# US 2013/0155844 A1 · Protection switching method, system and a node in an lte network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155844 A1 - Document ID: US20130155844A1 - Status: Published application - Kind: A1 - Application number: 13/721,197 - Filed: 2012-12-20 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Tejas Networks Limited - Inventors: Vinod Kumar MADAIAH - Web page: https://patentgrep.com/patent/US20130155844A1 ## CPC - H04L 45/28: using route fault recovery - H01Q 1/246: {specially adapted for base stations} - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H04W 16/28: using beam steering - H04W 92/20: between access points - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present invention relates to a protection switching method, system and a node in an LTE network. In one embodiment this is accomplished by a plurality of base transceiver station (BTS) linked by the network over which the base transceiver stations communicate, wherein the network includes at least one primary BTS and at least two secondary BTS, and wherein each BTS includes at least two bidirectional antennas, provisioning traffic to at least one secondary BTS as work BTS for backhauling the traffic, wherein the traffic includes user data traffic, control and signaling data traffic from the primary BTS, checking periodically for control signal by all the BTS, wherein the control signals are periodically transmitted and received by all the BTS directly or indirectly via another secondary BTS to check the status of wireless link, transparently and steering, upon failure of the work wireless X2 link between the primary BTS and the secondary BTS, the beam of the primary BTS appropriately to the next available BTS as protect BTS, wherein the steering is based on the computed pre-coder vector value at the primary BTS. ## Claims ### Claim 1 A protection switching method in an LTE network, the method comprising: a plurality of base transceiver station (BTS) linked by the network over which the base transceiver stations communicate, wherein the network includes at least one primary BTS and at least two secondary BTS, and wherein each BTS includes at least two bidirectional antennas; provisioning traffic to at least one secondary BTS as work BTS for backhauling the traffic, wherein the traffic includes user data traffic, control and signaling data traffic from the primary BTS; checking periodically for control signal by all the BTS, wherein the control signals are periodically transmitted and received by all the BTS directly or indirectly via another secondary BTS to check the status of wireless link, transparently; and steering, upon failure of the work wireless X2 link between the primary BTS and the secondary BTS, the beam of the primary BTS appropriately to the next available BTS as protect BTS, wherein the steering is based on the computed pre-coder vector value at the primary BTS. ### Claim 2 (depends on 1) The method of claim 1, further comprising: exchanging the role of work BTS and protect BTS upon successful steering of the beam, wherein the steering the beam of transmission to the next available BTS is accomplished by without mechanical rotation of the antennas. ### Claim 3 (depends on 1) The method of claim 1, further comprising down-linking user traffic towards a user equipment append to the primary BTS is from the work BTS to the primary BTS over X2 interface in the first communication area using a first frequency band; and up-linking the user traffic from the user equipment append to the primary BTS using wireless X2 channel from primary BTS to work BTS in the first communication area using second frequency band, wherein the first frequency and the second frequency of the first communication area are same for a TDD mode. ### Claim 4 (depends on 3) The method of claim 3, wherein the uplink and downlink mechanism over the wireless channel is Time Division Duplex (TDD) Mode and the ratio of uplink and downlink user data rate is n:0 or 0:n. ### Claim 5 (depends on 3) The method of claim 3, wherein the uplink and downlink mechanism over the wireless channel is Time Division Duplex (TDD) Mode and the ratio of uplink and downlink throughput data rate is n:0 or 0:n. ### Claim 6 (depends on 1) The method of claim 1, wherein the control signals are periodically exchanged between the secondary BTSes via X2 interface. ### Claim 7 (depends on 1) The method of claim 1, wherein the control signals are periodically exchanged between the primary BTS and the work BTS via X2 interface. ### Claim 8 (depends on 1) The method of claim 1, wherein the control signals are periodically exchanged between the primary BTS and the protect BTS over non-congruent reverse path in an access communication network, and wherein the access communication network includes BTSs, UEs and wireless channel. ### Claim 9 (depends on 7) The method of claim 7, wherein the control signals from protect BTS to primary BTS is directly over wireless X2 channel and from primary BTS to protect BTS is via work BTS over plurality of X2 interface ### Claim 10 (depends on 1) The method of claim 1, wherein the primary BTS is operated in a TDD Mode, wherein at least one receiver is used for down-linking user traffic and control traffic from work BTS and at least one receiver is used for down-linking control traffic from protect BTS and at least one transmitter is used for up-linking user traffic and control traffic from primary BTS to work BTS. ### Claim 11 (depends on 1) The method of claim 1, wherein the precoding vector value is selected out of a set of precoding schemes depending upon the topology of the BTS. ### Claim 12 An eNodeB or a relay node or a BTS, comprising: at least one antenna attached to the BTS, wherein the antenna includes at least two transmitter to transmit a beam signal and a plurality of receiver to receive a plurality of beam signal in a communication network; a processor including a memory; and a control unit communicatively coupled the processor, wherein the control circuit is configured for switching the traffic in a network, wherein the configuration includes: communicating with a plurality of base transceiver station (BTS) linked by a communication network over which the base transceiver stations communicate, wherein the network includes at least one primary BTS and at least two secondary BTS, and wherein each BTS includes at least two bidirectional antennas; provisioning traffic to at least one secondary BTS as work BTS for backhauling the traffic, wherein the traffic includes user data traffic, control and signaling data traffic from the primary BTS; checking periodically for control signal by all the BTS, wherein the control signals are periodically transmitted and received by all the BTS directly or indirectly via another secondary BTS to check the status of wireless link, transparently; and steering, upon failure of the work wireless X2 link between the primary BTS and the secondary BTS, the beam of the transmission by the primary BTS to the next available BTS as protect BTS, wherein the steering is based on the computed pre-coder vector value at the primary BTS. ### Claim 13 (depends on 12) The eNodeB or a relay node or a BTS of claim 12, wherein the control circuit is further configures for: down-linking user traffic towards a user equipment append to the primary BTS is from the work BTS to the primary BTS over X2 interface in the first communication area using a first frequency band; and up-linking the user traffic from the user equipment append to the primary BTS using wireless X2 channel from primary BTS to work BTS in the first communication area using second frequency band, wherein the uplink and downlink mechanism over the wireless channel is Time Division Duplex (TDD) Mode and the ratio of uplink and downlink user data rate is n:0 or 0:n, and wherein the uplink and downlink mechanism over the wireless channel is Time Division Duplex (TDD) Mode and the ratio of uplink and downlink throughput data rate is n:0 or 0:n. ### Claim 14 (depends on 12) The enodeB or a relay node or a BTS of claim 12, wherein steering the beam of transmission to the next available BTS is accomplished by without mechanical rotation of the antennas. ### Claim 15 (depends on 12) The eNodeB or a relay node or a BTS of claim 12, wherein the communications network is at least one of the following: a 3rd Generation mobile communications system, a 4th Generation mobile communications system, a 3rd Generation Partnership Project Long Term Evolution mobile communications system.