CN109951262B - HARQ feedback method and device - Google Patents
HARQ feedback method and device Download PDFInfo
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Abstract
The embodiment of the application provides a method for HARQ feedback, which comprises the following steps: the method comprises the steps that first equipment receives first information from second equipment, wherein the first information is used for indicating time resources for the first equipment and the second equipment to transmit HARQ feedback information, the time resources are located in a first time slot, and the first time slot is used for data transmission between the first equipment and third equipment; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment; the first device transmits HARQ feedback information on the time resources. When the backhaul transmission between the first device and the second device needs to perform HARQ feedback, AC transmission between the second device and the third device needs to yield for HARQ feedback. Therefore, a higher priority may be set for transmitting HARQ feedback information than for AC transmission. And when the relay node determines that the resource occupied by the HARQ feedback information conflicts with the resource occupied by the AC transmission, using the conflicted resource as the transmission HARQ feedback information.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for HARQ feedback.
Background
A relay technology, which is simply to say, during downlink transmission, a signal that a base station needs to send to a terminal is not directly sent to a UE, but is sent to a Relay Node (RN) first, and then the signal is forwarded to the UE by the relay node; during uplink transmission, the uplink signal of the UE is not directly sent to the base station, but is sent to a relay node first, and then is forwarded to the base station by the relay node.
The relay node is used as a new node introduced into the network, and some new connection links need to be added. In a cell of a base station where a relay exists, the following three types of links can be classified according to different connection links of link service objects: access (AC) links, direct links, and Backhaul (BH) links. The direct connection link is used for communication between the base station and a nearby terminal, the access link is used for mutual communication between the relay node and a terminal served by the relay node, and the return link is used for communication between the relay node and the base station. The relay node receives data from the base station and can be considered to be BH downlink transmission, and the relay node sends data to the base station and can be considered to be BH uplink transmission. BH uplink transmission and BH downlink transmission may be collectively referred to as BH transmission. The relay node or the base station may be considered to transmit data to the terminal as AC downlink transmission, and the relay node or the base station may be considered to receive data from the terminal as AC uplink transmission. AC upstream transmission and AC downstream transmission may be collectively referred to as AC transmission.
In a Long Term Evolution (LTE) system, for a Time Division Duplex (TDD) communication mode, a flow of a relay node performing a hybrid automatic repeat request (HARQ) includes: the relay node feeds back acknowledgement information of the downlink data, for example, ACK or NACK, through a Physical Uplink Control Channel (PUCCH). If the relay node receives a downlink shared channel (PDSCH) in the subframe n-K, it needs to feed back acknowledgement information in the subframe n. That is, the relay node feeds back the acknowledgement information after the delay of K subframes.
In LTE systems, the minimum value of K is 4 for TDD mode. That is, the minimum HARQ feedback delay of the relay node is 4 subframes. Accordingly, the minimum period of HARQ feedback by the relay node is 10 ms. For next generation communication systems, an important requirement is ultra low latency, such as a low latency high reliability transmission (URLLC) scenario requiring a single round trip transmission time (RTT) on the order of 1 ms. Obviously, the HARQ feedback mode in the LTE system cannot meet the low delay requirement of the next generation communication system.
Disclosure of Invention
The embodiment of the application provides a method and a device for HARQ feedback of hybrid automatic repeat request, which can meet the requirement of HARQ feedback of a system in low time delay.
In a first aspect, an embodiment of the present application provides a method for HARQ feedback, where the method includes: a first device receives first information from a second device, wherein the first information is used for indicating a time resource for transmitting HARQ feedback information between the first device and the second device, the time resource is located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment; the first device transmits the HARQ feedback information on the time resources.
The first device is a next hop device, a lower node or a downstream node of the second device on a link from the base station to the terminal. For example, the first device may be a first relay node and the second device may be a base station. Alternatively, the first device may be a third relay node and the second device may be a fourth relay node. The third device may be a terminal. When the backhaul transmission between the first device and the second device needs to perform HARQ feedback, AC transmission between the second device and the third device needs to yield for HARQ feedback. Therefore, a higher priority may be set for transmitting HARQ feedback information than for AC transmission. Under the condition that the priority of transmitting the HARQ feedback information is higher than that of AC transmission, when the relay node determines that the resource occupied by the HARQ feedback information conflicts with the resource occupied by the AC transmission, the conflicted resource is used for transmitting the HARQ feedback information. Therefore, the requirement of HARQ feedback with low time delay of the system can be met.
