MSID Sub-Header for Relay MAC PDU Identification

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Solution Overview

Problem

In WiMAX networks, particularly those adhering to the 802.16 standard, there is a challenge in correctly identifying Mobile Station (MS) identifiers for packet data units (PDUs) during relay transmissions, as existing methods do not efficiently manage MS station identifiers (STIDs) in multi-hop networks, leading to difficulties in determining the destination MS for uplink and downlink traffic.

Innovation Solution

The method involves generating and embedding a Mobile Station (MS) station identifier sub-header (MSID-SH) for each MS MAC PDU, packing it into a single Relay MAC PDU (RPDU), and wirelessly transmitting this RPDU, which includes a header with a bitmap indicating the presence of MS PDUs, allowing correct association of PDUs with their respective MS STIDs upon reception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple MS MAC PDUs are grouped into a single Relay MAC PDU for transmission, then transmission efficiency is improved, but difficulty in identifying and associating PDUs with their respective MS STIDs increases

Engineering Contradiction:

Improvetransmission efficiencyVSAvoiddifficulty in identifying and associating PDUs

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the identification information by introducing a sub-header for each MS MAC PDU within the relay packet. Each sub-header contains the MS STID that corresponds to that specific PDU, allowing the receiving end to segment and associate PDUs with their correct destinations efficiently.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary structure (sub-header containing MS STID) between the grouped PDUs and the receiving processing logic. This intermediary carries the necessary identification information without disrupting the efficient grouped transmission structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If MS STID information is included for each MPDU in the relay packet, then accurate MS identification is improved, but packet overhead increases

Engineering Contradiction:

Improveaccurate MS identificationVSAvoidpacket overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent applies partial action by including MS STID information only where necessary - specifically in sub-headers for PDUs that require identification at the relay level. Not every PDU needs a full MS STID sub-header, allowing optimization based on actual identification requirements.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP2359641B1Addressing scheme for a relay network system

Publication Date: 2015.10.07 NOKIA SOLUTIONS & NETWORKS OY

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AI summary

According to one general aspect, a method may include collecting at least one Mobile Station (MS) Medium Access Control (MAC) Packet Data Units (PDUs), associated with at least one Mobile Station. In various embodiments, the method may also include generating at least one MS station identifier (STID) sub-header (MSID-SH), indicating for each MS MAC PDU (MPDU) a MS STID that is associated with the respective MPDU. In some embodiments, the method may include packing the MSID-SH and the at least one of MPDU into a single Relay MAC PDU (RPDU). In various embodiments, the method may also include wirelessly transmitting the RPDU.