CN110740475A - semi-static scheduling device applied to power wireless private network - Google Patents
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Abstract
The invention provides semi-persistent scheduling devices applied to a power wireless private network, which comprise a resource configuration module , a resource configuration module , a resource configuration module II and a resource configuration module III, wherein the resource configuration module is used for configuring not less than 2 wireless frames in a semi-persistent scheduling period for SPS initial transmission and retransmission is still dynamically scheduled by a base station through a PDCCH when activated by a trigger signal, the resource configuration module II is used for configuring 1 wireless frame in the semi-persistent period for SPS initial transmission, 1 or more wireless frames are fixed for SPS retransmission, the retransmission does not need base station scheduling, the initial transmission and the retransmission adopt different redundancy versions, the resource configuration module III is used for configuring the semi-persistent scheduling period of multi-subband transmission when activated, wherein subbands carry out SPS initial transmission, other subbands are fixed for SPS retransmission, the base station scheduling is not needed, and the SPS initial transmission and the SPS retransmission adopt different redundancy versions, so that the transmission delay of a physical layer is reduced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to semi-static scheduling devices applied to a power wireless private network.
Background
In the prior art, services such as Voice generally send data packets at fixed time intervals and formats (for example, LTE Voice service (Voice over LTE, IMS-based Voice services, abbreviated as VoLTE) sends a data packet with a mac (media Access control) packet size of 328 bits at 20ms time intervals), and by using the characteristic of periodic continuous transmission, LTE (long Term evolution) introduces Semi-Persistent Scheduling (SPS for short) to optimize control information and improve resource utilization efficiency;
the basic scheduling unit of 4G TD-LTE (4G Time Division Long Term Evolution) is 1 subframe, the subframe length is 1 ms. PDCCH (Physical Downlink Control Channel) carrying scheduling information and PDSCH (Physical Downlink Shared Channel) carrying data are Time-Division multiplexed in the same subframes, semi-persistent scheduling resources are activated by PDCCH scrambled by SPS C-RNTI (Cell-Radio network temporary Identifier), activated SPS resources are periodically allocated to specific users until the PDCCH scrambled by SPS C-RNTI is deactivated, the SPS period takes the subframe unit as {10, 20, 32, 40, 64, 80, 128, 160, 320, 640} ms. Downlink retransmission resources are only used for transmission, and SPS is indicated by SPS C-RNTI scrambling indication.
Taking 4G TD-LTE TDD UL/DL configuration 0, SPS period 20ms as an example, in the example provided in fig. 1, subframe 0 of 10ms activates SPS resources, and performs initial transmission of SPS0 (corresponding to transport blocks of semi-persistent scheduling), and subframe 4 performs HARQ-ACK feedback.
If a semi-persistent scheduling mechanism in LTE is directly applied to the power wireless private network and is used for transmitting delay-sensitive services such as voice, the transmission delay is greatly increased, and when retransmission occurs, the transmission delay is further increased by steps, which results in poor user experience, etc. taking SPS period 20ms as an example, assuming that SPS resources are only used for initial transmission, as shown in fig. 2, initial transmission of SPS0 is performed in DwPTS fields of D and S of frame 0, and if initial transmission is wrong in U feedback HARQ-ack of frame 0, the PDCCH for retransmission can be transmitted at the earliest in frame 3, and SPS0 for retransmission is performed in frame 5.
Disclosure of Invention
In view of this, the present invention provides semi-persistent scheduling devices applied in the wireless power private network to reduce the delay generated during data transmission.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
A semi-static scheduling device applied to a power wireless private network, comprising:
a resource allocation module , the resource allocation module being configured to allocate not less than 2 radio frames in the semi-persistent scheduling period for SPS initial transmission when activated by a trigger signal;
a second resource configuration module, configured to configure 1 radio frame in the semi-persistent scheduling period for SPS initial transmission and 1 or more radio frames for SPS retransmission when activated by a trigger signal;
and a third resource configuration module, configured to configure a semi-persistent scheduling period of multi-subband transmission when the third resource configuration module is activated, where subbands perform SPS initial transmission, and other subbands perform SPS retransmission, and the SPS initial transmission and the SPS retransmission use different redundancy versions.
Optionally, in the semi-persistent scheduling apparatus applied to the power wireless private network, when the resource configuration module is activated, if it is detected that data retransmission is required, a preset retransmission mechanism is triggered in a manner that a base station activates PDCCH configuration, and when a preset data retransmission frame arrives in the semi-persistent scheduling period, data retransmission is performed.
