CN110100494B - Data transmission method and equipment - Google Patents
Data transmission method and equipment Download PDFInfo
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- CN110100494B CN110100494B CN201680091762.4A CN201680091762A CN110100494B CN 110100494 B CN110100494 B CN 110100494B CN 201680091762 A CN201680091762 A CN 201680091762A CN 110100494 B CN110100494 B CN 110100494B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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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
Abstract
The invention discloses a data transmission method and equipment, which are used for solving the problems of discontinuous UE scheduling, limited UE scheduling rate, prolonged UE scheduling time and increased UE power loss caused by insufficient use of an HARQ process. When a base station and a terminal carry out data transmission, the base station determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not; if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a data transmission method and equipment for machine type communication.
Background
Machine to Machine (M2M) is a popular form Of application in the Internet Of Things (IOT). The third Generation Partnership Project (3rd Generation Partnership Project, 3GPP) introduced Machine Type Communication (MTC) technology and Enhanced Machine Type communication (eMTC) technology.
In the prior art, a User Equipment (UE) of eMTC is divided into two coverage modes, mode a (modea) and mode b (modeb).
Under ModeA, eMTC supports a maximum of 8 Hybrid automatic Repeat Request (HARQ) processes.
In the following behavior example, in the nth subframe, an evolved Node B (eNB) issues Downlink Control Information (DCI) by using a machine type communication Physical Downlink Control Channel (MTC Physical Downlink Control Channel, MPDCCH). And the eNB sends data to the UE by utilizing a Physical Downlink Shared Channel (PDSCH) in the n + k subframe, wherein k is more than or equal to 2. In the (n + k + 4) th subframe, the UE transmits a feedback Acknowledgement (ACK)/Negative Acknowledgement (NACK) of the data by using a Physical Uplink Control (PUCCH). The Transmission Time Interval (TTI) is approximately 3 Transmission Time intervals from the Transmission of ACK/NACK through the PUCCH to the eNB for demodulation and processing. Therefore, the maximum number of HARQ processes supported cannot fill the gap of one HARQ process.
For example, the following steps are carried out: and the eNB transmits the DCI to the UE through the MPDCCH in the sub-frame n-0, and transmits data to the UE through the PDSCH in the sub-frame n-2. And the UE fails to decode, and in the sub-frame n-6, the UE transmits NACK information of the data to the eNB through the PUCCH. And the eNB demodulates and processes according to the NACK information. And the eNB schedules the retransmission data according to the downlink resource allocation condition. As shown in fig. 1, the round trip time of one HARQ process requires at least 10 TTIs. The eMTC HARQ adopts a multi-process 'stop-wait' HARQ implementation mode, namely for any HARQ process, before waiting for ACK/NACK feedback, the process temporarily suspends transmission, and after receiving the feedback, new data is selected to be transmitted or retransmitted according to whether the feedback is ACK or NACK. During this time, the eNB/UE of course cannot stop transmission and wait uselessly, and must initiate other parallel HARQ processes to fully utilize the time domain resources. As shown in fig. 2, the number of parallel HARQ processes is related to the round-trip time of one HARQ process, that is, the transmission delay is related to the processing time of the UE/eNB, the larger the round-trip time of the HARQ process is, the more parallel HARQ processes need to be supported to fill up the round-trip time of the HARQ process, the number of parallel HARQ processes needs to be equal to the round-trip time TTI of the HARQ process, but the 3GPP protocol specifies that eMTC supports 8 HARQ processes at maximum under modeA, and the number of 8 HARQ processes cannot fill up the round-trip time of the HARQ process, which causes a problem of insufficient number of processes.
In ModeB, eMTC supports 2 HARQ processes at maximum, and the above problem of insufficient number of processes also occurs.
Due to insufficient use of the HARQ process, UE scheduling is discontinuous, and UE scheduling rate is limited.
Disclosure of Invention
The embodiment of the invention provides a data transmission method and equipment, which can improve the UE scheduling rate.
