Systems and methods for cellular radiotelephone system access without system identification comparison
AssigneeEricsson Inc.
InventorMichael D. Fehnel
Life of this patent
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Abstract
A cellular radiotelephone system is accessed by a cellular radiotelephone without requiring System IDentification (SID) comparison during access. Access is performed by eliminating a rescan of Access Channels during access and using the Combined Paging and Access Channel which was identified during initialization for system access. Alternatively, the Access Channels may be rescanned upon an access request and a comparison of the Digital Color Code with the initially scanned channels is made. If the compared Digital Color Code matches, the identified channel is used for system access regardless of its SID.
Claims44
A method of accessing a cellular radiotelephone system by a cellular radiotelephone, said cellular radiotelephone system including a plurality of Dedicated Control Channels and a plurality of Combined Paging and Access Channels associated therewith, each Dedicated Control Channel and Combined Paging and Access Channel transmitting a System IDentification (SID) which is unique to said cellular radiotelephone system, each Combined Paging and Access Channel also transmitting a Digital Color Code (DCC), said accessing method comprising the steps of:
- identifying at least one Dedicated Control Channel having a predetermined System IDentification, prior to a required system access;
- identifying a plurality of first Combined Paging and Access Channels having said predetermined System IDentification, prior to a required system access;
- in response to a required system access, testing whether at least one of the first Combined Paging and Access Channels is useable for a system access;
- if the at least one of the first Combined Paging and Access channels is useable, using the at least one of the first Combined Paging and Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the at least one of the first Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone;
- if the at least one of the first Combined Paging and Access Channels is unusable, identifying a plurality of second Combined Paging and Access Channels without comparing the System IDentification transmitted by the plurality of second Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone;
- comparing the Digital Color Code of at least one of the plurality of second Combined Paging and Access Channels with the Digital Color Code of corresponding at least one of the plurality of first Combined Paging and Access Channels;
- and
- if the Digital Color Codes match, using the at least one of the second plurality of Combined Paging and Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the at least one of the second plurality of Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone.
A method of accessing a cellular radiotelephone system by a cellular radiotelephone, said cellular radiotelephone system including a plurality of Dedicated Control Channels and a plurality of Combined Paging and Access Channels associated therewith, each Dedicated Control Channel and Combined Paging and Access Channel transmitting a System IDentification which is unique to said cellular radiotelephone system, said accessing method comprising the steps of:
- identifying at least one Dedicated Control Channel having a predetermined System IDentification, prior to a required system access;
- identifying a plurality of Combined Paging and Access Channels having said predetermined System IDentification, prior to a required system access;
- and
- in response to a required system access, using one of the identified Combined Paging and Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the one of the identified Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone.
A method of accessing a cellular radiotelephone system by a cellular radiotelephone, said cellular radiotelephone system including a plurality of Dedicated Control Channels and a plurality of Access Channels associated therewith, each Dedicated Control Channel and Access Channel transmitting a System IDentification (SID) which is unique to said cellular radiotelephone system, each Access Channel also transmitting a Digital Color Code (DCC), said accessing method comprising the steps of:
- identifying at least one Dedicated Control Channel having a predetermined System IDentification, prior to a required system access;
- identifying a plurality of first Access Channels having said predetermined System IDentification, prior to a required system access;
- in response to a required system access, identifying a plurality of second Access Channels without comparing the System IDentification transmitted by the plurality of second Access Channels with a System IDentification which is stored in said cellular radiotelephone;
- comparing the Digital Color Code of at least one of the plurality of second Access Channels with the Digital Color Code of corresponding at least one of the plurality of first Access Channels;
- and
- if the Digital Color Codes match, using the at least one of the second plurality of Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the at least one of the second plurality of Access Channels with a System IDentification which is stored in said cellular radiotelephone.
A method of accessing a cellular radiotelephone system by a cellular radiotelephone, said cellular radiotelephone system including a plurality of Access Channels, said accessing method comprising the steps of:
- initializing said cellular radiotelephone;
- waiting for a required system access;
- and
- in response to a required system access, accessing said cellular radiotelephone system using one of said plurality of Access Channels without comparing the System IDentification of said one of said plurality of Access Channels with a System IDentification which is stored in said cellular radiotelephone.
