CN111436033A - Transmission operation method and terminal - Google Patents
Transmission operation method and terminal Download PDFInfo
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- CN111436033A CN111436033A CN201910028754.0A CN201910028754A CN111436033A CN 111436033 A CN111436033 A CN 111436033A CN 201910028754 A CN201910028754 A CN 201910028754A CN 111436033 A CN111436033 A CN 111436033A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/23—Manipulation of direct-mode connections
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Abstract
The embodiment of the invention provides a transmission operation method and a terminal, wherein the method comprises the following steps: the first terminal receives the direct link auxiliary information sent by the second terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information. In the scheme of the invention, the sending end carries out transmission operation according to the received through link auxiliary information, so that the resource selection result is more reliable, the reliability of data transmission is improved, the resource utilization rate is higher, and the system throughput is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a transmission operation method and a terminal.
Background
NR (New Radio, New wireless) V2X (Vehicle-to-evolution) supports two resource selection modes:
mode 1: a base station schedules a resource used by sidelink (direct link) transmission;
mode 2: the terminal determines the resources used for sidelink transmission.
Wherein the mode 2 is further divided into 4 seed modes:
sub-pattern (a): the UE autonomously selects a side link resource for transmission;
sub-pattern (b): UE selects side link resources for other UEs;
sub-pattern (c): the UE is configured with NR configured grants (like mode 1) for side-chain transmission;
sub-pattern (d): the UE schedules sidelink transmissions for other UEs.
In the sub-mode (a), if the sending end has data to send, the sending end firstly senses the resources of the sensing window, and selects from the remaining available resources through certain resource exclusion rules and measurement steps.
However, the resource selection process of the sub-mode (a) is executed by the sending end terminal, and the selected resource is a resource which is less interfered from the perspective of the sending end and does not participate in the receiving end terminal;
considering the relative motion of the transmitting end and the receiving end, the communication distance between the V2X transmitting end and the receiving end is about 2.5 times of the moving speed, which can reach the level of hundreds of meters or even thousands of meters. Therefore, if the transmission resource is determined only from the perspective of the transmitting end, it is easy to have the problems that the receiving end is relatively seriously interfered on the selected transmission resource, resulting in low SINR and incorrect data demodulation.
Therefore, the sub-mode (b) is proposed and has been widely noticed, but further research is needed on what kind of association information (side information of direct link) includes, how to acquire, what users send, what channel to send, how to assist resource selection after the sender takes the information, and the like.
Disclosure of Invention
The invention provides a transmission operation method and a terminal. The transmitting end carries out transmission operation according to the received through link auxiliary information, so that the resource selection result is more reliable, the reliability of data transmission is improved, the resource utilization rate is higher, and the system throughput is improved.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a method of operation of a transmission, the method comprising:
the first terminal receives the direct link auxiliary information sent by the second terminal;
and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
Wherein the through link assistance information comprises: direct link feedback control information SFCI and/or direct link channel state information CSI.
Wherein the SFCI comprises: negative acknowledgement NACK or discontinuous transmission DTX;
the CSI includes: at least one of a channel quality indication CQI, a precoding matrix indication PMI, a rank indication RI, a reference signal received power RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a CSI-RS resource indication CRI, a channel gain, a channel loss, an interference condition, a vehicle motion condition, and a noise signal.
Wherein the operations comprise: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
Wherein the through link assistance information comprises: in case of NACK or DTX, the first terminal operates transmission between the first terminal and the second terminal according to the direct link assistance information, including:
when the physical layer of the first terminal continuously receives the NACK or DTX for N times, or the first terminal receives the NACK or DTX for N times within a first time window, or a ratio of the number of times that the first terminal receives the NACK or DTX and the number of times that the first terminal sends data exceeds a preset threshold, performing a resource reselection operation or a sensing mode changing operation or a transmission mode changing operation on transmission between the first terminal and the second terminal, where N is a positive integer.
