Node-B AMBR Signaling for Uplink Traffic Efficiency
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Solution Overview
Problem
Current 3GPP cellular communication systems inefficiently manage aggregate maximum bit rate (AMBR) across multiple packet data network connections, leading to wasteful resource allocation and inefficient scheduling of uplink traffic.
Innovation Solution
A method is introduced where the Node-B in the wireless communication system transmits a signaling message with an AMBR value to the wireless communication unit, allowing for improved policing and scheduling of uplink resources, ensuring that only compliant traffic is admitted and prioritized based on the AMBR values associated with each PDN connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If AMBR is enforced only at the GW for downlink traffic and NodeB is not informed of AMBR values, then the system architecture remains simple and existing protocols are maintained, but uplink traffic is inefficiently managed leading to wasted radio resources and suboptimal scheduling
Solution Approach 1:
The AMBR value is signaled to the NodeB in advance during the attach procedure or bearer establishment, before uplink traffic occurs. This allows the NodeB to proactively enforce AMBR and make informed scheduling decisions without waiting for traffic to generate, thereby improving uplink efficiency while using existing signaling channels.
Solution Approach 2:
The core network element (MME or GW) acts as an intermediary that retrieves AMBR values from subscriber databases and forwards them to the NodeB via signaling messages. This intermediary approach allows the NodeB to gain AMBR information without directly accessing subscriber databases, maintaining architectural simplicity while enabling efficient uplink management.
2Productivity
If the NodeB is informed of AMBR values and enforces them for uplink traffic, then resource utilization improves and throughput increases, but the signaling overhead and network element complexity increase
Solution Approach 1:
The AMBR value is combined with other existing signaling messages such as the Attach Accept message or bearer establishment messages. By merging AMBR signaling with already-necessary control plane communications, the patent avoids introducing separate dedicated signaling channels, thereby reducing additional overhead while still delivering AMBR information to the NodeB.
Solution Approach 2:
The signaling message that carries the AMBR value serves multiple functions: it establishes or confirms the PDN connection, provides QoS parameters, and simultaneously conveys the AMBR limit for uplink enforcement. This multi-functionality reduces the need for separate signaling exchanges, minimizing overhead while achieving comprehensive traffic management.
3Adaptability or versatility
If multiple PDN connections are supported with individual AMBR values, then service versatility and user experience improve, but the complexity of tracking and enforcing multiple AMBR values increases
Solution Approach 1:
The system segments AMBR management by maintaining separate AMBR values for each PDN connection rather than using a single aggregate limit. Each PDN connection's AMBR is independently tracked and enforced at the NodeB, allowing fine-grained control over traffic from different networks while keeping the enforcement logic modular and manageable through association with specific bearer identifiers.
Data Source
AI summary
A method of signaling in a wireless communication system (300) comprising a first network element (310) serving a wireless communication unit (325) with at least one packet data network (PDN) connection. The method comprises transmitting, by the first network element (310) to the wireless communication unit (325), a signaling message relating to a wireless communication unit (325) uplink (UL) PDN transmission, where the signaling message comprises a parameter indicative of at least one aggregate maximum bit rate (AMBR) value.