Optionally, in the semi-persistent scheduling device applied to the power wireless private network, when the resource configuration module ii is activated, and when a wireless frame for performing SPS retransmission arrives, the resource configuration module ii activates a data retransmission mechanism, and when data initial transmission and data retransmission are performed, data redundancy versions adopted are different.
Optionally, in the semi-persistent scheduling device applied to the power wireless private network, when the resource configuration module iii is activated, and when a wireless frame for performing SPS retransmission arrives, the resource configuration module iii activates a data retransmission mechanism to control the other sub-bands to perform SPS retransmission.
Optionally, in the semi-persistent scheduling device applied to the power wireless private network, when the resource configuration module iii is activated, the wireless frame used for SPS initial transmission and the wireless frame used for SPS retransmission are the same or different.
Optionally, in the semi-persistent scheduling device applied to the power wireless private network, when activated, the resource configuration module configures each semi-persistent scheduling period to include four frames, and uses a fourth frame in the semi-persistent scheduling period as a data retransmission frame authorization frame, so as to perform retransmission authorization when an initial transmission error occurs, and perform data retransmission on a third frame and a fourth frame in the next semi-persistent scheduling periods.
Optionally, in the semi-persistent scheduling device applied to the power wireless private network, when the resource configuration module ii is activated, each semi-persistent scheduling period is configured to include two frames, where an th data frame is used as an SPS frame, a second data frame is used as a data retransmission frame, and the data retransmission frame is used for performing data retransmission on the uploaded data of the SPS frame in the semi-persistent scheduling period.
When version static scheduling is performed in the power wireless private network, a user can selectively activate the resource configuration module , the resource configuration module II and the resource configuration module III according to own requirements, and when the resource configuration module , the resource configuration module II and the resource configuration module III are activated, a data initial transmission or retransmission strategy matched with the modules is executed.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a diagram illustrating a data transmission scheme of 4G TD-LTE TDD UL/DL configuration 0 in the prior art;
FIG. 2 is a schematic diagram of a data retransmission method of 4G TD-LTE TDD UL/DL configuration 0 in the prior art;
fig. 3 is a schematic structural diagram of semi-persistent scheduling devices applied to a wireless private power network according to an embodiment of the present application;
fig. 4 is a schematic diagram of a data transmission method of semi-persistent scheduling devices according to an embodiment of the present application ;
fig. 5 is a schematic diagram of a data transmission method of semi-persistent scheduling devices according to another embodiment of the present application;
fig. 6 is a schematic diagram of data transmission modes of semi-persistent scheduling devices according to another embodiment of the present application .
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.
In the 4G TD-LTE, in order to support services such as VoIP, the data packet size of the services is relatively fixed, and the time interval between the data packets also meets the regularity of , so semi-persistent scheduling is introduced to reduce the overhead of a control Channel.
When RRC connection is established, parameters such as a semi-static scheduling period, HARQ process number, PUCCH resources for HARQ-ACK feedback and the like are configured for the UE through RRC signaling. After the SPS resources are configured, the SPS can not be used, and the PDCCH scrambled by the SPS C-RNTI must be used for activation.
The eNodeB activates/releases the SPS of the UE through the PDCCH scrambled by the SPS C-RNTI.
Once SPS is configured and activated, the UE may periodically use SPS resources to send and receive data.
Only SPS subframes (subframes for SPS initial transmission) out of SPS periods.
(10*SFN+subframe)＝[(10*SFNstart time+subframestart time)+N*semiPersistSchedIntervalDL]modulo 10240
Wherein the SFNstart time and subframe start time are the system frame number and subframe number of the PDCCH for activating the UE SPS. semipersistent schedule intervaldl is the downlink SPS period. The frequency domain resources and MCS, etc. of the SPS subframe are still indicated by the PDCCH activating SPS.
In the semi-persistent scheduling mechanism of 4G TD-LTE, RRC (Radio Resource Control, Radio Resource Control) configures SPS resources, the SPS resources must be activated by a PDCCH scrambled by an SPS C-RNTI, and only SPS subframes exist in each SPS period after activation.
