CN108768598B - Method and device for transmitting downlink control information in ultrahigh-reliability ultralow-time communication - Google Patents
Method and device for transmitting downlink control information in ultrahigh-reliability ultralow-time communication Download PDFInfo
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- CN108768598B CN108768598B CN201810257487.XA CN201810257487A CN108768598B CN 108768598 B CN108768598 B CN 108768598B CN 201810257487 A CN201810257487 A CN 201810257487A CN 108768598 B CN108768598 B CN 108768598B
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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
- H04L5/0055—Physical resource allocation for ACK/NACK
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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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
Abstract
The embodiment of the application provides a method and a device for transmitting downlink control information in ultra-high-reliability and ultra-low-time communication, and belongs to the technical field of communication. The method comprises the following steps: a base station sends downlink control information to user equipment; user equipment receives downlink control information sent by a base station; and the user equipment decodes the downlink control information and feeds back the decoding result of the downlink control information to the base station. If the base station receives a decoding result which is sent by the user equipment and indicates that the downlink control information is decoded correctly, the base station judges that the downlink control information is transmitted successfully; otherwise, sending the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy. The invention can improve the reliability of downlink control information transmission.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting downlink control information in ultra-high reliable ultra-low time communications.
Background
UR LL C (Ultra-Reliable and L ow L inherent Communications, Ultra-Reliable Ultra-low delay Communications) is a communication scenario in wireless communication, and mainly aims at service scenarios with high delay requirements and reliability, specifically including services such as automatic driving, auxiliary driving, industrial automatic control and high-priority key Communications.
The transmission process of data in the conventional UR LL C system is that a base station transmits DCI (Downlink control information), a UE (User Equipment) receives the DCI and transmits/receives a data packet on a time-frequency domain resource indicated by the DCI, a receiving end receives the data and decodes the received data, and feeds back a decoding result, if the UE fails to detect the DCI, the base station repeatedly transmits the DCI according to a preset number of transmission times.
However, when the UE fails to detect the DCI, the base station repeatedly transmits the DCI according to the pre-configured transmission times, and the transmission method of the DCI is not adjusted, if the signal transmission performance on the time-frequency domain resource block for transmitting the DCI is not good, the DCI is transmitted on the time-frequency domain resource block each time, which may cause the failure of the DCI transmission for the next time and also cause the failure of the detection.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method and an apparatus for transmitting downlink control information in ultra-high reliable ultra-low time communication, so as to improve the reliability of DCI transmission. The specific technical scheme is as follows:
in a first aspect, a method for downlink control information transmission in ultra-high reliable ultra-low time communication is provided, where the method is applied to a user equipment, and the method includes:
receiving downlink control information sent by a base station;
and decoding the downlink control information, and feeding back a decoding result of the downlink control information to the base station.
Optionally, after feeding back the decoding result of the downlink control information to the base station, the method further includes:
and if the downlink control information is decoded correctly, transmitting data to the base station or receiving the data transmitted by the base station on the time-frequency domain resource indicated by the downlink control information.
In a second aspect, a method for downlink control information transmission in ultra-high reliable ultra-low time communication is provided, where the method is applied to a base station, and the method includes:
sending downlink control information to user equipment;
if a decoding result which is sent by the user equipment and indicates that the downlink control information is decoded correctly is received, the downlink control information is judged to be transmitted successfully; otherwise, sending the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy.
Optionally, the sending downlink control information to the user equipment again according to a preset downlink control information retransmission policy includes:
and respectively sending downlink control information on a preset number of time-frequency domain resources configured in a control-resource set (CORESET).
Optionally, after the sending the downlink control information again according to the preset downlink control information retransmission policy, the method further includes:
and if the downlink control information is successfully transmitted, transmitting data to the user equipment or receiving the data transmitted by the user equipment on the time-frequency domain resource indicated by the downlink control information.
In a third aspect, an apparatus for downlink control information transmission in ultra-high reliable ultra-low time communication is provided, where the apparatus is applied to a user equipment, and the apparatus includes:
the first transceiver module is used for receiving downlink control information sent by a base station;
a first processing module, configured to decode the downlink control information;
the first transceiver module is further configured to feed back a decoding result of the downlink control information to the base station.
