CN110650536B - Method for indicating reception of acknowledgement message frame and method for receiving acknowledgement message frame - Google Patents
Method for indicating reception of acknowledgement message frame and method for receiving acknowledgement message frame Download PDFInfo
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- CN110650536B CN110650536B CN201810668795.1A CN201810668795A CN110650536B CN 110650536 B CN110650536 B CN 110650536B CN 201810668795 A CN201810668795 A CN 201810668795A CN 110650536 B CN110650536 B CN 110650536B
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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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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a method and a device for indicating the reception of an acknowledgement message frame, a method and a device for receiving the acknowledgement message frame and communication equipment. Wherein the method for indicating the reception of the acknowledgement message frame comprises: configuring the receiving time point information of the confirmation message frame of the data frame in the downlink control information; and in the unlicensed frequency band, sending downlink control information to the terminal so that the terminal receives the confirmation message frame according to the receiving time point information. By adopting the technical scheme of the invention, the interference of Wi-Fi equipment or other high-frequency working equipment on a HARQ mechanism is reduced, the data can be ensured to be correctly confirmed, the utilization efficiency of frequency spectrum is improved, and the power saving of unauthorized frequency spectrum terminal equipment is facilitated.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for indicating reception of an acknowledgment message frame, a method and an apparatus for receiving an acknowledgment message frame, and a communication device.
Background
Currently, development work of a 5 th generation mobile communication system (5G) is actively underway. According to the future application requirements, the 5G system needs to support a variety of service scenarios, including Enhanced Mobile Broadband (eMBB), ultra-reliable and Low Latency Communication (URLLC), and mass Machine Communication (MMTC), wherein in the eMBB application scenario, due to limited resources of the licensed spectrum, an unlicensed spectrum (NR-U), such as a 60GHz spectrum, is used, which has the advantages that the transmission bandwidth is wide enough to transmit a large amount of data in a short time, and in the 60GHz spectrum, other Wireless Communications, such as Wi-Fi (Wireless Fidelity, wireless Broadband), exist. In the NR-U, an Acknowledgement mechanism of HARQ (Hybrid Automatic Repeat request) is adopted for a data Frame, while in the Wi-Fi technology, a collision random backoff mechanism is adopted, and after a Short Inter-Frame Space (SIFS) of the data Frame is transmitted, a receiver of the data Frame sends an ACK (Acknowledgement) after the data Frame is acknowledged.
After the NR-U device finishes transmitting data, according to the existing mechanism, the gNB (5G base station) may specify, for the device, a unique time interval for receiving an acknowledgment message frame of a data frame, but when a Wi-Fi device supporting 60GHz exists in a network, interference may be caused to an HARQ mechanism of the NR-U device, so that the NR-U device cannot know whether a receiver of the data frame has correctly received the data, and according to the existing mechanism, the device retransmits the data frame after timeout, but the data frame is completely received by the receiver, and only the acknowledgment message frame is not received, and if the retransmission is performed, the result is: (1) inefficient use of spectrum; (2) The data volume transmitted by the device is large, which is not beneficial to saving electricity of the device. The HARQ mechanism of NR-U needs to be redefined.
Disclosure of Invention
The present invention has been made to solve at least one of the problems occurring in the prior art or the related art.
To this end, an aspect of the present invention is to propose a method for indicating the reception of an acknowledgement message frame.
Another aspect of the present invention is to provide a method of receiving an acknowledgment message frame.
Yet another aspect of the present invention is directed to an apparatus for indicating an acknowledgment message frame receipt.
Yet another aspect of the present invention is to provide an apparatus for receiving an acknowledgment message frame.
Yet another aspect of the present invention is to provide a communication device.
In view of the above, according to an aspect of the present invention, there is provided a method for indicating reception of an acknowledgment message frame, applied to a base station, the method including: configuring the receiving time point information of the confirmation message frame of the data frame in the downlink control information; and in the unlicensed frequency band, sending downlink control information to the terminal so that the terminal receives the confirmation message frame according to the receiving time point information.
