure
The reference signal of the PUSCH received can be analyzed out) to confirm when data transmission unit 212 implements data transmission
The uplink signal-channel quality of each subband, and generate the quality report of corresponding up channel.
In order to enable the measurement of the channel quality to each subband can be implemented in base station, base station can be set as follows
Set cross-subframe channel estimation:
1. the number of the not specified specific cross-subframe channel estimation in base station, and the cross-subframe channel for only limiting maximum possible is estimated
The number of meter, the number of specific cross-subframe channel estimation is by UE according to the son for continuously transmitting value and continuously transmitting in particular sub-band
Frame number is decided in its sole discretion, or
2. the number for the repetition transmission implemented to enhance covering is the integral multiple or half for continuously transmitting value, and again
Multiple transmission always continuously transmits first of subframe since frequency hopping template corresponding to a certain subband, cut if carrying out frequency
It changes, the number of cross-subframe channel estimation subtracts one automatically, or
3. the transmission of each channel starting or re-transmission subframe continuously transmit son corresponding to a certain subband from frequency hopping template
First of frame beginning, if first occupied or be used for frequency error factor, first that value is continuously transmitted from next group is opened
Begin, or
4. when the number of sub frames X of cross-subframe channel estimation is arranged in system, if EDPCCH is sent in moment n, in moment n+k
PDSCH/PUSCH is transmitted, then k is determined by continuously transmitting value to guarantee the integer for having X or X in the subframe for continuously transmitting value
A subframe is transmitted.
By above setting, base station will be allowed to implement channel estimating to the continuous subframes in subband.
In a specific embodiment, at interval of period regular time, data transmission unit 212 can be described
The quality report of the down channel of subband and/or the quality report of up channel are sent in set changing unit 214.
During implementing data transmission, when base station discovery in some subframe, need to be more on the same subband
When a user sends downlink data, data transmission unit 212 select one of them to be sent, to prevent data from transmitting
Conflict generation.
In step 116, channel quality of the set changing unit 214 based on each subband in the sets of subbands and/or
The occupancy situation of subband chooses new subband to replace channel quality is poor in the sets of subbands subband and/or will be non-
The subband that MTC device occupies.
Specifically, the determination first of set changing unit 214 will replace the poor subband of how many a channel qualities and/or will be by
The subband that non-MTC device occupies.Then the new subband of corresponding number is chosen to replace the channel quality in original sets of subbands
Poor subband and/or the subband that will be occupied by non-MTC device.It in one embodiment, is 2 if necessary to the quantity of replacement,
At this point, set changing unit 214 can whether there is candidate subband between the frequency band of top-quality two subbands of acknowledgement channel；When
There are when other candidate subbands between the frequency band of two best subbands of channel quality: two sons best from the channel quality
Choose a candidate subband subband new as one between the frequency band of band, another new subband from multiple candidate subbands with
Machine is chosen；When there is no when candidate subband between the frequency band of two best subbands of channel quality: from the multiple candidate subband
In randomly select the candidate subband of second quantity as the new subband.
The MTC that Fig. 4 shows above-mentioned example disclosed according to the present invention is replaced in sets of subbands using new subband to be believed
The second-rate subband in road implements the schematic diagram of frequency hopping.In this example, the quantity for needing to replace subband is 2.As shown,
After the measurement of a period of time, when the channel quality of discovery subband 1 and 6 is poor or will be occupied by non-MTC device, subband 3,5
Channel quality it is preferable, and there is candidate subband 4 between subband 3,5.Then select subband 4 for new subband between subband 3,5, and
Subband 2 is randomly choosed as new subband.Then the subband 1,6 in former sets of subbands is replaced with subband 2,4.
Updated sets of subbands can be sent to data transmission unit 212, and implementation steps by set changing unit 214
106 whether there is the MTC device for needing to transmit data and implementing frequency hopping to confirm in cell.Need to transmit data and real when existing
When applying the MTC device of frequency hopping, step 108 is again carried out to 114.
It should be pointed out that in the above-mentioned methods, the frequency hopping sets of subbands of different channels can be respectively set to different
Set.These set can map each other or in which the frequency hopping sets of subbands of some channel is the frequency hopping subband of one other channel
The subset of set or in which the frequency hopping sets of subbands of some channel can deviating by the frequency hopping sets of subbands of one other channel
It arrives.
