US 9,814,041 B2
Communication mode switching method and device
Yan Xu, Guangdong (CN); Chia Han Siong Samuel, Guangdong (CN); Yingzhe Zhang, Guangdong (CN); and Zhenghua Luo, Guangdong (CN)
Assigned to Hytera Communications Corp., Ltd., Shenzhen, Guangdong (CN)
Appl. No. 14/908,090
Filed by Hytera Communications Corp., Ltd., Shenzhen, Guangdong (CN)
PCT Filed Jul. 24, 2014, PCT No. PCT/CN2014/082925
§ 371(c)(1), (2) Date Jan. 27, 2016,
PCT Pub. No. WO2015/014235, PCT Pub. Date Feb. 5, 2015.
Claims priority of application No. 2013 1 0324070 (CN), filed on Jul. 29, 2013.
Prior Publication US 2016/0165599 A1, Jun. 9, 2016
Int. Cl. H04W 72/04 (2009.01); H04W 24/04 (2009.01); H04W 88/04 (2009.01); H04B 7/14 (2006.01); H04L 5/00 (2006.01); H04W 74/00 (2009.01)
CPC H04W 72/0446 (2013.01) [H04B 7/14 (2013.01); H04L 5/006 (2013.01); H04W 24/04 (2013.01); H04W 72/042 (2013.01); H04W 74/002 (2013.01); H04W 88/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A communication mode switching method, comprising:
receiving a transmission request;
detecting whether radio frequency signal strength of a downlink channel meets a first threshold; and
determining that a relay station is in an operating state, and keeping a mobile station in a relay mode to complete a transmission request, in a case that the radio frequency signal strength of the downlink channel is greater than or equal to the first threshold, wherein in the relay mode, a transmission is performed in a transmitting frequency of an uplink channel; and
determining that the relay station is in an abnormal state and switching the mobile station into an offline mode to complete the transmission request, in a case that the radio frequency signal strength of the downlink channel is less than the first threshold, wherein in the offline mode, the transmitting frequency is adjusted to a receiving frequency of the downlink channel to perform the transmission.