Wherein, in the direct link multicast communication, the direct link auxiliary information includes: in case of NACK or DTX, the method further includes:
and when the physical layer of the first terminal receives the direct link auxiliary information sent by the second terminals with the number larger than a preset number, the first terminal and the second terminals carry out multicast retransmission, otherwise, unicast retransmission is carried out.
Wherein the through link assistance information comprises: during CSI, the first terminal operates transmission between the first terminal and the second terminal according to the direct link auxiliary information, including:
and the physical layer of the first terminal performs at least one of Modulation and Coding Scheme (MCS) adjustment operation, closed-loop power control parameter adjustment operation, resource pool reselection operation and open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the CQI, the PMI, the RI, the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition and the noise signal.
After the physical layer of the first terminal receives the direct link auxiliary information sent by the second terminal, the method further includes: and the physical layer of the first terminal sends the through link auxiliary information or the indication information to a high layer of the first terminal, wherein the high layer comprises a Medium Access Control (MAC) layer.
Wherein the through link assistance information comprises: in case of NACK or DTX, the first terminal operates transmission between the first terminal and the second terminal according to the direct link assistance information, including:
when the high layer of the first terminal continuously receives the NACK or DTX or the indication information P times, or when the high layer of the first terminal receives the NACK or DTX or the indication information P times within a third time window, or when the ratio of the number of times that the high layer of the first terminal receives the NACK or DTX or the number of times that the indication information is transmitted to the number of times that the high layer of the first terminal transmits data exceeds a preset threshold, performing a resource reselection operation or a change operation of a sensing mode or a change operation of a transmission mode on transmission between the first terminal and the second terminal; wherein P is a positive integer.
Wherein, the indication information is sent to the higher layer when the physical layer receives the NACK or DTX M times continuously, or receives the NACK or DTX M times within a second time window, or when a ratio of the number of times of receiving the NACK or DTX and the number of times of sending data exceeds a preset threshold, where M is a positive integer.
Wherein the through link assistance information comprises: during CSI, the first terminal operates transmission between the first terminal and the second terminal according to the direct link auxiliary information, including:
and the high layer of the first terminal performs at least one of resource pool reselection operation and open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the CQI, the PMI, the RI, the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition and the noise signal or the indication information.
Wherein the performing a resource pool reselection operation on the transmission between the first terminal and the second terminal comprises: according to a resource pool configured by the network equipment, directly carrying out resource pool reselection operation on the transmission between the first terminal and the second terminal; or sending a resource pool reselection request to network equipment, and performing resource pool reselection operation on transmission between the first terminal and the second terminal by the network equipment;
the performing an open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal includes: directly performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal; or sending an open-loop power control parameter adjustment request to network equipment, and performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal by the network equipment.
An embodiment of the present invention further provides an operation method of transmission, where the method includes:
the second terminal sends the direct link auxiliary information to the first terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
Wherein the through link assistance information comprises: direct link feedback control information SFCI and/or direct link channel state information CSI.
Wherein the through link feedback control information SFCI includes: negative acknowledgement NACK or discontinuous transmission DTX; the NACK or DTX indicates that the second terminal does not detect the direct link control information SCI or demodulates the direct link data erroneously;
the CSI includes: at least one of a channel quality indication CQI, a precoding matrix indication PMI, a rank indication RI, a reference signal received power RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a CSI-RS resource indication CRI, a channel gain, a channel loss, an interference condition, a vehicle motion condition, and a noise signal
Wherein the operations comprise: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
An embodiment of the present invention further provides a terminal, where the terminal is a first terminal, and the terminal includes:
the transceiver is used for receiving the direct link auxiliary information sent by the second terminal;
a processor configured to operate transmission between the first terminal and the second terminal according to the direct link auxiliary information.
