CN110784924B - Network equipment, terminal equipment and communication system and method composed of network equipment and terminal equipment - Google Patents
Network equipment, terminal equipment and communication system and method composed of network equipment and terminal equipment Download PDFInfo
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- CN110784924B CN110784924B CN201810858309.2A CN201810858309A CN110784924B CN 110784924 B CN110784924 B CN 110784924B CN 201810858309 A CN201810858309 A CN 201810858309A CN 110784924 B CN110784924 B CN 110784924B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000011664 signaling Effects 0.000 claims description 30
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 claims description 10
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 23
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The application discloses network equipment, terminal equipment and a communication system and a method formed by the network equipment and the terminal equipment, and solves the problem that the uplink data transmission efficiency of an unlicensed frequency band in the prior art is low. The communication system comprises a network device and a terminal device. The network device is connected to at least one terminal device. The terminal device comprises a terminal data unit and a terminal control unit. The network device comprises a network data unit and a network control unit. The network control unit sends the starting position, the redundant position indication, the duration time and the frequency domain position to the terminal control unit through the downlink control channel. The redundant position indication is the number of symbols that can be used as a starting position after the starting position in the uplink data shared channel transmission slot. The terminal data units are sequentially shifted from the start position up to the number of symbols indicated by the redundant position until the time domain position for transmitting the data is determined. And transmitting data to the network data unit in the duration through the uplink data sharing channel according to the time domain position and the frequency domain position.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to a network device, a terminal device, and a communication system and method formed by the same.
Background
As the 5G first edition standard is completed, the 5G will gradually expand to different fields. One of the important directions is the use of unlicensed bands. With respect to licensed bands, unlicensed bands need to consider coexistence between different systems, typically such as Wifi systems, LTE-based LAA systems, and the like. In order to allow multiple systems to coexist in harmony, regulatory authorities in various countries use forced Listen Before Talk (LBT) technology for unlicensed bands, i.e. data transmission is only possible when it is detected that the current channel is not occupied. A problem with this mechanism is that some data cannot be guaranteed to be sent at a certain location. This problem becomes more pronounced for upstream transmissions. The uplink data transmission often needs to be performed according to the downlink scheduling. In the current 5G new air interface specification, downlink control information indicator (DCI) needs to give the time domain and frequency domain positions of the specific transmission of the uplink data channel. When DCI gives a specific time domain position of PUSCH, the position is likely to be unable to transmit data due to LBT, thus causing an indication of inefficiency. Once the invalid indication occurs, the terminal will have to wait for a new DCI indication to send the data. While for the base station, a certain time is also required for new DCI indication transmission. The whole process can greatly reduce the uplink data transmission efficiency in the unlicensed frequency band.
Therefore, the invention provides a communication system and a method, which solve the problem of low uplink data transmission efficiency in an unlicensed frequency band in the prior art, can realize that the same user has a plurality of starting positions in one time slot, well avoid the failure of downlink control signals caused by fixed starting symbols brought by LBT, and can realize the time division multiplexing of different users on the same frequency domain resources in the same time slot, thereby improving the spectrum efficiency of the whole system.
Disclosure of Invention
The embodiment of the application provides network equipment, which solves the problem of low uplink data transmission efficiency in an unlicensed frequency band in the prior art.
The network device comprises a network data unit and a network control unit.
The network data unit comprises a downlink signal sending module and an uplink signal receiving module.
The network control unit comprises a downlink signaling sending module and an uplink signaling receiving module.
The downlink signal sending module is used for sending data to the terminal equipment through a downlink data sharing channel.
The uplink signal receiving module is configured to receive data through an uplink data sharing channel.
The downlink signaling sending module is configured to send downlink control information to the terminal device through a downlink control channel.
The downlink control information includes a start position, a redundant position indication, a duration, and a frequency domain position.
And the uplink signaling receiving module is used for receiving the ACK/NACK information through an uplink control channel.
The redundant position indication is used for indicating the number of symbols which can be used as the starting position after the starting position in the uplink data sharing channel sending time slot.
The embodiment of the application also provides terminal equipment, which comprises a terminal data unit and a terminal control unit.
The terminal data unit comprises an uplink signal sending module and a downlink signal receiving module.
The terminal control unit comprises an uplink signaling sending module and a downlink signaling receiving module.
The uplink signal sending module is used for sending data to the network equipment through an uplink data sharing channel.
The downlink signal receiving module is used for receiving data through a downlink data sharing channel;
and the uplink signaling sending module is used for sending the ACK/NACK information to the network equipment through an uplink control channel.
The downlink signaling receiving module is configured to receive downlink control information through a downlink control channel.
The downlink control information includes a start position, a redundant position indication, a duration, and a frequency domain position.
The redundant position indication is used for indicating the number of symbols which can be used as the starting position after the starting position in the uplink data sharing channel sending time slot.
