Hybrid automatic repeat requests in a wireless device and wireless network
A wireless device receives a grant for one or more subframes. The grant comprises a hybrid automatic repeat request process number (HARQ ID). The wireless device transmits a transport block in a subframe of the one or more subframes employing a first HARQ ID being calculated based on the HARQ ID and a position of the subframe in the one or more subframes.
1. A method comprising:
receiving, by a wireless device, a downlink control information (DCI) indicating uplink resources for a plurality of consecutive uplink subframes of a licensed assisted access (LAA) cell, the DCI comprising:
a first field indicating a first number of the plurality of consecutive uplink subframes; and
a second field indicating a hybrid automatic repeat request process number (HARQ ID);
performing at least one listen-before-talk procedure for transmitting via the plurality of consecutive uplink subframes; and
transmitting one or more transport blocks on a first subframe of the plurality of consecutive uplink subframes according to the DCI and a first HARQ ID;
wherein:
the first HARQ ID is equal to ((the HARQ ID plus i) modulo a first pre-configured number) for the first subframe, and i indicates a subframe position of the first subframe in the plurality of consecutive uplink subframes; and
i is equal to zero for a starting subframe, and i is equal to the first number minus one for an ending subframe of the plurality of consecutive uplink subframes, regardless of an outcome of the at least one listen-before-talk procedure for any subframe of the plurality of consecutive uplink subframes before the first subframe.
2. The method of claim 1 , wherein the DCI further comprises at least one of:
an assignment of a plurality of resource blocks; or
a transmit power control command.
3. The method of claim 1 , wherein the DCI further comprises at least one of:
a modulation and coding scheme;
a redundancy version (RV); or
a new data indicator (NDI).
4. The method of claim 1 , wherein the first pre-configured number depends on a number of HARQ processes supported by the wireless device.
5. The method of claim 1 , wherein the first number of the plurality of consecutive uplink subframes is less than the first pre-configured number.
6. The method of claim 1 , wherein the first HARQ ID is associated with an asynchronous HARQ.
7. The method of claim 1 , wherein the DCI is associated with a number of HARQ processes, the number of HARQ processes equal to the first number of the plurality of consecutive uplink subframes.
8. The method of claim 1 , further comprising receiving one or more radio resource control (RRC) messages comprising configuration parameters for the LAA cell, wherein the one or more RRC messages further comprise plurality of consecutive uplink subframe allocation configuration parameters comprising a third field, the third field indicating an upper limit for the first number of the plurality of consecutive uplink subframes.
9. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive a downlink control information (DCI) indicating uplink resources for a plurality of consecutive uplink subframes of a licensed assisted access (LAA) cell, the DCI comprising:
a first field indicating a first number of the plurality of consecutive uplink subframes; and
a second field indicating a hybrid automatic repeat request process number (HARQ ID);
perform at least one listen-before-talk procedure for transmitting via the plurality of consecutive uplink subframes; and
transmit one or more transport blocks on a first subframe of the plurality of consecutive uplink subframes according to the DCI and a first HARQ ID;
wherein:
the first HARQ ID is equal to ((the HARQ ID plus i) modulo a first pre-configured number) for the first subframe, and i indicates a subframe position of the first subframe in the plurality of consecutive uplink subframes; and
i is equal to zero for a starting subframe, and i is equal to the first number minus one for an ending subframe of the plurality of consecutive uplink subframes, regardless of an outcome of the at least one listen-before-talk procedure for any subframe of the plurality of consecutive uplink subframes before the first subframe.
10. The wireless device of claim 9 , wherein the DCI further comprises at least one of:
an assignment of a plurality of resource blocks; or
a transmit power control command.
11. The wireless device of claim 9 , wherein the DCI further comprises at least one of:
a modulation and coding scheme;
a redundancy version (RV); or
a new data indicator (NDI).
12. The wireless device of claim 9 , wherein the first pre-configured number depends on a number HARQ processes supported by the wireless device.
13. A method comprising:
transmitting a downlink control information (DCI) indicating uplink resources for a plurality of consecutive uplink subframes of a licensed assisted access (LAA) cell, the DCI comprising:
a first field indicating a first number of the plurality of consecutive uplink subframes; and
a second field indicating a hybrid automatic repeat request process number (HARQ ID);
receiving one or more transport blocks on a first subframe of the plurality of consecutive uplink subframes according to the DCI and a first HARQ ID;
wherein:
the first HARQ ID is equal to ((the HARQ ID plus i) modulo a first pre-configured number) for the first subframe, and i indicates a subframe position of the first subframe in the plurality of consecutive uplink subframes; and
i is equal to zero for a starting subframe, and i is equal to the first number minus one for an ending subframe of the plurality of consecutive uplink subframes, regardless of an outcome of the at least one listen-before-talk procedure for any subframe of the plurality of consecutive uplink subframes before the first subframe.