In order to reduce the transmission delay of data, the present application discloses semi-persistent scheduling devices applied to a wireless power private network, which are used to implement semi-persistent scheduling in the wireless power private network, and referring to fig. 3, in the technical solution disclosed in the embodiment of the present application, the semi-persistent scheduling device applied to the wireless power private network includes:
the resource allocation module 100, the resource allocation module two 200, the resource allocation module three 300, the th transport block 410, the second transport block 420, and the third transport block 430, where the th transport block 410, the second transport block 420, and the third transport block 430 may be implemented by using a common transport block, that is, the transport block may be used as both the th transport block 410, the second transport block 420, and the third transport block 430, that is, when the resource allocation module 100 is activated, the transport block in the semi-persistent scheduling apparatus is used as the th transport block 410, when the resource allocation module two 200, the transport block in the semi-persistent scheduling apparatus is used as the second transport block 420, and when the resource allocation module three 300 is activated, the transport block in the semi-persistent scheduling apparatus is used as the third transport block 430.
When the resource configuration module is activated by a trigger signal (the resource configuration module is activated), the resource configuration module is configured to configure not less than 2 SPS frames in a semi-persistent scheduling period based on a radio resource control protocol RRC, that is, at least 2 SPS frames for performing initial data transmission are configured in the semi-persistent scheduling period, each SPS frame is used to perform initial data transmission on data to be transmitted, and thus, when the resource configuration module is activated by the trigger signal, because at least 2 SPS frames are configured in the semi-persistent scheduling period, at least two data transmissions are required in the semi-persistent scheduling period , the code rate for transmission is greatly reduced, the probability of successful detection is increased, and retransmission is avoided as much as possible, and when the resource configuration module is activated, the communication system still retains a retransmission mechanism, and the retransmission mechanism is still dynamically scheduled by the base station through a PDCCH.
When the resource allocation module is activated by a trigger signal, the transport block of the semi-persistent scheduling device is used as the th transport block, and is used for mapping to the physical resource contained in each SPS frame in the semi-persistent scheduling period in a rate matching manner and providing transmission data, and at this time, only transport blocks are used;
when activated by a trigger signal, the second resource configuration module is used for configuring or more data retransmission frames in a semi-persistent scheduling period, and when the data retransmission frames arrive, the second resource configuration module is used for performing data retransmission on data uploaded by the SPS frames in the same semi-persistent scheduling period;
when the second resource configuration module is activated by a trigger signal, two transport blocks of the semi-persistent scheduling device are used as second transport blocks, wherein second transport blocks correspond to an SPS frame in the semi-persistent scheduling period, another second transport blocks correspond to the data retransmission frame, when the second resource configuration module is activated, the second transport blocks are used for providing transport data and retransmission data for the SPS frame and the data retransmission frame, the data redundancy versions of the two transport blocks may be the same or different, when a radio frame for performing SPS retransmission arrives, a data retransmission mechanism is activated by the second resource configuration module, and when data initial transmission and data retransmission are performed, because the transport blocks corresponding to initial transmission and retransmission are different, when initial transmission and retransmission are performed, the data redundancy versions adopted by the second transport blocks are different;
when the third resource configuration module is activated, the third resource configuration module is configured to configure a semi-persistent scheduling period of multi-subband transmission, wherein subbands are used for SPS initial transmission, and other subbands are used for SPS retransmission, that is, the third resource configuration module can be used to be activated in a power wireless private network of multi-subband transmission, at this time, subbands are selected by the semi-persistent scheduling device to perform SPS initial transmission, the subband is not used for SPS retransmission, and other subbands are used for SPS retransmission, and the SPS initial transmission and the SPS retransmission are located in the same semi-persistent scheduling periods, and can be located in the same wireless frame or different wireless frames;
when the resource configuration module II is activated, the third transmission block is used for providing transmission data and retransmission data for SPS frames and data retransmission frames of each subband.
When version static scheduling is performed in the power wireless private network, a user can selectively activate the resource configuration module , the resource configuration module two or the resource configuration module three according to the self requirement, and when the resource configuration module , the resource configuration module two or the resource configuration module three is activated, a data initial transmission or retransmission strategy matched with the module is executed.
, in the technical solution disclosed in the embodiment of the present application, when the resource configuration module , the resource configuration module two, or the resource configuration module three is activated, the activated resource configuration module , the resource configuration module two, or the resource configuration module three needs to individually configure each frame in the semi-persistent scheduling period.
