摘要:
The present invention concerns methods for efficiently supporting Voice over Internet Protocol (VoIP) on the Forward Packet Data Channel (F-PDCH) in CDMA 2000 1xEV-DV systems. Active speech in VoIP is encoded using, for example enhanced variable rate codec (EVRC), which produces 171, 80 and 16 bits per 20 ms of speech for Rate 1, Rate ½ and Rate ⅛, respectively. However, about 60% of the time a user is inactive during a speech session, so an inordinate amount of system bandwidth is comprised of rate ⅛ VoIP packets. In one embodiment of the present invention the apparatus of the present invention identifies the Rate ⅛ voice frame packets and discards them. In another embodiment of the present invention, the apparatus of the present invention identifies the Rate ⅛ voice frame packets and selects some of them for further transmission. In both embodiments the efficiency of channel utilization is increased since the amount of channel band width used to communicate relatively little information, e.g., gaps of silence, is decreased.
摘要:
The present invention concerns methods for efficiently supporting Voice over Internet Protocol (VoIP) on the Forward Packet Data Channel (F-PDCH) in CDMA 2000 1xEV-DV systems. Active speech in VoIP is encoded using, for example enhanced variable rate codec (EVRC), which produces 171, 80 and 16 bits per 20 ms of speech for Rate 1, Rate 1/2 and Rate 1/8, respectively. However, about 60% of the time a user is inactive during a speech session, so an inordinate amount of system bandwidth is comprised of rate 1/8 VoIP packets. In one embodiment of the present invention the apparatus of the present invention identifies the Rate 1/8 voice frame packets and discards them. In another embodiment of the present invention, the apparatus of the present invention identifies the Rate 1/8 voice frame packets and selects some of them for further transmission. In both embodiments the efficiency of channel utilization is increased since the amount of channel band width used to communicate relatively little information, e.g., gaps of silence, is decreased.
摘要:
Apparatus, and an associated method, for allocating radio resources in a radio communication system that provides for data communication services, e.g., reverse link communication services in which data is communicated by a mobile station to a network part of the communication system. A multi level control mechanism is provided in which a lower level radio airlink manager and an upper level radio airlink manager are used together to allocate resources to a mobile station to effectuate the communication service. Both centralized and distributed control is thereby provided.
摘要:
Various embodiments are disclosed relating to techniques to transmit data rate control signals for multicarrier wireless systems. According to an example embodiment, a wireless apparatus may be adapted to transmit at least a first data rate control (DRC) value via an in-phase channel and at least a second DRC value via a Quadrature-phase channel. The first DRC value may be associated with a first forward link carrier and the second DRC value may be associated with a second forward link carrier. In this manner, DRC values may be transmitted over both the I and Q channels, for example.
摘要:
An approach is provided for acknowledgement signaling in multi-carrier system. A plurality of acknowledgement signals are received corresponding to a plurality of transmission carriers. The transmission carriers are associated with a first direction of transmission. Some of the acknowledgement signals are allocated to a first transmitter branch, and remaining ones of the acknowledgement signals are allocated to a second transmitter branch. The plurality of acknowledgement signals are transmitted over a single transmission carrier associated with a second direction of transmission.
摘要:
An approach is provided for adaptively adjusting a threshold relating to a loading condition of a communication link. The threshold (e.g., rise over thermal (ROT) threshold) is adaptively adjusted the threshold based on an overshoot rate parameter that specifies number of times a target rate is exceeded and based on number of occurrences of an overshoot event.
摘要:
An approach is provided for addressing in a multiple carrier communication system. In one embodiment, a group index is assigned to a group of terminals of a communication network. The group index permits sharing of addressing indices supported by the communication network for transmission of data to the group of terminals. In another embodiment, a plurality of terminals is classified using preamble indices corresponding to the terminals into one or more classes. A multi-user packet, which utilizes the preamble indices to activate only a class of the terminals for processing the multi-user packet, is generated.
摘要:
An approach is provided for specifying channel state information in a multi-carrier communication system. A determination of either spectral locations of a first carrier and a second carrier, or correlation between the first carrier and the second carrier is made. A report format among a plurality of report formats is selected based on either the determined correlation or spectral locations. Each of the report formats specifies channel state information for the first carrier and the second carrier. The channel state information includes data rate information.
摘要:
An approach is provided for addressing in a multiple carrier communication system. In one embodiment, a group index is assigned to a group of terminals of a communication network. The group index permits sharing of addressing indices supported by the communication network for transmission of data to the group of terminals. In another embodiment, a plurality of terminals is classified using preamble indices corresponding to the terminals into one or more classes. A multi-user packet, which utilizes the preamble indices to activate only a class of the terminals for processing the multi-user packet, is generated.
摘要:
An approach is provided for adaptively adjusting a threshold relating to a loading condition of a communication link. The threshold (e.g., rise over thermal (ROT) threshold) is adaptively adjusted the threshold based on an overshoot rate parameter that specifies number of times a target rate is exceeded and based on number of occurrences of an overshoot event.