Corresponding, we combine Fig. 5 and Fig. 6 to introduce the data transmission disclosed in this invention implemented in MTC device
Method and device thereof.
As shown in fig. 6, the device 600 for implementing data transmission in MTC device includes: transmission unit 602, sequence confirmation form
First 604, frequency hopping unit 606.
In step 502, transmission unit 602 is configured as receiving sets of subbands, set offset and continuous from base station side
Transmission value, and sets of subbands, gather offset and continuously transmit value and be sent to sequence confirmation unit 604.
In step 504, sequence confirmation unit 604 is according to the sets of subbands and set offset determination
The frequency hop sequence of the subband of MTC device.Such as when sets of subbands is { S1, S2, S3 } and to gather offset be 2, corresponding institute
The sets of subbands for stating MTC device is { S3, S1, S2 }, then the sequence of frequency hopping is S3, S1, S2, S3, S1, S2 ... are successively followed
Ring.Later, sequence confirmation unit 604 can be sent to the frequency hop sequence in frequency hopping unit 606.
In step 506, frequency hopping unit 606 according to the frequency hop sequence of the subband and it is described continuously transmit value, described
The transmission unit 602, which is controlled, during transmission unit 602 and base station transmission data implements frequency hopping.
In step 508, data transmission is implemented in transmission unit 602 and base station on the subband after frequency hopping.
It should be pointed out that MTC device can be according to the instruction of agreement or base station, switching during transmitting data
To the subband of non-sets of subbands to receive system message, and data may be received simultaneously.And it is received completing the system message
Later, continue to receive automatically into the subband of the original frequency hopping set of defined.
Fig. 7 shows the test result figure of the prior art Yu the weak variation of channel of the invention.Wherein dotted line is to use this
The weak change curve of the method for invention channel obtained.It can be found that the weak change curve performance of channel of the invention from figure
It is significantly improved compared to the prior art.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
How from the point of view of, the present embodiments are to be considered as illustrative and not restrictive.In addition, it will be evident that one word of " comprising " not
Exclude other elements and steps, and wording "one" be not excluded for plural number.The multiple element stated in device claim can also
To be implemented by one element.The first, the second equal words are used to indicate names, and are not indicated any particular order.
Claims (16)
1. a kind of method for assisting MTC device to implement data transmission in base station end, wherein comprising steps of
A. according to the receptivity of MTC device, MTC available band is divided, with the multiple candidate subbands of determination；
B. the first quantity subband is chosen from the multiple candidate subband, to form the sets of subbands of the MTC device；
C. it determines with the presence or absence of the MTC device for needing to implement frequency hopping in cell, when it is present；
C1. a set offset is distributed for each MTC device for needing to implement frequency hopping；
C2. according to the demand of coverage enhancement rank and channel measurement, a company is determined for each MTC device for needing to implement frequency hopping
Continuous transmission value；
C3. the sets of subbands, the set offset and the value that continuously transmits are sent in corresponding MTC device；
C4. implement data transmission on corresponding subband with the MTC device in the cell；
C5. channel quality and/or subband occupancy situation based on each subband in the sets of subbands, choose new subband to replace
Change the subband and/or the subband that will be occupied by non-MTC device that channel quality is poor in the sets of subbands, implementation steps C.
2. according to the method described in claim 1, wherein, each subband in the sets of subbands is arranged by frequency band size order
Column, or by pseudo-random sequence arrangement.
3. according to the method described in claim 1, wherein, the set offset sets the MTC for needing to implement frequency hopping
The standby same a running time-frequency resource that will not use an identical subband simultaneously.
4. according to the method described in claim 3, wherein, in step C1, the set offset is the mark according to MTC device
Know to determine.
5. according to the method described in claim 1, wherein, the initial time of the first time frequency hopping of the MTC device in the cell
It aligns.
6. according to the method described in claim 5, wherein, in step C2, the MTC device for needing to implement frequency hopping uses one
It is a identical to continuously transmit value.
7. according to the method described in claim 5, wherein, in step C2,
The MTC device for needing to implement frequency hopping continuously transmits value Y1 or second using first respectively and continuously transmits value Y2, wherein
Y2=n × (Y1+1) -1, n is natural number.