Optionally, the first transceiver module is further configured to:
and if the downlink control information is decoded correctly, transmitting data to the base station or receiving the data transmitted by the base station on the time-frequency domain resource indicated by the downlink control information.
In a fourth aspect, an apparatus for downlink control information transmission in ultra-high reliable ultra-low time communication is provided, where the apparatus is applied to a base station, and the apparatus includes:
the second transceiver module is used for sending downlink control information to the user equipment;
a second processing module, configured to determine that the downlink control information is successfully transmitted if a decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment is received; and if not, triggering the second transceiver module to send the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy.
Optionally, the second processing module is specifically configured to:
and triggering the second transceiver module to respectively send downlink control information on a preset number of time-frequency domain resources configured in a control resource set CORESET.
Optionally, the apparatus further comprises:
and the data transceiver module is used for transmitting data to the user equipment or receiving data transmitted by the user equipment on the time-frequency domain resource indicated by the downlink control information if the downlink control information is successfully transmitted.
The method for transmitting the downlink control information in the ultra-high-reliability ultra-low-time communication provided by the embodiment of the invention can decode DCI immediately after the user equipment receives the DCI, and feed back the decoding result to the base station, if the base station does not receive the feedback that the DCI is decoded correctly, a plurality of time-frequency domain resources are configured in the CORESET to repeatedly transmit the DCI at a higher aggregation level, so that the code rate for transmitting the DCI is reduced, the diversity of the DCI on a time domain and/or a frequency domain is well realized, the UE is enabled to receive the DCI more easily, and the reliability of DCI transmission is effectively improved.
Of course, it is not necessary for any product or method of the present application to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for transmitting downlink control information in ultra-high-reliability ultra-low-time communication according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a short-granularity-scheduling downlink data transmission according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a short-granularity-scheduling downlink data transmission according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a long scheduling granularity downlink data transmission according to an embodiment of the present invention;
fig. 5 is a schematic diagram of uplink data transmission with long scheduling delay according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for transmitting downlink control information in ultra-high-reliability ultra-low-time communication according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an apparatus for transmitting downlink control information in ultra-high-reliability ultra-low-time communication according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a server according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The embodiment of the invention also provides a method for transmitting the downlink control information in the ultra-high reliable ultra-low time communication, which can be realized by the user equipment and the server together. As shown in fig. 1, the method may include the steps of:
In implementation, when the base station needs to send data to the user equipment or the base station needs the user equipment to send data to the base station, the base station allocates a time-frequency domain resource for transmitting data to the user equipment, then generates downlink control information according to the time-frequency domain resource allocated to the user equipment, and further sends the downlink control information to the user equipment.
And 103, the user equipment decodes the downlink control information and feeds back a decoding result of the downlink control information to the base station.
In implementation, the ue decodes the received downlink control information, determines whether the downlink control information is decoded correctly, obtains a decoding result of the downlink control information, and feeds back the decoding result to the base station. For example, the ue may perform CRC (Cyclic Redundancy Check) Check on the received downlink control information to obtain a downlink control information decoding result. Feeding back an ACK (Acknowledgement) signal to the base station if the decoding is correct; if the decoding is erroneous, a NACK (Not-acknowledgement) signal is fed back to the base station.
In this way, the base station can be enabled to determine whether the transmission of the downlink control information is successful or not, so as to perform corresponding processing.
Optionally, after the user equipment feeds back the decoding result of the downlink control information to the base station, if the downlink control information is decoded correctly, the user equipment sends data to the base station or receives data sent by the base station on the time-frequency domain resource indicated by the downlink control information.
In implementation, if the downlink control information is decoded correctly, the ue determines, according to the content of the downlink control information, time-frequency domain resources for receiving data or transmitting data, and receives data transmitted by the base station on the time-frequency domain resources for receiving data or transmits data to the base station on the time-frequency domain resources for transmitting data.
Optionally, for the case that the user equipment receives the data sent by the base station, after the user equipment decodes the data sent by the base station, the decoding result may be fed back to the base station.
In implementation, the user equipment receives data sent by the base station, decodes the data sent by the base station, and feeds back an ACK signal to the base station if the decoding is correct; if the decoding is erroneous, a NACK signal is fed back to the base station.
104, if the base station receives a decoding result which is sent by the user equipment and indicates that the downlink control information is decoded correctly, the base station judges that the downlink control information is transmitted successfully; otherwise, sending the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy.
