CN109922530A - A kind of electric power wireless private network control information propagation delay time optimization method - Google Patents
A kind of electric power wireless private network control information propagation delay time optimization method Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a kind of electric power wireless private networks to control information propagation delay time optimization method, this method is transmitted Physical Downlink Control Channel and Physical Downlink Shared Channel in a wireless sub-frame or different radio subframe for a radio frames by configuring running time-frequency resource, the multiplex mode of Physical Downlink Control Channel and Physical Downlink Shared Channel.The present invention can reduce control information propagation delay time, improve resource utilization.
Description
Technical field
The present invention relates to wireless communication technology fields, control information propagation delay time more particularly to a kind of electric power wireless private network
Optimization method.
Background technique
Electric power private wireless network system is wireless private network communication system of the work in 230MHz frequency range, and it is automatic to meet its distribution
Change, load management, power information acquisition, smart power grid user device service, emergency first-aid repair, special area video monitoring six are led greatly
The business demand in domain.
Electric power private wireless network system defines following three kinds of downlink physical control channels: physical down control format instruction letter
Road (Physical Control Format Indicator Channel, referred to as PCFICH)；Physical mixed autonomous retransmission is asked
Seek instruction channel (Physical Hybrid Automatic Retransmission Request Indicator
Channel, referred to as PHICH)；Physical Downlink Control Channel (Physical Downlink Control Channel, referred to as
For PDCCH).The information of PCFICH carrying is used to indicate the orthogonal frequency division multiplexing that PDCCH is transmitted in a subframe
The number of (Orthogonal Frequency Division Multiplexing, referred to as OFDM) symbol, the of subframe
It is sent in one OFDM symbol, place frequency location is true by system descending bandwidth and cell ID (Identity, referred to as ID)
It is fixed.PHICH is used to carry acknowledgement/non-acknowledgement (ACK/NACK) feedback information of uplink transmission data, the number of PHICH
Mesh, time-frequency location can as the descending carrier where PHICH Physical Broadcast Channel (Physical Broadcast Channel,
Referred to as PBCH) in system message and cell ID determine.PDCCH controls information (Downlink for bearing downlink
Control Information, referred to as DCI), comprising: uplink and downlink scheduling information and uplink power control information.Physics
Down control channel (PDCCH) and Physical Downlink Shared Channel (PDSCH) use time division multiplexing mode in subframe to carry out lower line number
It is believed that the transmission of breath, user equipment (UE) is according to the resource allocation information parsed in PDCCH, in corresponding PDSCH resource
Receive business datum.
The smart control business of electric power private wireless network system is mostly downlink control command, Physical Downlink Control Channel (PDCCH)
It is carried with Physical Downlink Shared Channel (PDSCH), due to will increase there are the possibility that PDCCH and PDSCH multiframe mode is transmitted
Time delay time delay, it is difficult to meet and reduces the descending scheduling time, the requirement such as delay of control even lower less than 50 milliseconds.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of electric power wireless private networks to control information propagation delay time optimization side
Method can reduce the propagation delay time of control information, improve resource utilization.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of electric power wireless private network control is provided
Information propagation delay time optimization method processed, comprising: base station obtain need to be transferred to electric power terminal control information size of data with
Delay upper bound；The base station determines to the electric power terminal transmitting physical downlink according to the size of data and delay upper bound and controls
It is used required for the required first running time-frequency resource size of channel PDCCH and transmitting physical DSCH Downlink Shared Channel PDSCH
The second running time-frequency resource size；The base station judges whether the wireless sub-frame in radio frames is greater than the first running time-frequency resource size and
Two running time-frequency resource size summations, wherein the radio frames include at least one wireless sub-frame；If the transmission subframe is less than
The summation of one time-frequency resource size and the second running time-frequency resource size, then two wireless sub-frames of same radio frames are selected in the base station
As control subframe, transmitted respectively in described two control subframes to the electric power terminal using time division multiplexing mode described in
PDCCH and PDSCH, and described two control are indicated to the electric power terminal using Physical Control Format Indicator Channel PCFICH
Position, multiplex mode and transferring content of the frame in radio frames；If the transmission subframe is greater than the first running time-frequency resource size
With the summation of the second running time-frequency resource size, then the selected wireless sub-frame in the base station is as control subframe, using frequency division multiplexing
Mode transmits the PDCCH and PDSCH to the electric power terminal in the control subframe, and is indicated using physical control format
Channel PCFICH indicates the control subframe in position, multiplex mode and the transmission in radio frames to the electric power terminal
Hold.