The embodiment also provides a communication system, which comprises a network device and a terminal device.
The network device is connected with at least one terminal device.
The terminal device comprises a terminal data unit and a terminal control unit.
The network device comprises a network data unit and a network control unit.
The network control unit is configured to send downlink control information to the terminal control unit through a downlink control channel.
The downlink control information includes a start position, a redundant position indication, a duration, and a frequency domain position.
The redundant position indication is used for indicating the number of symbols which can be used as the starting position after the starting position in the uplink data sharing channel sending time slot.
And the terminal data unit is used for sequentially moving the starting position backwards to the number of symbols indicated by the redundant position until the time domain position for transmitting data is determined, and transmitting data to the network data unit in the duration time through an uplink data sharing channel according to the time domain position and the frequency domain position.
Preferably, the redundant position indication may be for a plurality of time slots.
Preferably, in one time slot, the time-domain and frequency-domain resources between the starting position and the redundant position indicating the most symbol number positions that can be moved cannot be allocated to different users, and the remaining time-domain and frequency-domain resources can be allocated to other users.
Preferably, the redundant position indication is K bits, and the K value is an integer greater than or equal to 0 and less than or equal to 4.
Preferably, the K value and the number of representative symbols are set by the network device and transmitted to the terminal device by means of higher layer signaling and/or default values.
The embodiment of the application also provides a communication method for the communication system, which comprises the following steps:
and sending downlink control information to the terminal control unit through a downlink control channel.
Sequentially moving from the start position back up to the number of symbols indicated by the redundant position until a time domain position for transmitting data is determined.
And transmitting data to the network data unit in the duration through an uplink data sharing channel according to the time domain position and the frequency domain position.
The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect:
the communication system and the method solve the problem of low uplink data transmission efficiency in an unlicensed frequency band in the prior art, can realize that the same user has a plurality of starting positions in one time slot, well avoid the failure of downlink control signals caused by fixed starting symbols brought by LBT, and can realize time division multiplexing of different users on the same frequency domain resources in the same time slot, thereby improving the spectrum efficiency of the whole system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
fig. 1 is a block diagram of a network device according to an embodiment of the present application;
fig. 2 is a block diagram of a terminal device according to an embodiment of the present application;
fig. 3 is a system diagram of a communication system according to an embodiment of the present application;
fig. 4 is a flowchart of a communication method according to an embodiment of the present application.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a block diagram of a network device provided in an embodiment of the present application, and as shown in fig. 1, the network device provided in the embodiment includes a network data unit and a network control unit.
The network data unit comprises a downlink signal sending module and an uplink signal receiving module. The network control unit comprises a downlink signaling sending module and an uplink signaling receiving module.
The downlink signal sending module is used for sending data to the terminal equipment through a downlink data sharing channel. The uplink signal receiving module is used for receiving data through an uplink data sharing channel. The downlink signaling sending module is used for sending downlink control information to the terminal equipment through a downlink control channel. The downlink control information includes a start position, a redundant position indication, a duration, and a frequency domain position. The uplink signaling receiving module is used for receiving ACK/NACK information through an uplink control channel. The redundant position indication is used for indicating the number of symbols which can be used as the starting position after the starting position in the uplink data sharing channel transmission time slot.
As an embodiment of the present application, the network device may be connected to a plurality of terminal devices. And the downlink signaling sending module of the network equipment sends downlink control information to the terminal equipment and is used for providing a scheduling scheme for the terminal equipment to send data through the uplink data sharing channel. And the terminal equipment feeds back an ACK/NACK information through the uplink control channel and/or sends data through the uplink data sharing channel according to the receiving result after receiving the downlink control information.
Fig. 2 is a block diagram of a terminal device provided in an embodiment of the present application, and as shown in fig. 2, the terminal device provided in the embodiment includes a terminal data unit and a terminal control unit.
The terminal data unit comprises an uplink signal sending module and a downlink signal receiving module. The terminal control unit comprises an uplink signaling sending module and a downlink signaling receiving module.
The uplink signal sending module is used for sending data to the network equipment through an uplink data sharing channel. The downlink signal receiving module is used for receiving data through a downlink data sharing channel. The uplink signaling sending module is used for sending ACK/NACK information to the network equipment through an uplink control channel. The downlink signaling receiving module is used for receiving downlink control information through a downlink control channel. The downlink control information includes a start position, a redundant position indication, a duration, and a frequency domain position. The redundant position indication is used for indicating the number of symbols which can be used as the starting position after the starting position in the uplink data sharing channel transmission time slot.