An embodiment of the present invention further provides a terminal, where the terminal is a second terminal, and the terminal includes:
a transceiver for transmitting the through link assistance information to the first terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
An embodiment of the present invention further provides a terminal, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme of the invention, the first terminal receives the through link auxiliary information sent by the second terminal; the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information, and the first terminal performs operations such as sending resource reselection, sensing mode reselection, transmission mode change and the like according to the received through link auxiliary information, so that a resource selection result is more reliable, the reliability of data transmission is improved, the resource utilization rate is higher, and the system throughput is improved.
Drawings
FIG. 1 is a flow chart illustrating a method of operation of a transport according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment of the invention provides a transmission operation method and a transmission terminal aiming at the problem of using the through link auxiliary information by a sending end. The resource selection result is more reliable, the reliability of data transmission is improved, the resource utilization rate is higher, and the system throughput is improved.
As shown in fig. 1, an embodiment of the present invention provides a method of operation of a transmission, the method including:
and step 12, the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
In the embodiment of the present invention, the first terminal may be a transmitting end (Tx UE) of the direct link data, the second terminal may be a receiving end (Rx UE) of the direct link data, and the first terminal performs operations such as sending resource/resource pool reselection, sensing mode reselection, transmission mode change, and the like according to the received direct link auxiliary information, so that a resource selection result is more reliable, reliability of data transmission is improved, a resource utilization rate is higher, and system throughput is improved.
In this embodiment of the present invention, the direct link auxiliary information includes: direct link feedback control information (SFCI) and/or direct link Channel State Information (CSI).
Wherein the SFCI comprises: negative acknowledgement NACK or discontinuous transmission DTX; the DTX means that the second terminal has no information transmission on the resources occupied by the SFCI.
The CSI includes: at least one of a Channel Quality Indication (CQI), a Precoding Matrix Indication (PMI), a Rank Indication (RI), a Reference Signal Received Power (RSRP), a Reference Signal Received Quality (RSRQ), a Received Signal Strength Indication (RSSI), a CSI-RS resource indication (CRI), a channel gain, a channel loss, an interference condition, a vehicle motion condition, and a noise signal.
Wherein the operations comprise: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
In an implementation manner of the embodiment of the present invention, the through link auxiliary information includes: in case of NACK or DTX, the step 12 may specifically include:
step 121, when the physical layer of the first terminal continuously receives the NACK or DTX for N times, or the first terminal receives the NACK or DTX for N times within a first time window, or a ratio of the number of times that the first terminal receives the NACK or DTX and the number of times that the first terminal sends data exceeds a preset threshold, performing a resource reselection operation or a sensing mode changing operation or a transmission mode changing operation on transmission between the first terminal and the second terminal, where N is a positive integer.
For example, when the transmitting end continuously receives N times of NACK/DTX (N > -1), it will trigger the resource reselection process; here, the transmission end receives NACK/DTX, which means that the receiving end does not detect PSCCH (physical direct link control channel) or demodulate an erroneous PSCCH (physical direct link shared channel), and resource retransmission is required at this time.
When the transmitting end continuously receives N times of NACK/DTX (N > -1), the change of the perception mode is triggered.
The first embodiment is as follows: the transmitting end selects the transmitting resources according to the long-term sensing result, and transmits the direct link data on the selected resources, but receives N times of NACK/DTX, which indicates that the reliability of the resource selection result is poor, and then changes the resource selection result into a short-term sensing mode, thereby reducing resource collision and improving the transmission reliability. For example, long-term sensing (largescale sensing) has a longer sensing window and a larger sensing granularity than short-term sensing (small scale sensing).
When the transmitting end continuously receives N times of NACK/DTX (N > -1), the operation of changing the transmission mode is triggered. The transmission modes include, but are not limited to: semi-persistent scheduling (SPS), per-slot transmission (single slot transmission), multi-slot transmission (multi-slot transmission), etc.
