WO2007079085A2 - Method and system for implementing h-arq-assisted arq operation - Google Patents
Method and system for implementing h-arq-assisted arq operation Download PDFInfo
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- WO2007079085A2 WO2007079085A2 PCT/US2006/049306 US2006049306W WO2007079085A2 WO 2007079085 A2 WO2007079085 A2 WO 2007079085A2 US 2006049306 W US2006049306 W US 2006049306W WO 2007079085 A2 WO2007079085 A2 WO 2007079085A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1848—Time-out mechanisms
- H04L1/1851—Time-out mechanisms using multiple timers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1838—Buffer management for semi-reliable protocols, e.g. for less sensitive applications such as streaming video
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L2001/125—Arrangements for preventing errors in the return channel
Definitions
- the present invention is related to wireless communication systems. More particularly, the present invention is related to a method and system for implementing hybrid automatic repeat request (H-ARQ)-assisted automatic repeat request (ARQ) in a wireless communication system.
- H-ARQ hybrid automatic repeat request
- ARQ assisted automatic repeat request
- the system 100 includes a user equipment (UE) 110, a Node-B 120 and a radio network controller (RNC) 130.
- H-ARQ entities are located in a medium access control (MAC) layer 112 of the UE 110 and a MAC layer 122 of the Node-B 120.
- Packets are assigned transmission sequence numbers (TSNs) in an H-ARQ transmitter.
- An H-ARQ receiver receives the packets and attempts to decode the transmitted packets. If a packet is not decodable, the H-ARQ receiver sends a negative acknowledgment (NACK) back to the H-ARQ transmitter for retransmission of the failed packet.
- NACK negative acknowledgment
- the H-ARQ receiver sends a positive acknowledgment (ACK) for the packet to the H-ARQ transmitter.
- ACK positive acknowledgment
- the H-ARQ transmitter Upon receiving a NACK, the H-ARQ transmitter retransmits the packet if the number of retransmissions of the failed packet is less than a predetermined maximum limit, and the allowed transmission time for the failed packet has not expired. Otherwise, the failed packet is discarded and recovered at an ARQ level.
- ARQ entities are located in a radio link control (RLC) layer 114 of the UE 110 and an RLC layer 132 of the RNC 130. The ARQ entities handle the retransmission of the failed packet. The ARQ entities recover packets that are lost due to an NACK-to-ACK misinterpretation error at the H-ARQ level.
- the ARQ process in an RLC layer is quite complex with many options to perform status reporting.
- An H-ARQ assisted ARQ operation may be considered when both the H-ARQ and ARQ functions are co-located, such as in a universal mobile telecommunication systems (UMTS) Node-B or a long term evolution (LTE) evolved Node-B (eNode-B).
- UMTS universal mobile telecommunication systems
- LTE long term evolution
- FIG. 2 shows an example of an H-ARQ-assisted ARQ operation proposed for third generation partnership project (3GPP) standards.
- a transmitter 250 includes an ARQ transmitter 252 and an H-ARQ transmitter 254.
- a receiver 260 includes an ARQ receiver 262 and an H-ARQ receiver 264.
- the H-ARQ transmitter 254 provides a local ACK or a local NACK to the ARQ transmitter 252.
- ARQ transmitter 254 fails the H-ARQ transmission, (e.g., due to maximum retransmission limit).
- the ARQ transmitter 252 sends an ARQ protocol data unit (PDU) x to the H-ARQ transmitter 254 (step 202).
- the H-ARQ transmitter 254 sends the ARQ PDU x to the H-ARQ receiver 264 (step 204).
- the ARQ PDU x is not decodable and the H-ARQ receiver 264 sends a NACK to the H-ARQ transmitter 254 (step 206).
- the H-ARQ transmitter 254 retransmits the ARQ PDU x to the H-ARQ receiver 264 (step 208).
- the ARQ PDU x is still not decodable and the H-ARQ receiver 264 sends another NACK to the H-ARQ transmitter 254 (step 210). At such a point, it is determined that the number of retransmissions for the ARQ PDU x reaches a maximum retransmission limit (step 212).
- the H-ARQ transmitter 254 then sends a local NACK for the ARQ PDU x to the ARQ transmitter 252 (step 214).
- a local NACK may also be generated when an NACK-to-ACK error is reported from the H-ARQ receiver 264 to the H-ARQ transmitter 254.
- the ARQ transmitter 252 sends an ARQ PDU y to the H-ARQ transmitter 254 (step 216).
