Logical channel mapping to grant free transmission
A wireless device receives RRC message(s) comprising: parameter(s) indicating whether a configured periodic grant of a first type can be used for transmission of data of a first logical channel; a timing offset and a symbol number identifying a resource of an uplink grant of the configured periodic grant of the type; and a first periodicity of the configured periodic grant. The first periodicity indicates a time interval between two subsequent resources of the configured periodic grant. The configured periodic grant is activated in response to receiving the RRC message(s). The data of the logical channel is multiplexed onto transport block(s) for transmission via the resource in response to the parameter(s) indicating that the configured periodic grant can be used by the logical channel. The transport block(s) are transmitted via the resource of the configured periodic grant.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a first radio resource control (RRC) message comprising:
a parameter indicating that data of a first logical channel, of a plurality of logical channels, is allowed to be transmitted using a configured periodic grant of a first type,
an identifier (ID) of a logical channel group to which the first logical channel belongs,
a timing offset associated with a system frame number and information on a start symbol for identifying a resource to be allocated by the configured periodic grant of the first type, and
a first periodicity of the configured periodic grant of the first type;
activating the configured periodic grant of the first type based on the received first RRC message;
multiplexing the data of the first logical channel onto one or more transport blocks; and
transmitting, to the base station, the one or more transport blocks based on the activated configured periodic grant of the first type.
2. The method of claim 1 ,
wherein the configured periodic grant of the first type is used for resource allocation starting from a first symbol allocated based on the timing offset and the information on the start symbol, and
wherein the resource allocation reoccurs with the first periodicity.
3. The method of claim 1 , further comprising: determining, based on a first size of the data, to transmit the one or more transport blocks based on the resource of the configured periodic grant of the first type.
4. The method of claim 3 , wherein the transmitting comprises:
transmitting, to the base station, the one or more transport blocks in case that the first size is larger than a first value, wherein a second size of the resource of the configured periodic grant of the first type is related to the first value.
5. The method of claim 1 , further comprising:
identifying one or more symbols of the resource of the configured periodic grant of the first type based on the timing offset, the information on the start symbol, and the first periodicity.
6. The method of claim 1 , further comprising:
receiving, from the base station, a second RRC message comprising a second periodicity of a configured periodic grant of a second type, the configured periodic grant of the second type being provided by a physical downlink control channel (PDCCH);
receiving, from the base station, downlink control information (DCI) for a UL grant;
activating, based on the received DCI, the configured periodic grant of the second type which is used for another resource allocation starting from a second symbol allocated based on the DCI, wherein the other resource allocation reoccurring with the second periodicity; and
transmitting, to the base station, one or more second transport blocks based on the activated configured periodic grant of the second type.
7. The method of claim 6 , further comprising:
identifying one or more symbols of a resource of the configured grant of the second type based on the DCI and the second periodicity.
8. The method of claim 6 , wherein the first RRC message and the second RRC message are received by using the same message format.
9. The method of claim 1 , further comprising:
receiving, from the base station, a third RRC message indicating a release of the configured periodic grant of the first type; and
releasing the configured periodic grant of the first type based on the received third RRC message.
10. The method of claim 1 , wherein a value of the system frame number is 0.
11. A terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, a first radio resource control (RRC) message comprising:
a parameter indicating that data of a first logical channel, of a plurality of logical channels, is allowed to be transmitted using a configured periodic grant of a first type,
an identifier (ID) of a logical channel group to which the first logical channel belongs,
a timing offset associated with a system frame number and information on a start symbol for identifying a resource to be allocated by the configured periodic grant of the first type, and
a first periodicity of the configured periodic grant of the first type;
activate the configured periodic grant of the first type based on the received first RRC message;
multiplex the data of the first logical channel onto one or more transport blocks; and
transmit, to the base station via the transceiver, the one or more transport blocks based on the activated configured periodic grant of the first type.
12. The terminal of claim 11 ,
wherein the configured periodic grant of the first type is used for resource allocation starting from a first symbol allocated based on the timing offset, and the information on the start symbol, and
wherein the resource allocation reoccurs with the first periodicity.
13. The terminal of claim 11 , wherein the controller is further configured to transmit, to the base station via the transceiver, the one or more transport blocks based on a first size of the data and the resource of the configured periodic grant of the first type.
14. The terminal of claim 11 , wherein the controller is further configured to transmit, to the base station via the transceiver, the one or more transport blocks in case that a first size of the data is larger than a first value, and wherein a second size of the resource of the configured periodic grant of the first type is related to the first value.
15. The terminal of claim 11 , wherein the controller is further configured to identify one or more symbols of the resource of the configured periodic grant of the first type based on the timing offset, the information on the start symbol, and the first periodicity.
16. The terminal of claim 11 , wherein the controller is further configured to:
receive, from the base station via the transceiver, a second RRC message comprising a second periodicity of a configured periodic grant of a second type, the configured periodic grant of the second type being provided by a physical downlink control channel (PDCCH);
receive, from the base station via the transceiver, downlink control information (DCI) for a UL grant;
activate, based on the received DCI, the configured periodic grant of the second type which is used for another resource allocation starting from a second symbol allocated based on the DCI, wherein the other resource allocation reoccurring with the second periodicity; and
transmit, to the base station via the transceiver, one or more second transport blocks based on the activated configured periodic grant of the second type.
17. The terminal of claim 16 , wherein the controller is further configured to identify one or more symbols of a resource of the configured grant of the second type based on the DCI and the second periodicity.
18. The terminal of claim 16 , wherein the first RRC message and the second RRC message are received by using the same message format.
19. The terminal of claim 11 , wherein the controller is further configured to:
receive, from the base station via the transceiver, a third RRC message indicating a release of the configured periodic grant of the first type; and
release the configured periodic grant of the first type based on the received third RRC message.
20. The terminal of claim 11 , wherein a value of the system frame number is 0.
21. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a first radio resource control (RRC) message comprising:
a parameter indicating that data of a first logical channel, of a plurality of logical channels, is allowed to be transmitted using a configured periodic grant of a first type,
an identifier (ID) of a logical channel group to which the first logical channel belongs,
a timing offset associated with a system frame number and information on a start symbol for identifying a resource to be allocated by the configured periodic grant of the first type, and
a first periodicity of the configured periodic grant of the first type;
activating the configured periodic grant of the first type based on the transmitted first RRC message;
receiving, from the terminal, one or more transport blocks based on the resource of the configured periodic grant of the first type; and
demultiplexing the one or more transport blocks into the data of the first logical channel.
22. The method of claim 21 ,
wherein the configured periodic grant of the first type is used for resource allocation starting from a first symbol allocated based on the timing offset and the information on the start symbol, and
wherein the resource allocation reoccurs with the first periodicity.
23. The method of claim 21 , wherein a value of the system frame number is 0.