Abstract:
LTE-Advanced (LTE-A) systems support wider transmission bandwidths and hence, higher data rates for bulk traffic, as a result of Carrier Aggregation (CA). However, existi...Show MoreMetadata
Abstract:
LTE-Advanced (LTE-A) systems support wider transmission bandwidths and hence, higher data rates for bulk traffic, as a result of Carrier Aggregation (CA). However, existing literature lacks efforts on channel-aware CA, especially in the uplink. The cell-edge users particularly suffer from exhaustion of resources, higher fading losses, lower SINR values (hence, requiring a higher power consumption) due to lossy channels that their traffic requirements are least-satisfied by channel-blind CA. This paper addresses the above concern by proposing an edge-prioritized channel- and traffic-aware uplink CA comprising Component Carrier (CC) assignment and resource scheduling. The LTE-A UEs are spatially-grouped and the under-represented edge UE groups, having the least assignable resources (good CCs), are prioritized for CA. This results in assigning the best channels to the edge groups. The frequency resources are scheduled to the groups based on inter-group and intra-group Proportional Fair Packet Scheduling (PFPS) in the time and frequency domains respectively, to resolve resource contention. The proposed approach outperforms the existing channel-blind Round-Robin and channel-aware Opportunistic CA, in terms of overall uplink throughput, by 33% in CC assignment and 21% in PFPS, in addition to significant throughput improvements for the edge UEs.
Published in: 2012 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)
Date of Conference: 25-28 June 2012
Date Added to IEEE Xplore: 09 August 2012
ISBN Information:
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Carrier Aggregation ,
- LTE-advanced Systems ,
- Opportunistic ,
- High Power ,
- Time Domain ,
- Frequency Domain ,
- Underrepresented Groups ,
- Signal-to-interference-plus-noise Ratio ,
- Throughput Improvement ,
- Frequency Resources ,
- Frequency Band ,
- Secondary Cell ,
- Base Station ,
- Transmission Power ,
- Channel State ,
- Time Slot ,
- Path Loss ,
- Cell Edge ,
- Bitrate ,
- Resource Block ,
- Radio Resource Management ,
- Transmission Time Interval ,
- Traffic Scenarios ,
- Spectral Efficiency ,
- Achievable Throughput ,
- Requirement In Group ,
- Channel Quality ,
- Load Balancing ,
- Channel Capacity
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Carrier Aggregation ,
- LTE-advanced Systems ,
- Opportunistic ,
- High Power ,
- Time Domain ,
- Frequency Domain ,
- Underrepresented Groups ,
- Signal-to-interference-plus-noise Ratio ,
- Throughput Improvement ,
- Frequency Resources ,
- Frequency Band ,
- Secondary Cell ,
- Base Station ,
- Transmission Power ,
- Channel State ,
- Time Slot ,
- Path Loss ,
- Cell Edge ,
- Bitrate ,
- Resource Block ,
- Radio Resource Management ,
- Transmission Time Interval ,
- Traffic Scenarios ,
- Spectral Efficiency ,
- Achievable Throughput ,
- Requirement In Group ,
- Channel Quality ,
- Load Balancing ,
- Channel Capacity
- Author Keywords