- the H-ARQ transmitter 254 transmits the ARQ PDU y to the H-ARQ receiver 264 (step 218).
- the ARQ PDU y is not decodable and the H-ARQ receiver 264 sends a NACK to the H-ARQ transmitter 254 (step 220).
- the NACK is misinterpreted as an ACK by the H-ARQ transmitter 254 and the H-ARQ transmitter 254 treats the ARQ PCU y as successfully transmitted.
- the H-ARQ receiver 264 detects an NACK-to-ACK error, (e.g., when the H-ARQ receiver 264 receives a new PDU via the same H-ARQ process while waiting for retransmission of the ARQ PDU y), (step 222).
- the H-ARQ receiver 264 sends a NACK-to-ACK error indicator to the H-ARQ transmitter 254 (step 224).
- the H-ARQ transmitter 254 Upon receipt of the NACK-to-ACK error indicator, the H-ARQ transmitter 254 sends a local NACK to the ARQ transmitter 252 and the ARQ PDU y is recovered at an ARQ level (step 226).
- a local ACK is generated when none of the above two events for an ARQ packet occurs during a predefined time interval.
- the ARQ transmitter 252 sends an ARQ PDU z to the H-ARQ transmitter 254 (step 228).
- the H-ARQ transmitter 254 transmits the ARQ PDU z to the H- ARQ receiver 364 (step 230).
- the ARQ PDU z is successfully decoded and the H-ARQ receiver 264 sends the ARQ PDU z to the ARQ receiver 262 (step 232), and sends an ACK to the H-ARQ transmitter 254 (step 234).
- the H-ARQ transmitter 254 sends a local ACK to the ARQ transmitter 252 (step 238).
- the ARQ transmitter 252 will discard the packet from a transmit buffer after receiving the local ACK from the H-ARQ transmitter 254.
- the H-ARQ transmitter informs the ARQ transmitter the segment that is lost, (not the ARQ PDU). If the ARQ PDU is retransmitted, the H-ARQ transmitter will retransmit the complete packet, not only the missing segment. It is also unclear how to recover the last packet of the H-ARQ transmission.
- the present invention is related to a method and system for implementing H-ARQ-assisted ARQ in a wireless communication system.
- An H-ARQ receiver determines whether an H-ARQ NACK-to-ACK error occurs. When an H-ARQ NACK-to-ACK error occurs, the H-ARQ receiver sends an H- ARQ error indicator to the H-ARQ transmitter unless the number of retransmissions of the failed packet has reached a maximum retransmission limit, a maximum time for delivery of the failed packet has expired and/or a lifespan of the failed packet has expired.
- the H-ARQ transmitter tries to recover the failed packet.
- the H-ARQ transmitter sends a local NACK to the ARQ transmitter if the maximum retransmission limit has been reached, the maximum, delivery time has expired or the lifespan of the failed packet has expired, so that the failed packet can be recovered at an ARQ level.
- the H- ARQ receiver sends a local NACK to the ARQ receiver if the H-ARQ receiver does not receive the failed packet before certain conditions occur. Based on reception of the local NAK, the ARQ receiver may send a status report to the ARQ transmitter for recovery of the failed packet.
- Figure 1 shows a conventional wireless communication system
- Figure 2 shows an example of an H-ARQ-assisted ARQ operation proposed for third generation partnership project (3GPP) standards.
- Figure 3 is a signaling diagram of a process for implementing an
- FIG. 3 is a signaling diagram of a process 400 for implementing an H-ARQ-assisted ARQ operation in a wireless communication system 300 in accordance with the present invention.
- the system 300 includes a transmitter 310 and a receiver 320.
- the transmitter 310 includes an ARQ transmitter 312 and an H-ARQ transmitter 314.
- the receiver 320 includes an ARQ receiver 322 and an H-ARQ receiver 324.
- H-ARQ error indication timer is defined as the amount of time that an H-ARQ receiver should wait for a retransmission of the failed packet before sending an HARQ error indicator. It is preferable to keep the H-ARQ error indication timer constant for the whole system for simple implementation. However, the H-ARQ error indication timer may be adjusted based on the quality of service (QoS) requirements. For example, the length of the H-ARQ error indication timer may be linked to the scheduling priority.
- QoS quality of service
- NRetransmission Maximum number of retransmissions allowed for a packet. The maximum number of retransmissions may be based on the QoS requirements, and be configured per service type.
- TjoeUveiy Maximum delivery time allowed for successful delivery of the packet after the first transmission. The maximum delivery time may be based on the QoS requirements, (e.g., a block error rate, latency, or the like), and be configured per service type.
