VWGoA - Ex. 1022
`Volkswagen Group of America, Inc., Petitioner
`
`1
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`

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`U.S. Patent
`
`Mar. 10, 1993
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`Sheet 1 of 30
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`5,726,984
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`Figurela
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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 2 of 30
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`5,726,984
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`Mar. 10, 1998
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`U.S. Patent
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`Mar. 10, 1993
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`U.S. Patent
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`Mar. 10, 1998
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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 7 of so
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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 3 of so
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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 9 of 80
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`Mai‘. 10, 1993
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`Sheet 10 of 30
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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 11 of so
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`5,726,984
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`U.S. Patent
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`Mar. 10, 1998
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`Sheet 12 of so
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`Mar. 10, 1998
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` U.S.Patent
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`Mar. 10, 1993
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`Sheet 16 of 80
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`5,726,984
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`

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`U.S. Patent
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`Mar. 10, 1998
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`Sheet 19 of 30
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`5,726,984
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`initial Ac uisition Algorithm
`Base tation Selected
`
`Mobile Computing Device (MCD)
`Registers with Appropriate
`Base Station
`
`
` MCD Monitors Communication
`
`Link Qual‘
`, And Stores
`
`
`lnfonnation eceived From
`
`
`HELLO Messages Such As Costs
`of Connection And Frequency
`Hop Sequences
`
`
`
`
`
` Communication
`
`Link Quality
`Acceptable?
`
`
`
`NO
`
`Figure 16a
`
`20
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`

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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 20 of so
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`5,726,984
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`
`
`Yes
`
`°
`
`21
`
`
`
`
`Synchronization Attempted with
`N
`Another Base Station, Selection
` Any Untried Base
`
`Stations Left?
`Based on Lowest Cost of
`
`
`Connection
`
`Achieved?
`
` Synchronization
`
`
`
`New Communication Link Quality
`Monitored
`
`
`
`
`Communication
`Link Quality
`Acceptable?
`
`
`
`
`MCD Continues Monitori
`Communication Link Until
`
`
`HELLO Message is Received From
`
`the Base Station
`
`
`Cost of
`Communication
`
`
`Link Acceptable?
`
`
`
`Yes
`
`Figure 16b
`
`21
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`

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`U.S. Patent
`
`Mar. 10, 1993
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`Sheet 21 of so
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`5,726,984
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`
`Initial Synchronization.
`Coordinate with Priority
`SYNC
`
` Go To Sleep _
`
`
`
`
`Wake Up And Wait To
`Receive Next Priority
`SYNC
`
`
`
`
`
`2 of Last 3
`SYNC's Not
`Received?
`
`
`
`SYNC Recieved?
`
`
`
`
`
`
`
`
`2
`of Last 3 SYNC's
`
`
`Have Poor
`Signals?
`
`
`
`Stay Awake To Test
`Communication Link
`
`
`
`
`
` No
`
`Execute Roaming
`Algorithm
`
`Link
`Acceptable?
`
`Figure 17
`
`22
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`

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`U.S. Patent
`
`Mar. 10, 1998
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`Sheet 22 of 30
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`5,726,984
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`Coordinate with Priority
`SYNC
`
` Initial Synchronization,
` Sleep A Long Time (e.g.,
`Seconds)
`
`
`
`Wake Up Short Time
`(e.g., 500 ps) Before
`Expected Beginning Of
`Access interval
`
`
`
`
`
`
`
`Wait To Receive Next
`Priority SYNC
`
`SYNC Received?
`
`Link Acceptable?
`
`
`
`
`
`Stay Awake To Test
`Communication Link
`
`
`
`
`
`Link
`Acceptable?
`
`No
`
`Figure 18
`
`Execute Roaming
`Algorithm
`
`23
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`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`sheeizs of 30
`
`5,726,984
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`Transmit SYNC
`
`Transmit HELLO
`(Optional)
`
`Determine Extent Of
`Channel Traffic
`
`Yes
`
`3 II
`0
`
`Medium Traffic?
`
`‘U3
`
`IIVA-‘-‘..-5.5
`Slots
`
`Reservation Resolution
`Poll:
`Place Addresses of
`Identified Devices in
`Polling Queue. Transmit
`Fall To First Unit in
`Polling Queue. Polling
`Queue Order Is:
`(1) Outbound Messages
`For Active Units
`(2) Units Requesting a
`Poll ln Previous
`Access intervals
`(3) Units Requesting A
`Poll in Current
`Access interval
`
`
`
`Heavy Traffic:
`n > 1, p < 1
`
`Transmit Reservation
`Poll, Including: n,p.
`Addresses With Pending
`Messages. Reserved
`lDMA
`
`Receive Requests For
`Po|l's (RFP's) From
`Devices In Reservation
`
`Figure 19a
`
`24
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`