In one possible design, the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
In one possible design, the first device transmitting the HARQ feedback information on the time resource comprises: the first device sends the HARQ feedback information to a second device on the time resource; or, the first device receives the HARQ feedback information from a second device on the time resource.
In one possible design, the first device performs data transmission with the second device in a second time slot, where the first information is received by the first device in the second time slot, and the second time slot is a time slot before the first time slot.
Note that, if the first device is a terminal and the second device is a relay node, the relay node performs AC transmission in slot 1 and performs backhaul transmission in slot 2. Slot 1 is the slot immediately preceding slot 2. When the terminal needs to perform HARQ feedback on AC transmission of slot 1 in slot 2, the resource occupied by HARQ feedback information conflicts with the backhaul transmission resource of the relay node. When the priority of transmitting the HARQ feedback information is higher than that of the backhaul transmission, the relay node reserves part of resources originally used for the backhaul transmission to receive the HARQ feedback information. The data originally to be transmitted on the resource will be discarded. The relay node is in a receiving state of backhaul transmission in the time slot 2, and its subordinate terminal can only perform uplink data transmission. The terminal judges that the HARQ feedback has higher priority, only can occupy part of the symbols of the uplink data transmission to be used as the HARQ feedback, and the specific symbol position is obtained by analyzing the DCI in the time slot 1. If the relay node is in the sending state of backhaul transmission in timeslot 2, the relay node also needs to drop the corresponding backhaul transmission data to receive the limited and modified HARQ feedback information.
In a second aspect, an embodiment of the present application provides a method for hybrid automatic repeat request HARQ feedback, where the method includes: the method comprises the steps that a second device sends first information to a first device, wherein the first information is used for indicating time resources of HARQ feedback information transmission between the first device and the second device, the time resources are located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment; the second device and the first device transmit the HARQ feedback information on the time resource.
The first device is a next hop device, a lower node or a downstream node of the second device on a link from the base station to the terminal. For example, the first device may be a first relay node and the second device may be a base station. Alternatively, the first device may be a third relay node and the second device may be a fourth relay node. The third device may be a terminal. When the backhaul transmission between the first device and the second device needs to perform HARQ feedback, AC transmission between the second device and the third device needs to yield for HARQ feedback. Therefore, a higher priority may be set for transmitting HARQ feedback information than for AC transmission. Under the condition that the priority of transmitting the HARQ feedback information is higher than that of AC transmission, when the relay node determines that the resource occupied by the HARQ feedback information conflicts with the resource occupied by the AC transmission, the conflicted resource is used for transmitting the HARQ feedback information. Therefore, the requirement of HARQ feedback with low time delay of the system can be met.
In one possible design, the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
In a possible design, the second device performs data transmission with the first device in a second time slot, where the first information is sent by the second device in the second time slot, and the second time slot is a previous time slot to the first time slot.
In a third aspect, an embodiment of the present application provides an apparatus for hybrid automatic repeat request HARQ feedback, where the apparatus includes: a transmission module, configured to receive first information from a second device, where the first information is used to indicate a time resource for the first device and the second device to transmit HARQ feedback information, where the time resource is located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment; the transmitting module is further configured to transmit the HARQ feedback information on the time resource.
In one possible design, the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
In one possible design, the transmission module is specifically configured to send the HARQ feedback information to the second device on the time resource; or, receiving the HARQ feedback information from a second device on the time resource.
In a possible design, the transmission module is further configured to perform data transmission with the second device in a second timeslot, where the first information is received by the first device in the second timeslot, and the second timeslot is a timeslot before the first timeslot.
In a fourth aspect, an embodiment of the present application provides an apparatus for hybrid automatic repeat request HARQ feedback, where the apparatus includes: a transmission module, configured to send first information to a first device, where the first information is used to indicate a time resource for the first device and the second device to transmit HARQ feedback information, where the time resource is located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment; the transmitting module is further configured to transmit the HARQ feedback information with the first device on the time resource.
