Small Cells: Enterprise, Metro & Rural


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Small Cells: Enterprise, Metro & Rural

  1. 1. Small Cells:Enterprise, Metro & RuralFemtocells for 3GMindspeed TechnologiesMobile World CongressFeb 27 - March 1, 2012 Nasdaq: MSPD
  2. 2. Enterprise and Metro 3G Small Cells Requirements for Enterprise and Metro 3G Baseband  Stable PHY  RX Diversity Support (uplink user count)  MIMO/Dual Carrier Support  Multiple SKUs supported off of common SW and minimum PCB variants  SmartSignaling™  Wide cell radius for rural applications (3km)  High mobility for rural and metro (120km/h)  Soft Handover support  Required for outdoor cells  Best customer experience for indoor  Wide range of user counts  Low cost and low power Nasdaq: MSPD
  3. 3. Small Cell Platform: Femtocell EconomicsServes wide range of applications 64 users Metro 16-24 users 32 users Enterprise Rural User Count 8 users PC3064 SOHO PC3024 PC3032 PC3008 Residential Femtocell Enterprise Femtocell Public Space Picocell Nasdaq: MSPD
  4. 4. PC30xx Low Cost Femto Products PC3032Single PCB, Single SW load Metro 32 Users LABS 2TX + RX Diversity One PCB, 4 product SKUs PC30xx 24dBm High Performance PC3024 Enterprise 24-users 2TX + RX Diversity PC3016 24dBmPerformance PC3008 Next Generation Femto Small Office Femto 8-users 16 Users RX Diversity 2TX + RX Diversity 13-20dBm 20dBm PC30xx PC3008 Low Cost PC3016 Residential Femto Small Office Femto One PCB, 2 product SKUs 8-users 16 Users SISO RX Diversity 13-20dBm 20dBm User Count Nasdaq: MSPD
  5. 5. smartSignaling™ Benefits  Reduced Signaling Traffic in the Network  Higher Effective User Count  Improved UE Battery Life Nasdaq: MSPD
  6. 6. smartSignaling™ Reduced Signaling  Before smartSignaling™ - UEs cycle between Idle and cell_DCH states to save power - Connection is created and torn down for each transition RRC Connection Request 15-20 cell_DCH messages to the network Data Large Data Idle RRC Exchange Connection Inactivity Mode Release Small Data cell_FACH Exchange Data Inactivity Date/Control To be Sent cell_PCH/ URA_PCH Nasdaq: MSPD
  7. 7. smartSignaling™ Reduced Signaling Load cell_FACH cell_DCH  Enhanced cell_FACH RRC  New states supported in the UE Connection Request - Cell_FACH/cell_PCH/URA_PCH cell_DCH - UE connection state is maintained - Less messaging traffic as Data Large Data Idle connection is not torn down Inactivity Exchange Mode RRC Connection Small Data Release cell_FACH Exchange - Data transmission still occurs using Data common channels Inactivity Date/Control • RACH/FACH (low speed UL/DL) To be Sent • Common E-DCH (high speed UL) cell_PCH/ • HSPDA is shared (high speed DL) URA_PCH Nasdaq: MSPD
  8. 8. cell_FACHsmartSignaling™ Higher Effective User Count cell_DCH  Dedicated channels are not used to maintain connection  Data users not limited by dedicated channel capacity - Traditional ‘user count’  Limited instead by RACH/FACH capacity, common channel capacity  Results in 100s of users being 100s of UEs supported Nasdaq: MSPD
  9. 9. cell_FACH cell_DCHsmartSignaling™ Improved UE battery life RRC Connection Request  Enhanced cell_FACH states use cell_DCH lower power on PA Data Large Data Idle Exchange Inactivity Mode  Much improved battery life RRC Connection Small Data compared to connections with Release cell_FACH Exchange dedicated channels Data Inactivity Date/Control To be Sent cell_PCH/ URA_PCH Nasdaq: MSPD
  10. 10. Rx Diversity  Two antennas with maximal ratio combining - Improved performance relative to simple antenna switching  No loss of user/channel capacity  Improves reception and uplink performance  Improves pole capacity of the UE - Vital in order to support capacity much above 8 users Nasdaq: MSPD
  11. 11. DC– Dual Cell/Dual Carrier  What is Dual Cell or Dual Carrier? - Use of 2 adjacent 5 MHz channels in DL and/or UL (release 8) - Non-adjacent channels (Release 9)  Why - Better data rates where radio conditions don’t favour MIMO • MIMO requires good channel conditions and low correlation between antennas - Scheduling gains improve user experience • Throughput • Latency • Cell balancing - Better capacity than with separate NodeB implementation - Better throughput and capacity than MIMO - Macrocell parity - UE categories 21-24 required Nasdaq: MSPD
  12. 12. PC3032 Public Network / Picocell  Local Area Basestation defined class in 3GPP -- Picocell - High data rates and user capacity - Maximum Tx power ≤ 24 dBm - 120 km/h UE mobility  PC3032M enables a Picocell - 32 users - TX MIMO or Dual Carrier - RX Diversity - Soft Handover - Metro / City centre - Rural  Femtocell Economics - SoC Baseband - Multiple RF Providers Nasdaq: MSPD
  13. 13. Soft-Handover Solves Problems in the Enterprise/Metro In Soft Handover overlapping NodeBs Communicate simultaneously with UE. DL signal is summed at UE. Similar for UL Case which reduces UE UL interference. Without Soft Handover calls can get dropped Enterprise Femtocells must support Soft Handover to work effectively in dense deployments Nasdaq: MSPD