The second embodiment is as follows: the transmitting end selects the transmitting resources according to the sensing result by per-slot, transmits the straight-through link data on the selected resources, receives N times of NACK/DTX, and indicates that the data is possibly transmitted based on per-slot before, but the data packet is too large, so that the code rate is too high, the demodulation fails, and then triggers multi-slot transmission, namely, the same TB (transmission block) is transmitted in continuous K (K > -1) available slots, thereby reducing the code rate and improving the reliability.
In another implementation manner of the embodiment of the present invention, after step 11, the method may further include:
step 111, the physical layer of the first terminal sends the direct link auxiliary information or the indication information to a higher layer of the first terminal, where the higher layer includes a medium access control MAC layer. Wherein, the indication information is sent to the higher layer when the physical layer receives the NACK or DTX M times continuously, or receives the NACK or DTX M times within a second time window, or when a ratio of the number of times of receiving the NACK or DTX and the number of times of sending data exceeds a preset threshold, where M is a positive integer.
Correspondingly, the direct link auxiliary information includes: when NACK or DTX, if N times of NACK or DTX are continuously received and reported to the high layer; the step 12 may specifically include:
122, when the high layer of the first terminal continuously receives the NACK or DTX for P times or receives the first indication information reported by the physical layer, or when the high layer of the first terminal receives the NACK or DTX for P times or receives the first indication information reported by the physical layer within a third time window, or when a ratio of the times that the high layer of the first terminal receives the NACK or DTX times or receives the first indication information reported by the physical layer to the times that the high layer of the first terminal sends data exceeds a preset threshold, performing a resource reselection operation or a change operation of a sensing mode or a change operation of a transmission mode on the transmission between the first terminal and the second terminal; wherein P is a positive integer.
Further, the direct link assistance information includes: in case of NACK or DTX, the method may further include:
step 13, in the direct link multicast communication, when the physical layer of the first terminal receives the direct link auxiliary information sent by the second terminals with the number larger than a preset number, the first terminal and the second terminals perform multicast retransmission, otherwise, unicast retransmission is performed.
For example, if the transmitting end receives the multicast direct link feedback control information, it may select to trigger the multicast retransmission or the unicast retransmission, and specifically, it may select to perform the multicast retransmission or the unicast retransmission according to whether the direct link feedback control information can distinguish the number of users for/feeding back NACK/DTX. For example, when the number of users feeding back NACK/DTX is greater than a preset value, multicast retransmission is performed, otherwise, unicast retransmission is performed.
The third concrete embodiment: and the transmitting end selects resources for multicast communication based on the perceived result, and transmits multicast direct link data on the selected resources, and if receiving NACK/DTX fed back by 15 receiving ends and being greater than a preset value (T is 10), the transmitting end selects multicast retransmission.
In another implementation manner of the embodiment of the present invention, the direct link auxiliary information includes: at the time of CSI; the step 12 may include:
and 123, the physical layer of the first terminal performs at least one of Modulation and Coding Scheme (MCS) adjustment operation, closed-loop power control parameter adjustment operation, resource pool reselection operation and open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the CQI, the PMI, the RI, the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition and the noise signal.
Specifically, if the CSI is short-term CSI, the physical layer of the first terminal performs modulation and coding scheme, MCS, adjustment operation and closed-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the CQI, PMI, and RI; or
If the CSI is a long-term CSI, the physical layer of the first terminal performs a resource pool reselection operation or an open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal according to at least one of the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition, and the noise signal or second indication information reported by the physical layer; the second indication information is used for indicating that the channel quality is lower than a preset value.
Wherein the performing a resource pool reselection operation on the transmission between the first terminal and the second terminal comprises: according to a resource pool configured by the network equipment, directly carrying out resource pool reselection operation on the transmission between the first terminal and the second terminal; or sending a resource pool reselection request to network equipment, and performing resource pool reselection operation on transmission between the first terminal and the second terminal by the network equipment;
the performing an open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal includes: directly performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal; or sending an open-loop power control parameter adjustment request to a network device, and performing, by the network device, an open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal.