In one possible design, the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
In a possible design, the transmission module is further configured to perform data transmission with the first device in a second time slot, where the first information is sent by the second device in the second time slot, and the second time slot is a previous time slot of the first time slot.
In a fifth aspect, embodiments of the present application provide an apparatus that includes a transceiver and a processor. The memory is coupled with the processor. The transceiver performs reception and/or transmission of messages. The processor executing the code in the memory causes the apparatus to perform the method of the first or second aspect.
In a sixth aspect, embodiments of the present application provide a readable storage medium, which stores instructions that, when executed on a device, cause the device to perform the method of the first aspect or the second aspect.
In a seventh aspect, embodiments of the present application provide a computer program product, which when run on a computer, causes the computer to execute the method according to the first aspect or the second aspect.
In an eighth aspect, an embodiment of the present application provides a chip including a communication interface and a processor. The communication interface receives and/or transmits messages. The processor executing the code in the memory causes the chip to perform the method of the first or second aspect.
In a ninth aspect, embodiments of the present application provide a system. The system comprises the first device, the second device and/or the third device of the first or second aspect.
According to the embodiment of the application, the HARQ feedback with low time delay can be realized by setting higher priority for transmitting the HARQ feedback information.
Drawings
Fig. 1 is a block diagram of a wireless communication system according to an embodiment of the present application;
fig. 2 is a method for HARQ feedback according to an embodiment of the present application;
fig. 3 is a diagram illustrating HARQ feedback;
fig. 4 and fig. 5 are schematic diagrams of HARQ feedback for BH downlink transmission;
fig. 6 and fig. 7 are schematic diagrams of HARQ feedback for BH uplink transmission;
fig. 8 is a schematic diagram of HARQ feedback in a scenario where a first device is a terminal and a second device is a relay node;
fig. 9 is a schematic structural diagram of a possible structure of a first device or a second device provided in an embodiment of the present application;
fig. 10 is a schematic diagram of a possible logic structure of the first device or the second device according to an embodiment of the present disclosure.
Detailed Description
Fig. 1 is a schematic architecture diagram of a wireless communication system to which an embodiment of the present application is applied. As shown in fig. 1, the wireless communication system includes a base station, a relay node, and a terminal. The terminal can be connected with the base station in a wireless mode and carries out data transmission with the base station. The terminal can also be connected with the relay node in a wireless mode and performs data transmission with the relay node. In fig. 1, a backhaul link exists between a base station 1 and a relay node, an access link exists between the relay node and a terminal 1, and a direct link exists between the base station 1 and a terminal 2. It is also possible for the relay node in fig. 1 to handover to the base station 2. That is, the relay node disconnects the backhaul link with the base station 1 and establishes the backhaul link with the base station 2. Fig. 1 is a schematic diagram, and the communication system may further include other network devices, such as more base stations, more relay nodes, and more terminals.
The base station in the embodiment of the present application is an access device that the terminal accesses to the wireless communication system in a wireless manner, and may be a base station, an evolved node base station, a base station in a next generation communication system, or an access node in a WiFi system. The relay node in the embodiment of the present application may be a base station or a micro base station. The relay node can work in a low frequency band and can also work in a high frequency band.
The terminal in the embodiment of the present application may also be referred to as a terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and the like. The terminal can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiving function, other terminals with wireless transceiving function, and so on.
In next generation communication systems, resources for backhaul transmission are likely to be dynamically scheduled. HARQ feedback for data for backhaul transmission may not be delayed until the next slot for backhaul transmission (including slot, mini-slot, subframe, etc. scheduled time unit). Therefore, HARQ feedback for backhaul transmission data may need to be performed on a slot for AC transmission.
Fig. 2 is a method for HARQ feedback according to an embodiment of the present disclosure. The method comprises the following steps.
Step 201: the first device receives first information from the second device. The first information is used to indicate time resources for the first device and the second device to transmit HARQ feedback information, where the time resources are located in a first time slot, and the first time slot is used for data transmission between the first device and a third device. The priority of transmitting the HARQ feedback information is higher than the priority of data transmission between the first device and the third device. The data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
Step 202: the first device transmits the HARQ feedback information on the time resources.
