CN109275188A - Base station and its dynamic allocation of radio resources method for narrow frequency Internet of things system - Google Patents
Base station and its dynamic allocation of radio resources method for narrow frequency Internet of things system Download PDFInfo
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- CN109275188A CN109275188A CN201710581209.5A CN201710581209A CN109275188A CN 109275188 A CN109275188 A CN 109275188A CN 201710581209 A CN201710581209 A CN 201710581209A CN 109275188 A CN109275188 A CN 109275188A
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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
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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Abstract
A kind of base station and its dynamic allocation of radio resources method for a narrow frequency Internet of things system.Base station judges that multiple user apparatus need to participate in radio resource scheduling and distribution according to scheduling information, and according to from the received report message of each user apparatus institute, judges a received signal quality of each user apparatus.Then, base station is according to the received signal quality of each user apparatus, it executes a DCI subframe and repeatedly transmits number assessment adjustment programme, to judge that a Downlink Control Information (DCI) subframe of each user apparatus in a narrow frequency entity down control channel repeatedly transmits whether number needs to adjust, and adjusts the DCI subframe that need to be adjusted and repeatedly transmit number.After the DCI subframe repeatedly transmits number assessment adjustment programme, base station executes radio resource scheduling and distribution.
Description
Technical field
The present disclosure generally relates to for narrow frequency Internet of things system base station and its dynamic allocation of radio resources method.It is specific and
Speech, base station of the invention are directed to the user apparatus that need to participate in radio resource scheduling and distribution, according to from its received return of institute
Message assesses its Downlink Control Information (DCI) subframe in narrow frequency entity down control channel and repeatedly transmits whether number needs
Adjustment, and adjust accordingly.
Background technique
In recent years the Fast Growth of wireless communication technique is suggested various wireless communication systems successively, especially honeycomb
The wireless communication system of formula network (Cellular network) framework, to meet various communication requirements in daily life and answer
With.Narrow frequency Internet of Things (Narrowband Internet of Things；NB-IoT) system is also the channel radio being suggested in recent years
One of letter system, primarily directed to the use for having the characteristics such as low power consuming, low complex degree, low cost, high-transmission delay-tolerant degree
Family device, therefore become the wireless communication system most actively developed for Internet of things device at present.
Existing NB-IoT system, to make Downlink Control Information (Downlink Control Information；DCI)
It is able to be transmitted to the user apparatus positioned at base station signal covering scope marginal (cell edge) nearby, base station can be penetrated downlink
The mode that control information repeatedly transmits rectifies the true success rate for solving data in user apparatus to improve.
In detail, base station can enhance grade (Coverage Enhancement according to the covering scope locating for user apparatus
Level, CE Level) narrow frequency entity down control channel (the Narrowband Physical Downlink Control of configuration
Channel；NPDCCH the DCI subframe in) repeatedly transmits number.However, it is to be directed to respectively to cover model that DCI subframe, which repeatedly transmits number,
Whole user apparatus configuration in enhancing grade is enclosed, therefore enhances whole user apparatus in grade for same covering scope,
Base station can repeatedly transmit number based on same DCI subframe, to carry out radio resource scheduling and distribution.For example, cover
If range enhancing grade is divided into three grades and its corresponding DCI subframe repeatedly transmits number and is configured to 2 times, 4 times and 8 times,
Base station will enhance grade based on covering scope locating for user apparatus, distribute the subframe that corresponding DCI subframe repeatedly transmits number
To transmit Downlink Control Information to user apparatus.
However, current radio resource allocation mechanism is in the good user apparatus of base station proximal end reception, i.e.,
Just its correctly solve DCI needed for continuous subframes less than corresponding DCI subframe repeatedly transmit number (such as: DCI of configuration
It is 4 times that frame, which repeatedly transmits number, but actually only need to receive the DCI repeatedly transmitted in 2 continuous subframes can be just for user apparatus
Really solve DCI), the continuous subframes that the DCI subframe that base station still will use corresponding configuration repeatedly transmits number repeatedly transmit DCI.It changes
Yan Zhi, the base station in known techniques carry out the configuration that DCI subframe repeatedly transmits number only for covering scope enhancing grade, and
It repeats to pass without DCI subframe is carried out for individual user devices (each user apparatus of especially same covering scope enhancing grade)
Number is sent to configure.In the case, the case where being limited to the NPDCCH limited radio resources of configuration, even if narrow frequency entity downlink
Share channel (Narrowband Physical Downlink Share Channel；NPDSCH) or narrow frequency entity uplink is shared
Channel (Narrowband Physical Uplink Share Channel；NPUSCH) still there is assignable radio resource,
But because NPDCCH can distribute the DCI for transmitting other user apparatus without other radio resources, therefore base station can not will be remaining
Unappropriated NPDSCH radio resource or NPUSCH radio resources allocation give other users device.
For example, as shown in Figure 1, if the radio resource of the NPDCCH configured in each NPDCCH period is 16
Subframe repeatedly transmits the user apparatus that number is 4 times for the DCI subframe that covering scope enhancing grade is configured,
NPDCCH radio resource is only sufficient in the case where distributing to 4 user apparatus that this covering scope enhances grade, even if same
Still there is assignable radio resource in the NPDCCH period in NPDSCH, base station still can not be wireless by remaining unappropriated NPDSCH
Electric resources distribute to the 5th user apparatus, or can not be in this NPDCCH period, by corresponding NPUSCH radio resource
Distribute to the 5th user apparatus.Accordingly, current radio resource allocation mechanism is unable to reach radio resource scheduling and configuration
Optimization, to service more user apparatus under limited radio resource.
