Abstract
The invention relates to a method in a first communication device of receiving control information over a radio channel from a second communication device. The first communication device receives a subframe over the radio channel and determines whether the subframe is a downlink subframe with downlink assignment intended for the first communication device by reading data in the subframe. That being the case the first communication device decodes data within the subframe and determines whether any data packet being sent from the second communication device before the subframe has been missed by analyzing an indicator associated to the subframe in the data. The indicator provides knowledge about previous downlink subframes with downlink assignment intended for the first communication device.
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| 5G | 18/05/2017 | ISLD-201704-020 | ERICSSON INC |
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Specification Information
Specification Information
Technologies
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Technologies
Resource configuration Scheduling
Product
User Equipment (UE/Terminal)Base Station (eNB/gNB)
Use Cases
Wireless communication
Services
Transmitting/receiving data in downlink
Claim
1. A method in a first communication device for receiving control information and data over a radio channel from a second communication device the method comprising the steps of:
receiving at least part of a subframe over the radio channel;
detecting that the subframe is a subframe having at least one downlink assignment intended for the first communication device;
receiving an indicator over the radio channel, the indicator being associated with the subframe and including information about at least one previously transmitted subframe having another at least one downlink assignment intended for the first communication device; and
analyzing the indicator associated with the subframe for determining whether the another at least one downlink assignment intended for the first communication device has been missed.', 'receiving at least part of a subframe over the radio channel;', 'detecting that the subframe is a subframe having at least one downlink assignment intended for the first communication device;', 'receiving an indicator over the radio channel, the indicator being associated with the subframe and including information about at least one previously transmitted subframe having another at least one downlink assignment intended for the first communication device; and', 'analyzing the indicator associated with the subframe for determining whether the another at least one downlink assignment intended for the first communication device has been missed.
2. The method according to claim 1, the receiving step further comprising receiving a plurality of subframes and the detecting step comprising detecting a plurality of subframes with downlink assignments intended for the first communication device, further comprising the steps of:
generating ACK/NAK feedback of reception in response to the received plurality of detected subframes, wherein the ACK/NAK feedback is bundled into a single bundled ACK/NAK feedback message, and
transmitting the single bundled ACK/NAK feedback message in an uplink resource associated with a last received detected subframe with downlink assignment intended for the first communication device of an uplink subframe associated to the plurality of downlink subframes.', 'generating ACK/NAK feedback of reception in response to the received plurality of detected subframes, wherein the ACK/NAK feedback is bundled into a single bundled ACK/NAK feedback message, and', 'transmitting the single bundled ACK/NAK feedback message in an uplink resource associated with a last received detected subframe with downlink assignment intended for the first communication device of an uplink subframe associated to the plurality of downlink subframes.
3. The method according to claim 2, is performed in case no downlink assignment is determined to have been missed, and in case at least if one downlink assignment is determined to have been missed, no feedback is transmitted.
4. The method according to claim 2, wherein the single bundled ACK/NAK feedback message comprises a negative acknowledgement, (NAK,) when decoding of data in one received subframe with a detected downlink assignment fails or a downlink assignment has been determined to have been missed.
5. The method according to claim 2, wherein the single, bundled ACK/NAK feedback message comprises a positive acknowledgement (ACK), when the decoding of data in all received subframes with detected downlink assignments is successful and it is determined that the first communication device has not missed any downlink assignments.
6. The method according to claim 1, wherein the indicator indicates which number of the plurality of subframes with a downlink assignment intended for the first communication device the subframe is, including an ordinal number and an accumulative number.
7. The method according to claim 1, wherein the indicator indicates a number of previous subframes with downlink assignment intended for the first communication device and comprises one bit indicating a numeral reference.