Preferably, described to be transmitted respectively in described two control subframes to the electric power terminal using time division multiplexing mode
In the step of PDCCH and PDSCH, when transmitting the PDCCH, the base station is passed in the different frequent points of the control subframe
The PDCCH of defeated difference electric power terminal, or different electric power terminals are successively transmitted in the identical frequency point of the control subframe
PDCCH, wherein the control subframe includes multiple time slots, and each time slot includes multiple frequency points.
Preferably, described to use frequency division multiplexing mode in the control subframe to described in electric power terminal transmission
It is other other than transmitting the frequency point of the PDCCH in the time slot for transmitting the PDCCH in the step of PDCCH and PDSCH
Frequency point does not transmit the PDSCH；In the time slot of no transmission PDCCH, all frequency points transmit the PDSCH.
Preferably, the base station, will be more when the different frequent points of the control subframe transmit the PDCCH of different electric power terminals
The PDCCH of a electric power terminal is in fixed time uniform transmission.
The beneficial effects of the present invention are: being in contrast to the prior art, by configuring Physical Downlink Control Channel and object
Running time-frequency resource, the multiplex mode for managing DSCH Downlink Shared Channel, allow Physical Downlink Control Channel and Physical Downlink Shared Channel to exist
It is transmitted in the wireless sub-frame or different radio subframe of radio frames, so as to reduce control information propagation delay time,
Improve resource utilization.
Detailed description of the invention
Fig. 1 is the flow diagram of electric power wireless private network control information propagation delay time optimization method.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiments are merely a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Refering to fig. 1, the electric power wireless private network control information propagation delay time optimization method of the embodiment of the present invention includes:
S1: base station obtains the size of data and delay upper bound for needing to be transferred to the control information of electric power terminal.
Wherein, typically, in general electric power wireless private network, the size of data of the control information for smart control business is
100 to 1000kb, the delay upper bound for controlling information is 50 milliseconds, even lower.
S2: base station, which is determined according to size of data and delay upper bound to electric power terminal, transmits PDCCH required first
Running time-frequency resource size and the transmission required second running time-frequency resource size of PDSCH.
S3: base station judges whether the wireless sub-frame in radio frames is greater than the first running time-frequency resource size and the second running time-frequency resource is big
Small summation, wherein radio frames include at least one wireless sub-frame.
Wherein, if wireless sub-frame be greater than the first running time-frequency resource size and the second running time-frequency resource size summation, PDCCH and
PDSCH can be transmitted in a wireless sub-frame, otherwise need to transmit on different wireless sub-frames.
S4: if transmission subframe is less than the summation of the first running time-frequency resource size and the second running time-frequency resource size, base station choosing
Two wireless sub-frames of fixed same radio frames are as control subframe, using time division multiplexing mode to electric power in two control subframes
Terminal transmits PDCCH and PDSCH respectively, and indicates position of two control subframes in radio frames to electric power terminal using PCFICH
It sets, multiplex mode and transferring content.
Wherein, in the present embodiment, it is transmitted respectively in two control subframes to electric power terminal using time division multiplexing mode
In the step of PDCCH and PDSCH, when transmitting PDCCH, different electric power terminals are transmitted in the different frequent points of control subframe in base station
PDCCH, or the PDCCH of different electric power terminals is successively transmitted in the identical frequency point for controlling subframe, wherein control subframe includes more
A time slot, each time slot include multiple frequency points.That is, if the PDCCH of some electric power terminal and other electric power terminals
PDCCH is not take up identical frequency point, then can simultaneous transmission in one time slot, if occupying identical frequency point, according to successively suitable
Sequence is transmitted.
Further, in order to improve the availability of frequency spectrum, different electric power terminals are transmitted in the different frequent points of control subframe in base station
PDCCH when, by the PDCCH of multiple electric power terminals in fixed time uniform transmission.
S5: if transmission subframe is greater than the summation of the first running time-frequency resource size and the second running time-frequency resource size, base station choosing
A fixed wireless sub-frame as control subframe, using frequency division multiplexing mode in control subframe to electric power terminal transmission PDCCH and
PDSCH, and indicate control subframe in position, multiplex mode and the transmission in radio frames to electric power terminal using PCFICH
Hold.