In a first aspect, a method of data transmission, the method comprising: when a base station and a terminal carry out data transmission, the base station determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not; if the base station determines that the preset number of HARQ processes are all occupied, the base station selects the HARQ process with the longest time interval from the preset number of HARQ processes as a first HARQ process; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal.
In the embodiment of the invention, the base station selects the occupied HARQ for multiplexing, namely, when any HARQ process carries out data transmission with any terminal, the base station can also be used for carrying out data transmission with other terminals, thereby realizing the continuity of UE scheduling and improving the scheduling rate of the UE. Furthermore, by multiplexing the HARQ process, the scheduling time of the UE is reduced, and the power loss of the UE is reduced.
In one possible design, the base station utilizing the first HARQ process for the data transmission with the terminal includes: based on the first HARQ process, the base station sends a data block to the terminal through a physical downlink shared channel; the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, the base station empties the data block.
In the embodiment of the present invention, if the HARQ feedback information is ACK or the first HARQ process reaches the preset maximum retransmission number, the base station clears the data block corresponding to the first HARQ process, and transmits a new data block using the first HARQ process, and clearing the data block ensures that the first HARQ process is a process that can be used again for data transmission.
In one possible design, the base station utilizing the first HARQ process for the data transmission with the terminal based on the first HARQ process includes: the base station sends a data block to the terminal through a downlink physical shared channel; the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is Negative Acknowledgement (NACK), the base station determines whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, the second HARQ process is used for retransmitting the data block. Wherein, the second HARQ process may select any idle HARQ process from a preset number of HARQ processes.
In one possible design, the method further includes: and if the idle second HARQ process does not exist, the base station selects a third HARQ process with the longest time interval from the latest use among the preset number of HARQ processes to retransmit the data block. Wherein the third HARQ process is the same as or different from the first HARQ process.
In one possible design, the base station utilizing the first HARQ process for the data transmission with the terminal based on the first HARQ process includes: the base station receives a data block sent by the terminal through a physical uplink shared channel; and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches the preset maximum retransmission number, the base station clears the cache of the first HARQ process.
In one possible design, the base station utilizing the first HARQ process for the data transmission with the terminal based on the first HARQ process includes: the base station receives a data block sent by the terminal through a physical uplink shared channel; if the base station cannot correctly receive the data block sent by the terminal, the base station determines whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, the base station instructs the terminal to retransmit the data block by using the second HARQ process.
In one possible design, the method further includes: and if the idle second HARQ process does not exist, the base station selects a third HARQ process from the predetermined number of HARQ processes and instructs the terminal to retransmit the data block by using the third HARQ process.
In a second aspect, a base station, the base station comprising: the device comprises a determining module and a judging module, wherein the determining module is used for determining whether the HARQ processes of the hybrid automatic repeat request with the preset number are all occupied when the base station to which the determining module belongs carries out data transmission with a terminal; a selection module, configured to select a first HARQ process from the preset number of HARQ processes if the preset number of HARQ processes are occupied; and the processing module is used for carrying out the data transmission with the terminal by utilizing the first HARQ process.
In the embodiment of the invention, the base station selects the occupied HARQ for multiplexing, namely, when any HARQ process carries out data transmission with any terminal, the base station can also be used for carrying out data transmission with other terminals, thereby realizing the continuity of UE scheduling, improving the UE scheduling rate, reducing the UE scheduling time and reducing the power loss of the UE.
In one possible design, the processing module is specifically configured to: based on the first HARQ process, sending a data block to the terminal through a physical downlink shared channel; receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, clearing the data block.
In one possible design, the processing module is specifically configured to: based on the first HARQ process, sending a data block to the terminal through a downlink physical shared channel; receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is Negative Acknowledgement (NACK), determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, retransmitting the data block by using the second HARQ process.
In one possible design, the processing module is further to: and if the idle second HARQ process does not exist, selecting a third HARQ process from the preset number of HARQ processes to retransmit the data block.
In one possible design, the processing module is specifically configured to: receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process; and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches a preset maximum retransmission number, clearing the cache of the first HARQ process.