In view of this, the art needs a kind of radio resource allocation mechanism, under limited radio resource
Service more user apparatus, and then avoid the waste of radio resource, come improve the utilization rate of radio resource, system always gulps down
The amount of spitting and scheduling of resource flexibility ratio.
Summary of the invention
The purpose of the present invention is to provide a kind of dynamic allocation of radio resources mechanism, are returned based on each user apparatus
The information of report judges the received signal quality of user apparatus, is repeatedly transmitted time with dynamically adjusting the DCI subframe of each user apparatus
Number, so that the configuration that DCI subframe repeatedly transmits number is incompletely limited to covering scope enhancing grade.In this way, this hair
It is bright to repeatedly transmit number based on the DCI subframe after each user apparatus dynamically adjustment, it carries out radio resource scheduling and divides
Match, to service more user apparatus under limited radio resource, and then the waste of radio resource is avoided, to improve nothing
Utilization rate, overall system throughput and the scheduling of resource flexibility ratio of line electric resources.
In order to achieve the above object, the invention discloses one kind to be used for a narrow frequency Internet of things system (Narrowband Internet
of Thing；NB-IoT base station), it includes a reservoir, a transceiver and a processors.The reservoir is adjusted for storing one
Spend information.The processor is electrically connected to the reservoir and the transceiver.The processor is to execute following steps: according to the tune
Information is spent, judges that multiple user apparatus need to participate in radio resource scheduling and distribution；According to through the transceiver from each use
The received report message of family device institute, judges a received signal quality of the respectively user apparatus；According to the respectively user apparatus
The received signal quality executes a Downlink Control Information (DCI) subframe and repeatedly transmits number assessment adjustment programme, to judge respectively should
A DCI subframe of the user apparatus in a narrow frequency entity down control channel repeatedly transmits whether number needs to adjust, and adjusting need to
The DCI subframe of adjustment repeatedly transmits number；And after the DCI subframe repeatedly transmits number assessment adjustment programme, executing should
Radio resource scheduling and distribution.
In addition, the present invention more discloses a kind of dynamic allocation of radio resources method, it to be used for a base of a NB-IoT system
It stands.The base station includes a reservoir, a transceiver and a processor.The reservoir stores a scheduling information.The radio resource
Dynamic allocation method is executed by the processor and is comprised the steps of according to the scheduling information, judges that multiple user apparatus need to join
It dispatches and distributes with a radio resource；, from the received report message of respectively user apparatus institute, sentence according to through the transceiver
One received signal quality of the disconnected respectively user apparatus；According to the received signal quality of the respectively user apparatus, a DCI subframe is executed
Number assessment adjustment programme is repeatedly transmitted, to judge a respectively DCI of the user apparatus in a narrow frequency entity down control channel
Subframe repeatedly transmits whether number needs to adjust, and adjusts the DCI subframe that need to be adjusted and repeatedly transmit number；And in DCI
After frame repeatedly transmits number assessment adjustment programme, radio resource scheduling and distribution are executed.
After the embodiment refering to attached drawing and then described, those skilled in the art can understand of the invention other
Purpose and technological means and state sample implementation of the invention.
Detailed description of the invention
Fig. 1 is the schematic diagram in a NPDCCH period of NB-IoT system；
Fig. 2 is the schematic diagram of base station 1 of the invention；
Fig. 3 is the flow chart of the dynamic allocation of radio resources method of first embodiment of the invention；
Fig. 4 is that the DCI subframe in the dynamic allocation of radio resources method of second embodiment of the invention repeatedly transmits number
Assess the flow chart of adjustment programme；
Fig. 5 A-5C, which describes, executes the implementation example that DCI subframe of the invention repeatedly transmits number assessment adjustment programme；With
And
Fig. 6 A-6C is that the DCI subframe in the dynamic allocation of radio resources method of third embodiment of the invention repeatedly transmits
The flow chart of number assessment adjustment programme.
Symbol description
1: base station
11: transceiver
13: reservoir
15: processor
102: report message
S301-S307, S3051-S3057, S3071-S3078: step
UE1, UE2, UE3, UE4, UE5: user apparatus
SUE1, SUE2, SUE3, SUE4, SUE5: subframe
Specific embodiment
It will transmit through embodiment below to explain the content of present invention, the embodiment of the present invention is not intended to limit the invention must be
Any specific environment, application or particular form as described embodiments can be implemented.Explanation accordingly, with respect to embodiment is only
The purpose of the present invention is illustrated, rather than to limit the present invention.Need expositor, it is non-straight with the present invention in following embodiment and attached drawing
Connect relevant element to have been omitted from and be not painted, and the size relationship of each interelement is only to ask and be readily understood by attached drawing, not to
Limit actual ratio.
