f an MS that transmitted the MOB_MSHO-REQ message detects an incoming MOB_BSHO-REQ message, it will ignore the MOB_BSHO-REQ message. A BS that transmitted a MOB_BSHO- REQ message and detects an incoming MOB_MSHO-REQ or MOB_HO-IND message from the same MS ignores its own previous request. There are several conditions that are required to be met in order to enable fast BS switching between MS and a group of base stations. The base stations involved in FBSS, are required to be synchronized based on a common timing source, the frames sent by the base stations from diversity set arrive at the MS within the OFDM cyclic prefix interval, the base stations involved in FBSS must have synchronized frames and operate at same frequency channel, and the base stations involved in FBSS are also required to share or transfer MS context. The latter includes all information that MS and BS normally exchange during network entry, such as authentication state, such that an MS authenticated and registered with one of the base stations in the Diversity Set is automatically authenticated and registered with other base stations in the same Diversity Set. The context also includes a set of service flows and corresponding mapping to connections associated with the MS, current authentication, and encryption keys associated with the connections. 3. Macro Diversity Handover (MDHO): an MDHO process is initiated with a decision for an MS to transmit to and receive from multiple base stations at the same time. An MDHO can start with either a MOB_MSHO-REQ or a MOB_BSHO-REQ message. For an MS and a BS that support MDHO, the MS and the BS maintain a list of BSs that are involved in MDHO with the MS. The list is called the Diversity Set. Among the base stations in the Diversity Set, an Anchor BS is defined. The normal operation where the MS is registered with a single BS is a particular case of MDHO with Diversity Set consisting of a single BS; i.e., the Anchor BS. When operating in MDHO, the MS communicates with all base stations in the Diversity Se