PCS系統(tǒng)中，用戶(hù)漫游到非歸屬VLR覆蓋區(qū)被呼時(shí)，系統(tǒng)將產(chǎn)生大量信令開(kāi)銷(xiāo)和數(shù)據(jù)庫(kù)訪(fǎng)問(wèn)開(kāi)銷(xiāo)。該文為移動(dòng)用戶(hù)被呼提出了一種改進(jìn)的緩沖呼叫算法來(lái)降低網(wǎng)絡(luò)信令開(kāi)銷(xiāo)與數(shù)據(jù)庫(kù)訪(fǎng)問(wèn)負(fù)荷和呼叫建立時(shí)延，建立了一種模型來(lái)分析其相關(guān)性能。與傳統(tǒng)呼叫算法相比，改進(jìn)呼叫算法能極大降低系統(tǒng)開(kāi)銷(xiāo)，具有較強(qiáng)的可行性。

When deliver incoming calls to users visiting their nonresident Visitor Location Register (VLR) coverage, Personal Communication Service(PCS) networks will create significant signaling and database access load. In this paper, we propose an improved cache scheme to reduce signaling cost, delivery delay and access load during calls setup. An analytical model is applied to formulate the cost of the improved scheme. Our study indicates that the proposed scheme can significantly reduce the network costs compared with the traditional call setup approach.