WO2010124450A1

WO2010124450A1 - Semi-persistent scheduling sps abnormal retransmission processing method and terminal device

Info

Publication number: WO2010124450A1
Application number: PCT/CN2009/071514
Authority: WO
Inventors: 权威; 姜怡; 张戬
Original assignee: 华为技术有限公司
Priority date: 2009-04-28
Filing date: 2009-04-28
Publication date: 2010-11-04
Also published as: CN102308510A

Abstract

A Semi-Persistent Scheduling SPS abnormal retransmission processing method includes that: after an adaptive retransmission command has been received, if the SPS activation command or the SPS reactivation command is determined to be lost, the adaptive retransmission command is not executed. A terminal device includes: a receiving unit for receiving the adaptive retransmission command, a determination unit for determining the loss of the SPS activation command or the SPS reactivation command after the adaptive retransmission command has been received, and a control unit for controlling that the adaptive retransmission command is not executed after the SPS activation command or the SPS reactivation command has been determined to be lost.

Description

Semi-static scheduling SPS abnormal retransmission processing method and terminal device

The present invention relates to the field of communications technologies, and in particular, to a method and a terminal device for semi-statically scheduling SPS abnormal retransmission.

Background technique

Long Term Evolved (LTE) is an evolutionary network of Universal Mobile Telecommunication System (UMTS). In LTE networks, there are two resource scheduling modes: One is Dynamic Scheduling (DS). The eNodeB does not have a fixed restriction on the scheduling of resources, and dynamically allocates resources to the data to be transmitted. If the user equipment (User Equipment, UE) needs to transmit data again, the UE resends the scheduling request to request resources from the eNodeB. The other is Semi-Persistent Scheduling (SPS). The eNodeB uses the activated or modified SPS command to bring the resources and modulation code scheme (MAS) allocated for the UE to the UE, and the subsequent UE period is used. These resources transfer data, and do not need to send a scheduling request to request resources every time data is transmitted.

In the prior art, after the UE sends the uplink data packet, the sent data packet is stored in a transmission buffer corresponding to a Hybrid Automatic Repeat Request (HARQ) process, and is used for subsequent retransmission, and Received HARQ feedback information, such as acknowledgement (ACK) or negative acknowledgement (NACK), and/or uplink grant (UL grant) to perform processing on the transmit buffer: if only NACK feedback is received, perform synchronization non-self Adapting to retransmission, sending data continues to buffer; if only ACK feedback is received, the data packet is continuously buffered, and no retransmission or new transmission operation is performed; if NACK feedback and adaptive retransmission command are received, synchronous adaptive retransmission is performed. The sending data continues to be cached; if the ACK feedback and the new data transmission command are received, that is, if it is an SPS, in order to receive the SPS activation command or the SPS reactivation command, the new data packet is re-encapsulated for transmission, and the new data packet is replaced. There are packets in the cache for storage. However, in the prior art, if the SPS activation command or the SPS reactivation command is lost, when the UE receives the subsequent adaptive retransmission command, the UE retransmits the data packet in the buffer, and the data packet is not expected to be received by the eNodeB. The data packet causes the transmission of redundant packets, wasting transmission resources. Summary of the invention

The embodiment of the invention provides a processing method and a terminal device for semi-persistent scheduling SPS abnormal retransmission, which can prevent redundant packet transmission.

In view of this, the embodiments of the present invention provide:

A semi-persistent scheduling method for processing SPS abnormal retransmissions includes:

After receiving the adaptive retransmission command, if it is determined that the SPS activation command or the SPS reactivation command is lost, the adaptive retransmission command is not executed.

A terminal device, comprising:

a receiving unit, configured to receive an adaptive retransmission command;

a determining unit, configured to determine that the SPS activation command or the SPS reactivation command is lost after receiving the adaptive retransmission command;

And a control unit, configured to control not to execute the adaptive retransmission command after determining that the SPS activation command or the SPS reactivation command is lost.

After receiving the adaptive retransmission command, the embodiment of the present invention does not perform the adaptive retransmission command when the SPS activation command or the SPS reactivation command is lost, thereby preventing the transmission of the redundant packet and avoiding wasting the transmission resource.

