Wireless communication method and wireless communication terminal for coexistence with legacy wireless communication terminal
US-12149354-B2 · Nov 19, 2024 · US
Method of reference signal allocation in wireless communication systems
US9628233B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9628233-B2 |
| Application number | US-87136010-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 30, 2010 |
| Priority date | Aug 28, 2009 |
| Publication date | Apr 18, 2017 |
| Grant date | Apr 18, 2017 |
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Abstract
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A method is provided for determining reference signal positions in a frequency-time domain in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A plurality of sub-carriers are selected in one resource block according to a predetermined mother pattern for reference signal allocation. When a single resource block is assigned for transmission to a user, the reference signal positions are determined corresponding to the plurality of selected sub-carriers in the single resource block. When multiple resource blocks are assigned for transmission to a user, the reference signal positions are determined in the multiple resource blocks by reducing a number of the plurality of selected sub-carriers in the mother pattern for at least one of the multiple resource blocks.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of determining reference signal positions in a frequency-time domain in an Orthogonal Frequency Division Multiple Access (OFDMA) system, the method comprising the steps of: selecting, by a terminal of the OFDMA system, a plurality of sub-carriers in one resource block according to a predetermined mother pattern for reference signal allocation; when a single resource block is assigned for transmission to a user, determining the reference signal positions corresponding to the plurality of selected sub-carriers in the single resource block, by the terminal of the OFDMA system; and when multiple resource blocks are assigned for transmission to a user, determining, by the terminal of the OFDMA system, the reference signal positions in the multiple resource blocks corresponding to the mother pattern, wherein the mother pattern of at least one of the multiple resource blocks has a reduced number of the plurality of selected sub-carriers disposed near an edge of the at least one of the multiple resource blocks. 2. The method of claim 1 , wherein allocated powers for the plurality of sub-carriers corresponding to the determined reference signal positions are not changed when the multiple resource blocks are assigned for transmission to the user. 3. The method of claim 1 , wherein allocated powers for the plurality of sub-carriers corresponding to the determined reference signal positions are changed when the multiple resource blocks are assigned for transmission to the user. 4. The method of claim 1 , wherein determining the reference signal positions in the multiple resource blocks comprises switching the reference signal positions for at least two of a plurality of transmission layers. 5. A method of determining reference signal positions in a frequency-time domain in an Orthogonal Frequency Division Multiple Access (OFDMA) system, the method comprising the steps of: selecting, by a base station of the OFDMA system, a plurality of sub-carriers in one resource block according to a predetermined mother pattern for reference signal allocation; when a single resource block is assigned for transmission to a user, determining the reference signal positions corresponding to the plurality of selected sub-carriers in the single resource block, by the base station of the OFDMA system; and when multiple resource blocks are assigned for transmission to a user, determining, by the base station of the OFDMA system, the reference signal positions in the multiple resource blocks corresponding to the mother pattern, wherein the mother pattern of at least one of the multiple resource blocks has a reduced number of the plurality of selected sub-carriers disposed near an edge of the at least one of the multiple resource blocks. 6. The method of claim 5 , wherein allocated powers for the plurality of sub-carriers corresponding to the determined reference signal positions are not changed when the multiple resource blocks are assigned for transmission to the user. 7. The method of claim 5 , wherein allocated powers for the plurality of sub-carriers corresponding to the determined reference signal positions are changed when the multiple resource blocks are assigned for transmission to the user. 8. The method of claim 5 , wherein determining the reference signal positions in the multiple resource blocks comprises switching the reference signal positions for at least two of a plurality of transmission layers.
Assignees
Inventors
Classifications
- H04L5/0048Primary
Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title
Power control of control or pilot channels · CPC title
Variable allocation of band or rate · CPC title
the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title
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- What does patent US9628233B2 cover?
- A method is provided for determining reference signal positions in a frequency-time domain in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A plurality of sub-carriers are selected in one resource block according to a predetermined mother pattern for reference signal allocation. When a single resource block is assigned for transmission to a user, the reference signal position…
- Who is the assignee on this patent?
- Cheng Shan, Kim Sung Tae, Han Jin Kyu, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H04L5/0048. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 18 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).