METHOD FOR CONCATENATED TRANSMISSION FOR ULTRA-RELIABLE LOW-LATENCY COMMUNICATION
An apparatus configured to be employed within a multiple transmission and reception point (multi-TRP) interacting with user equipments (UE) for ultra-reliable low-latency communication in a wireless communication system, including one or more processors with at least a memory configured to generate a Media Access Control (MAC) protocol data payload including a sequence of a set of IP packets (PacketN) for a set of user equipments (UEs), wherein one member of the sequence of a set of IP packets (PacketN) of a set of user equipments (UEs) are a sequence of multiple Media Access Control sub protocol data units (MAC subPDUs) for concatenated user equipment (UE) packets, attach a MAC header to the MAC data field to generate a packet data unit (PDU), wherein the MAC header indicates, if the Media Access Control (MAC) protocol data payload field is a concatenated payload field.
1 . An apparatus configured to be employed within a multiple transmission and reception point (multi-TRP) interacting with user equipments (UE) for ultra-reliable low-latency communication in a wireless communication system, comprising one or more processors with at least a memory configured to:
generate a Media Access Control (MAC) protocol data payload comprising a sequence of a set of IP packets (PacketN) for a set of user equipments (UEs), wherein one member of the sequence of a set of IP packets (PacketN) of a set of user equipments (UEs) are a sequence of multiple Media Access Control sub protocol data units (MAC subPDUs) for concatenated user equipment (UE) packets,
attach a MAC header to the MAC data field to generate a packet data unit (PDU), wherein the MAC header indicates, if the Media Access Control (MAC) protocol data payload field is a concatenated payload field.
2 . The apparatus according to claim 1 , wherein the MAC header indicates the number of the concatenated packets for multiple Media Access Control sub protocol data units (MAC subPDUs).
3 . The apparatus according to claim 1 , wherein the MAC header indicates a length field size of concatenated payload field.
4 . The apparatus according to claim 1 , wherein the MAC header indicates length of corresponding concatenated multiple Media Access Control sub protocol data units (MAC subPDUs) belonging to each user equipment (UE).
5 . The apparatus according to claim 1 , wherein the MAC header identifies concatenation format index.
6 . The apparatus according to claim 5 , wherein the MAC header identifies concatenation size or number of concatenated packets.
7 . The apparatus according to claim 5 , wherein the MAC header identifies group user equipment's (UEs) contained in the concatenated packets.
8 . A method for concatenating data packets for ultra-reliable low-latency communication in a wireless communication system with transmission and receiver points (TRP), the method comprising:
monitoring transmits packet buffer queue for different user equipment (UE);
classifying buffered packets of each user equipment (UEs) based on associated quality of service profile index;
setting the concatenation packet group buffer time limit by establishing a concatenation packet timer based on the associated quality of service (QOS) profile index and (RRC) configuration signaling;
determining the target classified packet group (PG Q ) for candidate concatenation transmission;
regrouping packet group (PG Q ) for using the same modulation coding scheme MCS index (PG M ) based on each user equipment (UE) feedback information;
checking if regrouping packet group (PG M ) is available;
if regrouping packet group (PG M ) is not available, scheduling packets without concatenation for regrouping packet group (PG Q );
if regrouping packet group (PG M ) is available, selecting regrouping packet group (PG M ) for transmission based on the measured metric for selection criteria determination of transport block size threshold (TB T ) for transmission based on the-schedule resource and/or buffered data; and
checking if regrouping packet group (PG M ) is smaller or equals of the block size threshold (TB T ) and if regrouping packet group (PG M ) is smaller or equals of the block size threshold (TB T ) forming a transport block for downlink transmission to target user equipment (UE) group with concatenated data packets.
9 . The method according to claim 8 , wherein based on the queued packet buffer with different UEs, Quality of Service (QOS) profile based packet classification proceeds.
10 . The method according to claim 8 , wherein concatenation packet timer is set, that the buffer packets for concatenation grouping is timely transmitted after the limited delay time.
11 . The method according to claim 8 , that, wherein the candidate packet group (PG Q ) is selected based on the pre-determined quality of service profile index to be used for concatenation.
12 . The method according to claim 8 , wherein the feedback information is Chanel State information (CSI).
13 . The method according to claim 8 , wherein the selection criteria are the Modulation Coding method (MCS).
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16 . The method according to claim 8 , wherein the selection criteria is a highest priority level.
17 . The method according to claim 8 , wherein the selection criteria is the maximum of Modulation Coding Scheme (MCS) level.
18 . The method according to claim 8 , wherein the selection criteria are maximum number of packets in concatenation.
19 . The method according to claim 8 , wherein among candidate packet group with same modulation coding scheme (MCS) index for use, target packet group is chosen for concatenation transmission based on the pre-determined criteria.
20 . The method according to claim 8 , wherein a packet group buffer time is set as time threshold value to secure that concatenation transmission is complete before this packet group buffer time threshold expires.
21 . A method for triggering a concatenated transmission for ultra-reliable low-latency communication in a wireless communication system with transmission and receiver points (TRP), comprising:
monitoring traffic load status (TS) with periodic time;
measure traffic load level (TL) based on a pre-determined threshold (TL th );
triggering concatenation scheduling event if traffic load level (TL) exceeds pre-determined threshold (TL th );
concatenating data packets by:
monitoring transmits packet buffer queue for different user equipment (UE);
classifying buffered packets of each user equipment (UEs) based on associated quality of service profile index:
setting the concatenation packet group buffer time limit by establishing a concatenation packet timer based on the associated quality of service (OoS) profile index and (RRC) configuration signaling;
determining the target classified packet group (PG Q ) for candidate concatenation transmission;
regrouping packet group (PG Q ) for using the same modulation coding scheme MCS index (PG M ) based on each user equipment (UE) feedback information;
checking if regrouping packet group (PG M ) is available;
if regrouping packet group (PG M ) is not available, scheduling packets without concatenation for regrouping packet group (PG Q );
if regrouping packet group (PG M ) is available, selecting regrouping packet group (PG M ) for transmission based on the measured metric for selection criteria determination of transport block size threshold (TB T ) for transmission based on the-schedule resource and/or buffered data; and
checking if regrouping packet group (PG M ) is smaller or equals of the block size threshold (TB T ) and if regrouping packet group (PG M ) is smaller or equals of the block size threshold (TB T ) forming a transport block for downlink transmission to target user equipment (UE) group with concatenated data packets.
22 . The method according to claim 21 , wherein traffic load status is based on the data buffer volume and/or signaling traffic and/or transmission delay.
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