Systems and methods of pre-allocating identifiers to wireless devices for use in requesting resources over a random access channel are described. A wireless communication system includes a random access channel over which wireless devices can anonymously send requests for resources. The base stations receiving and processing the anonymous requests reduces the probability of random access channel collisions and conserves the resources needed to support the anonymous requests by pre-allocating one or more identifiers to select wireless devices. The wireless devices having the pre-allocated codes can transmit a particular code over the random access channel as a request for resources that uniquely identifies the requester.

Claims

48 · 6 independent · depth 3

48 granted claims

›1.independentA method of handover of a mobile station to a target base station, the method comprising:ntransmitting, from the target base station, an indication of…+7

›2.↳ 1The method of claim 1, wherein the non-contention reserved access identifier is released after synchronization of the mobile station with the target b…d2

›3.↳ 1The method of claim 1, wherein the feedback message further comprises at least one of a power adjustment or a frequency offset.d2

›4.↳ 1The method of claim 1, wherein the plurality of access identifiers are code division multiple access (CDMA) codes.d2

›5.↳ 1The method of claim 1, wherein the shared random access channel comprises time and frequency resources within an uplink communication channel.d2

›6.↳ 1The method of claim 1, wherein the shared random access channel includes a number of OFDM subcarriers, symbols, or a combination of OFDM subcarriers a…d2

›7.↳ 1The method of claim 1, wherein the reserved set of access identifiers includes a further non-contention access identifier usable for bandwidth request…d2

›8.↳ 1The method of claim 1, further comprising:ndetermining if the mobile station is capable of using non-contention access identifiers.d2

›9.independentA base station, comprising:na processor;a transceiver; anda memory capable of storing a non-transitory computer readable instruction, the non-transito…+5

›15.independentA method of handover of a mobile station to a target base station, the method comprising, at the target base station:nindicating a reserved set of acc…+7

›16.↳ 15The method of claim 15, wherein the conveying, to the mobile station, the indication of the non-contention reserved access identifier from the reserve…d2

›17.↳ 15The method of claim 15, wherein the feedback message further comprises at least one of a power adjustment or a frequency offset.d2

›18.↳ 15The method of claim 15, wherein the plurality of access identifiers are code division multiple access (CDMA) codes.d2

›19.↳ 15The method of claim 15, wherein the shared random access channel includes a number of OFDM subcarriers, symbols, or a combination of OFDM subcarriers …d2

›20.↳ 15The method of claim 15, wherein the non-contention reserved access identifier is released after synchronization of the mobile station with the target …d2

›21.↳ 15The method of claim 15, wherein the shared random access channel comprises time and frequency resources within an uplink communication channel.d2

›22.↳ 15The method of claim 15, wherein the reserved set of access identifiers includes a further non-contention access identifier usable for bandwidth reques…d2

›23.independentA base station comprising:na processor;a transceiver; anda memory capable of storing a non-transitory computer readable instructions, the non-transito…+7

›24.↳ 23The base station of claim 23, wherein the non-transitory computer readable instructions cause the processor to convey, to the mobile station, the indi…d2

›25.↳ 23The base station of claim 23, wherein the feedback message further comprises at least one of a power adjustment or a frequency offset.d2

›26.↳ 23The base station of claim 23, wherein the plurality of access identifiers are code division multiple access (CDMA) codes.d2

›27.↳ 23The base station of claim 23, wherein the shared random access channel includes a number of OFDM subcarriers, symbols, or a combination of OFDM subcar…d2

›28.↳ 23The base station of claim 23, wherein the non-contention reserved access identifier is released after synchronization of the mobile station with the b…d2

›29.↳ 23The base station of claim 23, wherein the shared random access channel comprises time and frequency resources within an uplink communication channel.d2

›30.↳ 23The base station of claim 23, wherein the reserved set of access identifiers includes a further non-contention access identifier usable for bandwidth …d2

›31.independentA method for use in a base station, the method comprising:nindicating a first reserved set of access identifiers from a plurality of access identifier…+8

›32.↳ 31The method of claim 31, further comprising:nforwarding, to the mobile station, during a handover of the mobile station to a second base station, an in…d2+1

›34.↳ 31The method of claim 31, wherein the feedback message further comprises at least one of a power adjustment or a frequency offset.d2

›35.↳ 31The method of claim 31, wherein the plurality of access identifiers are code division multiple access (CDMA) codes.d2

›36.↳ 31The method of claim 31, wherein the shared random access channel includes a number of OFDM subcarriers, symbols, or a combination of OFDM subcarriers …d2

›37.↳ 31The method of claim 31, wherein the first access identifier is released after synchronization of the mobile station with the base station.d2

›38.↳ 31The method of claim 31, wherein the shared random access channel comprises time and frequency resources within an uplink communication channel.d2

›39.↳ 31The method of claim 31, wherein the first reserved set of access identifiers includes a further non-contention access identifier usable for bandwidth …d2

›40.independentA base station comprising:na processor;a transceiver; anda memory capable of storing a non-transitory computer readable instructions, the non-transito…+8

›41.↳ 40The base station of claim 40, wherein the non-transitory computer readable instructions further cause the processor to forward to the mobile station, …d2+1

›43.↳ 40The base station of claim 40, wherein the feedback message further comprises at least one of a power adjustment or a frequency offset.d2

›44.↳ 40The base station of claim 40, wherein the plurality of access identifiers are code division multiple access (CDMA) codes.d2

›45.↳ 40The base station of claim 40, wherein the shared random access channel includes a number of OFDM subcarriers, symbols, or a combination of OFDM subcar…d2

›46.↳ 40The base station of claim 40, wherein the first access identifier is released after synchronization of the mobile station with the base station.d2

›47.↳ 40The base station of claim 40, wherein the shared random access channel comprises time and frequency resources within an uplink communication channel.d2

›48.↳ 40The base station of claim 40, wherein the first reserved set of access identifiers includes a further non-contention access identifier usable for band…d2

Classifications

1 codes

IPC · International Patent Classification

Section H — Electricity

H04W74/08

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Pendency

2.4 y

880 days filing → grant

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non-final + final

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Chuong M Nguyen

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Type	Document	Date
related publication	US 20130315145 A1	28 Nov 2013

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