Method for transmitting or receiving a MAC PDU in a wireless communication system and a device therefor
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting or receiving a MAC PDU in a wireless communication system, the method comprising: setting a LCID field in a MAC subheader to a first value indicating that an eLCID field is included in the MAC subheader when a MAC PDU including the LCID field and the eLCID field is to be generated, setting the eLCID field to a second value identifying a logical channel of a MAC SDU or a type of a MAC CE, and generating and transmitting the MAC PDU including the LCID field and the eLCID field, and the MAC SDU or the MAC CE.
1. A method for a device operating in a wireless communication system, the method comprising:
generating a MAC protocol data unit (PDU) including a MAC PDU subheader, the MAC PDU subheader including a first octet of 8 bits followed by a second octet of 8 bits,
wherein the first octet includes a logical channel identity (LCID) field consisting of 5 bits; and
transmitting the generated MAC PDU to a second device in the wireless communication system,
wherein, based on the 5 bits of the LCID field being set to a specific value, the LCID field indicates that the second octet includes an extended LCID (eLCID) field comprising more than 5 bits that identify either a corresponding logical channel of a MAC service data unit (SDU) or a corresponding type of a MAC control element (CE),
otherwise, the eLCID is not included in the MAC PDU subheader and the 5 bits of the LCID field identify either a corresponding logical channel of a MAC SDU or a corresponding type of a MAC CE, and
wherein the generated MAC PDU further includes either a MAC SDU or a MAC CE corresponding to a respective one of the LCID or eLCID.
2. The method of claim 1 ,
wherein the MAC PDU subheader further includes a length field indicating a length of the MAC SDU or the MAC CE, and
wherein the eLCID field is followed by the length field in the MAC PDU subheader.
3. The method of claim 1 , wherein the device is a base station (BS) and the second device is a user equipment (UE).
4. The method of claim 1 , wherein the device is a user equipment (UE) and the second device is a base station (BS).
5. The method of claim 1 , wherein the device is configured by the second device to generate the MAC PDU.
6. A device operating in a wireless communication system, the device comprising:
a memory;
a transceiver; and
a processor operatively connected to the memory and the transceiver, the processor configured for:
generating a MAC protocol data unit (PDU) including a MAC PDU subheader, the MAC PDU subheader including a first octet of 8 bits followed by a second octet of 8 bits,
wherein the first octet includes a logical channel identity (LCID) field consisting of 5 bits; and
transmitting the generated MAC PDU to a second device in the wireless communication system,
wherein, based on the 5 bits of the LCID field being set to a specific value, the LCID field indicates that the second octet includes an extended LCID (eLCID) field comprising more than 5 bits that identify either a corresponding logical channel of a MAC service data unit (SDU) or a corresponding type of a MAC control element (CE),
otherwise, the eLCID is not included in the MAC PDU subheader and the 5 bits of the LCID field identify either a corresponding logical channel of a MAC SDU or a corresponding type of a MAC CE, and
wherein the generated MAC PDU further includes either a MAC SDU or a MAC CE corresponding to a respective one of the LCID or eLCID.
7. The device of claim 6 ,
wherein the MAC PDU subheader further includes a length field indicating a length of the MAC SDU or the MAC CE, and
wherein the eLCID field is followed by the length field in the MAC subheader.
8. The device of claim 6 , wherein the device is a base station (BS) and the second device is a user equipment (UE).
9. The device of claim 6 , wherein the device is a user equipment (UE) and the second device is a base station (BS).
10. The device of claim 6 , wherein the device is configured by the second device to generate the MAC PDU.
11. A method for a device operating in a wireless communication system, the method comprising:
receiving, from a second device in the wireless communication system, a MAC protocol data unit (PDU) including a MAC PDU subheader, the MAC PDU subheader including a first octet of 8 bits followed by a second octet of 8 bits,
wherein the first octet includes a logical channel identity (LCID) field consisting of 5 bits; and
decoding the MAC PDU,
wherein, based on the 5 bits of the LCID field being set to a specific value, the LCID field indicates that the second octet includes an extended LCID (eLCID) field comprising more than 5 bits that identify either a corresponding logical channel of a MAC service data unit (SDU) or a corresponding type of a MAC control element (CE),
otherwise, the eLCID is not included in the MAC PDU subheader and the 5 bits of the LCID field identify either a corresponding logical channel of a MAC SDU or a corresponding type of a MAC CE, and
wherein the MAC PDU further includes either a MAC SDU or a MAC CE corresponding to a respective one of the LCID or eLCID.
12. The method of claim 11 ,
wherein the MAC PDU subheader further includes a length field indicating a length of the MAC SDU or the MAC CE, and
wherein the eLCID field is followed by the length field in the MAC subheader.
13. The method of claim 11 , wherein the device is a base station (BS) and the second device is a user equipment (UE).
14. The method of claim 11 , wherein the device is a user equipment (UE) and the second device is a base station (BS).
15. A device operating in a wireless communication system, the device comprising:
a memory;
a transceiver; and
a processor operatively connected to the memory and the transceiver, the processor configured for:
receiving, from a second device in the wireless communication system, a MAC protocol data unit (PDU) including a MAC PDU subheader, the MAC PDU subheader including a first octet of 8 bits followed by a second octet of 8 bits,
wherein the first octet includes a logical channel identity (LCID) field consisting of 5 bits; and
decoding the MAC PDU,
wherein, based on the 5 bits of the LCID field being set to a specific value, the LCID field indicates that the second octet includes an extended LCID (eLCID) field comprising more than 5 bits that identify either a corresponding logical channel of a MAC service data unit (SDU) or a corresponding type of a MAC control element (CE),
otherwise, the eLCID is not included in the MAC PDU subheader and the 5 bits of the LCID field identify either a corresponding logical channel of a MAC SDU or a corresponding type of a MAC CE, and
wherein the generated MAC PDU further includes either a MAC SDU or a MAC CE corresponding to a respective one of the LCID or eLCID.
16. The device of claim 15 ,
wherein the MAC PDU subheader further includes a length field indicating a length of the MAC SDU or the MAC CE, and
wherein the eLCID field is followed by the length field in the MAC subheader.
17. The device of claim 15 , wherein the device is a base station (BS) and the second device is a user equipment (UE).
18. The device of claim 15 , wherein the device is a user equipment (UE) and the second device is a base station (BS).
19. The device of claim 15 , wherein the device is configured by the second device to generate the MAC PDU.