The first device is a next hop device, a lower node or a downstream node of the second device on a link from the base station to the terminal. For example, the first device may be a first relay node and the second device may be a base station. Alternatively, the first device may be a third relay node and the second device may be a fourth relay node. The third device may be a terminal. When the backhaul transmission between the first device and the second device needs to perform HARQ feedback, AC transmission between the second device and the third device needs to yield for HARQ feedback. Therefore, a higher priority may be set for transmitting HARQ feedback information than for AC transmission.
The HARQ feedback method provided by the application can quickly perform HARQ feedback of backhaul transmission. When the backhaul transmissions are all dynamically triggered, in order to quickly perform HARQ feedback for the backhaul transmissions, time resources for the HARQ feedback for the backhaul transmissions may collide with time resources for the AC transmissions. Because the transmission of HARQ feedback information is prioritized over other transmissions, such as AC transmissions, the method provided by the embodiments of the present application may effectively resolve the conflict.
The present application will be further described below by taking the second device as a base station and the first device as a first relay node as an example. For convenience of description, the first relay node is hereinafter simply referred to as a relay node.
The base station determines that the current backhaul transmission between the base station and the relay node needs to be performed with HARQ feedback quickly. The base station transmits the first information to the relay node. The first information indicates the time resource for the relay node to perform HARQ feedback specifically. The relay node determines whether the time resource indicated by the base station conflicts with the time resource it makes the AC transmission. And if the conflict exists, the HARQ feedback of the backhaul transmission by default of the relay node has higher priority, and the time resource originally used for the AC transmission is used for the HARQ feedback of the backhaul transmission. That is, data of AC transmission where collision occurs needs to be dropped.
Specifically, the above conflict can be classified into the following four cases.
The first condition is as follows: and BH downlink transmission is carried out between the base station and the relay node, and the relay node needs to send HARQ feedback information to the base station. The HARQ feedback information needs to occupy the time resource originally used for AC downlink transmission by the relay node.
Case two: and BH downlink transmission is carried out between the base station and the relay node, and the relay node needs to send HARQ feedback information to the base station. The HARQ feedback information needs to occupy the time resource originally used for AC uplink transmission by the relay node.
Case three: and performing BH uplink transmission between the base station and the relay node, wherein the base station needs to send HARQ feedback information to the relay node. The HARQ feedback information needs to occupy the time resource originally used for AC downlink transmission by the relay node.
Case four: and performing BH uplink transmission between the base station and the relay node, wherein the base station needs to send HARQ feedback information to the relay node. The HARQ feedback information needs to occupy the time resource originally used for AC uplink transmission by the relay node.
Fig. 3 is a diagram illustrating HARQ feedback. As shown in fig. 3, data transmission between the base station and the relay node is performed on three consecutive time slots. Wherein, time slot 0, time slot 1 and time slot 2 represent three connected time slots, and each time slot is of self-contained (self-contained) structure. The time slot 1 is used for backhaul transmission between the base station and the relay node, and the time slot 2 is used for AC transmission between the base station, the relay and the terminal.
At time T1 of time slot 0, the relay node completes data scheduling and preparation for AC transmission of time slot 2, including data encoding, modulation, precoding and the like
The base station determines that HARQ feedback needs to be performed quickly for backhaul transmission of slot 1. The base station indicates, through Downlink Control Information (DCI), a time resource for the relay node to perform HARQ feedback in time slot 2.
At time T2 of slot 1, the relay node completes DCI analysis. And the relay node acquires the time resource for HARQ feedback. The relay node needs to determine that the time resource for HARQ feedback and the time resource for AC transmission collide.
From time T3 of slot 2, the relay node reserves time resources for HARQ feedback. Alternatively, the relay node drops the AC transmitted data. And performing HARQ feedback by using the part of time resources. For the first case and the second case, the relay node transmits the HARQ feedback information to the base station by using the part of the time resources. Further, for case one, the relay node needs to send a preemption indication to the terminals accessing the relay node in slot 2. For case two, the relay node does not receive the AC uplink data of the portion of time resources, and no additional signaling indication is needed. For case three and case four, the relay node receives HARQ feedback information from the base station using the portion of time resources. Further, for case three, the relay node needs to send a preemption indication to the terminal accessing the relay node in slot 2. For case four, the relay node does not receive the AC uplink data of the portion of time resources, and no additional signaling indication is needed.
