| 1. |
- Berg, Miguel, et al.
(författare)
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A Radio Resource Management Concept for "Bunched" Personal Communication Systems
- 1997
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Konferensbidrag (refereegranskat)abstract
- The radio resource management (RRM) techniques used in current 2nd generation mobile communication systems rely heavily on fixed frequency or timeslot allocation techniques which are not well suited for large variations in data rates. Spread spectrum systems proposed provide partial solutions to this problem but exhibit deficiencies when faced with uneven user populations. The overall objective of ACTS project AC090 FRAMES is to define, develop and evaluate a wideband multiple radio access scheme fulfilling the UMTS requirements. Within the project several RRM concepts have been proposed. The "bunch" concept discussed in this paper uses synchronous dynamic physical layer radio resource reservation combined with fast SIR based power control in a local cluster ("bunch"). Uncontrolled, "inter bunch", interference is handled by time/frequency hopping ("interference averaging"). In the paper some initial performance results are presented.
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| 2. |
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| 3. |
- Berg, Miguel
(författare)
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Concept for hybrid random/dynamic radio resource management
- 1998
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Ingår i: Proceedings of the 1998 9th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC '98. Part 3; Boston, MA, USA; 8 Sept. - 11 Sept. 1998. Vol. 1. - New York : IEEE. ; , s. 424-428, s. 424-428
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Konferensbidrag (refereegranskat)abstract
- Third generation mobile communication systems will allow many different services with varying demands on data rate and delay. For those systems, the fixed radio resource management (RRM) techniques used in today's low rate systems will not be appropriate to ensure efficient utilization of the radio spectrum. Dynamic RRM is necessary in order to cope with the large variations in data rate. We study the bunch concept which is a hybrid between random and dynamic RRM. Within a small synchronized cluster (bunch) we use dynamic radio resource allocation combined with SIR-based power control and between the bunches we use time/frequency hopping to average the interference. We propose an improved RRM algorithm and evaluate the performance of the bunch concept for a Manhattan scenario with mixed traffic. The performance is improved while the computational complexity is reduced compared to our previously published results for the bunch concept. We also show that the performance of a single bunch system is close to the theoretical upper bound.
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| 4. |
- Berg, Miguel
(författare)
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Maintaining high Capacity for Centralized DCA with Limited Measurements and Signaling
- 1999
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Ingår i: Proceedings of the 1999 10th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC '99, Osaka, Japan, Sept 12 - 15, 1999. - New York : IEEE.
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Konferensbidrag (refereegranskat)abstract
- Centralized dynamic channel allocation strategies can, in theory, achieve very high capacity in terms of achievable load at a certain quality level. Unfortunately, these strategies have often been considered non-feasible in practice due to the massive amount of measurements and signaling typically required. In this paper we evaluate some methods to maintain high performance while drastically reducing the measurement and signaling requirements. Our DCA algorithm is based on measurements of the link gain matrix. We show that for a microcellular Manhattan environment, only the gains from the three strongest beacons have to be measured and signaled by each mobile in order to achieve almost the same capacity as an ideal system where all beacons can be measured.
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| 5. |
- Berg, Miguel
(författare)
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The Bunch Concept
- 1997
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Ingår i: Workshop, KTH, 29 August 1997.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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