CN111193580A - Method and device for transmitting downlink control and service in same frame - Google Patents
Method and device for transmitting downlink control and service in same frame Download PDFInfo
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- CN111193580A CN111193580A CN201811354393.0A CN201811354393A CN111193580A CN 111193580 A CN111193580 A CN 111193580A CN 201811354393 A CN201811354393 A CN 201811354393A CN 111193580 A CN111193580 A CN 111193580A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
Abstract
The embodiment of the invention provides a method and a device for transmitting downlink control and service in the same frame. The method comprises the steps of receiving multi-sub-band starting DCI sent by network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number; detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH initial subband number, and determining the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of the current frame; determining a sub-band used for PDCCH transmission according to the PDCCH initial sub-band number and the PDCCH transmission sub-band number; and obtaining the sub-band used by PDSCH transmission according to the sub-band used by PDCCH transmission, the starting sub-band number included by the downlink scheduling DCI and the number of the sub-band transmitted by the current frame. The embodiment of the invention can ensure the flexibility of DCI resource indication and effectively reduce the system processing capacity, thereby meeting the requirement of low time delay.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a method and a device for transmitting downlink control and service in the same frame.
Background
In order to enable the existing 230MHz power wireless private network system to support a low-delay application scenario, when multi-subband transmission is adopted, downlink control (PDCCH) and downlink service (PDSCH) transmission in the same frame need to be supported. Considering compromise between system efficiency and PDCCH channel demodulation performance, multi-subband aggregation of PDCCH needs to be supported, and similarly, multi-subband aggregation of PDSCH also needs to be supported, so as to improve link performance.
In the electric power wireless private network, the selectable sub-band frequency points are very rich, and if a resource scheduling mode of any combination is adopted, a large amount of Downlink Control Information (DCI) indication information needs to be added for indicating the sub-band allocation condition. How to effectively reduce DCI resource allocation indication information during downlink control and service transmission in the same frame under low latency, and reduce the processing complexity of system indication resource allocation is a problem to be solved urgently.
Disclosure of Invention
Aiming at the technical problems in the prior art, the embodiment of the invention provides a method and a device for sending downlink control and service in the same frame.
In a first aspect, an embodiment of the present invention provides a method for downlink control and service co-frame transmission, including:
receiving multi-subband starting DCI sent by network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number;
detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH starting subband number, and determining the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of a current frame;
determining a sub-band used for PDCCH transmission according to the PDCCH initial sub-band number and the PDCCH transmission sub-band number;
and obtaining the sub-band used for PDSCH transmission according to the sub-band used for PDCCH transmission, the starting sub-band number included in the downlink scheduling DCI and the number of the sub-band transmitted by the current frame.
In a second aspect, an embodiment of the present invention provides a downlink control and service co-frame transmission apparatus, including:
the first processing module is used for receiving the multi-subband starting DCI sent by the network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number;
a second processing module, configured to detect downlink scheduling DCI sent by the network side device according to the PDCCH starting subband number, and determine the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of the current frame;
a third processing module, configured to determine a subband used for PDCCH transmission according to the PDCCH starting subband number and the PDCCH transmission subband number;
and the fourth processing module is configured to obtain a subband used for PDSCH transmission according to the subband used for PDCCH transmission, and the starting subband number and the current frame transmission subband number included in the downlink scheduling DCI.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method provided in the first aspect when executing the program.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first aspect.
According to the method and the device for downlink control and service co-frame transmission provided by the embodiment of the invention, when the PDCCH and the PDSCH are co-frame transmitted, no additional resource indication information is needed, the initial transmission frame of the PDSCH is consistent with the initial transmission frame of the corresponding PDCCH, and after the PDCCH is detected in a blind manner, the sub-band actually used by the PDSCH can be obtained by deducting the sub-band occupied by the PDCCH, so that the system processing amount can be effectively reduced while the demodulation performance and the efficiency of a control channel are effectively considered, and the system time delay is reduced.