Wherein the preemption indication is used to inform a terminal of occupied time and/or frequency resources among resources originally allocated to the terminal for communication. The terminal will not transmit on the occupied time and/or frequency resources, which other devices may utilize for emergency communication. Therefore, the success rate of demodulation and decoding when the part of resources are utilized by other equipment can be improved.
It should be noted that, an application scenario in the embodiment of the present application is that HARQ feedback information of backhaul transmission needs to be fed back in a time slot for AC transmission, or HARQ feedback information of AC transmission needs to be fed back in a time slot for backhaul transmission. This may cause HARQ feedback information to possibly need to occupy resources originally used for AC transmission resources or backhaul transmission. Accordingly, the transmission of the HARQ feedback information may be set to have a higher priority than the backhaul transmission or the AC transmission. When the relay node determines that the resources required by the HARQ feedback information collide with the resources occupied by the AC transmission or the backhaul transmission, the relay node drops (may also preempt or leave empty in the embodiment of the present application) the resource where the collision occurs, and uses the resource as the HARQ feedback information.
When the base station determines that HARQ feedback information needs to be transmitted for the current backhaul transmission, the base station indicates resources occupied by the specific feedback of the relay node (which may be referred to as feedback positions in the embodiments of the present application). The relay node determines whether the feedback position collides with the AC transmission. And if the collision happens, the relay node transmits the HARQ feedback information by default and has higher priority, and the AC data with the collision is knocked down. And transmitting the HARQ feedback information by utilizing the part of resources originally used for transmitting the AC data. Since the scheduling of the PDSCH or PUSCH of the backhaul transmission may be dynamic, and the transmission of the HARQ feedback information may also be dynamic, the PUCCH or PDCCH of the backhaul transmission may also be dynamically triggered.
Fig. 4 and fig. 5 are schematic diagrams of HARQ feedback for BH downlink transmission. As shown in fig. 4 and 5, the scheduled time unit of the relay node is exemplified by a time slot. Where slot 0, slot 1, and slot 2 represent three contiguous slots, each of which is a self-contained (self-contained) structure. For example, the timeslot 1 is a slef-associated structure, and mainly includes a downlink control portion, a downlink data portion, and an uplink control portion of backhaul transmission, such as DL ctrl, DL data, and UL ctrl in fig. 4 or fig. 5, respectively. Where the uplink control part is located on the last 1 to 2 symbols of slot 1. Time slot 2 in fig. 4 is also an s-left-contained structure, and mainly includes a downlink control portion, a downlink data portion, and an uplink control portion of AC transmission, such as DL ctrl, DL data, and UL ctrl in fig. 4, respectively. The timeslot 2 in fig. 5 is also a slef-contained structure, and mainly includes a downlink control portion, an uplink data portion, and an uplink control portion for AC transmission, such as DL ctrl, UL data, and UL ctrl in fig. 5, respectively. The base station and the relay node have similar frame structures.
For the scenario shown in fig. 4 or fig. 5, the method provided by the present embodiment includes the following steps.
Step 1: at the time T1 of the time slot 0, the relay node completes data scheduling and preparation for AC transmission of the time slot 2, including data encoding, modulation, precoding, and the like;
step 2: and the base station judges that the BH downlink transmission of the time slot 1 needs to be subjected to HARQ feedback. The DCI transmitted in the DL ctrl of slot 1 indicates the specific location of the relay node for HARQ feedback in slot 2. It should be noted that HARQ feedback cannot be performed in the UL ctrl of AC transmission, because the relay node is in a receiving state in the UL ctrl of AC transmission, and the HARQ feedback requires that the relay node is in a transmitting state.
And step 3: at time T2 of slot 1, the relay node completes DCI analysis and knows the specific position where HARQ feedback is performed. The relay node determines to perform HARQ feedback and AC transmission conflict;
and 4, step 4: starting from time T3 of time slot 2, the relay node drops the data part of AC transmission and sends HARQ feedback information of backhaul transmission by using the part of resources;
and 5: if the conflict with the HARQ feedback is the PDSCH transmitted by AC (as shown in fig. 4), the relay node sends a preemption indication to the subordinate UE through the DCI transmitted in the DL ctrl at time slot 2; if the PUSCH (as shown in fig. 5) of the AC transmission collides with the HARQ feedback, the relay node does not receive the AC uplink transmission signal at the position where the collision occurs, and no signaling indication is required.