First embodiment of the invention is as shown in Figures 2 and 3.Fig. 2 is that one kind of the invention is used for a narrow frequency Internet of Things
(Narrowband Internet of Thing；NB-IoT) the schematic diagram of the base station 1 of system.The present invention can be used for NB-IoT system
System or other similar wireless communication systems based on time domain (time domain) dispatching technique.It may include more in NB-IoT system
A base station 1, and each base station 1 can multiple user apparatus (not being painted) into its signal covering scope service is provided.Base station 1 includes
Transceiver 11, reservoir 13 and processor 15.Processor 15 is electrically connected to transceiver 11 and reservoir 13.Palpus expositor, base
In illustrating simplified principle, other elements of base station 1, such as: Anneta module, power supply module etc. and the less relevant member of the present invention
Part is all omitted in figure and is not painted.
As described in one section of prior art, to make Downlink Control Information (Downlink Control Information；
DCI it) is able to be transmitted to the user apparatus positioned at base station signal covering scope marginal (cell edge) nearby, base station can penetrate will
The mode that Downlink Control Information repeatedly transmits rectifies the true success rate for solving data in user apparatus to improve.Therefore, 1 base of base station
The different covering scope locating for these user apparatus enhances grade (Coverage Enhancement Level；CE
Level) to configure narrow frequency entity down control channel (Narrowband Physical Downlink Control
Channel；NPDCCH the DCI subframe in) repeatedly transmits number.
For example, if covering scope enhancing grade is divided into three grades and its corresponding standard DCI subframe repeatedly transmits
Number is configured to 2 times, 4 times and 8 times, then base station 1 enhances grade based on covering scope locating for user apparatus, is distributed corresponding
DCI subframe repeatedly transmits the subframe of number to transmit Downlink Control Information to user apparatus.Due to those skilled in the art, answer
Covering scope enhancing etc. can be understood based on third generation partner program (3GPP) the prepared standard about NB-IoT system
Grade and its corresponding DCI subframe repeatedly transmit the configuration mode of number, therefore are not subject to superfluous words herein.
In addition, those skilled in the art also can be prepared about NB- based on third generation partner program (3GPP)
The standard of IoT system understands, base station 1 how the configuration based on NPDCCH, be configured accordingly narrow frequency entity DSCH Downlink Shared Channel
(Narrowband Physical Downlink Shared Channel；NPDSCH) and how each user apparatus is based on
Contained Downlink Control Information in NPDCCH obtains in the NPDSCH of instruction and captures its downlink data or in the NPUSCH biography of instruction
Its upstream data is given, accordingly hereby not superfluous words.
Fig. 3 is the flow chart of dynamic allocation of radio resources method of the invention, adjusts each user's dress through dynamic
The DCI subframe set repeatedly transmits number, especially for radio resource control (Radio Resource has been established
Control；RRC) online user apparatus, so that the configuration that DCI subframe repeatedly transmits number is incompletely limited to cover model
Enclose enhancing grade.Firstly, according to scheduling information stored in reservoir 13, processor 15 judges multiple in step S301
User apparatus need to participate in radio resource scheduling and distribution.Palpus expositor, scheduling information system base station 1 is according to required by user apparatus
Service and generate, can record the enhancing of covering scope locating for each user apparatus grade, the DCI subframe that configures at present repeats to pass
The information such as number, the data volume of required transmission and service class are sent, to carry out radio resource scheduling and distribution.
Then, in step S303, for processor 15 according to from the received report message 102 of each user apparatus, judgement is each
One received signal quality of the user apparatus.For example, report message 102 can be hybrid automatic repeat request (Hybrid
Automatic Repeat reQuest, HARQ) report message, positioning a system wireless channel measurements message, a channel quality
Indicate that (Channel Quality Indicator) message, (Link Adaptation) message is adjusted in a connection or its is any
Combination.
Then, in step S305, processor 15 executes a DCI subframe according to the received signal quality of each user apparatus
Number assessment adjustment programme is repeatedly transmitted, to judge whether DCI subframe of each user apparatus in NPDCCH repeatedly transmits number
It needs to adjust, and adjusts the DCI subframe that need to be adjusted and repeatedly transmit number.Then, in step S307, processor 15 is in DCI subframe weight
After multiple transmission times assessment adjustment programme, radio resource scheduling and distribution are executed.
For example, it is assumed that the standard DCI subframe of covering scope enhancing grade repeatedly transmits number and (is directed to and covers increasing
The DCI subframe of strong grade configuration repeatedly transmits number) it is 4 times, for multiple users in this covering scope enhancing grade
The each of device, in DCI subframe repeatedly transmit number assessment adjustment programme in, processor 15 can sequentially one user of selection dress
It sets (then claim first object user apparatus), and judges its received signal quality in whether reaching one in one first observing time section
High-quality condition.In an example, the first observing time section can be N number of NPDCCH period, and wherein N is a positive integer, Yi Jijie
The decision of HARQ report message content can be based upon by receiving signal quality.In the case, high-quality condition can return for N number of continuous HARQ
Report message all indicates that decoding is correct (that is, Acknowledgement；ACK).N can be adjusted by base station 1 based on actual operation.If N is
If 10, that is, representing needs 10 continuous HARQ report messages all to indicate that decoding is correct.
