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Frequency hopping in license-exempt/shared bands

An authorization-free, frequency-hopping technology, applied in the field of frequency hopping, can solve problems such as coordination impossibility

Inactive Publication Date: 2014-06-18
BROADCOM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But still some solution is needed for minimizing the interference between the LTEeNB and its equipment transmissions and any cellular devices in the unlicensed band, despite the fact that coordination with non-cellular systems on this unlicensed band may not be possible of

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  • Frequency hopping in license-exempt/shared bands
  • Frequency hopping in license-exempt/shared bands
  • Frequency hopping in license-exempt/shared bands

Examples

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Embodiment Construction

[0069] Unlike the isolated component carriers and CSMA / CA techniques noted in the Background section above, embodiments of these teachings mitigate interference through frequency hopping. Of course frequency hopping can be used in addition to CC isolation and / or CSMA / CA. The following examples are in the non-limiting context of an LTE system, and as will be detailed therein, LTE transmissions use frequency flexibility to minimize interference to WiFi systems co-existing on license-exempt bands. The parameters of this transmission can be optimized based on measurements of coexisting WiFi systems.

[0070] Frequency hopping has been used in GSM systems on cellular frequency bands, including related concepts such as Dynamic Channel Allocation (DCA) with FH mode adaptation and dynamic frequency hopping, where slow FH is used and the utilized channel is modified based on fast frequency quality measurements. (For example, see FUNDAMENTALSOFDYNAMICFREQUENCYHOPPINGINCELLULARSYSTEMS p...

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Abstract

RRC signaling is used to configure a user device for N secondary cells SCells on license-exempt channels w; in a frequency hopping channel set W={wi} where i=1,2,...N. Then cross-carrier scheduling is sent on a primary cell PCell to schedule a frequency hopping FH resource block hi on the ith license-exempt channel wi. Based on measurements of at least some of the license-exempt channels wi received from at least the user device, parameters for the frequency hopping are adapted. The FH resource block contains M physical resource blocks, scheduled for the SCell during a FH time interval Tu*L+j by a resource grant sent on a PDCCH of the PCell. In an embodiment the RRC signaling is sent by a micro access node / HeNB on the PCell, the cross carrier scheduling is sent also by the micro access node / HeNB on the PCell, and the PCell lies within an LTE licensed frequency band.

Description

technical field [0001] Embodiments generally relate to wireless communication systems, methods, devices and computer programs and more particularly to frequency hopping in unlicensed radio spectrum / bands. Background technique [0002] The following abbreviations that may be found in the specification and / or drawings are defined as follows: [0003] 3GPP Third Generation Partnership Project [0004] access point [0005] BCCH broadcast channel [0006] CA Carrier Aggregation [0007] CC component carrier [0008] CQI channel quality information [0009] DCA dynamic channel allocation [0010] DCH dynamic frequency hopping [0011] DL downlink [0012] E-UTRAN Evolved Universal Terrestrial Radio Access Network [0013] FH frequency hopping [0014] HARQ hybrid automatic repeat request [0015] HeNB Home eNB [0016] IEEE Institute of Electronics and Electrical Engineers [0017] ISM Industry, Science, Medicine [0018] L1 layer 1 [0019] LTE Long Term Evolution...

Claims

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Application Information

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IPC IPC(8): H04B1/7143H04B1/715H04W16/14H04L5/00
CPCH04W72/1263H04W16/14H04B1/715H04L5/0012H04B1/7143
Inventor G·沙比特陈滔
Owner BROADCOM CORP
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