Fig. 6 and 7 are schematic diagrams of HARQ feedback for BH uplink transmission. As shown in fig. 6 and 7, the scheduled time unit of the relay node is exemplified by a time slot. Where slot 0, slot 1, and slot 2 represent three contiguous slots, each of which is a self-contained (self-contained) structure. For example, the timeslot 1 is a slef-associated structure, and mainly includes a downlink control portion, an uplink data portion, and an uplink control portion of backhaul transmission, such as DL ctrl, UL data, and UL ctrl in fig. 6 or fig. 7, respectively. Where the uplink control part is located on the last 1 to 2 symbols of slot 1. The timeslot 2 in fig. 6 is also a slef-contained structure, and mainly includes a downlink control portion, a downlink data portion, and an uplink control portion for AC transmission, such as DL ctrl, DL data, and UL ctrl in fig. 6, respectively. The timeslot 2 in fig. 7 is also a slef-contained structure, and mainly includes a downlink control portion, an uplink data portion, and an uplink control portion for AC transmission, such as DL ctrl, UL data, and UL ctrl in fig. 7, respectively. The base station and the relay node have similar frame structures.
For the scenario shown in fig. 6 or fig. 7, the method provided by the present embodiment includes the following steps.
Step 1: at the time T1 of the time slot 0, the relay node completes data scheduling and preparation for AC transmission of the time slot 2, including data encoding, modulation, precoding, and the like;
step 2: and the base station judges that the BH uplink transmission of the time slot 1 needs to be subjected to HARQ feedback. The DCI transmitted in the DL ctrl of slot 1 indicates the specific location of the relay node for HARQ feedback in slot 2. It should be noted that HARQ feedback cannot be performed in UL ctrl of AC transmission, because the relay node is in a receiving state in UL ctrl of AC transmission, and HARQ feedback requires that the relay node is in a receiving state.
And step 3: at time T2 of slot 1, the relay node completes DCI analysis and knows the specific position where HARQ feedback is performed. The relay node determines that the transmission HARQ feedback information conflicts with AC transmission;
and 4, step 4: starting from time T3 of time slot 2, the relay node drops the data part of AC transmission and sends HARQ feedback information of backhaul transmission by using the part of resources;
and 5: if the conflict with the HARQ feedback is the PDSCH transmitted by AC (as shown in fig. 6), the relay node sends a preemption indication to the subordinate UE through the DCI transmitted in DL ctrl at time slot 2; if the PUSCH (as shown in fig. 7) of the AC transmission collides with the HARQ feedback, the relay node does not receive the AC uplink transmission signal at the position where the collision occurs, and no signaling indication is required.
It should be noted that, the time slot 0 in fig. 4 to 7 does not limit whether it performs backhaul transmission or AC transmission. Alternatively, one or more time slots before the time slot 1 in fig. 4 to 7 may be a time slot for backhaul transmission or a time slot for AC transmission.
Fig. 8 is a schematic diagram of HARQ feedback in a scenario where the first device is a terminal and the second device is a relay node. As shown in fig. 8, the relay node performs AC transmission in slot 1 and performs backhaul transmission in slot 2. When the terminal needs to perform HARQ feedback on AC transmission of slot 1 in slot 2, the resource occupied by HARQ feedback information conflicts with the backhaul transmission resource of the relay node. When the priority of transmitting the HARQ feedback information is higher than that of the backhaul transmission, the relay node reserves part of resources originally used for the backhaul transmission to receive the HARQ feedback information. The data originally to be transmitted on the resource will be discarded. It should be noted that the relay node is in the receiving state of backhaul transmission in timeslot 2, and its subordinate terminal can only perform uplink data transmission. The terminal judges that the HARQ feedback has higher priority, only can occupy part of the symbols of the uplink data transmission to be used as the HARQ feedback, and the specific symbol position is obtained by analyzing the DCI in the time slot 1. Certainly, when the timeslot corresponding to the terminal is of a slef-related structure, if the HARQ feedback delay meets the requirement, the terminal may also perform HARQ feedback in the uplink control portion of the timeslot where AC transmission is performed.
