Abstract
A method and apparatus for triggering radio link control (RLC) re-establishment and/or protocol data unit (PDU) discard are disclosed. An RLC entity maintains a state variable for counting a total number of transmissions and/or retransmissions of an RLC PDU and its PDU segments. If the state variable reaches a threshold the RLC entity initiates RLC re-establishment and/or discards the RLC PDU and PDU segments. The state variable may be incremented each time a negative acknowledgement is received for at least a portion of the RLC PDU or when a retransmission is considered for the RLC PDU or a portion of the RLC PDU. The RLC entity may increase a state variable proportionate to a retransmitted data size. The RLC entity may maintain separate state variables for the RLC PDU and PDU segments and counts the number of transmissions and/or retransmissions for the RLC PDU and the PDU segments.
A method and apparatus for triggering radio link control (RLC) re-establishment and/or protocol data unit (PDU) discard are disclosed. An RLC entity maintains a state variable for counting a total number of transmissions and/or retransmissions of an RLC PDU and its PDU segments. If the state variable reaches a threshold the RLC entity initiates RLC re-establishment and/or discards the RLC PDU and PDU segments. The state variable may be incremented each time a negative acknowledgement is received for at least a portion of the RLC PDU or when a retransmission is considered for the RLC PDU or a portion of the RLC PDU. The RLC entity may increase a state variable proportionate to a retransmitted data size. The RLC entity may maintain separate state variables for the RLC PDU and PDU segments and counts the number of transmissions and/or retransmissions for the RLC PDU and the PDU segments.
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Protocol Stack
Product
Base Station (eNB/gNB)User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Connection establishment/control/state transition
Claim
1. A method for triggering radio link control (RLC) re-establishment, the method comprising: generating an RLC protocol data unit (PDU); transmitting the RLC PDU; if one of the RLC PDU and a portion of the RLC PDU needs to be retransmitted, performing a threshold test by comparing a state variable associated with the RLC PDU with a predetermined threshold, the state variable being incremented when at least a portion of the RLC PDU is considered for retransmission; and initiating RLC re-establishment based on the threshold test.
2. The method of claim 1 wherein the state variable is not incremented when the RLC PDU or a portion of the RLC PDU considered for retransmission is already pending retransmission.
3. The method of claim 1 wherein the state variable is not incremented when a portion of the RLC PDU or a portion of the RLC PDU considered for retransmission is already in a retransmission buffer.
4. The method of claim 1 further comprising: discarding an RLC service data unit (SDU) at least a portion of which is contained in the RLC PDU; and discarding an RLC PDU and a PDU segment that contain at least a portion of the discarded RLC SDU.
5. The method of claim 1 further comprising: performing a move receive window (MRW) procedure.
6. The method of claim 1 further comprising: discarding at least one of the RLC PDU and segments of the RLC PDU.
7. The method of claim 1 wherein the state variable is set to zero when the RLC PDU is considered for retransmission for the first time.
8. An apparatus for triggering radio link control (RLC) re- establishment, the apparatus comprising: an RLC entity configured to generate an RLC protocol data unit (PDU), and if one of the RLC PDU and a portion of the RLC PDU needs to be retransmitted, perform a threshold test by comparing a state variable associated with the RLC PDU to a predetermined threshold and initiate RLC re- establishment based on the threshold test, wherein the state variable is incremented when at least a portion of the RLC PDU is considered for retransmission.
9. The apparatus of claim 8 wherein the RLC entity is configured not to increment the state variable when the RLC PDU or a portion of the RLC PDU considered for retransmission is already pending retransmission
10. The apparatus of claim 8 wherein the RLC entity is configured not to increment the state variable when a portion of the RLC PDU or a portion of the RLC PDU considered for retransmission is already in a retransmission buffer
11. The apparatus of claim 8 wherein the RLC entity is configured to discard an RLC service data unit (SDU) at least a portion of which is contained in the RLC PDU and discard an RLC PDU and a PDU segment that contains at least a portion of the discarded RLC SDU
12. The apparatus of claim 8 wherein the RLC entity is configured to perform a move receive window (MRW) procedure
13. The apparatus of claim 8 wherein the RLC entity is configured to discard at least one of the RLC PDU and segments of the RLC PDU
14. The apparatus of claim 8 wherein the RLC entity is configured to set the state variable to zero when the RLC PDU is considered for retransmission for the first time
15. A method for triggering radio link control (RLC) re-establishment, the method comprising: generating an RLC protocol data unit (PDU); transmitting the RLC PDU; if at least a portion of the RLC PDU needs to be retransmitted, performing a threshold test by comparing a state variable associated with the RLC PDU with a predetermined threshold, the state variable being increased by a data size of retransmissions of the RLC PDU and its PDU segments; and initiating RLC re-establishment based on the threshold test
16. A method for triggering radio link control (RLC) re-establishment, the method comprising: generating an RLC protocol data unit (PDU), the RLC PDU being associated with a state variable VTO; transmitting the RLC PDU; segmenting the RLC PDU into PDU segments if the RLC PDU needs to be retransmitted, each of the PDU segments being associated with a separate state variable VTi, i=l...N, N being an integer greater than 1; if at least a portion of the RLC PDU needs to be retransmitted, performing a threshold test by comparing a state variable VTi, i=0...N with a predetermined threshold, the state variable being incremented by a number of retransmissions of the corresponding RLC PDU and its PDU segment; and if at least one of the state variables VTi, i=0...N, is not smaller than a predetermined threshold, initiating RLC re-establishment
17. A method for triggering radio link control (RLC) re-establishment, the method comprising: generating an RLC protocol data unit (PDU); transmitting the RLC PDU; if at least a portion of the RLC PDU needs to be retransmitted, performing a threshold test by comparing state variables to a predetermined threshold, each of the state variable being associated with a specific portion of the RLC PDU and incremented each time the corresponding portion of the RLC PDU is retransmitted; and initiating RLC re-establishment based on the threshold test
18. An apparatus for triggering radio link control (RLC) re- establishment, the apparatus comprising: an RLC entity configured to generate an RLC protocol data unit (PDU), and if at least a portion of the RLC PDU needs to be retransmitted, perform a threshold test by comparing a state variable associated with the RLC PDU to a predetermined threshold and initiate RLC re-establishment based on the threshold test, wherein the state variable is increased by a data size of retransmissions of the RLC PDU and its PDU segments
19. An apparatus for triggering radio link control (RLC) re- establishment, the apparatus comprising: an RLC entity configured to generate an RLC protocol data unit (PDU), the RLC PDU being associated with a state variable VTO that is incremented each time the RLC PDU is retransmitted, segment the RLC PDU into PDU segments if the RLC PDU needs to be retransmitted, each of the PDU segments being associated with a separate state variable VTi, i=l...N, N being an integer greater than 1, the state variables VTi, i=l...N, inheriting a value of the state variable VTO and being incremented each time the corresponding PDU segment is retransmitted, and if at least one of the state variables VTi, i=0...N, is not smaller than a predetermined threshold, perform RLC re-establishment.
20. An apparatus for triggering radio link control (RLC) re- establishment, the apparatus comprising: an RLC entity configured to generate an RLC protocol data unit (PDU), and if at least a portion of the RLC PDU needs to be retransmitted, perform a threshold test by comparing each of a plurality of state variables to a predetermined threshold and initiate RLC re-establishment based on the threshold test, wherein each of the state variables is associated with a specific portion of the RLC PDU and incremented each time the corresponding portion of the RLC PDU is retransmitted.']
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SUMMARY
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
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