DRAWINGS

1 is a processing method of SPS abnormal retransmission provided by Embodiment 1 of the present invention;

2 is a processing method of SPS abnormal retransmission provided by Embodiment 2 of the present invention;

3 is a processing method of SPS abnormal retransmission provided by Embodiment 3 of the present invention;

4 is a processing method of SPS abnormal retransmission provided by Embodiment 4 of the present invention;

FIG. 5 is a structural diagram of a terminal device according to Embodiment 5 of the present invention.

detailed description

Embodiment 1:

Referring to FIG. 1, a first embodiment of the present invention provides a method for processing a semi-persistent scheduling SPS abnormal retransmission, where the method includes:

101. Receive an adaptive retransmission command.

102. If it is determined that the SPS activation command or the SPS reactivation command is lost, the adaptive retransmission command is not executed. After receiving the adaptive retransmission command, the first embodiment of the present invention does not perform an adaptive retransmission command when the SPS activation command or the SPS reactivation command is lost, thereby preventing the transmission of redundant packets and avoiding wasting transmission resources.

Embodiment 2:

Referring to FIG. 2, a second embodiment of the present invention provides a method for processing an SPS abnormal retransmission, and the method includes:

201. The physical downlink control channel (PDCCH) signaling of the base station transmitting the SPS activation command or the SPS reactivation command is lost. If the UE does not receive the PDCCH signaling, the UE does not use the PDCCH signaling indication. The uplink transmission resource sends uplink data.

The PDCCH signaling in the step includes: a UL grant, a Modulation Code Scheme (MCS), a Redundancy Version (RV), and a new data indicator (New Data Indicator) for indicating uplink transmission resource information. , NDI) and other HARQ information, in the signaling, NDI = 0, identifying that the PDCCH signaling transmission is an SPS activation instruction or an SPS reactivation instruction. The PDCCH signaling is masked by using a Semi-Persistent Scheduling Cell Radio Network Temporary Identifier (SPS-C-RNTI) to indicate that the UL grant is used for SPS scheduling.

In this step, the UE cannot receive the PDCCH signaling, and therefore cannot use the uplink transmission resource indicated by the UL grant to send the uplink data.

202. The base station does not receive uplink data of the UE on the uplink transmission resource, and sends the uplink data to the UE.

The NACK feedback, and the adaptive retransmission command, the adaptive retransmission command may include: a UL grant indicating uplink transmission resource information, a modulation coding mode MCS information, a redundancy version RV, and new data indicating HARQ information such as NDI, the command NDI = 1.

203. The UE determines whether the HARQ process corresponding to the adaptive retransmission command is used by Dynamic Scheduling (DS) or Semi-Persistent.

Scheduling, SPS), if used by SPS, perform step 204; if used by DS, perform step 205.

204. The UE performs an adaptive retransmission command, and transmits data in the transmission buffer in the HARQ process corresponding to the adaptive retransmission command according to the configured SPS resource, and ends the process. 205. The UE determines whether the MCS information carried in the received adaptive retransmission command is complete. If the MCS information is incomplete, step 206 is performed. If the MCS information is complete, step 207 is performed.

The manner of determining whether the MCS information is complete in the step may be: when the redundancy version RV=0 in the adaptive retransmission command, confirming that the MCS information in the adaptive retransmission command is a complete coding mode; The redundancy version RV=1, 2 or 3 in the adaptive retransmission command confirms that the MCS information used in the adaptive retransmission is the same as the MCS information used in the previous transmission, because the SPS is activated for the first time carrying the MCS information. The command or the SPS reactivation command is lost. Therefore, the MCS information carried in the adaptive retransmission command is incomplete.

206. The UE ignores the adaptive retransmission command, and performs step 208.

Since there is no complete MCS information, the UE cannot modulate and encode the data by using the modulation and coding mode allocated by the base station, so the adaptive retransmission command is ignored.