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`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 24 of 30
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`5,726,984
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`
`
`
`
`Wait For Response
`To Poll (Data
`Fragment)
`
`
`
`
`
`esponse
`Indicate E00
`End-Of-Data)
`
`Yes
`
`Figure 19b-1
`
`
`Polling Queue
`
` Response
`Received Within
`Timeout?
`
`Addresses
`Remain in
`
`25
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`

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`U.S. Patent
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`Mar. 10, 1998
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`Sheet 25 of 80
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`5,726,984
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`I9
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`5
`
`5
`
`6
`
`Yes
`
`
`
`
`Polling
`Queue7Empty
`
`Yes
`
`NO
`
`Address
`
`No
`
`Transmit ‘
`Poll To
`Next
`
`
`
`
`
`Control
`Point Device To
`Immediately Initiate
`
`Communication
`
`?
`
`
`NO
`
`Clear Message
`Transmitted. p :0.
`(Explicit {die Sense)
`
`Clear
`Message
`Transmitted.
`
`P = 0
`
`Figure 19b-2
`
`26
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`

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`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 26 of 80
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`5,726,984
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`Transmit SYNC
`
`Transmit HELLO
`(Optional)
`
`Channel Traffic
`
`Determine Extent of
`
`Yes
`
`n=1
`
`p<1
`
`
`
`Heavy Traffic:
`n > 1, p < 1
`
`
`
`Transmit Reservation
`
`Poll, Including: n,p,
`Addresses with
`
`Pending Messages,
`Reserved IDMA
`
`Reservation Slots
`
`Reservation Resolution Poll:
`Place Addresses of Identified
`Devices in Polling Queue,
`Transmit Poll to First Unit in
`Polling Queue. Polling Queue
`Order ls:
`(1) Outbound Messages for
`Active Units
`(2) Units Req/iiesting a Poll in
`Previous
`cce_ss Intervals
`(3) Units Requesting a Poll in
`Current Access Interval
`
`Fig. 20a
`
`Receive iqequests for
`pen-S (nppie) from
`Devices in
`
`
`
`
`
`27
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`

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`U.S. Patent
`
`Mar. 10, 1998
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`Sheet 27 of so
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`5,726,984
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`I3
`
`N° Address Remains in
`
`
`
`Wait To Receive Poll
`
`From Device
`
` Poll
`Received
`
`
`
`
`Within
`
`Polling Queue
`
`Timeout’?
`
`Yes
`
`Send Data
`
`Fragment
`
`
`
`
`End-Of-Data
`Fragment?
`
`
`
`YES
`
`Wait For Ciear
`
`Device
`
`Message From
`
`Figure 20b-1
`
`28
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`

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`U.S. Patent
`
`Mar. 10, 1998
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`Sheet 28 of so
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`5,726,984
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`?
`
`
`
`
`
`
`
`Removed Yes
`
`Clear
`
`Message
`Received
`
`Within
`
`Device Address
`
`
`Remains in Polling
`Queue
`
`Timeout
`7
`
`
`
`
` Near End
`Of Access
`
`Interval
`
`?
`
`
`
`
`Yes
`
`Message. p = o
`
`No
`To Poll
`
`Yes
`
`Transmit Request For
`Poll (RFP) To Next
`Device in Polling .
`Queue
`
`Continue Inbound
`Aigorithrn:
`
`2) Wait For Response
`
`Yes
`
`Transmit Clear
`
`Message, p at o.
`
`Figure 20b-2
`
`29
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`

