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Resource granting in multi-carrier CDMA systems

A multi-carrier and resource technology, applied in the direction of transmission system, digital transmission system, network traffic/resource management, etc., can solve the problems of not considering the availability of radio links, the loss of conventional networks, and the inability to point out the load across relative carrier frequencies, etc.

Inactive Publication Date: 2006-01-04
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since those users may be served in soft handover from neighboring cells, the relative carrier load in that cell gives little indication of the relative carrier load across cells that will or may be used to support the mobile station
[0006] Additionally, if radio link availability across multiple CDMA channels is not considered, conventional networks lose increased Opportunities for Service Reliability

Method used

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  • Resource granting in multi-carrier CDMA systems
  • Resource granting in multi-carrier CDMA systems
  • Resource granting in multi-carrier CDMA systems

Examples

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Embodiment Construction

[0023] 1 illustrates an exemplary wireless communication network 10, such as an IS-2000 CDMA network, including a radio access network (RAN) 12 that provides a plurality of CDMA channels 14 for communicatively connecting a plurality of mobile stations 16 with one or A number of external networks, such as the Public Switched Telephone Network (PSTN) 18, and one or more Public Data Networks (PDN) 20, such as the Internet. Packet Switched Core Network (PSCN) 22 communicatively connects RAN 12 to PDN 20 , and Circuit Switched Core Network (CSCN) 24 likewise communicatively connects RAN 12 to PSTN 18 . With this exemplary arrangement, network 10 provides circuit-switched communications (eg, audio, fax) and packet-switched communications (eg, web browsing, streaming, email, etc.) to mobile stations 16.

[0024] The exemplary RAN 12 includes one or more base station controllers (BSCs) 30 each controlling one or more radio base stations (RBSs) 32 . In an exemplary embodiment, each BS...

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Abstract

In one embodiment, a multi-carrier CDMA network grants radio link resources to a mobile station by maximizing soft handoff conditions, by preserving frequency continuity with the mobile station, or by load balancing across carrier frequencies in two or more cells, or by some combination thereof. The network identifies carrier frequencies having two or more CDMA channels for assignment to the mobile station. If one of those frequencies was used by the mobile station to request resources, it may be advantageous to select that frequency; otherwise or instead, the choice is narrowed to the carrier frequency or frequencies having the greatest number of available radio links. From that point, the choice may be further narrowed, for example, by selecting the carrier frequency having the most favorable CDMA channel loading across two or more cells. In another embodiment, such multi-carrier load balancing is the basis of carrier frequency selection.

Description

Background of the invention [0001] The present invention relates generally to resource allocation in wireless communication networks, and in particular to efficient resource allocation of user grants, such as at call origination or at hard handoffs. [0002] Limited communication resources constrain the number of mobile stations and other wireless communication devices (users) that can be supported within a given service area. For example, a typical Code Division Multiple Access (CDMA) network uses at least one "CDMA channel" within a defined service area (cell). In this context, a CDMA channel represents a collection of forward and reverse communication links between the network and users on a specific carrier frequency. Thus, a CDMA channel can be thought of as an "intersection" between a particular CDMA carrier and a particular cell. [0003] On the forward link, the capacity of a CDMA channel is constrained, inter alia, by available transmit power and available spreading...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04Q7/36H04B1/707H04J13/00H04L5/02H04L12/56H04W16/10H04W28/10H04W36/18H04W36/30H04W72/00
CPCH04W16/10H04L5/026H04W28/10H04W72/04H04W36/30H04W36/18H04W72/02H04W72/0453H04W72/21
Inventor P·N·鲁齐维斯特T·露夫Y·泳
Owner TELEFON AB LM ERICSSON (PUBL)
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