As an embodiment of the present application, the terminal device is connected to a network device. And the terminal equipment receives the downlink control information sent by the network equipment through a downlink signaling receiving module and is used for providing a scheduling scheme for the terminal equipment to send data through the uplink data sharing channel. And the terminal equipment feeds back an ACK/NACK information through the uplink control channel according to a receiving result after receiving the downlink control information and/or sends data to the network equipment through the uplink data sharing channel.
Fig. 3 is a system diagram of a communication system provided in an embodiment of the present application, and as shown in fig. 3, the communication system provided in the embodiment includes a network device and a terminal device.
The network device is connected with at least one terminal device.
The terminal device comprises a fixed network terminal device or a mobile terminal device, and may be, for example: a cell phone, a computer, a game machine with networking functions, etc.
The terminal device comprises a terminal data unit and a terminal control unit. The network device comprises a network data unit and a network control unit. The network control unit is used for sending downlink control information to the terminal control unit through a downlink control channel. The downlink control information includes a start position, a redundant position indication, a duration, and a frequency domain position. The redundant position indication is used for indicating the number of symbols which can be used as the starting position after the starting position in the uplink data sharing channel transmission time slot.
In this embodiment, the duration is a time of moving N positions backward from the start position, where N is a positive integer.
The redundant position indication is used as an indication of the possible starting position of the uplink data shared channel and can be used for a plurality of time slots. Within one time slot, the time-domain and frequency-domain resources between the starting position and the redundant position indicating the most symbol number positions that can be moved cannot be allocated to different users, and the remaining time-domain and frequency-domain resources can be allocated to other users. The redundant position indication is K bits, and the K value is an integer greater than or equal to 0 and less than or equal to 4. Typical values are 1, 2. The redundant location indication is used to indicate subsequent symbols that are available within the uplink data shared channel transmission slot. If the K value is 1, the downlink data shared channel transmission may start with subsequent consecutive 1 to 2 symbols. The K value and the representative number of symbols are set by the network device and transmitted to the terminal device by means of higher layer signaling and/or default values.
And the terminal data unit is used for sequentially moving the starting position backwards to the number of symbols indicated by the redundant position until the time domain position for transmitting data is determined, and transmitting data to the network data unit in the duration time through an uplink data sharing channel according to the time domain position and the frequency domain position.
As an embodiment of the present application, the downlink control information is used to provide a scheduling scheme for the uplink data shared channel. And the terminal data unit transmits data to the network data unit through the uplink data sharing channel according to the scheduling scheme. And the terminal control unit is used for sending the ACK/NACK information to the network control unit through an uplink control channel. The network data unit is used for sending data to the terminal data unit through a downlink data sharing channel.
Specifically, the terminal data unit determines a starting time domain position of the uplink data shared channel data according to the downlink control information by sequentially moving positions backward from the starting position within the number of movable symbols indicated by the redundant position indication. And then according to the time domain position and the frequency domain position in the downlink control information. When the value of K is greater than 0, sequentially shifting backward from the start position up to the number of symbols indicated by the redundant position until it is determined that the time domain position or the backward sequential shifting position available for transmitting data of the uplink data shared channel is equal to the value given by K. When the value of K is equal to 0, the uplink data channel transmission position is the start position or any position after the start position, which satisfies the end of the data transmission at the present time slot.
And after the time domain position of the transmitted data is determined, the terminal data unit transmits data to the network data unit in the duration through an uplink data sharing channel according to the time domain position and the frequency domain position.
Fig. 4 is a flowchart of a communication method according to an embodiment of the present application, where the communication method is used in the above-mentioned communication system. The communication method provided by the embodiment comprises the following steps:
step 101: and sending downlink control information to the terminal control unit through a downlink control channel.
In step 101, the network control center sends downlink control information for providing a scheduling scheme for the uplink data sharing channel to the terminal control center through a downlink control channel. The downlink control information includes information such as a start position, a redundant position indication, a duration time, and a frequency domain position of an uplink data shared channel.
Specifically, the duration is a time to move N positions backward from the start position, where N is a positive integer. The end position indication is K bits, and the K value is an integer greater than or equal to 0 and less than or equal to 4. Typical values are 1, 2. The redundant location indication is used to indicate subsequent symbols that are available within the uplink data shared channel transmission slot. If the K value is 1, the downlink data shared channel transmission may start with subsequent consecutive 1 to 2 symbols. The K value and the representative number of symbols are set by the network device and transmitted to the terminal device by means of higher layer signaling and/or default values.
And the terminal control center feeds back one ACK/NACK message through the uplink control channel according to the receiving result after receiving the downlink control message sent by the network control center.
Step 102: a time domain location of the transmitted data is determined.
In step 102, the number of symbols indicated by the redundant positions is sequentially shifted backward from the start position up to the time domain position for transmitting data is determined.
