Progress made in specifying the GERAN

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Progress made in specifying the GERAN

• Andrew Howell, Chairman (Motorola)
• Marc Grant, Vice-Chairman (Cingular Wireless)

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TSG-GERAN Overview (1 of 4)

• Brought under the 3GPP umbrella in 2000
• Formerly known as ETSI SMG2
• TSG GSM/EDGE Radio Access Network (TSG-GERAN) is
  the committee responsible for the radio aspects
  of the GSM/EDGE technologies
• Andrew HOWELL, Chairman (Motorola)
• Marc GRANT, Vice-Chairman (Cingular)
• Juergen HOFFMAN, Vice-Chairman (Siemens)
• Guillaume SEBIRE, Vice-Chairman (Nokia)
• Paolo USAI, Secretary (ETSI MCC)

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TSG-GERAN Overview (2 of 4)

• Working Group 1 - Radio specifications
• Chairman Jacques ACHARD (Alcatel)
• Secretary Paolo USAI (ETSI MCC)
• RF aspects of GERAN
• GERAN radio performance and RF system aspects

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TSG-GERAN Overview (3 of 4)

• Working Group 2 Protocol Aspects
• Chairman Guillaume SEBIRE (Nokia)
• Secretary Gert THOMASON (ETSI MCC)
• GERAN Radio Layer 2 specification
• GERAN Radio Layer 3 RR specification
• A interface specification, Gb interface
  specification
• Internal GERAN interface specifications such as
  Abis

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TSG-GERAN Overview (4 of 4)

• Working Group 3 Terminal Testing
• Chairman Ilya GONOROFSKY (Motorola)
• Secretary Stoyan BAEV (ETSI MCC)
• Radio layer and protocol aspect test
  specifications

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What is Already ProvidedA story of continued
improvement (1 of 3)

• Release 99 Aspects
• Dual Transfer Mode within GSM and GPRS (DTM)
• General Packet Radio Service enhancements
• GSM on 400 MHz Frequency Band
• Enhanced Data rates for GSM Evolution (EDGE)
• Enhanced GPRS (EGPRS)
• Enhanced Circuit Switched Data (ECSD)
• Release 4 aspects
• Lower 700 MHz spectrum support

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What is Already ProvidedA story of continued
improvement (2 of 3)

• Release 5 aspects
• GERAN/UTRAN interface evolution 1 Evolution of
  Iu PS
• GERAN/UTRAN interface evolution 2 Evolution of
  Iu CS
• 8PSK AMR HR
• GERAN enhancements for streaming services
• Enhanced Power Control
• GERAN support for IMS

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What is Already ProvidedA story of continued
improvement (3 of 3)

• Release 6 aspects
• Addition of frequency bands to GSM
• Seamless support of streaming services in A/Gb
  mode
• Flexible Layer One for GERAN
• Downlink Advanced Receiver Performance (DARP)
• Uplink TDOA location determination
• (for GPRS, PS domain)
• (for GSM, CS domain)
• Support of PS Handover for GERAN A/Gb mode
• Generic Access to A/Gb interface (GAN)
• Multimedia Broadcast/Multicast Service (MBMS)

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What will be available in the FutureThe story of
improvements continues

• Other Release 7 and beyond aspects
• Global Navigation Satellite System (GNSS)
• DTM Handover
• VGCS Enhancements
• PS Conversational Services
• MBMS Enhancements
• GERAN Evolution

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GERAN Evolution (1 of 2)

• Operators of GSM/GPRS systems need an evolution
  and interoperability strategy
• Evolution of the GSM/EDGE radio access
  technologies offers such a path.
• This approach helps ensure that systems based on
  the 3GPP specifications are capable of rapid
  development and deployment of competitive service
  offerings while still enabling global roaming and
  service transparency
• Current Study Item for GERAN evolution to be
  concluded in September 2006

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GERAN Evolution (2 of 2)

• Work items approved so far for GERAN Evolution
• MS receive diversity
• Dual Carrier for the downlink
• Currently under study
• Various uplink enhancement schemes
• Latency improvements

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GERAN Evolution an example (1 of 4)MS Receiver
Diversity

• The aim of MS diversity is to enhance the
  reception of a given link in the downlink
  direction, by means of diversity provided by an
  additional antenna.
• Thus, receiver diversity is based on reception of
  the same signal on two antennas in the MS.
• Therefore no changes are made to the
  transmissions schemes in the base transceiver
  station (BTS).

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GERAN Evolution an example (2 of 4)MS Receiver
Diversity

• Seen from the Layer 1 in the MS, the introduction
  of MS Receiver diversity will be a general link
  level improvement.
• That is, the signals received by the two antennas
  are to be combined as one link.
• Therefore existing algorithms and procedures such
  as link adaptation, bit error probability
  estimation and RXQUAL are expected to remain
  unchanged in the sense that these measures simply
  reflect improved link quality

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GERAN Evolution an example (3 of 4)MS Receiver
Diversity

• Model of the environment surrounding a dual
  antenna MS.

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GERAN Evolution an example (4 of 4)MS Receiver
Diversity

• MSRD is a downlink feature, which improves the
  receiver performance of the mobile station by
  means of an additional antenna.
• The introduction of Single Antenna Interference
  Cancellation (SAIC) characterised by the Downlink
  Advanced Receiver Performance (DARP) requirements
  has already shown that receiver enhancements in
  the MS can provide significant gains in terms of
  spectral efficiency.
• MSRD offers the possibility of enhanced channel
  diversity and the potential for further improved
  interference cancellation performance for GMSK
  modulated signals as well as significant gains
  for 8PSK-modulated signals.
• Therefore gains in both user throughput and
  system capacity can be achieved.

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Conclusion

• TSG GERAN works to improve GSM/EDGE based
  systems, as well as providing a platform for a
  smooth migration path to other 3GPP based system
  (e.g. UMTS)
• Since its beginning, TSG GERAN has worked to
  improve the efficiency and capabilities of
  GSM/EDGE based systems with the goal of bringing
  benefits both to the operator and subscriber
• TSG GERAN continues to work to provide as many 3G
  like services as possible to enable operators to
  have a wide choice of options for network
  deployment strategies
• Moving forward TSG GERAN will continue to support
  the needs of GSM/EDGE operators and will continue
  to work on introducing new services and
  improvements as and when desired by the market
  place.

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• THANK YOU
• for the opportunity of providing you with
  information relating to the work of TSG GERAN
• Companies from China play an important role
  within TSG GERAN and we look forward to your
  continued involvement