Drawings
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for sending a downlink control and service co-frame according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a downlink control and service co-frame transmitting apparatus according to an embodiment of the present invention;
fig. 3 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the defects that DCI sub-band resource allocation indication mode in the prior art is not suitable for electric wireless private networks with abundant available sub-band frequency points and causes large processing amount and low system overhead and efficiency, the embodiment of the invention provides a method for controlling and transmitting services in the same frame in a low time delay communication mode, and FIG. 1 is a flow schematic diagram of a method for transmitting downlink control and services in the same frame, as shown in FIG. 1, the method comprises the following steps:
the embodiment of the invention provides a low-delay communication system control and service transmission mechanism in the same frame, and PDCCH and PDSCH are used for continuous resource allocation. The DCI related to the multi-subband downlink is a multi-subband start DCI (denoted as W1), an uplink scheduling DCI (denoted as W2), and a downlink scheduling DCI (denoted as W3).
Specifically, W1 includes fields: the PDCCH start subband number First _ f and the PDCCH occupied subband number PDCCH _ span ═ 1, 2, 4, 8, 16, 32. W2 includes fields: PUSCH start subband number E. W3 includes fields: PDCCH or corresponding PDSCH starting subband number D and number of transmission subbands. In each embodiment of the invention, if a PDCCH and a PDSCH exist in a frame at the same time, the PDCCH refers to a starting subband; if only PDSCH exists in a frame, it refers to the starting subband of PDSCH.
When the same-frame transmission of control and service is performed, the multi-subband user equipment UE receives a multi-subband starting DCI (i.e., W1) sent by the network side equipment, uses a PDCCH starting subband number First _ f in W1 or a subBandId in an RRC reconfiguration message as a starting subband number S of a PDCCH search space, and uses a PDCCH occupied subband number PDCCH _ span as a subband range of the PDCCH search space.
in this embodiment of the present invention, the multi-subband starting DCI may further include indication information used to calculate a PDCCH transmission period, for example, a PDCCH period factor PDCCH-StartF and a PDCCH repetition frame number PDCCH-NumRepetitions. Correspondingly, the detecting the downlink scheduling DCI sent by the network side device according to the PDCCH starting subband number may specifically be: and when the next PDCCH transmission period starts, detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH starting subband number. The PDCCH transmission period T may be calculated according to the following formula, where T is PDCCH-NumRepetitions PDCCH-StartF, so as to determine a time domain range of a PDCCH search space. Wherein, PDCCH periodicity factor PDCCH-StartF ═ {1, 2, 4, 8, 16, 32, 48, 64} and PDCCH repetition frame number PDCCH-numrepetition ═ 1, 2, 4, 8, 16 }.
When the next PDCCH transmission period starts, the multi-subband UE jumps to the starting subband specified by the PDCCH starting subband number First _ f included in W1 to perform multi-subband PDCCH detection (i.e., receiving W3), and blind-detects different aggregation levels of the PDCCH according to different values of PDCCH occupied subband number PDCCH _ span, which may occupy 1, 2, 4, 8, and 16 subbands, thereby obtaining the number of transmission subbands of the PDCCH according to the aggregation levels: the PDCCH search space is used for only one user, and when there are 2 DCIs, the first DCI from the start position is an uplink scheduling DCI (i.e., W2), and the second DCI is a downlink scheduling DCI (i.e., W3).
According to the downlink scheduling DCI including the starting subband number of the PDCCH or the corresponding PDSCH and the number of current frame transmission subbands, the current frame transmission subbands can be determined.
102, determining a sub-band used for PDCCH transmission according to the PDCCH initial sub-band number and the PDCCH transmission sub-band number;
after obtaining the PDCCH starting subband number First _ f in W1 and the number of transmission subbands of the PDCCH, the UE may determine the subbands used for PDCCH transmission according to the number.
The initial transmission frame of the PDSCH coincides with the initial transmission frame of the corresponding PDCCH. And deducting the sub-band used by the PDCCH transmission from the current frame transmission sub-band to obtain the sub-band used by the PDSCH transmission. Specifically, a current frame transmission sub-band is determined according to a starting sub-band number of a PDCCH (physical downlink control channel) or a corresponding PDSCH (physical downlink shared channel) included in downlink scheduling DCI and the number of the current frame transmission sub-bands; then, the sub-band used for PDCCH transmission is deducted from the current frame transmission sub-band to obtain the sub-band used for PDSCH transmission.