In one possible design, the processing module is specifically configured to: receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process; and if the base station cannot correctly receive the data block sent by the terminal, determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, indicating the terminal to use the second HARQ process to retransmit the data block.
In one possible design, the processing module is further to: and if the idle second HARQ process does not exist, selecting a third HARQ process from the predetermined number of HARQ processes, and indicating the terminal to use the third HARQ process to retransmit the data block.
In one possible design, the determining module is specifically configured to: and selecting the HARQ process with the longest time interval from the HARQ processes with the preset number as the first HARQ process.
In one possible design, the determining module is further specifically configured to: and if the idle second HARQ process does not exist, selecting the HARQ process with the longest time interval from the preset number of HARQ processes as a third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
In a third aspect, a base station includes a transceiver, and at least one processor coupled to the transceiver, wherein:
a processor for reading the program in the memory, performing the following processes:
when a base station and a terminal carry out data transmission, the base station determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not; if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal.
In one possible design, the processor is specifically configured to: based on the first HARQ process, sending a data block to the terminal through a physical downlink shared channel; receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, clearing the data block.
In one possible design, the processor is further specifically configured to: based on the first HARQ process, sending a data block to the terminal through a downlink physical shared channel; receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is Negative Acknowledgement (NACK), determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, retransmitting the data block by using the second HARQ process.
In one possible design, the processor is further to: and if the idle second HARQ process does not exist, selecting a third HARQ process from the preset number of HARQ processes to retransmit the data block.
In one possible design, the processor is specifically configured to: receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process; and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches a preset maximum retransmission number, clearing the cache of the first HARQ process.
In one possible design, the processor is specifically configured to: receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process; and if the base station cannot correctly receive the data block sent by the terminal, determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, indicating the terminal to use the second HARQ process to retransmit the data block.
In one possible design, the processor is further specifically configured to: and if the idle second HARQ process does not exist, selecting a third HARQ process from the predetermined number of HARQ processes, and indicating the terminal to use the third HARQ process to retransmit the data block.
In one possible design, the processor is specifically configured to: and selecting the HARQ process with the longest time interval from the HARQ processes with the preset number as the first HARQ process.
In one possible design, the processor is specifically configured to: and if the idle second HARQ process does not exist, selecting the HARQ process with the longest time interval from the preset number of HARQ processes as a third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
The embodiment of the invention provides a data transmission method and equipment, wherein when a base station and a terminal carry out data transmission, the base station determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not; if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal. The base station realizes the continuity of UE scheduling by multiplexing the HARQ process, and improves the UE scheduling rate. Furthermore, by multiplexing the HARQ process, the scheduling time of the UE is reduced, and the power loss of the UE is reduced.
Drawings
Fig. 1 is a schematic diagram of a HARQ process data transmission process according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a multiple HARQ process data transmission process according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another multiple HARQ process data transmission process according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for data transmission according to an embodiment of the present invention;
fig. 5 is a schematic diagram of another data transmission process according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a data transmission apparatus according to an embodiment of the present invention;
fig. 7 is a schematic hardware structure diagram of a data transmission device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto. It is to be understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
An embodiment of the present invention provides a data transmission method, as shown in fig. 4, the method includes the following processes:
s11, when the base station and the terminal transmit data, the base station determines whether the HARQ processes of the preset number are all occupied.
The terminal may be referred to as a user equipment, a mobile station, a mobile terminal, or the like, and may communicate with one or more core Network devices via a Radio Access Network (RAN), for example, the terminal may be a mobile phone (or referred to as a "cellular" phone) or a computer with a mobile terminal, and for example, the terminal may also be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, which exchanges voice and/or data with the RAN.
S12, if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes.
Optionally, the base station selects, from the preset number of HARQ processes, an HARQ process with a longest time interval from the latest use as the first HARQ process.
