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EURASIP Journal on Wireless Communications and Networking
Figure 1 | EURASIP Journal on Wireless Communications and Networking

Figure 1

From: Class-Based Fair Code Allocation with Delay Guarantees for OVSF-CDMA and VSF-OFCDM in Next-Generation Cellular Networks

Figure 1

Code blocking and reassignment in an OVSF code tree. The filled circle and the crossed circle indicate the assigned and blocked codes, respectively. A free code is indicated by an empty circle. When code is assigned, it blocks the assignment of its all ancestors and descendants, though its descendants are not shown in this figure. To lift the blocking on , code can be freed by assigning to the call of .

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