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`U.S. Patent
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`Mar. 10, 1998
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`Sheet 29 of 30
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`5,726,984
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`Mar. 10, 1998
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`Mar. 10, 1998
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`Mar. 10, 1993
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`Mar. 10, 1998
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`Mar. 10, 1998
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`Sheet 36 of so
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`Sheet 37 of 80
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`5,726,984
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`Mar. 10, 1993
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`Sheet 33 of 30
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`5,726,984
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`U.S. Patent
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`Mar. 10, 1993
`
`Sheet 39 of 30
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`5,726,984
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`U.S. Patent
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`Mar. 10, 1993
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`Sheet 41 of 80
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`5,726,984
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`U.S. Patent
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`Mar. 10, 1993
`
`Sheet 42 of 30
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`5,726,984
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`43
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`
`U.S. Patent
`
`Mar. 10, 1998
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`Sheet 43 of 30
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`5,726,984
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`Fig. 32
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`
`U.S. Patent
`
`Mar. 10, 1993
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`Sheet 44 of 30
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` U.S.Patent
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`Mar. 10, 1993
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`Sheet 45 of 80
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`5,726,984
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`
`U.S. Patent
`
`Mar. 10, 1998
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`Sheet 46 of 30
`
`5,726,984
`
`A TRANSMISION
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`Fig. 35
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`
`47
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 47 of 80
`
`5,726,984
`
`Fig. 36
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`Mar. 10, 1998
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`Sheet 49 of 80
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`5,726,984
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`Figure38
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`U.S. Patent
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`Mar. 10, 1993
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`5,726,984
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`Mar. 10, 1993
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`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 52 of so
`
`5,726,984
`
`MAC Select/Service
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`
`3823
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`
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`Vehicular LAN
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`MAC Routines
`
`WAN MAC
`
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`PHY Layer
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`Figure 42
`
`53
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`

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`U.S. Patent
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`1|.mm.
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`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 54 of 30
`
`5,726,984
`
`3957
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`Continue Master LAN
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`Participation Until Need
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`55
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`Mar. 10, 1998
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`Sheet 55 of 80
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`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 56 of 30
`
`5,726,984
`
`Fig. 46a
`
`57
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 57 of so
`
`5,726,984
`
`58
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 58 of 80
`
`5,726,984
`
`Await Incoming Transmission/Log Request
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`Fig. 47a
`
`59
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 59 of 30
`
`5,726,984
`
`Next Code/
`
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`
`60
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 60 of so
`
`5,726,984
`
`4805
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`61
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`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 61 of so
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`5,726,984
`
`4903
`
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`
`62
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`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 62 of 30
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`5,726,984
`
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`
`63
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`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 63 of 30
`
`5,726,984
`
`4944
`
`4945
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`4933
`
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`
`64
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 64 of so
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`
`5,726,984
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`LAN Transceiver
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`Fig. 50
`
`65
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 65 of 30
`
`5,726,984
`
`Attempt Exact
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`
`5101
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`
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`Information
`
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`51 13
`
`Fig. 51 a
`
`66
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 66 of so
`
`5,726,984
`
`Compare Received
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`Fig. 51b
`
`67
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 67 of 30
`
`5,726,984
`
`Main Category (Grocery)
`
`Sub-Category (Beans)
`
`Sub-Sub-Category (Lima)
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`
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`
`Sub-Sub-Sub-Sub-Sub-Category (10 02.)
`
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`
`Fig. 52
`
`68
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 68 of so
`
`5,726,984
`
`Other Information
`
`k 5301
`
`Fig. 53
`
`69
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 69 of 80
`
`5,726,984
`
`Retrieve Next
`
`5401
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`Fig. 54
`
`70
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 70 of 30
`
`5,726,984
`
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`71
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`71
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`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 71 of so
`
`5,726,984
`
`Non-Assisting
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`Device (s)
`
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`Fig. 55b
`
`72
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 72 of so
`
`483,627.,5
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`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 73 of so
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`489,627,5
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`U.S. Patent
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`Mar. 10, 1993
`
`Sheet 74 of 80
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`5,726,984
`
`5525
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`75
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`

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`Mar. 10, 1998
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`Sheet 75 of so
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`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 76 of so
`
`5,726,984
`
`Packet Processing Idle State
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`and Cost
`
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`Fig. 59
`
`77
`
`

`
`U.S. Patent
`
`Mar. 10, 1998
`
`Sheet 77 of so
`
`5,726,984
`
`
`
`
`
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`Construct Call
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`Request
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`Fig. 60
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`
`78
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 73 of so
`
`5,726,984
`
`Offer Other
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`
`Yes
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`
`79
`
`

