IMPROVED PROTOCOL SYNCHRONIZATION FOR HARQ

Abstract

A method and apparatus according to the present invention addresses and/or prevents lost protocol synchronization in HARQ systems caused by ACK/NACK errors. One embodiment detects lost synchronization errors for NDI-based retransmission protocols and restores synchronization by sending an explicit RESET message. In response to the RESET message the transmitter aborts the transmission of a current PDU and transmits a new PDU and corresponding NDI. Another embodiment prevents protocol synchronization errors by sending scheduling grants on a packet by packet basis. The receiver sends a subsequent explicit scheduling grant to the transmitter based on an error evaluation of a received PDU. The transmitter will not send the next PDU unless it receives the subsequent explicit scheduling grant.

A method and apparatus according to the present invention addresses and/or prevents lost protocol synchronization in HARQ systems caused by ACK/NACK errors. One embodiment detects lost synchronization errors for NDI-based retransmission protocols and restores synchronization by sending an explicit RESET message. In response to the RESET message the transmitter aborts the transmission of a current PDU and transmits a new PDU and corresponding NDI. Another embodiment prevents protocol synchronization errors by sending scheduling grants on a packet by packet basis. The receiver sends a subsequent explicit scheduling grant to the transmitter based on an error evaluation of a received PDU. The transmitter will not send the next PDU unless it receives the subsequent explicit scheduling grant.

Technology	Declaration Information	Specification Information	Explicitly Disclosed	Patent Type
4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: v10.3.0 Illustrative part: 5 Release No: 10 + -	No	Family Member
5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: v15.0.0 Illustrative part: ---- Release No: 15 + -	No	Family Member

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Publication No	Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information	Explicitly Disclosed	Patent Type
US2010077272A1	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	Yes	Basis Patent
US2010077272A1	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	Yes	Basis Patent
US8489951B2	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	Yes	Basis Patent
US8489951B2	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	Yes	Basis Patent
EP2074734A2	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2074734A2	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2074734A4	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2074734A4	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
WO2008044993A2	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
WO2008044993A2	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
WO2008044993A3	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
WO2008044993A3	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2782285A1	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2782285A1	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2782285B1	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
EP2782285B1	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
US2013266001A1	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
US2013266001A1	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
US9485059B2	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 v10.3.0 Version No: Section No: -- Release No: + -	No	Family Member
US9485059B2	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
EP3104544A1	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 Version No: -- Section No: -- Release No: -- + -	No	Family Member
EP3104544A1	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
US2017005783A1	4G	19/03/2012	ISLD-201203-008	ERICSSON INC	S1 TS Number: TS 136 321 Version No: -- Section No: -- Release No: -- + -	No	Family Member
US2017005783A1	5G	19/05/2017	ISLD-201704-008	ERICSSON INC	S1 TS Number: TS 138 321 v15.0.0 Version No: Section No: -- Release No: + -	No	Family Member
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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
-----	-----	-----	-----	-----	S1 TS Number: ----- Version No: ----- Section No:----- Release No:----- + -				-----	-----	-----	-----

EP2074734B1

5G,4G

Title

IMPROVED PROTOCOL SYNCHRONIZATION FOR HARQ

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Patent number:EP2074734B1

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Technology: 5G

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