Communication method and device

The invention relates to a communication method and device. A first cascade data packet is obtained, the first cascade data packet comprises N original data packets, N is an integer greater than or equal to 2, and the first cascade data packet is associated with a first count value. And sending a second cascade data packet, wherein the second cascade data packet is obtained by performing integrity protection and/or encryption on the first cascade data packet. According to the embodiment of the invention, the first cascade data packet can be associated with the first count value, so that the first cascade data packet can have the corresponding count value like the original data packet, and the sending end and the receiving end of the second cascade data packet can sort or retransmit the second cascade data packet according to the first count value. 本申请涉及一种通信方法及装置。获得第一级联数据包，所述第一级联数据包包括N个原始数据包，N为大于或等于2的整数，且所述第一级联数据包关联第一计数值。发送第二级联数据包，所述第二级联数据包是对所述第一级联数据包进行完整性保护和/或加密后得到的。本申请实施例能够为第一级联数据包关联第一计数值，使得第一级联数据包也能像原始数据包一样