Under the condition that the priority of transmitting the HARQ feedback information is higher than that of AC transmission, when the relay node determines that the resource occupied by the HARQ feedback information conflicts with the resource occupied by the AC transmission, the conflicted resource is used for transmitting the HARQ feedback information. The HARQ feedback method provided by the embodiment of the application can meet the low time delay requirement of a system.
Corresponding to the method embodiments described above, in the embodiments of the present application, functional modules may be divided between the first device and the second device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In a case that each function module is divided according to each function, fig. 9 is a schematic diagram of a possible structure of a first device or a second device provided in an embodiment of the present application, where the first device includes: and a transmission module 901. The transmission module may include: transmitting section 1001 and receiving section 1002. The sending unit 1001 is configured to support a relevant step of sending data or information by the first device or the second device in the method embodiment. For example, the first device transmits HARQ feedback information. The receiving unit 1002 is used to support the relevant steps of receiving data or information by the first device or the second device. For example, the second device receives HARQ feedback information. Optionally, the first device or the second device further includes: a processing module 902, configured to support relevant steps of the first device or the second device to process the HARQ feedback information, and the like.
In terms of hardware implementation, the processing module 902 may be a processor or a processing circuit; the transmitting unit 1001 may be a transmitter, a transmitting circuit, or the like, the receiving unit 1002 may be a receiver, a receiving circuit, or the like, and the transmitting unit 1001 and the receiving unit 1002 may constitute a communication interface.
Fig. 10 is a schematic diagram illustrating a possible logical structure of the first device or the second device according to an embodiment of the present disclosure. The first device or the second device includes: a communication interface 1103. In an embodiment of the present application, the communication interface 1103 is used to support the first device or the second device to communicate with other devices than itself. For example, the communication interface 1103 is used to support the steps related to the second device sending the first information, or to support the steps related to the first device receiving the first information. Optionally, the first device may further include a memory 1101, a bus 1104, and a processor 1102. The processor 1102 and the memory 1101 may be connected to each other by a bus 1104. The processor 1102 can be configured to support information of available symbols and related steps regarding configuration of backhaul transmission, etc. by the first device, among others. Wherein the memory 1101 is used for storing codes and data of the first device.
In particular implementations, processor 1102 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. Bus 1104, as well as bus 1304, can be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.
The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, for example, the first device, the second device and the third device, includes a corresponding hardware structure and/or software modules for performing each function in order to implement the functions described above. Those of skill in the art would readily appreciate that the present application is capable of being implemented as hardware or a combination of hardware and computer software for performing the exemplary network elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In another embodiment of the present application, a readable storage medium is further provided, where the readable storage medium stores computer-executable instructions, and when one device (which may be a single chip, a chip, or the like) or a processor may invoke the readable storage medium to store the computer-executable instructions to perform the steps of the first device or the second device in the method provided in fig. 2. The aforementioned readable storage medium may include: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
In another embodiment of the present application, there is also provided a computer program product comprising computer executable instructions stored in a computer readable storage medium; the computer-executable instructions may be read by at least one processor of the device from a computer-readable storage medium, and execution of the computer-executable instructions by the at least one processor causes the device to perform the steps of the first device or the second device in the method provided by fig. 2.
In another embodiment of the present application, there is also provided a communication system including a plurality of devices including a first device and a second device. Wherein, the first device or the second device may be the device provided in fig. 9 or fig. 10.
The embodiment of the present application further provides a chip for implementing the method described in the above embodiment (for example, fig. 2). The chip includes a processing circuit and a transceiver circuit. The transceiver circuit may be, for example, an input/output interface, a pin or a circuit, etc. The processing circuit may execute computer-executable instructions stored by the memory unit. The chip may also include memory cells. The storage unit may be a register, a cache, etc. Of course, additional memory cells may be provided for the chip. For example, the storage unit may also be a storage unit located outside the chip in the terminal or the access device, such as a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a Random Access Memory (RAM), and the like. The chip can be applied to a base station or a relay node.
Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Yet another aspect of the application provides an apparatus comprising the processor executing code in memory to cause the apparatus to perform the various methods described previously. The memory stores code and data therein. The memory is located in the device, the memory coupled to the processor. The memory may also be located outside the device.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
In summary, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (14)
1. A method for HARQ feedback, the method comprising:
a first device receives first information from a second device, wherein the first information is used for indicating a time resource for transmitting HARQ feedback information between the first device and the second device, the time resource is located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment;
the first device transmits the HARQ feedback information on the time resources.
2. The method of claim 1,
the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
3. The method according to claim 1 or 2,
the first device transmitting the HARQ feedback information on the time resources comprises:
the first device sends the HARQ feedback information to a second device on the time resource; alternatively, the first and second electrodes may be,
the first device receives the HARQ feedback information from a second device on the time resources.
4. The method according to claim 1 or 2,
and the first device performs data transmission with the second device in a second time slot, wherein the first information is received by the first device in the second time slot, and the second time slot is a previous time slot of the first time slot.
5. A method for HARQ feedback, the method comprising:
the method comprises the steps that a second device sends first information to a first device, wherein the first information is used for indicating time resources of HARQ feedback information transmission between the first device and the second device, the time resources are located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment;
the second device and the first device transmit the HARQ feedback information on the time resource.
6. The method of claim 5,
the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
7. The method according to claim 5 or 6,
and the second device performs data transmission with the first device in a second time slot, wherein the first information is sent by the second device in the second time slot, and the second time slot is a previous time slot of the first time slot.
8. An apparatus for hybrid automatic repeat request (HARQ) feedback, the apparatus comprising:
a transmission module, configured to receive first information from a second device, where the first information is used to indicate a time resource for a first device and the second device to transmit HARQ feedback information, where the time resource is located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment;
the transmitting module is further configured to transmit the HARQ feedback information on the time resource.
9. The apparatus of claim 8,
the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
10. The apparatus according to claim 8 or 9, wherein the transmission module is specifically configured to:
transmitting the HARQ feedback information to a second device on the time resource; alternatively, the first and second electrodes may be,
receiving the HARQ feedback information from a second device on the time resources.
11. The apparatus according to claim 8 or 9,
the transmission module is further configured to perform data transmission with the second device in a second time slot, where the first information is received by the first device in the second time slot, and the second time slot is a previous time slot of the first time slot.
12. An apparatus for hybrid automatic repeat request (HARQ) feedback, the apparatus comprising:
a transmission module, configured to send first information to a first device, where the first information is used to indicate a time resource for the first device and a second device to transmit HARQ feedback information, where the time resource is located in a first time slot, and the first time slot is used for data transmission between the first device and a third device; the priority for transmitting the HARQ feedback information is higher than the priority for transmitting data between the first equipment and the third equipment;
the transmitting module is further configured to transmit the HARQ feedback information with the first device on the time resource.
13. The apparatus of claim 12,
the data that the first device and the third device would otherwise have transmitted on the time resource is discarded.
14. The apparatus of claim 12 or 13,
the transmission module is further configured to perform data transmission with the first device in a second time slot, where the first information is sent by the second device in the second time slot, and the second time slot is a previous time slot of the first time slot.
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| CN111565092B (en) * | 2019-02-13 | 2022-01-04 | 大唐移动通信设备有限公司 | HARQ feedback method and terminal |
| CN112311504B (en) * | 2019-08-01 | 2022-08-26 | 华为技术有限公司 | Transmission method of feedback information and terminal device |
| WO2021088026A1 (en) * | 2019-11-08 | 2021-05-14 | 华为技术有限公司 | Data transmission feedback latency determining method and apparatus |
| CN111245579B (en) * | 2020-01-19 | 2021-03-19 | 北京邮电大学 | HARQ feedback time period determination method based on sidelink |
| CN111277371B (en) * | 2020-01-20 | 2022-11-08 | 展讯通信（上海）有限公司 | Data transmission method and equipment |
| CN113517957A (en) * | 2020-04-10 | 2021-10-19 | 华为技术有限公司 | HARQ information transmission method and device |
| WO2022151442A1 (en) * | 2021-01-15 | 2022-07-21 | 华为技术有限公司 | Resource conflict processing method and apparatus |
| CN116981067A (en) * | 2022-04-19 | 2023-10-31 | 华为技术有限公司 | Method and device for data transmission |
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