Methods and systems for resource allocation in a wireless communication network are disclosed. According to an embodiment, a first portion of a communication resource is allocated by an access node to a first set of access terminals for performing voice communication and a second portion of the communication resource to a second set of access terminals for performing data communication without the statistical characteristics of voice traffic, wherein the allocation is represented by a group message indicated by a first bitmap and a second bitmap, for a group comprising the first set of access terminals and the second set of access terminals, respectively. A terminal in the second set of access terminals can be in an additional group comprising a third set of access terminals configured to perform voice communication through the access node, and a fourth set of access terminals configured to perform data communication without the statistical characteristics of voice traffic.