In a specific implementation, fast MCS adjustment and closed-loop power control parameter adjustment are performed based on short term CSI feedback (short-term CSI feedback), for example, CQI/PMI/RI.
Triggering resource pool reselection is performed based on long term CSI feedback, e.g., RSRP, RSSI, RSRQ, CRI, channel gain, channel loss, interference conditions, vehicle motion conditions, and noise signals. Specifically, the method comprises the following steps:
and (3) directly performing resource pool reselection: for example, through base station configuration or pre-configuration (pre-configuration), if a plurality of resource pools configured to the transmitting end are available, the resource pools can be directly reselected;
requesting a base station to reselect a resource pool: the transmitting terminal sends a physical layer/high layer indication to the base station to request the base station to reselect the resource pool.
Particularly, the long-term channel state is not good enough, which indicates that the resource pool is overloaded and needs to be reselected.
Open loop power control parameter adjustments are triggered based on the long CSI feedback, e.g., RSRP, RSSI, RSRQ, CRI, channel gain, channel loss, interference conditions, vehicle motion conditions, and noise signals.
Specifically, the open-loop power control parameter adjustment is directly performed: for example, if a plurality of sets of open-loop power control parameters are configured for the transmitting end through base station configuration or pre-configuration, the open-loop power control parameters can be directly adjusted;
requesting the base station to carry out open-loop power control parameter adjustment: the transmitting terminal sends physical layer/high layer indication information to the base station to request the base station to carry out open loop power control parameter adjustment.
In another implementation manner of the embodiment of the present invention, after the step 11, the method may further include:
step 112, the physical layer of the first terminal sends the through link auxiliary information or the indication information to a higher layer of the first terminal, where the higher layer includes a medium access control MAC layer. Wherein, the indication information is sent to the higher layer when the physical layer receives the NACK or DTX M times continuously, or receives the NACK or DTX M times within a second time window, or when a ratio of the number of times of receiving the NACK or DTX and the number of times of sending data exceeds a preset threshold, where M is a positive integer.
Correspondingly, the direct link auxiliary information includes: in case of NACK or DTX, if NACK or DTX is received N times continuously, the first indication information is reported to the higher layer, and step 12 may include:
step 123, when the upper layer of the first terminal continuously receives the NACK or DTX for P times or receives the first indication information reported by the physical layer, or when the upper layer of the first terminal receives the NACK or DTX for P times or receives the first indication information reported by the physical layer within a third time window, or when the ratio of the number of times that the upper layer of the first terminal receives the NACK or DTX or receives the first indication information reported by the physical layer to the number of times that the upper layer of the first terminal sends data exceeds a preset threshold, performing a resource reselection operation or a change operation of a sensing mode or a change operation of a transmission mode on the transmission between the first terminal and the second terminal; wherein P is a positive integer.
The through link assistance information includes: when CSI is received for N times, if RSRP, RSSI, RSRQ, CRI, channel gain, channel loss, interference condition and noise signals in the CSI are higher or lower than a certain threshold value continuously, second indication information is reported to a high layer; step 12 may include:
and step 124, the high layer of the first terminal performs at least one of resource pool reselection operation and open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the CQI, PMI, RI, RSRP, RSSI, RSRQ, CRI, channel gain, channel loss, interference condition, vehicle motion condition, and noise signal, or the second indication information reported by the physical layer.
Specifically, if the CSI is long-term CSI, the higher layer of the first terminal performs a resource pool reselection operation or an open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition, and the noise signal, or the second indication information.
Wherein the performing a resource pool reselection operation on the transmission between the first terminal and the second terminal comprises: according to a resource pool configured by the network equipment, directly carrying out resource pool reselection operation on the transmission between the first terminal and the second terminal; or sending a resource pool reselection request to network equipment, and performing resource pool reselection operation on transmission between the first terminal and the second terminal by the network equipment;
the performing a resource pool reselection operation on the transmission between the first terminal and the second terminal includes: directly performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal; or sending an open-loop power control parameter adjustment request to network equipment, and performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal by the network equipment.