In the method for indicating the reception of the acknowledgement message frame provided by the present invention, the base station configures, in DCI (Downlink Control Information), reception time point Information (which may be one or more reception time points) of the acknowledgement message frame for acknowledging the data frame, and transmits the DCI to the terminal in the unlicensed frequency band, so that the terminal can receive the acknowledgement message frame according to the reception time point Information. By adopting the technical scheme of the invention, the interference of Wi-Fi equipment or other high-frequency working equipment on the HARQ mechanism is reduced, the data can be ensured to be correctly confirmed, the utilization efficiency of frequency spectrum is improved, and the power saving of unauthorized frequency spectrum terminal equipment is facilitated.
The unlicensed Frequency band includes 28GHz, 45GHz, 60GHz, and the like, which belong to a Frequency Range 2,fr2 (Frequency Range) defined in 3GPP (3 rd Generation Partnership Project).
The method for indicating the reception of the acknowledgement message frame according to the present invention may further have the following technical features:
in the foregoing technical solution, preferably, the downlink control information further includes a conversion delay from the unlicensed frequency band to the licensed frequency band.
In the technical solution, the DCI further includes a transition delay for converting from the unlicensed frequency band to the licensed frequency band, and the transition delay is sent to the terminal, so that the terminal can accurately convert from the unlicensed frequency band to the licensed frequency band according to the transition delay, and the terminal is ensured to correctly obtain the receiving time point information, where the transition delay is in the order of milliseconds, for example, 10 milliseconds, and the terminal in the unlicensed frequency band is also in an RRC _ connected (radio resource control signaling connection) state in the licensed frequency band.
In any of the above technical solutions, preferably, the base station and the terminal are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In the technical scheme, the base station and the terminal need to maintain the same set of clock in the authorized spectrum and the unauthorized spectrum, so that the base station and the terminal can synchronize time, the terminal is ensured to correctly acquire the information of the receiving time point, and the confirmation data is ensured to be correctly received.
In any of the above technical solutions, preferably, the receiving time point information is one or more orthogonal frequency division multiplexing symbols.
In the technical solution, the receiving time point information is one or more Orthogonal Frequency Division Multiplexing symbols, that is, the receiving time point corresponds to one or more Orthogonal Frequency Division Multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM (Orthogonal Frequency Division Multiplexing) symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the licensed spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the licensed spectrum, for example, the carrier length is 30KHz and the like.
According to another aspect of the present invention, a method for receiving an acknowledgement message frame is provided, which is applied to a terminal, and includes: receiving downlink control information in an unlicensed frequency band; demodulating the downlink control information to obtain the receiving time point information of the confirmation message frame of the data frame; and receiving the confirmation message frame according to the receiving time point information.
According to the method for receiving the acknowledgement message frame provided by the invention, the terminal receives the DCI in the unauthorized frequency band and demodulates the DCI, so that the receiving time point information (which can be one or more receiving time points) of the acknowledgement message frame for acknowledging the data frame is obtained. Further, the terminal receives an acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of the communication of Wi-Fi equipment or other high-frequency working equipment on a terminal HARQ mechanism is reduced, so that the terminal can know whether a receiver of a data frame correctly receives the data in time, and the problems of low spectrum utilization efficiency, terminal power consumption and the like caused by overtime retransmission are avoided.
The unlicensed Frequency bands include Frequency bands of 28GHz, 45GHz, 60GHz, and the like, that is, frequency ranges 2,fr2 (Frequency Range) defined in 3 GPP.
The method for receiving the acknowledgement message frame according to the present invention may further include the following technical features:
in the above technical solution, preferably, after demodulating the downlink control information, the method further includes: and acquiring the conversion delay from the unlicensed frequency band to the licensed frequency band.
In the technical scheme, the DCI further includes a transition delay for transitioning from the unlicensed frequency band to the licensed frequency band, and when the terminal demodulates the DCI, the terminal not only acquires the reception time point information but also acquires the transition delay, so that the terminal can accurately transition from the unlicensed frequency band to the licensed frequency band according to the transition delay, thereby ensuring correct acquisition of the reception time point information, where the transition delay is in the order of milliseconds, such as 10 milliseconds, and the terminal in the unlicensed frequency band is also in the RRC _ connected state in the licensed frequency band.