For example, the following steps are carried out: the base station uses a preset number of HARQ processes to carry out data transmission with the terminal A, the preset number of HARQ processes are all occupied, and when the terminal B needs to carry out data transmission with the base station, the base station selects a first HARQ process from the preset number of HARQ processes to carry out multiplexing. As shown in fig. 5, when 8 HARQ processes are all occupied, if there are two new data blocks to be transmitted, HARQ-0 and HARQ-1 are selected for multiplexing respectively.
S13, the base station utilizes the first HARQ process to carry out the data transmission with the terminal.
In the embodiment of the invention, when a base station and a terminal carry out data transmission, the base station determines whether the HARQ processes with the preset number are all occupied; if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal. The base station realizes the continuity of UE scheduling by multiplexing the HARQ process, and improves the UE scheduling rate. Furthermore, by multiplexing the HARQ process, the scheduling time of the UE is reduced, and the power loss of the UE is reduced.
In S13, the data transmission includes a downlink data transmission and an uplink data transmission.
For downlink data transmission, the base station performs the data transmission with the terminal by using the first HARQ process, specifically: based on the first HARQ process, the base station sends a data block to the terminal through a physical downlink shared channel; the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, the base station empties the data block.
Optionally, based on the first HARQ process, the base station sends a data block to the terminal through a downlink physical shared channel; the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is Negative Acknowledgement (NACK), the base station determines whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, the second HARQ process is used for retransmitting the data block.
Specifically, before the base station sends the Data block to the terminal through the PDSCH, the base station issues DCI to the terminal through MPDCCH, where the DCI carries a New Data Indicator (NDI) value, and when the second HARQ process is used to perform Data block retransmission, the NDI value carried in the DCI is different from the NDI value carried in the DCI sent to the UE by the base station last time.
Optionally, based on the first HARQ process, the base station sends a data block to the terminal through a downlink physical shared channel; the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is Negative Acknowledgement (NACK), if no idle second HARQ process exists, the base station selects a third HARQ process to retransmit the data block in the predetermined number of HARQ processes.
Specifically, the base station selects, as the third HARQ process, an HARQ process having a longest time interval from the latest time use among the preset number of HARQ processes, where the third HARQ process is the same as or different from the first HARQ process. Before the base station sends a data block to the terminal through a PDSCH, the base station sends DCI to the terminal through an MPDCCH, the DCI carries an NDI value, and when the third HARQ process is the same as the first HARQ process, the NDI value carried in the DCI is the same as the NDI value carried in the DCI sent to the UE by the base station last time; and when the third HARQ process is different from the first HARQ process, the NDI value carried in the DCI is different from the NDI value carried in the DCI which is sent to the UE by the base station last time.
For uplink data transmission, the data transmission between the base station and the terminal by using the first HARQ process includes:
based on the first HARQ process, the base station receives a data block sent by the terminal through a physical uplink shared channel; if the base station correctly receives the Data block sent by the terminal or the first HARQ process reaches a preset maximum retransmission number, the base station clears the buffer of the first HARQ process, and optionally, the buffer includes a media Access Control Packet Data Unit (MAC PDU).
Optionally, based on the first HARQ process, the base station receives a data block sent by the terminal through a physical uplink shared channel; if the base station cannot correctly receive the data block sent by the terminal, the base station determines whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, the base station instructs the terminal to retransmit the data block using the second HARQ process, where the incorrect reception includes a data check error or a reception result is Discontinuous Transmission (DTX).
Specifically, before the base station receives the data block sent by the terminal through the PUSCH, the base station issues Uplink Control Information (UCI) to the terminal through the MPDCCH, and when the second HARQ process is used to perform data block retransmission, an NDI value carried in the UCI is different from an NDI value carried in the UCI that is sent to the UE by the base station last time.
