Method and apparatus for data security and automatic repeat request implementation in a wireless communication system

摘要

A method and apparatus for implementing data security and automatic repeat request (ARQ) in a wireless communication system are disclosed. Cipher entities are included in a wireless transmit/receive unit (WTRU) and an access gateway (aGW), and outer ARQ, (or radio link control (RLC)), entities are included in the WTRU and an evolved Node-B (eNode-B). Each cipher entity is located on top of an outer ARQ entity. The cipher entities cipher and decipher a data block by using a generic sequence number (SN) assigned to the data block. The outer ARQ entities may segment the ciphered data block to multiple packet data units (PDUs), may concatenate multiple ciphered data blocks to a PDU, or may generate one PDU from one data block. The outer ARQ entities may segment or re-segment the PDU when a transmission failure occurs.

主权项

1. A wireless transmit/receive unit (WTRU) for implementing data security and automatic repeat request (ARQ), the WTRU comprising:
a cipher entity configured to assign a generic sequence number (SN) to an uplink data block in a layer above a radio link control (RLC) layer; the cipher entity configured to cipher the uplink data block for transmission using the generic SN, a ciphering key, and a bearer identity in the layer above the RLC layer; and an outer automatic repeat request (ARQ) entity configured to perform an ARQ operation using an ARQ SN of the ciphered uplink data block, wherein the ARQ operation is performed with an ARQ function located at an evolved NodeB (eNB).