In any of the above technical solutions, preferably, the terminal and the base station are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In the technical scheme, the terminal and the base station need to maintain the same set of clock in the authorized spectrum and the unauthorized spectrum, so that the terminal and the base station can synchronize time, the correct acquisition of the information of the receiving time point by the terminal is ensured, and the confirmation data is ensured to be correctly received.
In any of the above technical solutions, preferably, the receiving time point information is one or more orthogonal frequency division multiplexing symbols.
In this technical solution, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the authorized spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the authorized spectrum, for example, the carrier length is 30 KHz.
According to another aspect of the present invention, an apparatus for indicating the reception of an acknowledgment message frame is provided, which is applied to a base station, and includes: a configuration module, configured to configure, in the downlink control information, reception time point information of a confirmation message frame of the data frame; and the sending module is used for sending downlink control information to the terminal in the unlicensed frequency band so that the terminal receives the confirmation message frame according to the receiving time point information.
In the device for indicating the reception of the acknowledgement message frame, provided by the invention, the base station configures reception time point information (which may be one or more reception time points) of the acknowledgement message frame for acknowledging the data frame in the DCI, and sends the DCI to the terminal in the unlicensed frequency band, so that the terminal can receive the acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of Wi-Fi equipment or other high-frequency working equipment on the HARQ mechanism is reduced, the data can be ensured to be correctly confirmed, the utilization efficiency of frequency spectrum is improved, and the power saving of unauthorized frequency spectrum terminal equipment is facilitated.
The unlicensed Frequency band includes 28GHz, 45GHz, 60GHz, and other Frequency bands, that is, frequency Range 2,fr2 (Frequency Range) defined in 3 GPP.
The above apparatus for indicating the reception of the acknowledgement message frame according to the present invention may further have the following technical features:
in the foregoing technical solution, preferably, the downlink control information further includes a conversion delay from the unlicensed frequency band to the licensed frequency band.
In the technical solution, the DCI further includes a transition delay for converting from the unlicensed frequency band to the licensed frequency band, and the transition delay is sent to the terminal, so that the terminal can accurately convert from the unlicensed frequency band to the licensed frequency band according to the transition delay, and the terminal is ensured to correctly obtain the receiving time point information, where the transition delay is in the order of milliseconds, for example, 10 milliseconds, and the terminal in the unlicensed frequency band is also in an RRC _ connected state in the licensed frequency band.
In any of the above technical solutions, preferably, the base station and the terminal are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In the technical scheme, the base station and the terminal need to maintain the same set of clock in the authorized spectrum and the unauthorized spectrum, so that the base station and the terminal can synchronize time, the terminal is ensured to correctly acquire the information of the receiving time point, and the confirmation data is ensured to be correctly received.
In any of the above technical solutions, preferably, the receiving time point information is one or more orthogonal frequency division multiplexing symbols.
In this technical solution, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the authorized spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the authorized spectrum, for example, the carrier length is 30 KHz.
According to another aspect of the present invention, an apparatus for receiving an acknowledgment message frame is provided, which is applied to a terminal, and includes: a receiving module, configured to receive downlink control information in an unlicensed frequency band; the acquisition module is used for demodulating the downlink control information and acquiring the receiving time point information of the confirmation message frame of the data frame; and the receiving module is also used for receiving the confirmation message frame according to the receiving time point information.
According to the receiving device for the confirmation message frame provided by the invention, the terminal receives the DCI in the unauthorized frequency band and demodulates the DCI, so that the receiving time point information (which can be one or more receiving time points) of the confirmation message frame for confirming the data frame is obtained. Further, the terminal receives an acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of the communication of Wi-Fi equipment or other high-frequency working equipment on a terminal HARQ mechanism is reduced, so that the terminal can know whether a receiver of a data frame correctly receives the data in time, and the problems of low spectrum utilization efficiency, terminal power consumption and the like caused by overtime retransmission are avoided.
The unlicensed Frequency bands include Frequency bands of 28GHz, 45GHz, 60GHz, and the like, that is, frequency ranges 2,fr2 (Frequency Range) defined in 3 GPP.
The receiving device of the acknowledgement message frame according to the present invention may further have the following technical features:
in the above technical solution, preferably, the obtaining module is further configured to obtain a conversion delay from an unlicensed frequency band to an licensed frequency band.