In other words, the data needed for transmitting first object user apparatus in N number of continuous or discontinuous NPDCCH period
Afterwards, processor 15 can judge to be passed in this N number of NPDCCH period according to the returned HARQ report message of first object user apparatus
Whether the data sent all are correctly decoded by first object user apparatus.If being all correctly decoded, (i.e. N number of continuous HARQ return disappears
Breath all instruction decodings are correct), then processor 15 judges the received signal quality of first object user apparatus in the first observing time
Reach high-quality condition in section.
When the received signal quality of first object user apparatus is when reaching high-quality condition in the first observing time section, place
I.e. the DCI subframe of first object user apparatus is repeatedly transmitted number downgrades a unit level to reason device 15, wireless to carry out next time
Electric resources scheduling and distribution.In this example, downgrade a unit level be represent by current DCI subframe repeatedly transmit number divided by
2, therefore when it is 4 times that standard DCI subframe, which repeatedly transmits number, first to downgrade unit level be that DCI subframe is repeatedly transmitted number
By come down to for 4 times 2 times and second downgrade when be that DCI subframe is repeatedly transmitted to number to be come down to 1 time by 2 times.Accordingly, processor 15
The DCI subframe of first object user apparatus can be repeated when this executes DCI subframe and repeatedly transmits number assessment adjustment programme
Transmission times come down to 2 times from 4 times, or further when execution next time DCI subframe repeatedly transmits number assessment adjustment programme
It comes down to 1 time.
In addition, in other examples, high-quality condition can at a distance between base station 1 less than a critical value (based on positioning system
System wireless channel measures message judgement), channel quality instruction fall within adjacent boundary's range (judging based on channel quality instruction message)
Or modulation and decoding process, better than a reference modulation and decoding process (based on the judgement of connection adaptation message), device 15 for processing is sentenced
Whether the received signal quality of first object user apparatus in N number of NPDCCH period that breaks all reaches high-quality condition.
Expositor is needed, base station 1 can all execute an aforementioned radio in each NPDCCH period or per N number of NPDCCH period
Resource dynamic distributing method, and the quantity of the user apparatus serviced needed for being further based on determine to execute radio money
The opportunity of source dynamic allocation method.Therefore, any frequency and execution for executing dynamic allocation of radio resources method of the invention
Opportunity comes under the scope of present application protection.
The second embodiment of the present invention, please also refer to Fig. 4 and Fig. 5 A-5C.Second embodiment is prolonging for first embodiment
It stretches, further illustrates that DCI subframe repeatedly transmits the correlation that number assesses adjustment programme in dynamic allocation of radio resources method
The step S305 of step, i.e. first embodiment further includes step shown in Fig. 4.In this present embodiment, radio resource need to be participated in
The grade user apparatus of scheduling and distribution are more divided into a standard and repeat group and a Weight variable complex group group.Standard repeats group
In user apparatus be to repeatedly transmit number for DCI subframe to repeatedly transmit the user apparatus of number equal to standard DCI subframe, i.e., not
It was adjusted that DCI subframe repeatedly transmits the user apparatus of number or DCI subframe repeatedly transmits number and is adjusted back standard DCI
Frame repeatedly transmits the user apparatus of number.User apparatus in Weight variable complex group group be repeatedly transmitted for DCI subframe number by
The user apparatus of adjustment, i.e. DCI subframe repeatedly transmit the user apparatus that number repeatedly transmits number not equal to standard DCI subframe.
Processor 15 is to repeat to select each user apparatus (user in standard repetition group in group in order from standard
Device is referred to as first object user apparatus) and select from Weight variable complex group group each user apparatus (Weight variable complex group group
In user apparatus be referred to as the second target subscriber device).In step S3051, processor 15 further judges user apparatus
Belong to Weight variable complex group group or standard repeats group.
Firstly, for the first object user apparatus for repeating group's selection from standard, in step S3053, processor
Whether 15 judge this first object user apparatus received signal quality in meeting high-quality condition in the first observing time section.As
Described in first embodiment, the first observing time section can be N number of NPDCCH period and high-quality condition can be N number of continuous
HARQ report message all indicates that decoding is correct (that is, Acknowledgement；ACK).
Then, if this first object user apparatus received signal quality is in reaching high-quality item in the first observing time section
Part thens follow the steps S3071, and the DCI subframe of this first object user apparatus is repeatedly transmitted number and downgrades a unit level, and
This first object user apparatus is transferred to Weight variable complex group group.Conversely, if this first object user apparatus received signal quality
In being not up to high-quality condition in the first observing time section, then the DCI subframe for representing this first object user apparatus repeatedly transmits
Number can not downgrade at present, therefore terminate the assessment adjustment programme of this first object user apparatus, i.e., do not do DCI subframe and repeatedly transmit
The adjustment of number.
For example, as indicated by figures 5 a-5b, it is assumed that NPDCCH radio resources allocation is 16 subframes, and in one
In the NPDCCH period, processor 15 is 16 subframes to be respectively configured to four user apparatus of same covering scope enhancing grade
UE1, UE2, UE3, UE4, DCI subframe, which repeatedly transmits number and is all equal to standard DCI subframe, repeatedly transmits number (such as: 4 times).
Accordingly, for this four user apparatus UE1, UE2, UE3, UE4, processor 15 distributes 4 subframes respectively to transmit its downlink control
Information processed, i.e. subframe SUE1, subframe SUE2, subframe SUE3, subframe SUE4.