In the above embodiment of the present invention, the direct link auxiliary information includes, but is not limited to, the SFCI and the CSI, and may further include other related information.
An embodiment of the present invention further provides an operation method of transmission, where the method includes:
the second terminal sends the direct link auxiliary information to the first terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
Wherein the through link assistance information comprises: direct link feedback control information SFCI and/or direct link channel state information CSI.
Wherein the through link feedback control information SFCI includes: negative acknowledgement NACK or discontinuous transmission DTX;
the CSI includes: at least one of a channel quality indication CQI, a precoding matrix indication PMI, a rank indication RI, a reference signal received power RSRP, a received signal strength indication RSSI, and a noise signal.
Wherein the operations comprise: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
It should be noted that the second terminal is a receiving end of information corresponding to the first terminal, and a transmitting end of direct link information, and all implementation manners of the second terminal in the above embodiments are applicable to the embodiment of the method, and the same technical effect can be achieved.
As shown in fig. 2, an embodiment of the present invention further provides a terminal 20, where the terminal is a first terminal, and includes: a transceiver 21, configured to receive the direct link auxiliary information sent by the second terminal;
a processor 22, configured to operate transmission between the first terminal and the second terminal according to the direct link auxiliary information.
The through link assistance information includes: direct link feedback control information SFCI and/or direct link channel state information CSI.
The SFCI includes: negative acknowledgement NACK or discontinuous transmission DTX; the NACK or DTX indicates that the second terminal does not detect the direct link control information SCI or demodulates the direct link data erroneously;
the CSI includes: at least one of a channel quality indication CQI, a precoding matrix indication PMI, a rank indication RI, a reference signal received power RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a CSI-RS resource indication CRI, a channel gain, a channel loss, an interference condition, a vehicle motion condition, and a noise signal.
The operations include: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
The through link assistance information includes: in case of NACK or DTX, when the physical layer is specifically configured to continuously receive the NACK or DTX N times, the processor 22 performs a resource reselection operation or a sensing mode change operation or a transmission mode change operation on the transmission between the first terminal and the second terminal, where N is a positive integer.
In the direct link multicast communication, the direct link assistance information includes: in NACK or DTX, the transceiver 21 is further configured to: and when receiving the direct link auxiliary information sent by the second terminals with the number larger than a preset number, the first terminal and the second terminals carry out multicast retransmission, otherwise, unicast retransmission is carried out.
The through link assistance information includes: at CSI, the processor 22 is configured to perform, at the physical layer, at least one of a modulation and coding scheme, MCS, closed-loop power control parameter, resource pool reselection, and open-loop power control parameter adjustment on a transmission between the first terminal and the second terminal according to at least one of the CQI, PMI, RI, RSRP, RSSI, RSRQ, CRI, channel gain, channel loss, interference condition, vehicle motion, and noise signals.
After the physical layer of the first terminal receives the direct link auxiliary information sent by the second terminal, the transceiver is further configured to send the direct link auxiliary information or the indication information to a higher layer of the first terminal on the physical layer, where the higher layer includes a medium access control MAC layer. Wherein, the indication information is sent to the higher layer when the physical layer receives the NACK or DTX M times continuously, or receives the NACK or DTX M times within a second time window, or when a ratio of the number of times of receiving the NACK or DTX and the number of times of sending data exceeds a preset threshold, where M is a positive integer.
The through link assistance information includes: when NACK or DTX is received, the processor performs resource reselection operation or performs sensing mode change operation or transmission mode change operation on transmission between the first terminal and the second terminal when a high layer is configured to continuously receive P times of NACK or DTX or receive first indication information reported by a physical layer, or when the high layer of the first terminal receives P times of NACK or DTX or receives first indication information reported by the physical layer within a third time window, or when a ratio of the times of NACK or DTX received by the high layer of the first terminal or the times of receiving the first indication information reported by the physical layer to the times of sending data of the first indication information exceeds a preset threshold; wherein P is a positive integer.
