Random access channel prioritization scheme
First Claim
1. Method for transmitting and receiving data in a code division multiple access telecommunication system, comprising the steps of:
- providing a random access time window comprising a plurality of random access slots for transmitting random access data from at least one first communication device to a second communication device, anddividing the plurality of random access slots of the random access time window into at least two groups each having a respective initial size, andallocating the groups to respective priority classes,whereby the priority classes represent the transmission priorities of the random access data to be transmitted in the random access slots,whereby the size of at least one of said groups is changed in accordance with changing needs such that a probability of access for the at least one group is dynamically changed, andwhereby contents of one of said groups are permitted to overlap with another of said groups.
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Abstract
The present invention relates to a method and to devices for transmitting and receiving data in a code division multiple access telecommunication system. A random access time window (20) is provided, which comprises a plurality of random access slots for transmitting random access data, for example from a mobile station (24) to a base station (25). The plurality of random access slots in the random access time window (20) is divided into at least two groups, whereby the groups are allocated to respective priority classes, whereby the priority classes represent the transmission priorities of the random access data to be transmitted in the random access slots. The present invention allows a reduction in congestion on the random access slots for certain access types at the expense of other access types and a more efficient use of the random access time window.
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Citations
23 Claims
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1. Method for transmitting and receiving data in a code division multiple access telecommunication system, comprising the steps of:
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providing a random access time window comprising a plurality of random access slots for transmitting random access data from at least one first communication device to a second communication device, and dividing the plurality of random access slots of the random access time window into at least two groups each having a respective initial size, and allocating the groups to respective priority classes, whereby the priority classes represent the transmission priorities of the random access data to be transmitted in the random access slots, whereby the size of at least one of said groups is changed in accordance with changing needs such that a probability of access for the at least one group is dynamically changed, and whereby contents of one of said groups are permitted to overlap with another of said groups. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Device for transmitting and receiving data in a code division multiple access telecommunication system,
in which a random access time window comprising a plurality of random access slots for transmitting random access data is provided, the plurality of random access slots of the random access time window being divided into at least two groups each having a respective initial size, and the groups being allocated to respective priority classes, whereby the priority classes represent the transmission priorities of the random access data to be transmitted in the random access slots, with means for randomly choosing one or more random access slots from a group having a certain priority class corresponding to the transmission priority of the random access data to be transmitted, means for transmitting the random access data in said chosen random access slot(s), whereby the size of at least one of said groups is changed in accordance with changing needs such that a probability of access for the at least one group is dynamically changed, and whereby contents of one of said groups are permitted to overlap with another of said groups.
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12. Device for transmitting and receiving data in a code Division multiple access telecommunication system,
in which a random access time window comprising a plurality of random access slots for transmitting random access data is provided, with means for dividing the plurality of random access slots of the random access time window into at least two groups each having a respective initial size, whereby the groups are allocated to respective priority classes, the priority classes representing the transmission priorities of the random access data to be transmitted in the random access slots, means for transmitting information defining the groups of the random access time window, whereby the size of at least one of said groups is changed in accordance with changing needs such that a probability of access for the at least one group is dynamically changed, and whereby contents of one of said groups are permitted to overlap with another of said groups.
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16. Method for transmitting random access data in a code division multiple access telecommunication system, comprising the steps of;
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randomly choosing one or more random access slots from a divided random access resource, and transmitting the random access data in the chosen one or more random access slots, wherein the divided random access resource is one of a plurality of random access resources provided by dividing available random access resources in accordance with priority classes being assigned to the plurality of random access resources respectively, and wherein the divided random access resource is defined by at least one signature assigned from available 16 separate signature codes based on the priority class assigned to the divided random access resource.
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17. Method for receiving random access data at a base station in a code division multiple access telecommunication system, comprising the steps of;
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receiving the random access data transmitted from a mobile station, and generating an information signal which is necessary to operate the base station, wherein the random access data was randomly provided in one or more random access slots from a divided random access resource, wherein the divided random access resource is one of a plurality of random access resources provided by dividing available random access resources in accordance with priority classes assigned to the plurality of random access resources respectively, and wherein the divided random access resource is defined by at least one signature assigned from available 16 separate signature codes based on the priority class assigned to the divided random access resource.
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18. Method for receiving random access data at a base station in a wireless telecommunication system, comprising the steps of;
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receiving the random access data transmitted from a mobile station, and generating an information signal for operating the base station, wherein the random access data was randomly provided in one or more random access slots from a partitioned random access resource, the partitioned random access resource is established by partitioning available random access resources into a plurality of partitioned random access resources in accordance with a priority class which is assigned to the partitioned random access resource, wherein the partitioned random access resources is defined by at least one signature assigned as one of available 16 separate signature codes corresponding to the available random access resources.
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19. Method for receiving random access data at a base station in a wireless telecommunication system, comprising the steps of;
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receiving the random access data transmitted from a mobile station, and generating an information signal necessary for operating the base station, wherein the random access data was randomly provided in one or more random access slots from a partitioned random access resource at the mobile station, the partitioned random access resource is provided by partitioning available random access resources into a plurality of partitioned random access resources, each of the plurality of partitioned random access resources being defined by signature codes assigned from available 16 separate signature codes, in accordance with one or more priority classes assigned to the plurality of partitioned random access resources.
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20. Method for receiving random access data at a base station in a wireless telecommunication system, comprising the steps of;
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receiving the random access data transmitted from a mobile station, and generating an information signal necessary for operating the base station, wherein the random access data was randomly provided in one or more random access slots from a partitioned random access resource at the mobile station, wherein available random access resources are divided into at least a first random access resource and a second random access resource, the first and second random access resources being defined by first one or more signature codes and second one or more signature codes, respectively, which are assigned from available 16 separate signature codes to correspond to the available random access resources, and wherein priority classes corresponding to transmission priority of the random access data that is transmitted are assigned to the random access resources so that an access probability of the random access data in the first random access resource is different from an access probability of the random access data in the second random access resource.
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21. Method for receiving random access data in a wireless telecommunication system, comprising the steps of;
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defining random access resources provided by a plurality of random access slots and 16 separate signature codes, dividing the plurality of random access resources into at least two groups, each group having random access slots and separate signature codes, allocating the groups of the random access resources to respective priority classes, broadcasting information of said allocation and groups of random access resources provided by the random access slots and signature codes, and receiving random access data allocated to said groups of random access resources.
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22. Method for receiving random access data in a wireless telecommunication system, comprising the steps of;
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defining random access resources having a plurality of random access slots and 16 separate signature codes, dividing the plurality of random access resources into at least two groups, each group having random access slots and separate signature codes, allocating the groups of the random access resources to respective content or type of broadcasting information of said allocation and groups of random access resources provided by the random access slots and signature codes, and receiving random access data allocated to said groups of random access resources.
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23. A code division multiple access telecommunication system, comprising:
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means for randomly choosing one or more random access slots from a divided random access resource, and means for transmitting the random access data in the chosen one or more random access slots, wherein the divided random access resource is one of a plurality of random access resources provided by dividing available random access resources in accordance with priority classes being assigned to the plurality of random access resources respectively, and wherein the divided random access resource is defined by at least one signature assigned from available 16 separate signature codes based on the priority class assigned to the divided random access resource.
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Specification