Broadcast/broadband convergence network

Patent metadata

Field	Value
Publication number	US-10567971-B2
Application number	US-201414456817-A
Country	US
Kind code	B2
Filing date	Aug 11, 2014
Priority date	Aug 11, 2013
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A broadcast/broadband convergence system that delivers content from content sources to user equipment devices. The system provides: significantly enhanced mobile capability to the broadcast industry; an additional revenue source for the broadcast industry by dynamically selling available spectral resources for use by wireless broadband networks and/or broadcast content off-loaded from wireless broadband networks; additional spectrum for the broadband industry through the dynamic purchase of available spectrum; and an enriched user experience. A spectrum server may facilitate the dynamic allocation of radio spectrum made available by the broadcast networks. The broadcast networks may broadcast with enhanced waveform parameters to support mobile devices as well as fixed devices.

First claim

What is claimed is:

1. A spectrum server for allocating available broadcast spectrum resources under carrier aggregation, the spectrum server comprising:
one or more processors, and
a memory storing program instructions that when executed by the one or more processors, cause the one or more processors to perform operations including:
querying a broadcast exchange server representing one or more broadcast networks for information indicative of available broadcast spectrum;
in response to said querying, receiving the information indicative of the available broadcast spectrum from the broadcast exchange server, wherein, for each of a plurality of frequency bands in a regulatory domain, the information indicates available or non-available status of each channel in a set of channels corresponding to the frequency band;
combining a contiguous group of the channels that are of available status, to form a contiguous band;
assigning a contiguous portion of the contiguous band to a wireless broadband network in response to a request from an entity representing the wireless broadband network, wherein said assigned contiguous portion is defined by an interval of resource block numbers, wherein the resource block numbers correspond to a partition of the contiguous band into resource blocks of fixed width, wherein the resource block numbers are consecutively numbered, in order of frequency; and
transmitting a message to the entity representing the wireless broadband network, wherein the message identifies the interval of resource block numbers by its endpoints, wherein the message also indicates a period of time that said contiguous portion is assigned.

2. The spectrum server of claim 1 , wherein the resource blocks of said partition are distributed symmetrically with respect to a center of the contiguous band.

3. The spectrum server of claim 1 , wherein the information also indicates a time period over which the one or more broadcast networks have agreed not to transmit on said available broadcast spectrum.

4. The spectrum server of claim 1 , wherein the information also indicates a time period over which the one or more broadcast networks have agreed to not transmit using said available broadcast spectrum in some geographical region.

5. The spectrum server of claim 1 , wherein said one or more broadcast networks include a television broadcast network.

6. The spectrum server of claim 5 , wherein said wireless broadband network is a Long Term Evolution (LTE) network.

7. The spectrum server of claim 1 , wherein, in response to determining that a number of the resource blocks included in the contiguous portion is odd, the one or more processors are configured to insert a half-subcarrier shift of the resource blocks included in the contiguous portion, wherein said insertion avoids signal power being allocated to a DC subcarrier when the wireless broadband network generates a downlink signal based on said contiguous portion.

8. The spectrum server of claim 1 , wherein the resource blocks of said partition exclude edge portions of the contiguous band, to avoid interference with transmissions on other bands of radio spectrum.

9. The spectrum server of claim 1 , wherein the program instructions, when executed by the one or more processors, cause the one or more processors to store a list of the channels that are of available status, wherein, for each of the available channels, the list includes a period of time over which a corresponding one of the one or more broadcast networks agrees not to use the available channel.

10. The spectrum server of claim 1 , wherein the program instructions, when executed by the one or more processors, cause the one or more processors to receive a message relating to a payment for use of the contiguous portion, wherein the message is received from said entity representing the wireless broadband network.

11. The spectrum server of claim 1 , wherein the entity is a base station, wherein the program instructions, when executed by the one or more processors, cause the one or more processors to determine a level of carrier aggregation (CA) support of the base station, wherein said determining is performed in response to registration of the base station with the spectrum server.

12. The spectrum server of claim 1 , wherein the program instructions, when executed by the one or more processors, cause the one or more processors to allocate resource blocks corresponding to the contiguous portion on either side of a center of the contiguous band, to avoid the possibility of signal power in a DC subcarrier.

13. The spectrum server of claim 1 ,
wherein the set of channels corresponding to a first of the frequency bands has a different number of channels than the set of channels corresponding to a second of the frequency bands,
wherein the resource blocks of said partition of the contiguous band are distributed symmetrically with respect to a center of the contiguous band,
wherein the program instructions, when executed by the one or more processors, cause the one or more processors to assign a second portion of the contiguous band to a second wireless broadband network, wherein the second wireless broadband network belongs to a different wireless carrier than said wireless broadband network.

14. A base station for operation as part of a wireless broadband network, enabling dynamic aggregation of spectrum resources, the base station comprising:
circuitry configured to wirelessly transmit a downlink signal to one or more devices using aggregated spectrum resources including a portion of broadband spectrum and a contiguous portion of broadcast spectrum;
wherein the contiguous portion of broadcast spectrum has been made available by one or more broadcast networks and dynamically assigned to the wireless broadband network by a spectrum server in response to a query of a broadcast exchange server representing the one or more broadcast networks by the spectrum server and based on information that is indicative of available broadcast spectrum received from the broadcast exchange server,
wherein, for each of a plurality of frequency bands in a regulatory domain, the information indicates available or non-available status of each channel in a set of channels corresponding to the frequency band,
wherein the contiguous portion has been assigned by the spectrum server from a contiguous band, which has been formed, by the spectrum server, from a contiguous group of channels of available status,
wherein the contiguous portion of the contiguous band is specified by the spectrum server as an interval of resource block numbers according to a partition of the contiguous band into resource blocks of fixed width;
wherein the resource block numbers are consecutively numbered, in order of frequency,
wherein the circuitry is configured to receive a message from the spectrum server, wherein the message identifies the interval by its endpoints, wherein the message also indicates a period of time that said contiguous portion is assigned.

15. The base station of claim 14 , wherein, if a number of resource blocks defining said contiguous portion is odd, said circuitry is configured to insert a half-subcarrier shift of those one or more resource blocks defining said contiguous portion, wherein said insertion avoids signal power being allocated to a DC subcarrier.

16. The base station of claim 14 , wherein the resource blocks of said partition of the contiguous band exclude edge portions of the contiguous band, to avoid interference with transmissions on other bands of radio spectrum.

17. The base stati

Assignees

• Coherent Logix Inc

Inventors

• Eng Tommy K
• Shelby Kevin A

Classifications

• H04H20/423

  Transmitter side · CPC title

• H04L5/001 Primary

  the frequencies being arranged in component carriers · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W4/06

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title