Method and system for managing radio resources in a time-slotted communication system

• US 9,456,451 B2
• Filed: 01/17/2007
• Issued: 09/27/2016
• Est. Priority Date: 07/09/2003
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Livet, Catherine, Lu, Guang, Rahman, Shamim Akbar, Zaki, Maged
• Primary Examiner(s): KELLEY, STEVEN SHAUN
• Application Number:
  US11/654,765
• Publication Number:
  US 20070115893A1
• Time in Patent Office: 3,541 Days
• Field of Search: 370/337
• US Class Current: 1/1
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04W 28/0268 using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/0289 Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

A method and system for managing radio resources in a time-slotted wireless communication system is based on the quality of service (QoS) information of a user. A plurality of time slots of a radio resource are sorted into a plurality of different categories, such as high QoS time slots, high capacity time slots, and balanced time slots. Each category is associated with a different level of QoS. QoS information with respect to a user is obtained in response to a radio resource request received from the user. The user is associated with a particular category of time slots based on the QoS information of the user.

Claims

1. A method of managing radio resources in time division duplex wireless communications comprising:

receiving a radio resource request from a user;

obtaining a quality of service (QoS) classification of the user, wherein the QoS classification is based on a user'"'"'s subscription status, geographic information, and a user'"'"'s subscriber classification;

defining a plurality of time slot designations, wherein each time slot designation has an associated QoS level and capacity;

mapping the user to one of the time slot designations based on the QoS classification of the user; and

determining whether to initiate handover (HO) in response to the user crossing a boundary between cells, wherein HO is performed if a target cell provides sufficient resources and, if the target cell does not provide sufficient resources to service a high-QoS user in response to detecting congestion in the high-QoS time slot designation, freeing high capacity time slots to be able to accept incoming high-QoS users, wherein incoming balanced user requests are accepted by adjusting QoS requirements in order to not congest the system, and incoming high capacity requests are rejected in response to detecting congestion in the high-QoS time slot designation, and determining whether to adjust a data rate and high QoS time slots are given a guaranteed bit rate plus a predefined margin, balanced time slots are given a guaranteed bit rate, and high capacity time slots are not guaranteed a bit rate, wherein;

on a condition that congestion is detected on the mapped time slot designation, dynamically adjusting a number of time slots assigned to each time slot designation, wherein if congestion occurs with high QoS time slots, increasing the number of high QoS time slots available and decreasing the number of high capacity time slots available and, if necessary, the number of balanced time slots available after exhaustion of the available high capacity time slots, and if congestion occurs with balanced time slots, increasing the number of balanced time slots available, and decreasing the number of high capacity time slots available,

on a condition that HO initiation is determined, releasing high capacity time slots and adjusting QoS requirements of balanced time slot requests;

on a condition that the processing of data packets is required, adjusting delay and jitter for processing data packets, based on the time slot designation, and

on condition that the data rate adjustment is required, adjusting the bit rate based on the time slot designation.

2. The method of claim 1, wherein the plurality of time slot designations includes at least one of a high QoS time slot, a high capacity time slot, a balanced time slot, a real time (RT) time slot and a non-real time (NRT) time slot.

3. A radio network controller (RNC) for managing radio resources in time division duplex wireless communications:

the RNC to receive a radio resource request from a user and to obtain a quality of service (QoS) classification of the user, wherein the QoS classification is based on a user'"'"'s subscription status, geographic information, and a user'"'"'s subscriber classification;

the RNC to map the user to one of a plurality time slot designations based on the QoS classification;

the RNC to determine whether to initiate handover (HO) in response to the user crossing a boundary between cells, wherein the HO is performed if a target cell provides sufficient resources and, if the target cell does not provide sufficient resources to service a high-QoS user in response to detecting congestion in the high-QoS time slot designation, to free high capacity time slots to be able to accept incoming high-QoS users;

the RNC to accept incoming balanced user requests by adjusting QoS requirements in order to not congest the system, and further wherein incoming high capacity requests are rejected in response to detecting congestion in the high-QoS time slot designation; and

the RNC to determine whether to adjust a data rate, wherein high QoS time slots are given a guaranteed bit rate plus a predefined margin, wherein balanced time slots are given a guaranteed bit rate, and further wherein high capacity time slots are not guaranteed a bit rate on the following conditions;

on a condition that congestion is detected on the mapped time slot designation, the RNC dynamically adjusting a number of time slots assigned to each time slot designation, wherein if congestion occurs with high QoS time slots, increasing the number of high QoS time slots available and decreasing the number of high capacity time slots available and, if necessary, the number of balanced time slots available after exhaustion of the available high capacity time slots, and if congestion occurs with balanced time slots, increasing the number of balanced time slots available, and decreasing the number of high capacity time slots available,

on a condition that HO initiation is determined, the RNC releasing high capacity time slots and adjusting QoS requirements of balanced time slot requests,

on a condition that the processing of data packets is required, the RNC adjusting delay and jitter for processing data packets, based on the time slot designation, and

on condition that the data rate adjustment is required, the RNC adjusting the bit rate based on the time slot designation.

4. The RNC of claim 3, wherein the plurality of time slot designations includes at least one of a high QoS time slot, a high capacity time slot, a balanced time slot, a real time (RT) time slot and a non-real time (NRT) time slot.

5. A base station for managing radio resources in time division duplex wireless communications:

the base station including a receiver to receive a radio resource request from a user and to obtain a quality of service (QoS) classification of the user, wherein the QoS classification is based on a user'"'"'s subscription status, geographic information, and a user'"'"'s subscriber classification;

the base station to map the user to one of a plurality of time slot designations based on the QoS classification;

the base station to determine whether to initiate handover (HO) in response to the user crossing a boundary between cells, wherein the HO is performed if a target cell provides sufficient resources and, if the target cell does not provide sufficient resources to service a high-QoS user in response to detecting congestion in the high-QoS time slot designation, to free high capacity time slots to be able to accept incoming high-QoS users;

the base station to accept incoming balanced user requests by adjusting QoS requirements in order to not congest the system, and further wherein incoming high capacity requests are rejected in response to detecting congestion in the high-QoS time slot designation; and

the base station to determine whether to adjust a data rate, wherein high QoS time slots are given a guaranteed bit rate plus a predefined margin, wherein balanced time slots are given a guaranteed bit rate, and further wherein high capacity time slots are not guaranteed a bit rate on the following conditions;

on a condition that congestion is detected on the mapped time slot designation, the base station dynamically adjusting a number of time slots assigned to each time slot designation, wherein if congestion occurs with high QoS time slots, increasing the number of high QoS time slots available and decreasing the number of high capacity time slots available and, if necessary, the number of balanced time slots available after exhaustion of the available high capacity time slots, and if congestion occurs with balanced time slots, increasing the number of balanced time slots available, and decreasing the number of high capacity time slots available,

on a condition that HO initiation is determined, the base station releasing high capacity time slots and adjusting QoS requirements of balanced time slot requests,

on a condition that the processing of data packets is required, the base station adjusting delay and jitter for processing data packets, based on the time slot designation, and

on condition that the data rate adjustment is required, the base station adjusting the bit rate based on the time slot designation.

6. The base station of claim 5, wherein the plurality of time slot designations includes at least one of a high QoS time slot, a high capacity time slot, a balanced time slot, a real time (RT) time slot and a non-real time (NRT) time slot.