- TR ⁇ coverySync For synchronous H-ARQ, a time within which the H- ARQ receiver expects to receive a failed packet after transmitting an H-ARQ error indicator.
- TnecoveryAsync For asynchronous H-ARQ, a time within which the H-ARQ receiver expects to receive a failed packet after transmitting an H- ARQ error indicator.
- the tuner may be associated with the QoS requirements, and be configured per service type. For example, the length of the timer may be linked to the scheduling priority.
- WHARQ A window, (i.e., the number of packets), within which a failed packet should be received. If the failed packet is not received within WHAKQ, it is assumed lost.
- the transmitter 310 and the receiver 320 may also be given with a parameter for a lifespan of a packet, (i.e., the maximum time to transmit the packet).
- the parameters may be provided by a central node to the H-ARQ receiver 324 and the H-ARQ transmitter 314. If the parameters are defined per service type, the parameters may be given to the H-ARQ receiver 324 and the H-ARQ transmitter 314 at the start of that service.
- the maximum number of retransmissions and/or the lifespan of a packet may be dynamically changed depending on the QoS requirements.
- the maximum number of transmissions may be indicated by either explicitly identifying the number of transmissions in the associated signaling or identifying a MAC flow that is associated with a configured maximum number of transmissions.
- the number of retransmissions per packet is indicated in the associated control signaling for the first transmission.
- each MAG flow may be associated with a certain number of retransmissions and by identifying the MAC flow in the associated control signaling for the first transmission, the maximum number of transmissions may be indicated.
- the identified MAC flow is translated to the maximum number of transmisisons configured by the receiver.
- the maximum number of retransmissions may also be known by an H-ARQ process ID if specific H-ARQ processes are dedicated to a MAC flow for a set of MAC flows. Alternatively, a flag may be set in the associated signaling to indicate last transmission.
- a process 400 for implementing an H-ARQ-assisted ARQ operation in accordance with the present invention is explained hereafter with reference to Figure 3.
- the H-ARQ transmitter 314 transmits a packet to the H-ARQ receiver 324 (step 402). If the packet is successfully received, the H- ARQ receiver 324 sends the packet to the ARQ receiver 322 (not shown in Figure 3).
- the H-ARQ receiver 324 sends a NACK to the H-ARQ transmitter 314 (step 404). After sending the NACK in step 404, the H-ARQ receiver 324 determines whether an H-ARQ NACK-to-ACK error occurs (step 406). Upon detection of the H-ARQ NACK- to-ACK error, the H-ARQ receiver 324 generates, and sends, an H-ARQ NACK-to-ACK error indicator to the H-ARQ transmitter 314 (step 408). [0029] For synchronous H-ARQ transmission, the time of a H-ARQ retransmission is known to the receiver.
- the H-ARQ receiver 324 determines that an H-ARQ NACK-to-ACK error occurs and sends an H-ARQ NACK-to-ACK error indicator unless the failed packet has been transmitted for the maximum number of retransmissions.
- a timer TErrorindicator is set at the H-ARQ receiver 324 when the maximum number of retransmission has not been reached and the H-ARQ receiver 324 sends a NACK to the H-ARQ transmitter 314 at step 404. If the failed packet is successfully received before the timer TErrorindicator expires, the timer TErrorindicator is reset to zero and the H- ARQ NACK-to-ACK error indicator is not generated.
- the H-ARQ receiver 324 determines that an H-ARQ NACK-to-ACK error occurs and sends an H-ARQ NACK-to-ACK error indicator to the H-ARQ transmitter 314 unless the number of transmissions of the failed packet has reached the maximum retransmission limit, the maximum delivery time for the packet, (TDeiivery), has expired, and/or the lifespan of the failed packet has expired.
- the H-ARQ NACK-to-ACK error indicator is sent from the H-
- the H-ARQ receiver 324 to the H-ARQ transmitter 314 to inform about a NACK-to- ACK misinterpretation at the H-ARQ transmitter 314.
- the H-ARQ NACK-to- ACK error indicator is associated with a particular H-ARQ process and a particular packet in the H-ARQ process.
- the H-ARQ NACK-to-ACK error indicator contains H-ARQ process identity (ID) and a TSN to identify the packet ID in the H-ARQ process.
- the H-ARQ process ID and the TSN may be removed since a fixed timing relationship between the failed transmission and the error report can be used to associate the H-ARQ NACK- to-ACK error indicator with an H-ARQ process ID and a packet TSN.