`
`U.S. Patent
`
`Mar. 10, 1993
`
`Sheet 79 of so
`
`4899627.,5
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`9230Q2
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`5,726,984
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`1
`HIERARCIIICAL DATA COLLECTION
`NETWORK SUPPORTING PACKETIZED
`VOICE COMMUNICATIONS AMONG
`WIRELESS TERMINALS AND TELEPIIONES
`CROSS REFERENCE TO RELATED
`APPLICATIONS
`
`This application is a continuation in part of U.S. Ser. No.
`08/487,609, filed Inn. 7, 1995, which is a continuation in
`part of U.S. Ser. No. 08/279,148 filed Jul. 22. 1994, U.S. Pat.
`No. 5,657,317, Ser. No. 07/876,629 filed Apr. 30, 1992.
`abandoned, and Ser. No. 08/267,758 filed Jul. 5, 1994. U.S.
`Pat No. 5.568.645 . The application U.S. Ser. No. 08/279,
`148 is a continuation in part of U.S. Ser. No. 08/205,639
`filed Mar. 4, 1994 U.S. Pat. No. 5,555,276, and Ser. No.
`08/275,821 filed Jun. 10, 1994, abandoned. The application
`U.S. Ser. No. 08/279,148 is also based on PCI‘ Application
`Ser. No. PCT/US94/05037 filed May 6. 1994.
`The PCI‘ Application Ser. No. PCT/US94/05037 claims
`priority to U.S. Ser. No. 08/198,404 filed Feb. 22, 1994.
`abandoned. which is itself a continuation of U.S. Ser. No.
`08/198,452 filed Feb. 18. 1994. abandoned. The U.S. Ser.
`No. 08/198,452 is a continuation in part of U.S. Ser. No.
`08/168,478 filed Dec. 16, 1993. abandoned, and is also
`based on PCT Application Ser. No. PCI‘/US93/12628 field
`Dec. 23. 1993. The U.S. Ser. No. 08/168,478 is a continu-
`ation in part of U.S. Ser. No. 08/147,377 filed Nov. 3, 1993,
`abandoned, which is a continuation in pm of U.S. Ser. No.
`08/101,254 field Aug. 3, 1993. abandoned, which, in turn, is
`a continuation in part of U.S. Ser. No. 08/085,662 filed Jun.
`29, 1993 abandoned. The application U.S. Ser. No. 08/085.
`662 is a continuation in part of U.S. Ser. No. 08/076,340
`filed Jun. 11. 1993, abandoned, which is a continuation in
`part of U.S. Ser. No. 08/062,457 filed May 11, 1993 .
`abandoned.
`
`The PCI‘ application Ser. No. PCI‘lUS93/12628 is based
`on U.S. Ser. No. 08/027.140 filed Mar. 5, 1993, U.S. Pat. No.
`5.602.854, which is itself a continuation in part of U.S. Set.
`No. 07/997,693 filed Dec. 23, 1992, now abandoned, which
`is a continuation in part of U.S. Ser. No. 07/982,292 filed
`Nov. 27, 1992. now abandoned The U.S. Ser. No. 07/982,
`292 is itself a continuation in part of U.S. Ser. No. 07/700.
`704 filed May 14, 1991, now abandoned, which is itself a
`continuation in part of U.S. Ser. No. 07/699,818 filed May
`13, 1991, now abandoned.
`The application U.S. Ser. Nos. 08/205,639 is a continu-
`ation in part of U.S. Ser. No. 07/735,128 filed Jul. 22. 1991.
`U.S. Pat. No. 5.365 .546. which is itself a continuation in part
`of U.S. Ser. No. 07/467,096 filed Jan. 18, 1990, now U.S.
`Pat. No. 5,052,020.
`The application U.S. Set. No. 08/062,457 is a continua-
`tion in part of U.S. Ser. No. 07/876,776 filed Apr. 28, 1992.
`abandoned, which is itself a continuation in part of U.S. Ser.
`No. 07/854,115 filed Mar. 18, 1992, abandoned, which, in
`turn, is a continuation in part of U.S. Ser. No. 07/558,895
`filed Jul. 25. 1990, abandoned. ‘The application U.S. Ser. No.
`07/558,895 is a continuation in part of U.S. Ser. No. 07/529.
`353 filed May 25, 1990. abandoned, which is a continuation
`in part of U.S. Ser. No. 07/347,602 filed May 3. 1989,
`abandoned, which is itself a continuation of U.S. Ser. No.
`07/345,771 filed May 2, 1989, U.S. Pat. No 5,009,337. The
`application U.S. Ser. No. 07/345,771 is a continuation of
`U.S. Ser. No. 07/345,200 filed Apr. 28. 1989. abandoned.
`which is itself a continuation of U.S. Ser. No. 07/305,302
`filed Jan. 31, 1989.
`The application U.S. Ser. No. 07/876,629 is also a con-
`tinuation in part of U.S. Ser. No. 07/854, 115, filed Mat. 18,
`
`10
`
`15
`
`25
`
`35
`
`45
`
`S0
`
`2
`
`1992, abandoned. with its parentage as listed above. The
`application U.S. Ser. No. 08/267,758 is a continuation in pan
`of U.S. Set. No. 07/748,150 filed Aug. 21. 1991. now issued
`as U.S. Pat. No. 5,349,678 on Sep. 20. 1994.
`
`INCORPORATION BY REFERENCE
`
`The above referenced applications. PCI‘ Application No.
`PCI‘/US92/08610 filed Oct. 1, 1992. as published under
`International Publication No. WO 93/07691 on Apr. 15.
`1993, together with U.S. Pat. No. 5,070,536, by Mahany et
`al., U.S. Pat. No. 4,9?A,426, by Sojka. and U.S. Pat. No.
`4.910.794, by Mahany, are incorporated herein by reference
`in their entirety, including drawings and appendices. and
`hereby are made a part of this application.
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`
`The present invention relates generally to data commu-
`nication networks having a plurality of wired and/or wireless