In the technical scheme, the DCI further includes a transition delay for transitioning from the unlicensed frequency band to the licensed frequency band, and when the terminal demodulates the DCI, the terminal not only acquires the reception time point information but also acquires the transition delay, so that the terminal can accurately transition from the unlicensed frequency band to the licensed frequency band according to the transition delay, thereby ensuring correct acquisition of the reception time point information, where the transition delay is in the order of milliseconds, such as 10 milliseconds, and the terminal in the unlicensed frequency band is also in the RRC _ connected state in the licensed frequency band.
In any of the above technical solutions, preferably, the terminal and the base station are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In the technical scheme, the terminal and the base station need to maintain the same set of clock in the authorized spectrum and the unauthorized spectrum, so that the terminal and the base station can synchronize time, the correct acquisition of the information of the receiving time point by the terminal is ensured, and the confirmation data is ensured to be correctly received.
In any of the above technical solutions, preferably, the receiving time point information is one or more orthogonal frequency division multiplexing symbols.
In this technical solution, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the licensed spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the licensed spectrum, for example, the carrier length is 30 KHz.
According to yet another aspect of the present invention, a communication device is proposed, comprising any one of the above-mentioned means for indicating the reception of an acknowledgement message frame; or a receiving device including any of the above acknowledgement message frames.
The communication device provided by the invention comprises a device for indicating the reception of the acknowledgement message frame according to any one of the above technical schemes; or the device for receiving an acknowledgment message frame according to any of the above embodiments, may be configured to achieve all the advantages of the device for indicating the receipt of an acknowledgment message frame according to any of the above embodiments, or to achieve all the advantages of the device for receiving an acknowledgment message frame according to any of the above embodiments.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 illustrates a flow diagram of a method for indicating receipt of an acknowledgment message frame according to one embodiment of the invention;
fig. 2 shows a flow chart of a method of receiving an acknowledgement message frame according to an embodiment of the invention;
fig. 3 is a diagram illustrating an apparatus for indicating acknowledgment message frame receipt according to an embodiment of the present invention;
fig. 4 is a diagram illustrating an apparatus for receiving an acknowledgment message frame according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 1 is a flowchart illustrating a method for indicating the reception of an acknowledgment message frame according to an embodiment of the present invention. Wherein, the method comprises the following steps:
102, configuring the receiving time point information of the confirmation message frame of the data frame in the downlink control information;
and 104, sending downlink control information to the terminal in the unlicensed frequency band, so that the terminal receives the confirmation message frame according to the receiving time point information.
In the method for indicating the reception of the acknowledgement message frame provided by the invention, the base station configures the reception time point information (which may be one or more reception time points) of the acknowledgement message frame for acknowledging the data frame in the DCI, and sends the DCI to the terminal in the unlicensed frequency band, so that the terminal can receive the acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of Wi-Fi equipment or other high-frequency working equipment on a HARQ mechanism is reduced, the data can be ensured to be correctly confirmed, the utilization efficiency of frequency spectrum is improved, and the power saving of unauthorized frequency spectrum terminal equipment is facilitated.
It should be noted that the unlicensed Frequency band includes 28GHz, 45GHz, 60GHz, etc., that is, frequency Range 2,fr2 (Frequency Range) defined in 3 GPP. The receiving time point information of the acknowledgement message frame configured by the base station for the terminal may be located in the authorized frequency band or the unauthorized frequency band, or a part of the receiving time points may be located in the authorized frequency band and another part of the receiving time points may be located in the unauthorized frequency band. That is, the terminal may receive the acknowledgment message frame according to the reception time point information in the licensed frequency band or the unlicensed frequency band.
In an embodiment of the present invention, preferably, the downlink control information further includes a transition delay for transitioning from the unlicensed frequency band to the licensed frequency band.
In this embodiment, the DCI further includes a transition delay for converting the unlicensed frequency band into the licensed frequency band, and the transition delay is sent to the terminal, so that the terminal can accurately convert the unlicensed frequency band into the licensed frequency band according to the transition delay, thereby ensuring that the terminal correctly obtains the information of the receiving time point, where the transition delay is on the order of milliseconds, such as 10 milliseconds, and the terminal in the unlicensed frequency band is also in an RRC _ connected state in the licensed frequency band.