Optionally, if there is no idle second HARQ process, the base station selects a third HARQ process from the predetermined number of HARQ processes, and instructs the terminal to retransmit the data block using the third HARQ process. Specifically, if there is no idle second HARQ process, the base station selects, as the third HARQ process, an HARQ process that has a longest time interval from the latest time use among the preset number of HARQ processes, where the third HARQ process is the same as or different from the first HARQ process. Before the base station receives the data block sent by the terminal through a PUSCH, the base station sends UCI to the terminal through an MPDCCH, the UCI carries an NDI value, and when the third HARQ process is the same as the first HARQ process, the NDI value carried in the UCI is the same as the NDI value carried in the UCI sent to the UE by the base station last time; and when the third HARQ process is different from the first HARQ process, the NDI value carried in the UCI is different from the NDI value carried in the UCI which is sent to the UE by the base station last time.
Based on the same inventive concept, an embodiment of the present invention provides a base station, as shown in fig. 6, where the base station includes:
a determining module 61, configured to determine whether a preset number of HARQ processes are occupied when a base station to which the determining module belongs performs data transmission with a terminal;
a selecting module 62, configured to select a first HARQ process from the preset number of HARQ processes if the preset number of HARQ processes are occupied;
a processing module 63, configured to perform the data transmission with the terminal by using the first HARQ process.
The embodiment of the invention provides a base station, which determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not when the base station and a terminal carry out data transmission; if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal. The base station realizes the continuity of UE scheduling by multiplexing the HARQ process, and improves the UE scheduling rate. Furthermore, by multiplexing the HARQ process, the scheduling time of the UE is reduced, and the power loss of the UE is reduced.
Optionally, the processing module is specifically configured to:
based on the first HARQ process, sending a data block to the terminal through a physical downlink shared channel;
receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block;
and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, clearing the data block.
Optionally, the processing module is specifically configured to:
based on the first HARQ process, sending a data block to the terminal through a downlink physical shared channel;
receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block;
and if the HARQ feedback information is Negative Acknowledgement (NACK), determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, retransmitting the data block by using the second HARQ process.
Optionally, the processing module is further configured to:
and if the idle second HARQ process does not exist, selecting a third HARQ process from the preset number of HARQ processes to retransmit the data block.
Optionally, the processing module is specifically configured to:
receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process;
and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches a preset maximum retransmission number, clearing the cache of the first HARQ process.
Optionally, the processing module is specifically configured to:
receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process;
and if the base station cannot correctly receive the data block sent by the terminal, determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, indicating the terminal to use the second HARQ process to retransmit the data block.
Optionally, the processing module is further configured to:
and if the idle second HARQ process does not exist, selecting a third HARQ process from the predetermined number of HARQ processes, and indicating the terminal to use the third HARQ process to retransmit the data block.
Optionally, the determining module is specifically configured to:
and selecting the HARQ process with the longest time interval from the HARQ processes with the preset number as the first HARQ process.
Optionally, the determining module is further specifically configured to:
and if the idle second HARQ process does not exist, selecting the HARQ process with the longest time interval from the preset number of HARQ processes as a third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
In the embodiment of fig. 7, the base station comprises a transceiver 710, and at least one processor 700 connected to the transceiver 710, wherein:
the processor 700, which is used to read the program in the memory 720, executes the following processes:
when a base station and a terminal carry out data transmission, the base station determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not; if the preset number of HARQ processes are occupied, the base station selects a first HARQ process from the preset number of HARQ processes; and the base station utilizes the first HARQ process to carry out the data transmission with the terminal.
Where in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.
Optionally, the processor 700 specifically executes the following processes: based on the first HARQ process, sending a data block to the terminal through a physical downlink shared channel; receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, clearing the data block.
Optionally, the processor 700 is further specifically configured to: based on the first HARQ process, sending a data block to the terminal through a downlink physical shared channel; receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block; and if the HARQ feedback information is Negative Acknowledgement (NACK), determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, retransmitting the data block by using the second HARQ process.
Optionally, the processor 700 is further configured to: and if the idle second HARQ process does not exist, selecting a third HARQ process from the preset number of HARQ processes to retransmit the data block.
Optionally, the processor is specifically configured to: receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process; and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches a preset maximum retransmission number, clearing the cache of the first HARQ process.
