Power allocation method for multicast services

• US 7,085,575 B2
• Filed: 08/18/2003
• Issued: 08/01/2006
• Est. Priority Date: 08/18/2003
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Fabien, Jean-Aicard, Ghosh, Amitava, Ratasuk, Rapeepat
• Primary Examiner(s): Appiah, Charles N.
• Assistant Examiner(s): FOX, BRYAN J
• Application Number:
  US10/643,816
• Publication Number:
  US 20050043033A1
• Time in Patent Office: 1,079 Days
• Field of Search: 455/450, 455/518, 455/519, 455/520, 455/522, 455/452.1, 455/452.2
• US Class Current: 455/452.1
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

In a mobile telecommunication system (10), a number of user equipments (40–45) may receive multimedia broadcast multicast services. The method for power allocation and user assignment for MBMS services determines any number (K) of user equipments which may be served without complete cell area coverage (78). For more than K user equipments (40–45) requesting MBMS services, dedicated channels are assigned (84). For user equipments requesting MBMS service during a broadcast, such user equipment is assigned to the channel (broadcast or dedicated) with the lower power requirement, if power is available. If the user is assigned to the broadcast channel, and power is available, power of the broadcast channel is adjusted (108). Otherwise, the power of the broadcast channel is increased and no further power is indicated as being available (112).

Claims

1. A power allocation and user assignment method for multimedia broadcast multicast services (MBMS services) in a mobile communication system, the power allocation and user assignment method comprising the steps of:

transmitting a pilot signal to a plurality of user equipments;

collecting by a radio network controller (RNC) of the mobile communication system a signal/noise ratio (S/N) of the pilot signal as received by the plurality of user equipments;

sorting by the RNC the plurality of user equipments by the strength of the S/N of the pilot signal from a strongest pilot signal to a weakest pilot signal;

determining a number (K) of a particular user equipment of the plurality of user equipments to support on a broadcast channel;

determining by the RNC a coverage area within the cell for the MBMS services; and

assigning a portion of the plurality of user equipments, one through K, to the broadcast channel, wherein the step of determining the number K includes a step of;

2. A power allocation and user assignment method for multimedia broadcast multicast services (MBMS services) in a mobile communication system, the power allocation and user assignment method comprising the steps of:

transmitting a pilot signal to a plurality of user equipments;

sorting each of the plurality of user equipments by a strength of the pilot signal;

determining a number (K) of a particular user equipment of the plurality of user equipments to support on a broadcast channel; and

assigning a portion of the plurality of user equipments, one through K, to the broadcast channel, wherein the step of determining the number K includes a step of;