US5734646A — Code division multiple access system providing lo…

Claim 1

Independent Claim 174 words

In a code division multiple access system including multiple cells, each cell having a base station and multiple mobile stations, a method of allocating bandwidth to a mobile station comprising the steps of: receiving, at a base station of a first cell, a data burst request from an active mobile station of said first cell requesting a first data rate in excess of the basic data rate (B) allocated to that mobile station, said data burst request including pilot strength information for the base station of said first cell and a base station of at least one cell adjacent to said first cell; at an access controller, using the received pilot strength information to determine an increased data rate which is to be granted to said requesting mobile station without causing excessive interference at said first cell and said at least one adjacent cell; and transmitting a data burst assignment response from the access controller to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 2

Dependent Claim 174 words

In a code division multiple access system including multiple cells, each cell having a base station and multiple mobile stations, a method of allocating bandwidth to a mobile station comprising the steps of: receiving, at a base station of a first cell, a data burst request from an active mobile station of said first cell requesting a first data rate in excess of the basic data rate (B) allocated to that mobile station, said data burst request including pilot strength information for the base station of said first cell and a base station of at least one cell adjacent to said first cell; at an access controller, using the received pilot strength information to determine an increased data rate which is to be granted to said requesting mobile station without causing excessive interference at said first cell and said at least one adjacent cell; and transmitting a data burst assignment response from the access controller to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 3

Dependent Claim 43 words

The method of claim 1 wherein the access controller compares the received pilot strength information with a threshold and wherein the increased data rate is assigned to said requesting mobile station when the received pilot strengths have a predetermined relationship to that threshold.

Claim 4

Dependent Claim 61 words

The method of claim 2 wherein the pilot strength information is provided for base stations at a plurality of cells adjacent said first cell and wherein the first data rate is granted when the received pilot strength from any of the base stations at the plurality of adjacent cells, as reported by said requesting mobile station, does not exceed the threshold.

Claim 5

Dependent Claim 33 words

The method of claim 2 wherein the threshold is a high rate access threshold (T hra ) that is lower than soft handoff add (T add ) and drop (T drop ) thresholds.

Claim 6

Dependent Claim 33 words

The method of claim 2 wherein the threshold is a high rate access threshold (T hra ) that has a predetermined relationship with add (T add ) and drop (T drop ) thresholds.

Claim 7

Dependent Claim 64 words

The method of claim 2 further including the step of: transmitting a data burst assignment response to said requesting mobile station when any received pilot strength information is above the threshold, the data burst assignment response enabling a data transmission rate at the requesting mobile station which is lower than a data rate permitted when the received pilot strength information is below the threshold.

Claim 8

Dependent Claim 28 words

The method of claim 2 wherein the data burst assignment response indicates that the first data rate is denied when the pilot strength information is above the threshold.

Claim 9

Dependent Claim 40 words

The method of claim 1 wherein the burst request includes data burst length information and wherein the data burst assignment response includes a data burst length parameter specifying a permitted length of a data burst to the requesting mobile station.

Claim 10

Dependent Claim 37 words

The method of claim 4 wherein said base station includes the step of determining if the requested burst length information is to be permitted and, when permitted, including a permitted-data-burst-length parameter in the data burst assignment response.

Claim 11

Dependent Claim 29 words

The method of claim 1 wherein the data burst assignment response includes retry delay information indicating that the requesting mobile station should retry its request at a later time.

Claim 12

Dependent Claim 32 words

The method of claim 1 wherein the data burst assignment response includes start-delay information indicating that the requesting mobile station should delay its transmission for a time derived from the start-delay information.

Claim 13

Dependent Claim 57 words

The method of claim 1 further including the steps of checking a list of scheduled data bursts at the base station and wherein the data burst assignment response includes a retry later message when the list is longer than a predetermined length and a data burst permission message when the list is shorter than the predetermined length.

Claim 14

Dependent Claim 21 words

The method of claim 1 wherein the access controller is located at one or more base stations including the first cell.

Claim 15

Dependent Claim 16 words

The method of claim 1 wherein the access controller is located apart from any base station.

Claim 16

Dependent Claim 51 words

The method of claim 1 wherein a set of thresholds are associated with multiple data burst rates, and wherein the access controller compares received pilot strengths from said at least one adjacent cell with the set of thresholds to determine a data rate to be granted to said requesting mobile station.

Claim 17

Dependent Claim 56 words

The method of claim 15 wherein the set of thresholds, each having a data burst rate associated therewith, and wherein the access controller compares the maximum of the received pilot strengths from said at least one adjacent cell with the set of thresholds to determine a data rate to be granted to the requesting mobile station.