In implementation, the base station starts timing after sending the downlink control information, and if the base station does not receive the decoding result of the downlink control information within a preset time length after the base station sends the downlink control information, indicating that the transmission of the downlink control information fails, the base station sends the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy. If the base station receives the decoding result of the downlink control information and the decoding result indicates that the downlink control information is decoded incorrectly within the preset time length after the base station sends the downlink control information, the transmission of the downlink control information fails, and the base station sends the downlink control information to the user equipment again according to the preset downlink control information retransmission strategy. And if the base station receives the decoding result of the downlink control information within the preset time length after the base station sends the downlink control information and the decoding result indicates that the downlink control information is decoded correctly, judging that the downlink control information is transmitted successfully.
Therefore, the base station can rapidly determine whether the downlink control information is successfully transmitted according to the decoding result of the downlink control information. If the transmission of the downlink control information fails, the current downlink control information sending mode can be adjusted, the success possibility of the transmission of the downlink control information is increased, and the reliability of the transmission of the downlink control information can be effectively improved.
Optionally, according to a preset downlink control information retransmission policy, the specific processing of sending the downlink control information to the user equipment again may be: the base station respectively sends downlink control information on a preset number of time-frequency domain resources configured in a control resource set CORESET.
In the implementation, the base station adjusts the downlink control information transmission mode according to the current downlink control information transmission mode, and configures a plurality of time-frequency domain resources inside the CORESET, for example, configures a plurality of time-domain resources inside the CORESET, or configures a plurality of frequency domain resources inside the CORESET, or configures a plurality of time-domain resources and a plurality of frequency domain resources inside the CORESET, and transmits the downlink control information on the time-frequency domain resources configured inside the CORESET.
Therefore, the downlink control information is respectively sent in a repeated mode at a higher aggregation level on a plurality of time-frequency domains configured in the CORESET, so that the code rate for sending the downlink control information is reduced, the user equipment can more easily receive the downlink control information, and the reliability of downlink control information transmission can be effectively improved.
Optionally, after sending downlink control information to the user equipment again according to a preset downlink control information retransmission policy, if the transmission of the downlink control information is successful, the base station sends data to the user equipment or receives data sent by the user equipment on a time-frequency domain resource indicated by the downlink control information.
In implementation, if the downlink control information is successfully transmitted, the base station determines, according to the content of the downlink control information, a time-frequency domain resource for receiving data or transmitting data, and receives data transmitted by the base station on the time-frequency domain resource for receiving data or transmits data to the base station on the time-frequency domain resource for transmitting data.
For different scenarios in UR LL C system, the specific embodiment of the present invention is applied as follows:
scene 1: under the scene of short-scheduling-granularity downlink data transmission, the specific process of the scheme is as follows:
the short scheduling granularity refers to that the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols occupied by downlink data scheduled by the downlink control information is less than or equal to 2.
A base station sends downlink control information to user equipment; the user equipment receives the downlink control information and decodes the downlink control information, and if the downlink control information is decoded successfully, an ACK signal is fed back to the base station; if the decoding of the downlink control information fails, feeding back a NACK signal to the base station; if the base station receives the ACK signal, it considers that the user equipment successfully decodes the downlink control information, and sends the downlink control information and data according to the previous configuration, as shown in fig. 2. If the base station does not receive ACK/NACK or receives NACK, it is considered that the user equipment has missed detecting the downlink control information, and a plurality of time-frequency domain resources are configured inside the CORESET to repeatedly send the downlink control information, as shown in fig. 3.
Scene 2: under the scene of long scheduling granularity downlink data transmission, the specific process of the scheme is as follows:
the long scheduling granularity refers to that the number of OFDM symbols occupied by downlink data scheduled by the downlink control information is greater than or equal to 3.
A base station sends downlink control information to user equipment; the user equipment receives the downlink control information and decodes the downlink control information; if the downlink control information is successfully decoded, an ACK signal is fed back to the base station; if the decoding of the downlink control information fails, feeding back a NACK signal to the base station; if the base station receives the ACK signal for the first time, the user equipment is considered to successfully decode the downlink control information, and the downlink control information and the data are sent according to the previous configuration; the user equipment receives the data sent by the base station and decodes the received data, and if the data decoding is successful, an ACK signal is fed back to the base station; if the data decoding fails, feeding back a NACK signal to the base station; if the base station receives the ACK for the second time, it considers that the UE successfully decodes the data, thereby terminating the data transmission. If the base station does not receive ACK/NACK or receives NACK, it is determined that the ue has missed detecting the downlink control information, and the base station configures multiple time-frequency domain resources in the CORESET to repeatedly send the downlink control information, as shown in fig. 4.