The resource configuration module is activated, the semi-persistent scheduling period includes a plurality of frames, and the resource configuration module is specifically configured to use more than 1 frame in the semi-persistent scheduling period as an SPS frame based on the radio resource control protocol, for example, when the resource configuration module is activated, the semi-persistent scheduling periods include four frames under the configuration of the resource configuration module , and the resource configuration module further uses the th data frame and the second data frame in the semi-persistent scheduling period as SPS frames based on the radio resource control protocol, and when the resource configuration module is activated, the system further retains a retransmission mechanism, that is, the fourth frame in the semi-persistent scheduling period is used as a data retransmission frame grant frame, for performing a retransmission grant on the fourth frame when an initial transmission error is detected, and performing a data retransmission on the third frame and the fourth frame in the next semi-persistent scheduling period.
When the resource configuration module ii is activated, under the configuration of the resource configuration module ii, the semi-persistent scheduling period includes two frames, where an th data frame is used as an SPS frame, and a second data frame is used as a data retransmission frame, and is used to perform data retransmission on the upload data of the SPS frame in the semi-persistent scheduling period, that is, when the resource configuration module ii is activated, in the same semi-persistent scheduling period, after the SPS frame completes initial data transmission, no matter whether the initial transmission is in error, no retransmission authorization needs to be performed, retransmission needs to be performed at the data retransmission frame in the period, so as to prevent a retransmission time that needs to be waited after the initial transmission is in error.
Specifically, for example, when the resource configuration module three is activated, under the configuration of the resource configuration module three, each sub-band in the electric wireless private network has two frames in a semi-persistent scheduling period, wherein sub-bands serve as the initial transmission sub-bands, frames serve as the SPS frames in the initial transmission sub-bands, other sub-bands serve as the retransmission sub-bands, frames serve as the data retransmission frames in the retransmission sub-bands, and the retransmission does not need authorization.
And , when the resource allocation module three allocates a primary transmission sub-band and a retransmission sub-band, the periods of the primary transmission sub-band and the retransmission sub-band are synchronized, and a data retransmission frame in the retransmission sub-band is synchronized with an SPS frame in the primary transmission sub-band.
, when configuring the initial transmission sub-band and the retransmission sub-band, the resource configuration module three may use the th frame in the semi-persistent scheduling period of the initial transmission sub-band as an SPS frame, and use the th frame in the semi-persistent scheduling period of the retransmission sub-band as a data retransmission frame.
In the technical solutions disclosed in the above embodiments of the present application, when the resource allocation module two or the resource allocation module three is activated, multiple transport blocks in the semi-persistent scheduling device need to be selected as a second transport block and a third transport block, and redundancy versions of the second transport block and the third transport block are the same or different, that is, redundancy versions of different second transport blocks may be the same or different, and redundancy versions of different third transport blocks may be the same or different.
When the resource configuration module is activated, the semi-persistent scheduling period may be as shown in fig. 4, in the example given in fig. 4, there are four frames in semi-persistent scheduling periods, each of which has a duration of 10ms, where frame 0, frame 1, frame 2 and frame 3 are located in the th semi-persistent scheduling period, frame 4, frame 5, frame 6 and frame 7 are located in the second semi-persistent scheduling period, frame 0, frame 1, frame 4 and frame 5 are used as initial data transmission frames, if frame 0, frame 1 and data transmission is not successful, frame 3, frame 6 and frame 7 are not used, when the data transmission of frame 0 and frame 1 is erroneous, data retransmission is authorized in the frame 3, and then data retransmission is performed at frame 6 and frame 7 in the next semi-persistent scheduling periods.
When the second resource configuration module is activated, the form of the semi-persistent scheduling period may be as shown in fig. 5, in the example given in fig. 5, semi-persistent scheduling periods have two frames, each frame has a duration of 10ms, where frame 0 and frame 1 are located in the th semi-persistent scheduling period, frame 2 and frame 3 are located in the second semi-persistent scheduling period, frame 4 and frame 5 are located in the third semi-persistent scheduling period, frame 0, frame 2 and frame 4 are used as data initial transmission frames, and frame 1, frame 3 and frame 5 are used as data initial transmission frames, when data initial transmission ends in the semi-persistent scheduling period described in the same , when a data frame arrives, data uploaded during retransmission of the initial transmission frame is directly retransmitted, and when retransmission is not required, retransmission authorization is not required.