As an embodiment of the present application, the terminal data unit determines, according to the downlink control information, a time domain position of the transmission data according to the starting position and the redundant position indication. When the value of K is greater than 0, sequentially shifting backward from the start position up to the number of symbols indicated by the redundant position until it is determined that the time domain position or the backward sequential shifting position available for transmitting data of the uplink data shared channel is equal to the value given by K. When the value of K is equal to 0, the uplink data channel transmission position is the start position or any position after the start position, which satisfies the end of the data transmission at the present time slot.
Step 103: and sending data to the terminal data unit through an uplink data sharing channel.
In step 103, data is sent to the network data unit over the uplink data shared channel for the duration according to the time domain position and the frequency domain position.
It will be understood by those skilled in the art that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (8)
1. A method of communication for an unlicensed channel, comprising the steps of:
transmitting downlink control information through a downlink control channel;
the downlink control information comprises a starting position, a redundant position indication, duration time and a frequency domain position;
the redundant position indication is used for indicating the number of continuous symbols which can be used as a starting position after the starting position in the sending time slot of the uplink data sharing channel;
sequentially moving positions backward within the number of symbols represented by the redundant position indication from the start position, and determining a start time domain position of the uplink data shared channel data;
transmitting data to a network data unit in the duration through an uplink data sharing channel according to the time domain position and the frequency domain position;
within one slot, the starting position to the redundant position indicates that the time domain and frequency domain resources between the most symbol number positions that can be moved are not allocated to different users.
2. The communication method of claim 1, wherein the redundant position indication is for a plurality of time slots.
3. The communication method of claim 1, wherein within one time slot, remaining time and frequency domain resources are allocated to other users in addition to time and frequency domain resources between the starting position and the maximum number of symbol positions that can be moved indicated by the redundant position.
4. The communication method according to claim 1, wherein the redundant position indication is K bits, and K is an integer of 0 or more and 4 or less.
5. The communication method according to claim 4, wherein the K value and the number of representative symbols are set by the network device and transmitted to the terminal device by means of higher layer signaling and/or default values.
6. A network device for implementing the communication method according to any one of claims 1 to 5, characterized by comprising a network data unit and a network control unit;
the network data unit comprises a downlink signal sending module and an uplink signal receiving module;
the network control unit comprises a downlink signaling sending module and an uplink signaling receiving module;
the downlink signal sending module is used for sending data to the terminal equipment through a downlink data sharing channel;
the uplink signal receiving module is used for receiving data through an uplink data sharing channel;
the downlink signaling sending module is used for sending the downlink control information to the terminal equipment through a downlink control channel;
and the uplink signaling receiving module is used for receiving the ACK/NACK information through an uplink control channel.
7. A terminal device for implementing the communication method according to any one of claims 1 to 5, characterized by comprising a terminal data unit and a terminal control unit;
the terminal data unit comprises an uplink signal sending module and a downlink signal receiving module;
the terminal control unit comprises an uplink signaling sending module and a downlink signaling receiving module;
the uplink signal sending module is used for sending data to the network equipment through an uplink data sharing channel;
the downlink signal receiving module is used for receiving data through a downlink data sharing channel;
the uplink signaling sending module is used for sending ACK/NACK information to the network equipment through an uplink control channel;
the downlink signaling receiving module is configured to receive the downlink control information through a downlink control channel.
8. A communication system comprising a network device according to claim 6 and at least one terminal device according to claim 7 connected to the network device.
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| CN201810858309.2A CN110784924B (en) | 2018-07-31 | 2018-07-31 | Network equipment, terminal equipment and communication system and method composed of network equipment and terminal equipment |
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| CN201810858309.2A CN110784924B (en) | 2018-07-31 | 2018-07-31 | Network equipment, terminal equipment and communication system and method composed of network equipment and terminal equipment |
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| CN110784924B true CN110784924B (en) | 2024-02-09 |
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| CN105099634A (en) * | 2014-05-09 | 2015-11-25 | 中兴通讯股份有限公司 | Dynamic resource allocating method and apparatus, base station, terminal |
| CN106992847A (en) * | 2016-01-20 | 2017-07-28 | 中兴通讯股份有限公司 | Upstream data sending, receiving method, device, terminal and base station |
| CN108282879A (en) * | 2017-01-06 | 2018-07-13 | 中兴通讯股份有限公司 | Data transmission method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515741B (en) * | 2014-09-26 | 2020-04-10 | 电信科学技术研究院 | Data transmission method and device on unauthorized frequency band |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099634A (en) * | 2014-05-09 | 2015-11-25 | 中兴通讯股份有限公司 | Dynamic resource allocating method and apparatus, base station, terminal |
| CN106992847A (en) * | 2016-01-20 | 2017-07-28 | 中兴通讯股份有限公司 | Upstream data sending, receiving method, device, terminal and base station |
| CN108282879A (en) * | 2017-01-06 | 2018-07-13 | 中兴通讯股份有限公司 | Data transmission method and device |
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