Scene 3: under the scene of long scheduling delay uplink data transmission, the specific process of the scheme is as follows:
the long scheduling delay refers to that the time difference between the downlink control information sent by the base station and the corresponding data sent by the user equipment is greater than or equal to 3 OFDM symbols.
A base station sends downlink control information to user equipment; the user equipment receives the downlink control information and decodes the downlink control information; if the downlink control information is successfully decoded, an ACK signal is fed back to the base station; if the decoding of the downlink control information fails, feeding back a NACK signal to the base station; if the base station receives the ACK signal, the user equipment is considered to successfully decode the downlink control information, and the base station does not transmit the downlink control information any more; if the base station does not receive ACK/NACK or receives NACK, the base station considers that the user equipment fails to detect the downlink control information, and the base station repeatedly sends the downlink control information. As shown in fig. 5, the time difference between when the base station sends the downlink control information and when the user equipment sends the corresponding data is 4 OFDM symbols, and the user equipment fails to decode the first downlink control information and quickly feeds back a NACK signal to the base station; a base station receives a NACK signal, and configures a plurality of time-frequency domain resources in a CORESET control resource set to repeatedly send downlink control information when the next OFDM symbol, namely the 4 th OFDM symbol when the NACK signal is received; the user equipment receives the downlink control information sent by the base station again and decodes the downlink control information; the user equipment successfully decodes the downlink control information at this time and feeds back an ACK signal to the base station; the base station receives the ACK number and terminates the repeated sending of the downlink control information; then, the user equipment transmits data to the base station on the time-frequency domain resource indicated by the downlink control information.
Based on the same technical concept, as shown in fig. 6, an embodiment of the present invention further provides an apparatus for transmitting downlink control information in ultra-high-reliability ultra-low-time communication, where the apparatus is applied to a user equipment, and the apparatus includes:
a first transceiver module 601, configured to receive downlink control information sent by a base station;
a first processing module 602, configured to decode the downlink control information;
the first transceiver module is further configured to feed back a decoding result of the downlink control information to the base station.
Optionally, the first transceiver module is further configured to:
and if the downlink control information is decoded correctly, transmitting data to the base station or receiving the data transmitted by the base station on the time-frequency domain resource indicated by the downlink control information.
Based on the same technical concept, as shown in fig. 7, an embodiment of the present invention further provides an apparatus for transmitting downlink control information in ultra-high reliable ultra-low time communication, where the apparatus is applied to a base station, and the apparatus includes:
a second transceiver module 701, configured to send downlink control information to the ue;
a second processing module 702, configured to determine that the downlink control information is successfully transmitted if a decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment is received; and if not, triggering the second transceiver module to send the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy.
Optionally, the second processing module is specifically configured to:
and triggering the second transceiver module to respectively send the downlink control information on a preset number of time-frequency domain resources configured in a control resource set CORESET.
Optionally, the apparatus further comprises:
and the data transceiver module is used for transmitting data to the user equipment or receiving data transmitted by the user equipment on the time-frequency domain resource indicated by the downlink control information if the downlink control information is successfully transmitted.
The embodiment of the present invention further provides a terminal, as shown in fig. 8, including a processor 901, a communication interface 802, a memory 803 and a communication bus 804, where the processor 801, the communication interface 802 and the memory 803 complete mutual communication through the communication bus 804;
a memory 803 for storing a computer program;
a processor 801, configured to execute the program stored in the memory 803, so as to enable the terminal to perform the following steps, including:
receiving downlink control information sent by a base station;
and decoding the downlink control information, and feeding back a decoding result of the downlink control information to the base station.
Optionally, after feeding back the decoding result of the downlink control information to the base station, the method further includes:
and if the downlink control information is decoded correctly, transmitting data to the base station or receiving the data transmitted by the base station on the time-frequency domain resource indicated by the downlink control information.