207. The UE processes the adaptive retransmission command as a new transmission command, and extracts a new data packet, that is, a MAC (Medium Access Control) PDU (Protocol Data Unit) from the multiplexing/demultiplexing entity. And transmitting, according to the uplink transmission resource, the MCS information, and the HARQ information indicated by the UL grant in the adaptive retransmission command, and storing the MAC PDU in a sending buffer of the corresponding HARQ process, but not using the adaptive retransmission command As an SPS activation command or an SPS reactivation command process, the uplink transmission resource (the resource allocated by the base station) indicated by the UL Grant carried in the adaptive retransmission command is not configured as the SPS resource.

208. Determine whether the current UE has configured the uplink SPS resource, and if yes, execute 209. If no, end the process.

209. The UE releases the configured uplink SPS resource.

The second embodiment of the present invention determines whether the HARQ process corresponding to the adaptive retransmission command is occupied by the SPS, and determines the processing mode of the adaptive retransmission command. When the HARQ process is not occupied by the SPS, but is occupied by the DS, Sending a new data packet (that is, the above-mentioned MAC PDU) enables the UE to correctly process the adaptive retransmission command, ensuring that the data packet sent by the UE is a data packet that the base station wants to receive, thereby ensuring the validity of the data transmission and preventing redundancy. The transmission of the residual packet avoids wasting the transmission resource. Further, by judging the abnormal retransmission and releasing the configured uplink SPS resource in time, the terminal can prevent the terminal from continuing to use the wrong SPS resource for transmission, thereby avoiding the other terminal. interference.

Embodiment 3: Referring to FIG. 3, a third embodiment of the present invention provides a method for processing an SPS abnormal retransmission, where the method includes:

301-302 are the same as 201-202.

303. The UE determines whether the HARQ process corresponding to the adaptive retransmission command is used by the DS or is used by the semi-persistent scheduling SPS. If used by the SPS, step 304 is performed. If it is used by the DS, step 306 is performed.

304. The UE determines whether the HARQ process sending buffer corresponding to the adaptive retransmission command is empty. If it is empty, step 306 is performed. Otherwise, step 305 is performed.

305. The UE performs an adaptive retransmission command, and sends the data in the cache in the HARQ process corresponding to the adaptive retransmission command according to the configured SPS resource, and the process ends.

306. The UE determines whether the MCS information carried in the received adaptive retransmission command is complete. If the MCS information is incomplete, go to step 307. If the MCS information is complete, go to step 308.

307. The UE ignores the adaptive retransmission command, and performs step 309.

308. The UE processes the adaptive retransmission command as a new transmission command, and takes out a new data packet from the multiplexing/demultiplexing entity, that is, a MAC (Medium Access Control) PDU (Protocol).

The data unit, the protocol data unit, transmits the uplink transmission resource, the MCS information, and the HARQ information indicated by the UL grant in the adaptive retransmission command, and stores the MAC PDU in the transmission buffer of the corresponding HARQ process, but does not The adaptive retransmission command is configured as an SPS activation command or an SPS reactivation command, and the uplink transmission resource (the resource allocated by the base station) indicated by the UL Grant carried in the adaptive retransmission command is not configured as the SPS resource.

309 - 310 are the same as 208 - 209.

In the third embodiment of the present invention, whether the HARQ process corresponding to the adaptive retransmission command is occupied by the SPS last time, and if it is occupied by the SPS, and whether the cache is empty according to the HARQ process, determine the processing mode of the adaptive retransmission command. When the HARQ process is not occupied by the SPS or is called by the SPS, but the HARQ process sending buffer is empty, the new data packet (that is, the MAC PDU mentioned above) is sent to ensure that the data packet sent by the UE is a data packet that the base station wants to receive, thus ensuring that the data packet is sent by the UE. The validity of the data transmission prevents the transmission of the redundant packets and avoids wasting the transmission resources. Further, by judging the abnormal retransmission and releasing the configured uplink SPS resources in time, the terminal can prevent the terminal from continuing to use the wrong SPS resources. Transmission, to avoid interference with other terminals. Embodiment 4:

Referring to FIG. 4, a fourth embodiment of the present invention provides a method for processing an SPS abnormal retransmission, and the method includes:

401 - 402 are the same as 201 - 202.

403. The UE determines whether the HARQ process sending buffer corresponding to the adaptive retransmission command is empty. If it is empty, execute 406. If not, perform 404.