8. The method according to claim 1, wherein the indicator is part of the downlink assignment on a control channel.
9. The method according to claim 1 the indicator indicating a number of previous subframes with assignment intended for the first communication device and comprises a cyclic redundancy check value generated from a scramble/mask of a Cyclic Redundancy Check (CRC) generated with a polynomial for the assigned subframe on a Physical Downlink Channel (PDCH) including Physical Downlink Shared Channel (PDSCH) and Physical Downlink Control Channel (PDCCH), wherein the scramble/mask depends on the number of previous subframes with downlink assignment intended for the first communication device and the first communication device retrieving the indicator from decoding the data or control information
10. The method according to claim 1, wherein the determining of whether the one downlink assignment has been missed comprises to compare the indicator with an expected value of the indicator
11. The method according to claim 1 wherein the step of determining whether the one downlink assignment has been missed is done for a last subframe or after each subframe in a bundling window of a plurality of subframes with downlink assignments intended to the first communication
12. The method according to claim 1, wherein the first communication device stops decoding or receiving more subframes within a bundling window if it is detected that is has missed a subframe with a downlink assignment intended for the first communication device
13. A method in a second communication device for transmitting control information and data over a radio channel to a first communication device in a subframe with a downlink assignment intended for the first communication device, the method comprising the steps of:
assigning a plurality of downlink subframes to the first communication device, the plurality of downlink subframes including the subframe with the downlink assignment and a set of subframes previous to the subframe with the downlink assignment;
associating an indicator with the subframe with the downlink assignment, the indicator indicating a number of subframes in the set of previous subframes up to the subframe with the downlink assignment that are also subframes with a downlink assignment intended for the first communication device, thereby indicating to the first communication device whether a downlink assignment in the set of previous subframes was missed, and
transmitting the control information and data with the subframe to the first communication device.', 'assigning a plurality of downlink subframes to the first communication device, the plurality of downlink subframes including the subframe with the downlink assignment and a set of subframes previous to the subframe with the downlink assignment;', 'associating an indicator with the subframe with the downlink assignment, the indicator indicating a number of subframes in the set of previous subframes up to the subframe with the downlink assignment that are also subframes with a downlink assignment intended for the first communication device, thereby indicating to the first communication device whether a downlink assignment in the set of previous subframes was missed, and', 'transmitting the control information and data with the subframe to the first communication device
14. The method according to claim 13, wherein feedback of the reception of the plurality of downlink subframes is arranged to be bundled into a single ACK/NAK feedback message at the first communication device the method further comprising the step of
determining whether the control information or data has been received by checking an uplink resource of an uplink subframe assigned to the plurality of assigned downlink subframes for the single ACK/NAK feedback message feedback of reception, wherein the first uplink resource is related to a last assigned downlink subframe of the plurality of assigned downlink subframes.', 'determining whether the control information or data has been received by checking an uplink resource of an uplink subframe assigned to the plurality of assigned downlink subframes for the single ACK/NAK feedback message feedback of reception, wherein the first uplink resource is related to a last assigned downlink subframe of the plurality of assigned downlink subframes.15. The method according to claim 14, wherein an uplink resource of the last assigned downlink subframe comprises no feedback of reception, checking a second uplink resource related to an assigned downlink subframe before the last assigned downlink subframe for the single ACK/NAK feedback message.16. The method according to claim 14, wherein if no single ACK/NAK feedback message is detected on the uplink resource, it is determined that one downlink assignment has been missed.17. The method according to claim 14, wherein ACK in the single ACK/NAK feedback message indicates properly received control information and NAK indicates a failed decoded subframe or a missed downlink assignment.18. The method according to claim 14, wherein it is determined that one downlink assignment has been missed if no single ACK/NAK feedback message is detected on the uplink resource.19. The method according to claim 18, further comprising determining to resend assigned a downlink subframe based on a result of the checking of the uplink subframe resource.
20. The method according to claim 14, wherein the number indicated by the indicator includes at least one of an ordinal and an accumulative number.
21. The method according to claim 13, wherein the indicator indicates a number of previous subframes with downlink assignment intended for the first communication device by comprising one bit indicating a numeral reference.
22. The method according to claim 13, wherein the indicator is arranged as a part of the at least one downlink assignment on the control channel.
23. The method according to claim 13, wherein the indicator of previous subframes with assignment intended for the first communication device comprises a cyclic redundancy check value generated from a scramble/mask of a Cyclic Redundancy Check (CRC) generated with a polynomial for the assigned subframe on a Physical Downlink Channel (PDCH) including Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), wherein the scramble/mask depends on the number of previously scheduled assigned subframes.
24. A first communication device for receiving control information and data over a radio channel from a second communication device the first communication device comprising:
a receiving interface adapted to receive a subframe of a radio frame, and
a control unit arranged to determine whether the subframe is a subframe with at least one downlink assignment intended for the first communication device, the control unit being further arranged to
determine whether any downlink assignment for data, that has been scheduled in and sent from the second communication device prior to the subframe, has been missed by analysing an indicator associated with the subframe, the indicator being arranged to provide information of a previous subframe with downlink assignments intended for the first communication device.', 'a receiving interface adapted to receive a subframe of a radio frame, and', 'a control unit arranged to determine whether the subframe is a subframe with at least one downlink assignment intended for the first communication device, the control unit being further arranged to
determine whether any downlink assignment for data, that has been scheduled in and sent from the second communication device prior to the subframe, has been missed by analysing an indicator associated with the subframe, the indicator being arranged to provide information of a previous subframe with downlink assignments intended for the first communication device.', 'determine whether any downlink assignment for data, that has been scheduled in and sent from the second communication device prior to the subframe, has been missed by analysing an indicator associated with the subframe, the indicator being arranged to provide information of a previous subframe with downlink assignments intended for the first communication device.
25. A second communication device for transmitting control information and data with a subframe comprising a downlink assignment intended for a first communication device of a radio frame over a radio channel to the first communication device, the second communication device comprising:
a control unit arranged to add an indicator to the subframe to provide information of previous subframes with at least one downlink assignment intended for the first communication device in the control information to the first communication device, wherein the indicator indicates the at least one downlink assignment of the previous subframes was missed, and
a transmitting interface for transmitting the control information and data with the subframe to the first communication device.', 'a control unit arranged to add an indicator to the subframe to provide information of previous subframes with at least one downlink assignment intended for the first communication device in the control information to the first communication device, wherein the indicator indicates the at least one downlink assignment of the previous subframes was missed, and', 'a transmitting interface for transmitting the control information and data with the subframe to the first communication device.']
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SUMMARY
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.