Control Mechanism for Communication Via Different Frequency Bands

• US 20140376483A1
• Filed: 02/08/2012
• Published: 12/25/2014
• Est. Priority Date: 02/08/2012
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Hong, Wei, Bai, Wei, Han, Jing, Zeng, Erlin, Wang, Haiming, Wei, Na, Gao, Chunyan, Sun, Pengfei
• Granted Patent: US 9,426,664 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/082 among bearers or channels
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

There is provided a mechanism for controlling communications conducted via different frequency bands or communication spectrums. When a communication via a first communication path, for example an unlicensed or white space communication spectrum, is to be established, e.g. for offloading traffic from a second communication path, for example a licensed cellular communication spectrum, a preamble transmission command is generated and transmitted from a communication network control element, such as an eNB, via the second communication path to a communication element, such as a UE. By means of the preamble transmission command, the transmission of a preamble signal by the receiving communication element on the first communication path with predetermined communication resources is triggered. Based on a receipt or non-receipt of the preamble signal via the first communication path, the communication network control element is able to determine that the communication element can establish a connection on the first communication path, for example the unlicensed or white space communication spectrum.

Claims

1. An apparatus comprising

a preamble transmission command processing portion configured to generate a preamble transmission command comprising instruction for causing transmission of a preamble signal on a first communication path, and to cause transmission of the preamble transmission command on a second communication path being different to the first communication path, and

a preamble signal detecting portion configured to detect whether the preamble signal instructed by the preamble transmission command is received via the first communication path.

2. The apparatus according to claim 1, wherein

the first communication path belongs to at least one of an unlicensed communication spectrum or a white-space communication spectrum, and the second communication path belongs to a licensed communication spectrum or working unlicensed spectrum.

3. The apparatus according to claim 1, wherein the preamble transmission command processing portion is further configured to generate the preamble transmission command in the form of one of a control element, a control channel format, or a radio resource control signal.

4. The apparatus according to claim 1, wherein the preamble transmission command processing portion is further configured to introduce in the preamble transmission command information related to predetermined communication resources to be used for transmitting the preamble signal on the first communication path, wherein the information specifies at least one of an identification to be used for the preamble signal, a subframe pattern of the preamble signal, a repetition interval for a transmission of the preamble signal, a power level to be set for transmitting the preamble signal, a frequency offset for the preamble signal, and a component carrier index for the preamble signal.

5. The apparatus according to claim 1, wherein the preamble transmission command processing portion is further configured to introduce in the preamble transmission command an indication for one of an aperiodical signaling of the preamble signal or a periodical signaling of the preamble signal.

6. The apparatus according to claim 1, wherein the preamble signal detecting portion is further configured to detect whether the preamble signal instructed by the preamble transmission command is received via the first communication path within a predetermined period of time after the preamble transmission command is transmitted.

7. The apparatus according to claim 1, wherein the preamble signal detecting portion is further configured, when the preamble signal instructed by the preamble transmission command is received via the first communication path, to determine that a recipient of the preamble transmission command is capable of communicating on the second communication path, and to cause preparing of an activation of a communication connection with the recipient of the preamble transmission command via the first communication path.

8. The apparatus according to claim 1, further comprising

a pathloss calculating portion configured to calculate, on the basis of a preamble signal instructed by the preamble transmission command and received via the first communication path, an uplink pathloss value of a communication, and to cause transmitting of pathloss information to a recipient of the preamble transmission command instructing the received preamble signal, the pathloss information indicating the calculated uplink pathloss.

9. The apparatus according to claim 1, wherein the preamble signal detecting portion is further configured, when the preamble signal instructed by the preamble transmission command is not received, to conduct at least one of

causing the preamble transmission command processing portion to cause re-transmitting of the preamble transmission command, or

causing the preamble transmission command processing portion to generate and transmit a new preamble transmission command for causing transmission of a preamble signal,

wherein the new preamble transmission command comprises information related to predetermined communication resources to be used for transmitting the preamble signal on the first communication path, the predetermined communication resources being different to communication resources to be used for transmitting the preamble signal being not received, or information related to predetermined communication resources to be used for transmitting the preamble signal on a third communication path being different to the first and second communication paths.

10. The apparatus according to claim 1, wherein the apparatus is comprised in a communication network control element, in particular an evolved node B of an LTE or LTE-A based cellular communication network, wherein the preamble transmission command is transmitted to a communication element being controlled by the communication network control element.

11. A method comprising

generating a preamble transmission command comprising instruction for causing transmission of a preamble signal on a first communication path,

transmitting the preamble transmission command on a second communication path being different to the first communication path, and

detecting whether the preamble signal instructed by the preamble transmission command is received via the first communication path.

12. The method according to claim 11, wherein

the first communication path belongs to at least one of an unlicensed communication spectrum or a white-space communication spectrum, and the second communication path belongs to a licensed communication spectrum or working unlicensed spectrum.

14. The method according to claim 11, further comprising

introducing, in the preamble transmission command, information related to predetermined communication resources to be used for transmitting the preamble signal on the first communication path, wherein the information specifies at least one of an identification to be used for the preamble signal, a subframe pattern of the preamble signal, a repetition interval for a transmission of the preamble signal, a power level to be set for transmitting the preamble signal, a frequency offset for the preamble signal, and a component carrier index for the preamble signal.

13. (canceled)

15-20. -20. (canceled)

21. An apparatus comprising

a preamble transmission command receiving portion configured to receive and process a preamble transmission command comprising instruction for causing transmission of a preamble signal on a first communication path, wherein the preamble transmission command is received via a second communication path being different to the first communication path, and

a preamble signal transmitting portion configured to cause transmitting of a preamble signal via the first communication path according to the instruction of the preamble transmission command.

22. The apparatus according to claim 21, wherein

the first communication path belongs to at least one of an unlicensed communication spectrum or a white-space communication spectrum, and the second communication path belongs to a licensed communication spectrum or working unlicensed spectrum.

23. The apparatus according to claim 21, wherein the preamble transmission command receiving portion is further configured to receive the preamble transmission command in the form of one of a control element, a control channel format, or a radio resource control signal.

24. The apparatus according to claim 21, wherein the preamble transmission command receiving portion is further configured to achieve from the preamble transmission command information related to predetermined communication resources to be used for transmitting the preamble signal on the first communication path, wherein the information specifies at least one of an identification to be used for the preamble signal, a subframe pattern of the preamble signal, a repetition interval for a transmission of the preamble signal, a power level to be set for transmitting the preamble signal, a frequency offset for the preamble signal, and a component carrier index for the preamble signal.

25. The apparatus according to claim 21, wherein the preamble transmission command receiving portion is further configured to achieve from the preamble transmission command an indication for one of an aperiodical signaling of the preamble signal or a periodical signaling of the preamble signal, wherein the preamble signal transmitting portion is further configured to transmit the preamble signal aperiodically or periodically according to the indication.

26. The apparatus according to claim 21, further comprising

a pathloss information receiving portion configured to receive and process a pathloss information indicating an uplink pathloss value of a communication via the first communication path, and

a communication portion configured to set a transmission power for a communication via the first communication path on the basis of the received uplink pathloss value.

27. The apparatus according to claim 21, wherein the apparatus is comprised in a communication element located in an LTE or LTE-A based cellular communication network, wherein the preamble transmission command is received from an evolved node B of the LTE or LTE-A based cellular communication network, controlling the communication element.

28-37. -37. (canceled)