404. The UE determines whether the HARQ process corresponding to the adaptive retransmission command is used by the DS or is used by the SPS. If used by the SPS, step 405 is performed. If used by the DS, step 406 is performed.

405. The UE performs an adaptive retransmission command, and sends the data in the cache in the HARQ process corresponding to the adaptive retransmission command according to the configured SPS resource, and the process ends.

406. The UE determines whether the MCS information carried in the received adaptive retransmission command is complete. If the MCS information is incomplete, step 407 is performed. If the MCS information is complete, step 408 is performed.

407. The UE ignores the adaptive retransmission command, and performs step 409.

408. The UE processes the adaptive retransmission command as a new transmission command, and extracts a new data packet, that is, a MAC (Medium Access Control) PDU ( Protocol Data Unit) from the multiplexing/demultiplexing entity. And transmitting, according to the uplink transmission resource, the MCS information, and the HARQ information indicated by the UL grant in the adaptive retransmission command, and storing the MAC PDU in a sending buffer of the corresponding HARQ process, but not using the adaptive retransmission command As an SPS activation command or an SPS reactivation command process, the uplink transmission resource (the resource allocated by the base station) indicated by the UL Grant carried in the adaptive retransmission command is not configured as the SPS resource.

409 - 410 is the same as 208 - 209.

In the fourth embodiment of the present invention, whether the HARQ process is empty according to the HARQ process, and whether the HARQ process corresponding to the adaptive retransmission command is not occupied by the SPS, is determined to be processed by the SPS, and the HARQ process is determined in the HARQ process. When the sending buffer is empty or not called by the SPS, a new data packet (that is, the above-mentioned MAC PDU) is sent to ensure that the data packet sent by the UE is a data packet that the base station wants to receive, thereby ensuring the validity of the data transmission and preventing redundancy. Packets are sent to avoid wasting transmission resources. Further, by judging the abnormal retransmissions and releasing the configured uplink SPS resources in time, the terminal can prevent the terminal from continuing to use the wrong SPS resources for transmission, so as to avoid causing interference to other terminals. Disturb.

In the prior art, during the HARQ transmission process, the UE does not actively clear the transmission buffer of the HARQ process. In the second, third, and fourth embodiments of the present invention, when the HARQ process of the UE transmits new data, the newly transmitted data packet (ie, The MAC PDU is stored in the transmission buffer of the HARQ process. When the time when the data packet is stored in the HARQ process transmission buffer reaches a predetermined time period, the data packet in the HARQ process transmission buffer is cleared, specifically, the data packet is stored in the HARQ process. When the buffer is sent, the process sends a buffer clear timer. The maximum timer length can be set to the product of the maximum number of HARQ transmissions and the HARQ RTT (round trip time). After the timer expires, the UE clears the transmission buffer of the HARQ process.

Embodiment 5:

Referring to FIG. 5, a fifth embodiment of the present invention provides a terminal device, including:

The receiving unit 501 is configured to receive an adaptive retransmission command.

a determining unit 502, configured to determine, after receiving the adaptive retransmission command, that the SPS activation command or the SPS reactivation command is lost;

The control unit 503 is configured to control not to execute the adaptive retransmission command after determining that the SPS activation command or the SPS reactivation command is lost.

Optionally, the terminal device further includes: a sending unit 504,

The control unit 503 is further configured to control the sending unit 504 to send a new data packet according to the information carried in the adaptive retransmission command for data transmission.

Optionally, the determining unit 502 includes:

a first determining unit, configured to determine whether the hybrid automatic retransmission HARQ process corresponding to the adaptive retransmission command is used by the SPS last time;

a second determining unit, configured to determine whether the HARQ process sending buffer is empty;

The first determining unit is configured to determine that the SPS activation command or the SPS reactivation command is lost when the determination result of the first judging unit is no, or when the judgment result of the second judging unit is YES.

Optionally, the terminal device further includes a deleting unit, configured to delete the data packet in the HARQ process sending buffer when the time when the data packet is stored in the HARQ process sending buffer reaches a predetermined time period.