In the embodiment of the present invention, the PDSCH transmitting frame number N is NRep × NF, where NRep is the PDSCH time domain repetition number in the downlink scheduling DCI (W3), and NF is the number of radio frames continuously occupied by one transport block.
On the basis of the above embodiment, the downlink scheduling DCI (W3) includes a starting subband number D of the PDCCH or the corresponding PDSCH, and the uplink scheduling DCI (W2) may further include a PUSCH starting subband E. The method embodiment may further comprise the steps of: and if judging that the starting subband number D included in the received downlink scheduling DCI is different from the PDCCH starting subband number S included in the multi-subband starting DCI and indicating subband switching, indicating the network side equipment to set the PDCCH starting subband number S included in the multi-subband starting DCI as a PUSCH starting subband number E in the uplink scheduling DCI, and enabling the parameter to take effect from the next transmission period of the PDCCH.
According to the downlink control and service transmission method in the same frame, when the PDCCH and the PDSCH are transmitted in the same frame, extra resource indication information is not needed, the initial transmission frame of the PDSCH is consistent with the initial transmission frame of the corresponding PDCCH, and after the PDCCH is detected in a blind mode, the sub-band occupied by the PDCCH is deducted to obtain the sub-band actually used by the PDSCH, so that the demodulation performance and efficiency of a control channel are effectively considered, meanwhile, the system processing capacity can be effectively reduced, and therefore the system time delay is reduced.
In the method for transmitting downlink control and service in the same frame provided in the embodiment of the present invention, a flexible DCI indication mode supporting the transmission in the same frame is: the downlink scheduling DCI indicates the PDCCH or the starting subband number and the transmission subband number of the corresponding PDSCH, and the flexibility of DCI resource indication can be ensured no matter whether the PDCCH and the PDSCH exist in the frame or not, so that the system processing capacity is effectively reduced, and the requirement of low time delay is met.
Fig. 2 is a schematic diagram of a downlink control and service co-frame transmitting apparatus provided in an embodiment of the present invention, and as shown in fig. 2, the apparatus includes a first processing module 201, a second processing module 202, a third processing module 203, and a fourth processing module 204, where:
the first processing module 201 is configured to receive multi-subband starting DCI sent by a network side device; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number; the second processing module 202 is configured to detect downlink scheduling DCI sent by the network side device according to the PDCCH starting subband number, and determine the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of the current frame; the third processing module 203 is configured to determine a subband used for PDCCH transmission according to the PDCCH starting subband number and the PDCCH transmission subband number; the fourth processing module 204 is configured to obtain a subband used for PDSCH transmission according to the subband used for PDCCH transmission, and the starting subband number and the current frame transmission subband number included in the downlink scheduling DCI.
The embodiment of the apparatus may be specifically configured to execute the embodiment of the method, and specific functions are described in the embodiment of the method for details, which are not described herein again.
According to the downlink control and service transmission device in the same frame, when the PDCCH and the PDSCH are transmitted in the same frame, extra resource indication information is not needed, the initial transmission frame of the PDSCH is consistent with the initial transmission frame of the corresponding PDCCH, and after the PDCCH is detected in a blind mode, the sub-band occupied by the PDCCH is deducted, so that the sub-band actually used by the PDSCH can be obtained, the demodulation performance and efficiency of a control channel are effectively considered, meanwhile, the system processing capacity can be effectively reduced, and therefore the system time delay is reduced.
Fig. 3 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 3, the electronic device may include: a processor (processor)310, a communication Interface (communication Interface)320, a memory (memory)330 and a communication bus 340, wherein the processor 310, the communication Interface 320 and the memory 330 communicate with each other via the communication bus 340. The processor 310 may invoke a computer program stored on the memory 330 and executable on the processor 310 to perform the transmission method provided by the above embodiments, including, for example: receiving multi-subband starting DCI sent by network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number; detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH starting subband number, and determining the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of a current frame; determining a sub-band used for PDCCH transmission according to the PDCCH initial sub-band number and the PDCCH transmission sub-band number; and obtaining the sub-band used for PDSCH transmission according to the sub-band used for PDCCH transmission, the starting sub-band number included in the downlink scheduling DCI and the number of the sub-band transmitted by the current frame.