The through link assistance information includes: in case of CSI, the processor 22 is specifically configured at a higher layer to: and performing at least one of a resource pool reselection operation and an open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the RSRP, the RSSI, the RSRQ, the CRI, a channel gain, a channel loss, an interference condition, a vehicle motion condition and a noise signal.
The performing a resource pool reselection operation on the transmission between the first terminal and the second terminal includes: according to a resource pool configured by the network equipment, directly carrying out resource pool reselection operation on the transmission between the first terminal and the second terminal; or sending a resource pool reselection request to network equipment, and performing resource pool reselection operation on transmission between the first terminal and the second terminal by the network equipment;
the operation of adjusting the open-loop power control parameter for the transmission between the first terminal and the second terminal includes: directly performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal; or sending an open-loop power control parameter adjustment request to a network device, and performing, by the network device, an open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal.
It should be noted that the embodiment of the terminal is a terminal corresponding to the method on the first terminal side in the embodiment shown in fig. 1, and all the implementation manners in the embodiment of the method are applicable to the embodiment of the terminal, and the same technical effect can be achieved. The terminal may include: a memory 23; the transceiver 21 and the processor 22, and the transceiver 21 and the memory 23 may be connected through a bus interface, and the functions of the transceiver 21 may be implemented by the processor 22, and the functions of the processor 22 may also be implemented by the transceiver 21.
An embodiment of the present invention further provides a terminal, where the terminal is a second terminal, and the terminal includes:
a transceiver for transmitting the through link assistance information to the first terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
All the implementation manners in the method of the second terminal side are applicable to the embodiment of the terminal, and the same technical effect can be achieved.
An embodiment of the present invention further provides a terminal, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. A method of operation of a transmission, the method comprising:
the first terminal receives the direct link auxiliary information sent by the second terminal;
and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
2. The method of claim 1, wherein the pass-through link assistance information comprises: direct link feedback control information SFCI and/or direct link channel state information CSI.
3. The method of claim 2, wherein the transmission is received from a wireless device,
the SFCI includes: negative acknowledgement NACK or discontinuous transmission DTX;
the CSI includes: at least one of a channel quality indication CQI, a precoding matrix indication PMI, a rank indication RI, a reference signal received power RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a CSI-RS resource indication CRI, a channel gain, a channel loss, an interference condition, a vehicle motion condition, and a noise signal.
4. The method of claim 3, wherein the operation comprises: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
5. The method of claim 4, wherein the pass-through link assistance information comprises: in case of NACK or DTX, the first terminal operates transmission between the first terminal and the second terminal according to the direct link assistance information, including:
when the physical layer of the first terminal continuously receives the NACK or DTX for N times, or the first terminal receives the NACK or DTX for N times within a first time window, or a ratio of the number of times that the first terminal receives the NACK or DTX and the number of times that the first terminal sends data exceeds a preset threshold, performing a resource reselection operation or a sensing mode changing operation or a transmission mode changing operation on transmission between the first terminal and the second terminal, where N is a positive integer.
6. The method of claim 4, wherein the direct link assistance information comprises, in direct link multicast communication: in case of NACK or DTX, the method further includes:
and when the physical layer of the first terminal receives the direct link auxiliary information sent by the second terminals with the number larger than a preset number, the first terminal and the second terminals carry out multicast retransmission, otherwise, unicast retransmission is carried out.
7. The method of claim 4, wherein the pass-through link assistance information comprises: during CSI, the first terminal operates transmission between the first terminal and the second terminal according to the direct link auxiliary information, including:
and the physical layer of the first terminal performs at least one of Modulation and Coding Scheme (MCS) adjustment operation, closed-loop power control parameter adjustment operation, resource pool reselection operation and open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the CQI, the PMI, the RI, the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition and the noise signal.
