RNC Signaling for CCCH to E-DCH MAC Flow Mapping
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Solution Overview
Problem
Current protocols do not provide a clear method for the network side to inform the UE about the mapping relationship between logical channels and E-DCH MAC flows, leading to inconsistencies in HARQ profile information between the UE and NodeB, resulting in decoding errors.
Innovation Solution
The RNC informs the UE of the corresponding relationship between CCCH and E-DCH MAC flows through signaling, including power offset and maximum retransmissions, ensuring both entities can accurately determine the E-DCH MAC flow and HARQ profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network side does not inform the UE about the mapping relationship between logical channels and E-DCH MAC flows, then the protocol remains simple, but the UE and NodeB cannot determine the correct HARQ profile, leading to decoding errors
Solution Approach 1:
The RNC performs preliminary action by determining and informing the UE about the mapping relationship between logical channels and E-DCH MAC flows before actual data transmission. This includes providing E-DCH MAC flow identification, power offset, maximum retransmissions, and multiplexing indicators in advance through signaling, so that both UE and NodeB have consistent HARQ profile information ready for decoding operations.
2Reliability
If the UE cannot determine which E-DCH MAC flow to use for CCCH, then the protocol implementation is simpler, but the UE and NodeB have inconsistent HARQ profile information, causing decoding errors
Solution Approach 1:
The RNC acts as an intermediary that resolves the mapping relationship between logical channels and E-DCH MAC flows. It provides this mapping information through signaling to the UE, ensuring both UE and NodeB have consistent understanding of which E-DCH MAC flow (and corresponding HARQ profile) should be used for specific logical channels like CCCH, DCCH, and DTCH.
Data Source
Figure 1~2
AI summary
The present disclosure discloses a method for mapping a logical channel to a Media Access Control (MAC) flow, the method includes: a Radio Network Controller (RNC) informs a User Equipment (UE) of corresponding relationship between a Common Control Channel (CCCH) and an Enhanced-Dedicated Channel (E-DCH) MAC flow through signaling; the UE receives the signaling, and obtains the corresponding relationship between the CCCH and the E-DCH MAC flow. The present disclosure further discloses a system for mapping a logical channel to an MAC flow. Through the method and system disclosed in the present disclosure, it is convenient for both a Node B (NodeB) and UE can accurately obtain the corresponding relationship between the CCCH and the E-DCH MAC flow, which ensures the NodeB decodes correctly, thus improving the success rate in receiving signaling and data.