In one embodiment of the present invention, preferably, the base station and the terminal are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In this embodiment, the base station and the terminal need to maintain the same set of clocks in the licensed spectrum and the unlicensed spectrum, so that the base station and the terminal can synchronize time, and the terminal is ensured to correctly acquire the receiving time point information, thereby ensuring that the confirmation data is correctly received.
In one embodiment of the present invention, preferably, the reception time point information is one or more orthogonal frequency division multiplexing symbols.
In this embodiment, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the licensed spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the licensed spectrum, for example, the carrier length is 30 KHz.
Fig. 2 is a schematic flow chart of the method for receiving an acknowledgment message frame according to an embodiment of the present invention. Wherein, the method comprises the following steps:
According to the method for receiving the acknowledgement message frame provided by the invention, the terminal receives the DCI in the unauthorized frequency band and demodulates the DCI, so that the receiving time point information (which can be one or more receiving time points) of the acknowledgement message frame for acknowledging the data frame is obtained. Further, the terminal receives an acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of the communication of Wi-Fi equipment or other high-frequency working equipment on a terminal HARQ mechanism is reduced, so that the terminal can know whether a receiver of a data frame correctly receives the data in time, and the problems of low spectrum utilization efficiency, terminal power consumption and the like caused by overtime retransmission are avoided.
It should be noted that the unlicensed Frequency band includes 28GHz, 45GHz, 60GHz, etc., that is, frequency Range 2,fr2 (Frequency Range) defined in 3 GPP. The terminal may receive the acknowledgement message frame according to the reception time point information in the licensed band or the unlicensed band.
In one embodiment of the present invention, preferably, after demodulating the downlink control information, the method further includes: and acquiring the conversion time delay for converting the unlicensed frequency band into the licensed frequency band.
In this embodiment, the DCI further includes a transition delay for converting from the unlicensed frequency band to the licensed frequency band, and when the terminal demodulates the DCI, the terminal not only acquires the receiving time point information but also acquires the transition delay, so that the terminal can accurately convert from the unlicensed frequency band to the licensed frequency band according to the transition delay, thereby ensuring correct acquisition of the receiving time point information, where the transition delay is in the order of milliseconds, such as 10 milliseconds, and the terminal in the unlicensed frequency band is also in an RRC _ connected state in the licensed frequency band.
In one embodiment of the present invention, preferably, the terminal and the base station are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In this embodiment, the terminal and the base station need to maintain the same set of clocks in the authorized spectrum and the unauthorized spectrum, so that the terminal and the base station can synchronize time, and the terminal is ensured to correctly acquire the receiving time point information, thereby ensuring that the confirmation data is correctly received.
In one embodiment of the present invention, preferably, the receiving time point information is one or more orthogonal frequency division multiplexing symbols.
In this embodiment, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the authorized spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the authorized spectrum, for example, the carrier length is 30 KHz.
In a third aspect of the present invention, an apparatus for indicating the reception of an acknowledgment message frame is provided, which is applied to a base station, and fig. 3 is a schematic diagram of an apparatus 30 for indicating the reception of an acknowledgment message frame according to an embodiment of the present invention. Wherein the device 30 comprises:
a configuration module 302, configured to configure, in the downlink control information, receiving time point information of an acknowledgment message frame of a data frame;
a sending module 304, configured to send downlink control information to the terminal in the unlicensed frequency band, so that the terminal receives the acknowledgment message frame according to the receiving time point information.
In the apparatus 30 for indicating the reception of the acknowledgement message frame provided by the present invention, the base station configures, in DCI, reception time point information (which may be one or more reception time points) of the acknowledgement message frame for acknowledging the data frame, and transmits the DCI to the terminal in the unlicensed frequency band, so that the terminal can receive the acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of Wi-Fi equipment or other high-frequency working equipment on the HARQ mechanism is reduced, the data can be ensured to be correctly confirmed, the utilization efficiency of frequency spectrum is improved, and the power saving of unauthorized frequency spectrum terminal equipment is facilitated.