8. according to the method described in claim 1, wherein, in step C3,
MTC device of the base station by way of broadcast into the cell sends the sets of subbands；
The base station sends the set offset and the company to the corresponding MTC device by RRC signaling or DCI signaling
Continuous transmission value.
9. according to the method described in claim 1, wherein, specifically including step in step C5:
C51. confirm the occupancy situation of the channel quality of each subband and/or subband in the sets of subbands；
C52. the new subband of the second quantity is chosen in the multiple candidate subband；
C53. channel quality is poor in the sets of subbands subband is replaced with second quantity new subband and/or will be by
The subband that non-MTC device occupies, and update the sets of subbands.
10. according to the method described in claim 9, wherein, being specifically included in the C51 step:
According to the measurement result for the down channel quality that MTC device is sent, the channel of each subband in the sets of subbands is confirmed
Quality；Or
According to the reference signal for the PUSCH that the base station receives, the channel quality of each subband in the sets of subbands is confirmed.
11. according to the method described in claim 10, wherein, when the down channel quality that the base station is sent according to MTC device
Measurement result, when confirming the channel quality of each subband in the sets of subbands:
Restriction is made to the number of the number of repetition transmission, initial position, cross-subframe channel estimation in base station, so that base station can
The channel quality of subband is confirmed by assessing continuous subframe.
12. according to the method described in claim 9, wherein, being specifically included in the C52 step:
With the presence or absence of candidate subband between the frequency band of top-quality two subbands of acknowledgement channel；
When it is present: being chosen between the frequency band of two subbands best from the channel quality described in a candidate subband conduct
A new subband in the new subband of second quantity；
When it be not present: the candidate subband of second quantity is randomly selected from the multiple candidate subband as described new
Subband.
13. a kind of method for implementing data transmission in MTC device end, wherein comprising steps of
I. sets of subbands, set offset are received from base station side and continuously transmits value；
II. the frequency hop sequence of the subband of the MTC device is determined according to the sets of subbands and the set offset；
III. according to the frequency hop sequence of the subband and it is described continuously transmit value, it is real during sending data to the base station
Apply frequency hopping.
14. according to the method for claim 13, wherein further comprise the steps of:
Measure the transmission quality of the down channel in each subband, and to the base station feedback measurement result.
15. a kind of device for assisting MTC device to implement data transmission in base station end characterized by comprising
Sub-band division unit is configured as the receptivity according to MTC device, divides to MTC available band, with determination
Multiple candidate's subbands；
Gather setup unit, is configured as choosing the first quantity subband from the multiple candidate subband, described in forming
The sets of subbands of MTC device；
Confirmation unit is configured to determine that in cell with the presence or absence of the MTC device for needing to implement frequency hopping；
Offset allocation unit is configured as distributing a set offset for each MTC device for needing to implement frequency hopping；
Value cell is continuously transmitted, the needs according to coverage enhancement rank and channel measurement are configured as, needs to implement to be each
The MTC device of frequency hopping determines that continuously transmits a value；
Data transmission unit is configured as the sets of subbands, the set offset and the value that continuously transmits to send
To in corresponding MTC device；And implement data transmission on corresponding subband with the MTC device in the cell；
Gather changing unit, is configured as channel quality and/or subband based on subband each in the sets of subbands and occupies
Situation chooses new subband to replace the subband and/or will be occupied by non-MTC device that channel quality is poor in the sets of subbands
Subband.
16. a kind of device for implementing data transmission in MTC device end, characterized by comprising:
Transmission unit is configured as receiving sets of subbands, set offset from base station side and continuously transmits value, and is configured
To implement data transmission with base station；
Sequence confirmation unit is configured as determining the MTC device according to the sets of subbands and the set offset
The frequency hop sequence of subband；
Frequency hopping unit, be configured as according to the frequency hop sequence of the subband and it is described continuously transmit value, in the transmission unit
The transmission unit is controlled during transmitting data with the base station implements frequency hopping.
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| CN109219066A (en) * | 2017-07-03 | 2019-01-15 | 中兴通讯股份有限公司 | A kind of wireless communications method, base station and user equipment |
| CN112019234B (en) * | 2019-05-29 | 2022-08-16 | 鹤壁天海电子信息系统有限公司 | Data transmission method, transmitter and receiver |
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