The embodiment of the present invention further provides a server, as shown in fig. 9, including a processor 901, a communication interface 902, a memory 903 and a communication bus 904, where the processor 901, the communication interface 902, and the memory 903 complete mutual communication through the communication bus 904;
a memory 903 for storing computer programs;
a processor 901, configured to execute the program stored in the memory 903, so as to enable the server to execute the following steps, where the steps include:
sending downlink control information to user equipment;
if a decoding result which is sent by the user equipment and indicates that the downlink control information is decoded correctly is received, the downlink control information is judged to be transmitted successfully; otherwise, sending the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy.
Optionally, the sending downlink control information to the user equipment again according to a preset downlink control information retransmission policy includes:
and respectively sending downlink control information on a preset number of time-frequency domain resources configured in the control resource set CORESET.
Optionally, after sending the downlink control information to the user equipment again according to the preset downlink control information retransmission policy, the method further includes:
and if the downlink control information is successfully transmitted, transmitting data to the user equipment or receiving the data transmitted by the user equipment on the time-frequency domain resource indicated by the downlink control information.
The machine-readable storage medium may include a RAM (Random Access Memory) and may also include a NVM (Non-Volatile Memory), such as at least one disk Memory. Additionally, the machine-readable storage medium may be at least one memory device located remotely from the aforementioned processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also a DSP (Digital Signal Processing), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The method for transmitting the downlink control information in the ultra-high-reliability ultra-low-time communication provided by the embodiment of the invention can decode the downlink control information immediately after the user equipment receives the downlink control information, and feed back the decoding result to the base station, if the base station does not receive the feedback that the downlink control information is decoded correctly, a plurality of time-frequency domain resources are configured in the control resource set CORESET to repeatedly transmit the downlink control information at a higher aggregation level, so that the code rate for transmitting the downlink control information is reduced, the user equipment can receive the downlink control information more easily, and the reliability of downlink control information transmission can be effectively improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. A method for downlink control information transmission in ultra-high reliability ultra-low time communication is characterized in that the method is applied to a base station, and the method comprises the following steps:
sending downlink control information to user equipment;
if a decoding result which is sent by the user equipment and indicates that the downlink control information is decoded correctly is received, the downlink control information is judged to be transmitted successfully; otherwise, sending the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy;
wherein, according to a preset downlink control information retransmission strategy, sending downlink control information to the user equipment again comprises:
and respectively sending downlink control information on a preset number of time-frequency domain resources configured in the control resource set CORESET.
2. The method of claim 1, wherein after the sending the downlink control information to the user equipment again according to a preset downlink control information retransmission policy, the method further comprises:
and if the downlink control information is successfully transmitted, transmitting data to the user equipment or receiving the data transmitted by the user equipment on the time-frequency domain resource indicated by the downlink control information.
3. An apparatus for downlink control information transmission in ultra-high reliability ultra-low time communication, the apparatus being applied to a base station, the apparatus comprising:
the second transceiver module is used for sending downlink control information to the user equipment;
a second processing module, configured to determine that the downlink control information is successfully transmitted if a decoding result indicating that the downlink control information is correctly decoded and sent by the user equipment is received; otherwise, triggering the second transceiver module to send the downlink control information to the user equipment again according to a preset downlink control information retransmission strategy;
wherein the second processing module is specifically configured to:
and triggering the second transceiver module to respectively send downlink control information on a preset number of time-frequency domain resources configured in a control resource set CORESET.
4. The apparatus of claim 3, further comprising:
and the data transceiver module is used for transmitting data to the user equipment or receiving data transmitted by the user equipment on the time-frequency domain resource indicated by the downlink control information if the downlink control information is successfully transmitted.
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| CN101414901A (en) * | 2007-10-16 | 2009-04-22 | 大唐移动通信设备有限公司 | Control method, system and equipment for down data link of TDD HSDPA system |
| CN101568153A (en) * | 2008-04-23 | 2009-10-28 | 大唐移动通信设备有限公司 | Method and device for transmitting small packet services in real time |
| CN102804868A (en) * | 2009-06-16 | 2012-11-28 | 夏普株式会社 | Mobile station device, base station device, radio communication method and communication program |
| WO2017172488A1 (en) * | 2016-04-01 | 2017-10-05 | Motorola Mobility Llc | Method and apparatus for scheduling uplink transmissions with reduced latency |
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