- the H-ARQ NACK-to-ACK error indicator may be sent after time t of receiving the packet with a TSN n for which the NACK-to-ACK error happened.
- An H-ARQ NACK-to-ACK error indicator packet may be independent of the H-ARQ operation. This is achieved by sending the process identity (if needed) and time offset to identify reception time of the received error.
- the H-ARQ NACK-to-ACK error indicator may be sent as a physical layer signal at a fixed time offset after the reception of the received error packet .
- the packets have their own cyclic redundancy check (CRC) and one H-ARQ NACK-to-ACK error indicator may be used to send NACK-to-ACK error indications for several packets.
- CRC cyclic redundancy check
- the H-ARQ NACK-to-ACK error indicator may contain multiple H-ARQ process IDs, associated packet TSNs and/or timing offset.
- the H-ARQ NACK-to-ACK error indicator may have its own CRC to ensure reliable transmission. This allows MAC or RLC layer signaling for H-ARQ NACK-to-ACK error indication.
- the H-ARQ NACK-to-ACK error indicator packet may be created either at H-ARQ or ARQ level.
- the H-ARQ transmitter 314 may send an ACK to the H-ARQ receiver 324 (step 410).
- the H-ARQ receiver 324 may repeatedly send the H-ARQ NACK-to-ACK error indicator until the H-ARQ receiver 324 receives an ACK from the H-ARQ transmitter 314 or radio link fails.
- the H-ARQ transmitter 314 tries to recover the error at an H-ARQ level by retransmitting the failed packet unless the maximum retransmission limit has reached, the maximum delivery time has expired, and/or the lifespan of the failed packet has expired (step 412).
- the H-ARQ transmitter 314 may send a local NACK to the ARQ transmitter 312 so that the failed packet can be recovered at an ARQ level (step 414).
- the H-ARQ transmitter 314 sends the local NACK to the ARQ transmitter 312 only if the maximum number of retransmissions has been reached, the maximum delivery time for transmission of the failed packet has expired, or the lifespan of the failed packet has expired.
- the H-ARQ receiver 324 upon successful delivery of a packet, sends an ACK to the H-ARQ transmitter 314 and the H-ARQ transmitter 314 sends a local ACK to the ARQ transmitter 312.
- the H-ARQ transmitter 314 may or may not send a local ACK to the ARQ transmitter 312 in such situation.
- the H-ARQ receiver 324 determines at step 416 whether the H-ARQ receiver 324 does not receive the failed packet successfully before at least one of the following conditions:
- TnecoverySync for synchronous H-ARQ transmission
- TRe ⁇ veiyAsync for asynchronous H-ARQ transmission
- the H-ARQ receiver 324 sends a local NACK to the ARQ receiver 322 (step 418). Upon reception of the local NACK, the ARQ receiver 322 may send a status report to the ARQ transmitter 312 to recover the failed packet (step 420).
- the mapping between an ARQ PDU and an H-ARQ PDU is not relevant as long as the H- ARQ receiver 324 is able to identify the ARQ PDU that needs to be recovered.
- the ARQ buffer at the ARQ transmitter 312 may be emptied after receiving the status report from the ARQ receiver 322. The status report for the failed packet contains the information about successfully received packets.
- the ARQ receiver 322 may send a status report after receiving N consecutive packets successfully or expiration of a timer.
- the ARQ transmitter 312 may poll the ARQ receiver 322 after transmitting the last packet in the buffer. The reason for polling is to recover early from the NACK-to-ACK error at an H-ARQ level for the last packet. Setting the "Poll bit for the last packet" is a configurable parameter for a data flow.
- a special small packet with a last packet indication may be sent from the H-ARQ transmitter 314 after the H-ARQ buffer is empty.
- the transmission of the special packet with a last packet indication ensures early recovery of the loss of the last packet at the H-ARQ level.
- the H-ARQ receiver 324 sends a response back to the H-ARQ transmitter 314 upon receiving the special packet.
- the response packet may be a new packet generated at an H- ARQ level indicating the last TSN received.
- the response packet may be sent by using an H-ARQ error indication packet indicating that it is a response to the small packet.
- a null transmission may be sent after the last data packet in an H-ARQ transmission queue to invoke the ACK check on the previous transmission.
- a null packet only includes control information (i.e., no payload).
- the H-ARQ transmitter 314 transmits the null packet after reception of an H-ARQ ACK for the last data packet in the H-ARQ transmission queue.
