d the allocation information once at the beginning of a talk spurt, and avoid sending different allocation information for each subsequent packet. Significant resources that would otherwise be occupied by unnecessary control signals can be used to accommodate VoIP packets from other users. Because VoIP packets are usually small in size, the savings from reduced overhead can significantly increase the overall system capacity. The capacity gain from persistent scheduling; however, can be compromised significantly due to dynamic link adaptation, which is a very common technique in wireless systems to adapt to dynamic variation in wireless channel quality. The baseline concept of persistent and dynamic scheduling is illustrated in Figure 10-10. The DL Persistent Allocation A-MAP IE is used to persistently allocate resources to a user in the downlink. It can also be used to de-allocate persistently allocated resources. Table 10-10 shows the parameters and their corresponding values in the DL persistent allocation information element. The UL Persistent Allocation A-MAP IE is used to persistently allocate resources to a user in the uplink. It can further be used to de-allocate persistently allocated resources. Table 10-11 shows the parameters and their corresponding values in the DL persistent allocation information element. 10.2 Downlink control channels Control Signaling (Resource Allocation) for Persistent Allocation Frame k Frame k+1 Frame k+2 Frame k+3 User Persistent Allocations Control Signaling (Resource Allocation) for Dynamic Allocation Frame k Frame k+1 Frame k+2 Frame k+3 Allocations FIGURE 10-10 A comparison between persistent and dynamic allocation concepts The Group Resource Allocation A-MAP IE is used to allocate resources to one or multiple mobile stations within a user group. The Group Resource Allocation A-MAP IE is used for signaling group resource allocation in the downlink or uplink. Group scheduling requires assignment of a service flow of an MS to a group. In order to add a flow of an MS to a gro