Nokia

About: Nokia is a company organization based out in Espoo, Finland. It is known for research contribution in the topics: Signal & Mobile station. The organization has 16625 authors who have published 28347 publications receiving 695725 citations. The organization is also known as: Nokia Oyj & Oy Nokia Ab.

Electronic coupon system

Abstract: A system for issuing electronic coupons. A master coupon is provided by a service which may be copied by customers and placed into their individual electronic wallets. The coupons may have a variable benefit or value which may be established by a variety of parameters. The parameters include a set time period, certain action by the customer, the purchase of specific items, the purchase of specific dollar values, or external parameters such as the score in a baseball game. The coupons may be transferred or recopied by the customer as desired. The customer may gain additional benefits by recopying the coupons to others.

F-RTO: an enhanced recovery algorithm for TCP retransmission timeouts

Abstract: Spurious TCP retransmission timeouts (RTOs) have been reported to be a problem on network paths involving links that are prone to sudden delays due to various reasons. Especially many wireless network technologies contain such links. Spurious retransmission timeouts often cause unnecessary retransmission of several segments, which is harmful for TCP performance. Recent proposals for avoiding unnecessary retransmissions after a spurious RTO require use of TCP options which must be implemented and enabled at both ends of teh connection. We introduce a new TCP sender algorithm for recovery after a retransmission timeout and show that unnecessary retransmissions after a spurious retransmission timeout, improving the TCP performance considerably. The algorithm is friendly towards other TCP connections, because it follows the congestion control principles and injects packets to the network at same rate as a conventional TCP sender. We implemented the algorithm and compared its performance to conventional TCP and Eifel TCP when RTOs occurred either due to sudden delays or due to packet losses. The results show that our algorithm either improves performance or gives similar througput as the other TCP variants evaluated in different test cases.

A Multimode Transmitter in 0.13 $\mu\hbox{m}$ CMOS Using Direct-Digital RF Modulator

Abstract: This paper presents a system-independent transmitter architecture based on a direct-digital RF-modulator which combines the D/A conversion, up-conversion, unwanted sideband rejection, power control, and part of the digital image-rejection filtering into a single mixed-signal circuit block. The multimode capability of the architecture is demonstrated with WCDMA, EDGE, and WLAN system requirements. The modulator achieves 90 dB of power control range and with an external power amplifier module, WCDMA EVM of less than 2% from signal powers of -20 dBm to +25 dBm. The noise floor level defined by the quantization noise at 190 MHz offset from the carrier is -150 dBc/Hz measured at the output of the PA with +25 dBm signal power. The analog power consumption with the maximum signal power level is 92 mW and scales down to 46 mW when reducing the signal level to -43 dBFS. The digital power consumption is 65 mW. The chip is implemented with a standard 0.13 mum 1.2 V digital CMOS with total silicon area of 4 mm2.

Automated grouping of image and other user data

Abstract: A user selects a data file (e.g., an image file) from an interface (e.g., a thumbnail view). Upon selecting a file from the interface, the contents of that file are presented to the user in an appropriate manner (e.g., providing an enlarged image display). The selected file is also moved to a separate folder. As the contents of additional files are presented to the user, those files are also moved to the separate folder. A new folder is created when the user returns to the interface and selects another file from that interface, or alternatively, upon instruction from the user to create a new folder. The user may then rename or otherwise modify the folder(s).

Method and apparatus for providing interference measurements for device to-device communication

Abstract: An approach for providing interference measurements for device-to-device communication is disclosed. A logic generates a control signal to instruct a plurality of stations to perform measurement relating to interference or path loss by the stations. The logic then receives measurement information from the stations and determines, based on the measurement information, whether resources are to be scheduled to provide direct communication between two of the stations.