After executing step S3051, step S3051 and step S3071 for user apparatus UE1, UE2, UE3, UE4, processing
Device 15 is by received signal quality in DCI for user apparatus UE1, the UE4 for reaching high-quality condition in the first observing time section
Frame repeatedly transmits number and downgrades a unit level (such as: coming down to 2 times) and user apparatus UE1, UE4 are transferred to variable repetition
Group.However, for received signal quality in user apparatus UE2, UE3 for being not up to high-quality condition in the first observing time section
Then keeping its DCI subframe to repeatedly transmit number is that standard DCI subframe repeatedly transmits number, and stays at standard and repeat group.
After repeatedly transmitting number adjustment via above-mentioned DCI subframe, due to the downlink required to transmit user apparatus UE1, UE4
The sub-frame number of control information has come down to 2 subframes respectively, therefore for the radio money in the subsequent NPDCCH period
Source scheduling and distribution, processor 15 in addition to by 16 subframes of NPDCCH to transmit under user apparatus UE1, UE2, UE3, UE4
Outside row control information, it also can be used to transmit the Downlink Control Information of other users device UE5.In this way, by above-mentioned DCI
Frame repeatedly transmits number assessment adjustment programme, and base station 1 is able to downlink needed for transmitting more users device in the NPDCCH period
Information and data are controlled, so that the radio resource of NPDSCH or NPUSCH is able to fully be assigned use.
Palpus expositor, user apparatus UE5 can be in same covering scope enhancing etc. with user apparatus UE1, UE2, UE3, UE4
Grade, therefore its standard DCI subframe repeatedly transmits number equal to 4, or is in different culverts from user apparatus UE1, UE2, UE3, UE4
Lid range enhance grade, therefore its DCI subframe repeatedly transmit number be repeatedly transmitted for trained DCI subframe number (such as:
It is come down to from 8 times 4 times).
Then, for one second target subscriber device in Weight variable complex group group, in step S3055, processor 15 is sentenced
Whether this second target subscriber device received signal quality break in reaching condition inferior in the second observing time section.Similarly,
Second observing time section can be the radio resource period of M NPDCCH, and wherein M is a positive integer, and condition inferior can be M
Continuous HARQ report message all indicates decoding failure (that is, Non-Acknowledgement；NACK).If if M is 2, i.e. generation
Table need 2 continuous HARQ report messages all indicate decode fails, just judge the second target subscriber device received signal quality in
Reach condition inferior in second observing time section.
Palpus expositor is the HARQ report message one for representing the second target subscriber device and being returned in the case where M is 1
Denier instruction decoding failure judges the second target subscriber device received signal quality in reaching inferior in the second observing time section
Condition.In addition, in other examples, condition inferior can for be greater than at a distance between base station 1 critical value (based on positioning system without
The judgement of line channel measurements message), channel quality instruction fallen within adjacent boundary's range (being judged based on channel quality instruction message) or adjusted
Become and be inferior to one with reference to modulation and decoding process (based on the judgement of connection adaptation message) with decoding process, device 15 for processing judges
Whether the received signal quality of the second target subscriber device all reaches condition inferior in M NPDCCH period
Then, if this second target subscriber device received signal quality is in reaching item inferior in the second observing time section
Part thens follow the steps S3075, the DCI subframe of user apparatus is repeatedly transmitted number sets back standard DCI subframe and repeatedly transmit time
Number (such as: recalled to from 2 times 4 times), and user apparatus is transferred to standard and repeats group.Conversely, S3057 is thened follow the steps, into
One step judge this second target subscriber device whether received signal quality in reach in the first observing time section high-quality condition and
It is not set to minimum DCI subframe and repeatedly transmits number (such as: 1 time).If this second target subscriber device received signal quality
Number is repeatedly transmitted in still reaching high-quality condition in the first observing time section and being not set to minimum DCI subframe, then is executed
Step S3073, by the DCI subframe of the second target subscriber device repeatedly transmit number downgrade again a unit level (such as: from 2
It is secondary to come down to 1 time).Conversely, if the second target subscriber device received signal quality is not up to high-quality in the first observing time section
Condition or received signal quality, which reach high-quality condition but have been set to minimum DCI subframe, repeatedly transmits number, then represents
This second target subscriber device do not need adjustment DCI subframe repeatedly transmit number, do not need yet transfer group, therefore terminate this second
The assessment adjustment programme of target subscriber device.
For example, as shown in Fig. 5 B-5C, it is assumed that user apparatus UE1, UE4, UE5 belong in Weight variable complex group group
Two target subscriber devices.Processor 15 is to execute step S3055, step S3057, step for user apparatus UE1, UE4, UE5
S3073 and step S3075.If the received signal quality of user apparatus UE4 in reaching condition inferior in the second observing time section,
Then processor 15 is the DCI subframe of user apparatus UE4 is repeatedly transmitted number to recall to standard DCI subframe to repeatedly transmit number
(being recalled to from 2 times to 4 times).
If the received signal quality of user apparatus UE1 is in condition not up to inferior in the second observing time section and its reception
Signal quality in be also not up in the first observing time section high-quality condition (in i.e. close several HARQ report messages, only 1
The instruction decoding failure of HARQ report message, and it is continuous without 2 continuous HARQ report message instruction decoding failures, and without 10
HARQ report message indicate successfully decoded), then processor 15 keeps the DCI subframe of user apparatus UE1 to repeatedly transmit number and be
Current DCI subframe repeatedly transmits number, and user apparatus UE1 is retained in Weight variable complex group group.