It should be noted that the unlicensed Frequency band includes 28GHz, 45GHz, 60GHz, and other Frequency bands, that is, the unlicensed Frequency band belongs to the Frequency Range 2,fr2 (Frequency Range) defined in 3 GPP. The receiving time point information of the acknowledgement message frame configured by the base station for the terminal may be located in the authorized frequency band or the unauthorized frequency band, or a part of the receiving time points may be located in the authorized frequency band and another part of the receiving time points may be located in the unauthorized frequency band. That is, the terminal may receive the acknowledgment message frame according to the reception time point information in the licensed frequency band or the unlicensed frequency band.
In an embodiment of the present invention, preferably, the downlink control information further includes a transition delay for transitioning from the unlicensed frequency band to the licensed frequency band.
In this embodiment, the DCI further includes a transition delay for transitioning from the unlicensed frequency band to the licensed frequency band, and the transition delay is sent to the terminal, so that the terminal can accurately transition from the unlicensed frequency band to the licensed frequency band according to the transition delay, thereby ensuring that the terminal correctly obtains the receiving time point information, where the transition delay is on the order of milliseconds, such as 10 milliseconds, and the terminal in the unlicensed frequency band is also in the RRC _ connected state in the licensed frequency band.
In one embodiment of the present invention, preferably, the base station and the terminal are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In this embodiment, the base station and the terminal need to maintain the same set of clocks in the authorized spectrum and the unauthorized spectrum, so that the base station and the terminal can synchronize time, and the terminal is ensured to correctly acquire the receiving time point information, thereby ensuring that the confirmation data is correctly received.
In one embodiment of the present invention, preferably, the reception time point information is one or more orthogonal frequency division multiplexing symbols.
In this embodiment, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the authorized spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the authorized spectrum, for example, the carrier length is 30 KHz.
Fig. 4 is a schematic diagram of an apparatus 40 for receiving an acknowledgment message frame according to an embodiment of the present invention. Wherein the device 40 comprises:
a receiving module 402, configured to receive downlink control information in an unlicensed frequency band;
an obtaining module 404, configured to demodulate the downlink control information, and obtain receiving time point information of a confirmation message frame of the data frame;
the receiving module 402 is further configured to receive an acknowledgement message frame according to the receiving time point information.
In the device 40 for receiving an acknowledgment message frame provided by the present invention, the terminal receives DCI in the unlicensed frequency band and demodulates the DCI, so as to obtain the reception time point information (which may be one or more reception time points) of the acknowledgment message frame for acknowledging the data frame. Further, the terminal receives an acknowledgement message frame according to the reception time point information. By adopting the technical scheme of the invention, the interference of the communication of Wi-Fi equipment or other high-frequency working equipment on a terminal HARQ mechanism is reduced, so that the terminal can know whether a receiver of a data frame correctly receives the data or not in time, and the problems of low frequency spectrum utilization efficiency, terminal power consumption and the like caused by overtime retransmission are avoided.
It should be noted that the unlicensed Frequency band includes 28GHz, 45GHz, 60GHz, etc., that is, frequency Range 2,fr2 (Frequency Range) defined in 3 GPP. The terminal may receive the acknowledgement message frame according to the reception time point information in the licensed band or the unlicensed band.
In an embodiment of the present invention, preferably, the obtaining module 404 is further configured to obtain a conversion delay for converting from the unlicensed frequency band to the licensed frequency band.
In this embodiment, the DCI further includes a transition delay for converting the unlicensed frequency band into the licensed frequency band, and when the terminal demodulates the DCI, the terminal not only obtains the reception time point information but also obtains the transition delay, so that the terminal can accurately convert the unlicensed frequency band into the licensed frequency band according to the transition delay, thereby ensuring correct obtaining of the reception time point information, where the transition delay is in the order of milliseconds, such as 10 milliseconds, and the terminal in the unlicensed frequency band is also in the RRC _ connected state in the licensed frequency band.
In one embodiment of the present invention, preferably, the terminal and the base station are time-synchronized in the unlicensed frequency band and the licensed frequency band.
In this embodiment, the terminal and the base station need to maintain the same set of clocks in the authorized spectrum and the unauthorized spectrum, so that the terminal and the base station can synchronize time, and the terminal is ensured to correctly acquire the receiving time point information, thereby ensuring that the confirmation data is correctly received.
In one embodiment of the present invention, preferably, the reception time point information is one or more orthogonal frequency division multiplexing symbols.
