One cell re-use pattern for communication system sites

• US 5,355,367 A
• Filed: 01/02/1990
• Issued: 10/11/1994
• Est. Priority Date: 01/02/1990
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Major, John E., Sobti, Arun, Comroe, Richard A.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Hsu, Alpus H.
• Application Number:
  US07/459,624
• Time in Patent Office: 1,743 Days
• Field of Search: 370/95.1, 370/95.3, 370/93, 370/105.1, 370/109, 455/63, 455/66, 455/73, 455/74, 455/32.1, 455/33.1, 455/33.4, 455/34.1, 455/34.2, 455/53.1, 455/54.1, 455/54.2, 455/56.1, 455/38.1, 379/58, 379/59, 379/60, 379/63, 375/40, 371/67.1, 371/69.1
• US Class Current: 370/329
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 16/24 Cell structures

Abstract

Within a communication system having a plurality of communication system sites, each communication system site has a one cell re-use pattern of a limited number of communication resources. Communication units within the communication system utilize a redundant transmission of information such that the geographic separation of communication system sites utilizing the same communication resources is reduced.

Claims

1. A method for generating a one cell re-use pattern of a limited number of communication resources for a plurality of communication system sites that are within a communication system, wherein the communication system consists of, at least, a plurality of communication units and a communication resource allocator that allocates the limited number of communication resources among the plurality of communication units, the method comprising the steps of:

a) dividing coverage area of each of the plurality of communication system sites into at least one sector, wherein at least most of the limited number of communication resources are distributed among the at least one sector;

b) positioning the plurality of communication system sites within the communication system such that, at limits of the coverage area, a time variant measurement of a desired call is at most a predetermined value greater than a time variant measurement of an interfering call; and

c) transceiving redundant information by at least some of the plurality of communication units such that negligible interference occurs between the desired call and the interfering call.

2. The method of claim 1 wherein step (c) further comprises the substeps of:

c1) digitizing information that is to be transmitted to produce digitized information; and

c2) transmitting the digitized information redundantly.

3. The method of claim 2 wherein substep (c1) further comprises placing at least one digitized information packet, which contains at least some of the digitized information, redundantly into a digital frame.

4. The method of claim 2 wherein substep (c1) further comprises placing digitized information packets, which contain at least some of the digitized information, redundantly into several digital frames.

5. The method of claim 1 wherein step (c) further comprises the substeps of:

c1) receiving the redundant information in digital frames which contain, at least, redundant digitized information packets; and

c2) recapturing information from at least one of the redundant digitized information packets.

6. The method of claim 5 further comprises receiving a site identifier code.

7. A plurality of communication system sites within a communication system, wherein a limited number of communication resources is available for the plurality of communication system sites, each of the plurality of communication system sites comprises:

a coverage area divided into at least one sector, wherein the limited number of communication resources are distributed among the at least one sector; and

a plurality of communication units operably associated with the coverage area, wherein at least some of the plurality of communication units redundantly transceive digitized information packets.

8. The communication system of claim 7 wherein the at least one sector contains an approximately equal number of the limited number of communication resources.

9. A method for a communication unit to transceive calls within a communication system having a plurality of communication system sites, wherein a limited number of communication resources is available for the plurality of communication system sites and wherein at least most of the plurality of communication system sites has a one cell re-use pattern of the limited number of communication resources, the method comprises the steps of:

a) processing information redundantly to produce redundant information; and

b) transceiving the redundant information.

10. The method of claim 9 further comprises:

b1) receiving the redundant information in digitized form to produce received digitized redundant information; and

a1) recapturing at least most information from the received digitized redundant information.

11. The method of claim 10 wherein step (b1) further comprises having the received digitized redundant information comprising digitized information packets arranged redundantly in digital frames.

12. The method of claim 11 wherein step (b1) further comprises having at least one of the digitized information packets redundantly contained within at least one of the digital frames.

13. The method of claim 11 wherein step (b1) further comprises having several of the digital frames redundantly containing several of the digitized information packets.

14. The method of claim 9 further comprises:

a1) digitizing the information to produce digitized information; and

b1) transmitting the digitized information redundantly to produce digitized redundant information.

15. The method of claim 14 wherein step (b1) further comprises placing the digitized information into digitized information packets which are transmitted in digital frames.

16. The method of claim 15 wherein step (b1) further comprises having at least one of the digitized information packets redundantly contained within at least one of the digital frames.

17. The method of claim 15 wherein step (b1) further comprises having several of the digital frames redundantly containing several of the digitized information packets.

18. A communication unit for use within a communication system having a plurality of communication system sites, wherein a limited number of communication resources is available for the plurality of communication system sites and wherein at least most of the plurality of communication system sites has a one cell re-use pattern of the limited number of communication resources, the communication unit comprises:

processing means for processing redundant information.

transceiving means, operably associated with the processing means, for transceiving the redundant information.