Optionally, the processor 700 is specifically configured to: receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process; and if the base station cannot correctly receive the data block sent by the terminal, determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, indicating the terminal to use the second HARQ process to retransmit the data block.
Optionally, the processor 700 is further specifically configured to: and if the idle second HARQ process does not exist, selecting a third HARQ process from the predetermined number of HARQ processes, and indicating the terminal to use the third HARQ process to retransmit the data block.
Optionally, the processor 700 is specifically configured to: and selecting the HARQ process with the longest time interval from the HARQ processes with the preset number as the first HARQ process.
Optionally, the processor 700 is specifically configured to: and if the idle second HARQ process does not exist, selecting the HARQ process with the longest time interval from the preset number of HARQ processes as a third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
It is understood that the processor 700 controls the transceiver 710 to perform air interface information interaction between the base station and the terminal.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (18)
1. A method of data transmission, the method comprising:
when a base station and a terminal carry out data transmission, the base station determines whether a preset number of hybrid automatic repeat request (HARQ) processes are occupied or not;
if the preset number of HARQ processes are occupied, the base station selects an occupied first HARQ process from the preset number of HARQ processes;
and the base station utilizes the first HARQ process to carry out the data transmission with the terminal.
2. The method of claim 1, wherein the base station utilizing the first HARQ process for the data transmission with the terminal comprises:
based on the first HARQ process, the base station sends a data block to the terminal through a physical downlink shared channel;
the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block;
and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, the base station empties the data block.
3. The method of claim 1, wherein the base station utilizing the first HARQ process for the data transmission with the terminal comprises:
based on the first HARQ process, the base station sends a data block to the terminal through a downlink physical shared channel;
the base station receives HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block;
and if the HARQ feedback information is Negative Acknowledgement (NACK), the base station determines whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, the second HARQ process is used for retransmitting the data block.
4. The method of claim 3, wherein the method further comprises:
and if the idle second HARQ process does not exist, the base station selects a third HARQ process to retransmit the data block in the preset number of HARQ processes.
5. The method of claim 1, wherein the base station utilizing the first HARQ process for the data transmission with the terminal comprises:
based on the first HARQ process, the base station receives a data block sent by the terminal through a physical uplink shared channel;
and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches the preset maximum retransmission number, the base station clears the cache of the first HARQ process.
6. The method of claim 1, wherein the base station utilizing the first HARQ process for the data transmission with the terminal comprises:
based on the first HARQ process, the base station receives a data block sent by the terminal through a physical uplink shared channel;
if the base station cannot correctly receive the data block sent by the terminal, the base station determines whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, the base station instructs the terminal to retransmit the data block by using the second HARQ process.
7. The method of claim 6, wherein the method further comprises:
and if the idle second HARQ process does not exist, the base station selects a third HARQ process from the predetermined number of HARQ processes and instructs the terminal to retransmit the data block by using the third HARQ process.
8. The method of any of claims 1 to 7, wherein the base station selecting a first HARQ process from the preset number of HARQ processes comprises:
and the base station selects the HARQ process with the longest time interval from the preset number of HARQ processes as the first HARQ process.
9. The method of claim 4 or 7, wherein if there is no idle second HARQ process, the base station selects a third HARQ process among the predetermined number of HARQ processes, comprising:
and if the idle second HARQ process does not exist, the base station selects the HARQ process with the longest time interval from the preset number of HARQ processes as a third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
10. A base station, comprising:
the device comprises a determining module and a judging module, wherein the determining module is used for determining whether the HARQ processes of the hybrid automatic repeat request with the preset number are all occupied when the base station to which the determining module belongs carries out data transmission with a terminal;
a selection module, configured to select an occupied first HARQ process from the predetermined number of HARQ processes if the predetermined number of HARQ processes are occupied;
and the processing module is used for carrying out the data transmission with the terminal by utilizing the first HARQ process.
11. The base station of claim 10, wherein the processing module is specifically configured to:
based on the first HARQ process, sending a data block to the terminal through a physical downlink shared channel;
receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block;
and if the HARQ feedback information is acknowledgement ACK (acknowledgement) or the first HARQ process reaches a preset maximum retransmission number, clearing the data block.
