A user data constraint establishes a requirement that the constrained requests be received over a protected transport layer connection.

用户数据约束(user data constraint)满足了受限的请求应该经由受防护的传输层链接进行传输的需求。

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Also an adaptive TFC allocation algorithm is given to minimize total transmitting power with the constraint of the minimal data rate requirement of each accessed user.

同时给出了针对这种系统的一种自适应TFC分配算法，该算法在保证每个用户的最小传输速率请求的前提下，使传输功率最小化。

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