Method and system for repeating data during switching course
A technology for switching processes and data, applied in the field of communication, can solve problems such as large delays, and achieve the effects of reducing delays, ensuring reliability, and reducing complexity
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example 1
[0100] Method example 1: a combination of the above-mentioned method 11, method 21 and method 31.
[0101] L11. When the source eNodeB receives the handover confirmation from the target eNodeB or the source eNodeB sends a handover command to the user side, the source eNodeB will, according to the order in which it is received, select the SDUs that are not correctly confirmed by the user side or start from the first SDU that is not correctly confirmed by the user side The SDU is forwarded to the target eNodeB. At the same time, the last SDU forwarded is identified through the transmission network; or, a timer is set on the target eNodeB side, and if an SDU is not received within the time limit, the target eNodeB determines the arrival of the forwarding data node accordingly.
[0102] L12. The target eNodeB generates a corresponding RLC entity to buffer the received SDU. After receiving the handover confirmation or synchronization information from the user side, the user plane ...
example 2
[0110] Method example 2: a combination of the above-mentioned method 12, method 21 and method 32.
[0111] L21 and L22 are the same as L11 and L12.
[0112] L23. In the process of sending the SDU to the user side, the target eNodeB adds an indication bit to the packet header of the last PDU of each SDU forwarded; or identifies the last PDU of each SDU forwarded by explicit signaling.
[0113] L24 is the same as L14.
[0114] L25 is the same as L15.
[0115] L26. When the RLC on the user side submits the SDUs corresponding to the identified PDUs to the PDCP layer or ends the RLC sorting, it notifies the PDCP layer that the out-of-order reception is completed, and submits the subsequent received SDUs in order; that is, the unidentified PDUs are correctly received. Afterwards, the user side delivers the SDUs corresponding to the PDU number greater than or equal to the unidentified PDU number N in the RLC receiving buffer in order, and must wait until the PDU with the PDU number...
example 3
[0118] Method Example 3: Combination of the above method 11, method 22 and method 34.
[0119] L31 to L34 are the same as L11 to L14.
[0120] L35. The RLC on the user side caches the PDUs sent by the target eNodeB and sorts them according to the PDU numbers. When the RLC on the user side receives the identified PDUs correctly, it performs SDU verification on the cached PDUs (that is, the PDU whose number is less than or equal to the identified PDU number All PDUs of N perform SDU detection), and then submit the SDUs corresponding to the numbers whose numbers are less than or equal to the identified PDUs to the PDCP layer. SDUs corresponding to PDUs with numbers greater than N are delivered sequentially.
[0121]L36. After the RLC on the user side submits the verified SDU to the PDCP layer, it notifies the PDCP layer that data forwarding is over, and submits the subsequently received SDUs in sequence.
[0122] L37. The PDCP layer performs reordering according to the PDCP num...
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