- the H-ARQ receiver 324 confirms reception of the last data packet as well as the null packet.
- the reception of the null packet will allow the H-ARQ receiver 324 to detect the NACK-to-ACK error.
- the transmitter 310 and the receiver 320 may be a WTRU, a base station or any other network entity in a WCDMA, CDMA2000 or long term evolution (LTE) of a third generation (3G) system.
- WTRU includes but is not limited to a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, a cellular telephone, a personal data assistant (PDA), a computer, or any other type of user device capable of operating in a wireless environment.
- UE user equipment
- PDA personal data assistant
- Base station includes but is not limited to a Node-B, a site controller, an access point or any other type of interfacing device in a wireless environment.
- a method for implementing H-ARQ-assisted ARQ in a wireless communication system including a transmitter and a receiver, the transmitter including an H-ARQ transmitter and an ARQ transmitter, the receiver including an H-ARQ receiver and an ARQ receiver.
- the method of embodiment 1 comprising the step of an H-
- ARQ receiver determining whether an H-ARQ NACK-to-ACK error occurs. [0048] 3.
- the method of embodiment 2 comprising the step of the H-
- ARQ receiver sending an H-ARQ NACK-to-ACK error indicator to the H-ARQ transmitter when an H-ARQ NACK-to-ACK error occurs unless the number of retransmissions of a failed packet has reached a maximum retransmission limit, a maximum, time for delivery of the failed packet has expired or a lifespan of the failed packet has expired.
- H-ARQ NACK-to-ACK error indicator is associated with an H-ARQ process ID and the failed packet at the H-ARQ transmitter.
- H-ARQ NACK-to-ACK error indicator is sent via at least one of physical layer signaling, a MAC layer signaling and an RLC layer signaling.
- 9 The method as in any of the embodiments 3-8, wherein more than one packet is transmitted from the H-ARQ transmitter to the H- ARQ receiver simultaneously and the H-ARQ NACK-to-ACK error indicator indicates H-ARQ NACK-to-ACK errors of more than one packet.
- 10 10. The method as in any of the embodiments 3-9, wherein the
- H-ARQ NACK-to-ACK error indicator is sent along with a CRC.
- H-ARQ NACK-to-ACK error indicator is generated by one of the H-ARQ receiver and an ARQ receiver.
- ARQ receiver receives a new packet via the same H-ARQ process assigned for the failed packet instead of retransmission of the failed packet.
- ARQ receiver does not receive the failed packet until an error indication timer expires, the error indication timer being set when a NACK is sent to the H-
- H-ARQ receiver sends the H-ARQ NACK-to-ACK error indicator.
- H-ARQ receiver sending a local NACK to the ARQ receiver if the H-ARQ receiver does not receive the failed packet before the recovery timer expires.
- ARQ receiver receives a predetermined number of packets successfully.
- H-ARQ receiver sending a response to the small packet, whereby a recovery of the last packet is ensured by the small packet.
- ARQ-assisted ARQ [0087] 42.
- the system of embodiment 41 comprising a receiver including an H-ARQ receiver and an ARQ receiver, the H-ARQ receiver being configured to determine whether an H-ARQ 'NACK-to- ACK error occurs and send an H-ARQ NACK-to-ACK error indicator to an H-ARQ transmitter unless the number of retransmissions of a failed packet has reached a maximum retransmission limit, a maximum time for delivery of the failed packet has expired or a lifespan of the failed packet has expired.
- H-ARQ receiver successfully receives the ACK for the H-ARQ NACK-to-ACK error indicator.
- ARQ receiver receives a new packet via the same H-ARQ process assigned for the failed packet instead of retransmission of the failed packet.
- ARQ receiver does not receive the failed packet until an error indication timer expires, the error indication timer being set when a NACK is sent to the H-
- ARQ transmitter retransmits the failed packet until the failed packet is successfully delivered unless the maximum retransmission limit has reached, the maximum delivery time has expired or the lifespan of the failed packet has expired.
- H-ARQ NACK-to-ACK error indicator and sends a local NACK to the ARQ receiver if the H-ARQ receiver does not receive the failed packet before the recovery timer expires.
- a receiver for implementing H-ARQ-assisted ARQ [00124] 79.
- a receiver for implementing H-ARQ-assisted ARQ [00125] 80.
- the receiver of embodiment 79 comprising an ARQ receiver and an H-ARQ receiver.
- NACK-to-ACK error indicator is associated with an H-ARQ process ID and the failed packet at the H-ARQ transmitter.