If the received signal quality of user apparatus UE5 is in condition not up to inferior in the second observing time section and in first
Also still reaching high-quality condition in observing time section (in i.e. close several HARQ report messages, does not have 2 continuous HARQ return to disappear
Breath instruction decoding failure, and there are still 10 continuous HARQ report messages to indicate successfully decoded) and its current DCI subframe
It repeatedly transmits number and is not set to minimum DCI subframe and repeatedly transmit number (such as: 1 time), then processor 15 is again by user
The DCI subframe of device UE5 repeatedly transmits number and downgrades a unit level (such as: coming down to from 4 times 2 times).
Expositor is needed, to simplify explanation, earlier figures 5A-5C assumes that user apparatus UE1, UE2, UE3, UE4, UE5 are all
The online user apparatus of RRC has been established, and required resource comes under general resource transmission, non-and arbitrary access (Random
Access) or (Paging) correlation is notified from a phone call, therefore 16 subframes of entire NPDCCH come under the specific search space of user apparatus
(UE-specific Search Space).However, when those skilled in the art can be appreciated that real base station operation, NPDCCH's
Configuration is not limited to 16 subframes, and NPDCCH may be simultaneously present multiple search spaces and (exist for random-access
Search space or search space for call).Due to the explanation of those skilled in the art based on the above embodiment, it may be appreciated that
How dynamic allocation of radio resources method of the invention is applied to the various situations of real base station operation, therefore is no longer subject to herein
It repeats.
In addition to above-mentioned steps, the dynamic allocation of radio resources method of the present embodiment can also execute institute in the first embodiment
All operations of elaboration simultaneously have all corresponding functions.Those skilled in the art can be directly acquainted with how this embodiment is based on
First embodiment executes these operations and has the function of this etc., therefore does not repeat.
The third embodiment of the present invention please refers to Fig. 6 A-6C.3rd embodiment is also the extension of first embodiment, into
One step illustrates that DCI subframe repeatedly transmits the correlation step that number assesses adjustment programme in dynamic allocation of radio resources method, i.e.,
The step S305 of first embodiment further includes step shown in Fig. 6 A-6C.Different from second embodiment, DCI of the present embodiment
Frame repeatedly transmits number assessment adjustment programme and judges connecing for this second target subscriber device received signal quality in step S3055
Signal quality is received after reaching condition inferior in the second observing time, is to execute step S3076, by this second target subscriber device
The DCI subframe of received signal quality repeatedly transmits number and increases a unit level (such as: being adjusted to from 2 times 4 times).In this example
In, increasing a unit level is to represent current DCI subframe repeatedly transmitting number multiplied by 2.
Then, in step S3077, it is secondary that processor 15 judges that the DCI subframe of this second target subscriber device repeatedly transmits
Whether number sets back standard DCI subframe repeatedly transmits number.If after step S3076 increases a unit level by this second
The DCI subframe of target subscriber device, which repeatedly transmits number and sets back standard DCI subframe, repeatedly transmits number, then processor 15 executes
This second target subscriber device is transferred to standard and repeats group by step S3078.Conversely, if through step S3076 increase this second
After the DCI subframe of target subscriber device repeatedly transmits one unit level of number, the DCI subframe of this second target subscriber device is repeated
Transmission times are not yet set back to standard DCI subframe and repeatedly transmit number, then terminate the assessment tune of this second target subscriber device
Whole program repeats group without transferring them to standard.
As shown in the above description, it is different from second embodiment, the DCI subframe of the present embodiment repeatedly transmits number assessment adjustment
Program after reaching condition inferior in the second observing time, is understood first in the received signal quality for judging this second target subscriber device
The DCI subframe for increasing this second target subscriber device repeatedly transmits one unit level of number, rather than its DCI subframe is repeatedly transmitted
Number directly recalls to standard DCI subframe and repeatedly transmits number.Furthermore the DCI subframe of the present embodiment repeatedly transmits number assessment and adjusts
Whole program is after the DCI subframe for increasing this second target subscriber device repeatedly transmits one unit level of number, unless adjusted
DCI subframe repeatedly transmits number and repeatedly transmits number equal to standard DCI subframe, otherwise only will not once be increased DCI subframe weight
As soon as after multiple transmission times unit level, this second target subscriber device being transferred to standard and repeats group.
Similarly, in addition to above-mentioned steps, the dynamic allocation of radio resources method of the present embodiment can also execute real first
It applies all operations illustrated in example and there are all corresponding functions.Those skilled in the art can be directly acquainted with this embodiment
How these operations to be executed based on first embodiment and have the function of this etc., therefore do not repeat.
In conclusion be based on base station can each the present invention provides a kind of dynamic allocation of radio resources mechanism
The information that user apparatus is returned judges the received signal quality of user apparatus, dynamically to adjust DCI of each user apparatus
Frame repeatedly transmits number, so that the configuration that DCI subframe repeatedly transmits number is incompletely limited to covering scope enhancing grade.Such as
This one, the present invention can repeatedly transmit number based on the DCI subframe after each user apparatus dynamic adjusts, and carry out radio money
Source scheduling and distribution, to service more user apparatus under limited radio resource, and then avoid the wave of radio resource
Take, to improve the utilization rate, overall system throughput and scheduling of resource flexibility ratio of radio resource.