`access servers configured to support remote processing. data
`storage and voice communication. More specifically, this
`invention relates to the intelligent routing of packetized
`voice communication between telephones and radio tenni-
`nals through wireless and hardwired channels in a data
`processing network.
`While the present invention is described herein with
`reference to illustrative embodiments for particular
`applications, it should be understood that the invention is not
`limited thereto. Those having ordinary skill in the art and
`access to the teachings provided herein will recognize
`additional modifications, applications and embodiments
`within the scope thereof and additional fields in which the
`present invention would be of significant utility.
`2. Description of Related Art
`To support data collection. multiple radio base station
`networks have been developed to overcome a variety of
`problems with single radio base station networks such as
`spanning physical radio wave penetration barriers. wasted
`transmission power by portable compufing devices. etc.
`However, multiple radio base station networks have their
`own inherent problems.
`For example, in a multiple base station network employ-
`ing a single shared channel. each base station transmission
`is prone to collision with neighboring base station transmis-
`sions in the overlapping coverage areas between the base
`stations. Therefore, it ofien proves undesirable for each base
`station to use a single or common communication channel.
`In contradistinction. to facilitate the roaming of portable
`or mobile devices from one coverage area to another, use of
`a common communication channel for all of the base
`stations is convenient. A roaming device may easily move
`between coverage areas without loss of connectivity to the
`network.
`
`Such exemplary competing commonality factors have
`resulted in tradeofl’ decisions in network design. These
`factors become even more significant when implementing a
`frequency hopping spread spectrum network. Frequency
`hopping is a desirable transmission technique because of its
`ability to combat frequency selective fading, avoid narrow-
`band interfaence, and provide multiple communications
`channels.
`
`65
`
`Again, however, changing operating parameters between
`coverage areas creates difliculties for the roaming devices
`which move therebetween. In particular, when different
`communication parameters are used. a portable or mobile
`
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`5,726,984
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`4
`
`device roaming into a new base station coverage area is not
`able to communicate with the new base station without
`obtaining and synchronizing to the new parameters. This
`causes a communication backlog in data collection net-
`works.
`Such data collection networks and their communication
`protocols have been specifically designed for data collection
`and forwarding through wireless and hardwired links. They
`are designed in attempts to optimize overall data flow
`through the network. Among other flow optimizing tech-
`niques used. the data is segmented and packetized in prepa-
`ration for transmission. Packet by packet. the data is trans-
`mitted as channel bandwidth becomes available.
`Thus. instead of disabling a channel by dedicating band-
`width to service only a pair of participants exchanging
`potentially large amounts of data (data possibly having no
`immediate need).
`the channel
`is shared by many
`participants. each sending segments of data in packets
`whenever an opening in the channel occurs.
`In contrast. to support the delivery of real time voice.
`alternate network design constraints must be considered. For
`example, such networks often dedicated bandwidth to voice
`transmission exchanges. However. by dedicating channel
`bandwidth to voice. eflicient communication of data through
`such networks is seriously impacted. Data communication
`would have to wait for longer periods of time until dedicated
`voice bandwidth has been released. Similarly. data commu-
`nication would have to be immediately discontinued upon
`requests for voice bandwidth.
`Thus. there is a need for a communication network that
`provides eflicient distribution and utilization of network
`resources in support of both data and voice delivery.
`An object of the invention is to provide a method and
`apparatus wherein seamless voice and data communication
`is provided among both roaming devices within wireless
`portions of a communication network and stationary devices
`within hardwired portions of the network.
`Another object of the present invention is to provide a