19. The communication unit of claim 18 wherein the processing means further comprises means for digitizing the redundant information into digitized information packets, wherein the digitized information packets are redundantly contained within digital frames.

20. The communication unit of claim 19 wherein the processing means further comprises means for placing at least one of the digitized information packets redundantly into at least one of the digital frames.

21. The communication unit of claim 19 wherein the processing means further comprises means for having several of the digital frames redundantly containing several of the digitized information packets.

22. The communication unit of claim 19 wherein the transceiving means further comprises means for recapturing at least most information from the digitized information packets received.

23. The communication unit of claim 22 wherein the transceiving means further comprises means for utilizing previously recaptured digitized information packets when information is not recovered from present digitized information packets.

24. A communication system having a plurality of communication system sites, wherein a first limited number of communication resources and a second limited number of communication resources are available for the plurality of communication system sites and wherein the communication system contains, at least, a communication resource allocator for allocating the first limited number of communication resources and the second limited number of communication resources among a plurality of communication units, each of at least some of the plurality of communication system sites comprises;

first communication region having a one cell re-use pattern of the first limited number of communication resources;

second communication region, substantially superimposed on the first communication region, having a multi-cell re-use pattern of at least some of the second limited number of communication resources; and

at least some of the plurality of communication units transceive redundant information.

25. The communication system of claim 24 wherein the communication resource allocation further comprises means for allocating a communication resource of the first limited number of communication resources, if available, to a requesting communication unit of the plurality of communication units having an interference ratio above a first predetermined level.

26. The communication system of claim 25 wherein the communication resource allocation further comprises means for allocating a communication resource of the at least some of the second limited number of communication resources, when available, to a requesting communication unit of the plurality of communication units having an interference ratio below the first predetermined level.

27. The communication system of claim 25 wherein the communication resource allocation further comprises means for allocating a communication resource of the at least some of the second limited number of communication resources, if available, when none of the first limited number of communication resources are available, otherwise allocating next available communication resource of either the first limited number of communication resources or the at least some of the second limited number of communication resources.

28. The communication system of claim 24 wherein the communication resource allocation further comprises means for transferring a call from a communication resource of the first limited number of communication resources to a communication resource of the at least some of the second limited number of communication resources, if available, when an interference ratio falls below a first predetermined level.

29. The communication system of claim 24 wherein the communication resource allocation further comprises means for transferring a call from a communication resource of the at least some of the second limited number of communication resources to a communication resource of the first limited number of communication resources, if available, when an interference ratio is above a first predetermined level.

30. A method for a communication unit of a plurality of communication units to transceive calls within a communication system having a plurality of communication system sites and a communication resource allocator for allocating a first limited number of communication resources and at least some of a second limited number of communication resources among the plurality of communication units, wherein the first limited number of communication resources and the second limited number of communication resources are available for the plurality of communication system sites, and wherein each of at least some of the plurality of communication system sites consists of first communication region having a one cell re-use pattern of the first limited number of communication resources and a second communication region having a multi-cell re-use pattern of at least some of the second limited number of communication resources, the method comprises the steps of:

a) determining interference ratio information;

b) transmitting interference ratio information;

c) accessing, when available, a control resource of the first limited number of communication resources when the interference ratio is above a first predetermined level, otherwise, accessing, when available, a control resource of the at least some of the second limited number of communication resources.

31. The method of claim 30, wherein the communication unit is accessing a communication resource of the first limited number of communication resources, further comprises the steps of:

c) processing redundant information; and

d) transceiving the redundant information.

32. The method of claim 31 further comprises the steps of:

d1) receiving the redundant information in digitized form as digitized redundant information; and

c) recapturing at least most information from the digitized redundant information.

33. The method of claim 31 further comprises the steps of:

c1) digitizing information to produce digitized information; and

d1) transmitting the digitized information redundantly to produce digitized redundant information.

34. A communication unit of a plurality of communication units that communicates within a communication system having a plurality of communication system sites and a communication resource allocator for allocating a first limited number of communication resources and at least some of a second limited number of communication resources among the plurality of communication units and wherein the first limited number of communication resources and the second limited number of communication resources are available for the plurality of communication system sites, and wherein each of at least some of the plurality of communication system sites consists of first communication region having a one cell re-use pattern of the first limited number of communication resources and a second communication region having a multi-cell re-use pattern of at least some of the second limited number of communication resources, the communication unit comprises:

processing means for processing redundant information when accessing a communication resource of the first limited number of communication resources, and for processing information when accessing a communication resource of the at least some of the second limited number of communication resources;

interference ratio means for determining an interference ratio; and

transceiving means, operably associated with the processing means and the interference ratio means, for transceiving the redundant information and the information, and for transmitting the interference ratio.