In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and the method includes: receiving multi-subband starting DCI sent by network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number; detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH starting subband number, and determining the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of a current frame; determining a sub-band used for PDCCH transmission according to the PDCCH initial sub-band number and the PDCCH transmission sub-band number; and obtaining the sub-band used for PDSCH transmission according to the sub-band used for PDCCH transmission, the starting sub-band number included in the downlink scheduling DCI and the number of the sub-band transmitted by the current frame.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A method for transmitting downlink control and service in the same frame is characterized by comprising the following steps:
receiving multi-subband starting DCI sent by network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number;
detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH starting subband number, and determining the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of a current frame;
determining a sub-band used for PDCCH transmission according to the PDCCH initial sub-band number and the PDCCH transmission sub-band number;
and obtaining the sub-band used for PDSCH transmission according to the sub-band used for PDCCH transmission, the starting sub-band number included in the downlink scheduling DCI and the number of the sub-band transmitted by the current frame.
2. The method of claim 1, wherein the obtaining the subband used for the PDSCH transmission according to the subband used for the PDCCH transmission and a starting subband number and a current frame transmission subband number included in the downlink scheduling DCI comprises:
determining a current frame transmission sub-band according to a starting sub-band number and the current frame transmission sub-band number included in the downlink scheduling DCI;
and deducting the sub-band used by the PDCCH transmission from the current frame transmission sub-band to obtain the sub-band used by the PDSCH transmission.
3. The method of claim 1, wherein the multi-subband activation DCI further comprises indication information for calculating a PDCCH transmission period; correspondingly, the detecting the downlink scheduling DCI sent by the network side device according to the PDCCH starting subband number specifically includes:
and when the next PDCCH transmission period starts, detecting downlink scheduling DCI sent by the network side equipment according to the PDCCH starting subband number.
4. The method of claim 3, wherein the indication information comprises a PDCCH periodicity factor PDCCH-StartF and a PDCCH repetition frame number PDCCH-NumRepetitions; accordingly, the PDCCH transmission period T is calculated according to the following formula, where T is PDCCH-NumRepetitions PDCCH-StartF.
5. The method of claim 1, wherein the determining the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH comprises:
and according to different values of the number of sub-bands occupied by the PDCCH, obtaining the aggregation level corresponding to the PDCCH by blind detection, and determining the number of the sub-bands transmitted by the PDCCH according to the aggregation level.
6. The method of claim 1, further comprising:
and if the starting subband number included in the downlink scheduling DCI is judged to be different from the PDCCH starting subband number included in the multi-subband starting DCI, indicating the network side equipment to set the PDCCH starting subband number included in the multi-subband starting DCI as the PUSCH starting subband number in the uplink scheduling DCI.
7. A downlink control and service co-frame transmission apparatus, comprising:
the first processing module is used for receiving the multi-subband starting DCI sent by the network side equipment; the multi-subband starting DCI comprises a PDCCH starting subband number and a PDCCH occupied subband number;
a second processing module, configured to detect downlink scheduling DCI sent by the network side device according to the PDCCH starting subband number, and determine the number of PDCCH transmission subbands according to the number of subbands occupied by the PDCCH; the downlink scheduling DCI comprises a PDCCH or a starting subband number corresponding to the PDSCH and the number of transmission subbands of the current frame;
a third processing module, configured to determine a subband used for PDCCH transmission according to the PDCCH starting subband number and the PDCCH transmission subband number;
and the fourth processing module is configured to obtain a subband used for PDSCH transmission according to the subband used for PDCCH transmission, and the starting subband number and the current frame transmission subband number included in the downlink scheduling DCI.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 6 are implemented when the processor executes the program.
9. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
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Application publication date: 20200522 |