`hierarchical communications system for providing an efli-
`cient communication pathway for both data and voice.
`Other objects. advantages, and novel features of the
`present invention will become apparent from the following
`detailed description of the invention when considered in
`conjunction with the accompanying drawings.
`SUMMARY OF THE INVENTION
`
`The present invention solves many of the foregoing
`problems in a variety of embodiments. For example. in one
`embodiment. a communication network is disclosed which
`operates to support voice and data communication within a
`premises. The communication network comprises a plurality
`of mobile network devices, a stationary network device. a
`wireless network. a hardwired network and a telephone.
`Each mobile network device has a buffer that stores
`incoming digital voice infonnation for a predetermined
`queuing period before beginning voice reproduction from
`the stored digital voice information. Each mobile network
`device uses the wireless network to selectively exchange
`voice and data packets with other mobile network devices.
`Similarly. the hardwired network is connected to both said
`stationary network device and the wireless network. and is
`used to route voice and data packets between the stationary
`network device and the plurality of mobile network devices
`which participate via the wireless network.
`The telephone, which is connected to the stationary net-
`work device. captures. delivers. receives and reproduces
`voice in an analog voice stream form.
`
`The stationary network device also has a buifer that stores
`digital voice information, received from the wireless
`network. for a predetermined queuing period before con-
`verting it into an analog voice stream. After conversion. the
`stationary network device delivers the analog voice stream
`to the telephone. In addition. the stationary network device
`converts analog voice st1'earns received from the telephone
`into voice packets for delivery via the hardwired and wire-
`less networks to a selected one of the mobile network
`devices.
`
`Further detail regarding this embodiment and variations
`thereof are also disclosed. For example. the predetermined
`queuing period can be determined through examining delays
`found in test signal routing. The stationary network device
`can be a computer. The wireless network may utilize a
`polling protocol and spanning tree routing. The stationary
`network device can provide call setup assistance for the
`telephone.
`Moreover. the communication network may further com-
`prise a telephone switching network. connected to the sta-
`tionary network device. which selectively routes analog
`voice streams received from the telephone onto the tele-
`phone switching network. The stationary network device
`may also selectively route analog voice streams received
`from the telephone switching network to the telephone.
`Further detail regarding the present
`invention (and
`embodiments thereof) may be found in reference to the
`claims below. in view of the following detailed description
`and drawings.
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1A is a diagrammatic illustration of a hierarchal
`communication system built in accordance with the present
`invention.
`
`FIG. 1B is a diagrammatic illustration of another hierar-
`chal communication system built in accordance with the
`present invention.
`FIG. 1C is a diagrammatic illustration of still another
`hierarchal communication system built in accordance with
`the present invention.
`FIG. 2 illustrates an embodiment of a basic access interval
`structure used by a hierarchical network of the present
`invention.
`
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`FIGS. 3A and 3B illustrate the frequency of operation
`periodically changing corresponding to access interval
`boundaries in a frequency hopping cormnunication protocol
`of the present invention.
`FIGS. 4A and 4B illustrate more than one access interval
`being used per hop in a frequency hopping communication
`protocol of the present invention.
`FIG. 5A illustrates an embodiment of an access interval
`used by the hierarchical network of the present invention
`wherein a reservation phase is Idle Sense Multiple Access.
`FIG. SB illustrates an embodiment of an access interval
`used by the hierarchical network of the present invention
`wherein a device response follows a reservation poll.
`FIG. 6A illustrates an embodiment of an access interval
`used by the hierarchical network of the present invention
`having multiple reservation slots for transmission of a
`Request For Poll signal.
`FIG. 6B illustrates an embodiment of an access interval
`used by the hierarchical network of the present invention
`wher