In-synchronization and out-of-synchronization detection method

Abstract

The invention provides an in-synchronization and out-of-synchronization detection method, which detects downlink in-synchronization and out-of-synchronization by using a high-speed shared control channel (HS-SCCH), an enhanced-absolute grant channel (E-AGCH), a high-speed physical downlink shared channel (HS-PDSCH) and an enhanced hybrid indicator channel (E-HICH) in the downlink channels for a transmission / scheduling mode in an HSPA+ and detects the downlink in-synchronization and out-of-synchronization by using an enhanced physical uplink channel (E-PUCH) and a high-speed shared informationchannel (HS-SICH) in uplink channels or by a stand alone midamble channel. Thus, when user equipment (UE) temporarily has no data block transmission with cyclic redundancy check (CRC) in the uplink / downlink direction, the corresponding in-synchronization and out-of-synchronization detection can be completed by using the E-HICH, E-PUCH and HS-SICH or the stand alone midamble channel, and the accuracy of the in-synchronization and out-of-synchronization detection on a wireless link of the UE is improved.

Description

technical field [0001] The invention relates to signal detection technology, in particular to a detection method for synchronous and out-of-synchronous when there is no accompanying channel. Background technique [0002] In the TD-SCDMA system, when performing high-speed downlink / uplink data services (HSPDA / HSUPA) transmission, uplink / downlink accompanying dedicated physical channels (DPCH) are configured to assist uplink / downlink synchronization and out-of-synchronization detection. Synchronization detection is called In-Sync, and out-of-sync detection is called Out-of-sync. The physical layer of the receiving end regularly uses the CPHY-Sync-IND primitive to report In-sync to the upper layer or uses the CPHY-Out-of-Sync-IND primitive to report Out-of-sync to the higher layer. When several Out-of- After sync, the receiving end considers that the wireless link has failed, and notifies the sending end that the wireless link has failed. [0003] In the existing protocol, the...

AI Technical Summary

Problems solved by technology

The UE and the base station (Node B) can only make synchronization / out-of-synchronization judgments based on the rule of whether the transmission block with CRC is correct. In this way, when there is no data block transmission with CRC in the uplink / downlink of a certain UE, it will Satisfies the condition of downlink out-of-sync, that is, within the first 160ms, no transmission module with correct CRC is received. Therefore, according to the above rules, it may lead to misjudgment of downlink wireless link out-of-sync

[0017] It can be seen that when HSPA+ is introduced into the system, the existing synchronization and out-of-synchronization detection methods will no longer be robust, that is, accurate synchronization / out-of-synchronization detection cannot be performed

However, an optimized HSPA+ synchronization and out-of-synchronization detection method has not yet been proposed.