A cellular radiotelephone for accessing a cellular radiotelephone system, said cellular radiotelephone system including a plurality of Dedicated Control Channels and a plurality of Combined Paging and Access Channels associated therewith, each Dedicated Control Channel and Combined Paging and Access Channel transmitting a System IDentification (SID) which is unique to said cellular radiotelephone system, each Combined Paging and Access Channel also transmitting a Digital Color Code (DCC), said cellular radiotelephone comprising:
- means, responsive to activation of said cellular radiotelephone, for identifying at least one Dedicated Control Channel having a predetermined System IDentification;
- means, responsive to said Dedicated Control Channel identifying means, for identifying a plurality of first Combined Paging and Access Channels having said predetermined System IDentification;
- means, responsive to a required system access, for testing whether at least one of the first Combined Paging and Access Channels is useable for a system access;
- means, responsive to said testing means, for using the at least one of the first Combined Paging and Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the at least one of the first Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone, if the at least one of the first Combined Paging and Access channels is useable;
- means, responsive to said testing means, for identifying a plurality of second Combined Paging and Access Channels without comparing the System IDentification transmitted by the plurality of second Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone, if the at least one of the first Combined Paging and Access Channel is unusable;
- means, responsive to said second Combined Paging and Access Channels identifying means, for comparing the Digital Color Code of at least one of the plurality of second Combined Paging and Access Channels with the Digital Color Code of corresponding at least one of the plurality of first Combined Paging and Access Channels;
- and
- means, responsive to said comparing means, for using the at least one of the second plurality of Combined Paging and Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the at least one of the second plurality of Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone, if the Digital Color Codes match.
A cellular radiotelephone for accessing a cellular radiotelephone system, said cellular radiotelephone system including a plurality of Dedicated Control Channels and a plurality of Combined Paging and Access Channels associated therewith, each Dedicated Control Channel and Combined Paging and Access Channel transmitting a System IDentification which is unique to said cellular radiotelephone system, said cellular radiotelephone comprising:
- means, responsive to activation of said cellular radiotelephone, for identifying at least one Dedicated Control Channel having a predetermined System IDentification;
- means, responsive to said Dedicated Control Channel identifying means, for identifying a plurality of Combined Paging and Access Channels having said predetermined System IDentification;
- and
- means, responsive to a required system access, for using one of the identified Combined Paging and Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the one of the identified Combined Paging and Access Channels with a System IDentification which is stored in said cellular radiotelephone.
A cellular radiotelephone for accessing a cellular radiotelephone system, said cellular radiotelephone system including a plurality of Dedicated Control Channels and a plurality of Access Channels associated therewith, each Dedicated Control Channel and Access Channel transmitting a System IDentification (SID) which is unique to said cellular radiotelephone system, each Access Channel also transmitting a Digital Color Code (DCC), said cellular radiotelephone comprising:
- means, responsive to activation of said cellular radiotelephone, for identifying at least one Dedicated Control Channel having a predetermined System IDentification;
- means, responsive to said Dedicated Control Channel identifying means, for identifying a plurality of first Access Channels having said predetermined System IDentification;
- means, responsive to a required system access, for identifying a plurality of second Access Channels without comparing the System IDentification transmitted by the plurality of second Access Channels with a System IDentification which is stored in said cellular radiotelephone;
- means, responsive to said second Combined Paging and Access Channels identifying means, for comparing the Digital Color Code of at least one of the plurality of second Access Channels with the Digital Color Code of corresponding at least one of the plurality of first Access Channels;
- and
- means, responsive to said comparing means, for using the at least one of the second plurality of Access Channels to access the cellular radiotelephone system, without comparing the System IDentification transmitted by the at least one of the second plurality of Access Channels with a System IDentification which is stored in said cellular radiotelephone, if the Digital Color Codes match.
A cellular radiotelephone for accessing a cellular radiotelephone system, said cellular radiotelephone system including a plurality of Access Channels, said cellular radiotelephone comprising:
- means for initializing said cellular radiotelephone;
- means, responsive to said initializing means, for waiting for a required system access;
- and
- means, responsive to a required system access, for accessing said cellular radiotelephone system using one of said plurality of Access Channels without comparing the System IDentification of said one of said plurality of Access Channels with a System IDentification stored in said cellular radiotelephone.
Dependencies are inferred from the claim text.