High speed data communication system and method

• US 6,438,115 B1
• Filed: 03/08/1999
• Issued: 08/20/2002
• Est. Priority Date: 03/08/1999
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lindheimer, Christofer, Molnö, Johan, Mazur, Sara
• Primary Examiner(s): Hsu, Alpus H.
• Assistant Examiner(s): Qureshi, Afsar M.
• Application Number:
  US09/263,950
• Time in Patent Office: 1,261 Days
• Field of Search: 455/447, 455/450, 455/452, 455/442, 455/502, 455/422, 455/466, 455/562, 455/403, 455/456, 455/25, 455/438, 370/330, 370/335, 370/347, 370/337, 370/280, 370/281, 375/132, 375/133, 375/135, 375/136, 375/200, 375/354, 375/355, 375/356
• US Class Current: 370/330
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A system and method for a synchronized packet data communication system is described. Briefly control channels are transmitted in a reuse pattern defined by both frequency and timeslot division. Each timeslot division is such that different timeslot groups included in the repetition pattern are separated by at least one timeslot. No traffic data transmissions occur simultaneous to the control channel transmissions. Furthermore, a synchronization channel is introduced to be transmitted on the same physical channel as other packet common control channels.

Claims

1. A cellular communications system comprising at least one base station site synchronized system part, including a packet switched mode, wherein packet control channels are allocated on physical channels, consisting of a combination of frequency and at least one time slot, and wherein said physical channels carrying packet control signalling are arranged in a reuse pattern, such that both frequency and timeslot are utilized in said reuse pattern, comprising;

means for allocating, in a first base station site, said control channel signalling to a certain set of physical channels on at least one frequency and a certain time group, defined by at least one timeslot,

means for allocating, in a second base station site, said control channel signalling to a certain set of physical channels on said at least one frequency and a certain time group, defined by at least one timeslot, wherein said time group used in said second base station site is defined to be non-simultaneous in transmission to said time group used in said first base station site,

means for preventing, in said second base station site, the allocation of user data channels on physical channels that substantially coincide in time and frequency with physical channels allocated for control channel signalling in said first base station site.

2. The system of claim 1, wherein said synchronized system part transmits information over the air on 200 kHz carriers, each carrier being divided into 8 timeslots.

3. The system of claim 1, wherein, for the synchronized system part, control signalling allocation in a substantial communication coverage region is done on three 200 kHz carriers in a 1/3 frequency reuse pattern and an overlaid 1/3 time group reuse pattern, creating 9 groups of physical channels, each group being defined by a frequency and at least one timeslot.

4. The system of claim 1, wherein user data traffic is transmitted on physical channels arranged in a 1/3 reuse pattern.

5. The system of claim 1, wherein, for the synchronized system part, control signalling allocation in a substantial communication coverage region is done on three 200 kHz carriers in a 1/3 frequency reuse pattern and an overlaid 1/4 time group reuse pattern, creating 12 groups of physical channels, each group being defined by a frequency and at least one timeslot.

6. A cellular communications system comprising at least one base station site synchronized system part, including a packet switched mode, wherein packet control channels are allocated on physical channels consisting of a combination of frequency and at least one time slot, and wherein said physical channels carrying packet control signalling are arranged in a reuse pattern, such that both frequency and timeslot are utilized in said reuse pattern, comprising;

means for allocating, in a first base station site, said control channel signalling to a certain set of physical channels on at least one frequency and a certain time group, defined by at least one timeslot,

means for allocating, in a second base station site, said control channel signalling to a certain set of physical channels on said at least one frequency and a certain time group, defined by at least one timeslot, wherein said time group used in said second base station site is defined to be non-simultaneous in transmission to said time group used in said first base station site and wherein the transmission is separated in time corresponding to at least one timeslot.

7. The system of claim 6, wherein said synchronized system part transmits information over the air on 200 kHz carriers, each carrier being divided into 8 timeslots.

8. The system of claim 6, wherein, for the synchronized system part, control signalling allocation in a substantial communication coverage region is done on three 200 kHz carriers in a 1/3 frequency reuse pattern and an overlaid 1/3 time group reuse pattern, creating 9 groups of physical channels, each group being defined by a frequency and at least one timeslot.

9. The system of claim 6, wherein user data traffic is transmitted on physical channels arranged in a 1/3 reuse pattern.

10. The system of claim 6, wherein, for the synchronized system part, control signalling allocation in a substantial communication coverage region is done on three 200 kHz carriers in a 1/3 frequency reuse pattern and an overlaid 1/4 time group reuse pattern, creating 12 groups of physical channels, each group being defined by a frequency and at least one timeslot.

11. A method in a cellular communications system comprising at least one base station site synchronized system part, including a packet switched mode, where packet control channels are allocated on physical channels consisting of a combination of frequency and at least one time slot, wherein said physical channels carrying packet control signalling are arranged in a reuse pattern, such that both frequency and timeslot are utilized in said reuse pattern, said method comprising the steps of;

allocating in a first base station site, said control channel signaling to a certain set of physical channels on at least one frequency and a certain time group, defined by at least one timeslot,

allocating in a second base station site, said control channel signalling to a certain set of physical channels on said at least one frequency and a certain time group, defined by at least one timeslot, where said time group used in said second base station site is defined to be non-simultaneous in transmission to said time group used in said first base station site,

preventing the allocation of user data channels on physical channels that substantially coincide in time and frequency, with physical channels allocated for control channel signalling in said first base station site.

12. A method in a cellular communications system comprising at least one base station site synchronized system part, including a packet switched code, wherein packet control channels are allocated on physical channels consisting of a combination of frequency and at least one time slot, and wherein said physical channels carrying packet control signalling are arranged in a reuse pattern, such that both frequency and timeslot are utilized in said reuse pattern, said method further comprising the steps of;

allocating in a first base station site, said control channel signalling to a certain set of physical channels on at least one frequency and a certain time group, defined by at least one timeslot,

allocating in a second base station site, said control channel signalling to a certain set of physical channels on said at least one frequency and a certain time group, defined by at least one timeslot, wherein said time group used in said second base station site is defined to be non-simultaneous in transmission to said time group used in said first base station site and wherein the transmission is separated in time corresponding to at least one timeslot.