Optionally, the terminal device further includes a third determining unit, configured to determine SPS activation in the determining unit After the command or the SPS reactivation command is lost, it is determined whether the terminal device has configured the uplink SPS resource; and the resource release unit is configured to release the configured uplink SPS resource when the judgment result of the third determining unit is YES.

After receiving the adaptive retransmission command, the fifth embodiment of the present invention does not perform the adaptive retransmission command when the SPS activation command or the SPS reactivation command is lost, thereby preventing the transmission of redundant packets and avoiding wasting transmission resources; By releasing the abnormal retransmission judgment and releasing the configured uplink SPS resources in time, the terminal can prevent the terminal from continuing to use the wrong SPS resource for transmission, thereby avoiding interference to other terminals.

The foregoing describes the processing method and terminal of the semi-persistent scheduling SPS abnormal retransmission provided by the embodiment of the present invention. The description of the above embodiment is only used to help understand the method and core idea of the present invention. Meanwhile, the general technology in the field The present invention is not limited to the embodiments of the present invention. The details of the present invention are not limited to the embodiments of the present invention.

Claims

Rights request

A method for processing a semi-statically scheduled SPS abnormal retransmission, comprising: after receiving an adaptive retransmission command, if the SPS activation command is determined or the SPS reactivation command is lost, the adaptive retransmission is not performed. command.

2. The method of claim 1 wherein

After the determining the SPS activation command or the SPS reactivation command is lost, the method further includes: transmitting a new data packet according to the information used for data transmission carried in the adaptive retransmission command.

3. The method of claim 1 wherein:

The determining that the SPS activation command or the SPS reactivation command is lost includes:

When it is determined that the hybrid automatic retransmission HARQ process corresponding to the adaptive retransmission command is not

When the SPS is used, it is determined that the SPS activation command is lost or the SPS reactivation command is lost.

4. The method of claim 1 wherein:

When the HARQ process corresponding to the adaptive retransmission command is used by the SPS last time, if the HARQ process transmission buffer is empty, it is determined that the SPS activation command or the SPS reactivation command is lost.

5. The method of claim 1 wherein:

When it is determined that the HARQ process sending buffer corresponding to the adaptive retransmission command is empty, it is determined that the SPS activation command or the SPS reactivation command is lost.

6. The method of claim 1 wherein:

If the HARQ process corresponding to the adaptive retransmission command is not empty, if the HARQ process corresponding to the adaptive retransmission command is not used by the SPS last time, it is determined that the SPS activation command is lost or the SPS reactivation command is lost. .

The method according to claim 4 or 5, wherein the method further comprises: when the time when the data packet is stored in the HARQ process sending buffer reaches a predetermined time period, clearing the

The HARQ process sends the data packets in the cache.

The method according to any one of claims 1 to 6, characterized in that the SPS is determined After the live command or the SPS reactivation command is lost, the method further includes:

When it is determined that the uplink SPS resource has been configured, the configured uplink SPS resource is released.

9. A terminal device, comprising:

a receiving unit, configured to receive an adaptive retransmission command;

The terminal device according to claim 9, wherein the terminal device further comprises a sending unit,

The control unit is further configured to control, according to the information used for data transmission in the adaptive retransmission command, the sending unit to send a new data packet.

11. The terminal device according to claim 9, wherein:

The determining unit includes:

The first determining unit is configured to determine that the SPS activation command is lost or the SPS reactivation command is lost when the determination result of the first determining unit is negative.

12. The terminal device according to claim 9, wherein:

The determining unit includes:

The first determining unit is configured to determine that the SPS activation command or the SPS reactivation command is lost when the determination result of the second determining unit is YES.

The terminal device according to claim 12, further comprising:

And a deleting unit, configured to delete the data packet in the HARQ process sending buffer when the time when the data packet is stored in the HARQ process sending buffer reaches a predetermined time period.

The terminal device according to any one of claims 9 to 13, further comprising: a third determining unit, configured to determine the terminal after the determining unit determines that the SPS activation command or the SPS reactivation command is lost Whether the device has been configured with uplink SPS resources; The resource release unit is configured to release the configured upper S resource when the judgment result of the third determining unit is yes.