Claim 18

Dependent Claim 104 words

The method of claim 1 further comprising the steps of: receiving, at the access controller, a neighbor load update message indicating load measure information at said at least one adjacent cell; at the access controller, using the received pilot strength and load measure information to determine an increased data rate which can be granted to said requesting mobile station without causing excessive interference at said first cell and said at least one adjacent cell; and transmitting a data burst assignment response from the access controller to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 19

Dependent Claim 140 words

The method of claim 17 further comprising the steps of: at the access controller, computing the smallest `m` that satisfies the following inequality for all neighbor base stations, `i`, α(N v i +N v γ s )+mγ d s (z 1 ,z i )≦I 0 s , where N v is the average load in equivalent voice users per cell in the neighborhood, N v i is the load in equivalent voice calls in cell `i`, and z i is the radio distance of the data user to cell `i`, which is derived from the pilot measurement, and where γ d s (z 1 ,z i )=z i /z 1 ; and transmitting a data burst assignment response from the access controller to said requesting mobile station indicating a data rate mB has been granted to the requesting mobile station.

Claim 20

Dependent Claim 106 words

The method of claim 17 wherein when a mobile station is communicating with more than one base stations at multiple cells, at an access controller, using the received pilot strength and the load measure information from each of the more than one base stations to determine an increased data rate which can be granted to said requesting mobile station without causing excessive interference at the multiple cells and at any cell adjacent to those multiple cells; and transmitting a data burst assignment response from the access controller to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 21

Dependent Claim 38 words

The method of claim 19 wherein the access controller determines an increased data rate permitted for each base station and selects the minimum data rate therefrom and transmits the selected minimum data rate to said requesting mobile station.

Claim 22

Dependent Claim 161 words

A code division multiple access system including multiple cells, each cell having a base station and multiple mobile stations, the system comprising: receiving means, at a base station of a first cell, receiving a data burst request from an active mobile station of said first cell requesting a first data rate in excess of the basic data rate (B) allocated to that mobile station, said data burst request including pilot strength information for the base station of said first cell and a base station of at least one cell adjacent to said first cell; and an access controller, using the received pilot strength information to determine an increased data rate which is to be granted to said requesting mobile station without causing excessive interference at said first cell and said at least one adjacent cell and transmitting a data burst assignment response to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 23

Dependent Claim 161 words

A code division multiple access system including multiple cells, each cell having a base station and multiple mobile stations, the system comprising: receiving means, at a base station of a first cell, receiving a data burst request from an active mobile station of said first cell requesting a first data rate in excess of the basic data rate (B) allocated to that mobile station, said data burst request including pilot strength information for the base station of said first cell and a base station of at least one cell adjacent to said first cell; and an access controller, using the received pilot strength information to determine an increased data rate which is to be granted to said requesting mobile station without causing excessive interference at said first cell and said at least one adjacent cell and transmitting a data burst assignment response to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 24

Dependent Claim 47 words

The code division multiple access system of claim 21 wherein the access controller compares the received pilot strength information with a threshold and wherein the increased data rate is assigned to said requesting mobile station when the received pilot strengths have a predetermined relationship to that threshold.

Claim 25

Dependent Claim 55 words

The code division multiple access system of claim 21 wherein a set of thresholds are associated with multiple data burst rates, and wherein the access controller compares received pilot strengths from said at least one adjacent cell with the set of thresholds to determine a data rate to be granted to said requesting mobile station.

Claim 26

Dependent Claim 95 words

The code division multiple access system of claim 21 wherein: the access controller receives a neighbor load update message indicating load measure information at said at least one adjacent cell, uses the received pilot strength and load measure information to determine an increased data rate which can be granted to said requesting mobile station without causing excessive interference at said first cell and said at least one adjacent cell, and transmits a data burst assignment response to said requesting mobile station indicating the increased data rate which has been granted to said requesting mobile station.

Claim 27

Dependent Claim 139 words

The code division multiple access system of claim 21 wherein: the access controller computes the smallest `m` that satisfies the following inequality for all neighbor base stations, `i`, α(N v i +N v γ s )+mγ d s (z 1 ,z i )≦I 0 s , where N v is the average load in equivalent voice users per cell in the neighborhood, N v i is the load in equivalent voice calls in cell `i`, and z i is the radio distance of the data user to cell `i`, which is derived from the pilot measurement, and where γ d s (z 1 ,z i )=z i /z 1 ; and transmits a data burst assignment response from the access controller to said requesting mobile station indicating a data rate mB has been granted to the requesting mobile station.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2001-03-30	2001-09-29	2002-03-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2005-03-30	2005-09-29	2006-03-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2009-03-30	2009-09-29	2010-03-31	$7700.00	Window Closed / Lapsed

Code division multiple access system providing load and interference based demand assignment service to users

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