When the resource configuration module iii is activated, the form of the semi-persistent scheduling period may be as shown in fig. 6, in the example given in fig. 6, the PDCCH configuration module ii takes subbands as initial transmission subbands for initial transmission of data, another subbands as retransmission subbands for retransmission of data, semi-persistent scheduling periods in each subband have two frames, each frame has a duration of 10ms, where frame 0 and frame 1 are located in th semi-persistent scheduling period, frame 2 and frame 3 are located in the second semi-persistent scheduling period, frame 4 and frame 5 are located in the third semi-persistent scheduling period, in the initial transmission subbands, frame 0, frame 2 and frame 4 are used as initial transmission frames of data, in the retransmission subbands, frame 0, frame 2 and frame 4 are used as retransmission frames of data, and the retransmission frames and retransmission frames perform data transmission simultaneously, and, when data of the initial transmission subbands in and data of data in upload frames of intermediate transmission subbands.
For ease of description, the above system is described as having its functionality divided into various modules, although the invention may be practiced with the functionality of the modules being implemented in the same or multiple software and/or hardware components.
The system and system embodiments described above are merely illustrative, wherein the elements described as separate components may or may not be physically separate, and the components displayed as the elements may or may not be physical elements, i.e., may be located in places, or may be distributed over a plurality of network elements.
further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of functionality for clarity of explanation of interchangeability of hardware and software.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It should also be noted that, herein, relational terms such as , second, and the like are only used to distinguish entities or operations from another entities or operations without necessarily requiring or implying any actual such relationship or order between such entities or operations, furthermore, the terms "comprise," "include," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements does not include only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (7)
1, A semi-static scheduling device for power wireless private network, comprising:
a resource allocation module , the resource allocation module is configured to allocate not less than 2 radio frames in a semi-persistent scheduling period for SPS initial transmission when activated by a trigger signal;
the second resource configuration module is used for configuring 1 wireless frame in a semi-persistent scheduling period for SPS initial transmission and fixing 1 or more wireless frames for SPS retransmission when the second resource configuration module is activated by a trigger signal;
and a third resource configuration module, configured to configure a semi-persistent scheduling period of multi-subband transmission when the third resource configuration module is activated, where subbands perform SPS initial transmission, and other subbands perform SPS retransmission, and the SPS initial transmission and the SPS retransmission use different redundancy versions.
2. The semi-persistent scheduling device applied to the wireless private network according to claim 1,
when the resource allocation module is activated, if it is detected that data retransmission is required, a preset retransmission mechanism is triggered by activating PDCCH allocation by the base station, and data retransmission is performed when a preset data retransmission frame arrives in the semi-persistent scheduling period.
3. The semi-persistent scheduling device applied to the wireless private network according to claim 1, wherein when the second resource allocation module is activated, when a wireless frame for SPS retransmission arrives, the second resource allocation module activates a data retransmission mechanism, and when data initial transmission and data retransmission are performed, the adopted data redundancy versions are different.
4. The semi-persistent scheduling device applied to the electric wireless private network according to claim 1, when the resource configuration module iii is activated, when a radio frame for performing SPS retransmission arrives, the resource configuration module iii activates a data retransmission mechanism to control the other sub-bands to perform SPS retransmission.
5. The semi-persistent scheduling device applied to the private wireless power network according to claim 1, wherein when the resource allocation module III is activated, the wireless frame for SPS initial transmission and the wireless frame for SPS retransmission are the same or different.
6. The semi-persistent scheduling device applied to the power wireless private network as claimed in claim 1, wherein when activated, the resource configuration module configures each semi-persistent scheduling period to contain four frames, and uses the fourth frame in the semi-persistent scheduling period as a data retransmission frame grant frame for performing retransmission grant in case of an initial transmission error, so as to perform data retransmission in the third frame and the fourth frame in the next semi-persistent scheduling periods.
7. The semi-persistent scheduling device applied to the wireless private network according to claim 1, wherein when the second resource allocation module is activated, each semi-persistent scheduling period is configured to include two frames, wherein the th data frame is used as an SPS frame, and the second data frame is used as a data retransmission frame, and the data retransmission frame is used for performing data retransmission on the uploaded data of the SPS frame in the semi-persistent scheduling period.
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| WO2018174664A1 (en) * | 2017-03-24 | 2018-09-27 | Samsung Electronics Co., Ltd. | Apparatus and method for semi-persistent scheduling and power control in wireless communication system |
| CN108633070A (en) * | 2017-03-24 | 2018-10-09 | 北京三星通信技术研究有限公司 | Semi-static resource scheduling method, Poewr control method and respective user equipment |
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| CN111818581A (en) * | 2020-07-30 | 2020-10-23 | 中国联合网络通信集团有限公司 | User access method and access network equipment |
| CN111818581B (en) * | 2020-07-30 | 2023-05-12 | 中国联合网络通信集团有限公司 | User access method and access network equipment |
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