Packet duplication control
A wireless device receives parameters indicating that first bearer(s) of bearer(s) are configured with duplication. Each bearer in bearer(s) is identified by an identifier. A control element of a fixed size of one octet is received. The control element comprises a sequence of activation bits comprising a first activation bit for a first bearer in the first bearer(s). A first position of the first activation bit in the one octet identifies a second position of a first bearer identifier in an ordered list of the bearer identifiers. A first value of the first activation bit indicates whether the PDCP duplication for the first bearer is activated or deactivated. In response to the control element indicating that the PDCP duplication is activated for the first bearer, a first packet corresponding to the first bearer is transmitted via a first cell and a duplicate of the first packet via a second cell.
1. A method comprising:
receiving, by a wireless device, one or more messages comprising configuration parameters indicating a plurality of data bearers comprising one or more first data bearers configured with packet data convergence protocol (PDCP) duplication and one or more second data bearers that are not configured with PDCP duplication, wherein each data bearer in the plurality of data bearers is identified by a data bearer identifier;
receiving a control element of a fixed size of one octet, wherein:
the control element comprises a sequence of activation bits comprising a first activation bit for a first data bearer in the one or more first data bearers, wherein a first position of the first activation bit in the one octet identifies a second position of a first data bearer identifier in an ordered list of data bearer identifiers of the one or more first data bearers configured with the PDCP duplication, wherein the ordered list of data bearer identifiers excludes the one or more second data bears that are not configured with PDCP duplication; and
a first value of the first activation bit indicates whether the PDCP duplication for the first data bearer is activated or deactivated; and
transmitting, in response to the control element indicating that the PDCP duplication is activated for the first data bearer, a first packet corresponding to the first data bearer via a first cell and a duplicate of the first packet via a second cell different from the first cell.
2. The method of claim 1 , wherein:
a first buffer associated with a first logical channel comprises the first packet; and
a second buffer associated with a second logical channel comprises the duplicate of the first packet.
3. The method of claim 2 , wherein the one or messages indicates that:
the first cell is a first allowed serving cell for transmission of data from the first logical channel; and
the second cell is a second allowed serving cell for transmission of data from the second logical channel.
4. The method of claim 2 , wherein the one or messages indicates that:
a first plurality of cells are first allowed serving cells for transmission of data from the first logical channel, the first plurality of cells comprising the first cell; and
a second plurality of cells are second allowed serving cells for transmission of data from the second logical channel, the second plurality of cells comprising the second cell.
5. The method of claim 1 , wherein:
the first packet corresponds to a first radio link control (RLC) entity and a first logical channel; and
the duplicate of the first packet corresponds to a second RLC entity and a second logical channel.
6. The method of claim 1 , further comprising:
receiving a first uplink grant for transmission of the first packet via the first cell; and
receiving a second uplink grant for transmission of the duplicate of the first packet via the second cell.
7. The method of claim 1 , wherein the ordered list is an ascending ordered list.
8. The method of claim 1 , wherein the ordered list is a descending ordered list.
9. The method of claim 1 , wherein the first position is same as the second position.
10. The method of claim 1 , wherein the control element indicates:
activation of the PDCP duplication for the first data bearer in response to the first value being one; and
deactivation of the PDCP duplication for the first data bearer in response to the first value being zero.
11. The method of claim 1 , wherein a data bearer in the plurality of data bearers is a data radio bearer.
12. The method of claim 1 , wherein the control element is associated with a logical channel identifier indicating that the control element is for PDCP duplication activation/deactivation of one or more data bearers.
13. The method of claim 1 , further comprising:
receiving a second control element indicating that the PDCP duplication is deactivated for the first data bearer;
receiving an uplink grant for the second cell; and
transmitting a packet associated with the first data bearer based on the uplink grant.
14. The method of claim 3 , wherein:
the first packet corresponds to a first radio link control (RLC) entity and the first logical channel; and
the duplicate of the first packet corresponds to a second RLC entity and the second logical channel.
15. The method of claim 13 , further comprising:
receiving a first uplink grant for transmission of the first packet via the first cell; and
receiving a second uplink grant for transmission of the duplicate of the first packet via the second cell.
16. The method of claim 14 , wherein the first position is same as the second position.
17. The method of claim 15 , wherein the ordered list is an ascending ordered list.
18. The method of claim 15 , wherein the ordered list is a descending ordered list.
19. The method of claim 4 , wherein:
the first packet corresponds to a first radio link control (RLC) entity and the first logical channel; and
the duplicate of the first packet corresponds to a second RLC entity and the second logical channel.
20. The method of claim 19 , further comprising:
receiving a first uplink grant for transmission of the first packet via the first cell; and
receiving a second uplink grant for transmission of the duplicate of the first packet via the second cell.