Abstract: Method and apparatus employing transparent session initiation protocol (SIP) technique for communication especially between a user device in one domain and an application/service provide in an external domain. The transparent SIP technique is usable in wired or wireless systems such as 3G systems and wireless local area networks (WLANs).

Abstract: A method and apparatus are disclosed for selectively regulating devices. In a wireless communication system, a regulation zone is defined. Devices within a regulation zone (e.g. an electronic do-not-disturb (EDND) zone) are regulated by generating and transmitting inhibiting signals into or near the regulation zone. The inhibiting signals may be messages instructing devices to disable one or more of their sensing components or actual interference signals that prevent sensing components from functioning properly or watermarks that mark illicit recordings so that such illicit recordings are precluded from being transmitted over the network.

Abstract: Tokens/keys are produced for wireless communications. These tokens/keys are used for watermarks, signature insertion, encryption and other uses. In one embodiment, contextual information is used to generate tokens/keys. The tokens/keys may be derived directly from the contextual information. The contextual information may be used in conjunction with other information to derive the tokens/keys. Tokens/keys may be exchanged between transmit/receive units. The exchange of these tokens/keys may be encrypted.