12. The base station of claim 10, wherein the processing module is specifically configured to:
based on the first HARQ process, sending a data block to the terminal through a downlink physical shared channel;
receiving HARQ feedback information sent by the terminal, wherein the HARQ feedback information indicates the receiving state of the data block;
and if the HARQ feedback information is Negative Acknowledgement (NACK), determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, retransmitting the data block by using the second HARQ process.
13. The base station of claim 12, wherein the processing module is further configured to:
and if the idle second HARQ process does not exist, selecting a third HARQ process from the preset number of HARQ processes to retransmit the data block.
14. The base station of claim 10, wherein the processing module is specifically configured to:
receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process;
and if the base station correctly receives the data block sent by the terminal or the first HARQ process reaches a preset maximum retransmission number, clearing the cache of the first HARQ process.
15. The base station of claim 10, wherein the processing module is specifically configured to:
receiving a data block sent by the terminal through a physical uplink shared channel based on the first HARQ process;
and if the base station cannot correctly receive the data block sent by the terminal, determining whether an idle second HARQ process exists in the predetermined number of HARQ processes, and if the idle second HARQ process exists, indicating the terminal to use the second HARQ process to retransmit the data block.
16. The base station of claim 15, wherein the processing module is further configured to:
and if the idle second HARQ process does not exist, selecting a third HARQ process from the predetermined number of HARQ processes, and indicating the terminal to use the third HARQ process to retransmit the data block.
17. The base station of any one of claims 10 to 16, wherein the determining module is specifically configured to:
and selecting the HARQ process with the longest time interval from the latest use from the preset number of HARQ processes as the first HARQ process.
18. The base station of claim 13 or 16, wherein the determining module is further specifically configured to:
and if no idle second HARQ process exists, selecting the HARQ process with the longest time interval from the preset number of HARQ processes as the third HARQ process, wherein the third HARQ process is the same as or different from the first HARQ process.
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| PCT/CN2016/111822 WO2018112922A1 (en) | 2016-12-23 | 2016-12-23 | Data transmission method and device |
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| CN110100494A CN110100494A (en) | 2019-08-06 |
| CN110100494B true CN110100494B (en) | 2021-09-17 |
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| CN112787768B (en) * | 2019-11-07 | 2022-08-26 | 大唐移动通信设备有限公司 | Service receiving method, service sending method and terminal |
| EP4079004A1 (en) * | 2019-12-20 | 2022-10-26 | IDAC Holdings, Inc. | Methods for enhanced reliability for mbms in wireless systems |
| CN111277371B (en) * | 2020-01-20 | 2022-11-08 | 展讯通信（上海）有限公司 | Data transmission method and equipment |
| CN113517956A (en) * | 2020-04-10 | 2021-10-19 | 华为技术有限公司 | Method and device for clearing cache |
| CN113938839B (en) * | 2020-06-29 | 2023-03-24 | 华为技术有限公司 | Data transmission method and device |
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| JP5150520B2 (en) * | 2009-01-08 | 2013-02-20 | 株式会社エヌ・ティ・ティ・ドコモ | Communication apparatus and communication method |
| CN101908953A (en) * | 2009-06-02 | 2010-12-08 | 中兴通讯股份有限公司 | Method and device for dispatching retransmission data |
| CN104660319B (en) * | 2013-11-18 | 2019-02-05 | 深圳市中兴微电子技术有限公司 | A kind of interference elimination method and device |
| US9369242B2 (en) * | 2013-12-23 | 2016-06-14 | Qualcomm Incorporated | Discarding of hybrid automatic repeat request (HARQ) processes |
| CN105682241B (en) * | 2014-11-21 | 2020-06-16 | 中兴通讯股份有限公司 | Method and device for occupying unauthorized carrier |
| CN105262570B (en) * | 2015-10-26 | 2018-07-03 | 上海华为技术有限公司 | A kind of processing method of data and base station and user equipment |
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