NodeB H-RNTI Association for CELL_FACH Data Scheduling
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Solution Overview
Problem
In the 3GPP system, User Equipment (UE) in the CELL_FACH state cannot receive High-Speed Downlink Shared Channel (HSDPA) related channels due to the lack of a notification mechanism for the High-Speed Downlink Shared Channel Radio Network Temporary Identifier (H-RNTI) from the Radio Network Controller (RNC) to the NodeB, leading to inefficient data scheduling and transmission.
Innovation Solution
A method where the NodeB receives and processes data frames or signaling from the RNC to obtain and associate the dedicated H-RNTI with corresponding user data, enabling the NodeB to schedule and transmit user data efficiently by broadcasting the H-RNTI via the HS-SCCH channel and transmitting data via the HS-PDSCH channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the NodeB does not receive H-RNTI from the RNC, then the signaling overhead is reduced, but the UE in CELL_FACH state cannot receive HSDPA channels and data transmission efficiency deteriorates
Solution Approach 1:
The patent introduces the H-RNTI as an intermediary identifier that enables the NodeB to address and transmit data to specific UEs in CELL_FACH state. The H-RNTI acts as a mediator between the RNC's data scheduling decisions and the UE's data reception, allowing efficient targeted transmission without requiring continuous RNC-NodeB signaling for each UE identification.
Solution Approach 2:
The H-RNTI is allocated and configured in advance for UEs that may enter CELL_FACH state, enabling the NodeB to immediately perform efficient data transmission when such UEs are in this state, without requiring real-time signaling setup. This preliminary configuration resolves the contradiction by preparing the identification mechanism beforehand.
2Measurement precision
If the NodeB obtains and associates H-RNTI with user data, then data scheduling accuracy is improved, but the device complexity increases
Solution Approach 1:
The NodeB autonomously performs the association of H-RNTI with user data and scheduling decisions without requiring complex external control or coordination. The NodeB uses the received H-RNTI information to independently manage data scheduling and transmission, simplifying the overall system architecture while maintaining high scheduling accuracy.
3Adaptability or versatility
If the UE in CELL_FACH state can receive HSDPA channels, then the service capability is enhanced, but the protocol complexity increases
Solution Approach 1:
The H-RNTI mechanism provides a universal solution that enables UEs in CELL_FACH state to receive HSDPA channels using the same identification and scheduling framework already established for other states. This multi-functional approach enhances service capability without requiring separate complex protocol mechanisms for different UE states.
Data Source
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AI summary
A method and apparatus for obtaining a temporary identifier are disclosed. The method includes: receiving a data frame and obtaining from the data frame a temporary identifier that identifies a user in a Radio Resource Control (RRC) connected state. After obtaining the one or more temporary identifiers; the method further includes: associating the one or more temporary identifiers with corresponding user data; broadcasting the one or more temporary identifiers, instructing a user corresponding to the one or more temporary identifiers to receive user data, and transmitting the user data associated with the one or more temporary identifiers. According to the present invention, the NodeB is notified of the radio network temporary identifier allocated to a user in the RRC connected state so that the NodeB can associate the one or more temporary identifiers with the corresponding user data and thereby schedule data and transmit user data for the user smoothly.