Embodiment above-mentioned is only used to enumerate state sample implementation of the invention, and illustrates technical characteristic of the invention, not
For limiting protection category of the invention.Any skilled person can the arrangement of unlabored change or equality belong to
The range advocated of the present invention, the scope of the present invention should be subject to claims.
Claims (16)
1. one kind is used for the base station of narrow frequency Internet of Things (NB-IoT) system, include:
One reservoir, for storing a scheduling information；
One transceiver；And
One processor is electrically connected to the reservoir and the transceiver, to execute following steps:
According to the scheduling information, judge that multiple user apparatus need to participate in radio resource scheduling and distribution；
, from the respectively received report message of the user apparatus, judge that the one of the respectively user apparatus receives letter according to through the transceiver
Number quality；
According to the received signal quality of the respectively user apparatus, executes a Downlink Control Information (DCI) subframe and repeatedly transmit number
Adjustment programme is assessed, to judge that respectively a DCI of the user apparatus in a narrow frequency entity down control channel repeatedly transmits number
Whether need to adjust, and adjusts the DCI subframe that need to be adjusted and repeatedly transmit number；And
After the DCI subframe repeatedly transmits number assessment adjustment programme, radio resource scheduling and distribution are executed.
2. base station as described in claim 1, which is characterized in that the equal user apparatus are in same covering scope enhancing grade.
3. base station as described in claim 1, which is characterized in that the DCI subframe repeatedly transmits number assessment adjustment programme and includes
The following steps:
A first object user apparatus is selected from the grade user apparatus；
Judge whether the received signal quality of the first object user apparatus is excellent in reaching one in one first observing time section
Matter condition；And
When the received signal quality of the first object user apparatus is in reaching the high-quality condition in the first observing time section
When, the DCI subframe of the first object user apparatus is repeatedly transmitted into number and downgrades a unit level.
4. base station as claimed in claim 3, which is characterized in that the first object user apparatus repeats group selected from a standard
The grade DCI subframe that group and the standard repeat the grade user apparatus in group repeatedly transmits number and is all preset as a standard
DCI subframe repeatedly transmits number, and wherein the DCI subframe repeatedly transmits number assessment adjustment programme and further includes the following steps:
After the DCI subframe of the first object user apparatus to be repeatedly transmitted to number and downgrades the unit level, by first mesh
Mark user apparatus is transferred to a Weight variable complex group group.
5. base station as claimed in claim 4, which is characterized in that the DCI subframe repeatedly transmits number assessment adjustment programme and more wraps
Containing the following steps:
One second target subscriber device is selected from the equal user apparatus of the Weight variable complex group group；
Judge whether the received signal quality of second target subscriber device is bad in reaching one in one second observing time section
Matter condition；
When the received signal quality of second target subscriber device is when reaching the poor quality condition in the second observing time section,
It the DCI subframe of second target subscriber device is repeatedly transmitted into number sets back standard DCI subframe and repeatedly transmit number；With
And
It is repeatedly transmitted in the DCI subframe of second target subscriber device being repeatedly transmitted number setting back standard DCI subframe
After number, which is transferred to the standard and repeats group.
6. base station as claimed in claim 4, which is characterized in that the DCI subframe repeatedly transmits number assessment adjustment programme and more wraps
Containing the following steps:
One second target subscriber device is selected from the equal user apparatus of the Weight variable complex group group；
Judge whether the received signal quality of second target subscriber device is bad in reaching one in one second observing time section
Matter condition；
When the received signal quality of second target subscriber device is when reaching the poor quality condition in the second observing time section,
The DCI subframe of second target subscriber device is repeatedly transmitted into number and increases the unit level；
Judge that the DCI subframe of second target subscriber device repeatedly transmits whether number sets back standard DCI subframe weight
Multiple transmission times；And
It is repeatedly transmitted time when the DCI subframe of the second target subscriber device repeatedly transmits number and set back standard DCI subframe
When number, which is transferred to the standard and repeats group.
7. base station as claimed in claim 4, which is characterized in that the DCI subframe repeatedly transmits number assessment adjustment programme and more wraps
Containing the following steps:
One second target subscriber device is selected in the equal user apparatus from the Weight variable complex group group；
Judge whether the received signal quality of second target subscriber device is bad in reaching one in one second observing time section
Matter condition；
When second target subscriber device the received signal quality in the second observing time section be not up to the poor quality condition
When, judge whether the received signal quality of second target subscriber device is high-quality in reaching this in the first observing time section
Condition；
When the received signal quality of second target subscriber device reaches in the first observing time section in the high-quality item
When part, judge that the DCI subframe of second target subscriber device repeatedly transmits whether number has been set to a minimum DCI subframe
Repeatedly transmit number；And
Minimum DCI subframe repetition biography is not set to when the DCI subframe of second target subscriber device repeatedly transmits number
When sending number, the DCI subframe of second target subscriber device is repeatedly transmitted into number and downgrades the unit level again.
