Abstract
Methods and systems are provided for use with wireless networks having one or more cell in which each cell includes a base station (BS) at least one relay station (RS) and at least one mobile station (MS). The at least one relay station can be used as an intermediate station for providing communication between the BS and MS. Methods are provided for allocating OFDM resources for communicating between the BS RS and/or MS for example dividing transmission resources into uplink and downlink transmissions and methods of inserting pilot symbols into
transmission resources used by the RS. In some embodiments on the invention the methods are consistent and/or can be used in conjunction with existing standards such as 802.16e.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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4G | 11/04/2012 | ISLD-201204-011 | APPLE INC | No | Family Member | ||||
4G | 30/10/2013 | ISLD-201404-001 | APPLE INC | No | Family Member | ||||
4G,3G | 04/11/2015 | ISLD-201511-011 | APPLE INC | No | Family Member | ||||
4G | 27/11/2016 | ISLD-201703-106 | APPLE INC |
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Yes | Basis Patent | |||
4G,3G | 27/11/2016 | ISLD-201703-106 | APPLE INC | Yes | Basis Patent | ||||
4G | 02/11/2017 | ISLD-201801-001 | APPLE INC |
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Yes | Basis Patent | |||
4G,3G | 02/11/2017 | ISLD-201801-001 | APPLE INC | Yes | Basis Patent |
Specification Information
Specification Information
Technologies
Family Information
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Product
Use Cases
Services
Claim
1. A method for use in an orthogonal frequency division multiplexed (OFDM) communication system employing relay stations (RSs) comprising:
assigning a distinct pseudo-random noise (PN) sequence to each base station (BS) and each RS;
storing, in each RS, the distinct PN sequence for the respective RS;
generating, by each RS, a preamble based on the distinct PN sequence for the respective RS; and
transmitting by each RS, a signal to at least one mobile station (MS), the signal including the preamble corresponding to the respective RS.
2. The method of claim 1, further comprising, for purposes of routing, identifying each BS or RS by a BS identification in one of the management messages.
3. The method of claim 2, wherein identifying each RS comprises assigning each RS a base station identifier in the management message.
4. The method of claim 1, wherein assigning a distinct PN sequence for a mobile relay station (MRS) is statically defined even when there is a handoff.
5. The method of claim 4, further comprising defining for MRSs a system reserved PN index so as to avoid collisions when a MS moves across the OFDM communication system.
6. The method of claim 4, wherein the PN index is re-assigned during when a MS moves across the OFDM communication system and further comprising informing any attached MSs of the change and/or performing re-synchronization.
7. The method of claim 1, further comprising:
modifying a management message to include the distinct PN sequence; and
identifying one of the respective RSs based on the management message.
8. A relay station configured to communicate via an orthogonal frequency division multiplexed (OFDM) communication system, comprising:
a memory; and
a processor configured to:
use one pseudo-random noise (PN) sequence from a plurality of PN sequences, wherein the one PN sequence is distinct from PN sequences assigned to other relay stations and base stations in a communication area of the relay station;
store the distinct PN sequence for the relay station in the memory
generate a preamble based on the distinct PN sequence for the relay station; and
transmit a signal to at least one mobile station (MS), the signal including the preamble.
9. The relay station of claim 8, wherein the processor is further configured to, for purposes of routing;
identify each BS or RS by a BS identification in one of the management messages.
10. The relay station of claim 9, wherein identifying each RS comprises assigning each RS a base station identifier in the management message.
11. The relay station of claim 8, wherein assigning a distinct PN sequence for a mobile relay station (MRS) is statically defined even when there is a handoff.
12. The relay station of claim 11, wherein the processor is further configured to; define, for MRSs, a system reserved PN index so as to avoid collisions when a MS moves
across the OFDM communication system.
13. The relay station of claim 11, wherein the PN index is re-assigned during when a MS moves across the OFDM communication system and wherein the processor is further configured to;
inform any attached MSs of the change and/or performing re-synchronization.
14. The relay station of claim 8, wherein the processor is further configured to;
modify a management message to include the distinct PN sequence; and
identify one of the respective RSs based on the management message.
15. A non-transitory computer readable storage medium with an executable program stored thereon that is executable by a processor, the computer readable storage medium and processor being configured to communicate via an orthogonal frequency division multiplexed (OFDM) communication system, wherein the program instructs the processor to:
use one pseudo-random noise (PN) sequence from a plurality of PN sequences, wherein the one PN sequence is distinct from PN sequences assigned to relay stations and base stations in a communication area of the processor;
store the distinct PN sequence for the processor in the memory
generate a preamble based on the distinct PN sequence for the processor; and
transmit a signal to at least one mobile station (MS), the signal including the preamble.
16. The non-transitory computer readable storage medium of claim 15, wherein the processor is further configured to, for purposes of routing;
identify each BS or RS by a BS identification in one of the management messages.
17. The non-transitory computer readable storage medium of claim 16, wherein identifying each RS comprises assigning each RS a base station identifier in the management message.
18. The non-transitory computer readable storage medium of claim 15, wherein assigning a distinct PN sequence for a mobile relay station (MRS) is statically defined even when there is a handoff.
19. The non-transitory computer readable storage medium of claim 18, wherein the processor is further configured to;
define, for MRSs, a system reserved PN index so as to avoid collisions when a MS moves across the OFDM communication system.
20. The non-transitory computer readable storage medium of claim 15, wherein the processor is further configured to;
modify a management message to include the distinct PN sequence; and
identify one of the respective RSs based on the management message.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
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