Wherein, in the present embodiment, the PDCCH is transmitted to electric power terminal in control subframe using frequency division multiplexing mode
And in the step of PDSCH, in the time slot of transmission PDCCH, other than the frequency point of transmission PDCCH, other frequency points are not transmitted
PDSCH；In the time slot of no transmission PDCCH, all frequency points transmit PDSCH.That is, when having specific frequency point in time slot
When transmitting PDCCH, other frequency points of the time slot also do not transmit PDSCH；When there is no frequency point to transmit PDCCH in time slot, the time slot
All frequency points transmit PDSCH.
For electric power terminal, if transmitting PDCCH in the time-frequency domain resources of PCFICH instruction control subframe multiplexing,
The transmission of PDCCH is carried out in control subframe；If transmitting PDSCH in the time-frequency domain resources of PCFICH instruction control subframe multiplexing,
The transmission of PDSCH is then carried out on whole frequency points of control subframe.
By the above-mentioned means, the electric power wireless private network control information propagation delay time optimization method of the embodiment of the present invention is by matching
Running time-frequency resource, the multiplex mode for setting Physical Downlink Control Channel and Physical Downlink Shared Channel, make Physical Downlink Control Channel and
Physical Downlink Shared Channel can be transmitted in a wireless sub-frame or different radio subframe for radio frames, so as to
Control information propagation delay time is reduced, resource utilization is improved.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (4)
1. a kind of electric power wireless private network controls information propagation delay time optimization method characterized by comprising
Base station obtains the size of data and delay upper bound for needing to be transferred to the control information of electric power terminal；
The base station is determined according to the size of data and delay upper bound to the electric power terminal transmitting physical downlink channel control
The required first running time-frequency resource size of PDCCH and transmitting physical DSCH Downlink Shared Channel PDSCH required
Two running time-frequency resource sizes；
The base station judges whether the wireless sub-frame in radio frames is greater than the first running time-frequency resource size and the second running time-frequency resource size
Summation, wherein the radio frames include at least one wireless sub-frame；
If the transmission subframe is less than the summation of the first running time-frequency resource size and the second running time-frequency resource size, the base station choosing
Two wireless sub-frames of fixed same radio frames as control subframe, using time division multiplexing mode in described two control subframes to
The electric power terminal transmits the PDCCH and PDSCH respectively, and utilizes Physical Control Format Indicator Channel PCFICH to the electricity
Power terminal indicates position, multiplex mode and transferring content of described two control subframes in radio frames；
If the transmission subframe is greater than the summation of the first running time-frequency resource size and the second running time-frequency resource size, the base station choosing
A fixed wireless sub-frame is transmitted in the control subframe to the electric power terminal as control subframe, using frequency division multiplexing mode
The PDCCH and PDSCH, and control is indicated to the electric power terminal using Physical Control Format Indicator Channel PCFICH
Position, multiplex mode and transferring content of the frame in radio frames.
2. the method according to claim 1, wherein described sub in described two controls using time division multiplexing mode
In the step of transmitting PDCCH and PDSCH respectively to the electric power terminal on frame, when transmitting the PDCCH, the base station
The PDCCH of different electric power terminals, or the identical frequency point in the control subframe are transmitted in the different frequent points of the control subframe
Successively transmit the PDCCH of different electric power terminals, wherein the control subframe includes multiple time slots, and each time slot includes multiple frequencies
Point.
3. according to the method described in claim 2, it is characterized in that, described use frequency division multiplexing mode in the control subframe
In the step of transmitting PDCCH and PDSCH to the electric power terminal, in the time slot for transmitting the PDCCH, in addition to transmitting institute
Except the frequency point for stating PDCCH, other frequency points do not transmit the PDSCH；In the time slot of no transmission PDCCH, own
Frequency point transmits the PDSCH.
4. according to the method described in claim 2, it is characterized in that, the base station is transmitted in the different frequent points of the control subframe
When the PDCCH of different electric power terminals, by the PDCCH of multiple electric power terminals in fixed time uniform transmission.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910264009.6A CN109922530B (en) | 2019-04-03 | 2019-04-03 | Method for optimizing transmission delay of control information of power wireless private network |
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| CN201910264009.6A CN109922530B (en) | 2019-04-03 | 2019-04-03 | Method for optimizing transmission delay of control information of power wireless private network |
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