METHOD AND ARRANGEMENT IN A TELECOMMUNICATION SYSTEM
First Claim
1. A method in a user equipment, UE, in connection with a base station in a cellular communication system, for avoiding errors in a HARQ process, wherein an NDI flag is used both for indicating either semi-persistent scheduling, SPS, activation or SPS retransmissions, and for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode, comprising the steps ofreceiving, in a scheduling message, an indication that dynamically scheduled transmission will take place;
- if a semi persistent resource has occurred for the same HARQ process since a previously received indication for dynamically scheduled transmission, then considering the NDI flag to be toggled regardless of the value of the NDI flag.
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Accused Products
Abstract
The present invention relates to a method in a cellular communication system, for avoiding errors in a HARQ process, wherein an NDI flag is used both for indicating either semi-persistent scheduling, SPS activation or SPS retransmissions, and also for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode. The method comprises the steps of receiving, in a scheduling message, an indication that dynamically scheduled transmission will take place; if a semi persistent resource has occurred for the same HARQ process since a previously received indication for dynamically scheduled transmission, then considering the NDI flag to be toggled regardless of the value of the NDI flag. Thus, if the condition is fulfilled, a UE will always regard the NDI flag as indicating or requesting a new data transmission.
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Citations
18 Claims
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1. A method in a user equipment, UE, in connection with a base station in a cellular communication system, for avoiding errors in a HARQ process, wherein an NDI flag is used both for indicating either semi-persistent scheduling, SPS, activation or SPS retransmissions, and for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode, comprising the steps of
receiving, in a scheduling message, an indication that dynamically scheduled transmission will take place; if a semi persistent resource has occurred for the same HARQ process since a previously received indication for dynamically scheduled transmission, then considering the NDI flag to be toggled regardless of the value of the NDI flag. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A User Equipment, UE, (500) connectable to a base station in a cellular communication system, said UE being configured to avoid errors in a HARQ process, in which an NDI flag is used both for indicating either semi-persistent scheduling, SPS, activation or SPS retransmissions, and for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode, comprising:
a transceiver unit (510) configured to receive, in a scheduling message, an indication that dynamically scheduled transmission will take place; a processing unit (520) configured to check if a semi-persistent resource has occurred for the same HARQ process since a previously received indication for dynamically scheduled transmission and to consider the NDI flag to be toggled regardless of the value of the NDI flag if said condition is fulfilled. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method in a base station in connection with a UE in a 15 cellular communication system, for avoiding errors in a HARQ process, wherein an NDI flag is used both for indicating semi-persistent scheduling, SPS, activation and SPS retransmissions and for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode, comprising the steps of
indicating, in a scheduling message to the UE that dynamically scheduled transmission will take place; if a semi persistent resource has occurred for the same HARQ process since a previous indication to the UE for dynamically scheduled transmission, then setting the NDI flag to any value and adopting this value as status for the HARQ process in question. - View Dependent Claims (14, 15)
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16. A base station (600) connectable with a UE in a cellular communication system, configured to avoid errors in a HARQ process, the base station being configured to use, in a HARQ process in communication with a UE (500), an NDI flag both for indicating either semi-persistent scheduling, SPS, activation or SPS retransmissions, and for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode, said base station comprising
a scheduling unit (601) configured to schedule a dynamic transmission; -
a transceiver unit (610) configured to transmit in a scheduling message to said UE, an indication that dynamically scheduled transmission will take place; a processing unit (620) configured to check if a semi persistent resource has occurred for the same HARQ process since a previous indication to the UE for dynamically scheduled transmission and to set the NDI flag to any value and adopt this value as status for the HARQ process in question if said condition is fulfilled. - View Dependent Claims (17, 18)
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Specification