In this embodiment, the receiving time point information is one or more orthogonal frequency division multiplexing symbols, that is, the receiving time point corresponds to one or more orthogonal frequency division multiplexing symbols, for example, the receiving time point information is defined as 10 OFDM symbols, where the length of the OFDM symbol is the length of the OFDM of the received acknowledgement message frame in the licensed spectrum, where the 10 OFDM symbols refer to the duration of the terminal under a certain carrier length in the licensed spectrum, for example, the carrier length is 30 KHz.
An embodiment of a fifth aspect of the present invention proposes a communication device, including any one of the above-mentioned apparatuses for indicating an acknowledgment message frame reception; or a receiving device comprising an acknowledgement message frame of any of the above.
The communication device provided by the invention comprises the device for indicating the reception of the acknowledgement message frame in any one of the embodiments; or the receiving apparatus including the acknowledgement message frame of any of the above embodiments, can achieve all the advantages of the apparatus for indicating the reception of the acknowledgement message frame of any of the above embodiments, or achieve all the advantages of the receiving apparatus of the acknowledgement message frame of any of the above embodiments.
In the description of the present specification, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless otherwise explicitly stated or defined; the terms "connected", "mounted", "fixed", and the like are to be construed broadly and may include, for example, fixed connections, detachable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for indicating acknowledgment message frame reception, applied to a base station, the method comprising:
configuring the receiving time point information of the confirmation message frame of the data frame in the downlink control information;
in an unlicensed frequency band, sending the downlink control information to a terminal, so that the terminal receives the acknowledgement message frame according to the receiving time point information;
the downlink control information also comprises a conversion time delay for converting the unauthorized frequency band into the authorized frequency band;
and the base station and the terminal are synchronized in time in the unlicensed frequency band and the licensed frequency band.
2. The method for indicating acknowledgment message frame receipt of claim 1 wherein the reception timing point information is one or more orthogonal frequency division multiplexing symbols.
3. A method for receiving an acknowledgment message frame, the method being applied to a terminal, the method comprising:
receiving downlink control information in an unlicensed frequency band;
demodulating the downlink control information to obtain the receiving time point information of the acknowledgement message frame of the data frame;
receiving the confirmation message frame according to the receiving time point information;
after the downlink control information is demodulated, the method further comprises:
acquiring conversion time delay for converting the unauthorized frequency band into the authorized frequency band;
and the terminal and the base station are synchronized in time in the unlicensed frequency band and the licensed frequency band.
4. The method for receiving an acknowledgment message frame of claim 3, wherein the reception time point information is one or more orthogonal frequency division multiplexing symbols.
5. An apparatus for indicating acknowledgement message frame reception, applied to a base station, the apparatus comprising:
a configuration module, configured to configure, in downlink control information, receiving time point information of the acknowledgment message frame of a data frame;
a sending module, configured to send the downlink control information to a terminal in an unlicensed frequency band, so that the terminal receives the acknowledgment message frame according to the reception time point information;
the downlink control information also comprises a conversion time delay for converting the unauthorized frequency band into the authorized frequency band;
and the base station and the terminal are synchronized in time in the unlicensed frequency band and the licensed frequency band.
6. The apparatus of claim 5, wherein the receiver is further configured to receive the acknowledgement message frame,
the receiving time point information is one or more orthogonal frequency division multiplexing symbols.
7. An apparatus for receiving an acknowledgment message frame, the apparatus being applied to a terminal, the apparatus comprising:
a receiving module, configured to receive downlink control information in an unlicensed frequency band;
an obtaining module, configured to demodulate the downlink control information, and obtain receiving time point information of the acknowledgment message frame of the data frame;
the receiving module is further configured to receive the acknowledgment message frame according to the receiving time point information;
the acquisition module is further configured to acquire a conversion delay from the unlicensed frequency band to the licensed frequency band;
and the terminal and the base station are synchronized in time in the unlicensed frequency band and the licensed frequency band.
8. The apparatus for receiving an acknowledgment message frame of claim 7, wherein the reception timing point information is one or more orthogonal frequency division multiplexing symbols.
9. A communication device, comprising:
means for indicating acknowledgement message frame receipt according to claim 5 or 6; or an acknowledgement message frame receiving apparatus according to claim 7 or 8.
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