- NACK-to-ACK error indicator includes the H-ARQ process ID and a transmission sequence number of the failed packet.
- [00130] 85 The receiver as in any of the embodiments 81-84, wherein transmission of the H-ARQ NACK-to-ACK error indicator and transmission of the failed packet are independent.
- ARQ receiver receives a new packet via the same H-ARQ process assigned for the failed packet instead of retransmission of the failed packet.
- ARQ receiver does not receive the failed packet until an error indication timer expires, the error indication timer being set when a NACK is sent to the H-
- H-ARQ NACK-to-ACK error indicator and sends a local NACK to the ARQ receiver if the H-ARQ receiver does not receive the failed packet before the recovery timer expires.
- the transmitter of embodiment 101 comprising an ARQ transmitter and an H-ARQ transmitter.
- ROM read only memory
- RAM random access memory
- register cache memory
- semiconductor memory devices magnetic media such as internal hard disks and removable disks, magneto-optical media, and optical media such as CD- ROM disks, and digital versatile disks (DVDs).
- Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and/or a state machine.
- DSP digital signal processor
- ASICs Application Specific Integrated Circuits
- FPGAs Field Programmable Gate Arrays
- a processor in association with software may be used to implement a radio frequency transceiver for use in a wireless transmit receive unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer.
- the WTRU may be used in conjunction with modules, implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands free headset, a keyboard, a Bluetooth® module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) display unit, an organic light-emitting diode (OLED) display unit, a digital music player, a media player, a video game player module, an Internet browser, and/or any wireless local area network (WLAN) module.
- modules implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker,
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002635762A CA2635762A1 (en) | 2005-12-29 | 2006-12-27 | Method and system for implementing h-arq-assisted arq operation |
AU2006332854A AU2006332854B2 (en) | 2005-12-29 | 2006-12-27 | Method and system for implementing H-ARQ-assisted ARQ operation |
JP2008548684A JP2009522873A (en) | 2005-12-29 | 2006-12-27 | Method and system for H-ARQ assisted ARQ operation |
EP06846062A EP1974492A2 (en) | 2005-12-29 | 2006-12-27 | Method and system for implementing h-arq-assisted arq operation |
BRPI0621173-9A BRPI0621173A2 (en) | 2005-12-29 | 2006-12-27 | METHOD AND SYSTEM AND IMPLEMENTATION OF ARCH OPERATION ASSISTED BY H-ARQ |
IL192504A IL192504A0 (en) | 2005-12-29 | 2008-06-29 | Method and system for implementing ii-arq-assisted arq operation |
Applications Claiming Priority (4)
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US75471305P | 2005-12-29 | 2005-12-29 | |
US60/754,713 | 2005-12-29 | ||
US87136806P | 2006-12-21 | 2006-12-21 | |
US60/871,368 | 2006-12-21 |
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WO2007079085A2 true WO2007079085A2 (en) | 2007-07-12 |
WO2007079085A3 WO2007079085A3 (en) | 2007-10-25 |
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EP (1) | EP1974492A2 (en) |
JP (1) | JP2009522873A (en) |
KR (2) | KR20080080234A (en) |
CN (1) | CN101814982A (en) |
AR (1) | AR058883A1 (en) |
AU (1) | AU2006332854B2 (en) |
BR (1) | BRPI0621173A2 (en) |
CA (1) | CA2635762A1 (en) |
IL (1) | IL192504A0 (en) |
RU (1) | RU2008131049A (en) |
SG (2) | SG154450A1 (en) |
TW (2) | TW200729815A (en) |
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
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CN101814982A (en) | 2010-08-25 |
CA2635762A1 (en) | 2007-07-12 |
JP2009522873A (en) | 2009-06-11 |
SG158087A1 (en) | 2010-01-29 |
KR20080083714A (en) | 2008-09-18 |
TW200729815A (en) | 2007-08-01 |
EP1974492A2 (en) | 2008-10-01 |
AU2006332854B2 (en) | 2011-12-08 |
TW201018130A (en) | 2010-05-01 |
WO2007079085A3 (en) | 2007-10-25 |
IL192504A0 (en) | 2009-02-11 |
KR20080080234A (en) | 2008-09-02 |
RU2008131049A (en) | 2010-02-10 |
SG154450A1 (en) | 2009-08-28 |
AR058883A1 (en) | 2008-02-27 |
AU2006332854A1 (en) | 2007-07-12 |
BRPI0621173A2 (en) | 2011-12-06 |
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