8. base station as described in claim 1, which is characterized in that the report message include it is following at least one: one mixing
Formula automatic repeat request report message, a positioning system wireless channel measurements message, a channel quality instruction message and a connection
Adaptation message.
9. a kind of dynamic allocation of radio resources method is used for a base station of narrow frequency Internet of Things (NB-IoT) system, the base
It stands comprising a reservoir, a transceiver and a processor, which stores a scheduling information, the dynamic allocation of radio resources
Method is executed and is comprised the steps of by the processor
According to the scheduling information, judge that multiple user apparatus need to participate in radio resource scheduling and distribution；
, from the received report message of respectively user apparatus institute, a reception of the respectively user apparatus is judged according to through the transceiver
Signal quality；
According to the received signal quality of the respectively user apparatus, executes a Downlink Control Information (DCI) subframe and repeatedly transmit number
Adjustment programme is assessed, to judge that respectively a DCI of the user apparatus in a narrow frequency entity down control channel repeatedly transmits number
Whether need to adjust, and adjusts the DCI subframe that need to be adjusted and repeatedly transmit number；And
After the DCI subframe repeatedly transmits number assessment adjustment programme, radio resource scheduling and distribution are executed.
10. dynamic allocation of radio resources method as claimed in claim 9, which is characterized in that the equal user apparatus are in same
One covering scope enhances grade.
11. dynamic allocation of radio resources method as claimed in claim 9, which is characterized in that the DCI subframe repeatedly transmits secondary
Number assessment adjustment programme comprises the steps of
A first object user apparatus is selected from the grade user apparatus；
Judge whether the received signal quality of the first object user apparatus is excellent in reaching one in one first observing time section
Matter condition；And
When the received signal quality of the first object user apparatus is in reaching the high-quality condition in the first observing time section
When, the DCI subframe of the first object user apparatus is repeatedly transmitted into number and downgrades a unit level.
12. dynamic allocation of radio resources method as claimed in claim 11, which is characterized in that the first object user apparatus
The grade DCI subframe for repeating the grade user apparatus in group and standard repetition group selected from a standard repeatedly transmits
Number is all preset as a standard DCI subframe and repeatedly transmits number, and wherein the DCI subframe repeatedly transmits number assessment adjustment programme packet
Containing the following steps:
After the DCI subframe of the first object user apparatus to be repeatedly transmitted to number and downgrades the unit level, by first mesh
Mark user apparatus is transferred to a Weight variable complex group group.
13. dynamic allocation of radio resources method as claimed in claim 12, which is characterized in that the DCI subframe repeatedly transmits
Number assessment adjustment programme comprises the steps of
One second target subscriber device is selected from the equal user apparatus of the Weight variable complex group group；
Judge whether the received signal quality of second target subscriber device is bad in reaching one in one second observing time section
Matter condition；
When the received signal quality of second target subscriber device is when reaching the poor quality condition in the second observing time section,
It the DCI subframe of second target subscriber device is repeatedly transmitted into number sets back standard DCI subframe and repeatedly transmit number；With
And
It is repeatedly transmitted in the DCI subframe of second target subscriber device being repeatedly transmitted number setting back standard DCI subframe
After number, which is transferred to the standard and repeats group.
14. dynamic allocation of radio resources method as claimed in claim 12, which is characterized in that the DCI subframe repeatedly transmits
Number assessment adjustment programme further includes the following steps:
One second target subscriber device is selected from the equal user apparatus of the Weight variable complex group group；
Judge whether the received signal quality of second target subscriber device is bad in reaching one in one second observing time section
Matter condition；
When the received signal quality of second target subscriber device is when reaching the poor quality condition in the second observing time section,
The DCI subframe of second target subscriber device is repeatedly transmitted into number and increases the unit level；
Judge that the DCI subframe of second target subscriber device repeatedly transmits whether number sets back standard DCI subframe weight
Multiple transmission times；And
It is repeatedly transmitted time when the DCI subframe of the second target subscriber device repeatedly transmits number and set back standard DCI subframe
When number, which is transferred to the standard and repeats group.
15. dynamic allocation of radio resources method as claimed in claim 12, which is characterized in that the DCI subframe repeatedly transmits
Number assessment adjustment programme comprises the steps of
One second target subscriber device is selected from the equal user apparatus of the Weight variable complex group group；
Judge whether the received signal quality of second target subscriber device is bad in reaching one in one second observing time section
Matter condition；
When second target subscriber device the received signal quality in the second observing time section be not up to the poor quality condition
When, judge whether the received signal quality of second target subscriber device is high-quality in reaching this in the first observing time section
Condition；
When the received signal quality of second target subscriber device is in reaching the high-quality condition in the first observing time section
When, judge that the DCI subframe of second target subscriber device repeatedly transmits whether number has been set to a minimum DCI subframe weight
Multiple transmission times；And
Minimum DCI subframe repetition biography is not set to when the DCI subframe of second target subscriber device repeatedly transmits number
When sending number, the DCI subframe of second target subscriber device is repeatedly transmitted into number and downgrades the unit level again.
16. dynamic allocation of radio resources method as claimed in claim 9, which is characterized in that the report message includes following
At least one: a hybrid automatic repeat request report message, positioning a system wireless channel measurements message, a channel matter
Measure instruction message and a connection adaptation message.
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