8. The method of claim 3, wherein after the physical layer of the first terminal receives the direct link assistance information sent by the second terminal, the method further comprises:
and the physical layer of the first terminal sends the through link auxiliary information or the indication information to a high layer of the first terminal, wherein the high layer comprises a Medium Access Control (MAC) layer.
9. The method of claim 8, wherein the pass-through link assistance information comprises: in case of NACK or DTX, the first terminal operates transmission between the first terminal and the second terminal according to the direct link assistance information, including:
when the high layer of the first terminal continuously receives the NACK or DTX or the indication information P times, or when the high layer of the first terminal receives the NACK or DTX or the indication information P times within a third time window, or when the ratio of the number of times that the high layer of the first terminal receives the NACK or DTX or the number of times that the indication information is transmitted to the number of times that the high layer of the first terminal transmits data exceeds a preset threshold, performing a resource reselection operation or a change operation of a sensing mode or a change operation of a transmission mode on transmission between the first terminal and the second terminal; wherein P is a positive integer.
10. The method of claim 8, wherein the indication information is sent to a higher layer when the physical layer receives the NACK or DTX M times consecutively, or receives the NACK or DTX M times within a second time window, or receives the NACK or DTX M times in proportion to the number of times it sends data, wherein M is a positive integer.
11. The method of claim 8, wherein the pass-through link assistance information comprises: during CSI, the first terminal operates transmission between the first terminal and the second terminal according to the direct link auxiliary information, including:
and the high layer of the first terminal performs at least one of resource pool reselection operation and open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal according to at least one of the RSRP, the RSSI, the RSRQ, the CRI, the channel gain, the channel loss, the interference condition, the vehicle motion condition and the noise signal or the indication information.
12. The method of claim 7 or 11, wherein the transmission is transmitted from the first network node to the second network node,
the performing a resource pool reselection operation on the transmission between the first terminal and the second terminal includes: according to a resource pool configured by the network equipment, directly carrying out resource pool reselection operation on the transmission between the first terminal and the second terminal; or sending a resource pool reselection request to network equipment, and performing resource pool reselection operation on transmission between the first terminal and the second terminal by the network equipment;
the performing an open-loop power control parameter adjustment operation on the transmission between the first terminal and the second terminal includes: directly performing open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal; or sending an open-loop power control parameter adjustment request to a network device, and performing, by the network device, an open-loop power control parameter adjustment operation on transmission between the first terminal and the second terminal.
13. A method of operation of a transmission, the method comprising:
the second terminal sends the direct link auxiliary information to the first terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
14. The method of claim 13, wherein the pass-through link assistance information comprises: direct link feedback control information SFCI and/or direct link channel state information CSI.
15. The method of claim 14, wherein the transmission is received from a wireless device,
the through link feedback control information SFCI includes: negative acknowledgement NACK or discontinuous transmission DTX;
the CSI includes: at least one of a channel quality indication CQI, a precoding matrix indication PMI, a rank indication RI, a reference signal received power RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a CSI-RS resource indication CRI, a channel gain, a channel loss, an interference condition, a vehicle motion condition, and a noise signal.
16. The method of claim 15, wherein the operation comprises: at least one of a resource reselection, a change in a perceptual mode, a change in a transmission mode, a modulation and coding scheme, MCS, a resource pool reselection, a closed loop power control parameter adjustment, and an open loop power control parameter adjustment.
17. A terminal, wherein the terminal is a first terminal, comprising:
the transceiver is used for receiving the direct link auxiliary information sent by the second terminal;
a processor configured to operate transmission between the first terminal and the second terminal according to the direct link auxiliary information.
18. A terminal, wherein the terminal is a second terminal, comprising:
a transceiver for transmitting the through link assistance information to the first terminal; and the first terminal operates the transmission between the first terminal and the second terminal according to the through link auxiliary information.
19. A terminal, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any of claims 1 to 12 or the method of any of claims 13 to 16.
20. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 12 or the method of any of claims 13 to 16.
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