METHOD FOR ALLOCATING RESOURCE IN LTE SYSTEM

• US 20120063405A1
• Filed: 05/18/2010
• Published: 03/15/2012
• Est. Priority Date: 05/18/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Han, Jin Kyu, Cho, Joon Young, Lee, Ju Ho
• Granted Patent: US 8,634,368 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 25/0222 Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 65/1066 Session management
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource

Abstract

The present invention relates to a fractional RB (Resource Block) allocation method which enables resource allocation in a unit smaller than RB to improve the capacity of VoIP (Voice over Internet Protocol) in an LTE (Long Term Evolution) system. That is, the present invention introduces a resource arrangement method which allows different users to share the same resource, without even using an SDMA, and a method for informing the fractional RB allocation and how to use the same. A method for introducing multiplexation into an RB and changing the RE arrangement is proposed to support the downlink fractional RB allocation. A method for changing the RE arrangement is also proposed to support the uplink fractional RB allocation. According to the present invention, to provide a consistent service with a small amount of traffic generated as in the VoIP, resources of a smaller amount than a single RB can be used for a terminal with a good channel state. In the present invention, the occupancy of resources for the terminals of an excellent channel state is reduced so that the capacity of the VoIP can be improved.

Claims

1. A resource allocation method for an LTE system, comprising:

generating modulation symbols streams by performing channel coding and modulation on transport blocks corresponding to first and second data to be transmitted to respective users;

multiplexing the modulation symbols stream alternately in unit of two continuous modulation symbols; and

transmitting the multiplexed modulation symbol stream as mapped to corresponding resource.

2. The resource allocation method of claim 1, wherein transmitting comprises:

sending, at a base station, downlink resource allocation information to the respective users through Physical Downlink Control Channel (PDCCH);

acquiring, at a terminal, transmission format for transmitting the transport blocks through PDCCH and the resource allocation information; and

receiving, at the terminal, the transport block on the corresponding resource indicated by the resource allocation information.

3. The resource allocation method of claim 1, wherein multiplexing comprises selecting one of a transmit diversity scheme, a time division multiplexing scheme, a frequency division multiplexing scheme, and a code division multiplexing scheme for multiplexing the modulation symbols.

4. The resource allocation method of claim 2, wherein the terminal comprises at least one receive antenna.

5. A resource allocation method for an LTE system, comprising:

generating, at a base station, modulation symbol streams by performing channel coding and modulation on transport blocks corresponding to first and second data to be transmitted to respective users, multiplexing the modulation symbols stream alternately in unit of two continuous modulation symbols, transmitting the multiplexed modulation symbol stream as mapped to corresponding resource, and transmitting uplink resource allocation information for arranging resource for uplink transmission to respective user terminals;

arranging, at a user terminal, resources on time axis based on the uplink resource allocation information and transmitting data on the arranged resources.

6. The resource allocation method of claim 5, wherein the user terminal arranges resources on frequency axis based on the uplink resource allocation information and transmitting data on the arranged resources.

7. A resource allocation system comprising:

a base station which generates, at a base station, modulation symbol streams by performing channel coding and modulation on transport blocks corresponding to first and second data to be transmitted to respective users, multiplexes the modulation symbol streams alternately in unit of two continuous modulation symbols, transmits the multiplexed modulation symbol stream as mapped to corresponding resource, and transmits uplink resource allocation information for arranging resource for uplink transmission to respective user terminals; and

user terminals which arrange resources on time axis based on the uplink resource allocation information and transmit data on the arranged resources.

8. The resource allocation system of claim 7, wherein the base station transmits downlink resource allocation information to the user terminals through Physical Downlink Control Channel (PDCCH).

9. The resource allocation system of claim 8, wherein the user terminal acquires transmission format of the transport blocks through PDCCH and resource allocation information indicating the resource allocated for the modulation symbol streams and receives the transport blocks on the allocated resources.

10. The resource allocation system of claim 7, wherein the base station multiplexes the modulation symbol streams using one of a transmit diversity scheme, a time division multiplexing scheme, a frequency division multiplexing scheme, and a code division multiplexing scheme for multiplexing the modulation symbols.

11. The resource allocation system of claim 7, wherein the user terminal comprises at least one receive antenna.